高效液相色谱法测定香薷药材中香芹酚和百里香酚的含量

目的 :建立香薷药材中香芹酚和百里香酚的含量测定方法。方法 :用高效液相色谱法 ,95 %乙醇超声提取 ,色谱柱InertsilODS-3,流动相甲醇 水 冰醋酸 (60∶40∶2 ) ,检测波长 274nm。结果 :香芹酚在 023～215μg (r=0.9999) ,百里香酚在 039～236μg (r =0.9999)有良好的线性关系 ;平均回收率分别为香芹酚 99.9% (RSD 1.4 % ) ,百里香酚 98.6 % (RSD 1.3% ) ,重复性的RSD分别为香芹酚 1.1% ,百里香酚 1.6 %。结论 :该方法可靠、便捷 ,可以作为控制香薷药材质量的方法。     

Use of the DISST Model to Estimate the HOMA and Matsuda Indexes Using Only a Basal Insulin Assay

Background:It is hypothesized that early detection of reduced insulin sensitivity (SI) could prompt intervention that may reduce the considerable financial strain type 2 diabetes mellitus (T2DM) places on global health care. Reduction of the cost of already inexpensive SI metrics such as the Matsuda and HOMA indexes would enable more widespread, economically feasible use of these metrics for screening. The goal of this research was to determine a means of reducing the number of insulin samples and therefore the cost required to provide an accurate Matsuda Index value.Method:The Dynamic Insulin Sensitivity and Secretion Test (DISST) model was used with the glucose and basal insulin measurements from an Oral Glucose Tolerance Test (OGTT) to predict patient insulin responses. The insulin response to the OGTT was determined via population based regression analysis that incorporated the 60-minute glucose and basal insulin values.Results:The proposed method derived accurate and precise Matsuda Indices as compared to the fully sampled Matsuda (R = .95) using only the basal assay insulin-level data and 4 glucose measurements. Using a model employing the basal insulin also allows for determination of the 1-day HOMA value.Conclusion:The DISST model was successfully modified to allow for the accurate prediction an individual’s insulin response to the OGTT. In turn, this enabled highly accurate and precise estimation of a Matsuda Index using only the glucose and basal insulin assays. As insulin assays account for the majority of the cost of the Matsuda Index, this model offers a significant reduction in assay cost.     

基于计算机辅助药物设计的石荠苧抗流感药效物质多靶向作用研究简

目的 探讨石荠苧抗流感药效物质的多靶向作用机制.方法 以石荠苧中化学成分5-羟基-6,7-二甲氧基黄酮及其衍生物（MF1,MF2,MF3）为候选药物,采用计算机辅助药物设计方法研究其与流感血凝素蛋白（HA）、流感神经氨酸酶（NA）、炎症靶点环氧合酶-2（COX-2）和炎症靶点磷酸二酯酶4（PDE4）受体的对接程度.结果 在各候选药物与相关蛋白的对接中,木犀草素与HA活性位点的匹配度最高;鼠李柠檬素与NA和PDE4活性位点的匹配度最高;槲皮素与COX-2活性位点的匹配度最高;其中MF1,MF2,MF3也均表现出不同程度的匹配.结论 石荠苧中化学成分与流感病毒蛋白靶点和炎症相关蛋白靶点具有一定的结合和抑制效应,从而具多靶向抗流感病毒作用.     

江香薷挥发油提取工艺优化

目的：确定江香薷挥发油最佳提取工艺。方法：以挥发油所得量为评价指标，采用单因素比较法对提取过程中的加水量、药材粉碎度、提取时间、浸润时间及药材提取部位等进行了全面比较。结果：确立了香薷挥发油最佳提取工艺。     

江香薷醇提物石油醚部位化学成分分析

目的:研究江香薷醇提物石油醚部位的化学成分。方法:采用GC-MS联分析和鉴定化学成分。结果:在最佳分析条件下,经毛细管色谱分离、气相质谱分析工作站WILEY/NBS库,NIST02质谱数据库检索,并参照有关文献,共分离出50个峰,鉴定了38个化学成分。含量较高的化合物为百里香酚(18.31%),3,13-十八碳二烯-1-醇(10.26%),香荆芥酚(8.60%)等。结论:利用GC-MS分析鉴定江香薷脂溶性成分,具有快速、稳定、重复性好的特点,可用于江香薷药材成分的分析鉴定。     

