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However, there are many problems in this process, such as the keratin molecular weight being relatively low, the keratin molecular being easy to become globular protein, and difficult to be stretched along the fiber axis during spinning process.

废弃羊毛的再生利用一直为人们所关注,目前基本沿用化学溶解再成形的方式,但存在溶解后角蛋白分子量低,分子蜷缩成团,不易取向伸直,难以纺丝成形等诸多瓶颈。

An algorithm for displaying molecular ball-and-stick model has been provided, and the algorithm for molecular space-filling model has been improved.

提出了分子球棒模型的显示算法,发展了分子空间填充模型的算法。

A program——VRMLMaker has been developed for the 3D chemical structure display on the Internet in our chinese drug database retrieval system. VRMLMaker can convert a molecular MOL2 or ML2 format file to VRML format files in four different styles:wire-frame, capped sticks, ball-and-stick, and a CPK space-filling model. VRMLMaker is developed based upon molecular model and virtual reality modeling languagetechniques. The working procedures of VRMLMaker are described.

何敏在开发基于Internet的中药信息检索系统时,为了解决三维(3D)化学结构在Internet上的传输和显示问题,利用分子模型和描述3D世界的虚拟现实模型语言等技术开发了一个可以把化学的MOL2或ML2格式文件转换为球棍型、空间充满型、线型、棍型等4种虚拟现实模型语言格式文件的软件。

Smoking,drinking,can be made the fibrinogen molecular reactivity strengthen the content of plasma fibrinogen and fibrinogen molecular reactivity suffer by the physiology factor,heredity factor,behavior habit,living to turn the index sign,disease factor,the common function of the social factor.

纤维蛋白原浓度及其分子功能受生理因素,遗传因素,行为习惯,生化指标,疾病因素,社会因素的共同作用。

In the present dissertation, a surfactant-templated mesoporous silica molecular sieve with high pore volume, high porosity and narrow bimodal mesopore size distribution was synthesized for the first time in a reaction system, which was used usually in the synthesis of mesoporous MCM-41 molecular sieves, by a judiciously controlled two-phase sol-gel processing under basic conditions.

在本论文中,我们通过对一个通常用于制备介孔MCM-41分子筛的反应体系中正硅酸乙酯水解与缩合反应相对速率的精确调控,首次在弱碱性体系中合成了一种具有高孔隙率、大孔体积和双介孔孔分布特征的新型二氧化硅分子筛材料,简记为BMS,并对BMS二氧化硅分子筛中双介孔结构形成的原因及各种可能对其结构和性质产生影响的合成因素如Ammonia/silica摩尔比、组分浓度的变化、表面活性剂烷基链长度的调节、辅助有机物均三甲苯的引入、催化剂的结构和性质、溶剂和助溶剂的极性和用量、老化和干燥条件的变化及合成后水热处理等,利用不同的测试手段如XRD,SEM,TEM,〓Si MAS NMR,TG-DTA,N〓吸附测试等进行了系统的表征研究。

The concrete steps are: the lactic acid and small-molecule dicarboxylic acid react under the condition with the presence of the catalyst to directly polymerize the carboxyl-terminated lactic acid prepolymer; then the aliphatic polycarbonate diol and the catalyst are added; with the presence of the N2, the reaction is kept for 1 to 10 hours at the temperature of 150 to 200 Celsius system to get the poly lactic acid and polycarbonate copolymer of the low molecular weight; then the reaction is done in the twin-screw extruder at the temperature of 150 to 190 Celsius system to screw out the extension chain; finally the polylactic copolymer of the high molecular weight, toughness and heat resistance is made.

具体步骤是:乳酸和小分子二元酸在催化剂条件下反应直接缩聚合成羧基封端的乳酸预聚物,然后加入脂肪族的聚碳酸酯二元醇和催化剂,在N 2 气氛下,抽真空,在150~200℃温度下,反应1~10小时,得到低分子量聚乳酸/聚碳酸酯共聚物,然后在双螺杆挤出机中在140~190℃下,进行反应挤出扩链,最终得到高分子量的、韧性与耐热性较好的聚乳酸共聚物。

Firstly, we should prepare polyester glycol in order to prepare water-borne polyurethane emulsion used to wooden furniture. Polyester glycols having designed molecular weight of 1000 are synthesized by ethylene glycol and mixture of phthalic anhydride and adipic acid (morl radio =40:60)on condition that molar excess content of glycol is 15%, and high vacuum time is 8h.The produced polyester glycols having the same molecular weight as designed measure up to standard of material. And Water-borne polyurethane emulsion's hardness is better than others are produced by aliphatic polyester glycol.

为了制得性能优越木器用水性聚氨酯乳液,首先我们从制备水性聚氨酯用的原料聚酯二元醇入手,我们设计了分子量为1000的聚酯二元醇,它使用邻苯二甲酸酐和己二酸以摩尔比40:60混合后再与乙二醇反应,反应时醇的摩尔过量15%,真空时间8小时,所得的聚酯二元醇,在此条件下酸值基本上能符合用作聚氨酯原料的要求,所测得的分子量也与设计的分子量非常接近,且用它来制得的水性聚氨酯乳液,其涂膜硬度,相对于单独用脂肪族聚酯二元醇制备的水性聚氨酯的要优。

Molecular mechanics and molecular dynamics methods have been used to investigate the glass transition of three different configuration of polypropylene.

应用分子力学和分子动力学的方法对3种不同构型聚丙烯高分子的玻璃化转变温度进行了模拟。

The molecular form of calcium found in beef bone meal can cause the Toy Poodle dietary distress, but the molecular form of calcium found in oyster shells is assimilated well by the Toy Poodle.

在牛肉的肉骨粉发现钙分子形式可能会导致玩具贵妇狗饮食困扰,但在牡蛎壳中钙分子形式是同化的玩具贵妇狗好。

With the development of molecular biology and genetic engineering of the plant, some achievements about genetic improvement of white clover have been obtained on molecular level.

随着分子生物学和植物基因工程的发展,在分子水平上对白三叶进行遗传改良的研究已经取得了部分成果。

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推荐网络例句

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了,排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意,我建议我们在价格上大家各让一半。

After an hour and no pup, look for continued contractions and arching of the back with no pup as a sign of trouble.

一个小时后,并没有任何的PUP ,寻找继续收缩和拱的背面没有任何的PUP作为一个注册的麻烦。