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n********1
发帖数: 197 | 2 I do not know why this can not be done if enough money is spent. Under high
energy proton and neutron, all atoms can be break down the recombine. Very
high efficiency to burn money. |
|
z***i
发帖数: 8285 | 3 英话念不通
I do not know why this can not be done if enough money is spent. Under high
energy proton and neutron, all atoms can be break down the recombine. Very
high efficiency to burn money. |
|
t*****n
发帖数: 1589 | 4 不明白中国人为什么老喜欢跟美国比，先赶上马来西亚吧。 马来西亚80年代生产的
proton, 中国汽车工业还要追赶很多年 |
|
i******l
发帖数: 268 | 5 我就选了proton therapy 的头条，里边主题内容第一段最后一句话就是
If detected early, prostate cancer has a 5-year survival rate of nearly 99%.
这里边主要讲就是用质子疗法。
当然你可以说晚期了照样治不好，但是晚期癌症的难点在于癌细胞扩散到了不同部位，
并不是因为高能质子轰击不到癌细胞。
说句不好听的话，如果你或者你爸妈被诊断出了癌症，还有三年期限，难道你不愿意有
栗子疗法来治疗？ |
|
S***a
发帖数: 934 | 6 看到了，这个作者Rees好像是霍金同学，原文是 man ~ (proton x planet)^1/2
这么写是也不能说错哈，man是指human的话，planet也不一定是地球 |
|
S***a
发帖数: 934 | 7 还有一个惊奇的发现是
(electron x sun)^1/2 ~ (proton x planet)^1/2
啊 这个算巧合么 |
|
m******f
发帖数: 4352 | 8 他那是atom/proton,不是electron,叶子你记错了 |
|
K*******y
发帖数: 6003 | 9 什么是 sucralfate tablets - 治胃溃疡的？？？
Nausea and vomiting.
Gastrin is a digestive hormone that causes the stomach to
produce acid. The kidneys are responsible for excreting much of the gastrin
produced in the body. As the kidneys fail, gastrin levels begin to rise, the
degree of hypergastrinemia increasing with the severity of the renal
insufficiency.6 This results in increased gastric acidity, nausea, vomiting,
poor appetite, and possible gastric ulceration and justifies the use of
appr... 阅读全帖 |
|
t*******n
发帖数: 306 | 10 我支持imar imar和proton今年都不会出现了 大家一定要愉快啊 |
|
y**t
发帖数: 4 | 11 alchemy is actually true science, it is just that those people
were trying to deal with atoms, not protons --- wrong direction.
2009) 提到:
2009) 提到:
and |
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o****t
发帖数: 275 | 12 Way more than the number of protons in the visible universe. |
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R*o
发帖数: 3781 | 13 E. Exposition Proper
It was common for Paul, having greeted the recipients of the letter, to move
on to a somewhat lengthy note of thanksgiving and prayer for the church in
question (except, of course, in Galatians where he is constrained to immedia
tely address their defection from the gospel). Such is the case here in Roma
ns 1:8-15.
Paul is thankful to God that the faith of the Romans is well known, undoubte
dly due in part to his prayers, and he expresses his deep desire, as an apos
tle to t... 阅读全帖 |
|
R*o
发帖数: 3781 | 14 E. Exposition Proper
It was common for Paul, having greeted the recipients of the letter, to move
on to a somewhat lengthy note of thanksgiving and prayer for the church in
question (except, of course, in Galatians where he is constrained to immedia
tely address their defection from the gospel). Such is the case here in Roma
ns 1:8-15.
Paul is thankful to God that the faith of the Romans is well known, undoubte
dly due in part to his prayers, and he expresses his deep desire, as an apos
tle to t... 阅读全帖 |
|
R*o
发帖数: 3781 | 15 E. Exposition Proper
Since the Jew is just as guilty as the Gentile (2:1-5; 17-23) and cannot sim
ply appeal to the token of circumcision to secure immunity from judgment (2:
24-29), the question might reasonably be asked—with the intention of impugn
ing God’s character and plan—what advantage is there, then, in being a Jew
or what is the value of circumcision? After all, it seems as if Paul just g
ot finished saying in 2:1-29 that there is no advantage whatsoever. Paul ans
wers this question an... 阅读全帖 |
|
R*o
发帖数: 3781 | 16 E. Exposition Proper
Since the Jew is just as guilty as the Gentile (2:1-5; 17-23) and cannot sim
ply appeal to the token of circumcision to secure immunity from judgment (2:
24-29), the question might reasonably be asked—with the intention of impugn
ing God’s character and plan—what advantage is there, then, in being a Jew
or what is the value of circumcision? After all, it seems as if Paul just g
ot finished saying in 2:1-29 that there is no advantage whatsoever. Paul ans
wers this question an... 阅读全帖 |
|
j*******7
发帖数: 6300 | 17 http://www-scf.usc.edu/~kallos/what_is_real.htm
What is real?
