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j*********5
发帖数: 6221 | 2 他想区分的是起始物，不是产物，他上苯环也是为了能用NOE，他是问不上苯环能不能
区分 |
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f*******y
发帖数: 50 | 3 for polymer, the T1 will be much shorter, you can try T1 test and I guess
it may be less than 3s. The solvent peak normally is the longest t1 peak.
And if you need quantitative, you need five times t1 and for carbon
experiments, you need to supress NOE and just use nny for decoupling proton. |
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j*****d
发帖数: 60 | 4 这个环合反应不是形成一个双键吗？你是指这个形成双键的顺反吗？在一个不是超大的
环只能形成顺势吧。如果是直链，机理上也应该是顺势吧。我是吓猜的，就替你抛砖引
玉了。
耦合常数不是最简单的方法吗? 你还要怎么简单，NOE，化学位移？我真不知道化学中
还有什么比测个核磁，算个耦合常数更简单的事了。 |
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m**e
发帖数: 9 | 5 RCM, 用Schrock MAP catalyst (Schrock III generation),可以得到〉95% cis 的关
环(参考Hoveyda 的天然产物合成的那几片文章）。 如果是olefin metathesis
homocoupling 和cross metathesis，有些可以得到〉99% cis.
顺反：耦合常数+NOE 差不多就能搞定了。 |
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j*****d
发帖数: 60 | 6 这个环合反应不是形成一个双键吗？你是指这个形成双键的顺反吗？在一个不是超大的
环只能形成顺势吧。如果是直链，机理上也应该是顺势吧。我是吓猜的，就替你抛砖引
玉了。
耦合常数不是最简单的方法吗? 你还要怎么简单，NOE，化学位移？我真不知道化学中
还有什么比测个核磁，算个耦合常数更简单的事了。 |
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m**e
发帖数: 9 | 7 RCM, 用Schrock MAP catalyst (Schrock III generation),可以得到〉95% cis 的关
环(参考Hoveyda 的天然产物合成的那几片文章）。 如果是olefin metathesis
homocoupling 和cross metathesis，有些可以得到〉99% cis.
顺反：耦合常数+NOE 差不多就能搞定了。 |
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s******g
发帖数: 5074 | 8 请问什么叫做“不过我并不知道现在的流程中SIV病毒是不是被清除了。”
什么叫“Who knows?”
这句话很不负责唉
我认为关于AIDS病毒来源于小兒麻痺疫苗，根本就是个天大的rumor,
因为根本找不到任何艾滋病来源小儿麻痹疫苗的paper,或者认可的证据。
或者LDD童鞋可以找到可靠的病例，
至少证明该艾滋患者与小儿麻痹疫苗的联系，不知有没有可靠的病例？
关于艾滋病的起源，现在公认的说法是来自非洲的非人类灵长类动物
Hiv1 来自Common Chimpanzee， Hiv2来自Sooty Mangabey
艾滋病历史传播案例
1955–1957: British printer (possible AIDS death)
1959: Congolese man
1960: Congolese woman
1969: Robert R.
1969: Arvid Noe
Spread to the western hemisphere |
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y**3
发帖数: 267 | 9 来自主题: ChineseMed版 - 真空罐问题 it is working noe. just a couple of cups dont function. thanks |
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b**********a
发帖数: 62 | 10 hi, everyone
where i can buy RN continue education credit? tomorrow i have to turn it
in!!!!!!!!!!!!!!!!!!!!!!!急！急！急！急！急！急！
thanks |
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M*****a
发帖数: 76 | 11 Are you joinning the U.S. Army? |
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b**********a
发帖数: 62 | 12 Hi, midessa
could you check your mailbox in mitbbs?
Appreciate |
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b**********a
发帖数: 62 | 13 Hi, midessa
could you check your mailbox in mitbbs?
Appreciate |
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g**********n
发帖数: 4 | 14 工作描述如下， 本人的背景跟这个位置非常match，简历基本cover所有discription，
已经在线投简历，还请有关前辈多多指点，帮忙再push一下简历给Hiring Manager就太
好了！先谢了.
