07:16:04
The amounts being released, he says, are "entirely consistent" with the relatively low amounts of caesium and iodine being measured in soil, plants and water in Japan, because so much has blown out to sea. The amounts crossing the Pacific to places like Sacramento are vanishingly small – they were detected there because the CTBT network is designed to sniff out the tiniest traces.
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文章说到，他们推测的这个福岛碘和铯放射性总量是跟日本现在的水土等遭到的辐射情况相吻合的，因为大部分辐射都已经被吹到了太平洋。
The Chernobyl accident emitted much more radioactivity and a wider diversity of radioactive elements than Fukushima Daiichi has so far, but it was iodine and caesium that caused most of the health risk – especially outside the immediate area of the Chernobyl plant, says Malcolm Crick, secretary of a United Nations body that has just reviewed the health effects of Chernobyl. Unlike other elements, he says, they were carried far and wide by the wind.
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的确，大切有更多的辐射和出现了门捷列夫元素周期表，但是根据对大切的后期研究发现，还是碘131和铯137对人体健康的伤害最大，因为这两者能够随风飘的更远。
07:24:39
Iodine is rapidly absorbed by the thyroid, and leaves only as it decays radioactively, with a half-life of eight days. Caesium is absorbed by muscles, where its half-life of 30 years means that it remains until it is excreted by the body. It takes between 10 and 100 days to excrete half of what has been consumed.
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碘，被甲状腺迅速的吸收，无法排出，8天半衰期。铯，迅速的被肌肉吸收，30年半衰期，他可以被排泄出体外，但是需要10天-100天，才能排出其一半的吸收量。
07:27:37
While in the body the isotopes' radioactive emissions can do significant damage, mainly to DNA. Children who ingest iodine-131 can develop thyroid cancer 10 or more years later; adults seem relatively resistant. A study published in the US last week found that iodine-131 from Chernobyl is still causing new cases of thyroid cancer to appear at an undiminished rate in the most heavily affected regions of Ukraine, Belarus and Russia.
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而进入人体的放射性元素持续的对人体的DNA进行破坏。碘131对儿童的破坏力持续上10年。当年大切的儿童25年来患甲状腺癌症的发病率从来都没有下降。
Caesium-137 lingers in the environment because of its long half-life. Researchers are divided over how much damage environmental exposure to low doses has done since Chernobyl. Some researchers think it could still cause thousands of new cases of cancer across Europe.
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铯137对环境的破坏最大，因为其半衰期非常长。欧洲一些学者认为现在欧洲的癌症很大一部分都跟大切射出的铯有关系。 |
楼主: 新来的守桥人
发表于 2011-3-25 08:50:01
