The nucleic acids, deoxyribonucleic (DNA) and ribonucleic (RNA) , are, respectively , the molecules that preserve here￾ditary information and that transcribe and translate it in a way that allows the synthesis of all the varied proteins of the cell 25.2 NUCLEOTIDES AND NUCLEOSIDES

Compounds having two carbonyl groups separated by an intervening carbon are called β-dicarbonyl compunds, and these compounds are highly versatile reagents for organic synthesis

This journal is © The Royal Society of Chemistry 2000 Recent developments in indole ring synthesis—methodology and applications Gordon W. Gribble Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA

Scopes of Solid State Synthesis Solids: crystals, fibers, films, foams, ceramics, powders, nanoparticles, morphology Direct reaction Crystallization: solution, melt, glass, sol-gel

一、有机合成的历史回顾 二、有机合成化学的发展趋势 三、学习内容和方法 四、重要参考书及期刊 五、课程安排 Chapter 2 Formation of Carbon-Carbon Single Bonds Chapter 3 Formation of Carbon-Carbon Doule Bonds Chapter 4 Conversion of Functional Groups Chapter 5 Application of Organometallic Reagents in Organic Synthesis Chapter 6 Diels-Alder Reaction and Development Chapter 7 Oxidation Reactions Chapter 8 Reduction Reactions

FATTY CHANGE Excessive entry of free fatty acids into the liver (starvation, corticosteroid therapy). Enhanced fatty acid synthesis. Decreased fatty acid oxidation. Increased esterification of fatty acid to triglycerides (alcohol). Decreased apoprotein synthesis (CCl). Impaired lipoprotein secretion from the liver (alcohol)

Lecture 2: Molecular Design and Synthesis of Biomaterials I: Biodegradable Solid Polymeric Materials(continued) hemistry and physical chemistry of degrading polymeric solids for biomaterials Today Theory of polymer erosion Enzymatic degradation of synthetic biomaterials Designing degradable materials Reading

1. Reduction(fixation)of N, into ammonia(NH3 or NH*) 2. Synthesis of the 20 amino acids 3. Synthesis of other biomolecules from amino acids 4. The de novo pathways for purine and pyrimidinebiosynthesis 5. The salvage pathways for purine and pyrimidine reuse

HEAT EXCHANGER NETWORK SYNTHESIS 1: TARGETING OBJECTIVES: 1 Determine the minimum energy inputs required for a process 2Determine the minimum number of heat exchangers required to transfer this energy 3Develop a methodology for determining where these heat exchangers should be placed in the process

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