【精选】研究生英语第二单元课件.ppt

* Cancer Chemical —Are We Going Too Far？ 陈 俊 Michael Materials Science and Engineering: Cancer Chemical : refers to the compound?which can lead to?increased?morbidity or mortality,? animal?and human tumors.?For example:? aflatoxin,?benzopyrene and benzene?etc.. Noun Explanation morbidity: 病态;?不健全;?发病;?发病率; mortality: 死亡率;?必死性，必死的命运 tumors: 肿瘤 aflatoxin: 黄曲霉毒素 ? benzopyrene :苯并芘 In our daily life.?What are the common?chemical carcinogens? carcinogen:致癌物 carcinogen It is known?cancer causing?chemicals? had one more thousand kinds of.? Including natural?and synthetic（人工 合成）.The common?are the following ： Polycyclic?hydrocarbons (多环性碳氢化合物) Coloring matter (染料)? Nitrosamine （亚硝胺） Mycotoxin (霉菌毒素) Are we going too far？ British study?found that 40% of all cancers are related to lifestyle Published in the British?Journal?of?Cancer?based?on cancer patients? lifestyle analysis showed that,?130000 people are?diagnosed with cancer?every year in the UK,where 40% of the people?are smoking, ?drinking?and?the wrong?diet and other lifestyle.?The?effects of smoking,accounting for about?23%?of male patients?and?15.6% female?patients with?cancer;?the second problem is?the lack of?male? fresh fruits and vegetables?intake and obesity in women,?which?lead to cancer?more easily than drinking;?and the cancer?with?living and working?place.each of the 25?patients had?a regular?exposure to chemical?carcinogens;?gastric cancer?is associated with excess salt?intake;?oral and pharyngeal cancer?are related to lifestyle. Are we going too far？ Smoking: Produced when lit cigarette smoke contains more than 2,000 kinds of harmful chemicals,there are 40 kinds of carcinogens. In all cancer patients, 1/3 or more associated with smoking, such as lung cancer, laryngeal cancer(喉癌), oral cancer,esophageal cancer（食管癌）, gastric cancer(胃癌), pancreatic cancer（胰腺癌）, kidney cancer（肾癌）,bladder cancer. Smokers, the incidence of lung