English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The total antioxidant capacity from leaves of three Cuban endemic varieties of Erythroxylum alaternifolium was measured using three techniques: 2,2-diphenyl1-picrylhydrazyl (DPPH∙), 2,2’-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS∙+) and Oxygen radical absorbance capacity (ORAC). The highest values of antioxidant capacity and total phenols were measured in polar n-butyl alcohol extracts. Among the varieties of E. alaternifolium assayed, the var. parvifolium showed the strongest antioxidant capacity: ABTS (6.49 ± 0.05 mg TE/g dw); DPPH (11.16 ± 0.01 mg TE/g dw) and ORAC (35.1 ± 1.5 mg TE/g dw). Additionally, n-butyl alcohol extract of E. alaternifolium var. parvifolium also showed the highest content in phenolics with 284.2 ± 7.3 mg CAE/g dw and in flavonols with skeleton quercetin, kaempferol and myricetin with 471 µg/g dw. Moreover, two flavonol glycosides: ombuin-3- O-rutinoside and quercetin-3-O-rutinoside were isolated for the first time from n-butyl alcohol extract of E. alaternifolium var. alaternifolium.

journal of the chilean chemical society

IN VITRO CHARACTERIZATION OF ANTIOXIDANT PROPERTIES OF CUBAN ENDEMIC VARIETIES OF Erythroxylum alaternifolium A. Rich. ISOLATION OF TWO FLAVONOL GLYCOSIDES