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Lagacé, Marylène. "The effect of different storage conditions on the quality of orange juice /". Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20831.
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Unpasteurized (condition A) and pasteurized (condition B) orange juice samples were stored frozen for eight months. In addition, pasteurized samples were also aseptically packaged and stored at +1°C in polyethylene bags (condition C). Nine quality parameters were monitored during the eight months of storage: sedimentation of the pulp, cloud measurement, aroma volatiles, ascorbic acid concentration, viscosity, density, colour, sugar content (sucrose, glucose and fructose), organic acids (malic and citric), in addition to sensory analysis. The optimum storage condition for freshly processed orange juice was the unpasteurized frozen storage method (condition A). The juice retained most of its chemical and physical properties and was rated by a sensory panel to have the highest sensory score.
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Li, Zhuo 1958. "Studies on the storage of orange juice". Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63766.
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Garcia-Wass, Febe. "Orange juice authenticity using pyrolysis mass spectrometry". Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312084.
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Basak, Sarmistha. "Studies on high pressure processing of orange juice : enzyme inactivation, microbial destruction, and quality changes, process verification and storage". Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36874.
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High pressure (HP) processing has been emerging rapidly as a novel technique for non-thermal preservation of foods. Application of HP processing for shelf life extension of orange juice was the principal objective of the current research. To accomplish this objective, and to establish a scientific basis for HP processing of orange juice, a systemic approach was used which included the evaluation of: (a) HP inactivation kinetics of pectin methyl esterase (PME, the key enzyme in orange juice implicated with respect to quality changes), (b) destruction of spoilage microorganisms and changes in product quality, (c) HP process verification and finally, (d) storage studies on HP treated orange juice.In preliminary studies, the effect of HP treatment on indigenous microorganisms, texture and color of selected fresh fruits and vegetables were evaluated. Results showed that HP had a significant effect on the destruction of microorganisms. Product texture and color were mildly affected, often resembling the appearance of mildly heat-treated products.
Pressure induced inactivation kinetics of pectin methyl esterase (PME) was investigated at pH 3.7 and 3.2 in freshly squeezed single strength (12.6°Brix) and concentrated (10--40° Brix) orange juice. Results showed a biphasic nature of pressure induced inactivation of PME in both juices. The first phase consisted of rapid change in inactivation of enzyme, designated as instantaneous pressure kill (IPK), due to pulse pressurization, followed by gradual inactivation of enzyme, characterized by a first order rate of inactivation during pressure hold-time.
Combination treatment involving pressure cycle, pressure level and pressure hold-time was then evaluated for inactivation of PME using a response surface methodology. Overall, pressure pulse had a lower effect on inactivation of PME compared to other factors.
Pressure destruction kinetics of Leuconostoc mesenteroides and Saccharomyces cerevisiae the spoilage organisms in orange juice, were then investigated. Pressure destruction kinetics followed the same dual effect behavior, as observed with PME inactivation. IPK effect increased with pressure cycles and was more pronounced with S. cerevisiae that Leu. mesenteroides.
Storage studies of HP treated single strength and concentrated orange juice were conducted at selected temperatures (4, 10 and 20°C). Results showed that treated juice was microbiologically stable from a few days to several weeks depending on type of juice, storage temperature and processing conditions. (Abstract shortened by UMI.)
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Almeida, Francisca Diva Lima. "Employment of emerging technologies on orange juice processing added of prebiotic fructo-oligosaccharide and orange juice produced via enzymatic synthesis". Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16471.
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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel SuperiorConselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico
The aim of this research was to use emerging technologies on the processing of the prebiotic orange juice added of fructo-oligosaccharides (FOS) and in prebiotic orange juice produced by enzymatic synthesis. The first stage of the study was evaluated the effect of atmospheric pressure cold plasma (ACP) and high pressure processing (HPP) on the prebiotic orange juice added 7% commercial FOS. The orange juice was directly and indirectly exposed to plasma discharge at 70 kV with processing times of 15, 30, 45 and 60 seconds. For high pressure processing, the juice containing the same concentration of FOS was treated at 450 bars for 5 minutes. After the treatments, the fructo-oligosaccharides were qualified and quantified by Thin Layer Chromatography (TLC), using densitometer. The organic acids, color analysis and pH values were also evaluated. Both processes did not degrade the FOS. The organic acids and the color of the treated samples were also preserved. On the second stage of the study, the effect of plasma and ozone treatments on prebiotic orange juice produced by enzymatic synthesis were evaluated. The orange juice was directly and indirectly exposed to plasma discharge at 70 kV with processing times of 15, 30, 45 and 60 seconds. For ozone processing, different loads (0.057, 0.128 and 0.230 mg/ O3.mL of juice) were evaluated. After the treatments, the oligosaccharides were quantified by HPLC. The juice pH, color, total phenolic content and total antioxidant activity were also determined. Both processes promoted a partial degradation of the oligosaccharides in the juice. However, the juice maintained an enough amount of oligosaccharides to be classified as a prebiotic food. The other parameters analyzed were preserved. Thus, atmospheric cold plasma and ozone are suitable non-thermal alternatives for prebiotic orange juice treatment.
O objetivo desta pesquisa foi empregar tecnologias emergentes no processamento de suco prebiÃtico de laranja adicionado de fruto-oligossacarÃdeos (FOS) e em suco prebiÃtico de laranja produzido via sÃntese enzimÃtica. A primeira etapa da pesquisa consistiu em avaliar o efeito da aplicaÃÃo das tecnologias de plasma e de alta pressÃo, como mÃtodos de conservaÃÃo, em suco de laranja adicionado de 7% de FOS comercial. O suco foi exposto direta e indiretamente ao processamento por plasma em diferentes tempos: 15 30, 45 e 60 s. Para o processamento com alta pressÃo, o suco foi tratado a uma pressÃo de 450 bars por 5 minutos. ApÃs os tratamentos, a concentraÃÃo de fruto-oligossacarÃdeos foi quantificada pela tÃcnica de cromatografia em camada delgada (CCD), utilizando o equipamento densitÃmetro. DeterminaÃÃes de cor, pH e concentraÃÃo de Ãcidos orgÃnicos foram tambÃm realizadas. Ambos os processos nÃo degradaram os FOS presentes no suco. Ãcidos orgÃnicos e a cor das amostras tratadas tambÃm foram preservados. Na segunda etapa da pesquisa, foi avaliado o efeito da aplicaÃÃo dos tratamentos de plasma e ozÃnio em suco prebiÃtico de laranja produzido via sÃntese enzimÃtica. O suco foi exposto direta e indiretamente ao processamento por plasma, a 70 kV, em diferentes tempos: 15 30, 45 e 60 s. Para o processamento com ozÃnio, diferentes cargas (0,057, 0,128 e 0,230 mg/ O3.mL de suco) foram avaliadas. ApÃs os tratamentos, a concentraÃÃo de oligossacarÃdeos foi determinada pela tÃcnica de HPLC. Os valores de pH, cor, conteÃdo de fenÃlicos totais e atividade antioxidante total tambÃm foram determinados. Ambos os processos promoveram uma degradaÃÃo parcial dos oligossacarÃdeos no suco. Contudo, o suco manteve uma quantidade suficiente de oligossacarÃdeos para ser classificado como um alimento prebiÃtico. Os demais parÃmetros analisados foram preservados. Diante disso, sugere-se que os tratamentos de plasma, alta pressÃo e ozÃnio sÃo alternativas nÃo tÃrmicas adequadas para o tratamento de suco de laranja prebiÃtico.
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Boff, Jeffrey Michael. "Study of volatile compound formation in oxidized lipids and volatile compound retention in processed orange juice". Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1054660479.
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Thesis (Ph. D.)--Ohio State University, 2003.Title from first page of PDF file. Document formatted into pages; contains xxi., 190 p.: ill. Includes abstract and vita. Advisor: David B. Min, Dept. of Food Science and Nutrition. Includes bibliographical references (p. 179-190).
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Ayhan, Zehra. "Packaging requirements for pulsed electric field processed orange juice /". The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488196781734345.
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Donato, Roberta M. "Globalization and trade relations the US and Brazilian orange juice dispute /". Ohio : Ohio University, 2006. http://www.ohiolink.edu/etd/view.cgi?ohiou1141950268.
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Rintelmann, Anke. "DNA based methods for food authentication". Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272357.
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Vieira, Fabiana Neves. "Effect of pasteurisation and high pressure on orange juice properties". Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/10100.
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Mestrado em Bioquímica - Bioquímica AlimentarAs frutas e os produtos derivados de fruta recebem cada vez mais atenção, não só pela sua elevada estabilidade após o processamento através de técnicas tradicionais, mas também devido ao seu elevado conteúdo em compostos bioativos. As características únicas de sabor, aroma e textura são as principais razões da grande aceitação do sumo de laranja, por parte dos consumidores. A utilização de novas técnicas de processamento não térmico para os alimentos tem vindo a aumentar ao longo dos últimos anos. Além disso, a maior procura por produtos microbiologicamente seguros que mantenham as suas características e qualidades originais é a razão mais evidente para o desenvolvimento do processamento por alta pressão como alternativa não térmica. Assim, o principal objetivo deste trabalho foi estudar possíveis benefícios da utilização desta técnica aplicada aos sumos de laranja, comparando esta tecnologia inovadora com o método comumente utilizado no processamento de sumos de laranja, a pasteurização térmica. Foi assim avaliado o efeito da aplicação de tratamento térmico (70°C, 30 seg) e de alta pressão (550 MPa, 70 seg, 18°C) no processamento de sumo de laranja ao longo de 36 dias de armazenamento sobre alguns compostos bioativos, como antocianinas, flavonoides, carotenoides e compostos fenólicos, na atividade antioxidante, cor e sólidos solúveis totais. Observouse que, comparativamente ao tratamento térmico, a alta pressão promove a retenção dos compostos fenólicos como antocianinas e flavonoides, aumentando atividade antioxidante do sumo de laranja. Relativamente à cor verificaram-se alterações bastante importantes podendo estar associadas às grandes perdas no conteúdo total de carotenoides. No que respeita a identificação e quantificação dos compostos fenólicos, foram verificados um ácido orgânico (ácido quínico) e 4 compostos fenólicos (ácido elágico, narirutina, vicenina II, e hesperidina). Observou-se que, à excepção do ácido quínico não ocorrem diferenças significativas ao longo do tempo de armazenamento e entre ambas as técnicas de processamento. No entanto, a sua concentração é alterada verificando-se em alguns casos, diminuição significativas no sumo processado por alta pressão, quando comparado com o sumo tratado termicamente. Dessa forma, este trabalho permitiu verificar que a alta pressão promove efeitos benéficos no sumo de laranja podendo, assim, ser utilizada como alternativa às técnicas de processamento térmicas.
Fruits and fruit products receive more and more attention, not only because its low stability when processed by traditional technologies, as pasteurisation; but also due to its high content of bioactive compounds. The favourable ratio of sugar to acid along with the unique orange flavour, gives orange juice its universal high consumer acceptance. The use of novel nonthermal processing food technologies has emerged during the past few years. Moreover, the increasing demand of safer products that maintain their original qualities is the major driver of high pressure processing (HPP) technique development as an alternative to thermal treatment. So, the principal objective of this work was to study the possible benefits on the utilisation of this technique applied on orange juices, when compared to the most commonly used method, thermal pasteurisation. Thus, it has been verified thermal (70°C, 30 sec) and high pressure (550 MPa, 70 sec, 18°C) processing effects during 36 days of storage regarding some bioactive compounds, such as anthocyanins, flavonoids, carotenoids and phenolics, on antioxidant activity, total soluble solids and colour. Here was observed that, comparing with thermal treatment, HP promotes the retention of phenolic compounds such as anthocyanins and flavonoids, increasing the orange juice antioxidant activity. Regarding the colour of the samples were verified some important changes which might be associated mainly to total content of carotenoids losses. Also the characterization and quantification of phenolics present on orange juice samples allowed the identification of one organic acid (quinic acid) and four phenolic acids (ellagic acid, narirutin, vicenin II and hesperidin). Was observed that with the exception of quinic acid, there are no significant changes within the storage time and type of process. However their concentration it’s changed and in some cases it was observed significant decreases on HPP orange juice when compared with TP samples. Thus, with this work was verified that HPP promotes some beneficial effects on orange juice being a great alternative to thermal processing methods used before for this type of products.
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Feng, Jingyi. "Determination of thiabendazole in orange juice using an MISPE-SERS chemosensor". Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60690.
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Thiabendazole is a systemic fungicide frequently used to treat vegetables and fruits during the post-harvest process, leading to potential detriment to consumers. This work has combined molecularly imprinted polymers (MIPs) with surface enhanced Raman spectroscopy (SERS) to afford a novel MISPE-SERS chemosensor to determine trace amount of thiabendazole in orange juice. MIPs were synthesized via precipitation polymerization. Kinetic and static adsorption tests validated the efficient separation and enrichment of thiabendazole by using MIPs. Synthesized MIPs were packed into solid phase extraction (SPE) cartridge to work as tailor-made sorbents for the separation of thiabendazole in orange juice. Silver colloid functioned as SERS-active substrate to quantify eluted thiabendazole by MISPE-SERS chemosensor. The whole process only took 23 min with limit of detection of 4 ppm for thiabendazole. In sum, this MISPE-SERS chemosensor can be considered as a promising method for fast and high-throughput detection of trace amount of thiabendazole in agri-food products.Science, Faculty of
Chemistry, Department of
Graduate
12
Anvarian, Amir Hossein Pour-Taghi. "Physiology of Escherichia coli in orange juice : applications of flow cytometry". Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5653/.