Take for example the first successful theory of gravity, Ptolemy's system of
epicycles. It was used before Newton to describe the motion of the planets,
by assuming that the earth was static in the center of the world and the
planets and the sun revolved around it. It gave relatively accurate results
for astronomical observations. Was it real? I guess not. It just helped the
calculations, correctly, to be carried out.
Then Newton's th... 阅读全帖 |
|
d****a
发帖数: 655 | 18 【 以下文字转载自 Biology 讨论区 】
发信人: yetiti (yeti), 信区: Biology
标 题: 转发：关于进化和起源的一篇文章--我读过的最好的科普作品
发信站: BBS 未名空间站 (Thu Jul 4 03:33:26 2013, 美东)
神棍请自动绕道，只是和搞生物的同学分享一篇好文
转载：原文链接：http://www.douban.com/group/topic/33656795/?r=1
在以前本小组的讨论中，我曾提到 “比如你如果不理解所有生物共有的膜渗透能量供
应化学原理，你就根本无从评价任何生命起源的理论。”
**********************
一 直觉与反直觉
直觉（intuitive）和反直觉（counterintuitive）是科学讨论在描述一个科学理论或
者发现的时候，经常使用的二分法。这个叫法本身并不那么科学和严谨，但是其中的意
味却是无限深长的。
既然不严谨，我也不去定义它，只看范例：
最简单清楚的直觉理论，在古希腊科学有很多范例。比如“物体排开的水量等于它的体
积”。比如欧几里得平面几何中的公设和简单定理。“凡直角... 阅读全帖 |
|
s*******y
发帖数: 238 | 19 智能设计论vs.弱人择原理
黄启新
智能设计论
很多科学家都认为我们所居住的地球没有什么特别，与其它星球一样围绕着太阳运行不
息，平平无奇，宇宙中像地球这样的星球多的是，这就是所谓「哥白尼原理」（
Copernicus Principle）1。
但是科学家在最近几十年来却发现地球并非平平无奇，而是有很多因素令她成为出奇地
适合人类居住的地方。例如2:
- 地球与太阳的距离适中：太远（地球就会太冷）或太近（地球就会太热）的话，地
球就不可能有稳定的水循环（water cycle）。
- 地球轨道的倾斜度适中：太大的话，地球的温差就会极端。
- 地球轨道的离心率（eccentricity）适中：太大的话，季节性的温差就会太极端。
- 地球的自转周期适中：太长的话，日夜的温差就会太大；太短的话，大气层的风速
就会太高。
- 地球表面的反照率（albedo）适中：太大的话，会失控地产生冰河；太小的话，会
产生温室効应失控的情况。
- 地球磁场强度适中：太强的话，电磁风暴会太强烈；太弱的话，臭氧层便不足以保
护地球上的生物，免受宇宙的高穿透性辐射所伤害。
同样地，我们的宇宙亦有很多精细微调的特性... 阅读全帖 |
|
s*********t
发帖数: 4253 | 20 人类对科学不了解之处还很多呢。。。 你先破解以下十大科学不解之谜才自信的笑笑
人家弱智吧！
科学家连为何要睡觉都搞不清楚，你先把简单的给解决再来研究如何让太阳停留在空吧
。。
http://www.iflscience.com/physics/top-10-unsolved-mysteries-sci
（科学不解之谜）Why do we sleep?
