PCBs
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The document discusses PCBs (polychlorinated biphenyls), their industrial uses, health effects, and impact on reproduction and neurodevelopment. It summarizes studies finding associations between PCB exposure through contaminated fish/oil consumption and reduced birth weight, gestational age, and IQ in children. While effects on human reproduction are unclear, some studies link specific PCB congeners to impacts on sperm quality and morphology.
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Polychlorinated biphenyls (PCBs) are a group of manmade chemicals. They are oily liquids or solids, clear to yellow in color, with no smell or taste. PCBs are very stable mixtures that are resistant to extreme temperature and pressure. PCBs were used widely in electrical equipment like capacitors and transformers. They are toxic. Polychlorinated biphenyls (PCBs) are a group of manmade chemicals. They are oily liquids or solids, clear to yellow in color, with no smell or taste. PCBs are very stable mixtures that are resistant to extreme temperature and pressure. PCBs were used widely in electrical equipment like capacitors and transformers.
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Polychlorinated biphenyls (PCBs) are odorless, tasteless liquids that are degraded slowly and accumulate in the environment. They bind to the aryl hydrocarbon receptor in cells and can alter gene transcription. PCBs are classified as persistent organic pollutants due to their bioaccumulation and inability to decompose readily, with half-lives of 8 to 10 years. Long-term exposure to PCBs is linked to various health effects like endocrine disruption and cancer as well as environmental damage.
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三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
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PCBs
- 1. PCBs – Polychlorinated Biphenyls Juliann Chen Laura Stachel
- 12. Levels of PCB 1.9 ppm Bottom-feeding and game fish ( EPA, 1992) 20 ppm Fish near hazardous waste sites ( ATSDR, 2000) <20 ppb Background levels in human serum (1980s) 1-2 ppm Human adipose tissue 40-100 ppb Human breast milk 40-100 ppb Recreational fishers
- 17. Reproductive Effects Animal and Human studies
- 24. Human Development Birth Weight and Gestational Age
- 27. Increase 72 Wisconsin fish eaters Smith Decrease 179 Netherlands Pantandin No change 912 North Carolina background Rogan No change Lake Ontario fisheaters Lonky Decrease 200 Occupational exposure Taylor Decrease 241 Michigan fish eaters Jacobson Birthweight number Location Study
- 30. Neurodevelopmental Tests Ribas-Fito et al. 2001
- 31. Neurodevelopment Yusho and Yu-Cheng experience
- 34. Mean Difference in Full Mental Scales – Taiwan
- 35. Neurodevelopment Fish consumption studies
- 44. Schantz et al. 2003 Dutch cohort (cont)
- 48. Ribas-Fito et al. 2001
- 50. Schantz et al. 2003
- 51. Prop 65 and PCB Should salmon carry warning labels? Should breast milk?
- 53. Primary source of exposure - diet Courtesy of the BC Salmon Farmers Association
- 54. FDA allowable tolerance limits 0.2 Finished animal feed for food producing animals (except feed concentrates, feed supplements, and feed premixes) 3 Red meat 0.2 Infant and junior foods 0.3 Eggs 3 Poultry 1.5 Cow Milk / Dairy (fat) 2 Fish (fat) Concentration (ppm) Commodity
- 62. Breastfeeding and PCB Human development
- 67. Levels in breast milk ATSDR, 2000
- 69. PCBs Other health effects