s**********o
发帖数: 14359 | 1 那种赛车轮胎特细的，基本没有任何缓冲，
自行车座子又小又硬，当然PG会疼，偶买的
HYDRID，轮胎较大，而且有缓冲弹簧，座子
也相对较大，另外要穿自行车有PAD的紧身短裤，
减少摩擦的损害，偶每次最多骑2个小时，
偶不想加入LIVE STRONG |
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k****r
发帖数: 593 | 2 我们这穿hybrid和one piece一个价， 所以想搞个hydrid穿穿。 |
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b*e
发帖数: 3845 | 3 Anyone tried this string before. It's sold on Ebay and coming from China. I
don't expect it's as good as 100% natural gut, but it's probably equivalent
as many premium multifilament.
80% premier grade natural gut ,10% carbon nanofiber and patented high-tech
fibre, apply thermal tenology – a process of high temperature finishing
that increases the cohesion of the fibre down to the core of the string.
Connect series of nano-elements with the carbon nano-fiber, natural fibre
and patented fibre. The... 阅读全帖 |
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b*e
发帖数: 3845 | 4 在Ebay上bid了high-tech Natural gut string. 从中国寄出，刚用它穿完一支拍子，
现在还不能肯定它是不是crap，从线的弹性角度有点象cheap synthetic，今晚用了后
再报告。
＂80% premier grade natural gut ,10% carbon nanofiber and patented high-tech
fibre, apply thermal tenology – a process of high temperature finishing
that increases the cohesion of the fibre down to the core of the string.
Connect series of nano-elements with the carbon nano-fiber, natural fibre
and patented fibre. The life of string increased by 76%. The surface of
string applied titanium... 阅读全帖 |
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S*********2
发帖数: 172 | 5 你让我很无语。。。
http://www.batteryrecycling.com/Battery+Recycling+Process
Alkaline/Zinc Carbon/Zinc Air Batteries
These batteries are recycled in a specialized “room temperature,”
mechanical separation process where the battery components are separated
into 3 end products. These items are a) Zinc & Manganese Concentrate, b)
Steel, c) Paper & Plastic. All of these products are put back into the
market place for reuse in new products. These batteries are 100% recycled.
Lithium Ion Batteries
Prior to the... 阅读全帖 |
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M******n
发帖数: 43051 | 6 http://proceedings.aip.org/resource/2/apcpcs/228/1/611_1
It is proposed that the core of the Earth where metal hydrides are subject
to high pressure and temperature conditions is a suitable site for ‘‘cold
‐nuclear’’ fusion to proceed. This is compatible with recent experimental
evidence.
，使 |
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G******U
发帖数: 4211 | 7 Properties of Hydrogen
Hydrogen is a nonmetal. It is placed above group in the periodic table
because it has ns1 electron configuration like the alkali metals. However,
it varies greatly from the alkali metals as it forms cations (H+) more
reluctantly than the other alkali metals. Hydrogen‘s ionization energy is
1312 kJ/mol, while lithium (the alkali metal with the highest ionization
energy) has an ionization energy of 520 kJ/mol.
