6.1 An Introduction to Enzymes 191 H20 in the presence of oxygen is a highly exergonic 6.2 How Enzymes Work 193 process, releasing free energy that we can use to think an I 6.3 Enzyme Kinetics as an Approach to Understanding main on the shelf for years without any obvious con-

A packet switch consists of a routing engine(table look-up), a switch scheduler, and a switch fabric. The routing engine looks-up the packet address in a routing table and determines which output port to send the packet. Packet is tagged with port number The switch uses the tag to send the packet to the proper output port Eytan Modiano

I. Teaching aims: 1) to learn the new words and expressions )to improve reading skills 3)to analyze the structure of the text II. Focus of teaching:

I Teaching aims: 1. to learn the new words and expressions; 2. to improve reading skills 3. to analyze the structure of the text II.Teaching focus: 1.key words:

I Teaching aims: 1. to learn the new words and expressions; 2. to improve reading skills 3. to analyze the structure of the text II.Teaching focus: 1.key words:

I Teaching aims: 1. to learn the new words and expressions; 2. to improve reading skills 3. to analyze the structure of the text II.Teaching focus: 1.key words:

Unit Three I Teaching aims: 1. to learn the new words and expressions; 2. to improve reading skills 3. to analyze the structure of the text II.Teaching focus: 1.key words:

Unit Two Teaching aims: 1. to learn the new words and expressions; 2. to improve reading skills 3. to analyze the structure of the text II.Teaching focus: 1.key words:

1. to learn the new words and expressions; 2. to improve reading skills 3. to analyze the structure of the text II.Teaching focus: 1.key words:

Working on a vacuum manifold: See LLP chapter 9.2 for an excellent discussion on working with air-sensitive reagents, including how to use a two-way manifold. De-gassing solvents: The best way to remove water and oxygen from a solvent is to distill it over an appropriate drying agent (such as sodium). This can sometimes be a lengthy (and dangerous)task. Since we