【每日阅读训练第四期——速度越障23系列】【23-01】科技

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许多小学生都知道恐龙的灭绝以及其他一些大型的生物灭绝
但是他们却可能不知道灭绝的原因都是相似的，但是灭绝的细节可能有所不同
恐龙灭绝时大量的火山喷发，地球的生态环境变得非常脆弱，一个科学家认为是应该由其他的东西撞击地球引起的
科学家发现了个坑，这个坑的年代与恐龙灭绝的时间相符，但是许多人质疑了这个坑的大小不足以引起灭绝
科学家解释了疑惑
这个理论需要被接受还需要更多的研究和证明

迷你起酥

wangziann 发表于 2013-8-9 09:58
谢谢回复。嗯，同意你的分析，根据原文的意思却是如此。
但是我有个想法，从更严密逻辑的角度来讲，UV降 ...

因为有个对照试验 没有UV只有VD 血压没降...

AceJ

Homework:

Could Discovery Lead to End of Sunburn Pain?
Time1: 2'15" UVB > TRP4 > sunburn pains, a natural way of telling people to avoid further damages
Time2: 3'19" process of uncovering sunburn pains in mice and then discover that TRPV4 may resist sunlight damage, needing more tests

Sunshine Could Benefit Health and Prolong life, Study Suggests
Time3: 2'22" exposing sunlight can reduce rate of heart disease and blood pressure, we need to further ensure whether exposure cause other negative effects

Brain Games Versus Nature Documentaries
Time4: 1'25" does brain games work? Maybe no. 135 tested people are divided into two groups, one playing brain games and another watching nature documentaries
Time5: 2'00" group watching videos gets an increase in language skills, problem of playing brain games is just not having enough efficacy, but we don't know what is enough, at least, playing games is fun

Small but deadly
The biggest extinction in history was probably caused by a space rock that changed the climate
Time6: 6'36"
The triggers of creature extinctions are same, but the details are significantly different
Permian extinction happened in the hundreds of thousands years of volcanic eruption, and what is missing is an asteroid or comet, and a suitable crater
Why does Dr. T believe that a crater with just a 40km diameter is culprit of the biggest extinction? Oil shale, causing thousands of earthquakes and releasing oil and gas
Methane is the very greenhouse gas, which can warm up the globe.
But there are still many denies and questioning, Dr. T must to prove himself

wangziann

迷你起酥 发表于 2013-8-9 15:42
因为有个对照试验 没有UV只有VD 血压没降...

严重同意。。。

kia小铁侠

Timer1: 1'31    the skin hurt by too much sunlight is caused by a certain molecule according to a research, and such molecule can bring pain feeling.
Timer2: 2'14    the experiment to mice cells shows the procedure from sunlight to the pain on humans, which also comes to the same conclusion on human cells.
Timer3: 1'37    in fact, the sun light benefit more than damage our body, because there will be a compound under the sunlight, which reduces blood pressure.
Timer4: 0'58    according to a recent research, some brain-training games or quizes may not help improve brain capability.
Timer5: 1'10    researchers found that through some language-based games or activities, people's language skill will slightly improve, however, some video games do little help for humans brain or language development.


Timer6: 4'03    the extinction may be caruse by a space rock.
                structure:
                 --the reason dinosaurs' extinction --promote an idea --evidence of the culprit of mass extinction -- further explanation for it -- fracking operationTimer1: 1'31    the skin hurt by too much sunlight is caused by a certain molecule according to a research, and such molecule can bring pain feeling.
Timer2: 2'14    the experiment to mice cells shows the procedure from sunlight to the pain on humans, which also comes to the same conclusion on human cells.
Timer3: 1'37    in fact, the sun light benefit more than damage our body, because there will be a compound under the sunlight, which reduces blood pressure.
Timer4: 0'58    according to a recent research, some brain-training games or quizes may not help improve brain capability.
Timer5: 1'10    researchers found that through some language-based games or activities, people's language skill will slightly improve, however, some video games do little help for humans brain or language development.

