Letteratura scientifica selezionata sul tema "Extraits aqueux"
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Articoli di riviste sul tema "Extraits aqueux":
Mohammed, B., M. M. Adua, S. E. Alu, D. Gambo, S. I. Musa e R. A. Ofukwu. "Comparative efficacy of amprolium and crude extracts of Prosopis africana leaf for the treatment of West African dwarf goats infected with coccidial oocysts". Nigerian Journal of Animal Production 49, n. 1 (25 febbraio 2022): 124–30. http://dx.doi.org/10.51791/njap.v49i1.3410.
TANGARA, Dougoutigui, Amadou DIOP, Harouna TIRERA, Benoît Yaranga KOUMARE, Mohamed El Bechir NACO, Djibril FALL, Serigne Omar SARR e Yérim Mbagnick DIOP. "Borreria verticillata plante médicinale sénégalaise : Étude de l'activité antioxydante d'extraits méthanoliques, chloroformiques, aqueux et acétates de la plante entière (racine, tige, feuille, fleurs)". Journal of Applied Biosciences 171 (31 marzo 2022): 17812–20. http://dx.doi.org/10.35759/jabs.171.4.
Agban, Amégninou, Yao Hoekou, Passimna Pissang, Tchadjobo Tchacondo e Komlan Batawila. "Evaluation du potentiel antimicrobien et de la toxicité des extraits de Jatropha multifida Linn, (Euphorbiaceae)". Journal of Applied Biosciences 151 (31 luglio 2020): 15550–58. http://dx.doi.org/10.35759/jabs.151.4.
Allou Isidore, SARAKA, ABO Kouabenan, OUATTARA Katinan Etienne e ZIRIHI Guédé Noël. "Étude botanique, tri phytochimique et évaluation in vitro de l’activité antifongique des extraits de feuilles de Mallotus oppositifolius (Geisel.) Müll. Arg (Euphorbiaceae) sur Fusarium sp. et Phytophthora sp. deux champignons phytopathogènes". Journal of Animal & Plant Sciences 41.2 (31 agosto 2019): 6903–15. http://dx.doi.org/10.35759/janmplsci.v41-2.4.
BELLO, Saliou, K. A. COULIBALY, O. A. BABALAKOUN e J. ZOUNDJIHEKPON. "Efficacité d’extraits aqueux de plantes pour le contrôle des thrips sur différents cultivars de niébé (Vigna unguiculata) au Nord-Ouest du Bénin". Annales de l’Université de Parakou - Série Sciences Naturelles et Agronomie 9, n. 1 (30 giugno 2019): 107–22. http://dx.doi.org/10.56109/aup-sna.v9i1.67.
Yao, Brou Lazare, Dessan Obed Gogoue, Paul Marius Nando Nando e Kablan Tano. "Etude comparée de l’efficacité des extraits aqueux de feuilles d’eucalyptus (Eucalyptus camaldulensis) et des graines de neem (Azadirachta indica Juss) contre les principaux ravageurs de chou". International Journal of Biological and Chemical Sciences 16, n. 2 (8 luglio 2022): 581–92. http://dx.doi.org/10.4314/ijbcs.v16i2.6.
Piba, Serge Cherry, Pierre Alain Kouassi Konan, Losséni N’gana Kone, Amoin Gervaise Kouame, Richard Kouakoubah Donthy Kouakou e Honora Fezan Bi Tra. "Phytochimie, activité antioxydante et toxicité aiguë de plantes médicinales utilisées contre les séquelles de l’accident vasculaire cérébral en Côte d’Ivoire". International Journal of Biological and Chemical Sciences 15, n. 2 (22 giugno 2021): 652–63. http://dx.doi.org/10.4314/ijbcs.v15i2.21.
Ali-Emmanuel, N., M. Moudachirou, A. J. Akakpo e J. Quetin Leclercq. "Activités antibactériennes in vitro de Cassia alata, Lantana camara et Mitracarpus scaber sur Dermatophilus congolensis isolé au Bénin". Revue d’élevage et de médecine vétérinaire des pays tropicaux 55, n. 3 (1 marzo 2002): 183. http://dx.doi.org/10.19182/remvt.9822.
Hervé Narcisse, Bayaga, Guedje Nicole Marie, Tabi Omgba Yves, Pola Yissibi Emilienne, Njinkio Nono Borgia Legrand, Assong Elombat Danielle Cynthia, Fokunang charles e Ntsama Essomba Claudine. "Pouvoir antibactérien des extraits aqueux et hydroéthanolique du mélange d’écorces de tronc d’Albizia gummifera (J.F. Gmel.) C.A. Sm et Spathodea campanulata P.Beauv". Journal of Applied Biosciences 154 (31 ottobre 2020): 15881–87. http://dx.doi.org/10.35759/jabs.154.5.
