Academic literature on the topic 'Oils and fats, Edible Oxidation'
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Journal articles on the topic "Oils and fats, Edible Oxidation"
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Ahmed, Waqar. "Quality assessment of used edible fats and oils by local vendors of Faisalabad." Pakistan Journal of Agricultural Sciences 58, no. 06 (November 1, 2021): 1859–69. http://dx.doi.org/10.21162/pakjas/21.1200.
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Fats and oils are both economically and scientifically important in food systems and play an important role in nutrition. The principal causes of fat degradation are oxidation and hydrogenation, which have a detrimental impact on quality aspects of oils and fats such as color, texture, flavor, aroma, consistency, and appearance. The current research was conducted to determine the oil degradation factors by collecting fifty samples of fried oils used by street vendors from twenty-five different locations in Faisalabad area in order to assess the quality parameters of locally available fats and oil products. Procured samples underwent physicochemical tests to determine the degree of degradation and oxidation. The parameters analyzed for quality evaluation include free fatty acids (FFA), peroxide value (PV), iodine value (IV), saponification value (SV), viscosity, refractive index (RI), p-anisidine value (p-AV), thiobarbeturic acid value (TBA), specific gravity (SG) and fatty acid profile through gas chromatograph equipped with flame ionization detector. The analyses revealed significant oxidation and degradation in many of the vendor fried fats and oil that were procured. Physicochemical characteristics as well as oxidative stability attributes were deviated from the standard values defined by Codex Alimentarius and Punjab Pure Food Regulations (PPFR). In majority of the samples, the fatty acid profile exhibited increased levels of trans-9-elaidic acid and linolelaidic acid, indicating the presence of trans-fatty acid because of hydrogenation and high-temperature frying of fats and oils. The overall quality of most procured samples was in decline from recommended standards and unsuitable for frying and edible purposes
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Sabolová, Monika, Václav Zeman, Gabriela Lebedová, Marek Doležal, Josef Soukup, and Zuzana Réblová. "Relationship between the fat and oil composition and their initial oxidation rate during storage." Czech Journal of Food Sciences 38, No. 6 (December 23, 2020): 404–9. http://dx.doi.org/10.17221/207/2020-cjfs.
Full textAbstract:
Until now, the relationship between the fat and oil composition and their oxidation stability has been studied only at elevated temperatures (typically above 100 °C). Therefore, the initial oxidation rates of 19 edible fats and oils were determined as an increase in the peroxide value during storage in the dark at 35 °C with free access to air (oxygen). The initial oxidation rates of fats and oils were compared with parameters characterising these fats and oils (peroxide value, acid value, fatty acid composition, antioxidant capacity, and tocochromanol content). Using a simple correlation analysis, the initial oxidation rate correlated the most strongly with the peroxide value of the analysed fats and oils (P < 0.01). A highly reliable model (P < 0.0001) was obtained by multivariate statistical analysis. According to this model, the initial oxidation rate is affected mainly by the peroxide value and then by total trans fatty acid content, and antioxidant capacity.
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Liang, Pengjuan, Chaoyin Chen, Shenglan Zhao, Feng Ge, Diqiu Liu, Binqiu Liu, Qimeng Fan, Benyong Han, and Xianfeng Xiong. "Application of Fourier Transform Infrared Spectroscopy for the Oxidation and Peroxide Value Evaluation in Virgin Walnut Oil." Journal of Spectroscopy 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/138728.
Full textAbstract:
Recent developments in Fourier transform infrared spectroscopy-partial least squares (FTIR-PLSs) extend the application of this strategy to the field of the edible oils and fats research. In this work, FT-IR spectroscopy was used as an effective analytical tool to determine the peroxide value of virgin walnut oil (VWO) samples undergone during heating. The spectra were recorded from a film of pure oil between two disks of KBr for each sample at frequency regions of 4000–650 cm−1. Changes in the values of the frequency of most of the bands of the spectra were observed and used to build the calibration model. PLS model correlates the actual and FT-IR estimated value of peroxide value with a correlation coefficient of 0.99, and the root mean square error of the calibration (RMSEC) value is 0.4838. The methodology has potential as a fast and accurate way for the quantification of peroxide value of the edible oils.
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Kowalski, Bolesław. "Thermal-oxidative decomposition of edible oils and fats. DSC studies." Thermochimica Acta 184, no. 1 (July 1991): 49–57. http://dx.doi.org/10.1016/0040-6031(91)80134-5.
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Vidrih, R., S. Vidakovič, and H. Abramovič. "Biochemical parameters and oxidative resistance to thermal treatment of refined and unrefined vegetable edible oils." Czech Journal of Food Sciences 28, No. 5 (October 14, 2010): 376–84. http://dx.doi.org/10.17221/202/2008-cjfs.
Full textAbstract:
In human nutrition fats are physiologically important food constituents but also the components most liable to oxidative degradation. The oils included in the study were refined (sunflower, extra-sunflower, soybean, and rapeseed) as well as unrefined (olive and pumpkin-seed) oils. The aim of our study was to determine the fatty acid composition, tocopherol content, and quality parameters such as the free fatty acid content, peroxide value, and induction time. Extra virgin olive oil had the highest average peroxide value, while unrefined pumpkin seed oil had the lowest one. The acid value of the unrefined oils was higher on average than that of the refined oils. Soybean oil had the highest total tocopherol content and extra virgin olive oil the lowest one. The refined oils with higher contents of saturated and monounsaturated fatty acids and lower polyunsaturated fatty acid contents had a high oxidative stability. A negative correlation has been found in the oils between the induction time and polyunsaturated fatty acid content. Among the oils investigated, unrefined pumpkin seed oil was the most oxidatively stable, the other oils following in the decreasing order: extra virgin olive > high oleic sunflower > rapeseed > soybean > sunflower oil. The oxidative stability of the unrefined oils was better than that of the refined oils.
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Ghodsi, Ramin, and Rahmat Nosrati. "Effects of Minor Compounds of Edible Oils on Human Health." Current Nutrition & Food Science 16, no. 8 (September 10, 2020): 1196–208. http://dx.doi.org/10.2174/1573401316666200203121034.
