Epimerization and Fragmentation of Glucose by Quaternary Ammonium Base Type Anion Exchange Resins¹

Determination of phytic acid in foods by high-performance liquid chromatography

“…Though strong anion exchange resins can interact with and catalyze reactions with certain sugars (Buhler et al, 1955;Turton and Pacsu, 1955), our results indicate that AG 1-X8 resin is inert to phytic acid. The unusual stability of phytic acid to hydrolysis is demonstrated by the fact that no loss occurs when the 0.5 N HC1 filtered extract is placed in a boiling water bath for 5 min.…”

Ion Clustering in Quaternary Ammonium Functionalized Benzylmethyl Containing Poly(arylene ether ketone)s

“…Quaternary ammonium functionalized polymers are well-known cationic polyelectrolytes that have found numerous successful applications in the chemical, medical, and biological fields. , Membrane-based processes for water-insoluble cationic polymers include fuel cells, , flow batteries, water electrolyzers, , electrodialysis, and reverse electrodialysis . In these membranes, positively charged quaternary ammonium groups are tethered to the polymeric backbones while the negatively charged counterions become mobile upon solvation.…”

The Conversion of C14O2 and CH3-C14O-COOH to Citric and Malic Acids in the Tomato Fruits

“…The mercuryacetone complex as converted to iodoform which gave acetone complex was converted to iodoform which gave the specific activity of C-2, 4 directly and C-3 by difference; a portion of the Deniges complex was also oxidized to carbon dioxide for the total activity of C-2, 3, 4. As a further verification of the degradation results, citric acid was also degraded by the method of Martin, Wilson and Burris (12) to give the total activity in C-1, 5,6. The pentabromoacetone from the three central carbon atoms was converted to carbon dioxide, which corresponds to the sum of C-2, 3, 4. All samples were counted as barium carbonate in the conventional manner to a standard error of 2 % and corrected for background and self-absorption.…”

“…A portion of the acid was decarbonated with concentrated sulfuric acid according to the method of Racusen and Aronoff (18) and the CO so formed was converted to CO2 for the specific activity of C-1. Finally, a sample was oxidized with potassium permanganate according to the procedure of Wood et al (29) to give carbon dioxide from C-1, 5 and acetaldehyde (corresponding to C-2, 3). The aldehyde was converted to iodoform which corresponds to the activity of C-3 and the activity of C-4 was obtained by difference.…”