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长期低氧环境暴露对人体声光反应时间的影响 被引量:7
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作者 谢新民 谢黎 +1 位作者 文亚兰 吴英 《中国热带医学》 CAS 2007年第11期2011-2012,2041,共3页
目的以单纯及多重声光选择反应时间为指标,探讨脑内信息处理过程在长期高原低氧环境下是否受到低氧干扰对反应时间的影响。方法实验组为10名在海拔4500m低氧环境暴露两年的男性战士,对照组为10名一般正常男性。受试者接受常氧(20.95%)16... 目的以单纯及多重声光选择反应时间为指标,探讨脑内信息处理过程在长期高原低氧环境下是否受到低氧干扰对反应时间的影响。方法实验组为10名在海拔4500m低氧环境暴露两年的男性战士,对照组为10名一般正常男性。受试者接受常氧(20.95%)16%、13%及10%等浓度的常压低氧处理后,进行声光选择反应时间测试。结果对照组单一选择声光反应时间及多重选择声光反应时间在低氧环境下均有增加的趋势,单一选择光反应时间,在10%氧浓度与常氧状态差异性有统计学意义(P<0.05);实验组不受低氧影响而对声光选择反应时间产生显著干扰,但经过长期高山低氧环境暴露后,反应时间与对照组已有显著性差异(P<0.05)。结论脑部光反应时间的功能,易受低氧干扰。 展开更多
关键词 低氧暴露 反应时间 声反应时间 信息处理
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Research on Algae Removal by Ultrasonic and Jet Combined Process
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作者 L.P. Wang L. Lu +2 位作者 X. Xu Y.Z. Chen N.Y. Gao 《Journal of Environmental Science and Engineering》 2010年第3期21-24,共4页
Ultrasonic and jet combined process was studied to remove determined by static experiments, and stability of this combined process algae in lake type raw water. The optimum reaction time was was checked by dynamic exp... Ultrasonic and jet combined process was studied to remove determined by static experiments, and stability of this combined process algae in lake type raw water. The optimum reaction time was was checked by dynamic experiments. The results was showed that ultrasonic/jet combined process has excellent removal efficiency on algae in lake type raw water, and it's a simple operation, and has no secondary pollution. When the pH, temperature, chlorophyll-a(Chl-a) and cell concentration(OD560) of raw water are 7.69, 25.8 ℃, 29.003 mg/m^3 and 0.091, the average removal efficiency on Chl-a and OD560 are 81.60% and 80.22%, respectively, which are stable by this combined process when it is operating in 36 hours, and samples are analyzed each 4 hours. 展开更多
关键词 ULTRASONIC JET lake type raw water algae.
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