für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

Recent work (1) on the blood precursors of milk fat, by attaching special significance to the triglycerides of blood in the formation of milk, has illustrated forcefully the need of a more direct method for the quantitative evaluation of neutral fat in blood. Until Kelsey (2) reported the use of lipases, the isolation of the glyceride fatty acids had not been accomplished because of the homolog...

The behavior of hydroxypyruvic acid, CHzOH. CO. COOH, and some of its transformation products toward periodic acid, treated in detail in the preceding paper (I), suggested an orienting study of the action of this oxidant on glyoxylic acid, CHO. COOH, and other a-keto acids or on compounds giving rise to such keto acids, following oxidation by periodate. While cr-glycols, a-ketols, a-diketones, ...

Foetal human lung fibroblasts, grown in monolayer, were allowed to incorporate 35SO42for various periods of time. 35S-labelled macromolecular anionic products were isolated from the medium, a trypsin digest of the cells in monolayer and the cell residue. The various radioactive polysaccharides were identified as heparan sulphate and a galactosaminoglycan population (chondroitin sulphate and der...

Lipopolysaccharide isolated from colicin E2-sensitive Escherichia coli and from "receptor-minus" mutants inhibits the activity of colicin E2. Lipid A and the polysaccharide fraction obtained by mild acid hydrolysis of lipopolysaccharide are inactive either alone or when tested in combination. Periodate oxidation of lipopolysaccharide destroys over 85% of its inhibition activity.

Dialdehyde cellulose was synthesized via the heterogeneous periodate oxidation of microcrystalline in an aqueous solution. The aldehyde content dialdehyde determined nitrate analysis based on a two-step sequential approach. approach first employed hydroxylamine to react with groups and produce oxime Schiff’s replacement reaction. Then, were oxidized persulfate nitrate. concentration analyzed tw...

A spectrophotometric method is proposed to determine isoniazid using oxidative coupling reaction. The depends on adding the oxidizing agent potassium periodate reagent solution 2,4-dinitrophenylhydrazine. Different optimum conditions are studied and explained based various experiments tests. wavelength (406) nm. Beer's law within concentration (0.2-40) µg/ml, with a molar absorptivity value of ...

A method was developed to analyze the distribution of sulfur compounds in model sulfur compounds by potentiometric titration, and applied to analyze hydrotreated transformer base oil. Model thioethers were oxidized to corresponding sulfoxides by tetrabutylammonium periodate and sodium metaperiodate, respectively, and the sulfoxides were titrated by perchloric acid titrant in acetic anhydride. T...