DIEYE, Pape Issakha, Seni NDIAYE, Fode DIONE, Abdoulaye DIOP, Assane DIENG, Amadou DIOP, Bara NDIAYE, Yerim Mbagnick DIOP e Serigne Omar SARR. "Étude corrélée de l’activité antibactérienne et antifongique des extraits de Jatropha chevalieri et de Cordylla pinnata, et de leurs profils chromatographiques". Journal of Applied Biosciences 159 (31 marzo 2021): 16396–410. http://dx.doi.org/10.35759/jabs.159.4.
Tesi sul tema "Extraits aqueux":
Bensaid, Aicha. "Propriétés anti-oxydants, anti-inflammatoires et antispasmodiques d’Ocimum basilicum". Electronic Thesis or Diss., Université de Montpellier (2022-....), 2022. http://www.theses.fr/2022UMONG091.
Basil Ocimum basilicum L is an herbaceous, aromatic, and food crop, which is used fresh or processed in some culinary preparations, thus in traditional medicine. The different parts of this plant present very important biological properties for human health due to their richness in bioactive compounds. The objective of this work is based on the differential characterization of the phytochemical profile of the stems and leaves of Ocimum basilicum and the evaluation of its antioxidant, anti-inflammatory, and antispasmodic properties. The basil extracts showed different phytochemical profiles, and the evaluation of these antioxidant effects by DPPH and ORAC assay showed that the ethanolic extracts had a higher activity compared to the aqueous extracts. The study of the anti-inflammatory effects of ethanolic extracts of basil stems and leaves in vitro in a macrophage J774 cell model stimulated by LPS/IFNγ showed that both extracts had an inhibitory effect on the production of inflammatory mediators (nitric oxide, interlukin-6, prostaglandin E2, Monocyte chemoattractant protein-1), but increased the production of the pro-inflammatory cytokine TNFα (Tumour necrosis factor-alpha). Subsequently, the aqueous extracts showed a relaxing effect on rat intestinal smooth muscle. The results of this study indicated that both parts of basil leaves and stems have interesting biological effects that can be valorized in terms of nutrition and health
Francezon, Nellie. "Valorisation de l'écorce de Picea mariana par la production d'extraits naturels : les extraits aqueux et l'huile essentielle". Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/30953.
The transformation of black spruce Picea mariana, abundantly operated for the quality of its lumber in Quebec, generates huge volumes of residual bark in sawmills. With the objective of transforming the resource and designing innovative products and systems, this doctoral project has developed a process for converting forest biomass through the complete conversion of black spruce bark, using eco-friendly solvents. This process incorporating two different types of extractions (hydrodistillation and hot water extraction) simultaneously produces three natural extracts, the essential oil and hydrosol capturing the fragrance of black spruce and the hot water extract enriched with antioxidant polyphenols. The elucidation of the chemical composition of black spruce bark essential oil and hydrosol has revealed more than fifty volatile and aromatic compounds belonging to the terpenoid family. In addition, the fragrance of the essential oil is very different from the one produced industrially from the needles. It could thus constitute a new product for the perfume and aroma sectors. The aqueous crude extract, on the other hand, is rich in antioxidant polyphenols, tannins and sugars. Phenolic compounds of low molecular weight mainly belong to the stilbene family, including trans-isorhapontin, trans-resveratrol, trans-piceide and trans-astringin. Two new molecules have also been discovered in this extract: two stereoisomers of stilbene, called piceasides O and P. In order to optimally recover these molecules of interest, an optimization of the hot water extraction has made it possible to highlight the best extraction parameters. Thanks to a statistical approach involving chemometrics, the temperature 80 °C and the bark/water ratio 50 mg/mL were determined to be the most effective parameters for enriching the aqueous extract with polyphenols of interest. Thus, three high value-added products are extractable from the bark of black spruce. But the most interesting at an industrial level is that they can be extracted simultaneously via the integrated process whose development has validated the yields and chemical compositions while ensuring the availability of residual bark for combustion. This doctoral project offers a solution for an efficient management of co-products of wood processing through a green process, producing three natural products with high added value. The cosmetic and health nutrition sectors, constantly in search of new natural ingredients, may be interested in marketing these extracts as skin actives or as antioxidant dietary supplements. Molecules of therapeutic interest such as resveratrol and its derivatives identified in the aqueous extract could also be used by the pharmaceutical industry. Essential oil and hydrosol could enrich the perfumer's palette or be used as aromas.
Aboura, Ikram. "Effet anti-inflammatoire et anti obésité des extraits polyphénoliques de feuilles de caroube "Ceratonia siliqua" et cladode de figuier de barbarie "Opuntia ficus-indica"". Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCK027/document.
