HPLC法测定人血浆中比阿培南的浓度及其药动学研究

目的：建立人血浆中比阿培南的高效液相色谱检测方法。方法：色谱柱为Agilent ZORBAX Bonus-RP（4.6 mm×250 mm,5μm）;流动相为甲醇和0.03%醋酸水溶液,采用梯度洗脱法;流速为1.00 ml/min;检测波长为300 nm,血浆样品处理选用5-羟基吲哚乙酸为内标,采用硫酸锌沉淀蛋白。结果：比阿培南在0.2～50.0μg/ml范围内线性良好,HPLC测定定量下限为0.2μg/ml,比阿培南和内标在血浆的保留时间分别为3.9 min和9.7 min,出峰迅速。比阿培南浓度分别为0.5、5.0和40.0μg/ml,血浆样本回收率分别为101.8%、100.8%、100.4%;精密度试验日内和日间RSD均小于15%,稳定性试验结果表明血浆样品在样品处理过程中较稳定（RSD〈15%）。结论：本方法灵敏度高,操作简便,快速,重复性好,适用于比阿培南血浆浓度的测定。     

Reversible lactic acidosis associated with repeated intravenous infusions of sorbitol and ethanol.

Infusions of fructose or sorbitol are used commonly in parenteral nutrition and may cause lactic acidosis. A case is reported in whom blood lactate concentration was monitored frequently over a 5-day period during intravenous feeding with a sorbitol-ethanol-amino acid mixture. During the first five infusions blood lactate rose only moderately, but with the final infusion lactate rose to 11-1 mmol/l and the patient had a severe metabolic acidosis. In retrospect the patient had shown deterioration in renal and hepatic function tests during the preceding 24 hr. On terminating the infusions the blood lactate concentration fell rapidly. It is suggested that great care should be exercised when using such infusions in ill patients and acid base status and renal and hepatic function should be monitored frequently.     

正常人骨髓基质祖细胞体外传代培养的实验研究

目的 :研究正常人骨髓基质祖细胞 ( CFU- F)在体外传代培养过程中的功能变化。方法 :采用体外液体单层和半固体培养法。结果 :F1传代细胞对骨髓红系祖细胞集落形成单位 ( CFU- E)和粒系祖细胞集落形成单位 ( CFU- GM)支持能力最显著 ,F2 代对有核细胞粘附能力最显著。结论 :F1代是进行第二次接种骨髓细胞的最佳时机 ,而对有核细胞的粘附能力主要与成纤维细胞有关。     

用免疫化学分析仪测定正常人精液中P^30的含量

This paper is the first report about the measurement of p30 level in the normal human seminal plasma by the Beckman immunochemistry system (ICS) using anti-p30 serum. The p30 levels of 108 samples of normal human seminal plasma were measured. The range of p30 level was 0.2996-4.3913 mg/ml. The square root transformation statistical analysis indicated that the coefficient of skewness was 0.0237 the coefficient of kurtosis was -0.8854, the p30 level in normal human seminal plasma fitted the square root normal distribution, the mean was 1.6236 mg/ml and the standard deviation was 0.1641 mg/ml.     

对HPLC法测定茶碱血药浓度的改进

目的 :使用与日常工作中测定一些常用抗癫痫药物 (如 :苯妥英钠、卡马西平、苯巴比妥 )相同的流动相 (甲醇—水 1∶1) [1\〗,建立用HPLC法测定茶碱血药浓度的方法 ,希望在日常治疗药物监测工作中能起到降低成本、提高效率的作用。方法 :用二氯甲烷萃取血清中的茶碱 ,浓集后进样测定 ,以内标法定量。在室温条件下 ,使用ELITEC18色谱柱 (5 μm) ,以甲醇—水 (1∶1)为流动相 (流速 1.0mL/min) ,以咖啡因 (0 .1g/L)为内标 ,检测波长2 75nm。结果 :本方法线性范围 0 .5mg/L～ 2 0 .0mg/L ,相关系数 0 .9992 ,检测限 0 .2mg/L ,回收率 96 %～ 10 5 %。结论 :方法灵敏、简便、准确 ,适用于对茶碱进行治疗药物监测的需要 ,在和一些常用抗癫痫药物先后测定时可以有效地降低成本、提高效率     

