冰醋酸涂剂稳定性研究

目的：研究冰醋酸涂剂的稳定性。方法：采用酸碱中和分析法和气相色谱法分别对醋酸与其不稳定产物乙酸乙酯运行定量测定。结果：在放置过程中醋酸含量下降，而乙酸乙酯含量增加。结论：《中国医院制剂规范》第2版收载的冰醋酸涂剂不稳定。     

HPLC测定复方松泰洗剂中醋酸氯己定含量

建立HPLC法测定复方松泰洗剂中醋酸氯己定的含量。用YWGC18柱 ,以乙腈 -水 -三乙胺 (2 9∶71∶0 5 ,用磷酸调pH至 3 0 )为流动相 ,流速 1ml·min- 1,检测波长 2 5 4nm。醋酸氯己定在 0 716～ 3 5 8μg范围内线性关系良好 ,r =0 9998,平均回收率 99 2 %。本法适用于复方松泰洗剂的质量控制。     

醋酸地塞米松片含量均匀度紫外测定波长偏离原因考察

目的　寻找醋酸地塞米松片含量均匀度测定时紫外波长偏离的原因。方法　用紫外分光光度法测定含量均匀度测定液的最大吸收波长值 ,对超出药典规定范围的测定液用高效液相色谱法分离 ,观察有无杂质出现。色谱柱为Elit testODS柱 (2 4 0mm× 4 6mm) ,流动相 :甲醇 -水 (70∶30 ) ,检测波长 2 4 0nm。同时用离心法考察辅料对波长偏离的影响。结果　主药中含有的杂质和辅料使醋酸地塞米松片含量均匀度紫外测定波长偏离。结论　用HPLC测定醋酸地塞米松片含量均匀度可避开波长偏离的干扰 ,使结果准确     

复方替硝唑含漱液的制备与含量测定

目的:制备复方替硝唑含漱液,建立其含量测定方法并进行稳定性研究.方法:采用最大吸收波长法测定替硝唑的含量,用双波长等吸收点法测定醋酸氯己定的含量,恒温加速试验法考察稳定性.结果:替硝唑回归方程为C＝－0.039 68＋27.491 A,r＝0.999 9,醋酸氯己定回归方程为C＝0.062 47＋50.454 8△A,r＝0.999 99,精密度和回收率良好,置65℃(96 h),70℃(72 h),75℃(48 h)恒温水浴中加热,含量无明显下降.结论:复方替硝唑含嗽液制备方法简单,含量测定方法简便且稳定性好.     

RP-HPLC法测定帕利百中醋酸泼尼松龙的含量及其有关物质

目的：采用反相高效液相色谱法(RP一HPLC)测定帕利百中醋酸泼尼松龙含量及其有关物质。方珐：采用ODS柱，以水一乙腈(60：40)为流动相测定醋酸泼尼松龙的含量；以水-乙腈(69：31)为流动相测定醋酸泼尼松龙有关物质的含量，均于254nm处检测。结果：醋酸泼尼松龙在质量浓度为24～56μg／ml范围内呈良好的线性关系(r=1．0000)，平均回收率为100．0％(RSD=0．4％，n=6)，日内RSD为0．4％(n=6)，日间RSD为0．3％(n=5)。结论：本法简便、快速、准确、可靠。     

高效液相色谱法测定泰唑洗液中甲硝唑和醋酸氯己啶的含量

目的　建立泰唑洗液中甲硝唑和醋酸氯己啶含量的HPLC测定方法。方法　采用C18柱 (2 5 0mm× 4 .6mm ,10 μm ) ,流动相为甲醇 乙腈 三乙胺缓冲液 (0 .0 5mol·mL-1,用磷酸调节 pH至 2 .5 ) (30∶ 30∶ 4 0 ,v/v ) ,内标物为醋酸泼尼松。流速为 1.0mL·min-1,检测波长为 2 5 4nm。结果　线性范围 :甲硝唑 32～ 12 8μg·mL-1(r =0 .99996 ) ,醋酸氯己啶 2 0～80 μg·mL-1(r =0 .99997)。精密度 :日内及日间RSD为 :甲硝唑 0 .12 % (n =6 )和 0 .32 % (n =5 ) ;醋酸氯己啶 0 .18% (n =6 )和 0 .35 % (n =5 )。平均回收率甲硝唑为 10 0 .4 % (RSD =0 .19%n =5 ) ,醋酸氯己啶为 99.94 % (RSD= 0 .2 0 % ,n =5 )。结论　本法简便 ,快速 ,准确 ,可用于该制剂的质量控制     