Because hydrogen is a nonmetal and forms H- (hydride anions), ... 阅读全帖 |
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B*********e
发帖数: 86 | 8 【 以下文字转载自 Complain 讨论区 】
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: 【严重投诉20180315】Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////////////////////////////////////////////
http://www.mitbbs.com/article_t/Complain/31350655.html
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[举报] [ 1 ]
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////([em... 阅读全帖 |
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o*****s
发帖数: 1445 | 9 “走在纽约的街头,当你认识到每一个鸽子笼里的住的人都比你成功的时候,当你在街头
看到每一个超级美女,别人却看都不看你的时候,”
我他妈的真的经历过啊。
我当时去一个上交大的朋友那里。结果，她告诉我底下那老头是华尔街金融服务业的，
就是早上站50多街口那买donuts。就这么一个家伙，家里一栋queens的物业，我靠，
zillow上值100万。再加上，还有一个hydrid的suv，一个MBs500。这还只是华尔街金融
服务业，就是早上卖早点的。
往下，咳，还真是没人掉哈。不信你去那个离chiatown很近的soho。里面周末晚上呼呼
的美女。
这种体会，这种阶级感情，真不是混中部的能体会的。有人说那个tony心理素质很强。
据说去泡妞，当场给人女生羞辱。就是类似那个20，30万一年的纽约大姐的话：我老公
至少要收入比我强1.5倍。
人家tony一听，转身去泡别的女生。
真的，原来都是不同人生，同样的经历。
我们一定要努力，不放弃，不抛弃，加油，加油，加油啊！5块一加仑都要加爆。 |
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d*****n
发帖数: 599 | 10 文章：
19. W. -Q. Deng, A.H. Flood, J.F. Stoddart, and W. A. Goddard, “
Electronic paper display design based on a tristable [2]catenane,” Journal
of the American Chemical Society. 2005, 127, 15994-15995. (download pdf)
18. S. Cheung, W. -Q. Deng, A.C.T. van Duin, and W. A. Goddard, “
ReaxFF: MgH reactive force field for magnesium hydride systems,” Journal of
Physical Chemistry A. 2005, 109, 851 - 859. (download pdf )
17. K. Nielson, A.C.T. van Duin, J. Oxgaard, W. -Q. Deng, and W. |
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h*******x
发帖数: 12808 | 11 完全不知所云
大牛普及一下。
Sodium Hydride
Peking University, Shenzhen, China 518055
NaH) as an oxidation promoter have long been overlooked. Uncovered here are
some unprecedented reactivities of this classical reagent under very mild
conditions, including alco |
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s*****s
发帖数: 1130 | 12 It is not hybrid, and it should be cleaner than hybrid. Ideally, it will only
produce water.
Honda civic hydrid is more efficient than normal honda civic, especially when
you drive in the city instead of free way. It consumes about 1/3 less
gasoline.
any
汽
批
他
。 |
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s*****s
发帖数: 1130 | 13 honda civic hydrid costs about $3000 more than a normal honda civic. The other
problem is that the battery needs to be changed in the 8th year, which is
about $2000.
the
to
via
future?
国
为
理 |
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z***t
发帖数: 10817 | 14 If you frequently drain and then recharge a lithium-ion battery, it can
quickly lose its ability to hold a charge. The practice of completely
draining and then fully charging a battery is advice that applied to
nickel cadmium (NiCd) batteries and, to a lesser extent, nickel metal
hydride (NiMH) batteries. Lithium-ion batteries last longer if you
charge them often, a little at a time, to maintain a minimum charge of
about 40 percent capacity.
我还总是用尽再充爆。 其实应该每天用一多半再充。
那和卸掉电池，每周充一次，哪个方案好呢？ |
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e*****t
发帖数: 642 | 15 that's why microarray is dying. Hydridization always gives u low signal/
noise ratio, which is hard to overcome in some sense. Sequencing may have
bright future even error rate is still high so far. |
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e*****t
发帖数: 642 | 16 that's why microarray is dying. Hydridization always gives u low signal/
noise ratio, which is hard to overcome in some sense. Sequencing may have
bright future even error rate is still high so far. |
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p*****h
发帖数: 36 | 17 The gas is H2. Proton (H+) reacts with hydride (H-) in NaBH4, giving H2 gas.
If alkaline pH is not a problem for your applications, less NaBH4 would be
consumed in an alkaline buffer. Nevertheless, NaBH4 is usually in such an
excess that the side reaction with water will not affect your experiment. |
|
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p****e
发帖数: 254 | 19 看机理的内容首先是碱和醇反应生成氢气和烷氧基负离子，随后理论上应该离去一个负
氢才能完成生成酮的过程，这个是俺想不通的一点。这个过程是不是需要一些辅助才能
发生，比如体系里有微量的氧化剂来攫取负氢，或者体系里有微量过渡金属，那么可以
发生b-hydride elimination。 |
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n*****t
发帖数: 32 | 20 什么是hydride acceptor? Na+?
are |
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p****u
发帖数: 239 | 21 Reductive and Transition-Metal-Free: Oxidation of Secondary Alcohols by
Sodium Hydride [J. Am. Chem. Soc. DOI: 10.1021/ja904224y]. Xinbo Wang,
Bo Zhang, and David Zhigang Wang*
This manuscript has been withdrawn for scientific reasons.
