合成因子

The species of extracellular ATP can participate the effect of nerve system not only as the neurotransmitter and modulator but also has a trophic action to glial cell and neuron. It participates in many courses, e.g. cell differentiation and apoptosis, the morphologic change of chondriosome, to stimulate the synthesis and release of cytokine and nerve growth factor. It has a great influence to neurological growth and plasticity.

细胞外ATP类物质不仅可以作为神经递质及调质参与神经系统的功能，还可对胶质细胞及神经元产生营养作用，广泛参与细胞分化及凋亡、细胞线粒体形态变化、刺激细胞因子及神经生长因子的合成及释放等过程，对神经系统的发育及可塑性变化产生重要的影响。

Animal growth is the course of cell division and protein synthesis, it is regulated by endocrine growth axis of brain, animal growth fast or slow is depended on concentration equilibrium of growth hormone and Somatostatin in blood.

动物生长发育是细胞分裂与蛋白质合成的结果，它由脑垂体神经内分泌生长轴所控制，动物生长速度的快慢最终是生长因子与生长抑制因子平衡的结果。

Methods Gelators of N-lauroyl-l-alanine methyl esterand N-lauroyl-l-alanine ethyl esterwere synthesized with l-alanine methyl ester,l-alanine ethyl ester and lauroyl chloride as materials.

方法以l-丙氨酸甲酯盐酸盐、l-丙氨酸乙酯盐酸盐和月桂酰氯为原料，合成月桂酰-丙氨酸甲酯凝胶因子及月桂酰-丙氨酸乙酯凝胶因子，采用IR、1H-NMR、MS对其结构进行表征，并对其熔点、热稳定性、在各种植物油中的最小胶凝质量浓度、相转变温度等基本性质进行了研究。

They were named respectively as muramidase-released protein; succinate dehydrogenase/fumarate reductase flavoprotein subunit (SDHFp/FRDFP, extracellular); bacterial trigger factor; elongation factor G (EF-G, extracellular); PTS system sorbose subfamily I (PTS/MAN-ⅡAB, cytoplasmic); pyruvate kinase; phosphofructokinase, PK.

经MALDI-TOF-MS鉴定，这8个蛋白分别为溶菌酶释放蛋白、琥珀脱氢酶／延胡索酸还原酶黄素蛋白亚单位(SDHFp/FRDFp)、触发因子、延长因子G、细菌糖磷酸转移酶系统甘露糖特异ⅡAB亚单位、丙酮酸激酶、6-磷酸果糖激酶(6-PFK)、色氨酸－tRNA合成酶。

The expression of gibberellin biosynthesis genes are regulated by several endogenous and environmental factors , inc...

GA生物合成相关基因的表达受到多种内源和外源因子的调控，其中研究较多的是发育阶段、激素水平和光信号等内源及环境因子的调控。

The former, intracranially complements patients some factors, most frequently with TH gene to compensate scanty of intrastriatal DA and improve the symptoms of the patients, while have little resistance to the progressive degeneration of dopaminergic neurons; The latter provide variety of neurotrophic factors, most specific being the glial cell-line derived neurotrophic factor , to protect the residual DA neurons in the nigrostriatal system from further pathogenic injuries, while have little benefit to those DA neurons with irreversible damage, and them cannot offset the already-existing symptoms.

前者是给宿主脑内补充某些因子，主要是DA合成过程中的限速酶TH基因，以补充纹状体内DA含量的不足，减轻患者的症状，但对DA能神经元的进行性退变没有治疗效果；后者则是提供各种神经营养因子其中最具特异性的为GDNF，以保护黑质一纹状体系统内剩余的DA能经元免受病因的继续损害但对已发生不可逆性损害的DA能神经元并无拯救作用，无法消除已出现的症状。

Administration of NGF may treat the spinal cord and periphery nerve injured and improve the function of damage nerve.

神经生长因子是最先发现和被证实的细胞生长调节因子，NGF在神经细胞的增殖，分裂和轴突的生长、递质的合成及细胞的凋亡等阶段均起着重要作用，NGF对中枢和周围神经的损伤均有保护和促进恢复的作用，尤其是NGF促进神经细胞的再生，给予NGF可减轻和改善对神经元的损害和治疗外伤引起的脊髓和周围神经损伤。

Brain-derived neurotrophic factor is the most abundant neurotrophin in many parts of brain, such as pallium, hippocampus and so on.

脑源性神经营养因子(brain-derived neurotrophic factor，BDNF)作为脑组织中含量最丰富的神经营养因子，在中枢神经系统内合成并广泛存在于脑组织，包括大脑皮层、海马、基底前脑、纹状体、下丘脑和小脑，其中以海马和皮层中含量最高。

Using the chemical reaction route selection method proposed by the authors, a reaction route of using commercial methylglyoxal as the starting material to produce Furaneol was chosen.

今采用作者提出的化学反应路径选择因子对呋喃酮的合成方法进行计算比较，确定了以丙酮醛为原料，通过偶联反应合成中间体苏式3，4-二羟基-2，5-己二酮，再由成环反应制备产物呋喃酮的合成路线。

Huang-hua' pear fruit was a typical climacteric fruit after harvest, and the fruit senescence-related factors, such as LOX activity, 02" content, AOS activity, ACC synthase activity, ACC content, ACC oxidase activity and ethylene production, changed with peaks at 20 "C. The activities of LOX, AOS, ACC synthase, ACC oxidase and the accumulation of O2 ", ACC content and ethylene synthesis were inhibited when stored at 1癈. And the severity of flesh floss and fruit decay was lightened. Low temperature combined with polyethylene film bag packing (PEF1 and PEF2) could further decrease the rate of weight loss, flesh floss, and fruit decay and keep preferable freshness. When PEF1 and PEF2 packing fruits were transferred to shelf life at 20 "C after storage at 1癈. The activities of LOX, AOS, ACC synthase, ACC oxidase could be suppressed and the accumulation of 02 , ACC content and ethylene production were slowed down to a certain extent, especially during the shelf life after 60 d storage. PEF1 and PEF2 packing fruit could maintain higher firmness as well, and the effects became more distinct along with the storage period, there existed no significant difference between PEF1 and PEF2 treatments.

试验结果表明，在20℃下，LOX活性、O2-水平、AOS活性、ACC合成酶活性、ACC含量、ACC氧化酶活性及乙烯的生成，均呈峰形变化；1℃处理可抑制LOX、AOS、ACC合成酶、ACC氧化酶的活性和O2-、ACC的积累，抑制贮藏果实的乙烯合成，减轻果肉发绵和果实腐烂。1℃下贮藏的果实，若结合不同聚乙烯薄膜袋(PEF1和PEF2)小包装，可以进一步降低果肉发绵率和果实腐烂率，保持果实新鲜度；当果实经过一段时间贮藏后，转移到20℃下，在货架期间，PEF1和PEF2对果实成熟衰老各个相关因子均有不同程度的抑制效应，主要表现在贮藏60d后的货架期间，同时维持较高的果实硬度，对硬度的影响随着贮藏时间的延长愈加明显，PEF1和PEF2处理效果之间无显著差异。

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