Full textAbstract:
Background: Oils and fats are the densest sources of food energy among food groups. Vegetable oils are constituted predominantly of triglycerides. Due to the importance of edible oils in nutrition, food industry and human health, great attention has been paid to them in recent years. Some minor bioactive constituents in oils include phospholipids, tocols, sterols, carotenoid, chlorophyll, phenols, phylokynon and terpenes. Objective: The aim of the present study was to examine beneficial effects of minor compounds in edible oils on human health. Results: Minor compounds of edible oils that we use daily can produce remarkable results in the prevention and treatment of various diseases like diabetes, inflammation, hypertension, cancer, allergy and central nervous system disorders due to their antimicrobial, anti-cancer, anti-viral, anti-oxidative, anti-inflammation, anti-mutagenic, hypolipidemic, and hypoglycemic properties, among others. Conclusion: The results of this study showed that the presence of beneficial minor compounds in oils could have significant impact on the prevention and treatment of various diseases. Therefore, the type of consumed oil can play an important role in human health.
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Varona, Elisa, Alba Tres, Magdalena Rafecas, Stefania Vichi, Roser Sala, and Francesc Guardiola. "Oxidative Quality of Acid Oils and Fatty Acid Distillates Used in Animal Feeding." Animals 11, no. 9 (August 31, 2021): 2559. http://dx.doi.org/10.3390/ani11092559.
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Acid oils (AO) and fatty acid distillates (FAD) are byproducts from chemical and physical refining of edible oils and fats, respectively. Their high energy value makes their upcycling interesting as alternatives to conventional fats in animal feeding. The objective of this study is to characterize their oxidative quality and to provide recommendations about their evaluation for animal feeding purposes. The oxidation status (peroxide value (PV), p-Anisidine value (p-AnV), % polymeric compounds (POL)), the oxidative stability (induction time by the Rancimat at 120 °C (IT)), the fatty acid composition (FA), and tocopherol and tocotrienol content of 92 AO and FAD samples from the Spanish market were analyzed. Both AO and FAD showed low PV (0.8 and 1 meq O2/kg); however, p-AnV was higher in FAD (36.4 vs. 16.4 in AO) and POL was higher in AO (2.5% vs. not detected in FAD) as a consequence of the type of refining process. The botanical origin of AO and FAD influenced FA and tocol composition, and they influenced IT. A high variability was observed for most analyzed parameters, reinforcing the need for standardizing AO and FAD to obtain reliable feed ingredients and to include primary and secondary oxidative parameters within their quality control.
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Matthäus, Bertrand. "Quality Parameters for Cold Pressed Edible Argan Oils." Natural Product Communications 8, no. 1 (January 2013): 1934578X1300800. http://dx.doi.org/10.1177/1934578x1300800109.
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Argan oil belongs to the high-price vegetable oils on the market. Therefore, consumers have the right to purchase a high-quality product. The quality of edible vegetable oils is defined in food standards in which sensory quality is the most important feature. Additional parameters are defined to assess the identity of oils or to evaluate their oxidative state. The sensory quality of cold pressed argan oil is altered if the production has not been performed with reasonable care regarding raw material and extraction. Only oil from roasted seeds extracted by a screw-press had a sufficient sensory quality over a period of 20 weeks without unacceptable sensory attributes. Under accelerated storage conditions oil from roasted seeds extracted by a screw-press remained below the limits given by the Codex Alimentarius or the German guideline for Edible Fats and Oils for peroxide and totox value. Oil from unroasted seeds or oil from goat- digested roasted seeds and extracted by a screw-press, as well as oil from roasted seeds traditionally extracted, exceeded these limits. Initial oxidative stability of oil from unroasted seeds was significantly lower than that of the other oils. After 35 days under accelerated storage, oil from roasted seeds obtained using a screw-press showed the highest oxidative stability. Moreover, tocopherol and phytosterol compositions are useful features of argan oil.
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Romanić, Ranko, Tanja Lužaić, and Ksenija Grgić. "Examining the Possibility of Improving the Properties of Sunflower Oil in Order to Obtain a Better Medium for the Process of Frying Food." Proceedings 70, no. 1 (November 10, 2020): 104. http://dx.doi.org/10.3390/foods_2020-07748.
Full textAbstract:
With the modern and accelerated way of life, frying has become an extremely common way of food preparation. In the frying process, hot oil or fat serves as a heat transfer medium. Ideal fat in all frying processes does not exist due to differences in the chemical composition of the product, process conditions, expected nutritive value, and shelf life of the final product. During frying, physical and chemical changes simultaneously occur changing the chemical composition of edible oils. The food is immersed in hot fat, in the presence of air, where the frying medium is directly affected by three agents: moisture from the food, atmospheric oxygen, and high temperature. Reactions that occur are hydrolysis, auto-oxidation, thermal oxidation, and thermal decomposition, and the products that occur affect various physical and chemical changes in fats, as well as in fried food. The quality and oxidative stability of vegetable oils or their resistance to changes caused by oxidative processes is the time during which oils can be protected from the (auto) oxidation process. Analytical methods used in practice to determine the oxidative stability of oils are accelerated oil oxidation test (Rancimat test and OSI index) and Schaal oven test. In this paper, the possibilities of improving refined sunflower oil in order to obtain oil with greater applications in the food frying process are examined. Standard refined sunflower oil, sunflower oil with altered fatty acid composition, as well as sunflower oil enriched with natural and synthetic antioxidants were tested. The obtained results were compared with palmolein, commonly used for food frying. Of the tested sunflower oils, high-oleic sunflower oil with an iodine value (IV) of 85 g/100 g, OSI index of 9.3, and total oxidation (TOTOX) index of 4.73, increased 6.66 times after exposure to frying proving to be the most similar to palmolein (IV = 57 g/100 g; OSI = 17.8; TOTOX = 7.60).
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NYKTER, M., H.-R. KYMÄLÄINEN, and F. GATES. "Quality characteristics of edible linseed oil." Agricultural and Food Science 15, no. 4 (December 4, 2008): 402. http://dx.doi.org/10.2137/145960606780061443.
