影响拉西地平片溶出度的主要因素探讨

摘要：目的：在原有生产条件下通过调整生产工艺寻找出影响产品溶出度的因素,进而确定最佳工艺参数解决拉西地平片生产过程中溶出度较低问题,提高产品质量、降低生产成本。方法：通过分析影响溶出度的原因在相同工艺条件下找出主要影响因素确定最佳方案。结果：采取有效措施后提高了拉西地平片的溶出度。结论：采取的有效措施方法简单易行能保证产品质量,适用于工业化大生产。     

肺表面活性物质抑制物

肺表面活性物质(Pulmonary Surfactant,PS)主要由磷脂和脱辅基蛋白组成,它们在肺泡表面形成单分子膜,发挥降低肺泡表面张力的重要功能。已有一些研究表明,PS单分子表面膜的形成及其活性可以受到某些物质的干扰和抑制,现分别予以介绍。 1 蛋白质类抑制物人们很早就注意到血浆蛋白对PS的表面活性的抑制作用。1965年,Tierney等在提取兔PS的过程中加入全血或血清,结果使肺浸出液表面活性下降。接着,Cooper等在研究烫伤狗PS改变时证明血浆可以抑制肺灌洗液     

高效液相色谱荧光法检测人血浆氧氟沙星浓度

目的：建立检测人血浆氧氟沙星的高效液相色谱法。方法：用φ为１０％的三氯乙酸甲醇溶液处理血浆。色谱柱为Ｓｐｈｅｒｉｓｏｒｂｃ１８（５μｍ，２００×４．６ｍｍＩ．Ｄ．）；流动相为甲醇－水－１０％四丁基溴化胺－８５％磷酸（φ分别为２５％、７０％、５％、０．０１％）；体积流量（ｑｖ）为１．０ｍｌ·ｍｉｎ－１；荧光检测激发波长为２９５ｎｍ，发射波长为５０５ｎｍ。结果：重复性试验示日内及日间相对标准差均小于５％。氧氟沙星的平均回收率为９４．８％。结论：本法灵敏度高，重复性好，适用于药代动力学和临床研究。     

S-33 High-performance liquid chromatographic determination of flunarizine in serum

AIM: To study the serum level of flunarizine, a Ca~(2 ) channel blocker, we established a sensitive, accurate and efficient HPLC method. METHODS: A Shimadzu LC-6A HPLC general system was used. The column was     

高效液相色谱法测定人血浆法莫替丁浓度

本实验用HPLC法测定人血浆中的法莫替丁浓度。血浆用硅胶小柱预处理。色谱柱为Spherisorb C_(18)(5μ,4.6×250mm),流动相为甲醇—乙腈—水—磷酸(10V:10V:80V:0.08V)。检测波长为267nm,用外标法峰面积定量(y=0.00805X+3.05,r=0.999,线性范围:12.5～125ng/ml)。回收率下均为80%,日内及日间误差均小于7%。本法灵敏度高,准确性好。适用于生物利用度和临床研究。     

Determination of Tinidazole in Human Plasma by RP-HPLC

采用反相高效液相色谱法测定人血浆替硝唑浓度。色谱柱为ＳｈｐｅｒｉｓｏｒｂＯＤＳ，紫外吸收检测波长为３１８ｎｍ。以甲硝唑为内标物。本法检测日内和日间相对标准偏差均小于７％。从血浆提取替硝唑的平均回收率为９４．２％。     

Functional changes of pulmonary surfactant in rats with lung injury induced by endotoxin

We studied the functional changes of pulmonary surfactant (PS) in acutelung injury models produced by endotoxin injection (E.coli O_(55)B_5) in rats.The sur-face properties of the lung lavage liquid and the total phospholipids (TPL) ex-tracted from it were assessed on a modified Wilhelmy film balance.γ-A isothermof the lavage liquid revealed an increase in minimum surface tension and a de-crease in hysteresis area,recruitment index and stability index,whereas that ofTPL extracted from it did not show any change except for hysteresis area.Thesurface activity correlates positively with the TPL content but negatively with thetotal protein content in the lavage liquid.The findings indicated that there was adysfunction of PS in rats with the lung injury induced by endotoxin,suggestingthat the function deficiency of PS might be caused by decreased phospholipidsand increased proteins in the alveoli.