微卫星及在血友病甲基因诊断中的研究进展

血友病甲是一种最为常见的遗传性出血性疾病,微卫星在其基因诊断中发挥着越来越重要的作用。     

Studies on diarrhea in neonatal calves: the plasma proteins of normal and diarrheic calves during the first ten days of age

The concentration of serum proteins and plasma fibrinogen were determined in 151 normal and 49 diarrheic calves at intervals from birth to ten days of age. There were significant differences in the concentrations of the various serum proteins in normal calves when the results were analysed at six age intervals. There was no significant relationship between the concentration of the various proteins and the season of the year.Of the diarrheic calves, those that died had significantly lower gamma globulin concentrations than the other calves. Severely diarrheic and dehydrated calves had significantly increased serum albumin and alpha glabulin concentrations and decreased gamma globulin concentrations. No significant variation occurred in total serum protein concentration. Plasma fibrinogen concentrations were similar in normal and diarrheic calves.     

HPLC法测定人血浆中二甲双胍的浓度

目的建立测定人血浆中二甲双胍浓度的方法。方法反相高效液相色谱法,0.15 mL血浆加入内标,再加入饱和氢氧化钠水溶液碱化后,用2 mL正丁醇-正己烷(体积比2∶1)混合物萃取,再用适量质量分数为1%的甲酸反萃浓缩,以乙腈-磷酸二氢钾水溶液[磷酸二氢钾浓度:10 mmol/L,十二烷基磺酸钠(SDS)浓度:6 mmol/L,三乙胺0.12%,磷酸调pH=3.50](体积比30∶70)为流动相,用依利特Kypersil BDS C18色谱柱(4.6 mm×150 mm,5μm)进行分离,检测波长为233 nm,柱温40℃。结果标准曲线的线性范围为10~1000 ng/mL,最低定量限为10 ng/mL。低、中、高3个质量浓度的质控样品的绝对回收率均大于78.0%(n=5),日内RSD均小于5.3%,日间RSD均小于8.7%(n=3)。结论该方法灵敏度高,准确、可靠,可用于二甲双胍药动学和生物等效性的研究。     

华蟾毒精和羟基华蟾毒精的人肠内细菌代谢研究

目的：研究人肠内细菌对蟾酥中主要成分华蟾毒精和羟基华蟾毒精的代谢。方法：采用体外人肠内细菌粗酶与华蟾毒精和羟基华蟾毒精温孵法;根据波谱学和化学数据鉴定代谢产物的结构;根据原形化合物和代谢产物的体外抑制人癌细胞系(HCT-8、KB、BGC、BIU 和HeLa )的生长评价其抗肿瘤活性。结果：华蟾毒精可由人肠内细菌代谢产生去乙酰基华蟾毒精;羟基华蟾毒精可由人肠内细菌代谢产生去乙酰基羟基华蟾毒精;原形化合物具有强抑制人癌细胞生长的活性,而其代谢产物无活性。结论：华蟾毒精和羟基华蟾毒精由肠内细菌代谢而失活。     

复方升白胶囊的质量标准研究

目的：建立复方升白胶囊的质量检测方法。方法：用薄层色谱法对该胶囊剂中的枸杞子、女贞子和当归进行了鉴别;用高效液相色谱法测定该胶囊剂中芍药苷（Paeoniflorin)的含量。结果：薄层色谱中斑点清晰,易于识别;芍药苷进样量在0．1987－0.9936μg内呈线性关系,r=0.9995,平均加样回收率为98．8％,RSD为1．9％。结论：本方法可有效地控制复方升白胶囊的质量。