vitamin K

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vitamin K

[′vīd·ə·mən ¦kā]
(biochemistry)
Any of three yellowish oils which are fat-soluble, nonsteroid, and nonsaponifiable; it is essential for formation of prothrombin. Also known as antihemorrhagic vitamin; prothrombin factor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Pinto et al., "In vitro activity of Brazilian medicinal plants, naturally occurring naphthoquinones and their analogues, against methicillin-resistant Staphylococcus aureus," International Journal of Antimicrobial Agents, vol.
falciparum W2 and the cytotoxicity to Hep G2A16 cell cultures of naphthoquinones with different scaffolds, including ortho- and para-derivatives represented by ortho-FNQs (7) para-FNQs (8) supporting alkyl and aryl groups at the furan ring that were synthesized from HNQs (6) obtained from lawsone (5), as shown in the retrosynthetic scheme (Figure 2).
Unusual naphthoquinones, catechin and triterpene from Byrsonima microphylla.
It contains many bioactive compounds, such as sugars, vitamins, flavonoids, tannins, terpenoids, steroids, naphthoquinones, dietary fiber, carotenoids, minerals, amino acids, and lipids (Gross, 1987; Mallavadhani et al., 1998).
Bioactive naphthoquinones isolated from Tabebuia barbata by Colman-de Saizarbitoria et al (1977) were found to be active against A-549 human lung adenocarcinoma, MCF-7 breast carcinoma and HT-29 human colon carcinoma.
The taxonomic significance of naphthoquinones in the Droseraceae.