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Flow cytometry (FCM) was utilized for monitoring the physiology of \(E.\) \(coli\) cells in orange juice (OJ) as well as a model orange juice (MOJ). Compared to FCM, plate counts highly underestimated the true number of viable cells in OJ. As a part of this study, the effects of the change in major components of OJ on viability of the cells in OJ and MOJ was investigated using FCM. Increase in ascorbic acid and amino acid concentrations of MOJ improved both the culturability and FCM viability of the cells. FCM was also employed for studying the effects of OJ clarification on viability of \(E.\) \(coli\) in OJ. Although, reduction in cloud content of OJ increased the number of healthy cells, however, the removal of cloud particles of larger than 0.7 μm appeared to increase the antimicrobial efficacy of particles of smaller than 0.7 μm. The effects of washing E. coli cells with available chlorine, H\(_2\)O\(_2\) and organic acids on their subsequent viability in OJ was also investigated. While increase in concentration of sanitizers resulted in a significant reduction in healthy populations, the total number of viable cells either remained constant or increased particularly in case of H\(_2\)O\(_2\)-washed cells.
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Donato, Roberta Mourão. "Globalization and Trade Relations: the US and Brazilian Orange Juice Dispute". Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1141950268.
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Lagace, Marylene. "The effect of different storage conditions on the quality of orange juice". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0001/MQ44201.pdf.
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Rega, Barbara. "Texture-flavour interactions : how physicochemical data explain sensory perception in orange juice". Dijon, 2003. http://www.theses.fr/2003DIJOS053.
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Cette thèse a pour objectif d'étudier l'influence de la matrice alimentaire sur la libération et la perception des arômes. La première partie analyse le rôle de la pectine sur la diffusivité des arômes et sur les interactions moléculaires dans des systèmes modèles. La deuxième partie étudie le rôle des solides en suspension sur la répartition et la libération des arômes et sur la perception sensorielle dans le jus d'orange. La distribution des volatiles dans les différentes fractions du jus (pulpe, trouble et sérum) et le rôle des constituants non-volatils a premièrement été étudiée. En suite une méthodologie pour évaluer la qualité sensorielle des extraits en phase vapeur a été développée (Chromatographie gazeuse directe couplée à l'olfactométrie). Finalement, le rôle de la pulpe sur le profil sensoriel (texture, saveur, arôme odeur) du jus d'orange a été étudié. En parallèle, des analyses physico-chimiques, rhéologiques et la libération des arômes en phase vapeur ont été effectuéesThe aim of this thesis was to investigate how the properties of the food matrix influence flavour release and perception in food. The thesis is organised in two parts. The first part focused on the role of pectins on aroma compound diffusivity and molecular interactions in a model system. The second part focused on the role of suspended solids on aroma compound distribution, flavour release and sensory perception in orange juice. Firstly we determined how aroma compounds are distributed within the macroscopic juice fractions (cloud, pulp and serum) and the role of non-volatile constituents. Secondly we developed a novel methodology (Direct Gas Chromatography Olfactometry) to evaluate the sensory quality of solventless extracts (e. G. SPME, static headspace). Finally, we investigated how pulp influence sensory profiles of texture, taste, odour and aroma in orange juice. At the same time rheological and physicochemical measurements as well as flavour release studies were performed
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Hou, Min. "Factors affecting gut metabolism and bioavailabilty of orange juice flavanoes in humans". Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/7372/.
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Several studies have supported a beneficial role of dietary flavonoids in reducing the risk/progression of chronic diseases (including hypertension, cardiovascular disease, certain cancers, type-2-diabetes, cognitive dysfunction, age-related bone disease). Their beneficial properties are likely to be affected by their structure, distribution in foods, food matrix, life habits (physical activity). Most dietary polyphenols reach the colon where they are metabolized to phenolic acids by gut bacteria. Lack of knowledge of the factors affecting flavonoid metabolism and bioavailability hinders understanding of their health effects. Therefore, this thesis aimed to investigate the effect of factors on bioavailability and metabolism of dietary polyphenols from orange juices (OJ) in in vitro and in vivo studies. In chapter 3, the variability of orange juice polyphenolic content was assessed using in vitro models of the human gastrointestinal tract. Chapter 4 investigated the reduced urinary phenolic acids after OJ and yoghurt (Y) in humans compared to OJ alone using in vitro models of the human gut. In chapter 5, raftiline and glucose were tested for effects on metabolism of hesperidin (flavanone not OJ). In chapter 6, an intervention study of 4 weeks moderate intensity exercise determined whether exercise affected bioavailability and metabolism of OJ flavanones in healthy sedentary females. The studies in this thesis showed that food sources, food matrix and physical exercise may determine the significant variations in bioavailability and metabolism of flavonoids, seen in a number of studies. These factors could result in differences in bioactivity and bioefficacy of polyphenols, and need to be taken into account in further studies of the effects of flavanones on disease risk.
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Moody, Vertigo. "Thermal inactivation kinetics of Escherichia coli and Alicyclobacillus acidoterrestris in orange juice". [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0002222.
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Taherian, Ali Reza. "Rheology and stability of beverage emulsions in concentrated and diluted forms". Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103013.
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Consumer's demand for more natural and high quality food products products, presenting health benefits, has increased over the years. Besides the nutritional aspects, an appealing appearance and texture is also required. Cloudiness or opacity (cloudy appearance) is an important citrus drinks property (orange, lime, lemon, etc.), since it gives natural fruit juice appeal. This property can be achieved through addition of clouding agents, which also help in uniform distribution of flavors throughout the liquid beverage. A common problem in the beverage industry is producing cloud or flavor emulsions that remain stable over the desired shelf life. Beverage cloud emulsions are oil-in-water emulsions to provide cloudiness and are prepared in a concentrated form, but diluted prior to the consumption.Optical and rheological properties of beverage cloud emulsions as a function of water-phase and oil-phase concentrations were investigated. The specific gravity of phases, particle size distribution and creaming stability of prepared emulsions in diluted forms were evaluated. The rate of cloud emulsion creaming by determining the rheology of water phase, difference in specific gravities of the phases and droplet properties of the emulsion in presence and absence of weighting agents (sucrose acetate isobutyrate and brominated vegetable oil) or/and xanthan gum was studied. Flow and dynamic rheological properties of single-phases and emulsions containing modified starch and arabic gum as surface active hydrocolloids as well as xanthan and tragacanth as stabilizers gums were investigated. Finally, stability of cloud emulsions in orange juice drink was examined.
Oil-phase concentration had a significant effect (P < 0.05) on increasing the opacity of emulsion. Raise in viscosity of emulsions was more pronounced as oil concentration increased and shear thinning behavior of oil added emulsions was associated with droplet flocculation. Creaming in acidified sugar solution of 11°Bx and pH 3 was observed when the oil-phase specific gravity decreased and sedimentation occurred at the lower viscosity of water phase. Addition of xanthan gum into the water phase decreased the flow behavior index (n) form 0.88 down to 0.31 and increased elastic modulus (G') over 20 times at elevated frequency (o = 50 rad/s) and perk up the stability of the emulsion.
The xanthan gum added emulsion indicated smaller average particle size and demonstrated 14 and 5 times slower separation compared to the emulsions without or with the addition of weighting agents respectively. Starch-xanthan stabilized emulsion and associated water phase at 1.5:1 surface active gum to oil ratio demonstrated viscoelastic behavior (G' ≥ G") with lower droplets coalescence and creaming rates, 0.013 nm/day and 0.02 percent backscattering/day respectively. Conversely, arabic-xanthan stabilized emulsion at 1:1 gum to oil ratio showed the highest rate of droplets coalescence at 0.057 rim/day and greater degree of creaming at 0.61 percent transmission/day. While creaming were associated with arabic gum stabilized emulsions, after 3 month storage, modified starch illustrated appropriate shelf stability with no sign of creaming in orange juice drink.
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Eleftheriadou, Mary. "Factors affecting quality, safety and consumer acceptance of freshly squeezed orange juice (FSOJ)". Thesis, University of Lincoln, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312888.
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Fayoux, Stéphane C. "Interactions between plasticised PVC films and citrus juice components". Thesis, View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/35863.
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The study presented here consists in an original piece of work to better understand complex food packaging interactions. The majority of investigations on food polymer interactions related to orange juice and this provided a good base to our study (Literature reviews: cf. Chapters 1a and b). Additionally a rather remarkable finding in 1994 was that limonin, a trace bitter material found in some varieties of orange juice was rapidly absorbed by highly plasticised polyvinyl chloride (PVC plastisol) (Chapter 2). Several commercial absorbants are available for debittering, relying on limonin absorption on the large surface area of the highly porous absorbant pellets. However, the absorptive properties of the smooth plastisols apparently relied on a different mechanism. Limonin is a very large (470.5 g/mol) compound, but some preliminary experiments with another much smaller orange juice constituent d- of absorbates in plastisols, methods used earlier (Moisan 1980, Holland and Santangelo 1988) to measure solubilities and diffusion constants in packaging films could be advantageously used to survey these properties in a wide range of materials, including model compounds of various types, and a number of compounds which may be found in citrus juices (Chapters 3, 4 and 5). Experimentally, the method found most suitable was to use a ‘test film’ of pure
plastisol which was wrapped tightly on both sides by a similar ‘supply film’ blended with 1 Molar test material (also called ‘absorbate’), setting up a concentration gradient. The inner test film was removed at regular intervals (minutes to hours) to measure (mainly by weighing) the uptake of the test reagent with time. Rather unexpectedly, it was found in a number of cases that the test film lost weight, either from the beginning, or after a period of time. Three main types of behaviour were identified: Type A lost weight from the beginning and over a long period of time, Type B gained weight initially and then lost weight, and Type C gained weight until a steady state was reached. Often the maximum, or near maximum, mass increase occurred within around 100 minutes, indicating a very rapid, liquid-like diffusion mechanism, in harmony with the rapid uptake of d-limonene and limonin. The major parameters of interest with these compounds are their diffusion rates and their solubilities, and in the presence of aqueous media (orange juice and other foodstuffs) the partition coefficient between the plastisol and water, which is related to the hydrophobicity function LogP for the compound. The major complicating factor in these measurements is the observation that the plasticiser materials themselves also migrate, in the reverse direction, because of the lower effective concentration in the supply film. This effect tends to be small, but is one explanation for the mass loss observed above, and cannot be ignored over the long
term, nor in its practical applications to contamination in foods. There are many possible applications for the techniques described above. The removal or addition of compounds in food packaging itself is one. Upgrading foods, such as orange juice, commercially, is another. In many cases ‘scalping’ off-flavours or other minor components takes place exclusively through solid or liquid contact with the packaging. The removal from the headspace measured by the current gas permeation methods is irrelevant for the vast numbers of involatile, but easily diffusable compounds. For such compounds these novel applications are simple and rapid, require little specialised equipment, and fill a niche in the armoury of food and packaging chemists.
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Bergamim, Simone Canuto [UNESP]. "Avaliação de atividade antioxidante e da resposta glicêmica e insulínica do suco de laranja fresco em comparação ao suco de laranja pasteurizado no soro sanguíneo de indivíduos saudáveis". Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/88521.
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bergamim_sc_me_arafcf.pdf: 303009 bytes, checksum: 900af70efbfff14579abe01fa9983d5d (MD5)Universidade Estadual Paulista (UNESP)
O suco de laranja é fonte de vários tipos de compostos bioativos relacionados a benefícios à saúde e a atividade antioxidante deriva não somente da vitamina C, um dos principais nutrientes do suco de laranja, mas também dos flavonoides cítricos, denominados flavanonas. O presente estudo teve como objetivo avaliar o estresse oxidativo e a resposta glicêmica e insulínica em indivíduos adultos saudáveis submetidos a uma dose única de suco de laranja fresco em comparação ao suco de laranja pasteurizado. Participaram do estudo 21 voluntários que foram submetidos a duas colheitas de sangue, a primeira após ingestão de suco de laranja fresco, e a segunda depois de um intervalo de 30 dias, após a ingestão de suco de laranja pasteurizado. Foram realizadas dosagem das variáveis bioquímicas: triglicérides (TG), colesterol total (CT), colesterol de LDL (LDL-C), colesterol de HDL (HDL-C), glicemia de jejum e insulina de jejum. Para determinar o estresse oxidativo no soro dos pacientes foram realizados os ensaios de TBARS e DPPH, antes e após o consumo de cada suco de laranja. Após a ingestão de suco de laranja fresco, houve diminuição nos níveis de colesterol total, efeito não observado após a ingestão do suco de laranja pasteurizado. Os níveis da glicose sanguínea se mantiveram dentro da normalidade após à ingestão dos sucos de laranja, fresco e pasteurizado enquanto os níveis de insulina aumentaram após a ingestão do suco pasteurizado em relação ao suco fresco. A capacidade antioxidante apresentou diferença significativa nos períodos pré e pós a ingestão de suco de laranja fresco, com redução da porcentagem do radical DPPH no soro dos indivíduos, entretanto tal diferença não foi significativa para a ingestão do suco de laranja...