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In this review the quality properties of linseed oil for food uses are discussed as well as factors affecting this quality. Linseed oil has a favourable fatty acid composition with a high linolenic acid content. Linseed oil contains nearly 60% á-linolenic acid, compared with 25% for plant oils generally. The content of linolenic acid and omega-3 fatty acids is reported to be high in linseed grown in northern latitudes. The composition of fatty acids, especially unsaturated fatty acids, reported in different studies varies considerably for linseed oil. This variation depends mainly on differences in the examined varieties and industrial processing treatments. The fatty acid composition leads also to some problems, rancidity probably being the most challenging. Some information has been published concerning oxidation and taste, whereas only a few studies have focused on colour or microbiological quality. Rancidity negatively affects the taste and odour of the oil. There are available a few studies on effects of storage on composition of linseed oil. In general, storage and heat promote auto-oxidation of fats, as well as decrease the amounts of tocopherols and vitamin E in linseed oil. Several methods are available to promote the quality of the oil, including agronomic methods and methods of breeding as well as chemical, biotechnological and microbiological methods. Time of harvesting and weather conditions affect the quality and yield of the oil.;
Dissertations / Theses on the topic "Oils and fats, Edible Oxidation"
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Aladedunye, Adekunle Felix. "Inhibiting thermo-oxidative degradation of oils during frying." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, 2011, 2011. http://hdl.handle.net/10133/3257.
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The present study sought for practical ways to improve the frying performance of
oils without compromising the availability of the essential fatty acids and nutraceuticals.
To this end, the influence of temperature, oxygen concentrations, and compositions of
minor components on frying performance was investigated.
A novel frying protocol, utilizing carbon dioxide blanketing, was developed and
found to significantly improve the performance of the frying oil. Optimizing both the
amounts and the compositions of endogenous minor components also improved the
performance of the frying oil.
Twenty one novel antioxidants were synthesized and evaluated under frying and
storage conditions. Antioxidant formulations consisting of a combination of endogenous
and synthesized antioxidants were developed and tested in an institutional frying
operation.
A rapid and effective frying test was developed to assess the frying performance
of oils and applied antioxidants. Furthermore, a novel procedure for direct
hydroxynonenal analysis in frying oil was developed.xx, 249 leaves; 29 cm
2
Cash, Gregory Anthony. "Studies of the oxidation and stabilisation of vegetable oils and model compounds." Thesis, Queensland University of Technology, 1986. https://eprints.qut.edu.au/35985/1/35985_Cash_1986.pdf.
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This thesis describes the use of a novel chemiluminescence (CL)
technique to deter·mine the extent of oxidation and stability in
both model compounds and vegetable oils. As it is the presence
of hydroperoxides in vegetable oils that leads to theirdeterioration,
the hydroperoxides of methyl linoleate (MU were
used as model compounds in a CL study of hydroperoxide
decomposition in nitrogen, both in the bulk and on active
substrates. The largest signals and the fastest decays
occurred on neutral alumina. The results indicate induced
decomposition via a bimolecular initiation of hydroperoxides
adsorbed on adjacent active sites. The majority of these
hydroperoxides are vertical to the surface, being bound to the
alumina through the ester group only.
A relationship was found between hydroperoxide concentr·ation
and initial intensity when the methyl linoleate hydroperoxide
was adsorbed on neutral alumina. Solutions of natural and
arti-ficial antioxidants in ML were studied. Some solutions
gave changes in kinetics. These changes suggest that the
antioxidant itself may contribute to the CL. The method of
inhibitors was used to find the rate of initiation and
hydroperoxide level in ML at 80c:>C.
The spectral distribution of CL was determined for model
compounds, antioxidants and vegetable oils. In the presence of
antioxidants ther-e was a shift towar-d the r-ed end of the
spectr-um. In model compounds, the CL was most likely due to an
excited triplet state ketone and this is consistent with the
mechanism for- ter·mination of alkyl peroxy r-adicals.
The techniques developed for the model compounds were extended
to the mor-e complex vegetable oils. Unrefined and deliberately
damaged vegetable oils were studied at 80c:>C on neutral
alumina. CL examination of these oils in nitr-ogen was able to distinguish between some damaged and undamaged oils.
Conjugated diene levels did not correlate well with CL results.
0<-tocopherol and a-carotene were found to be chemiluminescent
on alumina and their presence in unr·efined oil may inter·fer·e
with CL assessment.
The method of inhibitors, when applied to a vegetable oil
sample, permitted the determination of both hydroperoxide
concentration and the level of natural antioxidant alr-eady
present in the oil.
ii
3
Russin, Ted Anthony. "A novel and rapid method to monitor the autoxidation of edible oils using Fourier transform infrared spectroscopy and disposable infrared cards /." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79119.
Full textAbstract:
A novel and rapid method was developed to monitor the autoxidation of edible oils by Fourier transform infrared (FTIR) spectroscopy with the use of disposable polymer infrared (PIR) cards having a microporous polytetrafluoroethylene (PTFE) sample substrate. Under conditions of mild heating (~58°C) and aeration, both model triacylglycerols (TAGS) and edible oils applied onto the PIR cards underwent rapidly accelerated oxidation. In order to compare the oxidative stability of samples on the PIR cards in terms of the time required to reach a peroxide value (PV) of 100 mequiv/kg oil, matching the end-point measured in the standard active oxygen method (AOM), an absorbance slope factor (ASF) was determined to relate changes in hydroperoxide (ROOH) absorbance (peak maximum found within the range of 3500--3200 cm-1 ) to PV. Similar ASF values were found for the four edible oils tested (safflower, canola, sunflower, and extra virgin olive oil), permitting determination of a pooled, universally applicable ASF value of 0.0526 mAbs/PV.
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Bati, Nabil A. "Thermal, oxidative and hydrolytic stability of selected frying shortenings evaluated by new and conventional methods." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54488.
Full textAbstract:
The thermal, oxidative, and hydrolytic stability of several frying shortenings were studied via chemical, physical and sensory analyses. Corn, cottonseed and peanut oils, and cottonseed and soybean liquid shortenings were tested under static heating conditions, while peanut oil, and cottonseed and soybean oil liquid shortenings were evaluated under commercial frying conditions.
The research had two objectives: to evaluate the relative stability of the various shortenings under both heating condition; and to evaluate new or modified quality assessment methods which would provide early prediction of heat abuse for the fast-food industry.
Six of the conducted analyses were conventional or modified: free fatty acids; polar components; gas chromatograph volatile profiles; viscosity; FoodOil-Sensor; and sensory. Three were new: contact angle; high temperature; and high-temperature gas chromatographic analysis of triglyceride; and polar component % as determined by high-performance thin-layer chromatography (HPTLC).
