英语词汇“vitamin b₁₂”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

vitamin B₁₂ n. cobalamin or any of several derivatives of it, cobalt, containing compounds synthesized by micro-organisms and present in food of animal origin (esp. meat, eggs, and dairy products), a deficiency leading to pernicious anæmia and neuropathy; cf. extrinsic factor at extrinsic adj. 3c.

ΚΠ

1948 M. S. Shorb in Science 16 Apr. 397/1 A crystalline compound, vitamin B₁₂, has been isolated from liver..and has been shown to be highly active hematopoietically..upon cases of pernicious anemia.

1950 E. A. Kaczka et al. in Science 29 Sept. 355 The name cobalamin designates all the vitamin B₁₂ molecule except the cyano group, and..vitamin B₁₂ becomes cyano-cobalamin, and vitamin B_12a, hydroxo-cobalamin.

1961 New Scientist 23 Feb. 457/2 The cobalt..had a selective action. Experiments showed that it was taken up by the flora of the rumen of sheep and cattle in the synthesis of vitamin B₁₂.

1982 S. G. Chaney in T. M. Devlin Textbk. Biochem. xxvi. 1225 The liver stores up to a 6-year supply of vitamin B₁₂. Thus, deficiencies..are extremely rare.

单词	vitamin b₁₂
释义	> as lemmas vitamin B₁₂ vitamin B₁₂ n. cobalamin or any of several derivatives of it, cobalt, containing compounds synthesized by micro-organisms and present in food of animal origin (esp. meat, eggs, and dairy products), a deficiency leading to pernicious anæmia and neuropathy; cf. extrinsic factor at extrinsic adj. 3c. ΚΠ 1948 M. S. Shorb in Science 16 Apr. 397/1 A crystalline compound, vitamin B₁₂, has been isolated from liver..and has been shown to be highly active hematopoietically..upon cases of pernicious anemia. 1950 E. A. Kaczka et al. in Science 29 Sept. 355 The name cobalamin designates all the vitamin B₁₂ molecule except the cyano group, and..vitamin B₁₂ becomes cyano-cobalamin, and vitamin B_12a, hydroxo-cobalamin. 1961 New Scientist 23 Feb. 457/2 The cobalt..had a selective action. Experiments showed that it was taken up by the flora of the rumen of sheep and cattle in the synthesis of vitamin B₁₂. 1982 S. G. Chaney in T. M. Devlin Textbk. Biochem. xxvi. 1225 The liver stores up to a 6-year supply of vitamin B₁₂. Thus, deficiencies..are extremely rare. extracted from vitaminn. < as lemmas
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> as lemmas