【Phat Yeti出品】60-SECOND SCIENCE 官方听力文稿 + 讨论帖 （更新至：2008.03.07）

zhoushengyuanlyUID: 2246479

:rolleyes: 我也老了。。不如从前了

豆豆～UID: 2378384

我也老了。。。sigh:o

豆豆～UID: 2378384

Sperm Subject To Attack--By Pollution


Air pollution is bad for our health, but scientists say we don’t know much about the long-term effects. So researchers in Canada and the Netherlands decided to gather genetic information in an urban industrial environment—by looking at mouse sperm. They published the study in the Proceedings of the National Academy of Sciences.

The scientists placed cages of mature male mice near two steel mills and a major highway in the city of Hamilton, in Ontario, Canada. Some of the mice breathed in the ambient, particulate-filled air. The control mice breathed pure, filtered air. After ten weeks, researchers checked the two groups. The mice exposed to the polluted air had a 60 percent higher rate of sperm mutation. It occurred in a piece of DNA particularly susceptible to mutation.

Researchers say these specific mutations are known to affect gene expression and genome stability, and could lead to changes in genetic composition and disease. They say they can’t yet extrapolate from these findings to the long-term health effects in humans, but they say the results definitely warrant a more detailed look at pollution’s effects on our genes.

[ 本帖最后由 豆豆～ 于 2008-2-1 22:39 编辑 ]

深海lavenderUID: 2350207

你个小盆友,少装啊~~:o ;d:

zhoushengyuanlyUID: 2246479

up.,...

sunny_hangzhouUID: 118188

UP

jonathan1987UID: 2376942

打不开啊！！

zhoushengyuanlyUID: 2246479

早上来下。。网速快

ammy010UID: 2368811

Thank you!

zhoushengyuanlyUID: 2246479

up

10405zyUID: 2188360

真是好东西，一直在听！

viennaUID: 2408794

相当感激楼主~~~
我就想找点东西练练听力呢~

深海lavenderUID: 2350207

up.

zhoushengyuanlyUID: 2246479

;) 。。up

cytochromeUID: 2296260

ding