细胞发生

Objective To investigate effects of different doses of recombinant human bone morphogenetic protein-2 (rhBMP-2) on vascular endothelial growth factor expression in fetal moose osteoblasts. Methods Calvaria osteoblasts of fetal once of 19 days were cultured.

目的 通过不同剂量重组人骨形态发生蛋白－2(rhBMP-2)刺激原代培养的小鼠胚胎成骨细胞，探讨BMP-2对成骨细胞血管内皮生长因子表达的影响及规律。

Our research work is currently focused on the molecular mechanisms of vascular cambium periodicity regulation and secondary xylem development, including cambial cell differentiation, secondary wall formation and programmed cell death.

本实验室以杨树、杜仲等树木作为实验材料，采用剥皮再生创伤系统和整体系统，研究维管形成层活动周期调控及形成层发生、次生木质部细胞分化、次生壁形成和细胞程序死亡的分子机理，为定向改良木材材质提供理论指导。

The activities of succinate dehydrogenase in hepatocytes, alkaline phosphatase and thiamine pyrophosphatase on the wall of bile canaliculi became obviously less.Both the activities and localizations of TPPase had changed. Some TPPase from the damaged lysosome-like vesicles and Golgi saccules of hepatocytes discharged into the cytoplasm. TPPase reaction product in some bile canaliculi decreased.

酶细胞化学技术显示肝细胞线粒体琥珀酸脱氢酶和毛细胆管壁上的碱性磷酸酶活性明显减弱或消失，焦磷酸硫胺素酶的活性及定位也发生了改变， TPPase从损伤的高尔基复合体及溶酶体样小泡漏出进入胞浆，部分毛细胆管壁上的TPPase反应物减少。

The article reviews mechanism of action of caroid artery resulting from hypertension, especially debates vascular endothelial injury resulting from shear stress of vascular wall caused by hypertension, which can also affect vasopermeability by affecting the morphans, structure and function of vascular endothelium.

本文综述高血压引起颈动脉狭窄的发生机制，重点探讨血压对血管壁所造成的切应力引起的血管内皮细胞受损，通过影响血管内皮细胞的形态、结构和功能，并影响血管通透性，从而有助于脂质沉积的病理学机制。

Ovule development began in August, and rectangle megasporocyte began to occur in December, and linear tetrads of megaspores were formed in meiosis. In most occasions, only the chalazal megaspore was functional.

云南红豆杉胚珠从8月开始发生，大孢子母细胞12月开始发生，呈方形，减数分裂后形成4个&一&字形大孢子，在大多数情况下，只有靠合点端的大孢子发育为功能大孢子。

In this study,we firstly described anovel form of chemoresistance,which we termed sudden drug resistance,in apoptosis of human leukeamic U937cells.

进一步的研究表明这种快速耐药的发生与放线菌酮本身诱导的细胞粘附，尤其是细胞间粘附有关。

The formation and development of CNV is a complicated pathologic process. Because the abnormal proliferation of choriocapillary endothelial cells plays a key role in formation of CNV, so if we can inhibit the ability of endothelial cells' proliferative active can we inhibit the CNV.

CNV的发生发展是一个复杂的病理过程，其中，脉络膜毛细血管内皮细胞的异常增生为最关键的一环，因此只要能够抑制血管内皮细胞的增殖就有希望能够抑制CNV。

There were many apoptotic cells spreading through the short cloacal membrane in cloaca malformation rat embryos on gestational days 13.5. But from gestational days 14.5 to 15 cellular apoptosis did not occur in terminal rectum and"tail groove" in cloaca malformation rat embryos, rectum could not connect to the outside.

ETU致畸的胎鼠13.5天时，短小的泄殖腔膜布满大量凋亡的细胞。14.5天-15天直肠末端与相应的尾沟处未见细胞凋亡发生，直肠末端未与外界相通。

The expression profiles analysis of 25 genes belonging to 8 types in different development periods of Y35 somatic embry showed, genes involved in transcription, signal transduction, cell fate, substance transport, cell and development regulation were active at early and middle stages of somatic embryogenesis, while at the stage of cotyledonary embryo maturation, the high level-expressed genes were mainly those related to storage protein, maturation and defense.

通过半定量和Real-Time PCR技术，对WRKY和MAPKK等8类25个差异表达基因在Y35体细胞胚不同发育时期的表达分析显示，转录、信号转导、细胞生长分裂、细胞命运、物质转运和多数发育调节相关基因在体细胞胚胎发生的早期或中期比较活跃，而进入子叶胚成熟后期则主要是储藏蛋白、成熟和防御相关基因大量表达。

A dose-dependent inhibition of cGMP-PDE activity was observed when cUMP 10~(-6-10~(12) M was added to the culture medium, which may explain the increase of the level of intracellular cGMP, while the activity of cAMP...

浓度为10~(-6)-10~(-12)McUMP对胞内cAMP-PDE活性几乎没有影响，而抑制cGMP-PDE的活性，抑制作用随cUMP浓度降低而减小，这可能是胞内cGMP水平增高的原因。cUMP可能与细胞的cAMP PK结合，释放催化亚单位，细胞生长的抑制可由此发生。

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。