Timer6: 4'03    the extinction may be caruse by a space rock.
        structure: --the reason dinosaurs' extinction --promote an idea --evidence of the culprit of mass extinction -- further explanation for it -- fracking operation

铁板神猴

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nickychen

半路加入~~

一上来就科技，我晕，总结的不知道是什么....


Time 1: 2'08"
Scientists found out why sunburn hurts.Some molecule caused this pain involved in many other pain process.

Time 2: 3'30"
Scientists used a experiment to prove UVB exposure activates TRPV4 in mice. Blocking TRPV4 will prevent and treat sunburn.

Time 3: 2'36"
The sunshine can help people reduce blood pressure, and the benefits far outweigh the risk of getting skin cancer.
Through a experiment scientists proved that sunshine not the heat can reduce the blood pressure.
But scientists still need to look at the relative risk of heart disease and skin cancer.

Time 4: 1'06"
Documentaries are more helpful on memory or attention improvment than are mental games.

Time 5: 2'14"
Scientists did not find a huge impact on mental training games, but they think maybe because of the reasons below:
The documantaries are focus on language but only 1/5 of the games is focus on it.
The team hasn't do enough training. But scientist still need to find out what is 'enough'.

Time 6: 5'40"
Whether an impact extinct P period? Some scientists believed that even the extinction caused by an impact, there are still have some different reasons with C period extinction. But some scientists believed the crafter found as a evidence is just a coincidence.

flonacui

1.2'04''
A new research conducted by multi-institutional team of researchers has found that the pain caused by UVB could be protected by blocking the TRPV4 molecule.
2.2'59''
The researchers conducted experiment using normal mice and mice without TPRV4, and found that mice without TPRV4 are less sensitive to UVB and did not have pain when exposed to the sunlight.
Then the researchers using a device to study the cultured mouse skin to know the process.
When the reasearchers injest a chemical which block the TRPV4, the mice became normal.
Researchers have to do additional research to address the concern.
3.2'20''
Exposure in sunlight could reduce people's blood pressure, thus benefiting people's health.
One experiment.
The overall benefits outweigh the harm caused by the UV.
4.1'10''
It seems that the brain games are not as effective as people once thought.Watching short nature documentaries shows some effects.
A experiment.
5.1'26''
The result shows that people who watch the nature documentaries have a increase in language skills compares with people who play the brain games.Reasons.
But the researchers said that brain game could be useful for some people, but they haven't figured out how much is enough.
obstacle 3'25''
A research indicated that the biggest extinction was probably caused by a  space rock.
The researcher has a lot more to do to solve the questions.

鸢尾yuanwei

thx change~~~~~~~~~~~~~

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veronicazlx

1.        2’15
Scientists have discovered that a molecule, TRPV4, can protect against painful effects of sunburn and certain pains. Sunlight can provide people with Vitamin D and good mood, but too much sunlight may affect DNA and even cause cancer.

2.        3’45
Scientists used mice and human skin as models and found that UVB will cause calcium flow into the skin cell, but only with TRPV4 present. However, the other functions or effects of TRPV4 need to be further studied.

3.        2’16
Scientists have found that the UV rays of sunlight will trigger a compound to reduce the blood pressure. The benefits of sunlight that reduce the blood pressure far outweigh the risks of skin cancer caused by sunlight. Scientist gathered at Edinburgh to show their discovery.

4.        1’15
A woman conducted a research and found that the brain-training games may not really work. People who read nature documentaries may have better performance than people who have brain-training games.

5.        1’54
People who watched nature documentaries said they become relax, and they were proved to have better language performance in the test. The brain-training games, though still very interesting, may focus less in language and have less effect on people.ß

6.
Dr Tohver provided another explanation of the extinction of dinosaurs, rather than volcanic explosion. The comet or asteroid may crushed with the Earth and left a crater which had oil shale, then caused strong earthquake, which brought the methane out and increased the temperature of the Earth.