英语词汇“vitamin d₃”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

vitamin D n. each or all of the fat-soluble vitamins that cure or prevent rickets in children and osteomalacia in adults, one or other being required for the correct metabolism of calcium; spec. vitamin D₂ [named in German by A. Windaus et al. 1931, in Ann. d. Chem. CDLXXXIX. 269] , a compound, C₂₈H₄₄O, made by the ultraviolet irradiation of ergosterol and added to dairy products; also called calciferol or ergocalciferol; vitamin D₃ [named in German by A. Windaus et al. 1936, in Zeitschr. f. Physiol. Chem. CCXLI. 102] a closely related compound, C₂₇H₄₄O, formed in the skin by ultraviolet light and present in egg-yolk, liver, and fish-liver oils; also called cholecalciferol.

ΚΠ

1921 Funk & Dubin in Proc. Soc. Exper. Biol. & Med. 1921–2 19 15 It is possible in most cases to effect an almost quantitative separation of the B-vitamine..from another substance, which we provisionally have called vitamine D.

1928 A. B. Callow Food & Health 51 Ergosterol..was present in minute quantities in what was formerly thought to be pure cholesterol... When ergosterol is irradiated it acquires the property of preventing or curing rickets, that is to say, it becomes vitamin D.

1932 Chem. Abstr. 26 1015 The isolation of cryst. vitamin D₁.

1932 Chem. Abstr. 26 1015 An added note states that vitamin D₂ has been isolated.

1936 Chem. Abstr. 30 6423 The name vitamin D₃ is proposed for this substance.

1953 J. S. Fruton & S. Simmonds Gen. Biochem. xxxviii. 903 The term vitamin D₁ has been discarded since the material to which it was first applied has been found to be a mixture of calciferol and several sterols.

1976 H. Campion et al. in B. E. C. Nordin Calcium, Phosphate & Magnesium Metabolism xii. 445 The compounds known as vitamin D have in common a unique arrangement of three carbon-carbon double bonds, two of which connect a hydroxylated cyclohexane ring to a substituted hydrindane system.

1983 D. J. Weatherall et al. Oxf. Textbk. Med. I. x. 44/2 In most respects these vitamin Ds are comparable in their metabolism and their actions.

单词	vitamin d₃
释义	> as lemmas vitamin D₃ vitamin D n. each or all of the fat-soluble vitamins that cure or prevent rickets in children and osteomalacia in adults, one or other being required for the correct metabolism of calcium; spec. vitamin D₂ [named in German by A. Windaus et al. 1931, in Ann. d. Chem. CDLXXXIX. 269] , a compound, C₂₈H₄₄O, made by the ultraviolet irradiation of ergosterol and added to dairy products; also called calciferol or ergocalciferol; vitamin D₃ [named in German by A. Windaus et al. 1936, in Zeitschr. f. Physiol. Chem. CCXLI. 102] a closely related compound, C₂₇H₄₄O, formed in the skin by ultraviolet light and present in egg-yolk, liver, and fish-liver oils; also called cholecalciferol. ΚΠ 1921 Funk & Dubin in Proc. Soc. Exper. Biol. & Med. 1921–2 19 15 It is possible in most cases to effect an almost quantitative separation of the B-vitamine..from another substance, which we provisionally have called vitamine D. 1928 A. B. Callow Food & Health 51 Ergosterol..was present in minute quantities in what was formerly thought to be pure cholesterol... When ergosterol is irradiated it acquires the property of preventing or curing rickets, that is to say, it becomes vitamin D. 1932 Chem. Abstr. 26 1015 The isolation of cryst. vitamin D₁. 1932 Chem. Abstr. 26 1015 An added note states that vitamin D₂ has been isolated. 1936 Chem. Abstr. 30 6423 The name vitamin D₃ is proposed for this substance. 1953 J. S. Fruton & S. Simmonds Gen. Biochem. xxxviii. 903 The term vitamin D₁ has been discarded since the material to which it was first applied has been found to be a mixture of calciferol and several sterols. 1976 H. Campion et al. in B. E. C. Nordin Calcium, Phosphate & Magnesium Metabolism xii. 445 The compounds known as vitamin D have in common a unique arrangement of three carbon-carbon double bonds, two of which connect a hydroxylated cyclohexane ring to a substituted hydrindane system. 1983 D. J. Weatherall et al. Oxf. Textbk. Med. I. x. 44/2 In most respects these vitamin Ds are comparable in their metabolism and their actions. extracted from vitaminn. < as lemmas
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> as lemmas