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外毛细胞电致运动的分子基础 被引量:2
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作者 张倩 潭晓东 +1 位作者 贾淑萍 何志洲 《中华耳科学杂志》 CSCD 2009年第1期105-108,共4页
哺乳类动物对外界刺激声信号的高度精确的分辨产生于它们的耳蜗内感音器官的机械放大机制,其增益可达数千倍之多。这个增益值在小刺激声强时最大,但随着刺激声强的增强而渐减小。1983年Davis首先提出了耳蜗放大器的概念(cochlear amp... 哺乳类动物对外界刺激声信号的高度精确的分辨产生于它们的耳蜗内感音器官的机械放大机制,其增益可达数千倍之多。这个增益值在小刺激声强时最大,但随着刺激声强的增强而渐减小。1983年Davis首先提出了耳蜗放大器的概念(cochlear amplifier)。耳蜗放大器也称耳蜗主动过程(active process),是指内耳将低强度声音信号进行机械放大的一系列过程,具体说就是指毛细胞通过某种形式的运动以反馈机制影响听觉感受器局部的机械振动.从而使微弱的声音刺激信号得以放大。 展开更多
关键词 分子基础 运动 细胞电 机械振动 声音信号 哺乳类动物 听觉感受器 刺激信号
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Study on Relationship between Carbon Disulfide Exposure and Symptoms and Signs of Nervous System in Workers
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作者 毕勇毅 陶宁 +3 位作者 潭晓东 王福元 李阳 苏拥军 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 1999年第4期280-284,共5页
The relationship between carbon disulfide (CS2) and the symptoms and signs of nervous system in rayon workers was investigated. In a cross sectional study of CS2-exposed workers from the viscose industry and controls,... The relationship between carbon disulfide (CS2) and the symptoms and signs of nervous system in rayon workers was investigated. In a cross sectional study of CS2-exposed workers from the viscose industry and controls, data on neurological symptoms and clinical neurological examination were evaluated. Theexposed subjects includes 326 workers and 105 workers from the same factory,without exposure to CS2 or to any other neurotoxic agents, served as controls.The median exposure to CS2(8 h time weighted) in the low-level exposure group was 4. 6 mg/m3, and 18. 3 mg/m3 in high-level exposure group. Non-conditional multiple logistic regression analysis was employed for evaluating statistical differ-ences by using SAS software. In the analysis, age, sex, work time, body massindex (BMI), smoking and drinking habits, educational background and marriage status were controlled. The odds ratio (OR) significantly increased of some symptoms in workers exposed to CS2 at levels below 10 mg/m3, as compared to con-trols. The dose-effect relationship between the exposure to CS2 and the symptoms of nervous system was demonstrated. In terms of neurological parameters, no other abnorrnal change but that in temperature sensitivity was observed in work-ers exposed to CS2. In conclusion, the influence of low level CS2 on nervous system of workers should not be ignored. 展开更多
关键词 carbon disulfide NEUROTOXICITY cross-sectional study
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