5 points/problem(20 points total) 1. Two hydrogels are prepared from two different candidate polymers for controlled release of a protein drug, interleukin-2(IL-2). The gels exhibit the same swelling ratio at equilibrium, but jel a (formed by cross-linked polymer A, repeat unit molecular weight Mo= 100 g/mole)has a molecular weight between cross-links of 3,000 g/mole, while gel B (formed from cross linked polymer B, Mo=95 g/mole) has a molecular weight between crosslinks of

一、解释下列名词(共40分,每题4分) 1、激光共焦点扫描显微镜(laser scanning confocal microscopy) 2、功能基因组学(functional genomics) 3、胶原(collagen) 4、G蛋白偶联受体( protein-linked- receptor)

3定积分的性质 性质1(线性性质)若(x),g(x)均在a的上可积,则g(x)+角()也在[a,列上可积,且[af (x)+Bg(x)]dx=a f(x)dx+8 g(x)dx

一、选择题 1.反应H2(g)+Br2(g)2HBr(g)的K=1.86.若将3molH2,4 mol Br22和5molHBr放在10dm3烧瓶中,则…() (A)反应将向生成更多的HBr方向进行 (B)反应向消耗H2的方向进行 (C)反应已经达到平衡 (D)反应向生成更多Br2的方向进行

1 An introduction to biotechnological innovations Industry G. Mijnbeek and C. K. Leach 2 Biocatalyst in organic chemical synthesis R O. Jenkins 3 Efficiency of growth and product formation R.O. Jenkins

采用碱性氢化物体系发生原子吸收方法测定了钢铁中的微量铅.选择铁氰化钾-酒石酸钠为氢化物发生的氧化剂和配位剂,还原剂硼氢化钾的质量浓度为1g,L,测定液中氢氧化钠的质量浓度为3.6g/L,用12.5g/L的草酸酸化,方法特征浓度为0.073ng/mL,检出限为0.20ng/mL.此体系允许2.5 mL测定液中含铁、钴、镍的量为30,3,3 mg,可以满足直接测定钢铁中的微量铅的需要.通过对含铅0.002%(质量分数)的样品测定实验,得到了满意的结果

1.H2S和CO2组成的气体混合物中,H2S的摩尔分数为0.513。将 1750cm3(在21℃,101.325kPa下测得的)混合气体通入350℃的管 式炉,然后迅速冷却。使流出来的气体通过盛有无水氯化钙的管子,结 果管子的质量增加了34.7mg。试求350℃时反应 HS(g)+CO, (g)=COS(8)+H,o(g) 的标准平衡常数。设气体服从理想气体状态方程

MIT OCW DATA COMMUNICATION CONTENTS Lectures 2 The Data Link Layer: Framing and Error Detection Lectures 3 4 The Data link layer: arQ Protocols Lectures 5 6 Introduction to Queueing Theory Lectures 8&9 M/G/I Queues

索引 阶梯”地形( Terrace) 贝叶斯判别分析 3S ( GIS.RS GPS 被动遥感( Passive Remote sensing) 9交模型(g- Intersection Model,9-IM)

TEXT Munson, B R, Young, D F and kishi, T H, Fundamentals of Fluid Mechanics, 4th edition, John Wiley son, 2002 REFERENCES Shames IH. Mechanics of Fluids. 3rd Edition