While we do know that the human body is regulated by a circadian clock that
keeps humans on a sleep/wake cycle, we don’t really know why. Sleep is the
time when our bodies repair tissues and perform other maintenance activities
, and we spend nearly a third of our lives snoozing. Some other organisms
don’t need to sleep a... 阅读全帖 |
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P****S
发帖数: 2286 | 21 （二）经部的观点
经部关于微观世界的观点，基本上与一切有部相似。二者之间的差别，在于经部进一步
将时间、空间、速度、方向等判定为非实有。
何谓空间？所谓空间，就是在一个范围内没有被任何物体所占据的位置，这种没有被占
的位置，就是空间，除此以外，并没有空间的存在。如果有东西占据了某个位置，这个
位置就没有空间了；当物体被移走后，腾出来的位置就是空间。由此可见，所谓的空间
，实际上是假立的、不实在的。
再说时间，不论是一分钟或一小时，一个月或一年，都只不过是物质变化的过程而已，
除此之外，并不存在所谓的时间。我们只能通过世上万物的变化来判定时间，譬如根据
气候的变化过程，而建立起春夏秋冬的时间概念等等。这种物质变化的过程，我们称之
为时间。
我们可以设想，如果太空中没有任何星球的话，我们能算定时间吗？不能。由此可知，
时间只不过是以物质变化为基础，由人的意识而增上安立的法。
虽然现代物理学对时间也有不同说法，到底时间存不存在，它的本体究竟为何，都是学
术界激烈讨论的课题之一，但经部的论师们却认为，时间只是人的一种概念而已，除了
物质的变化以外，实际上并不存在独立的时间本质。
那么速度又是什... 阅读全帖 |
|
d*****n
发帖数: 599 | 22 专利：
1. “Carbon-based compositions for reversible hydrogen storage,” W.A.
Goddard, W. -Q. Deng and X. Xu, pending patent, 2003.
2. “Fluorinated imidazole as water-free proton exchange membrane” W.A.
Goddard, W.Q. Deng and V. Molinero, pending, 2005.
3. Six filed provisional patents related to hydrogen storage: CIT-4156-P
, solar cell: CIT-4154-P, fuel cell: CIT-4137-P & CIT-4155-P, molecular
electronics: CIT-4123-P, organic electronics: CIT-4136-P. |
|
w****9
发帖数: 6338 | 23 鄙人找到工作就可以毕业了，现在找了大半年，除了几个电话面试，1个on-site以外，
没有什么进展啊。各位能不能帮忙啊，先谢了。
先介绍一下： 我华理高分子本科/硕士。（一个帖子中o兄说“当初97级高分子有个上
海女生我们都感觉很骚了”就是我们班的。）；
硕士毕业后在汽车行业工作了1年半；
然后到这边读chemical engineering, 方向是 proton exchange membrane fuel cell.
谢谢！ |
|
y*******o
发帖数: 746 | 24 再转载几篇评论：
Re:
物理终于发了今年第一篇PRL，有意思的是PRL还刊出了作者的中文名字：
Phys. Rev. Lett. 100, 135003 (2008)
Generating High-Current Monoenergetic Proton Beams by a CircularlyPolarized
Laser Pulse in the Phase-StableAcceleration Regime
X. Q. Yan (颜学庆),1,5,* C. Lin (林晨),1 Z. M. Sheng (盛政明),1,2,3 Z. Y.
Guo (郭之虞),1 B. C. Liu (刘必成),1,4 Y. R. Lu (陆元荣),1 J. X. Fang (方家驯
),1 and J. E. Chen (陈佳洱)1
1State Key Laboratory of Nuclear Physics and Technology, Instituteof Heavy
Ion Physics, Peking University, Beijing100871, China
2Be |
|
a*m
发帖数: 1217 | 25 我怎么记得陈佳洱校长80年代在北大任教的时候就发过PRL呢
再转载几篇评论：
Re:
物理终于发了今年第一篇PRL，有意思的是PRL还刊出了作者的中文名字：
Phys. Rev. Lett. 100, 135003 (2008)