Under static heating conditions, varying heating periods or shortening types had significant (P<0.000l) effects on the resulting data of the following tests: free fatty acids; polar component; total volatiles; dielectric constant; viscosity; polar component % measured by HPTLC; contact angle; and sensory analysis; but heating time had no significant effect on triglyceride profiles
Under commercial frying conditions of chicken nuggets and filets, heating time had significant effects on changes in the dielectric constant; free fatty acid %; viscosity; contact angle; and sensory rating; also it had a significant effect on the polar component % under chicken nugget frying conditions only. Furthermore, heating time had no significant effect on polar component % under chicken filet frying conditions and on polar component % by HPTLC under both frying conditions
Cottonseed oil liquid shortening had sensory scores equal to peanut oil under static and commercial frying conditions even though peanut oil exhibited a greater chemical and physical stability. Soybean oil liquid shortening had an objective quality identical to peanut oil, however, its subjective quality was lower. Cottonseed oil liquid shortening had better flavor but less objective stability than soybean oil liquid shortening
The cut-off quality level for the shortenings was not reached, because all the shortenings were discarded after seven days of use which was before the onset of significant-quality deterioration.
The best on-site index of shortening stability was the FoodOil-Sensor reading (dielectric constant) which was followed by the free fatty acid test.Ph. D.
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Dubois, Janie. "Determination of peroxide value and anisidine value using Fourier transform infrared spectroscopy." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23391.
Full textAbstract:
Lipid oxidation has important consequences in the edible oil industry, producing compounds with sensory impact and thus reducing the economic value of the products. This work focused on the development of two Fourier transform infrared (FTIR) spectroscopy methods for the measurement of peroxide value (PV) and anisidine value (AV), representing the primary and secondary oxidation products of edible oils.The infrared method developed for PV determination was based on a mathematical treatment by the partial least squares method of the information contained in the spectral region between 3750 and 3150 cm$ sp{-1}$.
The second method developed considered aldehyde content and anisidine value, a measure of secondary oxidation products.
The two methods developed are rapid ($ sim$2 min/sample) and have the advantage of being automatable. An infrared system coupled to a computer can collect the spectrum of an oil, analyze it and present a report without the need for personnel trained in FTIR spectroscopy. The cost of such a system would rapidly be absorbed through savings on personnel cost, time and chemical reagents required for conventional chemical methods and as such provides a useful advance in quality control methodology for the edible oils sector. (Abstract shortened by UMI.)
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Schoeman, Mathilda Elizabeth. "Mango (Mangifera indica L.) kernel fat : fatty acid profile, oxidative stability and development of fourier transform near infrared (FT-NIR) spectroscopy calibration models." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52925.
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Thesis (MSc Food Sc )--Stellenbosch University, 2002.ENGLISH ABSTRACT: The oxidative stability of crude, cold-pressed mango kernel fat (MKF) was determined over a period of 240 days using the peroxide value (PV), conjugated diene value (CD) and p-anisidine value (AV) tests. The changes in fatty acid profile were monitored with gas chromatography and the oxidative status of MKF effectively predicted by FT-NIR spectroscopy. Results obtained from the different methods complemented each other and indicated the stable character of mango kernel fat against oxidative deterioration. The fatty acid profile constituted palmitic acid (CI6:0; 8.43%), stearic acid (CI8:0; 34.98%), oleic acid (CI8:1 cis; 48.05%), linoleic acid (CI8:2; 6.60%) and arachidic acid (C20:0; 1.73%). Trace amounts of C16:1 (0.56%), C18:1 trans (0.25%), C18:3 (0.43%), C20:1 (0.25%) and C22:0 (0.40%) were also found. The freshly pressed MKF had a peroxide value of 2.7 meq.kg", CD value of 0.07% and an AV of 2.2 mmol.kg", After 40 days of storage, the peroxide values of MKF stored with and without exposure to a limited amount of oxygen at 5, 15,25 and 40°C increased to 5 meq.kg" and 4 meq.kg" respectively. Emulsification of MKF had a stabilising effect (maximum PV = 2.8 meq.kg'), while exposure to UV light had a catalysing effect (maximum PV = 5 meq.kg'). These maximum values, decreased after 40 days. The CD values of MKF samples stored with and without exposure to oxygen at 5, 15,25 and 40°C increased to 0.18% and 0.16%, respectively at day 40. The CD values of samples exposed to light increased to 0_20% and the emulsified samples showed similar values to that of the MKF samples not exposed to oxygen. The conjugated diene values remained stable after day 40. The p-anisidine values of the MKF samples both stored with and without exposure to oxygen at 5, 15, 25 and 40°C varied between 0.5 and 5 mmol.kg". The weak correlation to the measurement of nonanal, as well as the low levels of 2-alkenals produced by the MKF, resulted in these low and sometimes non-linear values. The peroxide, conjugated diene and p-anisidine values obtained for MKF stored at 25°C over 240 days were low due to the low content of polyunsaturated fatty acids in MKF. This compared favourably with the higher values attained for sunflower, canola and olive oil, which are all rich in polyunsaturated fatty acids. The minimal changes observed in the fatty acid profile of mango kernel fat indicated the stability of the saturated fatty acids (CI6:0 and CI8:0) and oleic acid. In addition, the instability of linoleic and linolenic acids was evident due to oxidative deterioration. A decrease of 7.41% and 12.80% was observed between day 0 and 240 for the C18:2/C16:0 and C18:2/C18:0 ratios respectively. The prediction of the oxidative status of the MKF samples by near infrared spectroscopy were possible after the development of calibration models from a total data set of 300 samples of which one-third was used for independent validation. Principle component analysis (PCA) indicated classification at 0, 40 and the remaining (80 - 240) days. The best calibration model for PV yielded a SEP (standard error of prediction) of 0.46 meq.kg", correlation coefficient (r) of 0.95, bias of 0.02 and a root mean square error of prediction (RMSEP) of 0.46 meq.kg". The CD calibration model had a correlation coefficient of 0.89, SEP of 0.01 %, bias of 0.001 and RMSEP of 0.01% when developed on a data set with no pre-processing applied. The AV calibration had a SEP of 0.32 mmol.kg", bias of 0.03, RMSEP of 0.32 mmol.kg" and rof 0.93. The C18:2 and C18:3 models were built using partial least squares (PLS) regression and the values obtained for SEP were 0.31% and 0.054%, RMSEP 0.32% and 0.05%, bias 0.05 and 0.01 and correlation coefficcients were 0.82 and 0.54 respectively. The calibrations for CI8:1, C18:0 and C16:0 yielded weaker correlations. Good correlations were obtained when calibrating the CI8:2/CI6:0 and C18:2/CI8:0 ratios.