In the present study, we have investigated the effects of polyphenol-rich infusions from carob leaves and OFI-cladodes on inflammation associated with obesity and dextran sulfate sodium (DSS)-induced ulcerative colitis in Swiss mice. In vitro studies revealed that aqueous extracts of carob leaves and OFI-cladodes exhibited anti-inflammatory properties marked by the inhibition of , TNF-α and nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells concomitant with NF-κβ nucleus translocation inhibition. For in vivo investigations, Swiss male mice were subjected to control or high fat diet (HFD). At the 4th week after the start of study, animals received or not 1% infusion of either carob leaves or OFI-cladode for 6 weeks and were subjected to 2% DSS administration in drinking water over last 7 days. After sacrifice, pro-inflammatory cytokines levels in plasma and their mRNA expression in different organs were determined. Results showed that carob leaf and OFI-cladode infusions reduced inflammation severity associated with HFD-induced obesity and DSS-induced acute colitis indicated by decrease in pro-inflammatory cytokines expression (as such TNF-α, IL1b and IL-6) in colon, adipose tissue and spleen. In addition, plasma levels of IL-6 and TNF-α were also curtailed in response to infusions treatment. Thus, carob leaf and OFI-cladode infusions prevented intestinal permeability through the restoration of tight junction proteins (Zo1, occludins) and immune homeostasis. Hence, the anti-inflammatory effect of carob leaves and OFI-cladodes could be attributed to their polyphenols which might alleviate inflammation severity associated with obesity and colitis
Agustini, José Antonio. "Extratos vegetais obtidos de espécies nativas do Cerrado brasileiro no controle do ácaro-rajado (Tetranychus urticae Koch) /". Ilha Solteira, 2017. http://hdl.handle.net/11449/151887.
Resumo: O ácaro rajado, Tetranychus urticae Koch, é uma praga que ataca várias culturas em todo o mundo. Seu controle é feito basicamente por acaricidas químicos sintéticos. O uso inadequado de defensivos agrícolas, além de acarretar problemas ao meio ambiente, ao trabalhador e ao consumidor, pode levar ao desenvolvimento de populações de pragas resistentes aos seus princípios ativos. Extratos vegetais têm sido estudados na busca de novos princípios ativos que causem menos problemas ambientais, ocupacionais e de saúde humana, e que possam fazer parte de programa de manejo integrado de pragas e doenças. As florestas brasileiras são constituídas por uma grande diversidade de plantas que podem apresentar metabólitos secundários interessantes com propriedades biocidas. O objetivo deste estudo foi avaliar extratos aquosos e hidroetanólicos de folhas e cascas de doze espécies vegetais nativas do Cerrado brasileiro quanto à atividade acaricida e ao efeito sobre a fecundidade de fêmeas do ácaro-rajado, T. urticae. De cada espécie vegetal foram avaliados dois órgãos (folhas e cascas), duas épocas de coletas (primavera/verão e outono/inverno) além de dois tipos de solventes (água e etanol 70%). Os extratos foram aplicados por pulverização em torre de Potter, avaliando-se mortalidade, repelência e oviposição após 120 horas. Todas as doze espécies apresentaram atividade acaricida significativa sobre T. urticae, dependendo da época de coleta, do material vegetal e do solvente utilizado. Em nove e... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The two-spotted spider mite, Tetranychus urticae Koch, is a pest that attacks various crops throughout the world. The mites control is basically made by synthetic chemical acaricides. The inappropriate use of pesticides, besides causing problems to the environment, to the workers and the consumers, can lead to the development of populations of pests resistant to its active ingredient. Some pesticides such as neonicotinoids and pyrethroids have their origin in secondary plant metabolites such as tobacco and chrysanthemum, respectively. Plant extracts have been studied in the search for new active ingredients that cause less environmental, occupacional and human health problems, and that can be part of an integrated pest and disease management program. The Brazilian forests are constituted by a great plant diversity that can have interesting secondary metabolites with biocide properties. The objective of this study was to evaluate the mitecide activity of the aqueous and hydroethanolic extracts of leaves and bark of twelve native species from the Brazilian Cerrado and their effect on the fecundity of T. urticae mite females. Two plant organs (leaves and barks), two collection seasons (spring/summer and autumn/winter) were evaluated from each plant species, besides two types of solvents (70% ethanol and water). The extracts were applied by Potter tower spray, evaluating mortality, repellency and oviposition after 120 hours. All twelve species showed significant miticide activity... (Complete abstract click electronic access below)
Mestre
Santos, Alexander. "Verifica??o da atividade antif?ngica de extratos aquosos de Cymbopogon citratus, Peumus boldus e Shinus terebinthifolia sobre cinco esp?cies de fungos do g?nero Aspergillus". Universidade Federal Rural do Rio de Janeiro, 2008. https://tede.ufrrj.br/jspui/handle/tede/873.
