نتایج جستجو برای: 6 hydroxy 2578 tetramethylchroman 2 carboxylic acid

تعداد نتایج: 3541103  

Journal: :Magnetic resonance in chemistry : MRC 2004
Stanislaw Witkowski Katarzyna Paradowska Iwona Wawer

13C cross-polarization magic angle spinning (CP/MAS) NMR data for 2,2,5,7,8-pentamethylchroman-6-ol (2), 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox c) (3) and its acetate (4), 2-methoxy-2,2,5,7,8-pentamethylchroman-6-ol (5), 2-hydroxy-2,2,5,7,8-pentamethylchroman-6-ol (6) and 2,2,5,7,8-pentamethylchroman (7) are reported. A deshielding of 7.7 ppm for the carboxylic carbon wa...

Journal: :Organic letters 2003
Sean M Culbertson Gary D Enright K U Ingold

[structure: see text] Pyridoxamine is known to be an effective inhibitor of both advanced glycation (AGE) and advanced lipoxidation (ALE) end products. The synthesis of a novel multifunctional AGE and ALE inhibitor, 6-dimethylaminopyridoxamine (dmaPM, 11) is described. The 6-dimethylamino substituent increases the radical trapping ability of pyridoxamine's phenolic group. Results obtained durin...

Journal: :Macedonian Journal of Chemistry and Chemical Engineering 2022

In this study, one novel N-pyrrolyl carboxylic acid (3), the corresponding hydrazide (5), and four new hydrazide-hydrazones (5a-d) bearing electron donating moieties were designed, synthesized, fully elucidated by 1H NMR, FT-IR, HRMS. The produced in five steps, which optimized applying microwave heating. microwave-assisted synthesis significantly decreased reaction times increased yields of ti...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2006
Elena Kovacheva Milen Georgiev Svetlana Pashova Maria Angelova Mladenka Ilieva

This study was conducted to evaluate the radical scavenging capacities of extracts and preparations from a Lavandula vera MM plant cell culture with different rosmarinic acid content and to compare them with pure rosmarinic and caffeic acids as well. The methods, which were used are superoxide anion and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt radicals scavenging a...

Journal: :Applied sciences 2023

This study investigated the physicochemical properties and sensory attributes of Yanggaeng, a traditional dessert in Far East Asia, treated with functional additive Corni fructus powder (CF) various concentrations (0% [control; CON], 2%, 4%, 6%). The proximate compositions, properties, antioxidant capacities, texture consumers’ preferences CF-treated Yanggaeng were assessed. had decreased L* (l...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2003
Ammar Saleem Henri Kivelä Kalevi Pihlaja

A modified in vitro lipid peroxidation inhibition assay was used to guide the fractionation and the isolation of antioxidative principles of Fnnish pine bark extract. This approach yielded 3,4-dihydroxybenzoic acid (protocatechuic acid) and taxifolin-3-O-beta-glucopyranoside as major antioxidative compounds from the plant material. The structural elucidation of these compounds was undertaken wi...

Journal: :Journal of Materials Science 2022

Abstract Growth of bionanotechnology requires functional materials, which can lower the costs and be modified to specific reaction. Conjugations nanoparticles enzymes form efficient products multi-material enzyme-nanocomplexes, controlled from synthesis application provide predicted results. Multimetallic nanooxides ZnO–CuO, ZnO–MnO, ZnO–MnO–CuO were obtained by precipitation method with sonica...

Journal: :British Food Journal 2021

Purpose The purpose of this paper is to determine the polyphenol content, antioxidative potential and antiproliferative activity Swiss chard from Montenegro, grown under different irrigation fertilization regimes. Design/methodology/approach was in open field (Lješkopolje, Montenegro) where it subjected Chard samples were analyzed for previously identified polyphenols antioxidant parameters. Ad...

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