AFRIKAANSE OPSOMMING: Die oksidatiewe stabiliteit van ru, koud-geperste mango kern vet (MKV) (Mangifera indica L.) is oor 'n periode van 240 dae bepaal deur gebruik te maak van die peroksiedwaarde (PV), gekonjugeerde dieen waarde (CD) en p-anisidien waarde (AV) toetse. Die veranderinge in die vetsuurprofiel is gemonitor deur gaschromatografie en die oksidatiewe status van MKV is akkuraat voorspel word deur Fourier transformasie naby infrarooi (FT-NIR) spektroskopie. Die resultate van die verskillende toetsmetodes komplementeer mekaar goed en dui die stabiliteit van mango kern vet teen oksidatiewe verval aan. Die vetsuurprofiel is saamgestel uit palimitiensuur (C16:0; 8.43%), steariensuur (C18:0; 34.98%), oleïensuur (C18:1 cis; 48.05%), linoleïensuur (C18:2; 6.60%) en aragiedsuur (20:0; 1.73%). Spoorhoeveelhede C16:1 (0.56%), C18:1 trans (0.25%), C18:3 (0.43%), C20:1 (0.25%) en C22:0 (0.40%) is ook geïdentifiseer. Die vars geperste MKF het 'n peroksiedwaarde van 2.7 meq.kg", 'n CD waarde van 0.07% en 'n AV waarde van 2.2 mmol.kg" getoon. Na afloop van 40 dae opbergingsperiode by 5, 15, 25 en 40°C het die PV van MKV met 'n beperkte blootstelling aan suurstof na 5 meq.kg" vermeerder, terwyl die waardes van monsters sonder suurstofblootstelling na 4 meq.kg" vermeerder het. Emulsifisering van MKV het 'n stabiliserende effek (maksimum PV = 2.8 meq.kg") terwyl blootstelling aan ultraviolet (UV) lig 'n kataliserende effek (maksimum PV = meq.kgl ) op oksidasie gehad het. Hierdie maksimum waardes het na 40 dae afgeneem. Die CD waardes van MKF monsters opgeberg by 5, 15, 25 en 40°C en met beperkte blootstelling aan suurstof het vermeerder tot 0.18% terwyl die monsters sonder suurstofblootstelling by bogenoemde temperature vermeerder het tot 0.16% na 40 dae. Die gekonjugeerde dieen waardes van die monsters blootgestel aan UV lig het vermeerder tot 0.20%; terwyl die geëmulsifiseerde monsters waardes soortgelyk aan die MKV monsters sonder blootstelling aan suurstof getoon het. Gekonjugeerde dieen waardes het gestabiliseer vanaf dag 40. Die p-anisidienwaardes van MKV monsters opgeberg by temperature van 5,15, 25 en 40°C, met en sonder blootstelling aan suurstof, het varieer tussen 0.5 en 5 mmol.kg". Die swak korrellasie tussen nonanal produksie en p-anisidienwaardes, sowel as die klein hoeveelhede 2-alkenale geproduseer, was verantwoordelik vir hierdie lae en nie linêere waardes. Die peroksied, gekonjugeerde dieen en p-anisidienwaardes wat verkry is nadat MKV by 25°C in 240 opgeberg is, was laag weens die klein persentasie poli-onversadigde vetsure teenwoordig in die vet. Dit vergelyk goed met die hoë waardes wat verkry is vir sonneblom-, canola- en olyfolie wat almal ryk aan poli-onversadigde vetsure is. Die minimale veranderinge in die vetsuurprofiel van MKF dui op die stabiliserende invloed van versadigde vetsure (C16:0 en C18:0) en oleïensuur. Die onstabiliteit van linoleïen- en lineensuur duidelik uit hierdie vetsure se oksidatiewe verval. 'n Afname van 7.41% en 12.80% is waargeneem tussen dae 0 en 240 vir die C18:2/C16:0 en C18:2/C18:0 verhoudings, onderskeidelik. Die voorspelling van die oksidatiewe status van die MKF monsters met behulp van FT-NIR spektroskopie was moontlik deur die ontwikkeling van kalibrasie modelle. 'n Totale datastel van 300 monsters, waarvan ongeveer 'n derde vir validasie aangewend is, is gebruik vir die kalibrasiemodelle. Met behulp van PCA (hoojkomponent analise) kon drie klassifiseerbare groepe by 0, 40 en 80-240 dae onderskei word. Die beste kalibrasiemodel vir PV het 'n standaardfout van voorspelling (SEP) van 0.46 meq.kg", 'n korrellasiekoëffisient (r) van 0.95, 'n oorhelling van 0.02 en 'n standaardfout van voorspelling (RMSEP) van 0.46 meq.kg" gehad. Die CD kalibrasiemodel (geen voorafverwerking) het 'n r van 0.89, SEP van 0.01% oorhelling van 0.001 en RMSEP van 0.01% gehad. Die AV kalibrasie het 'n SEP van 0.32 mmol.kg', oorhelling van 0.03, RMSEP van 0.32 mmol.kg" en r van 0.93 gehad. Die C18:2 en C18:3 modelle is saamgestel deur PLS (partial least squares) regressie. Waardes verkry vir C18:2 en C18:3 was onderskeidelik: SEP 0.32% en 0.05%, RMSEP, 0.32% en 0.05%, oorhelling 0.05 en 0.01 en r 0.82 en 0.54. In die geval van C18:1, C18:0 en C16:0, het die kalibrasies swakker statistiek korrellasies getoon. Goeie korrellasies is verkry tydens kalibrasie vir die C18:2/C16:0 en C18:2/C18:0 verhoudings.
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Li, Hui 1970. "Analysis of edible oils by Fourier transform near-infrared spectroscopy." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36819.
