共查询到18条相似文献,搜索用时 156 毫秒
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本文系统阐述了国内外辛醇生产中有机废水处理方法,对各种处理方法进行对比分析,建议工业化采用酸化萃取法,并介绍废水处理的最新进展情况. 相似文献
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介绍了丁基橡胶的生产方法,分析了国内外丁基橡胶的生产消费现状及市场前景,提出了发展我国丁基橡胶生产的一些建议. 相似文献
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评述了世界和中国甲乙酮的技术进展,包括世界主要生产技术、中国技术进展和生物制造工艺;对世界和中国的甲乙酮市场进行分析。 相似文献
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2-氯-5-甲基吡啶是生产吡虫啉、吡氟禾草灵等高效、低毒、低残留新农药的关键中间体。综述了2-氯-5-甲基吡啶的7种主要合成方法:3-甲基吡啶氧化法、3-甲基吡啶一步氯化法、重氮化法、熔融盐法、苄胺环合法、环化法及吡啶酮法,并简单介绍了2-氯-5-甲基吡啶在农药和生物化学品合成中的应用、研发现状及发展趋势。 相似文献
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本文建立了同时测定欧盟高关注物质(SVHC)第23批新增的4种物质[1-乙烯基咪唑、-甲基咪唑、4-羟基苯甲酸丁酯、双(乙酰丙酮酸)二丁基锡的气相色谱质谱联用仪(GC-MS)]的检测方法。将样品用二氯甲烷超声后,采用选择离子监控模式(SIM)进行分析样品中的待测物。实验结果表明,4种物质在50 mg/L范围内线性关系良好,线性相关系数为0.995以上;样品加标回收率为94%110%,相对标准偏差(RSD)小于7%;方法检出限分别为2 mg/kg、10mg/kg、0.8 mg/kg、0.6 mg/kg,解决了欧盟新增加的4种SVHC测试问题。 相似文献
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Exploring the simultaneous effects of key variables on the unhealthy consumption behavior of adolescents, two studies focused on the relative effects of advertising, parental and peer influence, and self-efficacy on adolescent tobacco use and alcohol consumption. The results suggest that (1) advertising effects are largely neutralized by parental and peer influence; (2) peer and parental influence strongly predict adolescent tobacco use and alcohol consumption; and (3) self-efficacy is a weak predictor of both adolescent risk behaviors. 相似文献
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《International journal of injury control and safety promotion》2013,20(4):265-266
Objective. To assess acute alcohol intoxication among patients presenting with recent injuries at trauma units in Cape Town, Port Elizabeth and Durban from 1999 to 2001. Design. Cross-sectional surveys were conducted during a four-week period in each of the above sites in 1999, 2000 and 2001. The concept of an ‘idealised week’ was used to render representative samples. Breath-alcohol concentrations were assessed in a total of 1900 patients using a Lion SD2 alcolmeter. Results. Over half of all the patients experienced violent injuries. Across sites and for each respective year of the survey, between 35.8% and 78.9% of patients tested positive for alcohol. Between 16.5% and 67.0% had a breath-alcohol concentration greater than or equal to 0.05g/100ml. Port Elizabeth consistently had the highest proportion of patients testing positive for alcohol. Patients injured as a result of violence were more likely to test positive for alcohol than patient who sustained road traffic or other unintentional injuries. Conclusions. Alcohol involvement among trauma patients remained consistently high for each of the three study periods. Efforts to combat the abuse of alcohol would appear to paramount in reducing the burden of injuries on health care services. 相似文献