红三叶异黄酮的研究进展

红三叶Trifoloium pratense L．又名红车轴、红花苜蓿、红荷兰翘摇等，是豆科三叶草属（Trifolium L．）多年生草本植物。寿命4～6年，直根系，主根入土深，一般90～150cm，侧根主要分布于表层5～40cm的土层中；分枝能力强，一般达10～15个，多者30个；茎自根颈处生出，圆形，中空，直立或斜生；托叶大，先端尖锐，膜质，有紫色脉纹；三出复叶，小叶卵形或椭圆形，叶面有灰白色或褐色“V”形斑，茎叶有茸毛；头形总状花序，生于茎枝顶端或叶腋处，每个花序有小花50～100朵，     

替比夫定和恩替卡韦治疗HBeAg阳性慢性乙型肝炎的疗效及HBeAg血清学转换的预测因素

目的 观察替比夫定(LDT)与恩替卡韦(ETV)治疗HBeAg阳性慢性乙型肝炎的52周临床疗效.方法采用1∶1随机单盲、对照设计.共人组HBeAg阳性慢性乙型肝炎患者180例,其中LDT组90例,LDT 600mg口服,每天1次; ETV组90例,ETV 0.5 mg口服,每天1次.治疗52周进行疗效评估,并对HBeAg血清学转换相关的因素进行分析.根据资料不同采用t检验、x2检验或Logistic回归分析进行统计学分析.结果 治疗52周时,HBV DNA检测不到率,ETV组为88.9%,LDT组为78.9%,差异无统计学意义.HBeAg阴转率、HBeAg血清转换率和HBeAg较基线下降水平,LDT组分别为28.9%、27.8%和(774.7±542.4)PEIU/ml,ETV组分别为15.6%、14.4%和(603.4±480.5)PEIU/ml,两组比较,x2值分别为4.63和4.80,t值为2.02,P值均＜0.05,差异有统计学意义.治疗52周时,病毒学突破率LDT组为4.4%,ETV组为0%,x2=4.09,P＜0.05.LDT组和ETV组在治疗52周时是否出现HBeAg血清学转换与基线ALT和HBV DNA水平无相关性.多因素逐步Logistic回归分析显示,LDT组有3个因素与治疗52周HBeAg血清学转换相关,依次为:24周时HBeAg下降＞2 log,12周时HBeAg下降＞1log,基线HBeAg水平;ETV组有3个因素与52周HBeAg血清学转换相关,依次为24周时HBeAg下降＞2 log,36周时HBeAg下降＞2 log,12周时HBeAg下降＞2 log.结论 治疗HBeAg阳性慢性乙型肝炎52周,LDT较ETV有更高的HBeAg转换率,ETV组有更低的耐药率.24周时HBeAg下降＞2 log可同时作为两组患者52周HBeAg血清转换的最佳预测因素.

Abstract：

Objective To investigate the efficacy of Telbivudine and Entecavir for therapy of HBeAg positive chronic hepatitis B for 52 weeks. Methods In this random and control study, the efficacy of Telbivudine and Entecavir treatments were compared in 180 patients with HBeAg positive chronic hepatitis B.The patients were randomly assigned to a daily 600 mg Telbivudine treatment group or daily 0.5 mg Entecavir group for 52 weeks. Results At week 52, HBV DNA undetectable rate was better in the Entecavir-treated group than in the Telbivudine-treated group, but didnt reach statistical signficance. The viral breakthrough rates were significantly lower in the Entecavir-treated group than in the Telbivudine-treated group ( x2 = 4.09, P ＜ 0.05). The clearance and seroconversion of HBeAg and the mean reductions of HBeAg from baseline at week 52 were significantly greater in the telbivudine-treated group than in the entecavirtreated group ( x 2 clearance = 4.63, x2 seroconversion = 4.80, tmean reductions= 2.02; P ＜ 0.05). The HBeAg seroconversion rates were not associated with both baseline ALT and baseline HBV DNA in both groups (P ＞ 0.05). In Telbivudine-treated group, the HBeAg decline＞2 log at week 24, HBeAg decline＞1 log at week 12 and the HBeAg baseline were independent factors correlated to HBeAg seroconversion rates at week 52 by Binary Logistic analysis, and also in entecavir-treated group the HBeAg decline＞2 log at week 24, HBeAg decline ＞2 log at week 36 and the HBeAg decline＞2 log at week 12 were independent factors correlated to HBeAg seroconversion rates at week 52. Conclusion Significant difference of HBeAg seroconversion rates at week 52 existed between Telbivudine-treated group and Entecavir-treated group. Entecavir is significantly superior to Telbivudine with less resistance to nucleosides. HBeAg decline＞2 log at week 24 is the best predicting factor for HBeAg seroconversion at week 52.     

超声波技术提取蚕蛹中蚕蛹油的工艺研究

目的:考察超声波技术提取蚕蛹油工艺各因素对蛹油提取率的影响.方法:单因素试验和正交试验.结果:超声波提取为最佳提取方法,石油醚是最佳溶剂.提取时间、提取温度、固液比和超声波功率四个因素对提取率的影响,并通过正交试验确定了最佳的提取工艺.结论:采用超声波提取技术,石油醚为萃取溶剂,在55℃下提取6 h,固液比为1:7,功率100W,提取率为29.67%.     

甘薯叶浸膏抑菌活性的研究

甘薯(Ipomoea batatas Lam),为旋花科(convolvulaceae)甘薯属甘薯种一年生或多年生草本蔓生植物.甘薯原产美洲,约在500年前传入我国.