多分子的

Chiral centers of C5 and C8 are directly constructed in the key step of the diastereoselective propargylation from D--tartrate. The methylation and subsequent methoxycarbonylation result in desymmetrization of the terminal dialkynes. The α,β-unsaturated δ-lactone is synthesized after partial hydrogenation and lactonization.

由非天然酒石酸出发，利用双向非对映选择性的炔丙基化反应，在一步反应中同时构建C5和C8手性中心；然后通过末端炔基的甲基化、甲酯基化，延长碳链并对分子去对称化；内酯化得到关键中间体α，β-不饱和六元内酯，再经多步反应转化得到8-epi--Boronolide。

In products, there are many small molecule of albumen and lactoproteid which are processed by degradation. The products are natural food of biological calcium-supplement. They can promote absorption of calcium and can be mixed with any preparation of calcium so as to increase effects.

产品中含有较多经过降解的小分子骨胶原和乳蛋白，是纯天然的生物补钙伴侣，促钙吸收，可与任何一种单纯补钙制剂配合食用，提高其疗效。

In products,there are many small molecule of albumen and lactoproteid which are processed by degradation.The products are natural food of biological calcium-supplement.They can promote absorption of calcium and can be mixed with any prepara-tion of calcium so as to increase effects.

产品中含有较多经过降解的小分子骨胶原和乳蛋白，是纯天然的生物补钙伴侣，促钙吸收，可与任何一种单纯补钙制剂配合食用，提高其疗效。

If there is only one lipid bilayer, they are called unilamellar vesicles; otherwise they are called multilamellar.

只有一个脂双分子层的叫单膜小泡；其余的叫多膜小泡。

Although the genetic flaw that causes myotonic dystrophy was discovered in 1992, researchers studied the defect for many years before they had a clear understanding of the molecular events that ultimately produce the symptoms of the disease.

尽管引起强直性肌营养不良的基因缺陷在1992年就被发现，研究者在研究该缺陷多年后才清楚理解导致该病症状的分子机制。

Recently, phylogenetic analyses indicated the presence of bacterial phylotypes which are closely related to myxobacteria. Many reports on myxobacteria from marine environments have appeared by microbiologists.

然而随着研究的深入，人们利用分子生物学手段从许多海洋环境样品中检测到了粘细菌的存在并分离获得了多株海洋粘细菌。

This paper mainly studies the sound absorption properties of a new type of multilayered polymer composite materials with nonplanar interfaces at different temperatures and pressures.

主要研究非平面界面的新型多层高分子复合材料在不同温度和压力下的吸声性能。

Accumulated studies have found that the tumor cells and tumor-associated macrophages in tumor tissues such as ovarian cancer, lung cancer, breast cancer, renal cell carcinoma and adenoid cystic carcinoma overexpress B7-H4 molecules.

越来越多的研究发现，在肿瘤组织如卵巢癌、肺癌、乳腺癌、肾癌和腺样囊性癌等的肿瘤细胞以及肿瘤相关巨噬细胞中异常高表达B7-H4分子。

The technique of PAGE gel analysis has been widely used in separation of low molecular weight PCR product. Due to the overmany technical steps and large time consumption, this technique is disadvantageous to carrying out molecular marker analysis in large scale.

PAGE凝胶分析技术已广泛运用于小分子量PCR产物的分离，但因操作环节多、耗时长，不利于大规模分子标记分析工作的开展。

Periodontitis is a multi-factorial infectious disease that leads to the inflammation and destruction of periodontium.

牙周炎是一种多因子造成的感染疾病，其发炎反应可能与在牙周组织中调控发炎之转录分子NF-κB的表现有关。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。