僵蚕抗凝活性及其成分的分析

目的对僵蚕不同部位抗凝活性及其主要成分的含量进行测定 ,为僵蚕的质量控制和用药提供依据。方法用凝血酶时间 (TT)和经典化学方法为指标测定生、制僵蚕以及制僵蚕的不同部位的抗凝血活性大小以及总氮、铵态氮、蛋白质和草酸铵的含量。结果制僵蚕的抗凝活性、蛋白质和草酸铵含量均大于生僵蚕。制僵蚕不同部位凝血酶时间和蛋白质含量比较 ,其顺序是 :透明胶状物 >全药 >僵蚕皮 >绿褐色物。结论生、制僵蚕以及僵蚕不同部位抗凝活性和蛋白质等成分含量不一致 ,建议根据用药目的选择生、制僵蚕 ,作为抗凝药物应用时 ,可选择制僵蚕或其某一个或几个部位     

硫酸铁铵催化合成乙酰乙酸乙酯乙二醇缩酮

采用正交试验优选出最佳条件为：当乙酰乙酸乙酯为0.2moL时，硫酸铁铵0.7g，环乙烷10mL。乙酰乙酸乙酯和惭二醇摩尔比为1：1.5，反应时间为5h。所得产率为59.2%。     

Influence of Chemical Oxygen Demand Concentrations on Anaerobic Ammonium Oxidation by Granular Sludge From EGSB Reactor

INTRODUCTION The phenomenon of anaerobic ammonium oxidation was originally discovered in a denitrifying fluidized-bed reactor treating effluent from a methanogenic reactor in the 1990s[1]. Anaerobic ammonium oxidation (ANAMMOX) process is a strictly anaerobic denitrification process, in which ANAMMOX autotrophic bacteria directly oxidize ammonium to dinitrogen gas using nitrite as electron acceptor. In recent years, the anammox process has received great attention and lots of researc…     

Probing the regioselective C‐deuteriation of lithium enolates derived from 2‐methyl‐tetralone in the presence of substituted tertiary amines

Results are reported on the regioselective C‐deuteriation of 2‐methyl‐tetralone using a series of D‐sources and tertiary amines as potential mediators. The results presented further aid the understanding of kinetic deuteriation of both ‘base‐containing’ and ‘base‐free’ enolates. Copyright © 2006 John Wiley & Sons, Ltd.     

母婴ABO血型不合母体高效价IgG的低温分离与纯化

目的 分离和纯化母婴血型不合母体的特异性高效价的IgG抗体。方法 采用半饱和硫酸铵低温沉淀法分离IgG抗体，SephedexA50层析柱纯化，然后用B型红细胞(RBC)吸收放散IgG，用聚乙二醇(PEG)沉淀，真空泵脱水回收IgO。结果 200ml血浆经半饱和硫酸铵低温沉淀后得IgG粗制品2．26g，Sephedex A50层析柱纯化后得纯制品1．84g，经B型RBC吸收放散后得特异性IgG 0．55g，回收率达29．89％(0．55／1．84)。结论 采用半饱和硫酸铵低温沉淀法分离高效价IgG抗体，可以获得高纯度的IgG。     

W／O／W型甘草酸单铵盐口服复乳的处方设计及其理化特性研究

采用均匀设计，以乳剂的稳定性参数为考察指标，考察了初乳乳化剂、复乳乳化剂、乳化时间等因素对复乳稳定性的影响；筛选出Ｗ／Ｏ／Ｗ型甘草酸单铵盐口服复乳的优化处方和工艺，并对复乳的主要理化特性和物理稳定性进行了考察。     

Quantitative determination of anti-dsDNA antibodies and antibody/dsDNA stoichiometries in prepared,soluble complement-fixing antibody/dsDNA immune complexes

