杂交

The per unit area yield of rice in China has been increased significantly since the rice breeding for dwarfness was extended and hybrid rice was bred and applied from 1960-1970's.

自20世纪60-70年代推行矮化育种和杂交水稻选育与推广以来，我国水稻单产水平有了大幅提高。

The populations are infertile with other ecotypes of the same ecospecies.

这些群体与其他同种异型的物种不能杂交。

Thus this study focus on the the effects of mechanical forces and 1,25- 2D3 on the expression of ODF and OCIF by periodontal tissue in vivo and periodontal ligament cell and osteoclast in vitro,thus clarify the molecular biology mechenism of tissue remodeling,and explore a new way in orthodontic clinic to accelerate the dental movement speed by adding some ectogenesis stimulating factors.

研究内容如下：一牵张力作用下牙周组织ODF及OCIF表达变化的研究目的：运用原位杂交的方法，观察ODF及OCIF在正畸大鼠牙周组织改建过程中张力侧的表达变化，探讨ODF及OCIF与正畸牙周组织改建的关系。

We also isolated a structurally distinct 4-cysteine (4cys) hepcidin from an Antarctic eelpout that is unrelated to the notothenioids but inhabits the same freezing water.

利用基因组PCR和Southern杂交鉴定发现4cys_hepcidin只特异的存在于南极鱼中，而在非南极鱼(non-Antarctic taxa)中则没有发现，表明了这种分子内半胱氨酸残基数目的减少是对南极极端环境的一种适应机制。

Among them, McAb-14, McAb-18 and McAb-21 had strong neutralization characteristics, and there was strong correspondence between the neutralization efficacity and the haemagglutination inhibition value.

应用杂交瘤技术，以纯化的NDV-lasota为免疫原结合间接ELISA筛选到了24株抗NDV单抗，其中3株（McAb-14、MoAb-18和McAb-21）具有中和活性，并与其血凝抑制效价具有很大的相关性。

Methods To establish asphyxia models of low degree,moderate degree and severe degree of SD,collected samples of gastric mucous membranes,and by using electroscope and DNA electrophoresis to examine cell appotosis;by using RNA dot blot and immunohistochemistry to examine expressed levels of fas gene and FAS protein.

方法用20只新生SD大鼠建立轻、中、重度窒息模型，采集胃粘膜标本，分别进行电镜、DNA电泳检测细胞凋亡是否存在；采用RNA打点杂交及免疫组化技术检测凋亡基因窒息模型。

We have obtained 16 cDNA fragments binding to the elicitor response cis-element from rice cDNA expression library using yeast one-hybrid system.

利用酵母单杂交体系，我们从水稻的cDNA库中分离到16个阳性克隆。

Based on hemagglutination specificity test,absorption and eluate test,and hemagglutination inhibition assay,it was showed to be specific only for the human H blood ...

杂交瘤细胞在液氮中贮存1年，分泌抗体能力不变。抗体经56℃保温30min及-20℃和37℃反复冻融试验，凝血活性保持稳定。可望能取代传统的抗H试剂而用于临床血型分型。

The emasculation method is effective and rapid for carrot, and the heredit of important characters could be further studied.

因此，本方法可快速有效去除胡萝卜雄蕊，进行自交系之间的杂交，为深入开展优异基因的聚合及胡萝卜重要农艺性状的遗传规律研究奠定了基础。

CMS and utilization of fertility restorer system have made a breakthrough in conquering breeding bottleneck by artificial emasculation and unfolded a bright outlook for promoting commercial production of hybrid seed.

利用棉花细胞质雄性不育和育性恢复系统突破了传统人工去雄杂交育种的瓶颈，为棉花杂交种制种的商业化推广展现了光明的前景。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。