نتایج جستجو برای: dehydroascorbate

تعداد نتایج: 373  

Journal: :Magnetic resonance in medicine 2006
Melissa Terpstra Malgorzata Marjanska Pierre-Gilles Henry Ivan Tkác Rolf Gruetter

Vitamin C (ascorbate) and glutathione (GSH) are the two most concentrated non-enzymatic antioxidants in the human brain. Double editing with (DEW) MEGA-PRESS at 4T was designed in this study to measure both antioxidants in the same amount of time previously required to measure one. In the occipital lobe of four human subjects, resolved ascorbate (Asc) and GSH resonances were detected repeatedly...

Journal: :Agriculture 2023

The purpose of the current study was to determine possible improvement in soybean plants’ tolerance against vanadium-induced stress response application olive solid waste (OSW) and selenium nanoparticles (Se-NPs), by assessing metabolites plant defense systems. Drawing upon this aim, a pot experiment performed where plants were grown with fertilization treatment (including, control, OSW, Se-NPs...

Journal: :Clinical chemistry 2004
Jean-Claude Lavoie Philippe Chessex Thérèse Rouleau Diane Migneault Blandine Comte

BACKGROUND When solutions of multivitamin preparations (MVPs) are exposed to light, H(2)O(2) as well as organic peroxides are generated and the concentration of vitamin C decreases. The aim of this study was to determine, using mass spectrometry, whether the generation of oxidative byproducts of vitamin C, such as dehydroascorbate (DHA) and 2,3-diketogulonic acid (DKG), accounted for the report...

Journal: :Agronomy 2023

This study explored the role of exogenous ?-Toc (0.5 mM) and Asc (1 in alleviating damaging effects salt stress rapeseed plants (Brassica campestris cv. BARI Sarisha-17). Exposure 21-day-old to different levels (75 mM 150 NaCl) resulted higher accumulation sodium ions (Na+), reduced potassium ion (K+) levels, lower K+/Na+ ratio, increased oxidative damage, chlorophyll (Chl) breakdown, disrupted...

Journal: :Photochemical and Photobiological Sciences 2021

The present work aimed to compare antioxidant response and lipid peroxide detoxification capacity of an arctic-alpine species Arabis alpina its close relative model Arabidopsis thaliana under acute short duration (3 h 6 h) UV-B stress (4.6 8.2 W/m2). After 3 exposure UV-B, A. showed lower peroxidation H2O2 accumulation when compared thaliana. Moreover, Fv/Fm value dropped 0.70, while 0.75 indic...

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