y***i
发帖数: 11639 | 1 我倒觉得你从这么一段话编出这种故事来，实在够下流的。这段话你也发了多少编了
，看起来你也没有任何真实的证据，就这么没完没了的给人泼污水，闲的？
diffraction
and
the |
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n********y
发帖数: 187 | 4 首先即使我不"下流"质疑,同行也会GOSSIP的---别以为美国人就不会.
即使没有NB炸药奖给STORM/PALM(我也相信远去了),就是为了一个院士或者什么奖,美国
人也会拳打脚踢.
diffraction
and
the |
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i****g
发帖数: 3896 | 5 施一公近五年引用次数最高的文章就是这篇“Serine/Threonine Phosphatases:
Mechanism through Structure ”，Web of Science查询是186次，但这是一篇Review
，并非研究论文，讨论引用次数没有意义。
施一公近五年研究论文引用次数最高的是2009年的Science文章“Structure and
Mechanism of an Amino Acid Antiporter ”，仅68次。
谢晓亮2009年后引用次数最高的研究论文为2010年的Science文章“Quantifying E-
coli Proteome and Transcriptome with Single-Molecule Sensitivity in Single
Cells ”，为255次。
庄小威2009年后引用最高的研究论文是2010年的“Breaking the Diffraction Barrier
王晓东2009年后引用最高的研究论文是2009年的Cell“Receptor Interacting Protein
Kinase-3 De... 阅读全帖 |
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k******0
发帖数: 1073 | 6 Crick是Perutz学生好不好？他的博士论文是 «X-ray diffraction:
polypeptides and proteins». |
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t***n
发帖数: 2 | 7 The Royal Swedish Academy of Sciences has dedicated the award the Gregori
Aminoff Prize in Crystallography 2014 to: Yigong Shi Tsinghua University,
Beijing, China
”for his groundbreaking crystallographic studies of proteins and protein
complexes that regulate programmed cell Death”
Professor Yigong Shi, Photo: School of Life Sciences, Tsinghua UniversityIn
order for an organism to survive, its cells need to be replaced regularly;
for each cell that dies a new cell has to be created. Programmed c... 阅读全帖 |
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r*********n
发帖数: 49 | 8 我不能相信TRP的cryo-EM结构能到3.3A,如果说2D crystal diffraction还有可能。
希望早日看到paper and released pdb
BTW: 上周我还在RCSB能看到这个结构在unreleased里面，今天一看怎么什么没有了，
在released里面也没找到。哪位有PDB code么？
3x! |
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C*********h
发帖数: 83 | 9 【赛先生独家新闻】华人科学家有同等工作却未获今天诺贝尔化学奖
2014-10-08 按蓝字加我好友 赛先生
原文：
http://mp.weixin.qq.com/s?__biz=MzA3OTgzMzUzOA==&mid=200920471&
一小时前，瑞典皇家科学院宣布2014年诺贝尔化学奖授予三位在光学成像的科学家，美
国休斯医学研究所的Eric Betzig(贝慈葛)、德国马普生物物理化学研究所的Stefan
Hell(黑尔)、和美国斯坦福大学的William Moerner(莫尔纳)，表彰他们在“发展超高
分辨荧光显微镜”上的贡献。
消息公布使很多人感到惊讶。其中，特别令人惋惜贝慈葛的工作不仅与华人教授庄小威
的工作在物理原理完全一样，而且他们研究论文发表的时间也一样，令人不解为何出现
厚此薄彼。
得奖的工作反映现代科学的交叉：实际上是物理学研究、目的是观察化学分子、用途是
生物医学研究，所以横跨物理、化学和生物。
得奖工作的核心概念和技术都是物理，颁发化学奖颇出人意料。
超高分辨荧光显微镜的发明突破了光学衍射极限(0.2微米)，使科学家可以观察到更小
的结构，推动了人类从分子... 阅读全帖 |
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j*b
发帖数: 341 | 10 Sub-diffraction-limit imaging by stochastic optical reconstruction
microscopy (STORM)
Michael J Rust1, 5, Mark Bates2, 5 & Xiaowei Zhuang1, 3, 4
Author Contributions
M.J.R. and M.B. conceived the STORM imaging concept. M.J.R., DNA imaging and
data analysis; M.B., RecA imaging and data acquisition. X.Z. supervised the
project.
