我校学生体育行为的调查研究

本文通过对我校03、04级学生的问卷调查，就我校学生的体育兴趣、体育课现状的态度、学校体育设置地满意程度、对教师工作的满意度等方面进行了调查分析；同时也对学生的体育行为进行了分析；并在调查研究的基础上对我国高校的体育指导思想和体育教学形式进行了反思，提出了以学生为本设计高校体育的教学形式及内容。     

拯救天堂雨林

5月初,刘芳又回到了这个“人又多又吵”的北京.一个月的雨林生活让她感觉恍如隔世,但在雨林中留下的各种淤青伤痕和蚊虫叮咬的痕迹,依旧勾起了她对那个真实的雨林世界的牵挂.     

银硫离子选择电极测定工业废水中的硫化物

本法用Ag/S离子选择电极测定废水中的硫化物,测定浓度范围0.1～1000.0mg/l,方法精密度为4.3％,回收率为P2.5％,检出限为0.1mg/l。大多数离子不干扰测定,该法简便快速,适用于例行监测。     

Prenatal diagnosis of congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency by steroid analysis in the amniotic fluid of mid-pregnancy: Comparison with HLA typing in 17 pregnancies at risk for CAH

Amniotic fluid (AF) levels of 17-hydroxyprogesterone (17OHP) and testosterone (T) were determined at 16–17 weeks in 17 pregnancies at risk for CAH and results compared to 75 normal controls. The fetus was predicted to be unaffected in 12 cases on the findings of normal AF levels of both 17OHP and T and the latter allowed a correct prediction of fetal sex in all instances. HLA typing confirmed normality in 12 cases revealing 5 carriers, 5 homozygous normal and 2 indeterminate. Steroid levels of the 2 groups were similar. Three fetuses were predicted to be CAH affected on unambiguously high levels of 17OHP and T (in female only). HLA typing was in agreement, and the diagnosis was confirmed in 2 abortuses and a female newborn by physical and hormonal studies. In the last 2 cases AF levels of OHP and T were normal but HLA (A/B/C) genotypes were identical to the CAH affected siblings. Normal physical and hormonal findings in the 2 aborted fetuses would exclude the possibility of an in utero virilizing form of CAH. The discrepancy could be explained on the basis that the fetuses had an allelic form of 21-hydroxylase deficiency or on the basis of recombination (not fully tested). It is concluded that a fully informative prenatal diagnosis of CAH should not rely entirely on HLA typing but on hormonal studies.     

炼厂含油水罐事故分析与防范措施研究

炼化企业中有大量含油水罐,这些储罐中含硫、含油,固有风险很高,事故频发,有必要对各类污水罐事故进行分析和研究,找出共性的问题,提出解决方案和事故防范对策。通过对所搜集到的2009-2012年发生的36起含油水罐事故,从储罐类型、事故类型、点火源、操作阶段等方面进行统计分析,对案例进行深入剖析,找出了污水罐在设计、设备防腐以及操作管理中存在问题,并针对问题提出了相应的建议措施。     

Insights into reactive oxygen species formation induced by water-soluble organic compounds and transition metals using spectroscopic method

Ambient particulate matter (PM) can cause adverse health effects via their ability to produce Reactive Oxygen Species (ROS). Water-Soluble Organic Compounds (WSOCs), a complex mixture of organic compounds which usually coexist with Transition Metals (TMs) in PM, have been found to contribute to ROS formation. However, the interaction between WSOCs and TMs and its effect on ROS generation are still unknown. In this study, we examined the ROS concentrations of V, Zn, Suwannee River Fulvic Acid (SRFA), Suwannee River Humic Acid (SRHA) and the mixtures of V/Zn and SRFA/SRHA by using a cell-free 2′,7′-Dichlorodihydrofluorescein (DCFH) assay. The results showed that V or Zn synergistically promoted ROS generated by SRFA, but had an antagonistic effect on ROS generated by SRHA. Fluorescence quenching experiments indicated that V and Zn were more prone to form stable complexes with aromatic humic acid-like component (C1) and fulvic acid-like component (C3) in SRFA and SRHA. Results suggested that the underlying mechanism involving the fulvic acid-like component in SRFA more tending to complex with TMs to facilitate ROS generation through π electron transfer. Our work showed that the complexing ability and complexing stability of atmospheric PM organics with metals could significantly affect ROS generation. It is recommended that the research deploying multiple analytical methods to quantify the impact of PM components on public health and environment is needed in the future.     

表面活性剂对分枝杆菌KR2生长的影响

研究了表面活性剂的浓度、离子类型和分子结构等对分枝杆菌KR2菌株生长的影响。结果表明，一些表面活性剂在低浓度时可以促进分枝杆菌KR2的生长，高浓度时则会抑制KR2菌株的生长。表面活性剂的离子类型对KR2菌株生长抑制作用的顺序为：阳离子活性剂TDTMA＞阴离子表面活性剂LAS＞非离子表面活性剂Tween80。表面活性剂的直链长度对KR2菌株生长的影响为：直链越短，对分枝杆菌KR2菌株生长的抑制作用越大。     

绿色食品产地土壤中总砷的测定

文章采用硝酸-盐酸混合试剂热消解,氢化物发生原子荧光法-定绿色食品产地土壤中总砷.方法的检出限为0.0107mg/kg,相对标准偏差为1.4%,加标回收率为97.8%～102%之间.     

载La(Ⅲ)-和Fe(Ⅲ)-氨基膦酸型螯合树脂对氟吸附性能的比较

研究并比较了载La（Ⅲ）和载Fe（Ⅲ）大孔氨基膦酸型螯合树脂对饮用水中氟离子的吸附特性。氟在载La（Ⅲ）和载Fe（Ⅲ）的螯合树脂上的吸附不随pH的变化而改变,载金属螯合树脂对氟的饱和吸附容量分别为3.78、3.55mg/g,吸附方式符合Freundlich吸附等温式,代表性竞争离子不影响氟在螯合树脂上的吸附。结果表明载Fe（Ⅲ）和载La（Ⅲ）的螯合树脂是一种有前景的饮水氟去除吸附剂。     

建立能够体现化工行业特点的行业排放标准初探

化工行业具有传统的工业类型和新兴产业交叉渗透的特点。现有的污染物排放标准因涵盖行业过多、细化内容不够、可操作性不强、行业特点不突出,故不太适应化工行业的发展,建立新的化工行业污染物排放标准势在必行。文章概要介绍了我国现有污染物排放标准,分析了美国、欧盟、日本、德国等一些国家和组织的排放标准,提议建立能够体现化工行业特点的行业排放标准,以达到淘汰落后工艺和促进清洁工艺的目的。