酯

The isothermal DSC analysis showed that the Ruleless Coring Mechanism, Diffusion Mechanism and Phase Interface Mechanism would control the reaction of isocyanate and cellulose with different MC. The key effects of complicated mechanism rest with water transference and fast reaction of isocyanate and water.

等温DSC 研究揭示含水纤维素与异氰酸酯反应时，存在无规成核机理、扩散机理和相界面机理等多种情形，水分迁移作用和异氰酸酯与水反应速率较快是致使异氰酸酯与含水纤维素的反应机理复杂的关键。

Macrolide antibiotics, such as chloramphenicol and deoxycycline, have good therapeutic effects on scrub typhus. Macrolide antibiotics also have fewer side-effects, and they are suitable for pregnant women, puerperant, and infants with scrub typhus. Azithromycin may be used as a first-line drug.

大环内酯类药物、氯霉素和强力霉素对恙虫病均有较好疗效，而大环内酯类抗生素副作用小，孕产妇、婴幼儿及肝肾功能受损等病人适用大环内酯类抗生素治疗恙虫病，其中阿齐霉素为首选。

Solani. The extract was further separated into two parts and one part separated by ethyl acetate while the other was separated by petroleum ether. Based on the inhibition experiment against R. solani, ethly acetate extract has a rather strong effect on R. solani with 89.70% inhibition rate and 15.52 mgmL^(-1) EC 50.The effect of petroleum ether extract on R. solani is relatively weak. The former was again divided into five parts in silica gel column, of which the second part significantly inhibits R. solani. During the periods of 24 and 48 hrs, the inhibition rate of the second part on R. solan is respectively 89.58% and 80.36%.

结果表明：鸭粪乙醇提取物对水稻纹枯病菌有抑制作用，24h内最高菌丝生长抑制率和EC50分别为88.64%、26.11mgmL^(-1)；鸭粪乙醇提取物经萃取分离得到石油醚和乙酸乙酯两种组分，其中石油醚组分抑菌效果较弱，乙酸乙酯组分抑菌能力较强，其对水稻纹枯病菌抑制率为89.70%，EC50为15.52mgmL^(-1)；对乙酸乙酯组分进行硅胶柱层析分离得到5种流份，其中第2流份有显著抑菌活性，在24h和48h内对水稻纹枯病菌的抑制率分别为89.58%和80.36%。

Using tapioca starch as raw material to prepare oxidized starch is better if we need the oxidized starch with low viscosity,can be used with high concentration starch slurry, and good transparency, good whiteness, low retrogradation and syneresis. Then, the research of using oxidization technology to improve the properties of tapioca crossed-linked and esterified starch was also researched: under the conditions of

然后，研究了应用氧化技术来改善木薯交联酯化淀粉的性能，在次氯酸钠用量为0.2%， pH8.5恒定反应，室温反应，反应过程不控温的反应条件下对木薯交联酯化淀粉进行氧化，可以在保持其交联酯化淀粉的应用性能不改变的前提下，大幅度提高产品的透明度，改善了产品应用性能。

Products: 3 - benzoyl-ethyl acrylate (97% min), acyl phosphorus acid methyl ester (98% min), P acyl three ethyl acetate (98% min), a phosphorus acid acyl The ethyl esters (98% min), 3 - bromine -1,3,4,5 - tetrahydrocannabinol -2 H-1-benzo-Aza Zhuo -2, 1 - naphthalene-tetrahydrocannabinol (98% min), 3,5 - dimethyl benzoyl chloride (99% min), 3,5 - dichloro benzoyl chloride (97% min), the ethyl benzoyl chloride (99% min), a TCA Ester (99.5% min), o-benzoyl methyl benzene (99% min), 4 - phenyl benzophenone (99% min): glacial acetic acid (99% min), methanol (99% min), liquid chlorine (99.5% min), caustic soda (30% min), isopropyl alcohol (99% min), anthranilic acid (99% min), dichloroethane (99% min ), Chunben (99% min), toluene 99% min

3-苯甲酰基丙烯酸乙酯（97%min）、磷酰基乙酸三甲酯（98%min）、磷酰基乙酸三乙酯（98%min）、磷酰基乙酸甲酯二乙酯（98%min）、3-溴-1，3，4，5-四氢-2H-1-苯并氮杂卓-2酮、1-四氢萘酮（98%min）、3，5-二甲基苯甲酰氯（99%min）、3，5-二氯苯甲酰氯（97%min）、对乙基苯甲酰氯（99%min）、氯乙酸甲酯（99.5%min）、邻苯甲酰基苯甲酸甲酯（99%min）、4-苯基二苯甲酮

Methacryloyloxydecyl-2-thiouracil-5-carboxylate was synthesized from the reaction of thiouracil with diethyl ethoxymethylene malonate and ω-hydroxy-decyl-methacrylate.

以硫脲、乙氧基次甲基丙二酸二乙酯和甲基丙烯酸ω-羟癸酯为主要原料合成了一种新的粘接性单体10-甲基丙烯酰氧癸基－2-硫脲嘧啶－5-羧酸酯。

Nitratomethyl-3-ethyloxetane was synthesized by the process of cyclization, nitation from trimethlolpropane and diethyl carbonate, and the homopolymer of 3-nitratomethyl-3-ethyloxetane was synthesized with 1,4-butanediol as initator and boron trifluoride etherate as an catalyst by cationic ring-opening polymerization.

以三羟-甲基丙烷和碳酸二乙酯为原料经环化、硝化两步反应合成了化合物3-硝酸酯甲基－3-乙基氧丁环；采用1，4-丁二醇为引发剂，三氟化硼乙醚(BF3Et2O)为催化剂，NIMEO发生阳离子开环聚合得到一种端羟硝酸酯均聚醚PNIMEO。

This paper introduced the quantitative analysis method of kresoxim-methyl technical by gas chromatography with HP-5 capillary column and using triphenyl phosphate as internal standard.

介绍了醚菌酯原药样品的气相色谱定量分析方法，选用HP - 5石英毛细管柱，以磷酸三苯酯为内标物，进样口和检测器温度均为 2 5 0℃，柱温为 2 30℃，对醚菌酯原药进行测定。

The descriptions of 300V and 8100 X-lite have only uninformative words about "100% Synthetic - Double Ester Technology" or "100% Synthetic - Ester Based", but how much esters contained in motor oils exactly?

在300V和8100 X-lite的包装说明上有著不太资讯化的字眼有关100%合成油-双酯科技或者100%合成油-酯类基础油，但有多少比例的酯类在这机油内呢？

S40Q enhanced the esterase activity 1.2-fold when p-nitrophenyl butyrate was used as the substrate; S40G increased the esterase activity 1.2-fold when p-nitrophenyl valerate was used.

以对硝基苯丁酸酯为底物，S40Q使AIbD酶酯酶活性提高1.2倍；以对硝基苯戊酸酯为底物，S40G使活性提高1.3倍。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。