煤中氟化物浸提试验研究

首次采用浸提试验系统研究煤中氟化物赋存形态。结果表明,许多溶剂都能从煤中浸出相应形态和数量的氟化物,煤中不同浸提态氟按氟含量高低存在如下趋势:酸浸提态氟>碱浸提态氟>盐浸提态氟>水浸提态氟,浸提结果反映了煤中几种不同赋存形态氟化物含量的数量级概念,以无机盐矿物形态存在的难溶性氟化物是煤中氟的主要赋存形态。研究结果可为煤中氟赋存形态的研究提供试验方法与依据。

药用级硅胶管相容性试验研究

目的采用不同缓冲液对圣戈班Sani-Tech STHT-C药用硅胶管进行浸提,为硅胶管使用的安全性提供支持。方法参考《中国药典》2010年版3部、《欧洲药典》8.0版3.1.9、JP59 TEST for Rubber Closure for Aqueous Infusions、USP(87)、USP(88)、USP(231)、USP(381)。结果与结论圣戈班Sani-Tech STHT-C药用硅胶管浸提试验结果良好,相容性结果可接受,为制药企业选择圣戈班Sani-Tech STHT-C硅胶管提供参考。

Extraction and Content Determination of Shikimic Acid in Pinus elliottii Engelm

[Objective] The aim was to provide scientific basis for development and utilization of Pinus elliottii Engelm resources.[Method] The extraction process of shikimic acid in Pinus elliottii Engelm was studied,and the content of shikimic acid was determined by HPLC.The HPLC conditions were as follows;Alltima NH2 （5 μm,4.6 mm × 150 mm） column separation;the mobile phase was acetonitrile-2%H3PO4 （90：10）;the flowing velocity was 1 ml/min;test wavelength was 213 nm,the width of belt was 16 nm;reference wavelength was 300 nm,the width of belt was 80 nm.[Result] By the single factor and orthogonal tests,the optimum conditions were found as follows：ethanol concentration 60%,extraction temperature 75 ℃,solid-liquid ratio 1：25,extraction time 2.5 h.The extraction rate of shikimic acid was 1.49%.[Conclusion] Shikimic acid in Pinus elliottii Engelm could be used as a new resource to develop and utilize.

药用卤化丁基胶塞相容性研究

目的采用不同浸提溶剂对两种类型的药用卤化丁基胶塞进行浸提,对其相容性进行研究,为卤化丁基胶塞使用安全性提供支持。方法参考YBB00042005《注射液用卤化丁基胶塞》、YBB00142002《药品包装材料与药物相容性试验指导原则》、EMEA:《GUIDELINE ON PLASTIC IMMEDIATE PACKAGING MATERIALS》、FDA:《Container Closure Systems for Packaging Human Drug and Biologics》、FDA:《Stability Testing of Drug Substances and Drug Products》、PDA:《Technical Report No.5,Sterile Pharmaceutical Packaging:Compatibility and Stability》、《中国药典》2010年版、《欧洲药典》第7版、USP〈381〉。结果与结论两种卤化丁基胶塞浸提试验结果较好,相容性结果可接受,为制药企业选择卤化丁基胶塞提供参考。

Studies on the Allelopathic Potential of Corn （Zea mays L.） Aqueous Extracts and Root Exudates

This investigation was carried out at Faculty of Agriculture and Forestry-University of Duhok/Kurdistan-Iraq. Three experiments were included in this investigation： （1） First experiment was a bioassay related to the germination performance, shoot and root development of corn （Zea mays L.） and peanut （Arachishypogaea） at two concentrations of root （3% and 1.5%） and shoot （12% and 6%） aqueous extracts of corn medium; （2） The second experiment dedicated to the intercropping of corn and peanut at four treatments; （3） While the third experiment involved the effect of peanut root exudation on growth of corn. Experiment results revealed that corn shoot and root water extracts highly inhibited seed germination of both corn and peanut, the inhibitory of shoot extract was more than root aqueous extract. While its effect on the seedling growth was vice versa as compared with control treatment, there was an increase in root and shoot length of both corn and peanut when grown in corn aqueous extracts. Intercropping experiment results has stimulated most traits of peanut under studying. Also for corn, there was apparent and significant increase in all characteristics as compared with control. It was further confirmed from the results of peanut root exudates that had all studied characters of corn were stimulated than the control treatment.

Optimization of Extracting Technology for Essential Oil from Elsholizia densa Benth

[Objective] The study aims to optimize the extracting technology conditions of essential oil from Elsholtzia densa Benth. [Method] Essential oil was extracted from E. densa Benth using steam distillation, and the effects of four extracting factors (grain size of the medicinal herb, ultrasonic time, soaking time and ratio of the material to liquid) on the yield of essential oil extracted from E. densa Benth were analyzed through the orthogonal test. [Result] The optimized extraction process of essential oil from E. densa Benth was as follows: grain size of the medicinal herb 50 mesh, ultrasonic time 12 min, being soaked in the water for 6 h, and ratio of the material to liquid 1∶16 g/ml. Under the conditions, the average extracting rate of the essential oil was 0.407%. [Conclusion] The optimized extraction process of essential oil from E. densa Benth was simple and practicable, and its extracting rate was higher.

评价医疗器械体外细胞毒性的常用方法概述

医疗器械和材料应用于临床之前需要进行生物相容性评价。国内外均将细胞毒性试验列在生物相容性评价的首位。细胞毒性试验分为三大类:浸提液试验、直接接触试验和间接接触试验。文章将对三种细胞毒性试验的核心要素和主要步骤加以介绍,并对三种细胞毒性试验的敏感性特点及相互关系加以概述。