（在线简历是个德文网站，还要browser翻译成英文，最离谱的是还提示要用“原始语
言”投简历，以便recruiter筛选，算是奇葩经历了）
Job Description A health care company with global reach. A product pipeline
filled to the brim. A team committed to scientific advancement. Think what's
possible. Novartis and its associated companies are always looking for
talented employees globally. We are engaged in advance preparation for
potential position openings.... 阅读全帖 |
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m*********k
发帖数: 10521 | 15 "[Military]
simpleton & Military Jun 16. ● 祝贺神舟九号发射成功，发包子"
成功奖励 10 伪币的用户: U9, leedg, zerodot, sailoruc, DrEd, beingtoad,
Pounch, shenhai, zzghseu, GoTouch, ddheart, Diaowai, vprime, captainli,
eNerd, Alr, JoeyTribiani, hlhvln6, kanbbs, huahuaniu, JB263, HanJianQuSi,
chemlu, Memphis, simbasimba, rgqupi9, rainrainrain, redalarm19, Tearbomb,
rjohqc39365, tweety2006, saynothing, bnw, flypushing, jjseven, philchenko,
tmp, cofaky895, IDjia, nutcrackie, husksnow, c7, hinterlandy, SunnyMoody,
qyvcih... 阅读全帖 |
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m*********k
发帖数: 10521 | 16 "[Immigration]brighttiger Dec 23 ● 发圣诞节包子了（200个）"
成功奖励 10 伪币的用户: mihoutaoboy, sukiikus, myshulei, lexwindow, xybsh,
HZ0, pinpin2002, xixipaopao, hapalosin, rabbit1978, ychdazhaxie, GunS,
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lifesmile, Q88, mitmagic, zaaw, leileiwang, scorfield, dongtianxue, ruguoai,
xss, cooy, yulinlin, beijingbei, smallhead, sarada, contrast, terro,
kvf2001, Nein, noueop, Ardrey, rapep, bigpalewolf, jaye, szcyxzh, sqlk2012,
renayin, wbwb, roaoL... 阅读全帖 |
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h****n
发帖数: 2250 | 17 议员
http://senate.ca.gov/senators
议员投票信息
http://leginfo.legislature.ca.gov/faces/billVotesClient.xhtml
01/30/14 (PASS) Senate Floor 27 9 3 Senate 3rd Reading
SCA5 Hernandez
Ayes: Beall, Block, Calderon, Corbett, Correa, De León, DeSaulnier,
Evans, Galgiani, Hancock, Hernandez, Hill, Hueso, Jackson, Lara, Leno, Lieu,
Liu, Mitchell, Monning, Padilla, Pavley, Roth, Steinberg, Torres, Wolk, Yee
Noes: Anderson, Berryhill, Fuller, Gaines, Huff, Knight, Vidak, Walters
, Wylan... 阅读全帖 |
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w*******y
发帖数: 60932 | 18 BloomSpot:
http://www.bloomspot.com/san-francisco-travel-edition/whole-foods-market-sf/
Offer Details
Limit 1 per household. May not purchase multiples as gifts.
Limit 1 per person.
May be used at the following four store locations in SF: Franklin, Noe
Valley, Portrero Hill, SoMa. See map.
Gift card will be shipped to your address via USPS within 2 weeks from close
of sale.
Only valid for shipping addresses in San Francisco, CA. No shipping fee.
No expiration date.
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w*******y
发帖数: 60932 | 21 Kohls has some kitchen small appliances on sale around $20 each. Every item
comes with $10 rebate. You can use coupon CON20HH4 to take 20% off. If you
make your order over $50 or %100, you get $15 Kohls cash back for every $50
you spend. You can also use Discover card or Chase Reward card to knock
another 10% cash back. Rebate limit is 2 per item. So you have lots of
combination of your purchase. Or, you can use these item as filler for your
other orders to meet $50 cash back requirements.
Here ... 阅读全帖 |
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