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

单词	porphobilin
释义	porphobilin Biochem.\|pɔːfəʊˈbaɪlɪn\| [a. G. porphobilin (Waldenström & Vahlquist 1939, in Zeitschr. f. physiol. Chem. CCLX. 191), f. porph-yrie porphyria + -o + L. bīl-is bile: see -in¹.] Any of a group of red-brown pigments derived from porphobilinogen. 1939Chem. Abstr. XXXIII. 8777/1 Boiling in acid destroys I by conversion to a red porphobilin (II) with a mol. wt. of 750 to 800.1952Science 2 May 496/2 Solutions of porphobilinogen obtained by the above method, after having been acidified to pH 4·0 and boiled for 30 min, gave rise only to porphobilin, a dark-brown pigment without characteristic absorption spectrum or any porphyrin characteristics.1964A. White et al. Princ. Biochem. (ed. 3) xlii. 793 The urine darkens markedly on standing, because of the conversion of abnormal quantities of porphyrinogens and other heme precursors into porphyrins, porphobilins, and other unidentified pigments.
随便看	improlifical improlificate impromiscuous imprompt impromptitude impromptu improof improper improperate improperation improperium improperly improperness improperty impropery impropitious improportion improportionable improportional improportionate improportioned impropriate impropriated impropriation impropriator

英语词典包含277258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。