等离子体聚合法制备膜蒸馏用疏水微孔复合膜

本文以八氟环丁烷为单体,采用等离子体聚合法将亲水性硝酸纤维素微孔膜改性,制得疏水硝酸纤维素微孔复合膜。所得疏水微孔复合膜可用于膜蒸馏,并具有优良的膜蒸馏性能,其通量达到反渗透水平。利用扫描电镜、X-射线显微分析和XPS等分析手段研究了聚合条件对所得复合膜结构性能的影响.     

接触角法研究氨丙基硅烷化石英表面

利用接触角法研究了氨丙基硅烷化石英表面的基团浓度及单分子层中单个分子的截面积。提出了氨丙基硅烷化的模型。     

Construction of Recombinant Modified Vaccinia Ankara （MVA） Expressing Hepatitis B Virus Surface Antigen

Introduction Despitetheexistenceofeffectiveprophylacticvac cinesagainstthehepatitisBvirus(HBV)formany years,HBVinfectionremainsaserioushealthproblem worldwide.Approximatetwobillionpeoplehavebeen infectedbyHBVanditisestimatedthatmorethan350millionofthemare…     

Purification and Primary Structure Determination of a Novel Polypeptide Isolated from Mistletoe Viscum coloratum

A novel polypeptide was isolated from mistletoe Viscum coloratum. The primarystructure of the polypeptide ‘named viscotoxin B2‘ was determined to be KSCCKNTTGRNIYNT CRFAGGSRERCAKLSGCKIISASTCPSDYPK by Edman degradation. Viscotoxin B2 shared highsequence homology with viscotoxins isolated from Viscum album. Pharmacological experimentsshowed that viscotoxin B2 had distinct cytotoxic activity on tumor cells. Viscotoxin B2 could beused as a leading compound in cancer therapy.     

Synthesis and Crystal Structure of Neodymium Complex[Nd (C_(18)H_(20)N_2O_4) (NO_3)_3]

1INTRODUCT1oNMeta1liccomplexesofsomeSchiffbaseshaveantiviraIandfungistaticac-tivies[1-3i.SomeSchiffbasemetalliccomplexeshavecatalyticactivityasenzyme"'.Thisaspectacu1arresearchfield-WehavereportedthesynthesisandcrystalstructureofNd(llI)nitratecomplexwithN,N-disalicyclideneethylenediamineandDMSO(si'HerethetitlecomplexwasobtainedandcharacterizedbyX-raydiffrac-tion'Theligandisdischiffbaseofcondensationfrom2-hydroxyl-3-methoxyben-zoaldehydeandethylenediamine.2EXPERIMENTAL2.1Synthesi…     

手性2-(口恶)唑烷酮的无溶剂合成法

在无溶剂条件下,手性的β-氨基醇和脲在160-180℃反应0．5-1 h,在200℃反应0．5 h,高产率地获得手性噁唑烷酮。     

（四甲基二硅撑）双（3－三甲硅基环戊二烯基）－四羰基二铁的反应性

标题化合物（Ｍｅ_２ＳｉＳｉＭｅ_２）［η￣５－（３－Ｍｅ_３ＳｉＣ_５Ｈ_３）Ｆｅ（ＣＯ）_２］_２／（μ－ＣＯ）_２（Ａ）分子中的Ｆｅ－Ｆｅ键被钠汞齐还原断裂，生成相应的双铁负离子，分别与ＭｅＣＯＣｌ、ＰｈＣＯＣｌ、ＰｈＣＨ_２Ｃｌ、ＣｌＣＨ_２ＣＯＯＣ_２Ｈ_５和Ｐｈ_３ＳｎＣｌ进行亲核取代反应，生成在铁原子上引入相应取代基的产物（Ｍｅ_２ＳｉＳｉＭｅ_２）［η￣５－（３－Ｍｅ_３ＳｉＣ_５Ｈ_３）Ｆｅ（ＣＯ）_２Ｒ］_２（Ｒ：ＭｅＣＯ（１），ＰｈＣＯ（２），ＰｈＣＨ_２（３），ＣＨ_２ＣＯＯＣ_２Ｈ_５（４），Ｐｈ_３Ｓｎ（５），Ｉ（６））。Ａ在氯仿中与碘反应，得到Ｆｅ－Ｆｅ断裂的双铁碘化物，但在苯中与过量碘反应，则得到Ｆｅ－Ｉ－Ｆｅ桥联的离子型化合物（Ｍｅ_２ＳｉＳｉＭｅ_２）［η￣５－（３－Ｍｅ_３ＳｉＣ_５Ｈ_３）Ｆｅ（ＣＯ）_２］_２Ｉ·Ｉ（７）。化合物６的晶体和分子结构经Ｘ射线衍射测定，６属单斜晶系，Ｐ２１／ｃ空间群，ａ＝１．７２１７（４）ｎｍ，ｂ＝０．７７５３（２）ｎｍ，Ｃ＝１．３６２９（７）ｎｍ，β＝１０３．８０（３）°，Ｖ＝１．７６７（２）ｎｍ３，Ｚ＝４，Ｄｃ＝１．６２９９·ｃｍ－１，最终偏差因子Ｒ＝０．０５４。     

基板界面对PS/PMMA溶液共混物溶剂挥发成膜相结构的影响

研究了PS PMMA的共混物溶液溶剂蒸发成膜时的基板界面效应 .利用扫描电子显微镜 (SEM)研究了PS PMMA(5 5 ) (W W) THF高分子共混物溶液在不同基板上通过溶剂挥发成膜的相形态结构 .通过FTIR及ATR FTIR检测了共混物薄膜及其表面的共混组成 .研究结果表明 ,成膜基板对高分子共混物溶液成膜后的相形态有很重要的影响 .控制共混物溶液体系成膜过程中的动力学因素 ,可以调控出所设想的各种复杂的相结构形态     

IgA肾病免疫吸附剂的研究(Ⅰ)

本文采用碳酰二咪唑（N，N'-Carbonyldiimidazole,CDI)为活化剂^[1]，活化琼脂糖载体，并以人免疫球蛋白G（IgG)，为配基制成的免疫吸附剂首次探讨了对高IgA肾病病人血清进行体外清除IgA的实验，吸附率为30－35％，具有一定的清除效果。     

Synthesis of β-（ 1→6）-Branched （ 1→3）-Glucononaoside with Alter-nate β- and α-Bonds in the Backbone

Lauryl glycoside of β-D-Glcp-(1→3)-[β-D-Glcp-(1→6)-]α-D-Glcp-(1→3)-β-D-Glcp-(1→3)-[β-D-Glcp-(1→6)-]α-D-Glcp-(1→3)-β-D-Glcp-(1→3)-[β-D-Glcp-(1→6)-]β-D-Glcp was synthesized through 3 3 3 strategy. 3-O-Allyl-2,4,6-tri-O-benzoyl-β-D-glucopyranosyl-(1→3)- -[2, 3, 4, 6-tetra-O-benzoyl-β-D-glucopyranosyl-(1→6)-] 1,2-O-isopropylidene-α-D-glucofuranose was used as the key intermediate which was converted to the corresponding trisaccharide donor and acceptor readily.