This work was developed in the Department of Microbiology and Immunology of the Institute of Veterinary Rural Federal University of Rio de Janeiro in Serop?dica-RJ. We evaluated the antifungal activity plant Cymbopogon citratus (lemon-grass), Peumus boldus (boldo) and Shinus terebinthifolia (aroeira), inhibition of growth of species of the genus Aspergillus (A. flavus, A. niger, A. ochraceus, A. Parasiticus and A. carbonarius. Using the method of minimum inhibitory concentration in agar, with the technique of dilution plate (Pour-Plate), were held dilutions of different extracts, resulting in the final concentrations of 5%, 2.5% and 1.25%. Testing of commercial sensitivity to antifungal - ketoconazole were made in a final concentration of 1933.18 ? g /mL, as recommended by the National Committee for Clinical Laboratory Standards (NCCLS). The results obtained in the experiments have shown that aqueous extracts of C. citratus and S. terebinthifolia, after 24 hours of incubation, were able to inhibit the growth of A. flavus and A. carbonarius, respectively. The other extracts being studied and tested in the concentrations were not able to inhibit the growth of mycelial species of the genus Aspergillus.
Este trabalho foi desenvolvido no Departamento de Microbiologia e Imunologia do Instituto de Veterin?ria da Universidade Federal Rural do Rio de Janeiro, em Serop?dica-RJ. Foram avaliadas a atividade antif?ngica das plantas Cymbopogon citratus (capim-lim?o), Peumus boldus (boldo) e Shinus terebinthifolia (aroeira), na inibi??o do crescimento de esp?cies do g?nero Aspergillus (A. flavus, A. niger, A. ochraceus, A. parasiticus e A. carbonarius). Utilizando o m?todo da concentra??o inibit?ria m?nima em ?gar, com a t?cnica de dilui??o em placa (Pour-Plate), foram realizadas dilui??es dos diferentes extratos, obtendo-se as concentra??es finais de 5%, 2,5% e 1,25%. Testes de sensibilidade ao antif?ngico comercial - cetoconazol foram realizados numa concentra??o final de 1933,18 ?g/mL, conforme recomendada pelo National Committee for Clinical Laboratory Standards (NCCLS). Os resultados obtidos nos experimentos demonstraram que os extratos aquosos de C. citratus e S. terebinthifolia, ap?s 24 horas de incuba??o, foram capazes de inibir o crescimento de A. flavus e A. carbonarius, respectivamente. Os demais extratos em estudo e nas concentra??es testadas, n?o foram capazes de inibir o crescimento micelial das esp?cies do g?nero Aspergillus.
Carpanezzi, Fernando Bertol. "Investigação do potencial alelopático de Pittosporum undulatum Vent". Universidade Federal de São Carlos, 2009. https://repositorio.ufscar.br/handle/ufscar/1948.
Pittosporum undulatum Vent., an Australian tree implicated in supression of tree recruiment in many ecosystems, is found invading secondary Araucaria forests in subtropical Brazil. The first chapter of this study aimed to investigate the role of allelopathy in the invasive proccess, accessing germination and growth of Bauhinia forficata Link. in presence of secondary metabolites from cheesewood leaves. Leachates in concentrations of 20%, 15%, 10% and 5% (w/v), extracts from dry material (10%; 7,5%; 5% and 2,5%) and coumarin solutions (2,5 mM; 1,25 mM; 0,625 mM and 0,3125 mM) were prepared. Petri-dishes germination bioassays, with countings done at each 12 hours, allowed to determinate both germinabilty and germination rate; polyethylene glicol (PEG 6000) solutions were used to evaluate osmotic effects. For seedlings growth, the three highest concentrations of each solution were tested and after seven days root and shoot lenght were measured. While germinability was only sensitive to extracts from dry material, the germination rate showed a dose-dependent curve for all solutions. In seedlings, roots were the most sensitive structure and severe morfo-anatomic anomalies were observed. The main purpose of the second chapter was to investigate the use of Pittosporum undulatum Vent. (cheesewood) leaves as a possible sustainable alternative for barnyard grass control. Leachates in concentrations of 20%; 15%; 10%; 5% and 2,5% (w/v), aqueous extracts from powdered leachated and non- eachated leaves (10%; 7,5%; 5%; 2,5% and 1,25%), coumarin solutions (2,5 mM; 1,25 mM; 0,625 mM and 0,3125 mM) and Roundup Original® according to label informations were prepared. Polyethylene glycol were also used. Both germinability and germination rate were determined by germination biossays, with countings done at each 12 hours. In growth experiments, seedlings were exposed for seven days, when root and shoot length were measured. All solutions, with exception of coumarins, caused only small inhibitory effects on germination. In relation to the growth, all treatments but control caused necrose, absence of hairs and dose-dependent lenght reduction in radicles. Hipocotiles were affected by phenolic compound, extracts from non-leachated leaves and gliphosate. Although the allelopathic effects, ecophisiological aspects relative to Pittosporum undulatum still need to be cleared before its leaves can be used as a herbicide.
