请输入您要查询的英文单词:

 

单词 putrescine
释义

putrescinen.

Brit. /ˈpjuːtrəsiːn/, U.S. /ˈpjutrəˌsin/
Forms: 1800s– putrescin, 1800s– putrescine.
Origin: A borrowing from Latin, combined with an English element; modelled on a German lexical item. Etymons: Latin putrēscere , -ine suffix5.
Etymology: < classical Latin putrēscere to putrefy, decay (see putrescent adj.) + -ine suffix5, after German Putrescin ( L. Brieger Ueber Ptomaine (1885) II. 43). Compare French putrescine (1892 or earlier). N.E.D. (1909) gives the pronunciation as (piutre·səin) /pjuːˈtrɛsaɪn/.
Chemistry.
An amine with a putrid odour, melting just above normal room temperature and formed by the putrefaction of proteins.Systematic name: 1,2-diaminobutane; H2N(CH2)4NH2.
ΚΠ
1887 A. M. Brown Treat. Animal Alkaloids i. iv. 36 Putrescine C4H12N2.—Like the preceding ptomaines is obtained from the flesh of the mammifera and herring brines.
1890 J. Cagney tr. R. von Jaksch Clin. Diagnosis v. 120 These observers..established the identity of Brieger's putrescin with tetramethylendiamine.
1934 C. C. Steele Introd. Plant Biochem. v. xiii. 133 Putrescine, a liquid, is tetramethylene diamine, NH2·(CH2)4·NH2, and a characteristic product of putrefying animal protein, being derived from the amino-acid ornithine.
1974 Nature 17 May 250/1 The polyamines spermine, spermidine and their precursor putrescine occur ubiquitously and in high concentrations in animals and plants.
1992 M. Ingrouille Diversity & Evol. Land Plants 141 There are monoamines like methylamine or diamines like putrescine and cadaverine whose names are testament to their pungency.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
<
n.1887
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。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/9/21 0:28:23