生物化学

Traditional phenotype classification,chemotaxonology and other ordinary bacteria taxonology were used to study the antagonistic bacterium preserved by the agricultural antibiotic laboratory of Chengdu Institute of Biology, Chinese Academy of Sciences.Its morphological,cultural physiological,biochemical characteristics and chemotaxonomy were studied.The antagonistic bacterium is bacilliform,and its cell diameter is less than 1 micron;it is Gram positive;it.can form spore.

采用传统的表型分类、化学分类等一般细菌常用鉴定方法，对中科院成都生物所农抗组实验室保存的一株小麦赤霉菌拮抗菌株进行形态特征、培养特征、生理生化特征等水平的鉴定，该细菌的细胞呈杆状，细胞直径小于1微米，革兰氏染色阳性，能形成芽孢，属于芽孢杆菌属。

It shows in clinic as tooth sensitivity, pulpitis,periodontitis,food impaction ,deformation of basifacial caused of loss of occlusal height, temporomandibular disorder syndrome, etc. The wear property of artificial tooth material will lead a direct effect to restoration result, when it exists in oral environment. It will cause tooth enamel loss too much in a very short period, if the wear property of artificial tooth superior to tooth enamel; but if it is inferior to tooth enamel, serious wear will occur on restoration occlusions, which will lead to loss of bite functions and even decrease of occlusal vertical dimension, disorder of bite functions, etc. Therefore, it is important to artificialtooth material not only it"s biotic compatibility, mechanical function, chemistry property but also it"s wear property.

当口腔中存在修复体时，人工牙材料的磨耗性能也直接影响临床修复的效果，当其磨耗性能强于天然牙釉质门时，将会引起天然牙釉质过度磨耗；当其磨耗性低于天然牙釉质时，又会在较短时期内引起修复体咬合面磨损过度，失去咬合功能，严重者甚至出现咬合垂直距离降低，咬合功能紊乱等症状因此，对于人工牙材料除了考虑生物相容性、机械性能及化学性能外，还应考虑到材料的磨耗性能，而磨耗率的测定一直是评价天然牙及人工牙磨耗性能的优越指标之一。

The paper describes the benthic environmental features of China Registered Pioneer Areafrom physical,biological and chemical oceanography.

阐述了中国多金属结核开辟区深海环境的水文、生物和化学特征。

Based on the analysis of the existing pollution status of urban river s, the remediation technology including physical, chemical and bioecological technology were introduced, with analysis of their advantage, disadvantage and applicability.

在分析城市河道水体污染现状和污染源的基础上，介绍了物理、化学、生物生态等城市河道水质恢复技术，分析了不同技术的优缺点及适用性，并预测了城市河道水体恢复技术的发展趋势。

Based on the analysis of the existing pollution status of urban rivers, the remediation technology including physical, chemical and bioecological technology were introduced, with analysis of their advantage, disadvantage and applicability.

在分析城市河道水体污染现状和污染源的基础上，介绍了物理、化学、生物生态等城市河道水质恢复技术，分析了不同技术的优缺点及适用性，并预测了城市河道水体恢复技术的发展趋势。

From the author＇ s point of view, there are four feasible measures to improve the situation of salinization in Heihe River irrigated area, namely agricultural technical measures, water conservancy projects, biogeographical improvement and chemical improvement.

黑河灌区修复改良盐碱土的可行性措施大致可归纳为4个方面。即农业技术措施、水利工程措施、生物改良措施及化学改良措施。

In the past few years, chemistry has occupied a solid position in the study of biologic phenomena.

在过去几年中，化学在生物现象研究中占据稳固的地位。

Bioluminescent creatures use chemicals to make their ownlight.

具有发光能力的生物是利用化学物质发光的。

In bioreaction engineering teaching,we put emphasis on theoretical treatment,stressing the creation and cultivation of scientific mode of thinking.The study enthusiasm and desire to participate of students were improved by using interactive teaching.Some numerical methods were supplemented to eliminate the fear of students to some complicated mathematical problems.

生化反应工程是生物工程专业的主干课，是以生化反应动力学为基础，综合运用传递过程原理、设备工程学、过程动态学及最优化原理等化学工程学的方法，进行生化反应过程的工程分析与开发，以及生化反应器设计、放大、操作和控制的一门学科[。1]因此，生化反应工程是化学反应工程的一个分支，是当前反应工程研究的前沿领域。

Chemical analysis and toxic tests were combined with benthic macro invertebrates community structure alternations. Based on tri-axial graphs together with relevant matrix of decision-making, the initial bio-responsive sediment quality criteria clearly indicated the situation of heavy metal pollution, and showed the dose-response relationships between heavy metal contamination and benthic biotics. Moreover, the SQC may provide some basic material for establishment of sediment quality standards and for follow-up remediation engineering in the area.

通过将化学分析、毒性鉴定和底栖群落结构变化三基元集成为一体的三轴图和相应的响应信息判断矩阵，基于现场生物响应的沉积物质量基准能较为清晰地指示乐安江流域表层沉积物中重金属污染的相对程度和分布模式，体现底栖生物对沉积物重金属污染的剂量-响应关系，为进一步制订该区域沉积质量管理标准、开展后续的污染治理与恢复工程提供技术保证和科学依据

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。