A árvore australiana Pittosporum undulatum Vent. (Pittosporaceae) é encontrada diminuindo o recrutamento de espécies nativas em formações secundárias de Floresta Ombrófila Mista no sul do Brasil. O objetivo do primeiro capítulo desse estudo foi verificar a ação alelopática da espécie no processo invasivo, investigando a sensibilidade de sementes e plântulas de Bauhinia forficata Link. (pata-de-vaca) à compostos foliares de pau-incenso. Foram preparados extratos aquosos lixiviados nas concentrações de 20%, 15%, 10% e 5% (m/v), extratos aquosos obtidos do pó de folhas lixiviadas (10%; 7,5%; 5% e 2,5% ) e soluções de cumarina a 2,5 mM; 1,25 mM; 0,625 mM e 0,3125 mM. Bioensaios em placas de Petri, com contagens realizadas a cada 12 horas, permitiram determinar a germinabilidade e velocidade de germinação; soluções de polietileno glicol (PEG 6000) foram preparadas para analisar os efeitos osmóticos. Nos bioensaios de crescimento, utilizaram-se as três concentrações mais elevadas de cada solução, sendo, após sete dias, medidos o comprimento radicular e de parte aérea. Enquanto a germinabilidade mostrou-se sensível apenas aos extratos de pó de folhas, a velocidade de germinação apresentou resposta dose-dependente para todas as soluções testadas. Quanto ao crescimento, a radícula foi a estrutura mais sensível aos efeitos alelopáticos, sendo observadas alterações morfo-anatômicas. No segundo capitulo, objetivou-se investigar o uso de material foliar de pau-incenso como alternativa ao manejo do capim-arroz, uma gramínea resistente a herbicidas que traz problemas a plantações de arroz e à biodiversidade de planícies úmidas em todo o mundo. Foram preparados extratos aquosos foliares lixiviados nas concentrações de 20%; 15%; 10%; 5% e 2,5% (m/v), extratos aquosos obtidos do pó de folhas lixiviadas e não-lixiviadas (10%; 7,5%; 5%; 2,5% e 1,25%), soluções de cumarina a 5mM; 2,5 mM; 1,25 mM; 0,625 mM e 0,3125 mM e solução de Roundup® Original seguindo as recomendações do fabricante. Soluções de PEG também foram utilizadas. Para bioensaios de germinação, as contagens foram realizadas a cada 12 horas, sendo determinadas as porcentagens e velocidades germinativas; para o crescimento, plântulas de sete dias submetidas aos compostos tiveram medidos seus comprimentos de radícula e parte aérea. A germinação, apesar de fortemente inibida pela cumarina, foi pouco sensível às demais soluções. Quanto ao crescimento, as radículas analisadas apresentaram necrose, ausência de pêlos e redução dose-dependente do comprimento para todos os tratamentos com exceção do controle. Os hipocótilos foram afetados pelo composto fenólico, glifosato e extratos aquosos de folhas não-lixiviadas. Apesar da ação alelopática, aspectos ecofisiológicos relativos ao pau-incenso ainda devem ser esclarecidos para que suas folhas possam ser usadas como herbicida.
Rodrigues, Katarina Mirna Marinho Tenório. "Testes antimicrobianos e toxicológicos de piper aduncum". Universidade Federal do Tocantins, 2017. http://hdl.handle.net/11612/527.
Plants for medicinal purposes are widely used in Brazil, but there are few studies that demonstrate the efficacy and the safety use. Piper aduncum is used for many communities as medicinal plant to treat and cure different diseases, including gastrointestinal disorders. The aim of this study was to evaluate the anti-microbial and toxic potential of aqueous crude extract from leaves of Piper aduncum, and approximate the effect in laboratory tests to what is possibly observed with the tea use. Healthy leaves of Piper aduncum were used to prepare the aqueous crude extract in three concentrations (20g/L, 10g/L and 5g/L). The antimicrobial activity was evaluated by the agar wells diffusion against entropathogenic bacteria Sthaphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Salmonella typhimurium ATCC 1402 e Shigella flexneri ATCC 12022. Human erythrocyte osmotic fragility and cytotoxic evaluation of Allium cepa roots growth were performed to evaluate the toxicity of the extracts. The phytochemical screening determined the present compound in infusions. The obtained results showed that P. aduncum infusions has no effect as antimicrobial, and it did not have any toxic effect against blood cells, but potential toxic effect on cell development.
