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The hydrolytic degradation research results showed that the PDLLA molecular weight was first degraded, then the weight loss happened in normal saline, and the water soluble crystallizable oligomers were formed during the process of degradation. The thermal degradation research results showed that the thermal degradation of PDLLA is a random breaking process, the molecular weight was degraded at range of 100癈~250癈, only above 250癈, the weight loss was found.

通过研究PDLLA的生理盐水降解性能和热降解性能，发现PDLLA在生理盐水中首先发生分子量降解，然后产生重量损失，且降解过程中生成具有晶体结构特征降解产物；PDLLA的热降解是一个无规的断裂过程，在100℃～250℃范围内，PDLLA的分子量迅速发生降解，在250℃以上，低聚物相继发生裂解，产生重量损失。

As a new molecular cytological method, it has widely been used in cellular genetics and molecular biology.

作为一种新型的细胞分子遗传学技术，目前已广泛应用于细胞遗传学、分子生物学等领域。

In this paper, we reviewed the advances in this area with some important grasses such as Lolium L. Dactylis L., Festuca L., Feymus Hochst, and Elymus L., in which included the screening of molecular markers and construction of molecular genetic maps, gene clone, and transgenetic grasses et al.

以黑麦草属、鸭茅属、羊茅属、赖草属和披碱草属的几种&模式牧草&为重点，从分子标记研究、遗传图谱绘制、基因克隆以及遗传工程等方面对这些研究进展进行了综述。

Plant Virology 2 S T. H. Chen, FThe course will give conventional and molecular level of plant viruses in order to help the students to get much theoretical and practical knowledge about plant virology. The contents cover the molecular structure of virion and genome, virus isolation, dentification and purification, transmission, variation,ecology, nomenclature and classification, diagnosis and control.

本课程除传统植物病毒学范畴外，并涵盖从分子层次讨论植物病毒之构造，引起之植物病害，田间发生及防治，期能达到理论与实务并重；内容包括植物病毒分子层次的构造及核酸组成，病毒分离、鉴定与纯化，在寄主体内之增殖及转移，媒介传播、遗传及变异，其引起之病害及田间发生生态与防治。

Trisodium salt of N,N,N'-ethylenediamine triacetic acid was prepared by hydrolyzing 2-oxo-1, 4-piperazine diacetic acid(3-KP) in the strong base solution. Then it was combined with lauroyl chloride, hexadecanoyl chloride and benzoyl chloride respectively. N-lauroyl-ED3A and N-hexadecanoyl-ED3A were prepared in succsess. The molecular structure of N-lauroyl-ED3A was characterized by ~1HNMR and ~(13)CNMR. The molecular structure of N-hexadecanoyl-ED3A was characterized by 1HNMR.

将3-KP 在强碱性条件下水解，生成ED3ANa3 的水溶液，然后分别与月桂酰氯、棕榈酰氯和苯甲酰氯反应，成功制得N—月桂酰基ED3A 和N—棕榈酰基ED3A，并用~1HNMR 和~(13)CNMR 对N—月桂酰基ED3A 的分子结构进行了表征，用1HNMR 对N—棕榈酰基ED3A 的分子结构进行了表征。

According to the intrinsic viscosity in dichloroacetic acid at 25℃, the molecular weight of polymers were estimated to be 20, 000～50, 000.Because of the thermal instability of the urea bond in molecular chain, all synthetic polymers began to degrade around 220℃, and had no melting point.

由于模拟聚合物中所含的脲键存在着热不稳定性，所有聚合物的热分解温度都在220℃附近（低于天然动物丝蛋白分解温度），并且所有聚合物样品在熔融之前已开始分解；另外只有分子量比较大的模拟聚合物P4有明显的玻璃化转变（T〓=107℃）。

The main components for ISR including low molecular weight polysaccharide, glycoprotei^ low molecular weight polypeptide are diffusible.

作为激发子的水杨酸和生物因子都是近年来的研究热点。

In order to understand the drug resistance mechanism of HIV-1 integrase mutually existed for multiple drug-resistant strains to the most potent IN inhibitors diketo acids, three S-1360-resistant HIV-1 strains were selected and molecular docking and molecular dynamics simulations were performed to obtain the inhibitor binding modes.

为了解DKAs引起的多种耐药株共有的耐药性机理，选择3种S-1360引起的IN耐药突变体，用分子对接和分子动力学模拟，研究了野生型和突变型IN与S-1360的结合模式，基于该结合模式探讨了3种耐药突变体所共有的耐药性机理。

These data were used to infer the molecular formula and the elemental compositions of all the fragmental ions through software interpretation and, by further applying fragmentation regularities of mass spectrometry, the majority of ions were fully assigned. A base peak at m/z 402 in the mass spectrum was found as the molecular ion. The fragments were created mainly from the fragmentations of the tetrahydrofuran rings and the hydroxyl group. The most fragment products contain the dimethoxy phenyl group.

利用这些数据通过软件导出了分子式和所有碎片离子的元素组成，由此进一步根据质谱裂解规律对石梓醇分子的电子轰击质谱的主要裂解碎片给出了完全的归属，质谱中发现基峰为分子离子峰(m/z402)，裂解碎片主要来自双骈四氢呋喃环的裂解和羟基引起的裂解，绝大部分裂解产物包含二甲氧基苯基基团。

Molecular weight and molecular weight distribution and dissociative sulfate content were determined by these methods respectively.

结果表明在所选择的实验条件下，916对溶菌酶和胰蛋白酶是稳定的，可以推定，在血清中916不会被这两种酶降解。

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。