苏州荠苧成分的研究——Ⅱ.苏荠苧黄酮的分离及其结构

苏州荠苧(Mosla soochowensis Matsuda)为唇形科,石荠苧属植物。前文已报道从民间草药苏州荠苧中分得荠苧黄酮(mosloflavone)[Ⅰ]证明为5-羟基6、7-二甲氧基黄酮     

Tetralogy of Fallot Associated with Aortic Insufficiency

Five patients with tetralogy of Fallot associated with aortic insufficiency were studied. They ranged from 6 to 34 years old (mean, 14 years), and 2 patients had a history of subacute bacterial endocarditis. Four patients had a bulboventricular type of ventricular septal defect. Prolapse of the right coronary cusp was the main cause of aortic insufficiency. Deformed valve secondary to subacute bacterial endocarditis and severe dilatation of the aortic annulus were the other causes. In addition to repair of the tetralogy defect, aortic valvuloplasty was performed in 2 patients. In the remaining 3 patients, the ventricular septal defect was closed with a relatively small-sized patch and no aortotomy was made. Four patients survived the operation, and no residual aortic insufficiency was observed in 3 of them. The etiology and the method of operation are discussed.     

Successful Rastelli Operation in Infant with Complete Transposition of Great Arteries,Levoposition of Aorta,and Subaortic Ventricular Septal Defect

A 10-month-old infant with complete transposition of the great arteries (TGA) {S, D, L} and large ventricular septal defect (VSD) without left ventricular outflow tract obstruction underwent successful Rastelli operation utilizing a 16 mm Hancock graft. The VSD was subaortic, and an internal conduit was placed easily. Postoperative hemodynamic conditions were satisfactory, and the patient was doing well eighteen months after operation. The feasibility of primary Rastelli operation for TGA and VSD in young infants is described.     

石香薷精油对白纹伊蚊的生物活性研究及其成分分析

目的测定石香薷（Moslem chinensis Maxim）精油对白纹伊蚊（Aedes albopictus）的生物活性,分析石香薷精油的化学成分,为开发植物源蚊虫控制剂提供研究基础。方法水蒸汽蒸馏法提取石香薷精油;采用浸液法测定精油对白纹伊蚊4龄期幼虫及蛹的毒杀活性;采用人体局部涂肤法测试其对成蚊的驱避活性;通过气相色谱-质谱联用法分析石香薷精油的化学成分。结果 （1）石香薷精油对4龄期幼虫及蛹的24hLC50值分别为78.820和122.656μg/ml;（2）涂抹1.5mg/cm^2的纯精油,对成蚊有（2.330±0.167）h的完全保护时间,6h后仍然有56%的保护率;（3）从精油中共检出44种化合物,鉴定出39种,占总量的98.67%。主要成分有：对-聚伞花素（23.17%）、香荆芥酚（16.83%）、百里香酚（14.92%）、2-异丙基-4-甲基茴香醚（12.89%）、桉树脑（8.48%）、石竹烯（3.96%）、α-石竹烯（3.16%）和乙酸瑞香酯（2.71%）。结论石香薷精油对白纹伊蚊幼虫及成蚊均有较强的生物活性,具有从中发现新的灭蚊天然活性化合物和研发成环保型蚊虫控制剂的潜力。     

苏州荠芋挥发油的提取工艺研究

目的：考察苏州荠芋挥发油的不同提取方法，以确定最佳提取工艺。方法：采用超临界CO2萃取、水蒸气蒸馏和有机溶剂萃取三种方法提取苏州荠芋挥发油，以所得得油率和所得挥发油的化学成分为指标，对三种方法进行比较。结果：经GC—MS分析结果表明，超临界CO2萃取的得油率为3．46％，要高于其它提取方法。采取超临界CO2萃取和水蒸气蒸馏的苏州荠芋挥发油品质较优。三种方法提取的苏州荠芋挥发油的主要成分基本相似。主要为甲基丁香酚（methyleugenol），占42％左右；其次是单萜类化合物龙脑稀（bomene）、侧伯酮（thujone）、二氢香芹酮（dihydrocarvon）、香荆芥酚（carvacrol）等，占27％左右；再次是倍半萜类化合物橙花烯（nerolidene）和γ-杜松烯等约占19％左右。结论：超临界CO2萃取法为提取苏州荠芋挥发油的理想方法。