The orange juice is a source of various types of bioactive compounds. The orange juice's antioxidant activity, related to health benefits, derive not only from vitamin C, one of the main nutrients of orange juice, but also of flavonoids citrus, called flavanones. The present study aimed to evaluate the oxidative stress and glycemic and insulinic response in normal adult individuals subjected to a single dose of fresh orange juice compared to pasteurized orange juice. Twenty one volunteers that participated in the study were subjected to two samples of blood, the first after ingestion of fresh orange juice, and the second after an interval of 30 days after ingestion of pasteurized orange juice. Dosage of biochemical variables were carried out: triglycerides (TG), total cholesterol (TC) and LDL cholesterol (LDL-C), HDL cholesterol (HDL-C), reason LDH/HDL, fasting plasma glucose and insulin of fasting. To determine oxidative stress in individuals' serum tests were performed and TBARS, DPPH before and after the consumption of each orange juice. After 24h from ingestion of fresh orange juice, there was decrease in total cholesterol level, non-observed after ingestion of pasteurized orange juice. Glucose levels have remained within normal after ingestion of orange juices, fresh and pasteurized. Increased insulin levels after ingestion of pasteurized juice on fresh juice. The antioxidant capacity presented significant difference in pre and post ingestion of fresh orange juice, with a reduction of the percentage of DPPH radical in serum of individuals, however this difference was not significant to the ingestion of pasteurized orange juice. There was no statistically significant difference in levels of TBARS, 24 h... (Complete abstract click electronic access below)
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Fayoux, Stéphane C. "Interactions between plasticised PVC films and citrus juice components". View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/35863.
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Thesis (Ph.D.) -- University of Western Sydney, 2004.A thesis presented to the University of Western Sydney, Centre for Advanced Food Research, in fulfilment of the requirements for the degree of Doctor of Philosophy in Advanced Food Science (& Food Packaging Science). Includes bibliography.
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Love, Leigh Ann. "The diet culture phenomenon and its effect on the United States orange juice industry". [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011377.
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Mitchell, Karen K. "Castor oil and orange juice how John H. Johnson fed news to black America /". Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4970.
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Thesis (M.A.)--University of Missouri-Columbia, 2007.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 1, 2008) Includes bibliographical references.
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Yuce, Ozlem. "Application Of High Dynamic Microfluidization To Improve Some Quality Parameters And Stability Of Orange Juice". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613495/index.pdf.
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The aim of current research is to analyze the effect of microfluidization on the stability and some quality characteristics of orange juice with respect to treatment pressure and cycle. Orange juice was microfluidized with four different pressures (34, 69, 103 and 138 MPa) and three different cycles (1, 2 and 3) at 18 ±2 0C. Physical and chemical properties of microfluidized juices were compared with non-microfluidized freshly squeezed orange juice. Microfluidization made orange juice brighter and decreased redness and yellowness. There was a huge difference between non-microfluidized juice and microfluidized juice in terms of particle size. Microfluidization decreased the volume weighted mean (VWM) of orange juice between 90 % and 97 %. The results of total phenol content and antioxidant activity experiments showed that treatment pressure affected them positively
however cycle had not a significant effect on total phenol content and antioxidant property of orange juice (p<
0.05). Our current research also includes effect of microfluidization on stability of orange juice. The broken down of aggregated structure and reduction in particle size due to treatment were observed by the scanning electron and light microscopes. Therefore, it was observed that treated orange juice could be homogeneous and opaque for 14 days at 4 0C. Cloud stability of juice showed that both pressure and cycle had important effect on the cloud stability (p<
0.05). Microfluidization made the juice very stable but increase in pressure and cycle resulted in less stable juice. It was also measured that pectin methyl esterase activity was increased due to treatment of microfluidization.
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Roowi, Suri. "Tropical citrus antioxidants and catabolism of phenolics in green tea, coffee, cocoa and orange juice". Thesis, Connect to e-thesis to view abstract. Move to record for print version, 2008. http://theses.gla.ac.uk/197/.
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Thesis (Ph.D.) - University of Glasgow, 2008.Ph.D. thesis submitted to the Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, 2008. Includes bibliographical references. Print version also available.
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Coelho, Alba Lucia Andrade 1960. "Viabilidade técnica e econômica do aproveitamento para consumo humano da água evaporada na industrialização de suco de laranja concentrado". [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256792.
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Orientador: José Euclides Stipp PaternianiTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola
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Resumo: Além do suco de laranja concentrado congelado, as indústrias do setor produzem vários subprodutos. A água evaporada é produzida na etapa de concentração do suco, sendo separada por condensação no próprio evaporador. Essa água evaporada é totalmente aproveitada pelas próprias indústrias em várias operações, porém de forma pouco nobre. Considerando que se trata de produto oriundo da própria fruta, o presente trabalho teve como proposta o seu aproveitamento para comercialização na forma de "água da fruta" envasada para consumo humano, avaliando ainda a viabilidade econômica dessa forma de aproveitamento. Também foi proposta uma tecnologia para tratamento dos efluentes líquidos das indústrias cítricas, permitindo sua recirculação. Para avaliar a viabilidade técnica e econômica do aproveitamento para consumo humano, de parte da água evaporada durante a produção de sucos cítricos concentrados, foram realizadas as etapas de caracterização da água evaporada de suco de laranja, identificando os parâmetros que necessitavam correção (cor e turbidez), adotando padrão brasileiro para água envasada para consumo humano como referência. Em seguida, foi identificada tecnologia para adequar os parâmetros de qualidade da água evaporada, para alcançar padrões para consumo humano, envolvendo filtração em carvão ativado, ultrafiltração (membrana Celulose 30 KDa) e desinfecção por ultravioleta. O produto obtido foi então caracterizado por análises de substâncias inorgânicas e orgânicas, agrotóxicos, propriedades físicas e perfil de voláteis, se enquadrando no padrão brasileiro para águas minerais e mineralizadas, comprovando assim, a viabilidade técnica do aproveitamento para consumo humano. Quanto à análise sensorial, a aceitação foi de cerca de 50%, quando a água de laranja foi produzida a partir de água evaporada de suco de laranja concentrado em final de safra. Por outro lado, foram observadas tendências de aceitação superior a 90% quando o produto foi processado a partir de fruta de pico de safra. Para avaliar a viabilidade econômica, foi elaborado anteprojeto de instalação industrial hipotética para produção de 1.000 litros/hora de água de laranja envasada. O ponto de equilíbrio obtido com a estrutura de custos e receitas recomendou uma utilização da capacidade produtiva superior a 57,04% e revelou possibilidade de sucesso devido à significativa taxa interna de retorno de 28,30% ao ano e um tempo de recuperação do capital ao redor de 3,5 anos. Quanto ao tratamento de efluentes da indústria cítrica visando reuso potável, a estimativa realizada apontou que os recursos gerados pela unidade industrial de produção de água de laranja não são suficientes para implantar e operar uma estação de tratamento de efluentes no cenário atual, se membrana MBR for utilizada, podendo contribuir apenas parcialmente para tal implantação
Abstract: Besides the frozen concentrated orange juice, industry sector produce several byproducts. The evaporated water is produced in the juice concentration step, being separated by condensation in the evaporator itself. This evaporated water is fully exploited by the industries themselves in various operations, but so little noble. Whereas it is a product from the fruit itself, the present study proposed its use for marketing in the form of "fruit water" bottled for human consumption, still assessing the economic viability of this form of exploitation. It was also proposed a wastewater treatment for citrus industries, allowing their reuse and its costs estimated. To evaluate the technical and economic viability of utilization for human consumption of the water evaporated during the production of citrus juice concentrates, the following steps took place: characterization of evaporated water orange juice, identifying parameters that needed correction (color and turbidity), adopting the Brazilian standards for bottled water for human consumption as a reference. Then, a technology was identified to match the quality parameters of the evaporated water, to achieve standards for human consumption, involving activated carbon filtration, ultra filtration (30 kDa cellulose membranes) and ultraviolet disinfection. The product was then characterized by analysis of inorganic and organic substances, pesticides, physical properties and volatiles profile. The technical viability of "orange water" was proved by the results obtained. As for the sensory analysis, the acceptance was about 50%, when the "orange water" was produced from evaporated water from concentrated orange juice at the end of harvest. Furthermore, acceptance trends observed were above 90% when the product was processed from fruit crop peak. To evaluate the economic feasibility, it was prepared a hypothetical industrial facility draft for production of 1000 liters / hour of bottled orange water. The equilibrium point achieved with the costs and revenues recommended a capacity utilization of more than 57.04%; the chance of success was revealed due to significant internal rate of return of 28.30% per year and a capital recovery time around 3.5 years. About the citrus industry wastewater treatment aiming reuse, the performed estimation showed that the resources generated by the orange water producing plant are not enough to deploy and operate a wastewater treatment plant in the current scenario, if MBR membrane is used, but it may contribute only partially for such deployment
Doutorado
Agua e Solo
Doutora em Engenharia Agrícola
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Min, Seacheol. "Extending Shelf Life of Juice Products by Pulsed Electric Fields". The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1046317424.
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Bergamim, Simone Canuto. "Avaliação de atividade antioxidante e da resposta glicêmica e insulínica do suco de laranja fresco em comparação ao suco de laranja pasteurizado no soro sanguíneo de indivíduos saudáveis /". Araraquara : [s.n.], 2012. http://hdl.handle.net/11449/88521.
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Orientador: Thais Borges CésarBanca: Antonio José Goulart
Banca: Fernanda Lopes Kinouchi
Resumo: O suco de laranja é fonte de vários tipos de compostos bioativos relacionados a benefícios à saúde e a atividade antioxidante deriva não somente da vitamina C, um dos principais nutrientes do suco de laranja, mas também dos flavonoides cítricos, denominados flavanonas. O presente estudo teve como objetivo avaliar o estresse oxidativo e a resposta glicêmica e insulínica em indivíduos adultos saudáveis submetidos a uma dose única de suco de laranja fresco em comparação ao suco de laranja pasteurizado. Participaram do estudo 21 voluntários que foram submetidos a duas colheitas de sangue, a primeira após ingestão de suco de laranja fresco, e a segunda depois de um intervalo de 30 dias, após a ingestão de suco de laranja pasteurizado. Foram realizadas dosagem das variáveis bioquímicas: triglicérides (TG), colesterol total (CT), colesterol de LDL (LDL-C), colesterol de HDL (HDL-C), glicemia de jejum e insulina de jejum. Para determinar o estresse oxidativo no soro dos pacientes foram realizados os ensaios de TBARS e DPPH, antes e após o consumo de cada suco de laranja. Após a ingestão de suco de laranja fresco, houve diminuição nos níveis de colesterol total, efeito não observado após a ingestão do suco de laranja pasteurizado. Os níveis da glicose sanguínea se mantiveram dentro da normalidade após à ingestão dos sucos de laranja, fresco e pasteurizado enquanto os níveis de insulina aumentaram após a ingestão do suco pasteurizado em relação ao suco fresco. A capacidade antioxidante apresentou diferença significativa nos períodos pré e pós a ingestão de suco de laranja fresco, com redução da porcentagem do radical DPPH no soro dos indivíduos, entretanto tal diferença não foi significativa para a ingestão do suco de laranja... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The orange juice is a source of various types of bioactive compounds. The orange juice's antioxidant activity, related to health benefits, derive not only from vitamin C, one of the main nutrients of orange juice, but also of flavonoids citrus, called flavanones. The present study aimed to evaluate the oxidative stress and glycemic and insulinic response in normal adult individuals subjected to a single dose of fresh orange juice compared to pasteurized orange juice. Twenty one volunteers that participated in the study were subjected to two samples of blood, the first after ingestion of fresh orange juice, and the second after an interval of 30 days after ingestion of pasteurized orange juice. Dosage of biochemical variables were carried out: triglycerides (TG), total cholesterol (TC) and LDL cholesterol (LDL-C), HDL cholesterol (HDL-C), reason LDH/HDL, fasting plasma glucose and insulin of fasting. To determine oxidative stress in individuals' serum tests were performed and TBARS, DPPH before and after the consumption of each orange juice. After 24h from ingestion of fresh orange juice, there was decrease in total cholesterol level, non-observed after ingestion of pasteurized orange juice. Glucose levels have remained within normal after ingestion of orange juices, fresh and pasteurized. Increased insulin levels after ingestion of pasteurized juice on fresh juice. The antioxidant capacity presented significant difference in pre and post ingestion of fresh orange juice, with a reduction of the percentage of DPPH radical in serum of individuals, however this difference was not significant to the ingestion of pasteurized orange juice. There was no statistically significant difference in levels of TBARS, 24 h... (Complete abstract click electronic access below)
Mestre
30
Ogsäter, Jens. "The breakdown of ascorbic acid at different temperatures and amounts of dissolved oxygen in orange juice". Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-33004.
