Quantitative Fractionation of Low-Molecular-Weight Iodine-Containing Compounds in Thyroid Hydrolysates.

Preparation and some properties of low-molecular-weight selenotrisulfide compounds and selenium-containing, high-molecular-weight, heparin-related compounds

Low-molecular-weight selenotrisulfide (SeT) compounds were prepared by the reaction of thiol compounds [monothiols: thiosalicylic acid (TSA) and diethyldithiocarbamic acid (DDC); dithiols: dimercaptosuccinic acid, dithiothreitol and dithioerythritol] and selenious acid. For TSA, a SeT compound was isolated by preparative high-performance liquid chromatography (HPLC) and the reaction molar ratio...

Iodine-containing Compounds of Extrathyroidal Tissues.

Studies on Experimental Iodine Allergy: 3. Low Molecular Weight Elicitogenic Antigens of Allergy Iodine

We hypothesize that iodine allergy is an immune response to iodinated self proteins produced in vivo from various iodine-containing chemicals. Since an antigenic determinant ofexperimental iodine allergy is diiodotyrosine (DIT), we designed low molecular weight DIT derivatives having provocative antigenicity without sensitizing immunogenicity, Tetraiododityrosine and hexaiodotrityrosine provoke...

Impact of malolactic fermentation on low molecular weight phenolic compounds.

A reversed phase liquid chromatography-DAD method is proposed for analysis of major non-flavonoid phenolic compounds in wines. The method employed a mixture of acetic acid, water and methanol as eluents and was used to evaluate the impact of malolactic fermentation in low molecular phenolic compounds. The wines analyzed underwent different treatments, like the addition of a pectolytic enzyme or...

Nuclear Magnetic Resonance Analysis of Low-Molecular-Weight Compounds

This work was undertaken to obtain information on levels of metabolism in dormant spores of Bacillus species incubated for weeks at physiological temperatures. Spores of Bacillus megaterium and Bacillus subtilis strains were harvested shortly after release from sporangia and incubated under various conditions, and dormant spore metabolism was monitored by P nuclear magnetic resonance (NMR) anal...