Water clustersDFTDissociation of ascorbic acid in water has been studied by using a cluster model. It was examined by density functional theory (DFT) with the В3LYP, M06, and wB97XD functionals and a 6–311++G(d,p) basis set. The thermodynamic and kinetic characteristics of proton ...
The highest FRAP values of SDS-AA2G and SDS-EAC systems (0.17 and 2.71 mmol Fe2+/g, respectively) were at SDS concentration of 0.40 mM and were much higher than the ones of pure ascorbic acid derivatives. Based on the surface tension isotherms and Szyszkowski's equation, it was found ...
Ascorbic acid (AA) enhances the activity of TET2 likely by reducing catalytic site Fe(III) to Fe(II)21,22. Simultaneous 2-oxoglutarate decarboxylation provides two additional electrons needed for dioxygenase activity. AA may thus improve the function of intact TET2 in cases with heterozygousTET2MT,...
The structure of ascorbic acid consists of a five-membered lactone ring and four hydroxyl groups, among which one of the hydroxyl groups is prone to dissociation due to the conjugation effect [17]. This makes the ascorbic acid molecule bulky and acidic, with a pKa = 4.25 [18]. As a...
This is demonstrated in Table 5, which shows that as the temperature of the ascorbic acid medium rises, the kexp increases, reducing the induction time and causing a greater flow of hydronium ions. [H3O+] implies the dissociation of the solution, which generates collisions that lead to a ...
Finally, the trace ascorbic acid was tested to prove that the Cu NCs have a certain application value, which can inspire the assembly and application of nanoclusters in the future. Figure 1. The scheme of short-peptide-modified Cu NCs as a fluorescent probe for the specific detection of ...
Keywords: spectrofluorimetry; ascorbic acid; 2,4,6-tripyridyl-S-triazine 1. Introduction Ascorbic acid (2-oxo-L-threo-hexono-1,4-lactone-2,3-endiol, AA) also known as Vitamin C is water-soluble vitamin which is very important because it participates in a great variety of biological ...
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This interpolation function is then used in a ‘FindFit’ routine of Mathematica to extract P from the experimental pH profiles. 3. Results An AscH transmembrane concentration gradient gives rise to an acid flux. In turn, AscH dissociation in the receiving USL gives rise to a pH shift (Figure...