JA910615Z
10.1021/ja910615z |
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S*****n
发帖数: 6055 | 22 好多学化工的人连个碳正离子重排里头hydride shift还是methyl shift都弄不清楚，
好多petrochemical里头的反应自然更是搞不来了。。。 |
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f****y
发帖数: 231 | 23 从结构看Red-Al有两个hydride，是不是一分子Red-Al能最多能还原两分子酮？ |
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o*****o
发帖数: 113 | 24 Article Title:
Photodetachment of some diatomic negative hydride ions beryllium
monohydride(-), magnesium monohydride(-), calcium monohydride(-), zinc
monohydride(-), phosphorus monohydride(-), arsenic monohydride(-)
Author:
Rackwitz, R
Journal Title:
Zeitschrift fuer Naturforschung, Teil A: Astrophysik, Physik und
Physikalische Chemie
ISSN:
0044-3166
Published:
1977 Volume: 32A Issue: 6
could you send it to i*****************[email protected]
thank you! |
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c*********k
发帖数: 20696 | 25 一个以Pt,Pd为中心的系列的新化合物的合成，哈哈
后来合成了一个东西，在1H NMR上大概-17的地方有很好的峰
这个东西能直接常温常压下加H2，得到di-hydride |
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j*********m
发帖数: 33 | 26 there is metal hydrogen bond, hydride is very active in water, so I think
the idea is somehow wired. For metal cluster, I think water would be a
better choice, for oxides, maybe hydrogen. |
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S*****n
发帖数: 6055 | 27 it depends
there are occations that gas could have higher solubility
for example, hydride formation
another example, MOF
子形式溶解)，我觉 |
|
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F****I
发帖数: 270 | 29 首先，定义就是定义，只要是自洽的，只有接受不接受，是不是行业普遍接受的。
#9 算符的local与否，这里的local按Parr&Yang (2.1.24)的定义，和L(S)DA/GGA无关
。LDA的定义是
E_{xc}^{LDA}[\rho]=\int \rho(r) \varepsilon(\rho) dr (Parr&Yang的7.4.1)
包括后续的GGA,(8.7.1)等，在数学上很容易验证他们对应的算符都是local的，因为
LDA/GGA的泛函形式不存在HF里交换算符的情况。
然后，是Kohn-Sham方案的定义:
按Parr&Yang p146, v_eff(r) is a local operator in the sense of (2.1.24).
这个问题来自于，如果一个人从头到尾完整推导Kohn-Sham scheme（暂时不考虑non-
interacting v-representability), 对应的potential operator只能是local的。
我没有引进对KS scheme推广和修正的定义。我做的判断是,B3LYP等hydrid fu... 阅读全帖 |
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g********0
发帖数: 749 | 30 谁知道DIBAL-H的 pKa 值大约是多少？能有出处最好了
wiki上有一句话，关于DIBAL的：
Hydrides are small and, for aluminium derivatives, are highly basic,.... |
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g********0
发帖数: 749 | 31 谁知道DIBAL-H的 pKa 值大约是多少？能有出处最好了
wiki上有一句话，关于DIBAL的：
Hydrides are small and, for aluminium derivatives, are highly basic,.... |
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y*****s
发帖数: 1047 | 32 You should check the pKa of H2 and malonate, if your question is can hydride
deprotonate malonate. |
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b****n
发帖数: 379 | 33 Synthesis of alkyl- and cycloalkylamines by hydroamination
Science of Synthesis (2009), 40a, 241-304. Publisher: (Georg Thieme Verlag）
An efficient method for the synthesis of 2,3-dihydro-1H-isoindoles
Indian Journal of Chemistry, Section B: Organic Chemistry Including
Medicinal Chemistry (2009), 48B, (4), 545-552.
http://onlinelibrary.wiley.com/doi/10.1002/0471264180.or036.03/
DOI: 10.1002/0471264180.or036.03
Málek, J. 2004. Reductions by Metal Alkoxyaluminum Hydrides. Part II.