We have investigated quantitatively the complement-mediated binding of prepared, soluble ¹²⁵I-7S IgG antibody/³H-dsDNA immune complexes to human red blood cells (RBCs). We have performed these studies by using a detailed modification of the RBC-CF assay [Pedersen et al., J. Immun. Meth. 38, 2692–2280 (1980)] which now allows for the simultaneous measurement of both ³H-DNA and ¹²⁵I-binding to the cells. Our results indicate that, in the case of three SLE patients, their anti-dsDNA antibody titers are sufficiently high that a small fraction of their ¹²⁵I-7S IgG antibodies (ca 0.1–0.2%) can be identified as specifically anti-dsDNA. We have also used an indirect method (with ¹²⁵I-labelled rabbit anti-human IgG) for the determination of IgG anti-dsDNA antibodies in complement-fixing antibody/dsDNA immune complexes that bind to RBCs, and the results of these measurements are in reasonable agreement with the direct binding experiments. These studies have also allowed us to estimate the antibody/DNA stoichiometries in complement-fixing immune complexes. The results of these experiments may provide a useful standard for the analysis of monoclonal anti-dsDNA antibodies.     

Direct quantitation of antiseptic quaternary ammonium compounds by fast atom bombardment mass spectrometry

The medicinally important quaternary ammonium salts benzyldimethyltetradecylammonium chloride (BDTA), cetylpyridinium chloride and benzethonium chloride, all afford, under fast atom bombardment (FAB) mass spectrometric conditions, abundant and persistent [M---Cl]⁺ species usefully amenable to quantitative analysis with the aid of thioglycerol as a liquid FAB matrix. The use of BDTA as an internal standard allowed a direct, precise and accurate determination of cetylpyridinium and benzethonium chlorides, either as pure samples or in dosage forms, in the concentration range 0.05–2 mg/ml.     

一氧化氮对犬下食管括约肌压力的作用

目的 :应用苄基二甲基十四烷氯化铵 (benzyldim ethyltetradecyl amm onium chloride,BAC)建立犬下食管括约肌(L ES)无神经动物模型 ,研究一氧化氮 (NO)对 L ES压力的作用。方法 :将 BAC环周注入犬 L ES,对照组注入等量生理盐水 ,均于注射前及注射后 6周测定 L ES压力 ;并观察 L -精氨酸、D -精氨酸、硝普钠及一氧化氮合酶 (NOS)抑制剂 N-硝基 - L -精氨酸 (L - NNA)对 L ES压力的影响 ;此外还测定了两组犬 L ES中 NO含量和 NOS活性。结果 :BAC处理组 L ES压力 [(4 2 .43±4.19) m m Hg,1m m Hg=0 .133 k Pa]显著高于对照组 [(2 2 .71± 5 .19) mm Hg]。 L -精氨酸可使对照组 L ES压力降低 ;L - NNA使其增高 ,但对 BAC处理组 L ES压力均无影响。硝普钠可降低两组犬 L ES压力。对照组 L ES中 NO为 (6 .0 5 8± 2 .0 6 7)μm ol/g,NOS为 (1.45 8± 0 .146 ) U /mg;而 BAC处理组 NO为 (1.797± 0 .873)μmol/g,NOS为 (0 .46 3± 0 .0 39) U /m g,均较对照组显著降低 (P<0 .0 1)。 结论 :BAC可使犬 L ES压力增高 ,其机制可能与 L ES局部 NO减少有关。     

双苄基异喹啉季铵类化合物的合成及肌肉松驰活性

目的：获得起效快、复原快的肌肉松驰剂。方法：1类化合物以汉防乙甲素为原料,经季铵化制得。Ⅱ类以阿曲库铵的结构为模板,对其1－取代基进行结构改造而得,所有目的化合物的结构经IR、^1HNMR、MS鉴定。结果：设计合成了未见文献报道的11个两类双苄基异喹啉季铵类化合物。结论：初步药理试验表明,目的化合物1c的起效剂量、起效时间与汉肌松相当。