亚硫酸锌渣锌电解废液解析工艺流程的改进实践

文章描述了使用锌电解废液对亚硫酸锌渣进行酸分解的工艺流程改进实践。     

Modulation of convulsive threshold of pentylene tetrazole by zinc

In the present study which was aimed to see the effect of zinc on pentylenetetrazole induced convulsive threshold in rats we found that zinc sulfate 100 μg intracerebroventricularly) and pentylenetetrazole (50 mg/kg intraperitoneally) produced dose related seizure activity; however, pretreatment with zinc decreased the threshold, increased the severity, incidence of multiple seizures and total duration of pentylenetetrazole induced seizures. Diazepam (5 mg/kg intraperitoneally) pretreatment increased the threshold and lowered the incidence of convulsions in zinc induced seizures which further confirms that the convulsive effect of zinc is through inhibition of gamma aimino butyric acid.     

Serum and urinary zinc in zinc miners and zinc smelters

Serum (200.6±64.8 mg/dl) and urinary zinc (1186.0±265.5 mg/l.) of zinc miners at Zawar were significantly higher as compared to zinc smelter workers (Serum 89.7±9.9. mg/dl; Urine 590.0±32.1 mg/l.). Debari and Udaipur residents (Serum 104.0±18.6 mg/dl; Urine 735.0±180.2 mg/l.). This was most likely attributable to higher dietary zinc intake by zinc miners due to higher zinc content of foodstuffs grown in Zawar areas as compared to Debari and Udaipur.     

氯化铵对顺铂诱导A549细胞凋亡的形态学研究

目的探讨氯化铵(NH4CL)对顺铂(cisplatin,CDDP)抑制A549细胞增殖的影响。方法体外培养人肺癌A549细胞,MTT法检测NH4CL及CDDP对人肺癌A549细胞增殖率的影响;光镜下观察NH4CL及CDDP对A549细胞生长的影响;共聚焦显微镜下观察A549细胞核的形态变化。结果与对照组相比,给予不同浓度的NH4CL及CDDP导致A549细胞增殖率明显下降;光镜下观察A549细胞经非毒性剂量的NH4CL与CDDP联合应用处理后细胞生长抑制明显高于单独给予CDDP组;共聚焦显微镜观察可见非毒性剂量的NH4CL与CDDP联合应用处理A549细胞核碎裂现象明显多于单独CDDP处理组。结论 NH4CL可以促进CDDP对A549A细胞的凋亡诱导作用。     

全球锌消费及需求预测与中国锌产业发展

本文以全球10多个典型发达国家近100年的锌消费历史为研究基础,按锌消费特征分为两类国家：①美国、日本等国家,主要消费在建筑和基础设施领域;②德国、意大利等国家,主要应用于机械制造、电子等行业,都具有“S”形消费规律。在此规律基础上,将全球分为不同发展阶段的4类国家集团,对全球锌需求进行预测。预测结果显示：未来全球锌需求将持续增长,但增速将放缓,主要发达国家需求将逐步减少,中国需求已经进峰值区,全球锌需求增长点将转向印度和东盟。