Carboxylic Acids... 阅读全帖 |
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h***o
发帖数: 350 | 34 The Electrochemistry of Metallic Nickel: Oxides, Hydroxides, Hydrides and
Alkaline Hydrogen Evolution
David S. Hall,
Christina Bock and
Barry R. MacDougall
doi: 10.1149/2.026303jes
J. Electrochem. Soc. 2013 volume 160, issue 3, F235-F243
Link:
http://jes.ecsdl.org/content/160/3/F235.abstract
Thank you very much. |
|
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m********n
发帖数: 21 | 36 请问hydride control是指用状态机来实现那种，离散事件控制吗？ |
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z***x
发帖数: 9 | 37 来自主题: Macromolecules版 - talk-4 Chain Walking produces Branches.
Zhibin Guan, Dupont CR&D,
Science, 283, 2059, 1999
a palladium-diimine catalyst catalyze ethylene polymerization.
利用late transition metal的b-elimination, hydride addition 实现chain walking
process.
通过调节气压改变的chain-walking 和polymer chain propagation
的速度从而实现tuning
polyethylene topology with pressure which can form linear PE to Dendritic PE.
It is very promising to make dendrimer by simple conventional polymerizaiton
method instead of tedious multi-step synthesis. |
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a***n
发帖数: 578 | 38 there are several types of fuel cells.
the most mature one is proton exchange membrane fuel cell (PEM)
the difficulties right now are at several parts:
1. hydrogen storage
2. membrane design
3. catalyst
How to reduce the price of fuel cell is most concern.
1. The most advance materials for hydrogen storage materials.
metal hydride nanoparticle: 5% mass amount
carbon nanotubes: (suspected) 8%
high pressure tank with polymer inside wall above 200 bar.
target is 6.5%
another proposal |
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n*****j
发帖数: 22 | 39 文章中提及 'dried over calcium hydride, and cryo-transferred prior to use'.
不知在实验中是如何操作的？还请各位指教！
谢谢 |
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z*******o
发帖数: 136 | 40
在单体中加些calcium hydride搅拌一天，然后搭个减压蒸馏装置，把单体冻起来抽真
空后，再慢慢融化单体，收集用的瓶子用液氮冻一下，单体就会自动过去了。 |
|
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B*********e
发帖数: 86 | 42 ///////////////////////////////////////////////////////
http://www.mitbbs.com/article_t/Complain/31350655.html
[回复] [回信给作者] [本篇全文] [本讨论区] [修改] [删除] [转寄] [转贴] [收藏]
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发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////([email protected] GMT)///////////////////
【 以下文字转载自 Faculty 讨论区 】
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Faculty
标 题: Re: authorship求教，被学生耍了
发信站: BBS 未名空间站 (Thu Mar... 阅读全帖 |
|
B*********e
发帖数: 86 | 43 【 以下文字转载自 Faculty 讨论区 】
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Faculty
标 题: Re: 标 题: Re: 求建议，回国还是留下
发信站: BBS 未名空间站 (Fri Feb 1 15:23:11 2019, 美东)
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发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Faculty
标 题: Re: 求建议，回国还是留下
发信站: BBS 未名空间站 (Fri Feb 1 15:03:14 2019, 美东)
(2019-01-29#2013)
to sunnyan (羊妈妈)和爱人__to （water77 (水)__mitbbs发考题版__mitbbs发考题版
_2019-01-25#0015-0439__s#0440__1840-2333__01-26#1852-... 阅读全帖 |
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x*b
发帖数: 5723 | 44 现在普通版还不确定最终是锂电池还是保持nickel-metal-hydride电池，但是貌似有大
幅的减重所以也许真的全面升级了锂电池也不一定。另外引擎方面做了一些调整和优化
，据说达到了40% Thermal Efficiency。 |
|
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w*******y
发帖数: 60932 | 46 Linky:
http://shnoop.com/
Brand new AAA rechargeable batteries
1.2V 800mAh cells
Advanced Nickel Metal Hydride technology
Considerably longer run time than conventional Nickel Cadmium batteries
The only NiMH rechargeable system that works in 15 minutes
I-C3 batteries can be recharged up to 1,000 times
The I-C3 technology puts the control of recharging into the battery instead
of the charger
No memory effect means batteries can be recharged at any time, even when
only partially drained
Batteries |
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