Scientific American 60 Second Science听抄（有音频文件）

chuanweizuoUID: 2189837

Good reading be good for your health, in more ways than one. Last week we talked about reseachers that showed far higher motality rates in people with low literacy skills. They just don't know how to follow health care advice. This week a study published by the Amercian Academy of Morology found that a stronger reading skill seemed to help sheild smelter workers from toxic damage. The new study divided smelter workers in Canada into two groups: those with high and low cognitive reserve. That's the brain's ability to function in spite of damage. The workers were tested for cognitive skills, how fast they think; motor speeds skills, how fast they react; and reading ability. Despite similar levels of exposure to lead, the group showed very different results. The cognitive effects of lead was 2.5 times greater in workers with poor reading ability. Scientists think the heavey reading could contribute to more brain capacity and easier use of alternative circuits, a kind of brain backup system. Still the fancy book learning wasn't a curer, exposure to lead impact the motor speed of both groups about the same way.

kevinliu6883UID: 2338522

Could reading be good for your health, in more ways than one? Last week we talked about research that shows far higher mortality rates in people with low literacy skills. They just don’t know how to follow health care advice. This week’s study published by the American Academy of Neurology found stronger reading skills seems to help shield lead smelter workers from toxic damage. The new study divided smelter workers in Canada into two groups: those with high and lower cognitive reserve. That’s the brain’s ability to function in spite of damage. The workers were tested from cognitive skills--how fast they think, motor speed skills--how fast they react, and reading ability. Despite similar level of exposure to lead, the groups showed very different results. The cognitive effects of lead were 2.5 times greater than workers with poor reading ability. Scientists think that heavy reading could contribute to more brain capacity and an ease of using alternative circuits, a kind of brain backup system. Still, the fancy book learning wasn’t the curer. Exposure to lead impacted the motor speed of both groups in about the same way.

kevinliu6883UID: 2338522

Lead was found to be 2.5 times more likely to have negative effects on the brains of adults with limited reading ability than on the brains of good readers, the researchers report in the July 31 issue of Neurology.

However, reading ability did not protect individuals' motor skills from the toxic effects of lead.

A team at the Center for Occupational and Environmental Neurology, in Baltimore, studied the effects of lead exposure on 112 lead smelter workers in New Brunswick, Canada. The workers took several thinking and motor-speed tests as well as a measure of their reading ability.

The researchers then calculated working lifetime lead exposure from historic blood lead levels obtained by the smelter. The workers were divided into groups with "high cognitive reserve" - defined as a reading level of 12th grade or higher - and "low cognitive reserve," a reading level of 11th grade or lower.

Cognitive reserve refers to the mental abilities, such as reading ability, that are generally not affected by lead exposure in adulthood. They act as a measure of the brain's ability to maintain function despite damage.

The results: "Even though the two groups had similar lead exposure, the cognitive effects of lead were 2.5 times greater in workers with low reading ability," study author Dr. Margit L. Bleecker said in a prepared statement. "In contrast, the effect of lead on motor speed was comparable in both groups as cognitive reserve does not apply to motor speed," she said.

"This suggests that high cognitive reserve has a protective effect that allowed these workers to maintain their functioning, even though lead affected their nervous system as shown by its effect on their motor skills," Bleecker added.

How might reading protect the brain? According to the researchers, an increased number of cortical synapses in larger brains might provide more brain capacity, the option to use alternative brain circuits if some are damaged, and the ability to process tasks more efficiently.

edoooUID: 2288057

好像sciam服务器down了，谁有音频传一个，谢谢

yyhwzcUID: 2273827

昨天出去玩了没听抄，今天回来就上不去sciam了。谁给传一个：）

yyhwzcUID: 2273827

Aug 1st

Could reading be good for your health in more ways than one? Last week we talked about research that showed far higher mortality rates in people with low literacy skills. They just don't know how to follow health care advice. This week a study published by the American Acadamy of Neurolgy found that stronger reading skills seemed to help shield lead smelter workers from toxic damage. The new study divided smelter workers in Canada into two groups, those with high and low cognitive reserve. That's the brain's ability to function in spite of damage. The workers were tested for cognitive skills, how fast they think, motor speed skills, how fast they react, and reading ability. Despite similar levels of expousure to lead, the group showed very different results. The cognitive effects of lead were 2.5 times greater in workers with poor reading ability. Scientists think the heavy reading could contribute to more brain capacity and ease of using alternative circuits, a kind of brain back-up system. Still the fancy book learning wasn't the cure-all. Exposure to lead impacted the motor speed of both groups about the same way.

