大学生手机带菌状况调查分析

通过调查了解大学生手机带菌状况,从而促进大学生健康使用手机,并为手机清洁及消毒提供科学依据。方法:采用整体和单纯随机抽样法,抽取山东协和学院医学专业和非医学专业的200名学生的手机,对手机使用情况进行问卷调查,并采集手机表面细菌样本,进行培养及菌落计数。结果:从专业角度分析,医学专业的学生手机带菌超标率为71%,非医学专业的学生手机带菌超标率为64%;从性别角度分析,医学专业男生手机带菌超标率72%,女生为74%,非医学专业男生手机带菌超标率为62%,女生为70%。结论:大学生手机受细菌污染较为严重,并缺乏对手机清洁及消毒的意识。医学生的手机污染比非医学生的污染更为严重。建议大学生重视手机带菌状况,养成良好的用机习惯,并对手机定期消毒,以避免手机作为媒介传播疾病。

The characteristics of Quaternary activity of faults in the sea area near the Yangtze River mouth

By shallow seismic prospecting, it is showed that the faults in the sea area near the Yangtze River mouth are mainly the NE and NW-trending faults. The main activity time of fault is Pliocene to Early Pleistocene, and the latest activity is up to Middle Pleistocene. The maximum of fault is generally several tens meters with the throw decreased upward. The dislocation near the bottom of Middle Pleistocene is 12~13 m. The average vertical dis-placement rate is on a level of 10-3 mm/a.