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Vitamin C is an essential water soluble vitamin found mainly in fruits, vegetables and their derivatives. Orange juice is a popular thirst quencher and a convenient way to reach the daily recommended intake of vitamin C. The aim of this thesis was to determine how the vitamin C content in orange juice is affected by storage temperature and oxygen content in the product. Bottles of orange juice were stored at different temperatures. Regular orange juice was compared to juice where dissolved oxygen in product water had been decreased before mixing the juice. One other aim was to determine the efficiency of a stress test room where a higher temperature was supposed to simulate longer storage time. The study showed a larger non-linear loss of vitamin C over time in the bottles stored at the higher temperatures. The samples with less dissolved oxygen showed a higher vitamin C content after five and six months of storage in room temperature. For a storage time up to one week the loss of vitamin C in the stress test does not appear to be equal to the corresponding storage time in room temperature.KeywordsOrange juice,Vitamin C är en livsnödvändig vattenlöslig vitamin som främst förekommer i grönsaker, frukter och produkter framställda från dessa. Apelsinjuice är en populär törstsläckare och ett enkelt sätt att få i sig sin dagliga dos C-vitamin. Syftet med denna rapport är att undersöka hur halten C-vitamin i apelsinjuice från Kiviks Musteri ändras beroende på lagringstemperatur och syrehalt i produktvatten. Apelsinjuice tillverkad från kranvatten jämfördes med juice tillverkad med vatten där syrehalten minskats genom kokning. Ett annat syfte var att fastställa effektiviteten för ett lagringsrum som simulerade en längre lagringsperiod genom att höja temperaturen. Resultaten visade att det var en större ickelinjär förlust av C-vitamin i flaskor som lagras vid en högre temperatur. Juiceflaskor med mindre mängd löst syre visade en lägre förlust av C-vitamin efter fem respektive sex månaders lagring i rumstemperatur. Förlusten av C-vitamin i juice lagrad en vecka i rummet med högre temperatur var ej den mängd som förutspåddes enligt företagets modell.
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Edmed, Stewart J. "A blackcurrant drink as a vehicle for supplying vitamin C compared with orange juice and water". Thesis, University of Surrey, 1999. http://epubs.surrey.ac.uk/2092/.
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Boff, Jeffrey M. "Study of volatile compound formation in oxidized lipids and volatile compound retention in processed orange juice". The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1054660479.
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Ferrarezi, Alessandra Carvalho. "Interpretação do consumidor, avaliação da intenção de compra e das características físico-químicas do néctar e do suco de laranja pronto para beber /". Araraquara : [s.n.], 2008. http://hdl.handle.net/11449/88342.
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Resumo: Este trabalho teve como objetivo avaliar o néctar e o suco de laranja pronto para beber e sua rotulagem, com base na legislação vigente e na interpretação do consumidor. Foi realizada uma avaliação crítica da legislação brasileira de sucos, com ênfase no suco de fruta pronto para beber, visando compreender suas exigências com relação ao suco de laranja e à rotulagem. A adequação dos rótulos das principais marcas de néctar e de suco de laranja pronto para beber disponíveis em supermercados à legislação vigente foi avaliada, assim como suas características físico-químicas. O uso e a interpretação das informações constantes nos rótulos pelos consumidores e sua influência na decisão de compra foram avaliados por meio de entrevista em supermercados. A influência das informações do rótulo sobre a intenção de compra do consumidor foi estudada usando a análise conjunta de fatores. De acordo com os resultados foi verificado que existem lacunas na legislação brasileira de sucos que favorecem a interpretação equivocada e a presença de sucos não regulamentados no mercado, e que mudanças freqüentes e diferentes informações em legislações de rotulagem concomitantemente vigentes também podem levar à interpretação equivocada pelo consumidor. Verificou-se que as datas de fabricação e de validade foram as informações do rótulo mais consultadas pelos entrevistados e os fatores mais importantes para a decisão de compra do produto foram marca, preço e sabor. As expressões néctar, suco integral e natural ou 100% natural foram interpretadas de maneira positiva pelos consumidores, enquanto a expressão suco reconstituído foi interpretada negativamente. Os rótulos das marcas de néctar e suco de laranja pronto para beber analisadas atenderam à legislação de sucos e bebidas, à legislação... (Resumo completo, clicara cesso eletrônico abaixo)Abstract: The aim of this work was to evaluate the ready to drink nectar and orange juice and the label, with basis of Brazilian labeling regulations and the consumer interpretation. A critical evaluation of fruit juice Brazilian regulations, with emphasis on ready to drink fruit juice, was carried out to understand the requirements related to orange juice and labeling. The suitability of labels from the main brands of commercially available ready to drink orange juice to the Brazilian regulations was evaluated, as well as the physicochemical characteristics. The consumer interpretation and use for labeling information and their influence on the decision of purchase were evaluated by interviews at supermarkets. The influence of labeling information on the purchase intention of the consumers, using conjoint analysis was also studied. The results showed that there are some gaps in fruit juice Brazilian regulations that allow mistaken understanding and inclusion of not regulated juices in the market, and that frequent changes and different information in the Brazilian labeling regulations in force at the same time also can take to mistaken understanding. The interpretation of the consumers pointed out that date of manufacture and shelf life were the most important information on the label and brand, price and flavor were the most important factors for purchasing. The interpretation of the consumers of ready to drink orange juice about the expressions nectar, whole and natural juice or 100% natural was positive, while that from the expression reconstituted juice was negative. Labels from all the brands of ready to drink nectar and orange juice were in accordance with the fruit juice and beverage Brazilian regulations, the food packaged labeling Brazilian regulations, the complementary nutritional information regulations and the presence or absence... (Complete abstract click electronic access below)
Orientador: Magali Monteiro da Silva
Coorientador: Karina Olbrich dos Santos
Banca: Valéria Paula Rodrigues Minim
Banca: Natalia Soares Janzantti
Mestre
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Whitney, Brooke Meredith. "Efficacy of high pressure processing in combination with chemical preservatives for the reduction of Escherichia coli O157:H7 and Salmonella in apple juice and orange juice". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33853.
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The effect of pressure on the log reduction of six strains of E. coli O157:H7 and five serovars of Salmonella enterica were investigated in tryptic soy broth, sterile distilled water and commercially sterile orange and apple juice. Samples were subjected to high hydrostatic pressure (HHP) at 300 and 550 MPa for 2 minutes at 6°C, and then held for 24 hours at 4°C following treatment. E. coli O157:H7 strain E009 was the most pressure resistant, having a decrease of only 0.77 log10 CFU/ml directly after pressurization in TSB. S. Agona was the most pressure resistant Salmonella serovar tested with a decrease of 3.79 log¬10 CFU/ml in TSB at 550 MPa. The two most pressure resistant cultures were then used in a subsequent study using HHP in conjunction with antimicrobials (dimethyl dicarbonate [DMDC] at 62.5 and 125 ppm, hydrogen peroxide at 150 and 300 ppm, cinnamic acid, potassium salt at 125 and 250 ppm, potassium sorbate [KS] at 500 and 1000 ppm and sodium benzoate [NaB] at 500 and 1000). For both E. coli O157:H7 and Salmonella, the most effective antimicrobial was DMDC having a 5.79 and 5.96 log10 CFU/ml decrease directly following pressurization, respectively. Other treatments that were significantly different from the samples treated with no antimicrobial were hydrogen peroxide, and NaB at 500 ppm for E. coli O157:H7 and a treatment of NaB at 1000 ppm for S. Agona. After 24 hours at 4°C, S. Agona samples with added antimicrobials had a close to or above 5-log10 CFU/ml reduction. DMDC should be further investigated as an antimicrobial agent that can work in conjunction with HHP.Master of Science
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Almeida, Selma Bergara 1970. "Efeito de diferentes aromas citricos sobre a qualidade e estabilidade sensoriais de suco de laranja pronto para beber". [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254951.
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Orientador: Maria Aparecida A. P. da SilvaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Resumo: Para a recuperação do aroma e sabor de fruta fresca ao suco industrializado, subprodutos do processamento do suco de laranja, como óleo essencial e essências aquosa e oleosa, são normalmente reincorporados ao produto processado. A adição de cada um desses subprodutos confere ao produto final qualidade e estabilidade sensoriais distintas. O presente trabalho teve por objetivo avaliar a qualidade e estabilidade sensoriais do suco de laranja reconstituído, produzido com laranjas de variedades brasileiras e aromatizado com quatro diferentes aromas naturais de laranja, quais sejam: I - óleo essencial; II - frações destiladas de essência oleosa (oil phase); III - aroma formulado contendo frações destiladas de óleo essencial e de essência oleosa; e, IV - aroma formulado contendo frações destiladas de óleo essencial, frações destiladas de essência oleosa e de essência aquosa (water phase). Assim, esta pesquisa consistiu em quatro etapas, a saber: avaliação do impacto dos quatro aromas naturais sobre a aceitação e perfil sensorial do suco de laranja pronto para beber em condições pré-processamento térmico; avaliação da estabilidade sensorial dos aromas naturais ao processamento térmico do suco; avaliação do impacto dos aromas naturais sobre a estabilidade sensorial do suco pronto para beber durante o armazenamento da bebida e, finalmente, a identificação de compostos voláteis odoríferos presentes em um dos aromas mais estáveis - Aroma III. Quatro formulações de suco de laranja reconstituído foram elaboradas, adicionando-se os aromas I, II, III e IV, processadas e envasadas assepticamente em garrafas PET. Os perfis sensoriais, através de Análise Descritiva Quantitativa, e a aceitação das quatro formulações de suco de laranja pronto para beber foram avaliados antes e após o processamento térmico, bem como durante o armazenamento da bebida por 20, 40, 60 e 90 dias. Índices de escurecimento e teores de vitamina C foram determinados durante o armazenamento. Adicionalmente, amostras comerciais de suco de laranja pronto para beber foram avaliadas. Os dados foram analisados por ANOVA, teste de média Tukey ou t-Student, Mapa de Preferência, Análise de Componentes Principais, análise de correlação de Pearson e análise de regressão linear dos parâmetros sensoriais em função do tempo de armazenamento da bebida. O aroma III foi avaliado por cromatografia gasosa (CG), CG-olfatometria (Osme) e espectrometria de massas. Os resultados obtidos na primeira etapa da pesquisa sugeriram que a reincorporação dos compostos voláteis provenientes da essência oleosa contribuem menos para aumentar a aceitação do suco de laranja do que aqueles provenientes do óleo essencial. Em contrapartida, as amostras comerciais tiveram aceitação modesta entre os consumidores indicando que, no Brasil, os sucos de laranja comerciais podem ainda ter sua qualidade sensorial melhorada pela adição de novos aromas naturais. Na segunda etapa, a avaliação da aceitação das amostras pré e pós-processamento indicou boa estabilidade dos aromas naturais estudados ao processamento térmico. Os perfis sensoriais das formulações sugeriram que: i) a reincorporação ao suco de frações destiladas dos três subprodutos do processamento da laranja, resulta em maior estabilidade térmica do que aromas derivados apenas do óleo essencial; e, ii) a presença de voláteis provenientes da essência aquosa no aroma natural de laranja, mesmo que em proporções minoritárias, realça no suco notas de sabor de suco natural e suaviza as notas de aroma e sabor de casca de laranja. Na terceira etapa, durante o armazenamento da bebida, a formulação contendo apenas frações de essência oleosa apresentou, notadamente, menor estabilidade sensorial do que as demais formulações, contendo compostos voláteis provenientes do óleo essencial. Possivelmente essa ocorrência seja devida à presença de agentes antioxidantes naturais nas frações derivadas do óleo essencial. Adicionalmente, os resultados sugeriram que a adição ao suco de laranja de frações destiladas de óleo essencial resulta em melhor estabilidade sensorial à bebida do que a adição ao suco do óleo essencial na sua forma integral. Em todas as amostras, ao longo do período de armazenamento, ocorreu queda dos teores de vitamina C e concomitante escurecimento dos sucos. Finalmente, na última etapa, foram gerados 55 picos de odores, os quais apresentaram, predominantemente, notas de aroma associadas à laranja. Beta-mirceno, butanoato de etila, a-pineno, hexanal, citral e decanol foram os compostos voláteis de maior importância odorífera identificados. Os compostos ß-terpineol, citronelal, undecanal, acetato de a-terpenila, acetato de nerila e a-cariofileno foram identificados como compostos de alto poder odorífero e, limoneno, linalol, a-terpineol e decanal, como compostos de baixo poder odorífero
Abstract: To restore the natural orange aroma and flavor to industrialized juices, processors add natural flavorings obtained from three orange juice by-products: the cold-pressed oil, the oil phase and the water phase. The addition of each of these by-products results in juices with distinct sensory characteristics and acceptability. The present work aimed at evaluating the sensory quality and stability of reconstituted orange juice from Brazilian varieties, flavored with four different orange natural aromas, which are: I ¿ essential oil; II ¿ distilled fractions of the oil phase; III - formulated aroma containing distilled fractions of the essential oil and of the oil phase e, IV ¿ formulated aroma containing distilled fractions of the essential oil, distilled fractions of the oil phase and of the water phase. Thus the present research was divided into four stages: evaluation of the impact of four natural aromas (I, II, III, IV) on the acceptability and sensory profile of ready-todrink orange juice before thermal treatment; evaluation of the sensory stability of the natural aromas to the thermal treatment of the juice; evaluation of the natural aromas impact to the sensory stability of ready-to-drink orange juice during storage; the identification of odor volatiles compounds in one of the most stable aromas ¿ Aroma III. Four reconstituted orange juices formulations were elaborated, by adding the above mentioned flavorings (I, II, III, IV), processed and packed in PET bottles. The sensory profiles, by using Quantitative Descriptive Analysis, and the acceptability of the four ready-to-drink orange juices were evaluated before and after the processing, and also during their 20, 40, 60 and 90 day-storage. In addition, other commercial samples of ready-to-drink orange juice were included in this study. Determinations of the ascorbic acid and the browning index of formulated juices were done as well. Data were analyzed by ANOVA, Tukey or t-Student mean test, Principal Component Analysis, Preference Mapping, Pearson¿s correlation analysis and linear regression analysis of sensory parameters as a function of the storage time. The aroma III was evaluated by gas chromatography (GC), GC-olfactometry (OSME) and by mass spectrometry. The results obtained from the first research stage suggested that reintroduction of the volatiles compounds from oil phase contribute less to increase the acceptability of orange juice than those from the essential oil. On the other hand, all the commercial samples presented moderate acceptability by consumers, indicating that the commercial orange juices in Brazil may have their sensory quality improved by adding new natural aromas. In the second research stage, the evaluation of the pre and post-processing samples acceptability indicated that the studied natural aromas presented good stability to the thermal treatment. The formulations sensory profiles suggested that: i) the reintroduction of the distilled fractions of the three orange processing by-products to the juice results in higher thermal stability than that caused by the aromas derived from the essential oil; ii) the presence of volatiles from distilled fractions of the water phase in the natural orange aroma, although in very small proportions, enhances natural juice flavor and softens orange peel flavor and aroma. In the third research stage, during the drink storage the formulation containing only distilled fractions of the oil phase presented much less sensory stability than the other formulations, containing volatile compounds from the essential oil. A possible explanation for this occurrence is the presence of natural antioxidants in those fractions derived from essential oil. Further, the results suggested that the addition of distilled fractions of essential oil to orange juice provides better sensory stability to the drink than the addition of the integral essential oil. During storage all samples showed decrease in vitamin C and simultaneous browning of juices. Finally, in the last research stage, Fifty-five odor peaks were generated, which presented aroma notes associated mostly to orange. Beta-myrcene, ethyl butanoate, a-pinene, hexanal, citral and decanol were identified as the highest aroma impact compounds. The compounds ß-terpineol, citronellal, undecanal, a-terpinyl acetate, neryl acetate and a-cariophylene were identified as high odor power compounds and, limonene, linalool, a-terpineol and decanal, as low odor power compounds
Doutorado
Doutor em Tecnologia de Alimentos
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Miranda, Ackerman Marco Augusto. "Multi-objective optimization for Green Supply Chain Management and Design : Application to the orange juice agrofood cluster". Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/15550/1/Miranda_Ackerman.pdf.
