Study of PCBs safety evaluation in food
Abstract: Polychlorinated Biphenyls is a global toxic pollutants, As the stability of physical and chemical properties of PCBs, Is very difficult to degrade(Its half-life of about 40 years), Coupled with its long-term accumulation as well as some of the isomers and congeners with a high degree of bio-accumulation and toxicity, Has resulted in a global pollution. Has proven to PCBs on the skin, liver, gastrointestinal system, nervous system, reproductive system, immune system diseases and even cancer are in maize. According to the information, Many scholars of the PCBs found in animal experiments have been done ample research, PCBs in the experiment of small micro-organisms. Therefore, Decided to study whether the observed impact of PCBs on the microbial growth. Observation of PCBs in the PCB105, PCB118, PCB157 and PCB169 on the inhibition properties of bacteria, PCB containing a certain amount of paper, Flat stick has been tested bacteria inoculated agar medium, The plate at 37 ℃ for 48 hours under observation. Results suggest that PCBs have on the growth of bacteria inhibition, But this inhibition is not very clear. In the four PCBs , 80ppb of PCB169 on the inhibitory effects of several other bacteria is the greatest impact. Therefore,PCBs are not well inhibited the growth of bacteria,And can stay in bacteria, Harm to human health.