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Fourier transform near-infrared (FT-NIR) spectroscopy was investigated as a means of quantitative analysis of edible fats and oils. Initially, a method of simultaneously determining the cis and trans content, iodine value and saponification number of neat fats and oils using a heated transmission flow cell was developed. Two partial least squares (PLS) calibrations were devised, a process-specific calibration based on hydrogenated soybean oil and a more generalized calibration based on many oil types, the latter able to analyze oils from a variety of sources accurately and reproducibly. Methodology for the quantitative determination of the peroxide value (PV) of edible oils using a novel glass-vial sample handling system was subsequently developed, based on the stoichiometric reaction of triphenylphosphine with hydroperoxides to form triphenylphosphine oxide. The PV calibration was derived using PLS regression, and the results of a validation study demonstrated that PV could be quantitated accurately if a normalization routine was used to compensate for the inherent dimensional variability of the vials. The vial sample handling system was then used in the development of PLS IV calibrations for the process analysis of commercial oil samples, and these samples were also used to evaluate a global IV calibration devised by Bomem Inc. The discriminant features available through PLS were shown to enhance the accuracy of the IV predictions by facilitating the selection of the most appropriate calibrations based on the spectral characteristics of closely related oils. The predictions obtained using the global IV calibration provided clear evidence that a generalized calibration based on a large and varied selection of oils could provide a means of IV determination by FT-NIR spectroscopy. Subsequently, a generalized FT-NIR trans calibration was developed and shown to yield trans values that were in good agreement with those obtained by the AOCS mid-FTIR single-bounce hori
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Zamani, Younes. "Determination of physical characteristics of food fats." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0007/MQ44324.pdf.
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Lazarick, Kelsey. "Cause of color component formation in oils during frying." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2012, 2012. http://hdl.handle.net/10133/3303.
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Color formation in oils during frying is one of the most noticeable degradation
reactions that occur in the frying oil. Degradation reactions cause formation of products that positively and negatively impact the nutritional and sensory qualities of both the food being fried and the frying oil. The origins of these pigment forming reactions in the oil and the factors affecting these reactions are not well understood. Assessments of the mechanisms, the components involved and external conditions affecting oil darkening were conducted. The effect of basic food ingredients, commercially sold and laboratory formulated breading and battering, preformed lipid hydroperoxides and phospholipids on color formation and oil degradation of the frying oil were investigated.
Protein products, specifically whey protein, caused both the fastest darkening and
thermo-oxidative deterioration of the frying oil. This breakdown was aided further through
the addition of minor food materials such as glucose and amino acids as well as lipid
hydroperoxides in concentrations greater than 5 % of the frying oil. Nonenzymatic browning is the main reaction causing color formation in the frying oil and utilizes carbonyls from the food product such as starches, sugars and lipid oxidation products as starting materials alongside amino groups from proteins and amino acids. Breading ingredients contributed to oil color formation due to particles from the food crust breaking off into the frying oil to further accelerate browning reactions. Increasing the temperature of the frying oil provided additional stimulus for color forming and thermo-oxidative reactions to progress at a faster rate.xv, 184 leaves : ill. ; 29 cm
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Rindt, Allyson. "Consumer acceptance of cranberry seed oil in several food formulations." Online version, 2008. http://www.uwstout.edu/lib/thesis/2008/2008rindta.pdf.
Full textBooks on the topic "Oils and fats, Edible Oxidation"
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Lipid oxidation: Challenges in food systems. Urbana, Illinois: AOCS Press, 2013.
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Boskou, Dimitrios, and I. Elmadfa. Frying of food: Oxidation, nutrient and non-nutrient antioxidants, biologically active compounds and high temperatures, second edition. 2nd ed. Boca Raton: CRC Press, 2010.
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Dimitrios, Boskou, and Elmadfa I, eds. Frying of food: Oxidation, nutrient and non-nutrient antioxidants, biologically active compounds, and high temperatures. Lancaster, Pa: Technomic Pub. Co., 1999.
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Fats and oils. St. Paul, Minn., USA: Eagan Press, 1996.
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Porta, Richard A. Della. Edible oils manual. 2nd ed. Champaign, IL (P.O. Box 3489, Champaign 61826-3489): AOCS Press, 2006.
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Creber, Ann. Oils. Edited by Williams Chuck. San Francisco, CA: Weldon Owen, 1994.
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Oils. Rutland, Vt: C.E. Tuttle, 1992.
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Fats and oils handbook. Champaign, Ill: AOCS Press, 1998.
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Creber, Ann. Oils. London: Angus & Robertson, 1991.
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Edible oil processing. Chichester, West Sussex: John Wiley & Sons Inc., 2013.
Find full textBook chapters on the topic "Oils and fats, Edible Oxidation"
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Knochen, Moisés, and Germán Morales. "Edible fats and oils." In Handbook of Mineral Elements in Food, 573–86. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118654316.ch24.
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Fedeli, Enzo, and Giulio Testolin. "Edible Fats and Oils." In The Mediterranean Diets in Health and Disease, 125–34. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-6497-9_6.
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Belitz, H. D., W. Grosch, and P. Schieberle. "Edible Fats and Oils." In Food Chemistry, 643–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07279-0_15.
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Belitz, H. D., and W. Grosch. "Edible Fats and Oils." In Food Chemistry, 602–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-07281-3_15.
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Danthine, Sabine. "Fats and Oils: Physicochemical Properties of Edible Oils and Fats." In Handbook of Molecular Gastronomy, 295–97. First edition. | Boca Raton: CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9780429168703-43.
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Marikkar, J. M. Nazrim. "Adulteration in Oils and Fats Industry." In Recent Advances in Edible Fats and Oils Technology, 463–80. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5113-7_17.
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Rossell, J. B. "Development of purity criteria for edible vegetable oils." In Lipid Analysis in Oils and Fats, 265–89. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4613-1131-7_8.
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Goh, Kok Ming, Kar Lin Nyam, and Chin Ping Tan. "Processing Contaminants in Edible Oil." In Recent Advances in Edible Fats and Oils Technology, 379–94. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5113-7_14.
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Chong, Wai-Ting, Yee-Ying Lee, Teck-Kim Tang, and Eng-Tong Phuah. "Minor Components in Edible Oil." In Recent Advances in Edible Fats and Oils Technology, 141–87. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5113-7_5.
