查询词典 biochemical

However, opioid receptors are not expressed naturally in great abundance, they are relatively labile and frequently difficult to solubilize as monomers. The availability of their cDNAs makes them good candidates for overexpression in heterologous cells, which offers hope for the purification of membrane receptors for biochemical and structural studies.

在生物体内，阿片受体的含量很低，分离纯化过程中受体蛋白不稳定、易形成多聚体。cDNAs的克隆成功使阿片受体的异源高效表达成为可能，为研究阿片受体蛋白的生化特性和结构特征创造了条件。

The inducible nitric oxide synthase is obviously expressed in speen of rats under the predator stress, suggesting important function for iNOS in speen physiology. However, the expression and subcellular localization for NOS in speen development and differentiation are largely unknown. In the present study, the changes in iNOS activity in spleen of rats under predator stress were studied to explore the role of iNOS in the decreased immunoactivity of the stressed rats. The changes in iNOS were observed with immunobistochemical method, and the contents of NOS and NO in spleen with biochemical method.

在捕食压力下，大鼠脾脏诱导型一氧化氮合酶明显表达，说明iNOS起到了重要的生理功能，然而，NOS的表达及在亚细胞水平的定位以及相应的差异变化等都很不明确，本试验采用捕食应激模型，利用免疫组织化学方法和生化测定，检测心理性应激对大鼠脾脏iNOS活性的影响及探讨这种影响与应激动物免疫力下降之间的关系。

A Bacteriocin-producing Lactic Acid Bacteria R260 strain was screened from plant-material. The morphological, physiological and biochemical features of R260 strain were as follows, the bacterial cell was gram-positive, straight rot-shaped, single or pairs and the spor wasn't found. VP reaction, nitrate reaction, gelatin liquefy and catalase reaction were negative. Glucose, fructose, sucrose and maltose were fermented to organic acids.

本实验从植物性材料中筛选到一株产细菌素的菌株 R260，菌株的形态观察和生理生化性质测定结果显示，菌体细胞呈杆状，单个或成对出现，革兰氏阳性，无芽孢；接触酶反应、硝酸盐还原实验、明胶液化实验、产氨实验、水解淀粉实验、硫化氢产生实验和 VP 实验均为阴性；发酵葡萄糖、蔗糖、麦芽糖、果糖和核糖。

It is suggested that mechanisms protecting epidermis of squamata species from UVB damage may involve in (1) Physical defensive mechanism: the death epidermal layer limited UVB transmitting to the viable cells;(2) Biochemical defensive mechanism: up-regulated CAT may protect skin from reactive oxygen species which may induced by UVB. Moreover, the lipid and proteins in the β-, meso- and α-layer may absorb incident UVB and formed damaged products that were limited in the original site;(3) Cellular defensive mechanism: quick initiating of proliferation of the germinal cells and forming of the new epidermis and shedding out the damaged epidermis shortened the damage process and restricted the damage area.

1物理性防御：角质层和中层阻挡绝大部分UVB透过，最大限度地减轻生发层的损伤；(2)生化性防御：通过上调CAT活性以减轻LVB诱导的活性氧对表皮的损伤，同时角质层蛋白质和中层脂类可吸收UVB，且形成的有害产物被局限于原位；(3)细胞性防御：通过迅速启动再生修复过程形成新的表皮，及时蜕去积累了脂类过氧化产物、受损蛋白质和晒斑细胞等的受损表皮，有效防止损伤的持续和蔓延。

The rule of growth and decline about main biochemical material (solubility protein, solubility sugar, SOD and gossypol IAA) contacting with stomatic embryogenesis showed that content of solubility protein and SOD activity was differed in the different period, being lower in earlier callus and reaching maximum in 120 day.

对陆地棉愈伤组织诱导及体细胞胚发生过程中的主要生化物质（可溶性蛋白含量、可溶性糖含量、SOD活性和IAA氧化酶活性）的测定表明，各个时期的可溶性蛋白含量、SOD活性是不同的，在愈伤组织形成初期较低，随着愈伤组织的生长及胚状体的形成，可溶性蛋白含量、SOD活性逐渐上升，在120d时达最大值；而可溶性糖含量在60d时有一个高峰值，在120d时达到最低值；IAA氧化酶活性在60d、120d时酶活较高，90d的酶活较低。

These include physical characteristics, such as repulsive forces resulting from the electronegative charge of both platelet and endothelial cell membranes, and biochemical attributes, such as the synthesis and release of inhibitors of platelet activation. Platelets respond rapidly to alterations of endothelial cells and to exposure of subendothelial structures by attaching firmly to the site of the lesion.

正常情况下，循环中的血小板与血管壁内皮细胞层紧密接触但不发生黏附，是因为血管内皮细胞具有一定的活性功能，包括一些物理特性如血小板和内皮细胞膜均带有负电荷产生相互排斥作用以及生化作用如合成和释放血小板活化抑制剂。

This study evaluated the physiological effects and biochemical characteristics of functional axial leaf and different position sympodial leaf as affected by applying different levels of nitrogen fertilizer(0 kg/ha Low N;189.50 kg/ha Middle N;395.0kg/ha High N) using Bt-transgenic hybrid cotton variety 33B.

通过3个氮素水平(低氮0 kg/hm2、中氮189.50 kg/hm2、高氮395.0 kg/hm2)处理，研究棉花主茎功能叶和不同部位果枝叶衰老过程中的生理生化变化特征。

While the physiological and biochemical function and other taxology methods were need to combined for the exist of some differences between them.

另外，在一些生理生化反应上，二者又有较大的差异，体现出了它与分子分类在内的其他分类方法相结合，以共同准确地确定粘细菌的真实分类地位的必要性。

There are some reports about G. maculatum mainly focus on its taxology, biogeography and the phylogeny of Glyptosternoid fishes. No reports on biochemical genetics of G. maculatum or other Glyptosternoid fishes were found.

关于黑斑原鮡的研究，多集中于分类、生物地理学及鰋鮡鱼类系统演化、进化等方面，目前为止，尚无黑斑原鮡群体或鰋鮡鱼类生化遗传方面的研究报道。

In the experimental study section, the rats were divided into four groups, including the normal control, the model, the Piracetam, the QPC, and copied to AD model. After the treatment, we observed the effects on the AD rats' ability of leaning and memorizing, detecting the TChE activity in whole blood and the expression levels of the related biochemical indicators of As includeing GFAP、NGF and BDNF of the AD rats' brain hippocampus, then compared the QPC with other groups to reveal the mechanism of action of the QPC treating AD to bright.

在动物实验部分，我们通过塑造AD动物模型，设立正常对照组、模型组、脑复康组和强脾益智胶囊组，观察强脾益智胶囊对AD模型大鼠空间学习记忆能力的影响，检测AD大鼠全血、海马匀浆液中乙酰胆碱酯酶活性和通过免疫组化的方法检测胶质纤维酸性蛋白、神经生长因子、和脑源性神经营养因子的表达情况来反映星形胶质细胞的增值情况，以期揭示强脾益智胶囊对AD的治疗作用机理。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。