Phthiocol, the pigment isolated from Mycobacterium tuberculosis var. hominis, strain H37, by Anderson and Newman (1933a), has a structural formula identical with that of vitamin K, except for the substitution of a hydroxyl group for the phytyl radical on its third carbon. The synthesis of this antihemorrhagic vitamin by Mycobacterium tuberculosis var. hominis was noted in animal experiments by ...

A bstract We consider the Witten-Reshetikhin-Turaev invariants or Chern-Simons partition functions at around roots of unity $$ q={e}^{\frac{2\pi i}{K}} q = e 2 πi K <...

cyprinus carpio is a stenohaline species but can tolerate some ranges of changes in environmental salinities, so histomorphological methods and na+-k+ atpase and aquaporin 3 immunohistochemistry were performed on common carp kidney as an osmoregulatory organ in experimental groups and control in order to investigate their possible roles during salinity challenge. five groups of fish (n=25) with...

Vitamin K group is known as an anti-haemorrhagic vitamin and has a common skeleton of 2-methyl-1,4-naphthoquinone. There are several homologs which differ in the alkyl side chain at 3-position of naphthoquinone ring. Of these homologs, vitamin K2(20) (K2) which has a geranyl-linalyl side chain is considered to be a physiologically active type of this vitamin, since Martius, et al.2) reported th...

Vitamin K(1), 2-methyl-3-phytyl-1,4-naphthoquinone, is a substance found in all plant chloroplasts. It is, therefore, interesting to know whether it has any influence upon the metabolism of plants. Experiments made with the phytol-free derivatives like 2-methyl-1,4-naphthoquinone or the corresponding 3-oxy compound, phthiocol, gave the following results. These substances accelerate the respirat...

The experiment was conducted to investigate the effects of dietary vitamin K on survival, growth and tissue vitamin K concentrations of abalone, Haliotis discus hannai. Eight purified diets were formulated to provide a series of graded levels of menadione sodium bisulfite (MSB) (0-320 mgkg(-1) diet). The brown alga, Laminaria japonica, was used as a control diet. Abalone juveniles of similar si...