linkunkun7UID: 2196646

现在可以登上去了:)

阿yaUID: 2179933

8月2号怎么米有呢？？

dcbUID: 2232749

Aug 02

The Tour de France ended Sunday with 24 year-old Spaniard Alberto Contador taking home the yellow jersey. The doping scandals tart the race which is a shame because what clean riders do is superhuman. They covered, and quickly,  2200 miles and 20 days over mouotains. Contador spent 90 hours in the saddle during the race. The other hundred and forty cyclists should finished spending even more time riding because they were slower. And according to researchers at the the Pennington Biomedical Research Center at Baton Rouge, the riders needed more than 20 million calories to complete the course. To put that in perspective, 20 million calories is what's and about(not sure) 72,000 cheeseburgers. There works out to the equivalent of 25 cheeseburgers per rider per day. When they are on the road, each tour rider generates somewhere between 250 to 350 watts. If all that power can be captured, the one million people lining the course everyday to watch the (not catch) could probably run all their ipods and radios of the cyclists' output, plus have enough left over to cook a cheeseburger of their own.


[ 本帖最后由 dcb 于 2007-8-2 23:50 编辑 ]

gre啊greUID: 2200189

在Science Daily 你是怎么找出这篇文章的？用搜索还是在某个目录下？
谢谢

gre啊greUID: 2200189

你发帖子的时候美国才凌晨4：10分啊！:)
怎么也得等人家上班了才行啊，以我的经验，一般最早9：00左右，就是我们的21：00左右。

kelediguoUID: 149939

原帖由 gre啊gre 于 2007-8-3 02:12 发表
在Science Daily 你是怎么找出这篇文章的？用搜索还是在某个目录下？
谢谢

这个我也没啥好办法，它网站上有好多分类的，运气好的时候你在首页就能找到相关文章，运气不好的时候用了它网站的搜索还是一无所获。你可以试着用关键字在google上搜一下，应该能找到不少结果。

evennyUID: 2153902

谢谢楼主

kelediguoUID: 149939

on dcb. dcb听得真不错，我有好几个都没听出来，看了你的才恍然大悟:loveliness:

2007-8-2

The Tour de France ended Sunday with 24-year-old Spaniard Alberto Contador taking home the yellow jersey. The doping scandals tart? the race which is a shame because what clean riders do is superhuman. They cover, end quickly （瞎猜的）2200 miles in 20 days over mountains（拼写）. Contador spent 90 hours in the saddle during the race. The other 140 cyclists who finished spent even more time riding because they were slower. And according to researchers at the （多一个the）Pennington Biomedical Research Center in Baton Rouge, the riders needed more than 20 million calories to complete the course. To put that in perspective, 20 million calories is what’s in about 72,000 cheeseburgers. That works out to the equivalent of about 25 cheeseburgers per rider per day. When they are on the road, each tour rider generates somewhere between 250 and 350 watts. If all that power could be captured, the one million people lining the course everyday to watch the ？ （听不出来）speed by could probably run all their iPods and radios of the cyclists’ output, plus have enough left over to cook up a cheeseburger of their own.

H-KevinUID: 2182070

August 2

Based on kelediguo

The Tour de France ended Sunday with 24-year-old Spaniard Alberto Contador taking home the yellow jersey. The doping scandals tart? the race which is a shame because what clean riders do is superhuman. They cover, and quickly 2200 miles in 20 days over mountains. Contador spent 90 hours in the saddle during the race. The other 140 cyclists who finished spent even more time riding because they were slower. And according to researchers at the Pennington Biomedical Research Center in Baton Rouge, the riders needed more than 20 million calories to complete the course. To put that in perspective, 20 million calories is what’s in about 72,000 cheeseburgers. That works out to the equivalent of about 25 cheeseburgers per rider per day. When they are on the road, each tour rider generates somewhere between 250 and 350 watts. If all that power could be captured, the one million people lining the course everyday to watch the pendleton speedby could probably run all their iPods and radios of the cyclists’ output, plus have enough left over to cook up a cheeseburger of their own.