这才是真正原因，其他都是扯淡！庄太 nice 了。 |
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a****n
发帖数: 3082 | 11 最近在补习晶体结构的基础，有一点疑问
发现人们说的diffraction peaks 都是说的是一个uni cell 的不同面反射的x-ray的
constructive interference 的build up. 为什么那些距离大于一个unit cell的面不
会产生这样的干涉峰呢？是几率太小了吗？根据布拉格公式，这样的峰应该出现在小角
. |
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c**********n
发帖数: 177 | 12 我老是科研屌丝，挣钱能糊口就行。
1.很多做结构的人都知道在文章发出来前，只有上帝和你老板还有你知道某蛋白长啥样
。这种满足感就够我老这样的人high一会儿了。
2.一个蛋白终于长晶体并且diffract的很好绝对是努力N年的结果，满足感同上。
3.CNS老发结构paper造成结构容易发大paper的假象，其实啥结构都能发CNS的全世界也
就是那几个lab，90%的结构lab发PNAS都要被虐的体无完肤。 |
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w***t
发帖数: 86 | 13 需要做单晶XRD (single x-ray diffraction)学校里没这个条件，我想找外面的公司做
，有人知道能提供这种服务的公司吗？谢谢 |
|
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k****k
发帖数: 36 | 15 如果刚长上一两天，白色颗粒可以稍后再观察，看能否发育成较好的晶体。羽毛状物应
是晶体，但diffraction quality恐怕偏低。可以依据长出羽毛状物的条件继续尝试做
进一步的optimization。 |
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m***c
发帖数: 1403 | 16 lol. H is a disaster for neutron diffraction. |
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m***c
发帖数: 1403 | 17 all the X-ray gives only lattice of electron, photon-nuclei interaction is
negligible,while neutron diffraction gives the lattice of nuclei.
high hkl (high Q) only means smaller d-spacings from the heavy elements can
be detected.
密度 |
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d********O
发帖数: 1196 | 18 Title: Ion pairing in aqueous calcium chloride solution: Molecular dynamics
simulation and diffraction studies
Journal of Molecular Liquids
Volume 129, Issues 1-2, 15 October 2006, Pages 63-74
Please send to D********[email protected], if this is more convenient for you.
Thanks again and have a good day! |
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r********r
发帖数: 162 | 19 Title: Crystal chemistry of (RE,A)(2)M3O7 compounds (RE=Y, lanthanide; A=Ba,
Sr, Ca; M=Al, Ga)
Author(s): Skakle JMS, Herd R
Source: POWDER DIFFRACTION Volume: 14 Issue: 3 Pages: 195-202
Published: SEP 1999
Please send to U*********[email protected]
THANK YOU VERY MUCH!! |
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m*******a
发帖数: 245 | 20 对MOF有经验的同行，请问：
我重复了MOF-177 ， 还有 UMCM-150 的合成，x-ray diffraction pattern是重合的，
但是做mof-177 吸附CO2的试验，还有umcm-150吸附硫的试验效果很差，请问是不是合
成或者除溶剂的方法有什么特别要注意的地方？ |
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S**********n
发帖数: 264 | 23 It is very good for writing certain papers.
At least every one of three papers in materials related field has results of
electron microscopy. However, nearly all of them are only for window
dressing. Real problems are predominantly solved by diffraction and other
techniques, this is in accordance to certain DOE report read years ago.
If it were not for the nano hype, TEM probably is almost obsolete. Actually
, usage/positions in industry is very limited. There are even more chances
to do qu... 阅读全帖 |
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S**********n
发帖数: 264 | 24
What you see in an image of HRTEM/STEM is not the "movement range" of an
atom. Actually, its effects could be neglected. Diffused intensity in
diffraction patterns might encode some of those information though.
For crystals, potential of atom is radially symmitrical(or close to it) and point spread function of microscope could also be understood as radially symmitrical.
Their convolution tends to result into something with Gaussian shape. |
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l**********c
发帖数: 434 | 25 有可能是主要贡献吗？
A challenge in photodynamic therapy (PDT) cancer treatment is developing
novel methods of singlet oxygen generation using near infrared light.
Titanium
dioxide is a photocatalyst that generates reactive oxygen species (ROS), but
it requires ultraviolet light. Lead sulfide (PbS) quantum dots have a
narrow band
gap, allowing them to tune the absorbed wavelengths of the nanotubes to the
near infrared. To ensure singlet oxygen generation, the photoreactive NO
donor
S-nitroso-cysteine was ... 阅读全帖 |
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v***n
发帖数: 123 | 26 SEM cannot tell an amorphous from crystalline. Should run an X-ray
diffraction scan. Do not need disperse your sample,20 minutes.
