壳聚糖-聚羟基丁酸酯共混膜的制备与性质

以乙酸为共溶剂,制备了壳聚糖-聚羟基丁酸酯(CTS-PHB)共混膜,利用红外光谱(FT-IR)、广角X粉末衍射(WAXD)、扫描电镜(SEM)及差热分析(DTA)表征了共混膜的化学组成、晶形、形貌和热稳定性能。研究表明:CTS和PHB可在体积百分数为62.5%的乙酸溶液中共混,形成表面光滑、不透明的膜,干态共混膜具备一定的力学强度。各比例的CTS-PHB共混膜有相同的热分解温度,共混膜的形貌特征随两组分质量配比变化,其中mPHB/mCTS=1/1的共混膜显示出良好的有序结构。     

Preparation of Polyclonal Antibodies Against Testis-specific Protease 50 and Characterization of Antibody Specificity

Introduction TheTSP50genehasbeenidentifiedasoneofthe testis specificoncogenes,whichisexpressedathigh levelsinapproximately92%ofhumanbreastcancer samples,makingitanattractivemolecularmarkerand apotentialtargetfordiagnosisandtherapy[1].Itisho mologoustomany…     

溶胶－凝胶法制备Na_5YSi_4O_（12）及其离子导电性质

用溶胶－凝胶方法制备了钠快离子导体Ｎａ_５ＹＳｉ_４Ｏ_（１２）（简称ＮＹＳ）的纯相，应用交流阻抗谱技术测定了样品的离子电导和离子导电活化能，用扫描电子显微镜对用不同方法制备的样品烧结体表面进行了观察。与传统固相反应法制备的ＮＹＳ离子导体相比，用溶胶－凝胶方法制备的ＮＹＳ烧结体具有较好的界面效应。     

一种新型侧链液晶聚合物的喇曼光谱研究

The Raman scattering on a novel liquid crystal side chain polymer, poly-2,5-bis (p-meth-oxybenzoyloxy) styrene, has been performed. We observed that the characteristic Raman sp-ctra of the vinyl group in the monomer changed much deeply in the polymer, especially for the Raman line correponding to the C=C of the vinyl group which disappeared completly in the polymer. Contrast with that, the Raman spetra of the rest group did not present any substantial difference between the monomer and the polymer. These experimental facts show-ed that the vinyl group of the monomer was tranfered to the polymeric backbone while the chemical structure of the mesogenic unit in the monomer remained after the polymerization,and also conformed that it was successful in the synthesis of a liquid crystal side chain plymer without a flexible spacer between the mesomorphic unit and the molecular main chain.     

固相微萃取-气相色谱-质谱联用测定水中酚类化合物

建立了固相微萃取与气相色谱－质谱联用技术（SPME－GC－MS）测定水中酚类化合物的新方法，探讨了萃取时间、搅拌速度、离子强度、pH值和解吸时间等条件对萃取量的影响。结果表明：65μm PDMS/DVB涂层对水中的酚类化合物有较好的萃取效果，用于水中酚类化合物的测定，结果满意。     

3-羟基-6-O-甲基红霉素的合成优化与副产物的分析

分别以甲醇和水为溶剂,探讨了克拉霉素脱克拉定糖反应的主要产物,结果发现:以甲醇为溶剂得到的不是3-羟基-6-O-甲基红霉素,而是3-羟基-8,9,10,11-二脱水-9,12-半缩酮-6-O-甲基红霉素.以水为溶剂得到了3-羟基-6-O-甲基红霉素,收率94.7%.     

双核钴配合物(ROCH2C≡CCH2OR)Co2(CO)6的合成

Co_2(CO)_3中两个桥连的羰基很容易被一个炔键取代,生成羰基配合物(ROCH_2C)_2Co_2(CO)_6。此类配合物既可以催化炔烃三聚成苯,也可以作为炔烃的保护基团,还可以用它进行其它的合成。为此,我们用下述反应合成了这类配合物:     

Mn位掺杂钙钛矿结构化合物LaSr2Mn2-xNixO7的磁性和电性的研究

The effect of Ni substitution for Mn on magnetic and transport properties has been investigated for layered manganese oxides LaSr₂Mn_2-xNi_xO₇. Nickel doping hampered the canted antiferromagnetic (AFM) exchange at low temperature and their Neel temperature (T_N) decreased from 138 K (x=0) to 102 K (x=0.3). Meanwhile, spin glass, charge ordering and metal-insulator transition are suppressed by Ni addition. The resistivity increases obviously with increasing x due to double exchange interaction channel broken by Ni²⁺ addition. The resistivity of all samples in low temperature range fits to the Mott′s variable rang hopping (VRH) model, while it fits to nearest neighbor hopping of small polarons model in high temperature range.     

Solid state reactions of nitrogenous heterocyclic compounds(Ⅰ)——Solid state reactions of 3-methyl-l-phenyl-5-pyrazolone with carbonyl compounds

The solid state reaction of 3-methyl-1-phenyl-5-pyrazolone (MPP) with aromatic aldehydes and ke-tones benzil derivatives and imides,and the solid state Michael addition reaction of MPP with 4-arylidene-3-methyl-1-phenyl-5-pyrnzolone 2 were investigated.Some new solid state reactions between the reactants were found,from which a series of new compounds were obtained The structures of the products were identified by IR,1H NMR,MS,elemental analyses and also by X-ray crystal analysis,and the reaction mechanism of MPP with aromatic aldehydes and ketones was proposed     

分子筛修饰电极的研究（Ⅰ）──氢醌／醌电对在分子筛修饰电极上的电化学行为

考察了中性分子电对Ｈ_２Ｑ／Ｑ在１３Ｘ型分子筛修饰电极上的电化学行为。发现Ｈ_２Ｑ／Ｑ电对在修饰电极上电响应迅速，为双电子可逆反应，不受溶液温度及电极与溶液相对运动的影响，而与溶液的ｐＨ值有关。当ｐＨ≤２．０时，修饰电极对Ｈ_２Ｑ／Ｑ电对的氧化／还原有明显的催化作用．