catechin

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  • noun

Words related to catechin

a tannic acid that is extracted from black catechu as a white crystalline substance

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Results were expressed as Catechin Equivalent (CE) mg/g dry weight by comparison with the catechine standard curve.
Indeed, we found that AFA-PC and AFA-MAAs have [IC.sub.50] and [K.sub.i] values much lower than those of other natural substances such as catechine and piperine, and were very close to that of the synthetic selective MAO-B inhibitor deprenyl (selegiline) (Table 2).
Total flavonoids in leaves were measured with aluminium trichloride (Al[Cl.sub.3]) with catechine as standard, according to[21] with a slight modification.
HPLC analysis of in vitro degradation products of tannins of TMR II, IV and VI after different incubation periods TMRs II (4% Tannin) Parameters 18 h 30 h 42 h Tannin degraded products (mg/g tannin) Phloroglucinol 50.54 75.99 -- Gallic acid -- 0.05 -- Resorcinol -- -- -- Catechine 16.40 11.58 -- TMRs IV (8% Tannin) Parameters 18 h 30 h 42 h Tannin degraded products (mg/g tannin) Phloroglucinol 86.25 297.79 18.75 Gallic acid -- 0.05 0.07 Resorcinol -- -- 7.10 Catechine 5.62 10.00 11.45 TMRs VI (12% Tannin) Parameters 18 h 30 h 42 h Tannin degraded products (mg/g tannin) Phloroglucinol 63.34 298.40 213.07 Gallic acid 0.01 0.02 0.05 Resorcinol -- -- 1.09 Catechine 1.55 3.39 7.06 --Not detected.
Procyanidin B-1, procyanidin B-2, epicatechin and catechine were kindly provided by Tsumura & Co.
Among the tested flavonoids, catechine and rutin were detected in both extracts but the methanol extract contains the highest amount of these flavonoids.
Etude des catechines et des procyanidols de la grappe de raisin, du vin et d'autres derives de la vigne.