8.3全微分及其应用 一、全微分的定义 二、全微分在近似计算中的应用

连通性 如果点集E内任何两点都可用折线连结起来,且该折线上 的点都属于E,则称E为连通集

Lipids are a class of nonpolar molecules that include the fats, cholesterol, fatty acids, lipid-soluble vitamins, waxes, soaps, glycerophospholipids, sphingolipids, and others. Lipids are found in the membranes of cells, the endoplasmic reticulum and in specialized fat storage cells called adipocytes. Example of lipids

Recombinant DNA technology 1 Restriction enzymes Nucleic acid hybridization DNA cloning 4 Viruses 5 DNA sequencing 6 Polymerase chain reaction

H protein synthesis H1 The genetic code H2 Protein synthesis(translation) in prokaryotes H3 Translation in eukaryotes H4 Protein targeting H5 Protein glycosylation

Section M Nitrogen Metabolism M1. Nitrogen Fixation and Assimilation M2. Amino acid metabolism M3. The urea cycle M4. Hemes and chlorophylls

Section L Respiration and Energy L1. Citric acid cycle L2. Electron transport and oxidative hosphory lation L3. Photosynthesis

Section K Lipid metabolism K1. Structures and roles of fatty acids K2 Fatty acid breakdown K3. Fatty acid synthesis K4 Metabolism of triacylglycerols K5. Cholesterol metabolism K6 Lipoproteins

8.2偏导数 一、偏导数的定义及其计算法 二、高阶偏导数

讨论 xy x2 函数f(x,y)={x2+y2x2+y2≠0 在点(0,0)有无极限?