Hi, I was asked to study polyethylene degradated by gamma and Xrays. I planed to measure relaxations rates, but which one is the most relevant to highlight chain degradation? T1, T2, but on 1H or 13C? By reading some articles, I feel T2 is not very interesting, right? T1rho experiments seems to give good results, I have found 2 sequences in Bruker's library, T1rhoX (CP step then variable length spin lock pulse on 13C channel) and T1rhoH (CP step then variable length spin lock pulse on 1H channel), and there is also the more classical variable contact time experiment, I don't know which one to use... Is there a more relevant relaxation rate to measure or should I try all of them and see which one gives good results ? I was also asked to study wood degradation in the same way. I have started to look for bibliography, but if anyone can suggest interesting articles... Thanks Anne
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[Question from NMRWiki Q&A forum] How to study polymer degradation by gamma and X-Ray radiation?
How to study polymer degradation by gamma and X-Ray radiation?
Hi, I was asked to study polyethylene degradated by gamma and Xrays. I planed to measure relaxations rates, but which one is the most relevant to highlight chain degradation? T1, T2, but on 1H or 13C? By reading some articles, I feel T2 is not very interesting, right? T1rho experiments seems to give good results, I have found 2 sequences in Bruker's library, T1rhoX (CP step then variable length spin lock pulse on 13C channel) and T1rhoH (CP step then variable length spin lock pulse on 1H channel), and there is also the more...
[Question from NMRWiki Q&A forum] Examples of protein degradation eg HSQC?
Examples of protein degradation eg HSQC?
Anyone know any websites or papers that show protein degradation in an HSQC for example? I wanted to know what to look for in old samples when I have them. Either that, or could someone put one up on the wiki for me to look at?
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08-22-2010 02:30 AM
[NMR paper] Hydration of fibrinogen, fibrin, and fibrin degradation product (FDP) as estimated by
Hydration of fibrinogen, fibrin, and fibrin degradation product (FDP) as estimated by nuclear magnetic resonance (NMR) spectroscopy.
Related Articles Hydration of fibrinogen, fibrin, and fibrin degradation product (FDP) as estimated by nuclear magnetic resonance (NMR) spectroscopy.
Blood Coagul Fibrinolysis. 1991 Apr;2(2):243-9
Authors: Tanaka Y, Nakaya S, Yoshioka Y, Yoshida Y, Hanaoka H, Kawamura R, Yasuda N
The relaxation times (T1 and T2) of water proton in nuclear magnetic resonance (NMR) were measured with solutions containing bovine...
study of polymer degradation
Linear Mode
