| 查看: 430 | 回复: 0 | |||
[求助]
求翻译，ROESY谱方面的，比较急，谢谢了！~~~！！！！！
|
|
求翻译：High resolution 1H-NMR spectra of pregnane glycosides very often display well-resolved signals that can be used as starting points in several selective NMR experiments to study scalar (J coupling), and dipolar (NOE) interactions. ROESY is especially suited for molecules such that ωτc ~ 1, where τc are the motional correlation times and ω is the angular frequency. The ROESY shows dipolar interactions cross peaks even in medium-sized molecules which are helpful in unambiguous assignment of all the interglycosidic linkages. Selective excitation was carried out using a double pulsed-field gradient spin-echo sequence (DPFGSE) in which 180° Gaussian pulses are sandwiched between sine shaped z-gradients. Scalar interactions were studied by homonuclear DPFGSE-COSY and DPFGSE-TOCSY experiments, while DPFGSE-ROESY was used to monitor the spatial environment of the selectively excited proton. Dipolar interactions between nuclei close in space can be detected by the 1D GROESY experiment, which is a one-dimensional counterpart of the 2D ROESY method. The C-12 and C-17 configurations were determined by ROESY experiments. |
回复此楼» 收录本帖的淘帖专辑推荐
 精品翻译集锦 |
» 猜你喜欢
情人节自我反思：在爱情中有过遗憾吗？
已经有6人回复
-
基金正文30页指的是报告正文还是整个申请书
已经有4人回复
-
今年春晚有几个节目很不错，点赞！
已经有6人回复
-
球磨粉体时遇到了大的问题，请指教！
已经有15人回复
-
过年走亲戚时感受到了所开私家车的鄙视链
已经有5人回复
-
江汉大学解明教授课题组招博士研究生/博士后
已经有3人回复