Bourget, Guillemette. "Contribution à l'étude des propriétés cytotoxiques, antitumorales et hémolytiques d'un extrait aqueux d'une éponge : Pachymatisma Johnstonii". Nantes, 1989. http://www.theses.fr/1989NANT08VS.
Zhao, Tianming. "Caractérisations chimiques et biologiques d’extraits de plantes aromatiques et médicinales oubliées ou sous-utilisées de Midi-Pyrénées (France) et de Chongqing (Chine)". Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0039/document.
In both Midi-Pyrénées region (France) and Chongqing region (China), there are rich and underutilized medicinal and aromatic plants (MAP). Aiming at fully exploiting different molecules in these plants, the concept of MAP-refinery was developed and applied to several underutilized medicinal and aromatic plants in these two regions. Several water-based green extraction technologies of natural products (e.g. hydrodistillation, steam distillation and subcritical water extraction) were also investigated to look at their effects on essential oil composition and antioxidants recovery from selected plants. Firstly, lists of forgotten or underutilized medicinal and aromatic plants in both regions were established according to the rules of selection. From the lists, six plants in the Midi-Pyrénées region (Tussilago farfara L., Calendula arvensis L., Robinia pseudoacacia L., Geranium robertianum L., Cytisus scoparius L. and Spartium junceum L.) and three plants in the Chongqing region (Tussilago farfara L., Citrum aurantium L. and Saussurea costus) were finally selected for investigations. Then the MAP-refinery was applied to the selected plants in two regions in order to realise their global valorisation. Volatile extracts composition in the roots of Tussilago farfara L. and Calendula arvensis L., as well as flower buds of Spartium junceum L. were firstly investigated. The main chemical compounds in volatile extract from Tussilago farfara L. roots were sesquiterpene hydrocarbons and aliphatic compounds while main chemical compounds in volatile extract from Calendula arvensis L. roots were oxygenated sesquiterpenes, oxygenated monoterpenes and oxygenated diterpenes. The volatile extract from flower buds of Spartium junceum L. was mainly composed of aliphatic compounds. Antioxidant capacity evaluation results (by DPPH, ABTS, FRAC, ORAC and Folin-Ciocalteu tests) showed that several plant samples like Cytisus scoparius L., Tussilago farfara L., Citrum aurantium L. and Robinia pseudoacacia L. could be potential sources of natural antioxidants. Comparisons of hydrodistillation (HD), steam distillation (SD) and subcritical water extraction (SWE) showed that HD and SD had limited effects on essential oil composition but HD, SD and SWE had significant impacts on the recovery of antioxidants. Hydrodistillation seemed to be a better method for recovery of antioxidant compounds from residues of distillation than steam distillation. However, SWE appeared to be a more efficient method for direct extraction of antioxidant molecules (or phenolic compounds) from plants. In the hydrodistillation process, mineral contents in water were found to have very limited effects on yields of extracts but calcium and bicarbonate ions, had significant decreasing effects on antioxidant capacity and total phenolic content of both aqueous and methanolic extracts. Finally, an improved MAP-refinery was developed. Subcritical water was used for further extraction of antioxidant compounds from residues in original MAP-refinery. In this way, five parts could be obtained from plant materials: volatile extract, aqueous extract, methanolic extract, subcritical water extract and the final residue. The results showed that the improved MAP-refinery significantly increased the recovery of antioxidants compared with original MAP-refinery. This promising process will also allow a better valorisation of the final solid residue due to the lower content of residual water
Coelho, Maria Teresa Pita Pegado Gonçalves Rodrigues. "Estudos de propagação in vitro, caracterização e valorização de carqueja (Pterospartum tridentatum (L.) Willk)". Doctoral thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/9271.
The aim of this work was to develop methodologies for micropropagation and extraction of bioactive compounds from both wild gorse (Pterospartum tridentatum L.) and micropropagated gorse explants, as a means of valorisation of this species. Micropropagation was very effective on large scale propagation, having multiplication rates ranging from 1.6 to 43.9; number of shoots ranging from 1.5 to 10.4 and rooting above 96.7%. The extraction yield of aqueous extraction varied from 10.5 to 19.4 and 12.2 to 30.1% (w/w) for wild gorse and micropropagated gorse explants, respectively. Aqueous extracts showed high levels of total phenols, from 203.4 to 369.2 and 104.1 to 121.3 mg gallic acid eq g-1 ms, and FRAP antioxidant activity: 256-856 and 160-260 mmolFe2+ 100g-1 ms; DPPH: 1433-1551 and 1503-1509 mM Trolox 100g-1 ms for wild gorse and micropropagated gorse explants, respectively. Extracts showed no antifungal activity. However, these extracts showed inhibition of Bacillus subtilis, Pseudomonas aeruginosa and Staphylococcus aureus. Chitosan bioactive coatings with gorse extracts improved cherry postharvest preservation ability. The results allow topropose these methodologies to obtain extracts with bioactive properties from micropropagated material, without depleting natural resources
Libri sul tema "Extraits aqueux":
McLaughlin, J. R. Background to the measurement of the ph of aqueous extracts of wool. Christchurch: WRONZ, 1996.
Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.
Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.
Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.
Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.
Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.
Paula, Renato Tavares de. O conteúdo do direito de acesso à justiça na jurisprudência da corte europeia de direitos humanos. Editora Reflexão Acadêmica, 2022. http://dx.doi.org/10.51497/reflex.0000348.
Capitoli di libri sul tema "Extraits aqueux":
Khan, Babar, Mohammad Mobin e Ruby Aslam. "Aqueous and Organic Extracts". In Phytochemistry in Corrosion Science, 61–75. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003394631-4.
Quinn, Ronald J. "Chemistry of Aqueous Marine Extracts: Isolation Techniques". In Bioorganic Marine Chemistry, 1–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-48346-2_1.
Maneein, Supattra, John J. Milledge e Birthe V. Nielsen. "Enhancing Methane Production from Spring-Harvested Sargassum muticum". In Springer Proceedings in Energy, 117–23. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_15.
Subramanian, L., Koshy Obey e Thomas Sabu. "Phytosynthesis of Cu And Fe Nanoparticles using Aqueous Plant Extracts". In Polymeric and Nanostructured Materials, 141–52. Oakville, ON ; Waretown, NJ : Apple Academic Press, 2019. |: Apple Academic Press, 2018. http://dx.doi.org/10.1201/b22428-10.
Makaza, K., M. Matigimu e N. Sakadzo. "Aqueous Leaf Extracts of Sunflower (Helianthus annuus) for Weed Management". In Climate Change Adaptations in Dryland Agriculture in Semi-Arid Areas, 145–55. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7861-5_10.
Venkatachalam, V. V., e B. Rajinikanth. "Immunomodulatory Activity of Aqueous Leaf Extract of Ocimum sanctum". In Recent Advancements in System Modelling Applications, 425–32. India: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1035-1_37.
Sherkat, F., S. K. Razavi e B. Karatzas. "Protein Recovery and Trypsin Inhibitor Removal from Aqueous Extracts of Soy Flour". In Plant Proteins from European Crops, 279–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03720-1_47.
Deng, Wuyuan. "Antimicrobial Effects of Aqueous Extracts Obtained from Fallen Leaves of Ginkgo biloba". In Proceedings of the 2012 International Conference on Applied Biotechnology (ICAB 2012), 401–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37916-1_41.
Pinheiro, Joaquina, Elsa M. Gonçalves e Rui Ganhão. "Potential Use of Aqueous Extracts of Kombu Seaweed in Cream Cracker Formulation". In Food Engineering Series, 171–86. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61817-9_9.
Tănase, Luiza-Andreea, Oana-Viorela Nistor, Doina-Georgeta Andronoiu, Dănuț-Gabriel Mocanu, Sorin Ciortan, Elena Ioniță, Andreea Veronica Botezatu Dediu, Elisabeta Botez e Bogdan Ioan Ștefănescu. "Galactogogue Herbs: Antioxidant Activity and Bioactive Compounds’ Content Determined from Aqueous Extracts". In 10th Central European Congress on Food, 128–45. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04797-8_12.
Atti di convegni sul tema "Extraits aqueux":
Stojanova, Monika, Dragutin Djukic, Marina Todor Stojanova, Aziz Şatana e Blazo Lalevic. "DETERMINATION OF ANTIBACTERIAL POTENTIAL OF AGARICUS MACROSPORUS AND RUSSULA VESCA MUSHROOM EXTRACTS". In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.477s.
Protsenko, M. A., E. I. Filippova, E. V. Makarevich, I. A. Gorbunova, T. V. Teplyakova e N. A. Mazurkova. "ANTIVIRAL PROPERTIES OF EXTRACTS OF BASIDIOMYCETES OF THE NOVOSIBIRSK REGION". In X Международная конференция молодых ученых: биоинформатиков, биотехнологов, биофизиков, вирусологов и молекулярных биологов — 2023. Novosibirsk State University, 2023. http://dx.doi.org/10.25205/978-5-4437-1526-1-259.