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Supply chain and operations management has matured from a field that addressed only operational and economic concerns to one that comprehensively considers the broader environmental and social issues that face industrial organizations of today. Adding the term “green” to supply chain activities seeks to incorporate environmentally conscious thinking in all processes in the supply chain. The aim of this work is to develop a Green Supply Chain (GrSC) framework based on a multi-objective optimization approach, with specific emphasis on agrofood supply chain design, planning and operations through the implementation of appropriate green supply chain management and logistics principles. The case study is the orange juice cluster. The research objective is the minimization of the environmental burden and the maximization of economic profitability of the selected product categories. This work focuses on the application of GrSCM to two fundamental strategic issues targeting agro food supply chains. The former is related to the Green Supplier Selection (GSS) problem devoted to the farming production systems and the way they are integrated into the global supply chain network. The latter focuses on the global Green Supply Chain Network Design (GSCND) as a whole. These two complementary and ultimately integrated strategic topics are framed in order to evaluate and exploit the unique characteristics of agro food supply chains in relation to eco-labeling. The methodology is based on the use of Life Cycle Assessment, Multi-objective Optimization via Genetic Algorithms and Multiple-criteria Decision Making tools (TOPSIS type). The approach is illustrated and validated through the development and analysis of an Orange Juice Supply Chain case study modelled as a three echelon GrSC composed of the supplier, manufacturing and market levels that in turn are decomposed into more detailed subcomponents. Methodologically, the work has shown the development of the modelling and optimization GrSCM framework is useful in the context of eco-labeled agro food supply chain and feasible in particular for the orange juice cluster. The proposed framework can help decision makers handle the complexity that characterizes agro food supply chain design decision and that is brought on by the multi-objective and multi-period nature of the problem as well as by the multiple stakeholders, thus preventing to make the decision in a segmented empirical manner. Experimentally, under the assumptions used in the case study, the work highlights that by focusing only on the “organic” eco-label to improve the agricultural aspect, low to no improvement on overall supply chain environmental performance is reached in relative terms. In contrast, the environmental criteria resulting from a full lifecycle approach is a better option for future public and private policies to reach more sustainable agro food supply chains.
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Dede, Saner. "Effect Of High Hydrostatic Pressure (hhp) On Some Quality Paraeters And Shelf-life Of Fruit And Vegetable Juices". Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606513/index.pdf.
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The quality and shelf-life of pressure processed (150, 200 and 250 MPa at 25 and 35°C for 5, 10 and 15 minutes) orange, tomato and carrot juices were compared to fresh and thermally pasteurised (60°
C for 5, 10 and 15 minutes and 80°
C for 1 minute) juices. Treatments were capable of microbial inhibition of juices to non-detectable levels. The change in ascorbic acid content of HHP treated juices was not statistically significant (p>
0.05). Both heat treatments at 60 and 80°
C, displayed a significant loss and induced a decrease in the free radical scavenging activity but was not affected by HHP treatments. Pressurization at 250 MPa at 35°
C for 15 minutes and thermal pasteurization at 80°
C for 1 minute and stored at 4 and 25°
C for shelf-life analysis. HHP treated juices showed a small loss of antioxidants (below 10%) at both storage temperatures whereas the loss is higher (about 30%) in the heat treated juices through shelf life (30 days). The pressurized juices, stored at 25°
C, contained ascorbic acid better than heat treated ones after 30 days. The total color changes were minor (&
#8710
E=10) for all pressurized juices but for heat pasteurized samples, higher as a result of insufficient antioxidant activity. The pH of juices was not affected by treatment, storage temperature or time. HHP yielded a better product, regarding the studied parameters of the juices compared to the conventional pasteurization. Therefore, HHP treatment (250 MPa, 35°
C for 15 minutes) can be recommended for industrial production of fresh fruit and vegetables.
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Nelson, Kristin Ann. "Photochemically induced flavor changes in orange juice exposed to light in glass and polyethylene terephthalate at 4°C". [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010289.
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Ferrarezi, Alessandra Carvalho [UNESP]. "Interpretação do consumidor, avaliação da intenção de compra e das características físico-químicas do néctar e do suco de laranja pronto para beber". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/88342.
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Universidade Estadual Paulista (UNESP)
Este trabalho teve como objetivo avaliar o néctar e o suco de laranja pronto para beber e sua rotulagem, com base na legislação vigente e na interpretação do consumidor. Foi realizada uma avaliação crítica da legislação brasileira de sucos, com ênfase no suco de fruta pronto para beber, visando compreender suas exigências com relação ao suco de laranja e à rotulagem. A adequação dos rótulos das principais marcas de néctar e de suco de laranja pronto para beber disponíveis em supermercados à legislação vigente foi avaliada, assim como suas características físico-químicas. O uso e a interpretação das informações constantes nos rótulos pelos consumidores e sua influência na decisão de compra foram avaliados por meio de entrevista em supermercados. A influência das informações do rótulo sobre a intenção de compra do consumidor foi estudada usando a análise conjunta de fatores. De acordo com os resultados foi verificado que existem lacunas na legislação brasileira de sucos que favorecem a interpretação equivocada e a presença de sucos não regulamentados no mercado, e que mudanças freqüentes e diferentes informações em legislações de rotulagem concomitantemente vigentes também podem levar à interpretação equivocada pelo consumidor. Verificou-se que as datas de fabricação e de validade foram as informações do rótulo mais consultadas pelos entrevistados e os fatores mais importantes para a decisão de compra do produto foram marca, preço e sabor. As expressões néctar, suco integral e natural ou 100% natural foram interpretadas de maneira positiva pelos consumidores, enquanto a expressão suco reconstituído foi interpretada negativamente. Os rótulos das marcas de néctar e suco de laranja pronto para beber analisadas atenderam à legislação de sucos e bebidas, à legislação...
The aim of this work was to evaluate the ready to drink nectar and orange juice and the label, with basis of Brazilian labeling regulations and the consumer interpretation. A critical evaluation of fruit juice Brazilian regulations, with emphasis on ready to drink fruit juice, was carried out to understand the requirements related to orange juice and labeling. The suitability of labels from the main brands of commercially available ready to drink orange juice to the Brazilian regulations was evaluated, as well as the physicochemical characteristics. The consumer interpretation and use for labeling information and their influence on the decision of purchase were evaluated by interviews at supermarkets. The influence of labeling information on the purchase intention of the consumers, using conjoint analysis was also studied. The results showed that there are some gaps in fruit juice Brazilian regulations that allow mistaken understanding and inclusion of not regulated juices in the market, and that frequent changes and different information in the Brazilian labeling regulations in force at the same time also can take to mistaken understanding. The interpretation of the consumers pointed out that date of manufacture and shelf life were the most important information on the label and brand, price and flavor were the most important factors for purchasing. The interpretation of the consumers of ready to drink orange juice about the expressions nectar, whole and natural juice or 100% natural was positive, while that from the expression reconstituted juice was negative. Labels from all the brands of ready to drink nectar and orange juice were in accordance with the fruit juice and beverage Brazilian regulations, the food packaged labeling Brazilian regulations, the complementary nutritional information regulations and the presence or absence... (Complete abstract click electronic access below)
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Silveira, Jacqueline Queiroz da [UNESP]. "Biodisponibilidade de flavanonas e atividade antioxidante do suco de laranja fresco versus suco de laranja pasteurizado em humanos saudáveis". Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/114027.
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As flavanonas (hesperidina e narirutina) presentes quase exclusivamente em laranjas são associadas a diversos benefícios à saúde. O objetivo deste estudo foi analisar as diferenças dos parâmetros farmacocinéticos dos metabólitos das flavanonas e a atividade antioxidante em humanos, após o consumo de dois tipos de suco de laranja: fresco e pasteurizado. O suco fresco foi extraído com o auxílio de um espremedor MJ-20 Basic e o pasteurizado (95ºC/15s) foi fornecido pela Citrosuco, Matão-SP. Ambos os sucos foram obtidos a partir de laranjas Pera Rio do mesmo lote. Participaram 12 homens e 12 mulheres saudáveis, com 27 ± 6 anos, IMC de 24 ± 3 kg/m2, não-fumantes e que não utilizavam nenhum tipo de hormônio ou suplementos dietéticos. Os voluntários ingeriram 11,5 ml/kg de peso corporal de suco de laranja fresco e, após washout de 30 dias, ingeriram a mesma quantidade de suco pasteurizado. Foi solicitado que os voluntários evitassem o consumo de alimentos cítricos nos 3 dias precedentes aos dias experimentais e as refeições do dia (café da manhã, almoço e lanche da tarde) foram fornecidas a fim de assegurar a abstenção de alimentos ricos em flavonoides. A urina foi coletada durante 24 h e o sangue foi coletado em jejum, 3, 4, 5, 6, 7, 8 e 24 h após o consumo do suco. Os metabólitos foram analisados no plasma sanguíneo e na urina por cromatografia líquida de alta performance por ionização electrospray acoplada à espectrometria de massa (HPLC-ESI-MS). A atividade antioxidante foi avaliada no soro sanguíneo por ABTS e TBARS, nos tempos: jejum, 4, 8 e 24 h. As concentrações de hesperidina e narirutina no suco de laranja comercialmente pasteurizado foram 3,2 e 6,6 vezes maiores do que no suco fresco, respectivamente, e estes compostos foram encontrados em grande parte na fração insolúvel (pellet) no suco pasteurizado, enquanto que ocorreram quase completamente na fração solúvel (sobrenadante) no suco fresco. A ...
