What is radiation damping?

1 1 21677
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What makes very strong signals broader - just due to the interaction of the sample with the detection coil - what is the...
Posted: Evgeny Fadeev 5771 / Updated: Kirk Marat 711 Feb 08 '10 at 05:47

Absorption of RF energy quantum and change of the nucleus spin state

1 0 7k
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Is a quantum of energy such as that in transverse RF field produced by NMR probe absorbed instantaneously by a single nu...
Updated: Evgeny Fadeev 5771 Jan 26 '10 at 13:42

NMR experiments to assign aromatic sidechains?

3 1 7k
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Hello, may I ask this - NMR experiments/pulse sequences are available to assign aromatic sidechains - Phe, Tyr, Trp? We'...
Posted: anita 31 / Updated: roseyp 46 Feb 22 '11 at 09:38

Example of XPLOR NMR structure with unnatural custom residues

0 2 2k
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Hi there! Could anyone share an example of NIH-XPLOR files for annealing of NMR structure with non-natural residues. May...
Updated: anita 31 Jan 19 '10 at 11:40

Please suggest experiments that push the power limits of NMR probes

5 1 7k
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I'm trying to come up with reasonable tests of probe performance for all channels by simulating conditions at which arci...
Posted: Evgeny Fadeev 5771 / Updated: SankarampadiAravamudhan 91 Oct 22 '10 at 01:56

Using probe that started losing B1 strength or has longer 90 degree pulse

1 0 4k
answers votes views
I've found that one of our probes lost ~1.5-2 dB of power on 13C, but nutation curve looks OK. There are no random spike...
Posted: Evgeny Fadeev 5771 / Updated: Joseph DiVerdi 146 Apr 19 '10 at 18:07

What may cause lock level depend on pfgon setting in vnmr?

2 1 4k
answers votes views
Hello, I've been working through the probe performance tests and noticed that when I change pfgon='yyy' to pfgon='nyn' l...
Posted: Evgeny Fadeev 5771 / Updated: Jerry Hirschinger 199 Sep 28 '10 at 12:12

How to set NOESY mixing time in intermediate tumbling regime

1 0 6k
answers votes views
I need to run noesy for a monomeric peptide of about 1.5kDa at 800 MHz 1H frequency. NOE peaks are weak at 100 ms mixing...
Posted: Evgeny Fadeev 5771 / Updated: sekhar Talluri 621 Feb 13 '10 at 12:00

How to use network analyzer or oscilloscope to tune and match NMR probe?

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answers votes views
Hello, could someone share directions on how to tune and match NMR probe RF circuit using a network analyzer? We have a ...
Posted: Evgeny Fadeev 5771 / Updated: Kirk Marat 711 Jan 14 '10 at 11:51

How to extract Bruker fid data - in topspin and xwinnmr - to ascii format?

4 1 17926
answers votes views
Hi and thanks for answering my prev. questions! Decided to ask this one: How can I convert fid data (ser file) to plain...
Posted: Magnethead 42 / Updated: Ulrich Haunz 210 Dec 04 '14 at 04:16


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