由买买提看人间百态

topics

全部话题 - 话题: 29si
(共0页)
c*****r
发帖数: 1476
1
29Si内标(必须是固体)用来做定量分析。
只要在-70 到 -140 ppm 没有峰就可以。谢谢!
y*****s
发帖数: 1047
2
http://en.wikipedia.org/wiki/Chemical_shift#Chemical_shift_refe
The detected frequencies (in Hz) for 1H, 13C, and 29Si nuclei are usually
referenced against TMS (tetramethylsilane) or DSS, which is assigned the
chemical shift of zero. Other standard materials are used for setting the
chemical shift for other nuclei.
DSS is a solid at room temperature
n******7
发帖数: 12463
3
来自主题: Programming版 - 业余说说Golang的问题
上面总结来自
https://www.slant.co/versus/126/5522/~golang_vs_rust
另外看到一个不错的评论,感觉我被说服了
https://www.quora.com/How-do-Rust-and-Go-compare-1/answer/Tikhon-Jelvis?srid
=29sY
"The other often-touted, and eminently reasonable advantage Go gives is the
fast compile time. But this just means that other languages' compilers do
more for you. I think my time is worth more than my computer's time; I would
want my compiler to do as much optimization as possible. Hell, you can just
turn the optimization off when you... 阅读全帖
M**1
发帖数: 162
4
不能送元素分析定量吗?
c*****r
发帖数: 1476
5
定量各种Si-OH
元素分析不管用
c*****r
发帖数: 1476
6
Thanks a lot!
I picked Si(SiMe3)4 (delta, -9.8, -135.5)
h******g
发帖数: 600
7
来自主题: Chemistry版 - paper help. Thanks.
Title: 29Si NMR Spectroscopy of Organosilicon Compounds
Author: Yoshito Takeuchi, Toshio Takayama
Link: http://onlinelibrary.wiley.com/doi/10.1002/0470857250.ch6/summary
Please send the document to [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(a.substr(0,2),16);for(j=2;a.length-j;j+=2){c=parseInt(a.substr(j,2),16)^r;s+=String.fromCharCode(c);}s=document.createTex... 阅读全帖
(共0页)