Lupaescu, Ancuta-Veronica, Nicoleta Flutur, Brindusa-Alina Petre, Monica Iavorschi e Florin Ursachi. "ENHANCING THE ANTIOXIDANT ACTIVITY OF CHAMOMILE: EXPLORING THE IMPACT OF ULTRASOUND ON PROTEIN EXTRACTION". In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023v/6.2/s25.20.
"Determination of Antioxidant Property, Total Phenolics Content, and α-Glucosidase Inhibitory Activity of Different Solvent Extracts of Defatted and Non-Defatted Peanut Skins". In 4th International Conference on Biological & Health Sciences (CIC-BIOHS’2022). Cihan University, 2022. http://dx.doi.org/10.24086/biohs2022/paper.781.
Dyshlyuk L.S., L. S., e N. V. Fotina N.V. "Antimicrobial activity of water-alcohol extracts of Hedysarum neglectum". In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-7.
"Towards green extraction: A study on solvent selection and methods for antioxidant activities of Diplazium esculentum Retz. and Stenochlaena palustris". In Sustainable Processes and Clean Energy Transition. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902516-56.
Thuvaragan, S., H. M. P. M. Jeyasinghe e A. Murugananthan. "Comparative Evaluation of in - vitro Anthelmintic Activity of Sap, Fruit bulb, and Root of Borassus flabellifer". In 2nd International Conference on Public Health and Well-being. iConferences (Pvt) Ltd, 2022. http://dx.doi.org/10.32789/publichealth.2021.1011.
M.Hussein, Ali, Nadir Nanakali e Mohammed M.Hussein. "EFFECT OF HYPERICUM PERFORATUM ON GASTRIC ULCER IN RAT". In 4th International Conference on Biological & Health Sciences (CIC-BIOHS’2022). Cihan University, 2022. http://dx.doi.org/10.24086/biohs2022/paper.742.
Kuzovkova, A. A., M. S. Turko e T. P. Krymskaya. "MEASUREMENT METHOD OF AGIDOL-40, ACETOPHENONE, VULCACIT, SULPHENAMIDE C MASS CONCENTRATIONS IN WATER EXTRACTS FROM CONSUMER GOODS". In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-262-266.
Iancu, Ionica, Viorel Herman, Ileana Nichita, Alexandru Gligor e Anca Hulea. "RESEARCH ON THE ANTIMICROBIAL EFFECT OF ALLIUM SATIVUM EXTRACT ON SOME STRAINS OF SALMONELLA SPP ISOLATED FROM DOGS". In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/6.2/s29.90.
Rapporti di organizzazioni sul tema "Extraits aqueux":
Ridhowati, Sherly. Evaluation of the safe consumption of aqueous extract of flour from Stichopus variegates. Biomedpress, novembre 2019. http://dx.doi.org/10.15419/arr.2019.4.
Toshkova-Yotova, Tanya, Ani Georgieva, Plamen Pilarski e Reneta Toshkova. Aqueous Extracts of Green Microalga Coelastrella sp. BGV Display Antiproliferative and Proapoptotic Activity in Vitro against HeLa Tumour Cells. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, maggio 2021. http://dx.doi.org/10.7546/crabs.2021.05.07.
Alale, Theophilus, Nelson Opoku e Charles Adarkwah. The Efficacy of Aqueous False Yam (Icacina oliviformis) Tuber Extract Against Cowpea Aphids (Aphis craccivora Koch). Journal of Young Investigators, aprile 2017. http://dx.doi.org/10.22186/jyi.32.3.7-22-24.
Crouch, Rebecca, Jared Smith, Bobbi Stromer, Christian Hubley, Samuel Beal, Guilherme Lotufo, Afrachanna Butler et al. Preparative, extraction, and analytical methods for simultaneous determination of legacy and insensitive munition (IM) constituents in aqueous, soil or sediment, and tissue matrices. Engineer Research and Development Center (U.S.), agosto 2021. http://dx.doi.org/10.21079/11681/41480.
Poole, Loree Joanne, e C. Judson King. Novel Regenerated Solvent Extraction Processes for the Recovery of Carboxylic Acids or Ammonia from Aqueous Solutions Part I. Regeneration of Amine-Carboxylic Acid Extracts. Office of Scientific and Technical Information (OSTI), marzo 1990. http://dx.doi.org/10.2172/937438.
Crouch, Rebecca, Jared Smith, Bobbi Stromer, Christian Hubley, Samuel Beal, Guilherme Lotufo, Afrachanna Butler et al. Methods for simultaneous determination of legacy and insensitive munition (IM) constituents in aqueous, soil/sediment, and tissue matrices. Engineer Research and Development Center (U.S.), agosto 2021. http://dx.doi.org/10.21079/11681/41720.