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Prevot, André. "Residues and Contaminants in Edible Fats and Oils." In Fat Production and Consumption, 291–304. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4615-9495-6_28.
Full textConference papers on the topic "Oils and fats, Edible Oxidation"
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Cho, Karin, Nuria Acevedo, and Rodrigo Tarte. "Characterization of the mechanical properties, freeze-thaw stability, and oxidative stability of edible, high-lipid rice bran wax-gelatin biphasic gels." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/umbu8998.
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Although some consumers have a negative connotation of fats in food products, fats provide a unique mouthfeel, texture, and flavor to foods. Biphasic gels, which are semi-solid systems composed of two generally immiscible systems, were investigated as they may offer a potential solution to remove or reduce semi-solid fats in foods without sacrificing functionality. Edible biphasic gels with high lipid fractions ( >50%) were developed and characterized. The gels consisted of gelatin in aqueous buffer (hydrogel; HY), and rice bran wax in high-oleic soybean oil (oleogel; OE). The OE:HY ratios prepared were  40:60, 50:50, 60:40, and 70:30. Thermal analysis was performed with differential scanning calorimetry. Freeze-thaw stability of the gels was studied by rheology, liquid loss measurement, and microstructural characterization before and after one freeze-thaw cycle. Biphasic gels were also stored for approximately 6 months under accelerated oxidation conditions at 22°C to assess oxidative stability through PV analysis. The combination of HY and OE led to superior systems compared to the individual gel components. The yield stress (s*) values for biphasic gels were greater than for OE alone, and increased as the proportion of HY increased. CLSM showed that the HY was the continuous phase for all ratios. After exposure to one freeze-thaw cycle, biphasic gels showed no visual differences, a reduced water loss and an increase in G’ when compared to pure HY. Oxidative stability of the biphasic gels was shown by the low PV (less than 3 meq/kg) after the storage period. By changing the OE:HY, the biphasic gel can be tailored as semi-solid fat replacers with desired properties and good overall stability. The findings from this study demonstrate the improved functionality of oils by formulating into a biphasic gel system, thus potential to replace semi-solid fats.
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Sobolev, Roman, Yuliya Frolova, Varuzhan Sarkisyan, and Alla Kochetkova. "Study of the Oxidative Stability of Oleogels Structured with Beeswax Fractions." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/zbfu3245.
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Combining the beeswax fractions is an effective way of structuring edible oils. However, their effect on oleogel oxidative stability is still not studied. Thus, the study on the influence of beeswax and combinations of its fractions on the edible oleogels oxidation was the objective of this research.Four fractions of beeswax (A, B, C, D) were isolated using preparative flash-chromatography and characterized by TLC and HPLC-ELSD. Sunflower oil was used to prepare oleogels (at 90 °C for 30 minutes) with a 6% of gelator. The fatty acid composition was evaluated by GC. The samples were stored at 35°C for 20 days, monitoring the oxidation using: PV, AV, CDV, TOTOX, HS-SPME-GC-MS. The induction period was determined using the OXITEST reactor.We have shown that fraction A contained hydrocarbons ( >99%); B - monoesters ( >95%); C - wax esters ( >66%), alcohols ( >29%), and free fatty acids ( >4%); D - alcohols ( >49%), free fatty acids ( >40%) and wax esters ( >10%). Combinations of A+B, A+B+C, and A+B+D gelators were made using fractions in equal amounts. The fatty acid composition of freshly prepared oleogels and oil didn't differ (p >0.05). Sunflower oil had the best oxidative stability among all samples. The A+B-based oleogel had the highest oxidative stability among the oleogels. Hexanal is shown to be the main volatile organic compound formed during the oxidation of sunflower oil. The volatile compounds profile of the oleogels also included ketones, alcohols, and terpenes. Beeswax-based oleogel had the lowest induction period, which indicates the presence of prooxidant components. A close correlation was found between the oxidation rate of oleogels and the content of free fatty acids (r2=0.8195) in the gelator.This study shows that the use of beeswax fractions, compared to beeswax itself, results in fat-containing products with higher oxidation stability.
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Munoz, Juan Fernando. "High oleic palm oil: Uses and applications." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/eoga3312.
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High oleic palm oil (HOPO) is the result of an agricultural innovation. A non-GMO palm, more resistant to diseases such as bud rot, with a higher oil yield per area than E.guineensis palm, was obtained. Its oil is mostly unsaturated; its oleic acid content is 10-15% higher compared to African palm oil. It has a higher content of beta-carotene (pro-vitamin A) and natural antioxidants such as tocotrienols and tocopherols (Vitamin E).HOPO can be refined by a special process that allows the oil to retain most of the nutritional components that are present in the crude oil. A refined red colored oil is obtained, with high beta-carotene and vitamins content, which can be fractionated to produce red oleins and stearins, for various applications where its color and nutritional value can be exploited.The objective of this conference is to share our experience in the use and commercialization of HOPO, highlighting its advantages in the formulation of edible oils and in industrial applications.High oleic red palm olein can be used as a cooking oil in households, imparting a pleasant reddish-gold color to food. Both red olein and stearin can be used in the production of baked goods, allowing these foods to retain part of the vitamins given by the oil, and as a source of natural beta-carotene.Traditionally refined high oleic palm olein, being more unsaturated than E. guineensis palm olein, is more resistant to crystallization in cold climates, which allows it to replace imported seed oils in edible oil formulas. Industries that produce snacks and fried foods also use this oil due to its high resistance to oxidation and its lower content of saturated fatty acids than traditional palm olein, facilitating the production of shortenings reduced in saturated fat, which is increasingly required by different industries in Latin America.
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Ullmann, Tai. "Sustainability opportunities in edible oils and fats supply chain." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/doyk7304.