Flavanones (hesperidin and narirutin) present almost exclusively in oranges, are associated with various health benefits. The aim of this study was to analyze the differences in the pharmacokinetic parameters of the flavanones metabolites and antioxidant activity in humans after consumption of two types of orange juice: fresh and pasteurized. Fresh orange juice (FOJ) is extracted with the aid of a squeezer MJ-20 Basic and pasteurized (95°C/ 15s) was provided by Citrosuco Matão SP. Both juices were obtained from Pera Rio oranges from the same batch. Participated 12 men and 12 healthy women, 27 ± 6 years, BMI 24 ± 3 kg/m2, and non-smokers who did not use any hormones or dietary supplements. Volunteers ingested 11.5 ml/kg body weight of fresh orange juice and after washout of 30 days, they ingested the same amount of pasteurized juice. Volunteers were asked to avoid consumption of citrus foods in the preceding three days to the experiment and meals of the day (breakfast, lunch and afternoon snack) were provided to ensure the avoidance of foods rich in flavonoids. Urine was collected during 24 h and the blood was collected from fasting, 3, 4, 5, 6, 7, 8 and 24 h after the consumption of the juice. The metabolites were analyzed in plasma and urine by high-performance liquid chromatography- electrospray ionization- mass spectrometry (HPLC-ESI-MS). The antioxidant activity was evaluated in blood serum by ABTS and TBARS, at fasting, 4, 8 and 24 h. The concentrations of hesperidin and narirutina after the ingestion of commercially pasteurized orange juice were 3.2 and 6.6 times higher than after fresh juice, respectively, and these compounds have been found largely in the insoluble fraction (pellet) in pasteurized juice, while occurred almost entirely in the soluble fraction (supernatant) in fresh juice. The urine chromatographic analysis showed concentrations of conjugated of glucuronic acid and sulfate groups of hesperetin and naringenin ...
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Tamega, Junior Wilson Pedro. "Programa para determinação de parametros cineticos em sistemas de processamento termicos continuos de alimentos". [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255412.
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Orientador: Pilar Rodriguez de MassaguerDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Mestrado
Ciência de Alimentos
Mestre em Ciência de Alimentos
42
Benassi, Junior Mario. "Avaliação da influencia do grau de maturação do fruto citrico na composição quimica e sensorial de refrigerantes, refrescos, e energeticos a base de suco de laranja". [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255535.
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Orientador: Roberto Herminio MorettiTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Resumo: Foram formuladas três tipos de bebidas cítricas: Refrigerante, Refresco e Energético, e avaliada a influência do nível de maturação do suco na qualidade final dessas formulações. O Refrigerante foi formulado com 10 % de suco, em 5 diferentes níveis de maturação, com relação Brix/Acidez (¿Ratio¿) de: 8, 10, 12, 14 e 17. Os Refrescos foram formulados com 30 % de suco, oriundo de níveis de ¿Ratio¿ 10 e 17, e com três diferentes níveis de acidez (ácido cítrico): 0,75%, 0.55%, 0,35%, gerando bebidas com níveis finais de ¿Ratio¿ de 14, 19 e 30, totalizando seis tratamentos. Os Energéticos foram formulados com 2 % de suco, em níveis de ¿Ratio¿ de 10 e 17, e três níveis de estabilizante (goma xanthana) 0,04%, 0,05% e 0,06%, totalizando seis tratamentos. Nessas bebidas, e no suco concentrado utilizado como matéria prima, foram realizadas as seguintes determinações físico-químicas: viscosidade, cor (Hunter -L, a, b), opacidade, ácido ascórbico, pH, pectina, prolina, atividade de pectinesterase, cinzas, e minerais (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Zn, Na, Al), em triplicata, além disso as bebidas foram avaliadas através de análise sensorial, composta de um teste de aceitação, com escala não estruturada de 0 a 9 (desgostei muitíssimo, gostei muitíssimo), para os atributos: aroma, acidez, sabor, doçura, viscosidade e impressão global. Tanto as análises físicvo-químicas como a sensorial foram realizadas no momento da produção para todas as bebidas, após 180 dias nos Refrigerantes, e após 120 dias nos Energéticos e Refrescos. O Refrigerante não foi influenciado pelo nível de maturação do suco, apresentando menores: viscosidade, opacidade e teor de pectina, e maiores: pH, teor de ferro e cor, dentre as bebidas, sendo a bebida com a melhor avaliação sensorial. O Refresco foi influenciado pelo nível de maturação do suco na formulação, onde os Refrescos formulados com suco de ¿Ratio¿ 10, apresentaram a menor viscosidade, a maior opacidade e o maior teor de ácido ascórbico, enquanto que os Refrescos formulados com suco de ¿Ratio¿ 17 apresentaram cor mais clara e alaranjada, e maiores teores de prolina, cinzas e minerais, mas a pior avaliação sensorial dentre as bebidas. O Energético (2% de suco) também sofreu influência da maturação com os energéticos formulados com suco de ¿Ratio¿ 10, apresentando maiores: opacidade e teor de ácido ascórbico e os Energéticos formulados com ¿Ratio¿ 17, maior teor de cinzas, sendo esses as bebidas com a maior viscosidade, menor teor de minerais, e avaliação sensorial intermediária entre Refrigerantes e Refrescos
Abstract: Three different citrus juice drinks have been prepared: a soft drink (10 % of juice), an ade (30% of juice) and a sherbet (2 % of juice), all this beverages have been evaluated considering the influence provided by the maturation level of the juice used in the formulation. The soft drink has been formulated with 10 % of orange juice in five different levels of Brix/acid ratio of 8, 10, 12, 14 and 17. The orange ades have been formulated with 30 % of orange juice in two leves of brix/acid ratio: 10 and 17, and three different levels of acidity (citric acid): 0.75%, 0.55% and 0.25%, producing beverages with final brix/acid ratio of 14, 19 and 30. The sherbets have been formulated with 2 % of orange juice with two levels of brix/acid ratio 10 and 17, and three levels of texturizers (Xanthan gum): 0.04%, 0.05% and 0.06%. All this beverages, have been submitted to the folowing physicochemical determinations: viscosity, color (Hunter L, a, b), opacity, ascorbic acid, pH, total pectin, proline, pectin esterase activity, ashes and mineral content (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Zn, Na, Al), realized in three repetitions. Besides that, a sensory evaluation was carried out in a acceptance test with a non-structured category scale form 0 to 9 (dislike extremely, like extremely), considering the following atributtes: flavor, acidity, taste, sweetness, viscosity and global impression. Each one of this evaluations have been realized just after the processing of the beverege and 180 days after it for the soft drink and 120 days after, for both orange ade and sherbet. The soft drink had been not affected by the maturation level of the juice, instead of it showed the lowest level of viscosity, opacity, pectin, and the highest levels of pH, Iron content and color, considering all the three beverages, and still has been achieved the best sensory evaluation among the beverages. The orange ade, however has been influenced by the maturation level of the orange juice, with the ones formulated in a brix/acid ratio of 10, achieving the lowest viscosity, but the higest opacity and ascorbic acid content, while the orange ades formulated with the orange juice in a brix/acid ratio of 17, achieveing more orange and bright color and the higest: prolin, ash and mineral content, on the other hand, showing the worst sensory evaluation among the beverges. The sherbet has been influenced by the maturation level, with the ones formulated with orange juice in a brix/acid ratio of 10, achieving highest opacity and ascorbic acid and the sherbets formulated with orange juice in a brix/acid ratio of 17, presenting the highest ash content. Therefore, these sherbets reached out the highest viscosity among the beverages and have been evaluated to an intermediate position between the soft drink and the orange ade, considering the sensory test
Doutorado
Tecnologia de Alimentos
Doutor em Tecnologia de Alimentos
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Alves, Maria Rita Olivati Estevam. "Perfil de compostos fenólicos do suco de laranja integral pasteurizado comercial /". Araraquara, 2018. http://hdl.handle.net/11449/157213.
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Orientador: Magali Monteiro da SilvaBanca: Alexandre Ferreira Gomes
Banca: Marina Ansolin
Resumo: Objetivo: O objetivo desse trabalho foi avaliar o perfil de compostos fenólicos do suco de laranja integral pasteurizado de marcas comerciais. Métodos: Foram reunidas informações sobre os compostos fenólicos considerando suas características químicas, bioatividade, técnica analítica utilizada para a sua determinação, e os principais compostos presentes em citros. Sucos de laranja integral pasteurizado de nove marcas comerciais foram adquiridos em Araraquara e região, SP. Foram adquiridas três embalagens de cada marca, com diferentes prazos de validade, referentes a diferentes lotes. Sucos de cada marca e lote foram liofilizados e submetidos à extração com solução de metanol:água (90:10, v/v), e os extratos foram submetidos à limpeza em cartucho SPE C18. A separação dos compostos foi realizada no sistema HPLC-DAD, empregando coluna C18 com fase móvel de água:ácido fórmico (99,9:0,1, v/v) e acetonitrila, em modo gradiente, vazão de 1 mL.min-1, temperatura de 50 ºC e volume de injeção de 20 µL. Foi também empregado o sistema UPLC-UV/MS, com escalonamento das condições para escala sub-2 µm. Os extratos foram injetados no sistema HPLC-DAD e UPLC-UV/MS para a identificação e quantificação dos compostos fenólicos. Resultados: Os principais compostos fenólicos das frutas cítricas descritos na literatura são os flavonoides, particularmente as flavanonas narirutina e hesperidina. Nesse trabalho foram identificados 60 compostos do suco de laranja, dos quais 54 são compostos fenólicos. O... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Objective: The aim of this work was to evaluate the profile of phenolic compounds of pasteurized orange juice from commercial brands. Methods: The phenolic compounds where characterized considering chemical structure, bioactivity, and techniques for analytical determination, as well as the main compounds present in citrus. Pasteurized orange juices from nine commercial brands were purchased in Araraquara and region, SP. Three packages from each brand were acquired, with different shelf life corresponding to different lots. Juices were lyophilized and extracted with methanol:water solution (90:10, v/v), and the extracts were cleaned in C18 SPE cartridges. Separation of the compounds was performed in an HPLC-DAD system, using a C18 column with mobile phase of water:formic acid (99.9:0.1, v/v) and acetonitrile in gradient mode, with a flow rate of 1 mL.min-1, temperature of 50 ºC and injection volume of 20 μL. An UPLC-UV/MS system was also used, with scaling conditions for sub-2 μm scale. The extracts were injected into the HPLC-DAD and UPLC-UV/MS system for identification and quantification of the phenolic compounds. Results: The main phenolic compounds of citrus fruits described in the literature are flavonoids, particularly the flavanones narirutin and hesperidin. In this work 60 compounds were identified in orange juice, of which 54 are phenolic compounds. The flavonoids rutin, eriocitrin, narirutin, naringin, hesperidin, naringenin, nobiletin and tangeritin, and the caffeic, p-coumaric and ferulic acids were identified in all juices. The levels of phenolic compounds varied amongst brands and lots. The results of the PCA... (Complete abstract click electronic access below)
Mestre
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Silveira, Jacqueline Queiroz da. "Biodisponibilidade de flavanonas e atividade antioxidante do suco de laranja fresco versus suco de laranja pasteurizado em humanos saudáveis /". Araraquara, 2014. http://hdl.handle.net/11449/114027.
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Orientador : Thaïs Borges CésarBanca: Célia Maria de Sylos
Banca: Elizabeth A. Baldwin
Banca: Magali Monteiro da Silva
Banca: Neuza Mariko Aymoto Hassimotto
Resumo: As flavanonas (hesperidina e narirutina) presentes quase exclusivamente em laranjas são associadas a diversos benefícios à saúde. O objetivo deste estudo foi analisar as diferenças dos parâmetros farmacocinéticos dos metabólitos das flavanonas e a atividade antioxidante em humanos, após o consumo de dois tipos de suco de laranja: fresco e pasteurizado. O suco fresco foi extraído com o auxílio de um espremedor MJ-20 Basic e o pasteurizado (95ºC/15s) foi fornecido pela Citrosuco, Matão-SP. Ambos os sucos foram obtidos a partir de laranjas Pera Rio do mesmo lote. Participaram 12 homens e 12 mulheres saudáveis, com 27 ± 6 anos, IMC de 24 ± 3 kg/m2, não-fumantes e que não utilizavam nenhum tipo de hormônio ou suplementos dietéticos. Os voluntários ingeriram 11,5 ml/kg de peso corporal de suco de laranja fresco e, após washout de 30 dias, ingeriram a mesma quantidade de suco pasteurizado. Foi solicitado que os voluntários evitassem o consumo de alimentos cítricos nos 3 dias precedentes aos dias experimentais e as refeições do dia (café da manhã, almoço e lanche da tarde) foram fornecidas a fim de assegurar a abstenção de alimentos ricos em flavonoides. A urina foi coletada durante 24 h e o sangue foi coletado em jejum, 3, 4, 5, 6, 7, 8 e 24 h após o consumo do suco. Os metabólitos foram analisados no plasma sanguíneo e na urina por cromatografia líquida de alta performance por ionização electrospray acoplada à espectrometria de massa (HPLC-ESI-MS). A atividade antioxidante foi avaliada no soro sanguíneo por ABTS e TBARS, nos tempos: jejum, 4, 8 e 24 h. As concentrações de hesperidina e narirutina no suco de laranja comercialmente pasteurizado foram 3,2 e 6,6 vezes maiores do que no suco fresco, respectivamente, e estes compostos foram encontrados em grande parte na fração insolúvel (pellet) no suco pasteurizado, enquanto que ocorreram quase completamente na fração solúvel (sobrenadante) no suco fresco. A ...