甲孕酮联合MVP方案与单纯MVP方案治疗晚期非小细胞肺癌的对比研究

目的　观察患者服用甲孕酮合并 MVP方案与单纯使用 MVP方案化疗治疗初治非小细胞肺癌(non- small cell cancer,NSCL C)的疗效 ,生活质量改善 ,毒性等情况并加以比较。方法　 A组 (2 9例 )接受甲孕酮 MVP方案治疗 ,B组 (2 7例 )接受 MVP方案治疗 ,采用单盲随机分组 ,毒性反应按 WHO标准进行评价。结果　 A、B两组疗效 (CR PR)分别为 2 7.6 %及 2 2 .2 % ,P>0 .0 5。中位生存期 A组 30周 ,B组 2 4周 ,(P<0 .0 1)。白细胞、血红蛋白减少及恶心、呕吐反应 ,B组较 A组明显 ,差异有显著性。两组均未发现其他严重的毒性反应。结论　甲孕酮联合 MVP方案组与单纯 MVP方案治疗组疗效差异无显著性 ,但前者中位生存期长 ,患者生活质量改善 ,毒副反应小     

Hydrolysis kinetics of propylene glycol monomethyl ether acetate in rats in vivo and in rat and human tissues in vitro.

The kinetic equivalency of propylene glycol monomethyl ether (PGME), derived from propylene glycol monomethyl ether acetate (PGMEA), as well as the parent compound (PGME) following intravenous administration to Fischer 344 rats was evaluated. In addition, in vitro hydrolysis rates of PGMEA in blood and liver tissue from rats and humans were determined. The blood kinetics were determined following iv administration to rats of PGME and PGMEA of low [10 and 14.7 mg/kg body weight (bw)] or high (100 and 147 mg/kg) equimolar dosages of PGME and PGMEA, respectively. The blood time courses of PGME elimination for both dosages of both compounds were identical. Half-lives of PGMEA elimination following iv administration of 14.7 or 147 mg PGMEA/kg bw were calculated to be 1.6 and 2.3 min, respectively. Rat and human in vitro hydrolysis rates of PGMEA were determined by incubation of 5 or 50 microg PGMEA/ml in whole blood or liver homogenate. The rate of loss of PGMEA was more rapid in rat blood than in human blood, with hydrolysis half-lives of 36 and 34 min in human blood and 16 and 15 min in rat blood for the 5 and 50 microg/ml concentrations of PGMEA, respectively. In contrast the rate of loss of PGMEA in human and rat liver homogenate incubations was similar, 27-30 min and 34 min, respectively. These data demonstrate the rapid hydrolysis of PGMEA in vivo to its parent glycol ether, PGME and that, once hydrolyzed, the kinetics for PGME derived from PGMEA are identical to that for PGME. This study supports the use of the toxicological database on PGME as a surrogate for PGMEA.     

Enhanced film-forming properties for ethyl cellulose and starch acetate using n-alkenyl succinic anhydrides as novel plasticizers

Purpose: The aim of this study was to investigate the ability of n-alkenyl succinic anhydrides (n-ASAs) to improve the film-forming characteristics of a novel coating polymer, potato starch acetate degree of substitution 2.8 (SA). n-ASAs were also applied to improve the otherwise brittle properties of ethyl cellulose (EC) aqueous dispersion (Aquacoat^®) and EC solvent-based films. Methods: The effectiveness of two n-ASAs, 2-octenyl succinic anhydride (OSA) and 2-dodecen-1-ylsuccinic anhydride were evaluated as plasticizers. Mechanical properties, both water vapor and drug permeabilities, and glass transition temperatures of the cast free films were measured. Triethyl citrate and dibutyl sebacate were used as reference plasticizers. Results: The long hydrocarbon chain of n-ASA, with its accessible carbonyl groups, enabled a strong plasticization effect on the tested polymers. Due to the excellent mechanical properties (i.e., a tough film structure with considerable flexibility) and low permeability of the plasticized films, n-ASAs, and especially OSA proved to be an ideal plasticizer particularly for EC based coatings. Also, the EC aqueous dispersion plasticized with n-ASAs resulted in a markedly enhanced coalescence of the colloidal polymer particles, even at low drying temperatures. Conclusions: In applications where a coating with high flexibility is required, n-ASAs can be used as plasticizers at moderately high concentrations (up to 60–70%, w/w) without losing the high tensile strength, excellent toughness and low permeability of EC and SA films.     

5-羟基-1H-吲哚-3-羧酸乙酯类化合物的合成及其抗流感病毒活性

目的设计合成5-羟基-1H-吲哚-3-羧酸乙酯类化合物,评价其抗流感病毒和抗呼吸道合胞病毒活性.方法经IR、1H-NMR和MS确证目标物结构,并经体外抗病毒试验进行活性筛选.结果与结论合成了9个5-羟基-1H-吲哚-3-羧酸乙酯类化合物,初步活性试验表明,具有一定的抑制流感病毒和呼吸道合胞病毒作用,其中,化合物Ⅷ1、Ⅷ2、Ⅷ5的抗病毒活性与利巴韦林和阿比朵尔相当.