Generating High-Current Monoenergetic Proton Beams by a CircularlyPolarized
Laser Pulse in the Phase-StableAcceleration Regime
X. Q. Yan (颜学庆),1,5,* C. Lin (林晨),1 Z. M. Sheng (盛政明),1,2,3 Z. Y.
Guo (郭之虞),1 B. C. Liu (刘必成),1,4 Y. R. Lu (陆元荣),1 J. X. Fang (方家驯
),1 and J. E. Chen (陈佳洱)1
1State Key Laboratory of Nuclear Physics and Technology, Instituteof Heavy
Ion Physics, Peking Unive |
|
|
g***j
发帖数: 40861 | 27 【 以下文字转载自 Biology 讨论区 】
发信人: yetiti (yeti), 信区: Biology
标 题: 转发：关于进化和起源的一篇文章--我读过的最好的科普作品
发信站: BBS 未名空间站 (Thu Jul 4 03:33:26 2013, 美东)
神棍请自动绕道，只是和搞生物的同学分享一篇好文
转载：原文链接：http://www.douban.com/group/topic/33656795/?r=1
在以前本小组的讨论中，我曾提到 “比如你如果不理解所有生物共有的膜渗透能量供
应化学原理，你就根本无从评价任何生命起源的理论。”
**********************
一 直觉与反直觉
直觉（intuitive）和反直觉（counterintuitive）是科学讨论在描述一个科学理论或
者发现的时候，经常使用的二分法。这个叫法本身并不那么科学和严谨，但是其中的意
味却是无限深长的。
既然不严谨，我也不去定义它，只看范例：
最简单清楚的直觉理论，在古希腊科学有很多范例。比如“物体排开的水量等于它的体
积”。比如欧几里得平面几何中的公设和简单定理。“凡直角... 阅读全帖 |
|
w*******n
发帖数: 11041 | 28 看过后笑的请举手！
“Two protons walk into a black hole." |
|
s******o
发帖数: 298 | 29 Possible Planet Birth Detected in Chemistry Around Star
By Robert Roy Britt
Senior Science Writer
posted: 02:00 pm ET
03 July 2002
Astronomers have found abundant amounts of a chemical typically seen only in
the giant planets of our own solar system around a young star, hinting at the
possibility of a planet in the process of being conceived.
The scientists caution that their findings are not conclusive. The chemical,
a hydrogen molecule with an extra proton (called H3+) could be scattered
throu |
|
s*****t
发帖数: 1994 | 30 No evidence shows that. Sunspots activities will
enhance the brightness of the sunspot area, give
out strong X-ray emissions, and high-energy particles
including electrons and protons. Actually, X-rays
and particles can hardly reach the Earth because of
Earth's atmosphere (actually ionosphere and magnetophere)
will block them out. Particles can interact with
the magnetosphere to form the aurora (or Northern light)
in high latitudes. So, sunspot activity can hardly
change anything on the Earth, e |
|
s*****t
发帖数: 1994 | 31 Aurora From Space
Credit: Don Pettit, ISS Expedition 6, NASA
Explanation: What do auroras look like from space? From the ground, auroras dance high
above clouds, frequently causing spectacular displays. The International Space Station (ISS)
orbits just at the same height as many auroras, though. Therefore, sometimes it flies over
them, but also sometimes it flies right through. The auroral electron and proton streams are
too thin to be a danger to the ISS, just as clouds pose li |
|
s*****t
发帖数: 1994 | 32 A Perseid Aurora
Credit & Copyright: Jimmy Westlake (Colorado Mountain College)
Explanation: Just after the Moon set but before the Sun rose in the early morning hours of
2000 August 12, meteors pelted the Earth from the direction of the constellation Perseus,
while ions pelted the Earth from the Sun. The meteors were expected as sub-sand grains long
left behind by Comet Swift-Tuttle annually create the Perseids Meteor Shower. The aurorae
were unexpected, however, as electrons, protons, |
|
s*****t
发帖数: 1994 | 33 Aurora Over Alaska
Credit: Joshua Strang, USAF, Wikipedia
Explanation: Higher than the highest mountain, higher than the highest
airplane, lies the realm of the aurora. Aurora rarely reach below 60
kilometers, and can range up to 1000 kilometers. Aurora light results from
solar shockwave causing energetic electrons and protons to striking
molecules in the Earth's atmosphere. Frequently, when viewed from space, a
complete aurora will appear as a circle around one of the Earth's magnetic
poles. Th |
|
d*********e
发帖数: 3835 | 34 proton exploded, 777 crashed, 787 caught on fire, what else is going to
happen in the 1/2 half of this month? |
|
h******n
发帖数: 493 | 35 There is no such software. You can calculate the molecular
weight by yourself, then add 1Da (H+) to it. That is what you
usually expect to see from MS analysis. Sometimes, you will
see sodium adduct, instead of proton adduct. In that case,
you have to add 23Da to the molecular weight.
