The biological determination of crystalline vitamin B1

Kinetic Fluorescence Determination of Vitamin B1

This technical note describes kinetic fluorescence as an analytical technique to quantify non-fluorescent species. The technique is applied to the determination of thiamine (vitamin B1) in solution. Fluorescence intensity is monitored as thiamine converts to fluorescent thiochrome, and a relationship is established between the rate of increase of intensity and the concentration of thiamine. The...

Vitamin B1

Vitamin B1 is a watersoluble vitamin. It consists out of a pyrimidineand a thiazol ring, which are synthesized independently and linked afterwards.Vitamin B1 is de novo produced by many plants and microorganisms. Humans and animals have to take it up by nutrition. They are only able to do the phosphorylation reaction of the thiamin molecule. Thiamin is found free and as mono-, diand triphosphat...

determination of maximal singularity free zones in the workspace of parallel manipulator

due to the limiting workspace of parallel manipulator and regarding to finding the trajectory planning of singularity free at workspace is difficult, so finding a best solution that can develop a technique to determine the singularity-free zones in the workspace of parallel manipulators is highly important. in this thesis a simple and new technique are presented to determine the maximal singula...

Vitamin-B1 Deficiency

Biological Estimation of the Thiazole and Pyrimidine Moieties of Vitamin B1

Fungus growth methods for estimating either vitamin B1 thiazole or vitamin B1 pyrimidinel have been used by Robbins and Kavanagh (l), Kavanagh (2), and Krampitz and Woolley (3), and a fermentation stimulation method has been described by Schultz, Atkin, and Frey (4). A procedure utilizing the synthesis of vitamin B1 by yeast from thiazole and pyrimidine has been used in this laboratory to estim...