第一节抗原概述 一、概念 1.抗原(antigen,Ag)是一类能刺激机体免疫系统诱导免疫应答、并能与应答产物(抗体和致敏淋巴细胞)发生特异性反应的物质

19世纪末,发现在新鲜免疫血清中加入相应细菌而不溶解,若将此血清 加热到56℃30分钟,则只能使细菌凝集而不溶解,再加入新鲜正常血清,细 菌又被溶解。据此证明新鲜免疫血清中有两种成分,一种是特异性抗体,另 一种是补体

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一、计算机系统 二、存储器 三、中央处理机 四、外部设备

8.1差错控制编码的基本概念 8.1.1差错控制方式 图8-1差错控制系统

Gordon mckinzie Manager, New Aircraft Development United airlines I joined United Airlines in 1967 and am presently Manager of New Aircraft Development, a post I have held since 1987. Assignments at United have included

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