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- 2011-7-21
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- 1970-1-1
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啊啊啊啊,这两天都没首页,运气好差,明天考试求转运,求祝福
另感谢PPX,辛苦了
01:33
The stone in Libyan desert is the first direct evidence of a comet exploding in our atmosphere.
Several study and data of this stone.
01:19
More Syrian students abroad are applying the funds.
Introduce the academic environment in the Syria:bad
01:39
The interviewee says that she have to leave Syria because of her lecture and that the government use violence in scientific aspects.So do scholars.
01:36
Many universities and labs are under control of the government.Many professors and students have to leave their country witou any document,making them difficult to study abroad.The interviewee is calling for help and want to rebuilt the education system after the regime falls.
01:37
A fossil of a female mosquito with traces of blood is found recently.This fossil shows that blood-feeding have began since 46 millions years ago.The fossil also provides some molecules in the ancient times,helping scientists to study.
07:27
The main idea of the argument is that exercises will alos increase our brain health.
Old researches onlu focused on how FNDC5 benefits the body and the mechainsm of how exercises benfits the body.
A new study reveals that FNDC5 can alo benifit out brain.Exercises can increase the BDNFs in our brains,which are good to our brain health.But researchers do not know the mechanism in this process.
To find out the mechainsm,an experiment on mice was made.The result shows that the increase of FNDC5 in body can turn BDNF genes in brain to produce more other BDNF proteins.
Researchers want to know how exercises make the brain to produce BDNF,in other words,how can FNDC5 in body can affect brains.To answer this question,another experiment was made.As the result,the possible explaination is that the irisin which realse by the body during exercises could be capable of passing the blood-brain barrier, or that it regulates some other (unknown) molecule that crosses into the brain.
But stil some questions such as how much benfits come from irisin that was made in body and then transfers to the brain or come from the irisin that was made in the brain remain unknown.More study is needed to be made .
Obstacle 好感兴趣,细看了一下,果然生命在于运动! |
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