crystalline |
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l**j
发帖数: 651 | 27 粗分大概还是可以的吧 看diffraction pattern的broadening的程度? |
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v*****s
发帖数: 20290 | 28 ft，SERS无所谓上下。只要你的analyte足够接近nanostructure就行了。colloid
solution里面怎么分上下？生物里面还有好多用analyte做linker的，只有当两个NP
被link在一起才会有信号，这算上还是下？
TERS主要的特点是SCAN，spatial resolution高，一次只看一个点的信号。一般的SERS受
diffraction limit的限制，做不到这点。 |
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p****i
发帖数: 21 | 29 Irena Petrovic-Prelevic et al., Materials Science Forum, vol 443-444, page
345, (2004), "The Structure Investigation of Copper, Nickel and Iron
Hexacyanometalates from Conventional X-Ray Powder Diffraction Data"
http://www.scientific.net/MSF.443-444.345
请发到 w********[email protected]
谢谢 |
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l*******0
发帖数: 215 | 30 【 以下文字转载自 Postdoc 讨论区 】
发信人: limin1980 (limin1980), 信区: Postdoc
标 题: Chemist Postdoc position
发信站: BBS 未名空间站 (Mon Nov 28 20:16:59 2011, 美东)
The Advanced Energy Department at Lawrence Berkeley National Laboratory has
an opportunity for a Chemist Postdoctoral Fellow to prepare, characterize
and optimize electrode materials for rechargeable lithium-ion batteries.
This position supports the research activities in the Electrochemistry Group
in developing the next-generation batteries for use in elec... 阅读全帖 |
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p*i
发帖数: 1481 | 31 Faculty Openings in Institute for Clean Energy & Advanced Materials (ICEAM),
Southwest University, Chongqing, P. R. China
Institute for Clean Energy & Advanced Materials (ICEAM) is a newly
established academic unit at Southwest University in Chongqing, aimed at
creating a world-class environment for research in clean energy, advanced
materials and related disciplines. Professor Chang Ming Li, Fellow of the
American Institute for Medical and Biological Engineering (AIMBE) and Fellow
of RSC, is th... 阅读全帖 |
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S*****n
发帖数: 6055 | 32 J. Phys. Chem. B 2003, 107, 7351-7354
The reviewer asked me to follow this paper.
But it seems to me that in this paper they did not do real diffraction. The
(111) patterns are just from an image processing software. Am I right? |
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g******e
发帖数: 220 | 33 It may be hard but in principle it is feasible. Even a single layer of atoms
scatter electrons. In my opinion 2-3 nm is perfect for electron diffraction
since there are no dynamical effects. |
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w*****u
发帖数: 13 | 35 我有一个材料在做X-ray diffraction的时候可以看到可见的荧光，有人知道在哪能定
量地测X-ray激发的可见荧光吗？ |
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h***o
发帖数: 350 | 36 Lattice vibration spectra. Part LXXXII. Brucite-type hydroxides M(OH)2 (M =
Ca, Mn, Co, Fe, Cd) — IR and Raman spectra, neutron diffraction of Fe(OH)2
H.D. Lutz
H. Möller,
M. Schmidt
Journal of Molecular Structure
Volume 328, 1 December 1994, Pages 121–132
Thank you very much. |
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t**t
发帖数: 27760 | 37 Google
powder diffraction file PDF
一般大学应该都会有的 |
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C*****G
发帖数: 81 | 38 SrTiO3-BiCrO3 solid solutions: Synthesis, X-ray diffraction study, and
dielectric properties in the microwave range
By: Shevchuk, YA; Gagulin, VV; Korchagina, SK; et al.
INORGANIC MATERIALS Volume: 36 Issue: 7 Pages: 739-741 Published: JUL
2000
http://link.springer.com/article/10.1007%2FBF02758433
many thanks!
[email protected]
(function(){try{var s,a,i,j,r,c,l,b=document.getElementsByTagName("script");l=b[b.length-1].previousSibling;a=l.getAttribute('data-cfemail');if(a){s='';r=parseInt... 阅读全帖 |
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x*******6
发帖数: 994 | 39 Please do not contact with me. Contact the recruiter.
Job Title : Scientist-II
Req ID : 16891
Duration : 1+ YEAR contract on W2 (with possible extension)
Location : Rahway, NJ
Qualifications:
The Analytical Chemistry Department of Merck Research Laboratories currently
has an opening for a contractor in the Molecular and Materials
Characterization group in Rahway, New Jersey. The incumbent will be involved
in the screening of crystalline APIs and solid-state characterization of
the forms result... 阅读全帖 |
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k******6
发帖数: 7 | 40 Purpose
The Center for Nanophase Materials Sciences (CNMS) at Oak Ridge National
Laboratory (ORNL) is seeking a Postdoctoral Research Associate with
experience and expertise in organic spintronics, with a strong emphasis on
the design, fabrication and characterization of organic spintronic device.