Abstract: Flavanones (hesperidin and narirutin) present almost exclusively in oranges, are associated with various health benefits. The aim of this study was to analyze the differences in the pharmacokinetic parameters of the flavanones metabolites and antioxidant activity in humans after consumption of two types of orange juice: fresh and pasteurized. Fresh orange juice (FOJ) is extracted with the aid of a squeezer MJ-20 Basic and pasteurized (95°C/ 15s) was provided by Citrosuco Matão SP. Both juices were obtained from Pera Rio oranges from the same batch. Participated 12 men and 12 healthy women, 27 ± 6 years, BMI 24 ± 3 kg/m2, and non-smokers who did not use any hormones or dietary supplements. Volunteers ingested 11.5 ml/kg body weight of fresh orange juice and after washout of 30 days, they ingested the same amount of pasteurized juice. Volunteers were asked to avoid consumption of citrus foods in the preceding three days to the experiment and meals of the day (breakfast, lunch and afternoon snack) were provided to ensure the avoidance of foods rich in flavonoids. Urine was collected during 24 h and the blood was collected from fasting, 3, 4, 5, 6, 7, 8 and 24 h after the consumption of the juice. The metabolites were analyzed in plasma and urine by high-performance liquid chromatography- electrospray ionization- mass spectrometry (HPLC-ESI-MS). The antioxidant activity was evaluated in blood serum by ABTS and TBARS, at fasting, 4, 8 and 24 h. The concentrations of hesperidin and narirutina after the ingestion of commercially pasteurized orange juice were 3.2 and 6.6 times higher than after fresh juice, respectively, and these compounds have been found largely in the insoluble fraction (pellet) in pasteurized juice, while occurred almost entirely in the soluble fraction (supernatant) in fresh juice. The urine chromatographic analysis showed concentrations of conjugated of glucuronic acid and sulfate groups of hesperetin and naringenin ...
Doutor
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Bisconsin, Junior Antonio [UNESP]. "Impacto da tecnologia de alta pressão hidrostática sobre a qualidade do suco de laranja". Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/88331.
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bisconsinjunior_a_me_arafcf.pdf: 1529598 bytes, checksum: 0af6066a32d281a638b3359c7de9882d (MD5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O suco de laranja é o suco de fruta mais popular e mais consumido em todo mundo. O Brasil é o maior produtor e exportador mundial de suco de laranja. O consumo de suco de laranja é estimado em mais de 9 bilhões de litros por ano, representando 47% do consumo mundial de suco. A fim de aumentar a vida de prateleira e a estabilidade do suco de laranja, a tecnologia de alta pressão hidrostática (APH) pode ser utilizada como um método alternativo à pasteurização. Este trabalho teve como objetivo otimizar as condições de processamento do suco de laranja da variedade Pêra Rio por APH, pressão (100- 600 MPa), temperatura (30-60 °C) e tempo (30-360 s), avaliar o efeito das condições do processamento de APH no ácido ascórbico e na atividade antioxidante do suco de laranja e avaliar a qualidade do suco de laranja processado a 520 MPa, 60 °C por 360 s, comparativamente ao suco pasteurizado e não processado. A metodologia de superfície de resposta foi empregada para estimar a redução da atividade da enzima pectinametilesterase (PME), da contagem de microrganismos, do ácido ascórbico e da atividade antioxidante no suco de laranja processado por APH. Também foram avaliados, as características físico-químicas, a cor instrumental, os compostos fenólicos e a atividade antioxidante do suco de laranja. O aumento da pressão, temperatura e tempo reduziram a atividade da PME e a contagem de microrganismos, exceto pela região entre 170 a 310 MPa, 30 a 45 °C e 30 a 150 s, que aumentou a atividade da PME. A faixa ótima de processamento por APH foi 550 a 600 MPa, 55 a 60 °C e 330 a 360 s, sendo capaz de produzir suco de laranja com população de microrganismos de menos de 2 ciclos logarítmicos de UFC/mL e atividade residual da PME menor que 20%. Ainda, o aumento da temperature e do tempo do processamento por APH reduziu o teor de ácido ascórbico...
Orange juice is the most popular and consumed fruit juice in the world. Brazil is the main orange juice world producer and exporter. The consumption of orange juice is estimated at more than 9 billion liters per year, which represents 47% of global fruit juice consumption. In order to improve orange juice shelf life and stability, high hydrostatic pressure (HHP) processing can be used as an alternative to pasteurization. The aim of this work was to optimize the HHP processing conditions of Pêra Rio orange juice, namely pressure (100-600 MPa), temperature (30-60 °C) and time (30-360 s), to evaluate the effect of HHP processing conditions on ascorbic acid and antioxidant activity of orange juice and to evaluate the quality of orange juice processed at 520 MPa, 60 °C for 260 s in comparison to pasteurized and non processed orange juice. Response surface methodology was used to estimate the decrease of microflora, pectinmethyl esterase (PME) activity, ascorbic acid and antioxidant activity in HHP processed Pêra Rio orange juice. The physicalchemical characteristics, the instrumental color, the total phenolic compounds and the antioxidant activity of orange juice were also evaluate. The increase in pressure, temperature and time reduced the PME activity and native microflora of orange juice, except at the region between 170 to 310 MPa, 30 to 45 °C and 30 to 150 s, which enhanced PME activity. The range of optimum HHP processing conditions were 550 to 600 MPa, 55 to 60 °C and 330 to 360 s, which was able to produce a stable orange juice with microorganisms population less than 2 log cycles CFU/mL and PME residual activity less than 20%. The increase in time and temperature of HHP exert influence on the reduction of ascorbic acid and antioxidant activity on orange juice... (Complete abstract click electronic access below)
FAPESP: 11/11574-2
FAPESP: 11/04029-8
FAPESP: 10/168267
FAPESP: 13/00424-5
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Pinto, Mirella Teixeira [UNESP]. "Estudo da vida-de-prateleira do suco de laranja concentrado e congelado". Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/88622.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste trabalho foi realizar o estudo de vida-de-prateleira do suco de laranja concentrado e congelado avaliando suas características físico-químicas e sensoriais. Foi utilizado suco de laranja fresco, pasteurizado (104°C/10s) e concentrado, da variedade Pêra, da safra/04, fornecido por indústria produtora de suco de laranja da região de Araraquara, SP. A avaliação sensorial da cor, do aroma, do sabor e da impressão global do suco de laranja fresco, do suco pasteurizado e do suco concentrado foi realizada por uma equipe de 50 provadores utilizando teste de aceitação com escala hedônica estruturada de 9 pontos. Foram também determinados o teor de sólidos solúveis totais, o pH, a acidez total, o ratio, o teor de açúcares totais, de açúcares redutores, de ácido ascórbico e o conteúdo de hidroximetilfurfural. As análises foram realizadas logo após o processamento dos sucos - no tempo zero de estocagem - e durante a vida-de-prateleira do suco concentrado e congelado. O suco de laranja fresco apresentou as maiores notas de aceitação seguido do suco concentrado e do suco pasteurizado. O suco pasteurizado diferiu significativamente (p<0,05) dos demais em relação a todos os atributos avaliados, embora todos os sucos tenham apresentado aceitação sensorial superior à nota de corte. A aceitação de todos os atributos variou linearmente com o tempo de estocagem. O teor de sólidos solúveis totais dos sucos variou de 10,9 a 11,0°Bri x (p<0,05). A acidez total foi de 0,68 g ácido cítrico/100 mL para o suco de laranja fresco a 0,81 g ácido cítrico/100 mL para o suco concentrado (p<0,05). O ratio dos sucos variou entre 13,5 e 15,9 (p<0,05). O suco de laranja fresco apresentou pH 3,8 (p<0,05) e o maior teor de açúcares totais (9,0 g glicose/100 mL suco) (p<0,05). O suco de laranja pasteurizado apresentou o maior teor de açúcares redutores...
The aim of this work was to study the shelf life of frozen concentrated orange juice evaluating its physicochemical and sensory characteristics. Fresh orange juice, pasteurized orange juice (104°C/10s) and frozen con centrated orange juice of the Pera variety from the 2004 harvest were supplied by an orange juice industry in the Araraquara region, SP, Brazil. The sensorial evaluation of color, aroma, flavor and overall impression of the fresh, pasteurized and concentrated orange juice was carried out using a panel of 50 members, with a 9-point structured hedonic scale. Total soluble solids, pH, total acidity, ratio, total sugar, reducing sugar, ascorbic acid and hydroxymethylfurfural contents were also determined. The analyses were performed immediately after the juices were processed zero time of storage - and during the shelf life of the frozen concentrated orange juice. The fresh orange juice presented the highest acceptance scores, followed by the concentrated and the pasteurized juice. The pasteurized juice differed significantly (p<0.05) from the others with respect to all the attributes although all the juices showed sensorial acceptance higher than the cut off score. The acceptance of all the attributes varied linearly with storage. The total soluble solids of the juices varied from 10.9 to 11.0°Brix (p<0.05). Total acidi ty varied from 0.68 g citric acid/100 mL for the fresh orange juice to 0.81 g citric acid/100 mL for the concentrated juice (p<0.05). The ratio of the juices varied between 13.5 and 15.9 (p<0.05). The fresh orange juice showed pH 3.8 (p<0.05), the highest total sugar content (9.0 g glucose/100 mL juice) (p<0.05) and the highest ascorbic acid content (p<0.05), 66.7 mg/100 mL. The pasteurized orange juice showed the highest reducing sugar content (5.4 g glucose/100mL) (p<0.05)... (Complete abstract, click electronic address below)
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Dourado, Grace Kelly Zanotti Simões [UNESP]. "Efeito do suco de laranja sobre biomarcadores relacionados ao excesso de peso e ao câncer". Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115647.
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O objetivo desta pesquisa foi verificar o efeito do suco de laranja (SL) sobre dois tipos de condições, cuja as etiologias podem estar intimamente associadas a uma alimentação desequilibrada: o excesso de peso e o câncer. Baseado nessa abordagem, nós escolhemos avaliar os efeitos do SL em dois modelos experimentais diferentes: em humanos com excesso de peso (in vivo) e em cultura de células leucêmicas (in vitro). No experimento in vivo foram avaliados os níveis séricos de biomarcadores metabólicos, inflamatórios e oxidativos de indivíduos com peso normal e com sobrepeso após o consumo de oito semanas de suco de laranja blond (SLB). Os indivíduos foram divididos de acordo com o índice de massa corporal (IMC) em dois grupos: Peso normal e Sobrepeso. Em ambos os grupos, os indivíduos ingeriram 750 mL de SL diariamente. Foram avaliados a composição corporal (peso, estatura, IMC, gordura e circunferência da cintura), biomarcadores metabólicos (colesterol total, LDL-C, HDL-C, triglicérides, glicose, insulina, resistência à insulina e hemoglobina glicada), inflamatórios (proteína C reativa, IL-4, IL-10, IL-12, TNF-? e IFN-?) e oxidativos (malondialdeído e DPPH??). Os resultados mostraram que após o consumo de SLB, as medidas da composição corporal não foram alteradas em nenhum dos grupos. Entretanto, houve redução nos níveis de lipídeos séricos, aumento da citocina IL-12, diminuição da proteína C reativa e aumento na capacidade antioxidante em indivíduos com peso normal e sobrepeso. No experimento in vitro foram examinados o crescimento, o ciclo e apoptose celular após a administração do suco de laranja blond (SLB), do suco de laranja vermelha (SLV) e da hesperidina (HSP) em uma nova linhagem celular de leucemia linfoblástica aguda de células T (Loucy). A distribuição do ciclo celular e a morte celular por apoptose foram determinadas utilizando citometria de fluxo. A secreção das citocinas ...
The objective of this study was to verify the effect of orange juice (OJ) on two types of conditions whose etiologies may be closely associated with an unbalanced diet: overweight and cancer. Based on this approach, we chose to evaluate the effects of OJ in two different experimental models: in overweight humans (in vivo) and in cultured leukemic cells (in vitro). In the in vivo experiment were evaluated serum levels of metabolic, inflammatory and oxidative biomarkers of normal weight and overweight after consuming eight weeks of blond orange juice (BOJ). The subjects were divided according to body mass index (BMI) in two groups: normal weight and overweight. In both groups, subjects ingested 750 ml of BOJ daily. Body composition (weight, height, BMI, fat and waist circumference), metabolic biomarkers (total cholesterol, LDL-C, HDL-C, triglycerides, glucose, insulin, insulin resistance and glycated hemoglobin), inflammatory (protein were evaluated C reactive protein, IL-4, IL-10, IL-12, TNF-? and IFN-?) and oxidation (malondialdehyde and DPPH??). The results showed that after BOJ consumption, the measurements of body composition were not altered in either group. However, there was a reduction in serum lipid levels, increased cytokine IL-12, decreased C-reactive protein and increased of antioxidant capacity in normal and overweight. In the in vitro study, the growth, cycle and apoptosis cell were examined after administration of BOJ juice, red orange juice (ROJ), and hesperidin (HSP) into a new acute lymphoblastic leukemia cell line T cells (Loucy). The cell cycle distribution and apoptotic cell death were determined using flow cytometry. The secretion of IL-1?, IL1-?, IL-2, IL-4, IL-6, IL-10, IL-17A, IFN?, TNF?, TGF?, and MIP? were evaluated by ELISA array. BOJ and ROJ caused no alterations in cell proliferation, but both reduced cell viability by about 25%. BOJ induced cell cycle arrest in G0/G1 phase and decreased the ...