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At Cargill, our ambition is to build the most sustainable food supply chains in the world. From small family farms to global shipping lanes, Cargill works every day to implement new sustainable practices to reduce our impact on the planet and protect people. We know that we must address climate change and conserve water and forests, while meeting the rising demand for food. These are complex challenges, but we have overcome many obstacles to keep our food system resilient and we will continue. We feel a deep responsibility to protect the planet and its people, to ensure a cleaner, safer future for generations to come.We’ve set priorities that account for the diverse environmental, social and economic impacts of our business with clear goals to ensure progress in line with what the science says is needed to keep our people and planet thriving:· Climate: reduce greenhouse gas emissions in our operations by 10% by 2025 and reduce emissions in our supply chain by 30% per ton of product sold by 2030.· Land: transform our agricultural supply chains to be deforestation free by 2030· Water: achieve sustainable water management in our operations and all priority watersheds· Human Rights: promote and respect human rights as outlined in the Universal Declaration of Human Rights and improve the livelihoods of 10 million farmers by 2030 through training insustainable agriculture practices and better access to marketsOur global edible oil solutions are a key part of this ambition. From our new RegenConnect program for soybean oil to our RSPO Segregated palm oil products, we continue to drive sustainability progress against our priorities. But, we cannot do this alone. Through connection and collaboration with farmers, our customers, and global and local communities, we believe our food system will remain resilient.
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Galberd, Zachary, and Eric Appelbaum. "Filter Media Options in Renewable Fuels and Edible Oils." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/gdwg6339.
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With the additional capacity being brought on in the biofuel space, additional filter media options must be considered. Adding capacity to the North American Diatomaceous Earth (DE) marketplace is a challenge but perlite and cellulose are viable alternatives. Both Biodiesel and Renewable Diesel are derived from fats and oils. These fats and oils can often present processing challenges due to contaminants that interfere with the efficiency of the reaction which need to be treated with adsorbent clays to protect catalyst activity. The use of DE, perlite or cellulose will improve the performance of the leaf filters, which also improves the performance of safety and polish filters. DE is the most well-known filter aid in this space, the use of perlite and cellulose offers many strategic benefits. Perlite offers greater efficiencies and economies than DE when used as a precoat for the treatment of fats and oils. Cellulose although not the most economical option, offers additional benefits that can counter its higher cost. This presentation looks at perlite and cellulose as alternatives to DE and highlight the benefits of each of them.
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Kuhlmann, Jan, and Nicolaus von Mouillard. "Solutions for modern routine analysis of mycotoxins in edible oils." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/pbep9435.
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Mycotoxins are a large and heterogenic group of biogenic organic compounds that can impact the quality and safety of foods. Due to the diversity of fungi, different kinds of foods are affected by different mycotoxins. Some of them have received special attention due to their high frequency of occurrence or due to their toxicity. For example, aflatoxin B1 is genotoxic and one of the most carcinogenic biogenic compounds known so far. Hence, it is not surprise that several authorities worldwide have set maximum levels for this compound as well as for the most relevant further mycotoxins in certain foods, making analysis of regulated mycotoxins a common part of quality control in recent food business. As the most relevant mycotoxins regularly occur in grains, seeds, nuts and fruits, well established and validated techniques for extraction and analysis are available for these matrices. Mainly HPLC approaches or, less abundant, GC techniques are applied and frequently derivatization is part of the analysis. With respect to their mainly polar nature, most mycotoxins are not considered to occur in significant amounts in refined edible oils and fats. This might be the reason that not as much attention has been spent on method development and validation for their determination in edible oils. However, in terms of quality control during food processing and in order to monitor removal of undesired compounds from raw materials, the routine analysis of mycotoxins in edible oils and fats has become an important topic. In this presentation, an accredited in-house validated LC-MS routine method for the parallel determination of Aflatoxins, Ochratoxin-A and 9 Fusarium-toxins in edible oils & fats and various seeds, nuts, fruits and compound foods is introduced.
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Papastergiadis, Antoinos, and Wim de Greyt. "MOSH/MOAH in edible oils and fats: current status and mitigation solutions." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/mcyo3900.
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Mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH) are main constituents of mineral oil-based lubricants that can find their way into food through various points in the production chain. Studies on contamination of oils and fats with MOSH and MOAH have progressed enough and it is now evident that in the coming years monitoring and mitigation measures will be implemented in the oils and fats industry. Accurate characterization and quantification of these contaminants is now possible, allowing to further study and assess consumer exposure and eventually establish regulatory limits. At the same time, the industry has already started to understand better how to avoid contamination and which unit operations can remove contaminants already present in the raw feedstocks. In this presentation critical information on the nature, analysis, occurrence and regulatory status of MOSH and MOAH as well as possible ways to avoid contamination will be discussed. Furthermore, available technological solutions for mitigation during edible oil refining will be presented.
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Kuhn, Susanne, and Michael Koch. "Recent analytical methodologies for the determination of MOSH/MOAH in edible oils & fats." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/jwfv6121.
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As an undissolved complex mixture, petroleum hydrocarbons pose a special challenge not only to toxicologists. Since this contaminant was first detected to migrate from cardboard packaging into foods in 1995, toxicological knowledge, methodology and awareness of petroleum sources have evolved. Likewise, the requirements for an analytical method in-creased. The risks of aromatic petroleum hydrocarbons (MOAHs), and in particular 3-7 ring MOAHs, has been increasingly emphasized by EFSA. Edible oils and fats are among the foods at high risk for mineral oil contamination. They are also one of the most difficult matrices. Typical interference from squalene, carotenoids, and other terpenic structures must be re-moved prior to quantification of MOAH by LC-GC-FID. Epoxidation, as the method of choice, is a crucial step in the removal of these biogenic interferences. This sample preparation step has recently been revised and improved. During the talk, the latest improvements of the epoxidation procedure will be presented with examples from a service laboratory. Furthermore, the advantages of GCxGC technology to evaluate the toxicological relevance of the MOAH fraction will be addressed.
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Mandziuk, I., and K. Prisyazhna. "BASE OILS BASES SYNTHESIZED USING TECHNOLOGIES OF RECYCLING WASTE PRODUCTS OF THERMOPLASTICS." In BALTTRIB 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/balttrib.2015.07.
Full textAbstract:
We offer the technology of synthesis of the basic foundations of lubricants from natural raw materials – animal and vegetable fats. The relevance and novelty of the research is to use the technology of recycling polymer waste. This allows adjusting the rheological, physical, mechanical properties of lubricants. We propose a method to estimating the propensity to oxidation of natural fats based rheometric measurements. We studied the efficiency of the various classes of industrial antioxidants.
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Kivevele, Thomas, Avinash Kumar Agarwal, Tarun Gupta, and Makame Mbarawa. "Oxidation Stability of Biodiesel Produced from Non-Edible Oils of African Origin." In SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-01-1202.
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