антиоксиданти

This study evaluates the antioxidant properties of leaves, unripe and ripe fruits of Ziziphus mauritiana from the UAE. Phenolic compounds show a strong correlation with antioxidant activity, with the leaves exhibiting the highest efficiency. The results suggest that Ziziphus mauritiana leaves are a promising source of natural antioxidants with potential therapeutic applications.

The study focuses on obtaining bamboo-based composite materials and new environmentally friendly binders with different degrees of silylation (15-35%) at different pressures and temperatures. The synthesis was carried out using silylated polystyrene (poly[trimethoxy(4-vinylphenethyl)] silane) and styrene as a binder and reinforcing agent in the presence of organic/inorganic additives, antioxidants and antipirene.

The synthesis method of 1,4-naphthoquinone with hindered phenol substituent have been proposed. Aminoderivatives of 2-chloro-3-(3,5-di-tert-butyl-4-hydroxy-phenyl)-1,4- naphthoquinone were obtained. Structure of compounds was confirmed using spectral data. Запропоновано метод одержання 1,4-нафтохіну з просторово екранованим фенольним замісником. Одержано амінопохідні 2-(3,5-ди-трет-бутил-4-гідроксифеніл)-3-хлоро-1,4- нафтохінону. Підтверджено їх будову та наведено спектральні характеристики.