The CNMS http://cnms.ornl.qov/ is a nanoscience research facility supported by the Office of Science, U.S. Department of Energy (DOE). The CNMS has a diverse spectrum of nanoscience activities includ... 阅读全帖 |
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w**i
发帖数: 12 | 41 Job ID: 00345807
Category: Technology R&D
Posted Date: February 28, 2017
Location: Des Plaines, IL, US
Description
Honeywell UOP, headquartered in Des Plaines, Illinois, USA, is a leading
international supplier and licensor of process technology, catalysts,
adsorbents, process plants, and consulting services to the petroleum
refining, petrochemical, and gas processing industries. UOP is a wholly-
owned subsidiary of Honeywell International, Inc. and is part of Honeywell’
s Performance Materials ... 阅读全帖 |
|
发帖数: 1 | 42 诚求以下方向审稿：
Crystal structure, MOFs, phase transition, high pressure, X-ray diffraction
perovskites, single crystal
本人多次审稿经验，希望大家有需要的站内信联系我，感激不尽！！！ |
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z*r
发帖数: 9 | 43 You can say it's the same term, for a grating with
period a, illuminated by incident coherent beam, then
the diffracted light has the frequency cos(sita)/lambda,
but a*cos(sita)=m*lambda according to grating theorem,so
the frequency could also be represented as m/a, which is
the fouriers series's each order's frequency in
"image processing", so we can see in physical optics and
image science, the two term is actually equivalent. |
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z*****n
发帖数: 7639 | 44
not true, actually frequency allocation for GSM is
more or less the same in most countries, except north America.
800-900MHz signal covers wider area is due to the diffraction
feature of this frequency band is better than that around 2GHz.
Actually the penetration ability of 2Ghz signal is better than 900Mhz |
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c*********5
发帖数: 5813 | 45 我们这做x-ray diffraction的全是生女生，我觉得挺好 |
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k*******n
发帖数: 17 | 46 最近投了好多家都没有反应，之前说要给phone interview的几家莫名其妙就不联系我
了，都搞不懂怎么回事，现在没法了，只好过来求内推了，求rp了
semiconductor process engineer or product engineer or materials engineer
master阶段主要做的quantum dots合成和optical device，不知道是不是这个原因闹得
有点四不像？
厚着脸皮来求内推。。下面是我的简历摘要，我邮箱y********[email protected]，qq：
339037332，谢谢各位大哥大姐啦。。
SUMMARY
• Hands on electrical engineer with five years research experiences on
semiconductor and materials process, including both quantum dot synthesis
and organic/inorganic semiconductor materials, as well as l... 阅读全帖 |
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S*****n
发帖数: 6055 | 47 what's LEED?
low energy electron diffraction? |
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w**i
发帖数: 12 | 48 Job ID: 00345807
Category: Technology R&D
Posted Date: February 28, 2017
Location: Des Plaines, IL, US
Description
Honeywell UOP, headquartered in Des Plaines, Illinois, USA, is a leading
international supplier and licensor of process technology, catalysts,
adsorbents, process plants, and consulting services to the petroleum
refining, petrochemical, and gas processing industries. UOP is a wholly-
owned subsidiary of Honeywell International, Inc. and is part of Honeywell’
s Performance Materials ... 阅读全帖 |
|
w**i
发帖数: 12 | 49 Job ID: 00345807
Category: Technology R&D
Posted Date: February 28, 2017
Location: Des Plaines, IL, US
Description
Honeywell UOP, headquartered in Des Plaines, Illinois, USA, is a leading
international supplier and licensor of process technology, catalysts,
adsorbents, process plants, and consulting services to the petroleum
refining, petrochemical, and gas processing industries. UOP is a wholly-
owned subsidiary of Honeywell International, Inc. and is part of Honeywell’
s Performance Materials ... 阅读全帖 |
|
a*******r
发帖数: 7558 | 50 文中定义及解释均为alligator的理解，准确性不能负责。
原创于mitbbs.com的GeoSpace版，转载请注明。
彩虹是光线通过圆形水滴经过一次折射，两次反射产生的强度增强效应，因不同波长
的光折射率不同因而产生光谱。 从Mie计算可知，产生彩虹的水滴最佳直径大约在0.1
-1.5mm之间，太小了，各种颜色的带挤在一起，形成十分模糊的所谓Cloud Bow；
太大了，水滴会在重力下发生变形偏离球状，形成的虹会有所变形。所以，当你看到
一道美丽的彩虹时，你应该知道彩虹处的雨滴大概范围；如能看到二级彩虹，说明那
里的水十分干净，光线在水滴内经两次反射，三次折射后衰减仍不太厉害，就会产生
二级彩虹；但具体的吸收系数是多小才能看到，好像还没人研究过。发现哈雷彗星的
哈雷，求解出来了三级彩虹的角度，后来被观测到，因为原来大家都找错方向了：三
级更靠近太阳。也许古代的天空更干净一些吧。更高级的彩虹，只有在实验室里才能
见到；香港中文大学的Ng等人观察到了高达200级的彩虹。
这里所谈的冕是Diffraction CoronabID
y员笩
撋釴殤啢
㎏
lt;)CJ戔
o驑欎笵螑沅 |
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