lactone bond

Heparin was covalently bonded to the PU surface by ester bonds after surface activation and use of amplification polymers.研究了1种新型聚氨酯材料表面结合肝素的方法,材料表面经过活化,引入活性位点放大剂及扩链剂,肝素分子以酯键方式共价结合到聚氨酯材料表面,其表面肝素结合最高,可达(7 224±0 094)×10-2g/m2,肝素活性高,体外抗凝血性检测PT>169s,APTT>249s,能够应用于聚氨酯人工生物材料的生物相容性改进。eho汉语字典

Vinyl ester resin was modified by urethane ended by ethanol,grafted with strong polar urethane links in side chains and synthesized into a new underwater grouting material,the viscosity of whichwas lower than 100mPa.通过乙醇封端的二异氰酸酯,对乙烯基酯树脂进行改性,在其侧链上接枝上强极性的氨酯键,合成了一种黏度低于100mPa。eho汉语字典

The contents of C O S, C S and inert S in soils were 130.供试土壤中酯键硫 (C -O -S)、碳键硫(C -S)、惰性硫平均含量分别为 130 。eho汉语字典

Catalyzation of Gallic Acid Ester Bond by Tannase in Organic Solvents有机介质体系单宁酶生物合成??酸酯键的研究eho汉语字典

Catalyzation of Gallic Acid Ester Bond by Tannase in Organic Solvents;有机介质体系单宁酶生物合成棓酸酯键的研究eho汉语字典

Studies on the Synthesis and Hydrolyzation to Phosphodiester Bond of Saccharide-REE Complexes;糖稀土复合物的制备及水解磷酯键活性的研究eho汉语字典

Synthesis and Performance Study on Cationic Gene Vector Linked by Carbamate;氨基甲酸酯键阳离子基因载体合成及性能研究eho汉语字典

Investigation on the New Borate Ester Bonding Agents for the High Energy Four Groups Hydroxy-Terminated Polybutadiene Propellant;高能丁羟四组元复合固体推进剂用新型硼酸酯键合剂研究eho汉语字典

Synthesis, Characterization and Hydrolysis to Phosphaester-bond of Amino Acids Complex with Alkaline-Earth Metals;氨基酸碱土金属配合物的合成、结构表征及对磷酸酯键的水解作用eho汉语字典

Hydrolysis of Phosphoester Bond by Plantago asiatica L. Crude Polysaccharide and Its Cerium Complex大粒车前子多糖及其铈配合物对磷酯键的水解作用eho汉语字典

Rapid and Efficient Synthesis of Ester-Type Molecular Tweezers Derived from Hyodeoxycholic Acid in Solvent-Free Conditions under Microwave Irradiation微波促进无溶剂条件下酯键型猪去氧胆酸分子钳的快速有效合成eho汉语字典

Synthesis and characterization of mono-capped polyurethane-acrylate macromonomer with a vinyl group双键单封端聚氨酯丙烯酸酯大分子单体的合成及表征eho汉语字典

Keywords: molecular dynamic; polycarbonate; amorphous structure.关键词：动态分子模拟、聚碳酸酯、非晶质结构。eho汉语字典

And ester-Cig silica bonded phase was prepared indirectly using the silane coupling agent as intermediate.采用间接法制得酯型十八烷基硅胶键合相。eho汉语字典

Study on Several Dominating Problems of the Emulsion Polymerization of Vinyl Acetate;聚醋酸乙烯酯乳液聚合若干关键问题的研究eho汉语字典

The Key Enzymes from Apple Wine Yeasts for Esters Synthesis;苹果酒酵母中合成酯类化合物关键酶的研究eho汉语字典

Study on the Synthesis of β-Enamioesters as the Important Intermediates of Levofloxacin左氟沙星关键中间体β-烯胺酯的合成研究eho汉语字典

The key to treating waste water of polyester production is to control the source discharge and reduce the abnormal pollutant.聚酯生产的废水处理关键是要控制源头排放，减少非正常的污染物。eho汉语字典

Stuhies on the Synthesis of the Key Intermediate 3-exomethylenecepham Sulfoxide Ester;GCLE关键中间体3-环外亚甲基头孢亚砜酯的合成研究eho汉语字典

Genetic Transformation of the Key Genes in Ginkgolides Biosynthesis Pathway;银杏萜内酯代谢途径中关键酶基因的遗传转化研究eho汉语字典

Synthesis of α-thio esters and nitriles via cleavage of S-S bonds promoted by Zn/I_2 in DMFZn/I_2促进的S—S键断裂用于合成α-硫代酯和α-硫代腈eho汉语字典