Catechins
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Chá Branco (Camelia simensis) diminui estresse oxidativo e triglicerídios em camundongos com obesidade induzida por dieta hiperlipídica
Several studies suggest that green tea has beneficial effects on obesity and its related complications, mainly due to its antioxidant effects. White tea derivated of same plant (Camellia sinensis), has higher levels of catechins than green tea and has been popularly used for weight loss. However, there are no scientific studies supporting this effect. Our go
Publicado em: 2010
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14. Determinação dos mecanismos de ação envolvidos nas atividade antiulcerogenica e antioxidantes de Rhizophora mangle L / Determination of the mechanisms of action in the antiulcerogenic and antioxidant activities of Rhizophora mangle L
The pharmacological research has been focusing on the folk medicine knowledge in order to establish the scientific basis of their pharmacological effects. Nowadays, tannins play a prominent role because of its high antioxidant capacity and, due to the progress made in the analysis and identification of these compounds and their therapeutic possibilities. Amo
Publicado em: 2009
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15. Atividade Anti-helmíntica de Cocos nucifera L. Sobre Nematóides Gastrintestinais de Ovinos / Anthelmintic activity of Cocos nucifera L. on Gastrointestinal Nematodes of Sheep
The gastrointestinal nematodes control of small ruminants has been realized by synthetic anthelmintics. However, the development of resistance required research of control alternatives. Among these alternatives is the use of medicinal plants rich in condensed tannins. The objective of this work was to evaluate the efficacy of Cocos nucifera fruit against gas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2008
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16. Efeito protetor do chá verde (Camellia sinensis) contra a ação genotóxica da doxorrubicina, em células somáticas de Drosophila melanogaster
The green tea is considered a functional food with antioxidant activity, and this delays the process of old age and helps in the prevention of chronicle and degenerative diseases, such as cancer and heart affections. Of catechins, present in green tea, may is extremely important in the inactivation of free radicals, which provoke damages to the DNA molecules
Publicado em: 2008
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17. Polyphenol in grape juices : stability during processing and storage / Polifenois em suco de uva : investigaçao sobre a estabilidade durante o processo e armazenamento
Epidemiological studies have demonstrated that polyphenol-rich foods and beverages exert beneficial physiological effects. Grape juices are relevant sources of flavonoids, particularly flavan-3-ols, mostly in the monomeric forms of catechins [(+)-catechin and (-)-epicatechin]. The objectives of this work were to characterize and quantify phenols (TP), catech
Publicado em: 2007
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18. Estudo químico e avaliação da atividade antioxidante de chá-verde brasileiro (camellia sinensis var. assamica) cultivar iac-259 / Components study and antioxidant activity evaluation of Brazilian green tea (Camellia sinensis var. assamica IAC-259 cultivar)
O chá-verde brasileiro, obtido a partir das partes aéreas de Camellia sinensis var. assamica, teve sua produção recentemente implantada no Brasil devido ao emergente consumo. As principais atividades farmacológicas atribuídas a esta planta estão relacionadas à atividade antioxidante, quimiopreventiva e antitumoral. Neste trabalho foi desenvo lvido e
Publicado em: 2007
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19. Efeito inibitÃrio do extrato aquoso do guaranÃ, do chà verde e da epigalocatecina-3 galato sobre a atividade da enzima que degrada a insulina em prÃstata de rato
Insulin degrading enzyme (IDE) is an intracellular protein that degrades insulin and others peptides and hormones. Insulin degradation is important both in the control of cellular responses to the hormone and in the interaction of the hormone with their target tissues. Multiple cellular functions are related to the IDE in addition to degradation, including b
Publicado em: 2006
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20. Antioxidant and antiviral properties of Pseudopiptadenia contorta (Leguminosae) and of quebracho (Schinopsis sp.) extracts
Proanthocyanidins from P. contorta leaves and from a commercial quebracho extract were isolated and characterized. Flavonoids, catechins and gallic acid were also identified in the extracts of P. contorta. Compounds were evaluated for their antioxidant properties and for their antiviral activity against an acyclovir-resistant herpes simplex virus type 1 stra
Química Nova. Publicado em: 2005-06
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21. In Vitro and In Vivo Activities of Tea Catechins against Helicobacter pylori
The catechin epigallocatechin gallate showed the strongest activity of the six tea catechins tested against Helicobacter pylori (MIC for 50% of the strains tested, 8 μg/ml). It had bactericidal activity at pH 7 but not at pH ≤5.0. In infected Mongolian gerbils, H. pylori was eradicated in 10 to 36% of the catechin-treated animals, with significant decreas
American Society for Microbiology.
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22. Oligomeric catechins: An enabling synthetic strategy by orthogonal activation and C(8) protection
Controlled formation of oligomeric catechins has become possible by an orthogonal synthetic strategy. Bromo-capping of the C(8) position of the flavan skeleton enabled the equimolar coupling of electrophilic and nucleophilic catechin derivatives, enabling an efficient synthetic strategy to complex catechin oligomers.
National Academy of Sciences.
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23. Anti-Trypanosoma cruzi Activity of Green Tea (Camellia sinensis) Catechins
The trypanocidal action of green tea catechins against two different developmental stages of Trypanosoma cruzi is reported for the first time. This activity was assayed with the nonproliferative bloodstream trypomastigote and with the intracellular replicative amastigote parasite forms. An ethyl acetate fraction from Camellia sinensis green tea leaves, which
American Society for Microbiology.
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24. Inhibition of Penicillinase by Epigallocatechin Gallate Resulting in Restoration of Antibacterial Activity of Penicillin against Penicillinase-Producing Staphylococcus aureus
The combination of epigallocatechin gallate (EGCg, a main constituent of tea catechins) with penicillin showed synergism against 21 clinical isolates of penicillinase-producing Staphylococcus aureus. Besides binding directly to peptidoglycan, the inhibition of penicillinase activity by EGCg is responsible for the synergism. EGCg inhibited the penicillinase a
American Society for Microbiology.