溴甲酚紫指示剂对ELISA法加样的监测

输血系统自动化程度的提高 ,使检验质量有了充分的保证 ,但酶联免疫吸附法 (ELISA)实验中样品漏加现象时有发生 ,既有人为因素 (责任心不强 ) ,也有仪器设备因素 (全自动或手工加样器故障 )。目前某些国产试剂使用了样品加注指示剂 ,但一些进口试剂不具备指示剂 ,为此笔者尝试在Dia Sorin-HCV ELISA丙肝测定试剂盒样品稀释液中加入酸碱指示剂溴甲酚紫作为样品加注与否的指示 ,并进行对比实验 ,取得较好的效果。材料与方法1　材料1 .1　设备 :ML-FAME全自动酶免分析仪 (瑞士 ,Hamilton ) ,ML-STAR全自动加样仪 (瑞士 ,Hamilton) …     

不同浓度5-溴脱氧尿嘧啶核苷标记山羊骨髓基质干细胞的体外研究

Objective To explore the feasibility of labeling and tracing in vitro goat bone marrow mesenchymal stem cells (BMSCs) by bromodeoxyuridine (BrdU) on the basis of investigation of its optimal concentration, incubating time and cytotoxicity. Methods A healthy goat, aged 10 months old, male, weighing 32 kg, was used in this study. Bone marrow was aspirated. BMSCs were isolated and cultured using the adherence method in vitro. The fourth passage of BMSCs (P4) were incubated with BrdU at 5, 10, 15, 20 μmol/L as 5, 10, 15, 20 μmol/L BMSC groups. Cells were not labeled by BrdU as negative control. The following parameters were measured: induction, differentiation and determination of goat BMSCs; the optimal mass concentration and incubation time of 5-BrdU labeling; cell positive rate at 12, 24, 48 and 72 hours in each group using immunofluoreseenee; the cell survival rate after various concentrations of BrdU ladling by trypan-blue exclusion. Results The morphology of the primary and passage goat BMSCs was fusiform in shape. Goat BMSCs could differentiate into osteoblasts and chondrocytes following induction. BMSC nucleus showed green fluorescence under fluorescence microscope after being labeled by BrdU. The mean labeling rate increased with the increase in the concentration and incubation time of BrdU, and reached to (93.32± 3.25)% after incubation in 15 μmol/L, BrdU for 48 hours. There were no significant differences between 15 μmol/L BrdU for 72 hours, 20 μmol/L BrdU for 48 hours and 72 hours (P > 0.05), or between the other groups or time points (P < 0.05). The labeling rate of the blank control group was 0. The cell survival rate was all above 90% (P > 0.05). Conclusions BrdU can be used as a labeling marker for goat BMSCs. When the concentration is 15 μmol/L and the incubation time is 48 hours, the optimal labeling effect can be achieved. Goat BMSCs labeled with BrdU is of high efficiency and safety.     

4′-溴甲基-2-联苯甲酸叔丁酯的合成

4′-溴甲基-2-联苯甲酸叔丁酯（1）是降压药替米沙坦（telmisartan）的合成中间体。本研究参考文献，用4′-甲基-2-氰基联苯（2）经水解、酯化、溴代制得1（图1），并进行了改进。2在乙醇-水（5：1）中于80℃反应16h，得粗品纯度99％，可直接用于下步反应。酯化时，文献用浓硫酸催化或直接通入异丁烯制取，用HPLC跟踪反应进程，经试验结果不理想。现改在0℃用叔丁醇加DCC酯化，收率90％（文献：86．1％）。溴化时用氯仿代替四氯化碳㈨作溶剂。改进后的1总收率61％。     

低浓度布比卡因颈丛麻醉致心室纤颤救治成功1例

患者青年女性，17岁，40kg，既往体健，否认有任何药物过敏及中毒史，因左侧甲状腺瘤拟在颈丛麻醉下行左侧甲状腺次全切除术。术前血常规，生化检验，甲状腺功能检验，心电图及胸片，腹部B超均未有异常阳性发现，颈部B超示：左侧甲状腺瘤。术前30min肌注鲁米钠那0．1g，东莨菪碱5mg，人室后开放静脉，监测BP、HR、ECC、sPO2。先于颈4横突处注入0．2％布比卡因5mL行深颈丛阻滞，     

采用压缩机吸入溴化异丙托品溶液治疗婴幼儿喘息性疾病80例疗效观察

婴幼儿喘息性疾病(简称喘病)是儿科常见的一组疾病，其病因多样，发病机理尚未完全明确，目前多采用综合治疗，但少数病例疗效仍不理想。我院儿科两年来采用压缩机吸入溴化异丙托品溶液控制喘息状态。取得较好的疗效，现总结如下。     

DBH─PF分光光度法测定血清锌的研究

研究了在混合表面活性剂CTMAB和OP存在下，新试剂二溴羟基苯基荧光酮（DBH—PF）分光光度法测定血清中微量锌的最佳显色条件及应用。结果表明，在pH11．0～12．8的碱性介质中，CTMAB、OP及洒石酸钠的存在下，Zn2 与DBH－PF形成了1：3的紫色络合物，常温下可以稳定7h，λmax为602um，摩尔吸光团数k为5．851×104cm2／mol，血清锌在0～14μmol／L范围内服从Lambert－Beer定律，血清中大多数金属离子在一般情况下不干扰测定，可不加掩蔽剂直接测定血清锌。该法简便、特异、灵敏、准确、用血量少、无需沉淀蛋白、加热及特殊设备，是目前分光光度法测定血清锌的最灵敏方法之一，精密度为2．58％，平均回收率为102．7％，与AAS法比较结果无显著性差异，所以该法适于临床推广。