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Under the transmission election microscope, we had observed that the state of oocytes arid the cumulus cells around them was tightness, and there were plenty of long and thin microvilli playing the role of connection in the enwrapping. The shape of cumulus cells nucleus was ovate, and the longer and shorter diameters of the cumulus cells were 4.250±0.042μm and 2.750±0.07 μm respectively. The zona pellucida was well proportioned and tightly linking with oocyte. There were great deals of multi-crista mitochondria, lipid droplet and vacuolus. The mitochondria longer and shorter diameters were 0.600±0.106μm and 0.490±0.117μm. Granular nucleoplasma distributed very well in the cell nucleus.

电镜下,卵母细胞外的卵丘细胞紧紧包裹卵母细胞,且与卵母细胞之间有大量细长的微绒毛相联系;卵丘细胞核呈卵圆形,其长径为4250±0.042μm,短径为2.750±0.071μm;透明带均匀,与卵母细胞结合紧密;在皮质区集中分布大量的多峰型线粗体、脂滴和空泡,线拉体长径为0.600±0.106μm,短径为0.490±0.117μm;细胞核中颗粒状的核质分布非常均匀。

The CoFe2O4/TiO2 magnetic nano-photocatalysts has fairly good magnetic property. The X-ray diffraction, transmission electron microscopy and ultraviolet-visible technique were used to analyze the phase structure, size and spectrum response scope of the samples. The XRD indicated the anatase TiO2 was formed when TCF modified by plasma. The size of CoFe2O4 particles was about 20 nm. The diameter of CoFe2O4/TiO2 particles is in the range of 30~40 nm. So the shell of TiO2 enwraps closely around the core and the thickness is in the range of 10~20 nm.

运用VSM技术对样品磁性能进行研究,结果表明:等离子体修饰后的复合材料仍具有较高的饱和磁化强度,可在外加磁场作用下实现催化剂在水中的分离与回收;样品的XRD、TEM和UV-Vis分析测试结果表明:等离子体修饰后的复合材料有锐钛矿型TiO2存在;TEM谱图显示磁核CoFe2O4的平均粒径约为20 nm,TCF复合粒子的粒径约为30~40 nm,TiO2包覆层的厚度为10~20 nm。

On the other hand, UVB can do some damage to the main chain structure of DNA, and the damage to the structure of nucleotides was serious. Some glycoside bonds might be cut off and some purine and pyrimidine must be excided.

UVB能够对B型DNA的主链结构产生一定的损伤,但不会引起链的断裂,而其对核苷结构的损伤比较严重,有部分糖苷键可能被切断,有脱嘌呤或脱嘧啶情况发生。

Objective To construct the recombinant plasmid harbouring the encoding gene of Mus musculus metallothionein Ⅱ.

目的 构建含有小鼠Ⅱ型金属硫蛋白基因的真核表达载体,为进行MT抗氧化作用的体内功能实验奠定基础。

Necropsies were performed at 21 days post-challenge, the lymph nodes in the nonvaccinated but challenged pigs were larger than those of vaccinated pigs. The PCV2 genomic copy loads in lymph nodes were reduced in vaccinated pigs. Moderate amounts of PCV2 antigen were detected in most lymphoid tissues of nonvaccinated pigs. These data indicated that when given intramuscularly in pigs, the chimeric PCV1-2 live virus and recombinant plasmid induces protective immunity against PCV2 infection and could potentially serve as an effective vaccine.

攻毒后21天攻毒对照组猪淋巴结比免疫组猪显著肿大,免疫组猪血清、淋巴结中PCV2病毒载量低于对照组,攻毒对照组猪淋巴结中PCV2抗原含量高于免疫组,这些结果表明嵌合型猪圆环病毒PCV1-2及真核表达质粒肌肉注射免疫商品猪后,对PCV2感染能产生保护性免疫应答,有可能成为候选疫苗。

The results show that the steel in different solution has better performance of anti-hydrogen induced cracking,there is no cracking inside the steel; micro-cracking on the specimen surface mainly nucleates at pitting corrosion pits and expands along the polygonal ferrite; the expansion mode is mostly transgranular type, and the expansion terminates in acicular ferrite.

研究结果表明:该管线钢在两种溶液中均具有较好的抗氢致开裂性能,试样内部没有发现裂纹;试样表面的微裂纹主要在点蚀坑处形核并沿多边形铁素体扩展,扩展模式多为穿晶型,并终止于针状铁素体。

The results clearly prove an evolution mechanism of type B PLC shear bands, that is, a PLC shear band first nucleates at one side of specimen, then transversely runs through the entire specimen section with a certain angle, finally forms an inhomogeneous deformation bands.

实验结果清楚地证实了B型PLC剪切带的一种演化机制,即先在试样一侧成核,然后与拉伸轴成一定角度横向贯穿整个试样,最终形成非均匀塑性变形带。

Objective:To investigate the effects of endotoxin pretreatment on the secreting of TNF-α, and NO in peripheral blood mononuclear cells in rat.

目的:探讨内毒素预处理对单个核细胞分泌肿瘤坏死因子α、诱生型一氧化氮合酶和NO的影响。

The characteristics of on-off responses of medial geniculate body neurons to tone bursts of varying frequency, intensity and duration were affected by lateral amygdaloid nucleus stimulation, which was in form of altering the pattern of discharge or complete suppression. The effect also varied with the changes of the interval between amygdaloid stimulation and the tone bursts. The results of the present work show that LAm could modulate temporal processing of auditory information.

新西兰兔内膝体神经元的on-off反应与纯音刺激的强度、频率及作用时程有关;刺激边缘系统杏仁外侧核,可以抑制on-off反应,或是使on-off反应放电构型发生变化。on-off反应是神经元对声音信号作用时程及声音的起止进行编码的方式之一,LAm对on-off反应的影响表明,边缘系统杏仁体的活动可以调控听觉中枢对声音时间信息的编码。

In the first part,we studied the nucleophilic addition reactions of aldehyde, amine,Zinc and benzyl bromide in one pot to afford homobenzyl and homoallyl amines in moderate to good yields.

第一部分的工作中,我们研究了Barbier型条件下醛,胺,锌粉,溴试剂一锅法的亲核加成反应。这种反应可以高效的得到高苄基和高烯丙基胺类化合物。

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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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。