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

豆豆～UID: 2378384

Put A Pullet In Your Tank

The search for alternative fuels to gasoline has led to surprising possibilities—for instance, the waste oil from making French fries.  But one of the most unusual alternative fuel candidates might be chicken fat. Yes, chicken fat, also called schmaltz.  So if you make chicken soup you might have a valuable resource in your kitchen—besides the actual soup.

Chemical engineers at the University of Arkansas report that when chicken fat is combined with methanol under very high temperatures and pressure (known as supercritical conditions) they got biodiesel.  The method converted 89 percent of the chicken fat to biodiesel. The research was done as part of a master’s thesis project by chemical engineering student Brent Schulte.

Many people have high hopes for biodiesel as a replacement for fossil fuels, because it uses renewable resources such as plant oils, or in this case chicken fat, of which there is certainly no shortage. The hunt for biodiesel may mostly take place outdoors.  But the potential of French fry flotsam and chicken fat also means the search can sometimes end in the kitchen.

zhoushengyuanlyUID: 2246479

up...

深海lavenderUID: 2350207

up.

chori84UID: 2343163

很不错~:)

深海lavenderUID: 2350207

继续UP.
原来以为东西递出去了会发大洪水,现在居然累的不想水了.........

lintelleUID: 2297267

不水。

我们一起发火把。

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!