Polylactic acid (PLA) is a linear aliphatic polyester produced by poly-condensation of naturally produced lactic acid or by the catalytic ring opening of the lactide group.
聚乳酸(PLA)是一种线性脂肪族聚酯的聚乳酸中自然产生的或由丙交酯开环缩合催化剂组产生。
Another important group of petrochemical raw materials are the aromatic compounds, principally benzene, toluene and xylenes, which are mainly produced by catalytic reforming.
另一组重要的石油化学品原料是芳香烃化合物，主要是苯、甲苯和二甲苯，主要由催化重整制得。
Benzimidazolyl group exhibits catalytic activity in the way as intramolecular general-base catalysis in the hydrolysis of 3-(2'-benzimidazolyl)-3-hydroxy propionate.
在3-（2＇-苯并咪唑基）-3-羟基丙酸乙酯水解过程中，苯并咪唑基以分子内一般碱催化方式参与催化酯的水解反应。
A pilot orthoflow catalytic cracking unit suitable for investigations of the residumblending catalytic cracking process was developed by our researching group.
介绍了作者新研制的用于掺渣油催化裂化研究的同轴式催化裂化实验装置。
The dual-group hydrocarbon type rubber plasticizer was prepared using the heavy components in the production of heavy oil catalytic cracking by secondary deasphalting process.
以重油催化裂化装置生产的重组分油为原料，采用二次脱沥青精制工艺，可制备二元族烃型橡胶增塑剂。
Carbon nanotubes (CNTs) manufactured in a nano agglomerated fluidized bed by catalytic decomposition method usually group into agglomerates.
纳米聚团床催化裂解法制得的碳纳米管均以团聚体形式存在。
Moreover, catalytic hydrogenation can be used to the reduction of a variety of organic compounds, such as nitro, carbonyl, amino, aromatic and heteroaromatic compound, hydroxy group and carboxy group.
此外，它除了还原双键以外可以用来还原各种不同的有机化合物，如：硝基、羰基、氨基、芳香族及杂环化合物、羟基、羧基。
Catalytic active site by the group and the combined group, who co-polymer with a three-dimensional structure.
活性中心由催化基团和结合基团，他们与高分子共同构成一个立体结构。
Although having great variance in sequence, group I introns share a number of conserved base-paired regions, which take part in the formation of the catalytic structure.
型内含子的序列差异很大，但是它们都具有保守的碱基配对区，即保守的二级结构。
Many of this type of catalysts containing Pt-group metals have been discovered by far, and have high yield and catalytic selectivity.
此处介绍的是目前国外已发现的多种这类反应的以铂系金属为主的催化剂。它们大多数具有高的催化转化率和很好的选择性。
The catalytic system has excellent functional group tolerance.
该体系具有较好的官能团容忍性。
The catalytic system has excellent functional group tolerance.
该体系具有较好的官能团容忍性。
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