There are some programs to calculate the isotopic pattern
for a molecule. That can help you a little. Just search
"isotopic pattern" in google and you should be able to
find quite a few. |
|
|
C*********m
发帖数: 213 | 37 到了70度，amide proton的交换非常快，用15N标记估计也看不到什么东西。 |
|
p****s
发帖数: 3153 | 38 谁说NMR不能筛药？做SAR的人多的是，不过我是不懂。还有人用NMR做代谢呢。
NMR一个好处是就算解不出结构也能解决一些关键问题，比如最近Influenza M2 proton
channel在nature和science上的
paper，xray没晶体能干毛？NMR还能做细胞里的蛋白，xray不行吧。两个技术的针对性
和特长不同，没法说哪个更好，
只不过xray成功的历史更悠久罢了。说实话NMR想发CNS比xray难多了，我估计主要还是
历史原因。现在最前沿的进展是
可以很快收集NMR数据，甚至可以做real time kinetics，这个常规晶体学方法肯定不
能做到吧。我不懂xray，也没怎么看
过xray文章，所以我不评价xray怎么样，当然了，大家都有辉煌的历史，都在科学研究
中做过巨大的贡献，一个看不起另
一个又何必呢。工业界我不了解，但是我相信NMR也有一席之地，毕竟我老板当时还拿
到过某公司的offer，要说drug
discovery, NMR也是重要方法之一吧，用NMR做GPCR的公司我也听过。 |
|
g********4
发帖数: 4959 | 39 good question. guess nobody knows. If you have a indicator agent, that will
in turn affect the pH since it is a pH sensitive chemical and release/abort
proton when it works. |
|
c****l
发帖数: 1086 | 40 Lots of membrane amino acid transporters has been identified!! You can
easily find a review paper on this like the following one.
Amino Acid Transport Across Mammalian Intestinal and Renal Epithelia
http://physrev.physiology.org/content/88/1/249.short
The transport of amino acids in kidney and intestine is critical for the
supply of amino acids to all tissues and the homeostasis of plasma amino
acid levels. This is illustrated by a number of inherited disorders
affecting amino acid transport in ... 阅读全帖 |
|
c****l
发帖数: 1086 | 41 Lots of membrane amino acid transporters has been identified!! You can
easily find a review paper on this like the following one.
Amino Acid Transport Across Mammalian Intestinal and Renal Epithelia
http://physrev.physiology.org/content/88/1/249.short
The transport of amino acids in kidney and intestine is critical for the
supply of amino acids to all tissues and the homeostasis of plasma amino
acid levels. This is illustrated by a number of inherited disorders
affecting amino acid transport in ... 阅读全帖 |
|
c********r
发帖数: 1125 | 42 这个不算啥啊。。。很多cns文章修改要1年以上。。check this out:
1.Rad51 paralogues Rad55–Rad57 balance the antirecombinase Srs2 in Rad51
filament formation
Nature 479, 245–248 (10 November 2011) doi:10.1038/nature10522
Received 25 September 2009 Accepted 30 August 2011 Published online 23
October 2011
修改了差不多2年。。。
2.Protons Act as a Transmitter for Muscle Contraction in C. elegans
Received: November 21, 2005 Revised: July 7, 2007 Accepted: October 25, 2007
Published: January 10, 2008
也修改了将近2年。。 |
|
|
s******s
发帖数: 13035 | 44 听上去很不错，不知道能不能按时deliver了 |
|
m***T
发帖数: 11058 | 45 抱歉，现在还不能透露过多的信息，只能告诉你ISP以及wells on chips的尺寸都减小
。其实网上已经有不少地方或多或少地透露了一些specifications。 |
|
m***T
发帖数: 11058 | 46 从ION以前表现，它基本上都差不多on schedule。所以我估计即使延迟也不会太长。 |
|
y******8
发帖数: 1764 | 47 Life should be able to do it. More wells in a chip are not a problem for
sequencing speed, and are not hard at all to manufacture.
They only need to make a bigger machine to handle bigger chips. |
|
y******8
发帖数: 1764 | 48 At least, ION should be able to cut the size in half, and make 4x wells in
the same area of current chip.
Optical based sequencing is able to generate reliable basecall with 20 DNA
molecules in a clone. With this number, pH based signal will be very noisy.
If ION put the price tag as 150k for future sequencer, it would be hard to
say which strategy will win in the end. |
|
