Crystalline torulin (as vitamin B1) and the international vitamin B1 standard

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...

Vitamin-B1 Deficiency

Intestinal Flora and Vitamin B1

Vitamin B1 Deficient Animals and Poliomyelitis *

In previous experiments,2 an unsuccessful attempt was made to acclimate monkey cord virus to white rats, which had been made completely vitamin B1 deficient by feeding them a vitamin B1 free diet for 30 days prior to the start of the experiment. It was thought that our failure might have been due to the fact that we did not have the animals in a proper state or stage of deficiency; perhaps the ...

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...