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平安中原(河南省公安厅官方微博):【荥阳枯河河水如墨村民邀官员游泳】荥阳枯河,曾经是沿岸百姓的美好回忆,如今却漆黑如墨。百姓饱受河水污染之苦,用河水灌溉的庄稼只外卖从来不吃。为此,沿岸百姓呼吁负责的官员下河游泳。荥阳市环保局相关人士称,枯河水黑是因为正在治理,但可以保证     

仅有“官员下河游泳”标准远远不够

治理河道污染不仅需要明确责任,更需要科学理性。近十多年来,温州市历届政府均有发出治理温瑞塘河呼声,然成效不大,污染依旧。究其原因,很可能是雷声大于雨点;号召大于行动;作秀大于实招。     

元首们的健康生活

布莱尔:狂爱足球的健将英国首相布莱尔一直是一名活跃的"体育健将".中学时代,他是非常出色的校橄榄球队队员,还当过校板球队队长,以后又对篮球和网球颇感兴趣.做首相后,虽然工作繁忙,但布莱尔仍然定期游泳、打网球、上健身房.很多时候,布莱尔一家还要同保镖们拉开架势,来一场别开生面的"家庭足球大赛".如此注重锻炼,难怪布莱尔自豪地表示,他现在的身材跟大学刚毕业时一样标准.     

氯化混凝法抑制游泳池藻类生长

在大量实验基础上采用氯化混凝方法抑制游泳池水中藻类生长，结合游泳池处理工程实践，筛选出最佳投药方式，用量。     

Cancer risk assessment from exposure to trihalomethanes in tap water and swimming pool water

We investigated the concentration of trihalomethanes （THMs） in tap water and swimming pool water in the area of the Nakhon Path- om Municipality during the period April 2005-March 2006. The concentrations of total THMs, chloroform, bromodichloromethane, dibromochloromethane and bromoform in tap water were 12.70-41.74, 6.72-29.19, 1.12-11.75, 0.63-3.55 and 0.08-3.40 μg/L, respectively, whereas those in swimming pool water were 26.15-65.09, 9.50-36.97, 8.90-18.01, 5.19-22.78 and ND-6.56 μg/L, respectively. It implied that the concentration of THMs in swimming pool water was higher than those in tap water, particularly, brominated-THMs. Both tap water and swimming pool water contained concentrations of total THMs below the standards of the World Health Organization （WHO）, European Union （EU） and the United States Environmental Protection Agency （USEPA） phase Ⅰ, but 1 out of 60 tap water samples and 60 out of 72 swimming pool water samples contained those over the Standard of the USEPA phase Ⅱ. From the two cases of cancer risk assessment including Case Ⅰ Non-Swimmer and Case Ⅱ Swimmer, assessment of cancer risk of nonswimmers from exposure to THMs at the highest and the average concentrations was 4.43×10^-5 and 2.19×10^-5, respectively, which can be classified as acceptable risk according to the Standard of USEPA. Assessment of cancer risk of swimmers from exposure to THMs at the highest and the average concentrations was 1.47×10^-3 and 7.99×10^-4, respectively, which can be classified as unacceptable risk and needs to be improved. Risk of THMs exposure from swimming was 93.9%-94.2% of the total risk. Cancer risk of THMs concluded from various routes in descending order was： skin exposure while swimming, gastro-intestinal exposure from tap water intake, and skin exposure to tap water and gastro-intestinal exposure while swimming. Cancer risk from skin exposure while swimming was 94.18% of the total cancer risk.     

蚤状潘在4种毒物胁迫下的运动行为变化研究

文章研究了蚤状溞在4种毒物(Cu~(2+)、Cd~(2+)、三唑磷、莠去津)胁迫下游泳速度、高度、间距以及轨迹等行为参数的变化规律,发现蚤状溞在受到毒害后,其运动行为会发生显著变化:具体表现为蚤状溞的游泳速度在1 h内增加到一个峰值后逐渐下降;除莠去津之外,蚤状溞在其他3种毒物胁迫下的运动高度均受到了抑制;在毒物的胁迫下,蚤状溞均出现了聚集现象;游泳轨迹在高浓度毒物胁迫下波动幅度加大,呈现紊乱状态。在同一毒物不同浓度胁迫下,运动行为响应时间不同,但行为的变化趋势相似。实验表明,与传统溞类生物毒性测试相比,用运动行为变化来监测水质能缩短预警时间50%以上,明显提高预警效率。     

冬季长江口渔场游泳动物群落种类组成和多样性的年代际变化

根据1991—2011年间3个代表年冬季长江口渔场的调查数据,对该海域游泳动物群落的年代际变化进行了研究。结果表明：1991—2011年,游泳动物种类数总体表现为升高的趋势,其中鱼类的增加幅度较小,甲壳类和头足类的增加幅度较大。以重量和尾数为代表的资源密度指数均表现出先下降后升高的趋势。平均体重先呈现急剧下降然后继续小幅下降的趋势。1991年优势种类数为7种,2001年为9种,2011年为7种,后2个年份和1991年相比,优势种发生了较大的更替。细点圆趾蟹（Ovalipes punctatus）和龙头鱼（Harpadon nehereus）为3个年份的共同优势种。游泳动物的站位平均种类数呈现持续升高趋势,而站位平均丰富度指数、多样度指数和均匀度指数则呈现出先升高再降低的趋势。1991和2001年、1991和2011年之间的平均相异性较高,均超过60%,而2001和2011年之间的平均相异性较低,为36.05%;引起群落差异的主要种类数呈增加的趋势,生态类群也逐渐扩大。游泳动物长度谱呈现逐渐变窄的趋势,主要是由于群落中的生物种类演替、小型鱼类数量增多和大型鱼类的群体年龄结构降低等原因造成的。