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Paiva, Aline Cardoso de [UNESP]. "Efeitos da ingestão aguda do suco de laranja na resposta glicêmica e insulínica, níveis séricos de leptina e adiponectina, consumo energético e atividade antioxidante". Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/122024.
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000815387.pdf: 725212 bytes, checksum: 8671b2c9eb067044b7e468cdc2529d0a (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Introdução: O suco de laranja contém açúcares e flavonoides que podem influenciar a saciedade, o consumo energético e de macronutrientes e o peso corporal, podendo ser um coadjuvante no tratamento e prevenção da obesidade e das doenças crônicas relacionadas. Objetivo: investigar o efeito da ingestão aguda do suco de laranja fresco e integral pasteurizado sobre a glicemia, marcadores da saciedade (insulina, leptina, adiponectina), no consumo alimentar e estresse oxidativo de indivíduos com peso normal e excesso de peso. Metodologia: Foi realizado um ensaio clínico com intervenção dietética aguda em 36 indivíduos saudáveis, com estado nutricional adequados ou acima do peso, de ambos os sexos. Os indivíduos foram submetidos a 3 etapas experimentais: 1) ingestão de suco de laranja fresco, 2) ingestão do suco de laranja pasteurizado e, 3) ingestão da bebida controle com sabor de laranja. Antes e após o consumo das bebidas testes foram feitas coletas de sangue (0, 30, 60, 120 e 300 min) para analise dos parâmetros bioquímicos (glicose, insulina, leptina, adiponectina) e posterior cálculo da resistência à insulina. Logo após a ingestão das bebidas os voluntários recebiam um café da manhã “ad libitum” onde eram anotados os alimentos consumidos nesta refeição e também nas outras realizadas durante o dia experimental. As análises da composição corporal (peso, estatura, índice de massa corporal, percentual de gordura e circunferência da cintura) e metabólicas (colesterol total, LDL-C, HDL-C, triglicérides) foram realizadas no primeiro dia do estudo. Os hormônios (leptina e adiponectina) foram dosados pelo método ELISA. O estresse oxidativo foi quantificado através dos métodos de determinação do estado antioxidante total (ABTS) e da peroxidação lipídica através da determinação das substâncias reativas ao ácido tiobarbitúrico (TBARS). Resultados: Os resultados mostraram que os voluntários obesos ...
Introduction: Orange juice contains sugars and flavonoids that may influence satiety and energy and macronutrient intake, and body weight. Objective: investigating the effect of acute ingestion of fresh orange juice and pasteurized whole juice on blood glucose, markers of satiety and food intake in normal weight and overweight. Methods: A clinical study with acute dietary intervention in 36 healthy subjects with adequate nutritional status or overweight of both sexes was conducted. The subjects underwent three experimental steps: 1) intake of fresh orange (FOJ), 2) ingestion of pasteurized juice (POJ) and orange juice, 3) ingestion of the control beverage (CB) with orange flavor. Before and after consumption of the test beverage, bloods sampling (0, 30, 60, 120 and 300 min) were taken for analysis of biochemical parameters (glucose, insulin, leptin, adiponectin) and subsequent calculation of insulin resistance. Soon after ingestion of drinks volunteers received a breakfast of ad libitum where food consumption were noted in this meal and also the other made during the experimental day. Analyses of body composition (weight, height, body mass index, body fat percentage and waist circumference), parameters metabolic (total cholesterol, LDL-C, HDL-C, triglycerides) were performed on the first day of the study. Hormones (leptin and adiponectin) were measured by ELISA. Oxidative stress was quantified by measuring TBARS and ABTS methods. Results: The results showed that obese of both sexes volunteers have risk factors for developing metabolic syndrome, 61% have insulin resistance. For normal weight subjects, total concentration (AUC300min) of glucose and insulin was higher after CB, following by POJ (intermediate), and FOJ (lower). By it turn, normal weight subjects have shown total concentration of leptin (AUC300min) higher after FOJ intake, middle after POJ, and lower after CB. Adiponectin levels showed no change compared to the tested beverages.
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Dourado, Grace Kelly Zanotti Simões. "Efeito do suco de laranja sobre biomarcadores relacionados ao excesso de peso e ao câncer /". Araraquara, 2014. http://hdl.handle.net/11449/115647.
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Orientador: Thais Borges CésarBanca: Ellen Cristini de Freitas
Banca: Paulo Inácio da Costa
Banca: Anderson Marliere Navarro
Banca: José Ernesto dos Santos
Resumo: O objetivo desta pesquisa foi verificar o efeito do suco de laranja (SL) sobre dois tipos de condições, cuja as etiologias podem estar intimamente associadas a uma alimentação desequilibrada: o excesso de peso e o câncer. Baseado nessa abordagem, nós escolhemos avaliar os efeitos do SL em dois modelos experimentais diferentes: em humanos com excesso de peso (in vivo) e em cultura de células leucêmicas (in vitro). No experimento in vivo foram avaliados os níveis séricos de biomarcadores metabólicos, inflamatórios e oxidativos de indivíduos com peso normal e com sobrepeso após o consumo de oito semanas de suco de laranja blond (SLB). Os indivíduos foram divididos de acordo com o índice de massa corporal (IMC) em dois grupos: Peso normal e Sobrepeso. Em ambos os grupos, os indivíduos ingeriram 750 mL de SL diariamente. Foram avaliados a composição corporal (peso, estatura, IMC, gordura e circunferência da cintura), biomarcadores metabólicos (colesterol total, LDL-C, HDL-C, triglicérides, glicose, insulina, resistência à insulina e hemoglobina glicada), inflamatórios (proteína C reativa, IL-4, IL-10, IL-12, TNF-α e IFN-γ) e oxidativos (malondialdeído e DPPH). Os resultados mostraram que após o consumo de SLB, as medidas da composição corporal não foram alteradas em nenhum dos grupos. Entretanto, houve redução nos níveis de lipídeos séricos, aumento da citocina IL-12, diminuição da proteína C reativa e aumento na capacidade antioxidante em indivíduos com peso normal e sobrepeso. No experimento in vitro foram examinados o crescimento, o ciclo e apoptose celular após a administração do suco de laranja blond (SLB), do suco de laranja vermelha (SLV) e da hesperidina (HSP) em uma nova linhagem celular de leucemia linfoblástica aguda de células T (Loucy). A distribuição do ciclo celular e a morte celular por apoptose foram determinadas utilizando citometria de fluxo. A secreção das citocinas ...
Abstract: The objective of this study was to verify the effect of orange juice (OJ) on two types of conditions whose etiologies may be closely associated with an unbalanced diet: overweight and cancer. Based on this approach, we chose to evaluate the effects of OJ in two different experimental models: in overweight humans (in vivo) and in cultured leukemic cells (in vitro). In the in vivo experiment were evaluated serum levels of metabolic, inflammatory and oxidative biomarkers of normal weight and overweight after consuming eight weeks of blond orange juice (BOJ). The subjects were divided according to body mass index (BMI) in two groups: normal weight and overweight. In both groups, subjects ingested 750 ml of BOJ daily. Body composition (weight, height, BMI, fat and waist circumference), metabolic biomarkers (total cholesterol, LDL-C, HDL-C, triglycerides, glucose, insulin, insulin resistance and glycated hemoglobin), inflammatory (protein were evaluated C reactive protein, IL-4, IL-10, IL-12, TNF-α and IFN-γ) and oxidation (malondialdehyde and DPPH). The results showed that after BOJ consumption, the measurements of body composition were not altered in either group. However, there was a reduction in serum lipid levels, increased cytokine IL-12, decreased C-reactive protein and increased of antioxidant capacity in normal and overweight. In the in vitro study, the growth, cycle and apoptosis cell were examined after administration of BOJ juice, red orange juice (ROJ), and hesperidin (HSP) into a new acute lymphoblastic leukemia cell line T cells (Loucy). The cell cycle distribution and apoptotic cell death were determined using flow cytometry. The secretion of IL-1α, IL1-β, IL-2, IL-4, IL-6, IL-10, IL-17A, IFNγ, TNFα, TGFβ, and MIPα were evaluated by ELISA array. BOJ and ROJ caused no alterations in cell proliferation, but both reduced cell viability by about 25%. BOJ induced cell cycle arrest in G0/G1 phase and decreased the ...
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Paiva, Aline Cardoso de. "Efeitos da ingestão aguda do suco de laranja na resposta glicêmica e insulínica, níveis séricos de leptina e adiponectina, consumo energético e atividade antioxidante /". Araraquara, 2014. http://hdl.handle.net/11449/122024.
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Orientador: Thais Borges CésarBanca: Michel Nasser
Banca: Iguatemy Lourenço Brunetti
Banca: Lívia Gussoni Basile
Banca: Thábata Koester Weber
Resumo: Introdução: O suco de laranja contém açúcares e flavonoides que podem influenciar a saciedade, o consumo energético e de macronutrientes e o peso corporal, podendo ser um coadjuvante no tratamento e prevenção da obesidade e das doenças crônicas relacionadas. Objetivo: investigar o efeito da ingestão aguda do suco de laranja fresco e integral pasteurizado sobre a glicemia, marcadores da saciedade (insulina, leptina, adiponectina), no consumo alimentar e estresse oxidativo de indivíduos com peso normal e excesso de peso. Metodologia: Foi realizado um ensaio clínico com intervenção dietética aguda em 36 indivíduos saudáveis, com estado nutricional adequados ou acima do peso, de ambos os sexos. Os indivíduos foram submetidos a 3 etapas experimentais: 1) ingestão de suco de laranja fresco, 2) ingestão do suco de laranja pasteurizado e, 3) ingestão da bebida controle com sabor de laranja. Antes e após o consumo das bebidas testes foram feitas coletas de sangue (0, 30, 60, 120 e 300 min) para analise dos parâmetros bioquímicos (glicose, insulina, leptina, adiponectina) e posterior cálculo da resistência à insulina. Logo após a ingestão das bebidas os voluntários recebiam um café da manhã "ad libitum" onde eram anotados os alimentos consumidos nesta refeição e também nas outras realizadas durante o dia experimental. As análises da composição corporal (peso, estatura, índice de massa corporal, percentual de gordura e circunferência da cintura) e metabólicas (colesterol total, LDL-C, HDL-C, triglicérides) foram realizadas no primeiro dia do estudo. Os hormônios (leptina e adiponectina) foram dosados pelo método ELISA. O estresse oxidativo foi quantificado através dos métodos de determinação do estado antioxidante total (ABTS) e da peroxidação lipídica através da determinação das substâncias reativas ao ácido tiobarbitúrico (TBARS). Resultados: Os resultados mostraram que os voluntários obesos ...
Abstract: Introduction: Orange juice contains sugars and flavonoids that may influence satiety and energy and macronutrient intake, and body weight. Objective: investigating the effect of acute ingestion of fresh orange juice and pasteurized whole juice on blood glucose, markers of satiety and food intake in normal weight and overweight. Methods: A clinical study with acute dietary intervention in 36 healthy subjects with adequate nutritional status or overweight of both sexes was conducted. The subjects underwent three experimental steps: 1) intake of fresh orange (FOJ), 2) ingestion of pasteurized juice (POJ) and orange juice, 3) ingestion of the control beverage (CB) with orange flavor. Before and after consumption of the test beverage, bloods sampling (0, 30, 60, 120 and 300 min) were taken for analysis of biochemical parameters (glucose, insulin, leptin, adiponectin) and subsequent calculation of insulin resistance. Soon after ingestion of drinks volunteers received a breakfast of "ad libitum" where food consumption were noted in this meal and also the other made during the experimental day. Analyses of body composition (weight, height, body mass index, body fat percentage and waist circumference), parameters metabolic (total cholesterol, LDL-C, HDL-C, triglycerides) were performed on the first day of the study. Hormones (leptin and adiponectin) were measured by ELISA. Oxidative stress was quantified by measuring TBARS and ABTS methods. Results: The results showed that obese of both sexes volunteers have risk factors for developing metabolic syndrome, 61% have insulin resistance. For normal weight subjects, total concentration (AUC300min) of glucose and insulin was higher after CB, following by POJ (intermediate), and FOJ (lower). By it turn, normal weight subjects have shown total concentration of leptin (AUC300min) higher after FOJ intake, middle after POJ, and lower after CB. Adiponectin levels showed no change compared to the tested beverages.
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