L-Tyr-EMPO,a new EMPO analogue bearing an L-tyrosine methyl ether group,was first synthesized by *** radicals,including O-·2,·OH,·OR,and ·R,have been efficiently detected and characterized via *** ...
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L-Tyr-EMPO,a new EMPO analogue bearing an L-tyrosine methyl ether group,was first synthesized by *** radicals,including O-·2,·OH,·OR,and ·R,have been efficiently detected and characterized via *** half-life of the L-Tyr-EMPO superoxide adduct was estimated to be ca.6.5 *** importantly,the present study demonstrated a new synthetic strategy for covalent conjugation between cyclic-nitrone and amino group in peptides or proteins,by which the site-specifically spin trapping can be performed via antibody linked nitrone in the near ***,with the help of the covalent link,the targeting for the areas of interest in which the monitored radical species was sitespecially generated.
A glyceride containing three ferulic groups was first synthesized in order to investigate intermolecular synergistic antioxidant activity. The antioxidant activity was evaluated via a radical-scavenging reaction of D...
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A glyceride containing three ferulic groups was first synthesized in order to investigate intermolecular synergistic antioxidant activity. The antioxidant activity was evaluated via a radical-scavenging reaction of DPPH˙ radical. Although the scavenging capacities of both antioxidants, ferulic acid and glyceride tri-ferulate, were roughly equal, the apparent activation energy(Ea) of 19.50 kJ/mol for glyceride tri-ferulate is obviously lower than that of 28.80 kJ/mol for ferulic acid. The synergistic effect on Ea was further explained by a parallel π-π-stacking interaction.
Six linear nitrones,three DBN derivatives and their phosphoryl analogues,were first synthesized in this article,and the structures of their O-·2-spin trapping products,the nitroxides,were theoretically and experi...
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Six linear nitrones,three DBN derivatives and their phosphoryl analogues,were first synthesized in this article,and the structures of their O-·2-spin trapping products,the nitroxides,were theoretically and experimentally *** theoretical calculations on the optimized geometries of the spin adducts,using DFT method at B3LYP/6-311+G(d,p)//B3LYP/6-31G(d) level,demonstrated that both the intromolecular H-bonds and their internal rotations around C—N bond are the key factors for stabilizing the spin adducts.
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