SSS 2010-05-06
时间：2019-01-08 作者：英语课 分类：Scientific American(五)月
The big dream for neuroscientists is to be able to watch our brain cells in action, in real time.
Well, new research has maybe found the most promising 1 tool yet—a technique to watch individual neurons light up in response to a stimulus 2, like flipping 3 on a light switch.
Scientists at the Max Planck Institute inserted a light-sensitive protein into a lab mouse. When a neuron fires, calcium 4 ions flood through special cell channels. And when this light-sensitive protein binds 5 to calcium, it radiates yellow light. So when the neuron fires it glows yellow.
When scientists shot a puff 6 of air at the mouse’s whiskers, the brain cells in the sensory 7 areas of the cortex glowed yellow. They watch this via thin glass fibers 8 inserted into that brain region.
With this technique scientists now have a way to watch single cell activity in many different regions of the brain at once.
The hope is to investigate how the brain forms and loses neural 9 connections during life experiences and when suffering from illnesses such as Alzheimer’s, Parkinson’s and schizophrenia.
—Christie Nicholson
- The results of the experiments are very promising.实验的结果充满了希望。
- We're trying to bring along one or two promising young swimmers.我们正设法培养出一两名有前途的年轻游泳选手。
- Regard each failure as a stimulus to further efforts.把每次失利看成对进一步努力的激励。
- Light is a stimulus to growth in plants.光是促进植物生长的一个因素。
- We need calcium to make bones.我们需要钙来壮骨。
- Calcium is found most abundantly in milk.奶含钙最丰富。
- Frost binds the soil. 霜使土壤凝结。 来自《简明英汉词典》
- Stones and cement binds strongly. 石头和水泥凝固得很牢。 来自《简明英汉词典》
- He took a puff at his cigarette.他吸了一口香烟。
- They tried their best to puff the book they published.他们尽力吹捧他们出版的书。
- Human powers of sensory discrimination are limited.人类感官分辨能力有限。
- The sensory system may undergo long-term adaptation in alien environments.感觉系统对陌生的环境可能经过长时期才能适应。
- Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上，以硫酸钠为凝固剂，对胶原-PVA共混溶液进行湿法纺丝，制备了胶原-PVA复合纤维。
- Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。