微核

In order to find the reason of population decline and assist conservation, the genetic diversity of great bustard was analyzed by microsatellite DNA and mtDNA control region markers. In study using microsatellite DNA markers, Three microsatellites from great bustard O.

为了解东方亚种濒危的现状并为制定科学、有效的保护措施提供科学依据，本研究利用核微卫星DNA和mtDNA控制区序列，从父系和母系两方面对大鸨东方亚种的遗传多样性进行了研究。

The results showed that chemisorption of Hg atoms could facilitate dislocation emission and motion.

结果表明：加载裂纹吸附Hg原子后能促进位错的发射、增殖和运动；当吸附促进位错发射和运动达到临界状态时，脆性微裂纹就在原裂纹顶端或在无位错区中形核并解理扩展。

The results showed that chemisorption of liquid metal atoms could facilitate dislocation emission ,multiplication and motioll.

结果表明：液体金属吸附后能促进位错的发射、增殖和运动；当吸附促进位错发射和运动达到临界状态时，脆性微裂纹就在原裂纹顶端或在无位错区中形核并解理扩展。

Whether respiration related nuclei such as nucleus retrofacialis might play a role in the mechanism of central chemoreception on respiraton or not was also studied using the methods of local HRP application, microinjection and microiontophoresis.

采用延髓腹外侧表面敷贴HRP、微量注射酸化人工CSF及微电泳H〓的方法，探讨了呼吸相关核团NRF是否也参与延髓腹外侧表面的化学感受功能。

Results This material had no cytoxicity,no s en-sitivity,no obvious haemolysi s,an d no mutagencity in Ames test,mice marrow micronucleus test and chromo so me aberration test of mammalian cell in vitro.

Ames试验、小鼠骨髓细胞微核试验和哺乳细胞体外染色体畸变试验结果显示材料无致突变性。结论Evergel人工髓核材料具有良好的生物相容性，可以进行临床应用。

The process of material damage can be divided into three stages: nucleation, growth and coalescence of microdamage.

材料的变形和破坏一般经历微损伤的成核、长大和汇合等过程。

As they are evenly dispersed throughout genomes, usually characterized as codominant and highly polymorphic systems amenable to genotyping by polymerase chain reaction, and generally inherited in a Mendelian fashion, microsatellites have become instrumental as genetic markers in many areas.

摘 要：微卫星标记广泛分布于原核生物和真核生物基因组中，具有密度大、多态性丰富、遵循孟德尔分离定律共显性遗传、易于PCR扩增等特点，已成为近年来最引人注目的新型DNA标记。

The bioinformatics analysis showed that the gene had the highest homology with the gene of Penicillium janthinellum, which reached up to 76%. The first 26 amino acids might be a signal peptide sequence with the hydrophobicity of up to 2.63. The CBHⅠ gene consisted of the catalytic domain, convergence zone and cellulose-binding domain and its tertiary structure was mainly composed of 3-sheets.

分别扩增到鹅源草酸青霉F67纤维素酶CBHⅠ基因片段A(EU574736)、5'端序列B1(EU603295)、3'端序列B2(EU652768)及全长基因C(EU727171)，并成功构建真核表达载体pPIC9K-CBHⅠ；生物信息学分析表明，该基因蛋白序列与微紫青霉氨基酸序列同源性最高，达76%，前26个氨基酸为信号肽序列，疏水性可达2.63，由催化功能域、衔接区和真菌性纤维素结合域构成，其三级结构主要为β-sheet。

The results of the experiments indicate that the examiners of glass-ceramic which manufactured with P2O5 as nuclear of crystallization in the Li2O-ZnO-SiO2 system included cristobalite, Li2O.

实验结果表明：在Li_2O-ZnO-SiO_2系统中，以P_2O_5为晶核剂，研制出的微晶玻璃中的主晶相有方石英，此外还有Li_2O。

In this research, the ~ and F2 of the crosses between a natural mutant 慪34?with super-minute grain and 慪38?with super-large grain,慡huhui 881擲huhui 527?with middle grain size were carried out to study the inheritance of the grain shape (grain length, grain width, grain thickness and grain length/width ratio) and 1000-grain weight. The main results are summarized as below:? The F1 grain length, grain width, grain thickness and 1000-grain weight of three crosses were lay between the two parents and tended to Y34, which indicated that those grain traits were all governed by the dominant effect of Y34 and influenced by both female and male parents. The differences of F1 grain length, grain width, grain thickness and 1000-grain weight of positive and negative crosses between Y38 and Y34 indicated the existence of cytogene effects.? The broad heritabilities of major grain traits were calculated.

本研究利用一份水稻极小粒自然突变材料Y34与一份水稻极大粒材料Y38、两份常规籽粒大小材料蜀恢881、蜀恢527的杂交F_1及F_2，对主要粒形性状（粒长、粒宽、粒厚、长宽比）及千粒重进行了遗传研究，根据遗传研究的结果利用微卫星标记结合F_2群分法对控制Y34短粒性状基因进行了分子标记定位，主要结果如下：●各组合F_1粒长、粒宽、粒厚和千粒重介于双亲之间且明显偏向于小值亲本 Y34，这表明粒长、粒宽、粒厚和千粒重均主要受小值亲本显性基因的控制并同时也受大值亲本核基因的影响。Y34与Y38正反交F_1在粒长、粒宽、粒厚、千粒重等性状上存在差异，表明存在细胞质效应。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