| 单词 | vitamin k₁ |
| 释义 | > as lemmasvitamin K₁ vitamin K n. either or both of two related fat-soluble derivatives of naphthoquinone, vitamin K₁ (= phylloquinone n.) and vitamin K₂ (menaquinone, C41H56O2), one or other of which is required for proper clotting of the blood, the former occurring in green vegetables and the latter being synthesized by intestinal bacteria. ΚΠ 1935 H. Dam in Nature 27 Apr. 653/1 I therefore suggest the term vitamin K for the antihæmorrhagic factor. 1939 Jrnl. Amer. Chem. Soc. 61 1295/1 (heading) The isolation of vitamins K1 and K2. 1939 Chem. Abstr. 33 8191 The light yellow vitamin K1 from alfalfa, named by Dam..‘α-phylloquinone’, (I) crystallizes at low temp. 1947 Radiology 49 304/1 Vitamin K and transfusions of whole blood were ineffective in reducing clotting time. 1975 J. Marks Guide to Vitamins 71 Domestic animals suffering from warfarin poisoning should be treated with vitamin K1. 1983 J. Katz in Kaye & Rose Fund. Internal Med. cxxxvi. 905/2 A deficiency of vitamin K cannot occur solely from an inadequate diet. Intestinal bacteria synthesize the vitamin. < as lemmas |
| 随便看 |
|
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。