Objective:To understand the fundamental state of noise exposure and hearing loss of rolling steel workers,analyze and appraise them,investigate the important contribution of knowledge,attiude and practice of workers for their hearing protection, provide theory instructions for the prevention and cure of occupational noise and noise-induced deafness.

Based on the distribution of H2S in the cochlea and its effect on angiotasis regulation, plus the pivotal role that microcirculation played in noise-induced hearing loss, we observed the expression and distribution of cystathionine-γ-lyase (CSE), a H2S synthetase in mammalian, in adult rat cochlea before and after noise exposure.

According to statistic for quantity of domestic textile industry workers,length of service and survey for noise of local company,the situation of noise exposure and employees\' hearing loss were predictied base on ISO1999-1975 (E) and other related methods of prediction.

Research on the influence of occupational fluorine expose on hormone of calcium adjust,muscle electricity physiology activity and bone density;

Ananlysis of occupational exposure to HIV and its corresponding protective strategies;

A review of researches on occupational exposure to blood-borne pathogens among clinical nurses in China;

Survey on knowledge about HIV/AIDS occupational exposure and self-protection among health workers;

Analysis of the survey on policeperson’s knowledge on HIV/AIDS and attitude and behavior toward harm reduction of drug using and the risk of professional exposureof HIV in Yunnan;

Survey and protective strategies on professional exposure of midwives;

Objectives:To investigate medical staff professional exposure status and find how to prevention them.