反应素

PS alkali lignin sulfonate is a new type of surfactant, which is extracted and purified from waste liquid of paper-making by adding phenol and aldehyde and sulphuric acid at high temperature.

PS碱木素磺酸盐是由造纸废液经浓缩加入酚、醛和硫酸等在高温下复配或反应后提炼出的 1种新型表面活性剂。

Objective To investigate the immunosuppressive effect and related mechanism of Qinghaosu.

目的 探讨天然植物提取物青蒿素对小鼠迟发型超敏反应(delayed-type hypersensitivity response，DTH)的免疫抑制作用及可能的作用机制。

The topics in this lab course include the following areas: Microscope and cell morphology, Cell Physiology, Enzymes, Mitosis and meiosis, Cellular respiration, Photosynthesis, Mendelian genetics, Prokaryotes, Protists, Fungi and lower Plants.

本学期课程包含显微镜介绍、各种动、植物细胞形态及构造、细胞生理现象、酵素反应、细胞有丝及减数分裂、遗传性状、细胞呼吸作用、光合作用、原核生物形态、原生生物形态、真菌形态及苔藓植物形态。

Attraction is born out of a brain's reaction to certain pheromones.

人们相互吸引是因为大脑对某些特定的信息素作出反应。

Some species can detect and respond to pheromone concentrations of as little as one part in a trillion the ''.

有些物种可以发觉含量只有万亿分之一那么少的信息素并作出反应——''。

In what is, admittedly, the least-tested part of their thesis, Dr Unger and Dr Scherer argue that other cells react to this increase in leptin concentration by becoming resistant to the hormone's effects. That, in turn, stops them oxidising lipids and opens those cells to lipids' toxic effects.

昂格尔和谢勒博士的理论中有一部分证据最为不充分，在这一部分中，他们称其他细胞会对瘦素的累积产生反应，开始对激素的作用产生抵抗，从而不再对脂质进行氧化，是它们受到脂质毒性的攻击。

Cytochrome P450s are heme-containing mixed-function oxidases,involving in lots of biochemical reactions.They play an important role in preventing plants from pathogen and insect attacks and environmental stress.

细胞色素P450是一类含血红素的氧化还原酶类，它参与多种生化反应，在防御生物免受病虫害及逆境胁迫等方面具有重要作用。

Exposure to genistein, an estrogen, before puberty causes mammary gland differentiation.

青春期前服用雌激素染料木素可导致乳腺分化，&分化的细胞很少增殖，因而很少发生癌变；然而，如果已经患有雌激素反应肿瘤的动物服用雌激素，则刺激肿瘤的生长。&

The results shows that the flow characteristics of SiC-AlN granulated powder is obviously promoted after spray drying and a suitable particles grade match. With the increasing of pressure, the density of green body increases by the style of ladder at the pressure range of 4080 MPa, 80160 MPa and 160220 MPa, the green body is uniform and densification without hard pelleted particles above 160 MPa. The pressureless sintering SiC-AlN multiphase ceramic possesses superior sintering properties and mechanical properties. It is due to the rampart formation of AlN to SiC grain growth and the reaction of SiC and AlN to form 2H solid solution. It results in the grain fining, crack expansion producing bypass and deflection, fracture section producing tearing-open and pulling-out effects, which cooperatively improves the strength and fracture toughness of the multiphase ceramics.

结果表明：喷雾造粒后，复合粉体的流动特性显著提高，粒度级配合理；随着压强增加，坯体密度在40~80、80~160和160~220 MPa范围内呈现阶梯式增长，160 MPa以上成形后素坯均匀致密，无硬球颗粒存在；无压烧结SiC-AlN复相陶瓷具有优越的烧结性能和力学性能，这是由于AlN对SiC晶粒形成生长势垒，并反应生成2H型固溶体，从而细化晶粒，导致裂纹扩展产生了绕道与偏转效应，呈现晶粒撕裂与拨出现象，协同改善了复相陶瓷的强度及断裂韧性。

An improved ant colony algorithm on the basis of ant colony system to solve the traveling agent problem is presented.Ants secrete multi-pheromones to reflect the change of host's service ability and network load dynamically with the results that agent's migration is more agile.

在蚁群算法的基础上，提出分泌多种信息素的改进蚁群算法来求解旅行Agent问题，动态反应了节点服务能力和网络负载的变化，使迁移更具有灵活性。

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。