carbamyl 中文意思是什麼
carbamyl
解釋
氨基甲酰基-
Hydantoinase ( ec 3. 5. 2 ) hydrolyzes its substrate 5 ' - monosubstantial hydantoin to enantiomerical n - carbamyl - amino acids and in turn, the resulting product can be chemically or enzymatically converted into the corresponding optically active amino acids
海因酶（ hydantoinase ， ec3 . 5 . 2 ） ，是一類催化海因、 5 』 -單替代海因及其衍生物環酰胺鍵斷裂的酰胺水解酶。 -
Synthesis and biological activity of disubstituted triazinyl carbamyl urea
芳甲酰基脲的合成及其生物活性 -
In bioconversion of a d - amino acid and its derivative, the substrate, 5 ' - monosubstituted hydantoin is firstly transferred into an intermediate, d - carbamyl amino acid by d - hydantoinase, and in turn into an optically active d - amino acid by either d - carbamoylase or chemical, nano2. nowadays, the bioconversion of d - amino acids has been industrialized by enzymes, so called one - step process
D -型氨基酸及其衍生物的生物轉化，經歷兩個反應歷程，首先是在海因酶的作用下，催化5 -單替代海因形成氨甲酰類氨基酸中間物，後者再在酶或化學的作用下，生成相應的光學活性氨基酸或其衍生物。 -
Abstract : study on the synthesis of n - methyl carbamyl chloride underdifferent ratio of input materials and the yield of the termination products methyl isocyanate. the yield is raised from 81. 89 % to 86. 23 %
文摘:研究了在其它工藝條件不變的情況下，改變光氣與甲胺的配比對合成n -甲氨基甲酰氯的影響。光氣甲胺（摩爾比）由1 35 1降至1 25 1 ，最終產物甲基異氰酸酯收率由81 89升高至86 23 。 -
As far as the enzymatic activity is concerned, on the one hand, strain yz - ii6 has higher d - hydantoinase activity and lower d - carbamoylase activity so as not to be suitable for one - step bioconversion of d - amino acids, on the other hand, the higher hydantoinase activity, engineered strain in particular, may be convenient to be as a biocatalyst to produce n - carbamyl d - amino acids which hard to find in the markets
Yz - 6菌具有較高的海因酶活性，但n -氨甲酰基d -氨基酸酰氨水解酶活性很低，仍不適合用於d -型氨基酸生產工藝中的一步法轉化。另一方面，含海因酶基因的人工菌株不但酶活性高，也排除了天然菌株轉化生產d -型氨基酸過程中的一些副產物。
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