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[目的]建立快速、准确地测定中药材中汞和砷含量的方法.[方法]微波消解处理样品,流动注射-氢化物发生-原子吸收法检测.[结果]汞在0.002 mg/L~0.02 mg/L浓度范围内线形良好,检出限为0.0004mg/L;砷在0.02 mg/L~0.16 mg/L浓度范围内线形良好,检出限为0.001mg/L,相关系数均大于0.99990;汞的回收率在85.0%~93.8%,砷的回收率在89.4%~102.0%,相对标准偏差分别为5.5%和4.1%.[结论]该方法省时、节能、准确度高. 相似文献
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“检科Ⅰ号”消毒剂抑制体内外鸡球虫发育的研究 总被引:1,自引:0,他引:1
[目的]探讨"检科1号"消毒剂对鸡球虫的抑制作用.[方法]用1∶19"检科Ⅰ号"消毒剂在体外与柔嫩艾美耳球虫(Eimeria tenella)BJ株卵囊分别作用10min、20min、30min和60min,观察孢子化率;将消毒剂作用1h以及未经消毒剂处理的卵囊分别感染14日龄的AA肉鸡后,用"检科Ⅰ号"消毒剂进行带鸡消毒(1∶30舍内超低容量喷雾消毒,同时1∶150或1∶300饮水消毒),对感染后144~168h之问排出的粪便进行克粪便卵囊计数,168h对鸡只称重,屠宰后对盲肠病变记分.[结果]作用10min和60min的卵囊孢子化率分别为67.01%(P<0.05)、63.99%(P<0.01),比空白对照76.45%的孢子化率低;带鸡消毒对各组鸡感染球虫后的增重无明显影响,且能够抑制球虫在鸡体内的发育,减轻肠道病交,减少粪便中球虫卵囊的排出量.[结论]"检科Ⅰ号"消毒剂能抑制鸡球虫的体内外发育. 相似文献
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再论中国体育制度改革的取向 总被引:2,自引:0,他引:2
中国体育事业的进一步发展需要以对传统体育管理体制的改革作为前提。由于体育事业在社会生活系统中的特殊地位及其本身的多功能、多属性特征 ,决定了它的改革取向是多因素综合作用的结果 ,并呈现出层次区分。同时 ,应坚持体育事业的经济效益和社会效益的统一。 相似文献
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梁某与陈某均系上海某电器有限公司股东,梁某持有50.51%的股权,陈某持有8.744%的股权。2006年12月,梁某与陈桌签订《公司内部股权转让合同》,陈某将其持有的全部股权转让给梁某,转让价格为25万。梁某另外承担税金3万元。同月,梁某付清了全部款项。其后,梁某要求陈某办理变更登记手续,但陈某此时拒绝办理变更登记,要求撤销《公司内部股权转让合同》。梁某不同意,故以陈某与上海某电器有限公司为被告诉至法院,要求确认与陈某签订的合同合法有效,并要求陈某办理股权变更手续。 相似文献
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知识经济是建立在知识和信息的生产、分配和使用基础之上的经济形态。文章阐述了知识经济条件下 ,全球服务业发展的新趋势 ,分析了中国服务业存在的问题 ,提出了中国迎接知识经济挑战、发展服务业的对策思路。 相似文献
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The purpose of the study was to investigate the effect of fibre content and method of application of selected interfacing fabrics on appearance of garments after repeated laundering. Experimental fabrics were three interfacings of 100% polyester sew-in, 100% rayon and 100% polyester fusible, and two white fashion fabrics of polyester/cotton durable press treated and 100% cotton. Thirty blouses were constructed and divided into six groups representing six combinations of fashion and interfacing fabrics. Evaluation methods included appearance, dimensional stability and stiffness. Data were statistically analysed using t tests and Pearson rank order correlation coefficient. Results showed that method of applying interfacing fabrics had a significant effect on appearance of the combined fashion and interfacing fabrics. Sew-in method resulted in satisfactory appearance throughout repeated laundering for polyester/cotton DP fabric. Deterioration of adhesive resin of fusible interfacings in the laundering process resulted in significant shrinkage and poor appearance. Also, relationship was found between per cent shrinkage and appearance ratings indicating that as per cent shrinkage increased, appearance ratings decreased. Effect of fibre content of interfacings on appearance was not significant. However, interfacing fabrics were found to be the major contributor to shrinkage of composite fabric and not the fashion fabrics. Poor appearance of fusible interfacings was related also to per cent loss of stiffness. 相似文献
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我国文化遗产地旅游开发中存在盲目兴建旅游基础设施、盲目追求游客数量增加,对文物建筑和遗产地造成了不同程度的损害。为了保护世界遗产不受旅游开发和经营服务活动的损害,需要从管理体制、人才培养、坚持功能分区等方面制定相应的对策。 相似文献
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The purpose of this study was to investigate the bleaching efficiency of activated sodium perborate at low washing temperatures and the resulting energy saving. The comparison of the washing efficiency of basic and activated detergent was based on practical washing tests. The types of dirt used were coffee, fruit juice, tea, blood and a soot-oil mixture. The washing temperatures were 50, 60, 70 and 80°C. The cleanness of the washing was determined by a whiteness measurement. The consumption of electrical energy was measured with a kWh-meter. The higher the temperature, the more effectively all the types of dirt were removed from the textiles. With activated detergent a cleanness was obtained at 50°C and 60°C that was almost as good as with basic detergent at 80°C. The coloured types of dirt washed out more easily than blood or the soot and oil mixture. An average saving of 20% in the consumption of energy was obtained when the washing temperature was lowered by 10°C. With activated detergent, 45% of the energy consumed using basic detergent was saved with no reduction in the final cleanness. 相似文献
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本刊第四期刊发的《有限责任公司股东能否对部分股权行使“有限购买权”?》一文,颇受读者关注,有读者反映读了此文很受启发。近来,我国证券市场十分活跃,作为一种特殊形态的有限责任公司的股权继承,较一般的股权转让更为复杂,部分股民对此的“认知度”往往高,有的甚至模糊不清。本期“经济与法”特刊发施剑蓉《股东资格可以依法继承吗?》一文,希望对读者有所帮助。[编者按] 相似文献
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振兴东北老工业基地被作为一项国策提出来, 从中央到地方都给予了极大关注。振兴东北老工业基地实质上是实现东北经济区重新大发展。为更好地服务于这次经济转型战略, 向“服务型政府”转变是今后政府改革的必然选择。服务型政府的角色主要包括: 为东北老工业基地的产业调整提供政策导向、提升生产要素的质量、提供经济增长的基础设施与社会保障支持。 相似文献