§1 金属表面几何形状 §2支承面积曲线 §3金属的表面结构 §4表面能与表面张力 §5金属表面的化学性质 §6金属表层的组成

1定义: 由于机械作用间或伴有化学或电的作用,物体工件表面材料在相对运动中不断损耗的现象。 2说明: (1)磨损不仅局限于机械作用 (2)强调磨损是相对运动中产生的现象。 (3)磨损发生在物体工作表面材料上。 (4)磨损是不断损失或破坏的现象

危险化学品安全知识讲座

北京宏剑科迅计算机技术中心：常用化学软件新版本简介

True: Growing and dividing cells need to use substrate to provide energy and materials for growth, maintenance and product formation. In immobilised (non-growing) systems the energy and materials are only required for cell maintenance and product formation

Linacre House, Jordan Hill, Oxford OX2 SDP a division of reed Educational an Q Amember of the Reed Elsevier plc group OXFORD BOSTON JOHANNESBURG MELBOURNE NEW DELHI SINGAPORE Reed Educational and Professional Publishing Ltd 1997 medium by electronic means and whether or ot transiently or incidentally to some other use of this

8. 1 Introduction 8.2 Essential and nonessential amino acid Stereochemistry of amino acids 8. 4 Amino acid fermentation 8.5 Recovery of the amino acid from the fermentation broth

6.1 An introduction to antibiotics 6. 2 General strategies for the production of antibiotics 6.3 a brief history of penicillin production 6.4 Antibacterial mode of action of B-lactam antibiotics

4.1 Introduction 4.2 Conventional protein sources 4.3 Single cell protein 4.4 Substrates for SCP production 4.5 Micro-organisms for SCP production

Biocatalysts in organic chemical synthesis 2.1 Introduction 2.2 Micro-organisms as catalysts of organic synthesis 2.3 Enzyme preparations versus whole cell processes 2.4 Scale of production 2.5 Modes of operation of bioprocesses 2.6 Biotechnological processes verses chemical synthetic processes