抗菌洗液杀菌效果及毒性实验研究

目的研究以有效碘为主要成分的抗菌洗液的杀菌效果和毒性。方法采用悬液定量杀菌实验及动物毒性实验,对该抗菌洗液杀菌效果及毒性进行实验观察。结果以含500 mg/L有效碘的抗菌洗液作用1.5 min,对悬液内的大肠埃希菌、金黄色葡萄球菌、铜绿假单胞菌的平均杀灭率均>99.99%;对白色假丝酵母菌作用1.5 min,平均杀灭对数值均>99.99%;将抗菌洗液于37℃存放90 d,有效碘的下降率为4.15%;小鼠急性经口LD50值>5000 mg/kg,抗菌洗液原液对家兔皮肤刺激实验指数为0,属于无刺激性。结论该抗菌洗液性能稳定,对细菌繁殖体有良好的杀菌效果,属无毒无刺激性洗液。     

Comprehensive biological effects of a complex field poly-metallic pollution gradient on the New Zealand mudsnail Potamopyrgus antipodarum (Gray)

The Lot River is known to be contaminated by metals, mainly cadmium and zinc, due to a former Zn ore treatment plant in the watershed of the Riou-Mort, a tributary of the Lot River. Many studies have been performed to characterize contamination, but few have assessed its consequences on the biological responses of organisms along the gradient. We exposed adult and juvenile New Zealand freshwater mudsnails Potamopyrgus antipodarum at several sites along the gradient of metal contamination for 28 days. Biological responses were monitored at different levels: individual (survival, growth and fecundity), tissue and biochemical (energy status and vertebrate-like sex steroid levels) to better understand the toxicity mechanisms involved. Accumulation of Cd and Zn was high during exposure. Most of the biological effects observed could be linked to this contamination and were concentration-dependent. Histological lesions of the digestive gland were observed, with hypertrophy of calcium cells and vacuolization of digestive cells. Such effects are likely to explain the decrease of energy status (triglycerides and proteins), juvenile growth and adult fecundity observed at the most polluted site. However the magnitude of the fall in fecundity cannot be attributed only to these tissular effects, indicating another mode of action of Cd or possible confounding factors. Steroid accumulation in snails indicated only organic pollution. Histopathological effects proved the most sensitive endpoint to metal (Cd and Zn) contamination.     

正交试验法优选丁香叶中原儿茶酸的提取工艺

目的：优选丁香叶中原儿茶酸的最佳提取工艺。方法：以原儿茶酸为评价指标成分,采用高效液相色谱法测定丁香叶中原儿茶酸的含量,并用L9（3^4）正交试验法考察加水量、提取时间、提取次数等因素的影响,优化提取条件。结果：最佳提取工艺为加20倍量水,1.5h提取2次,70%醇沉24h后乙酸乙酯萃取。结论：优选得到的工艺稳定、合理、可行。     

纳豆提取物的保湿性、抗过敏性和亚硝酸盐清除率的初步研究

近年来在外用美容药物和化妆品的透皮吸收研究中,高度生物靶向性和严格选择的生物导向制剂的研究开发十分引人注目。以γ-聚谷氨酸作为研究对象,验证它是否具有保湿、抗过敏以及对于亚硝酸盐的清除作用,对于开发透皮制剂具有重要意义。本实验通过3方面研究纳豆提取物的性质。在实验条件下,低浓度的纳豆提取物溶液保湿率均较低,具有明显的抗过敏性和对NaNO2的清除的作用。     

火针对脊髓损伤模型大鼠凋亡细胞的影响

目的:观察火针改善脊髓损伤大鼠凋亡细胞的表达情况,为临床治疗脊髓损伤提供实验依据。方法:本研究以随机对照法进行动物分组,采用改良的Allen s法制备脊髓损伤模型,以火针、毫针分别进行干预,采用TUNEL法观察大鼠凋亡细胞的变化。结果:治疗手段干预后,与模型组比较,火针组、毫针组72 h、1 w的细胞凋亡表达存在显著性差异(P<0.05)。结论:火针能较好的减少脊髓损伤大鼠凋亡细胞的表达数量。     

抗肿瘤胶囊提取工艺研究

目的:优选中药抗肿瘤胶囊的提取工艺.方法:采用L9(34)正交试验,以柚皮苷为指标对抗肿瘤胶囊的提取工艺进行优选.结果:抗肿瘤胶囊的最佳提取工艺为加水10倍量,提取2次,每次2 h.结论:优选得到的提取工艺合理,操作可行,质量可控.     

正交试验法优选痛经颗粒水提工艺

目的:优化痛经颗粒中芍药苷的最佳提取工艺.方法:以白芍中芍药苷的提取率和浸膏得率为指标,采用L9(34)正交试验法优选痛经颗粒中芍药苷的最佳提取工艺.结果:优选的最佳提取工艺为:第1次加10倍量的水,煎煮1.5 h,第2次加8倍量的水,煎煮1.5 h,第3次加6倍量的水,煎煮0.5 h.结论:该水提工艺设计合理,芍药苷...     

盘龙参中总黄酮提取工艺研究

目的：研究盘龙参中总黄酮的提取工艺。方法：采用紫外分光光度法从超声提取法、回流提取法、索氏提取法中选出最优提取方法,在此基础上进一步探讨乙醇浓度、时间、固液比,提取级数等因素对总黄酮含量的影响。结果：回流提取法所得总黄酮的含量较高,单因素试验设计得出优化实验条件为：乙醇浓度为75％,提取时间为3h,固液比为1：40（g／mL）,提取次数为1次。结论：该优选方法合理,可行。     

正交试验设计优化杜仲总黄酮提取工艺

目的:筛选出提取杜仲总黄酮的最佳工艺。方法:采用L9(34)正交试验设计,以提取时间、乙醇浓度、溶媒用量、提取次数为因素,采用紫外分光光度法对杜仲总黄酮含量进行检测,确定最佳提取条件。结果:最佳提取工艺为乙醇85%,溶媒用量16倍,提取90min,提取1次。结论:杜仲总黄酮提取工艺的优化,为其进一步研究提供参考。     

肝纤维化血清标记物检测分析

目的：通过对肝病患者肝纤维化血清标记物测定分析,找出有助于肝纤维化诊断的实验指标.方法：采用酶联免疫吸附试验方法,测定肝病患者血清中HA、LN、CⅣ、PCⅢ的含量.结果：HA、LN、CⅣ、PCⅢ的含量随着病情发展而升高.结论：血清HA、LN、CⅣ、PCⅢ的联合检测有助于硬化的诊断和治疗.