Here we look at some of the ways we try to maximize the power of NMR, in processes called locking and shimming.
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@AlphaNumeric1233 жыл бұрын
Absolutely fantastic teacher. He strikes the balance between making something accessible and--importantly--intuitive while also not watering things down too much or simplifying to the point of distortion. Really has the touch of a professor as opposed to a KZbin educator, which I mean as a compliment. Sub'ed and look forward to looking at more content!
@Brsawesome2 жыл бұрын
Hi Jeff, great explanation. Only 400 MHz, is 400 million Hertz (rather than 400 billion Hertz). Keep up the good work!
@seamus98982 жыл бұрын
awesome! best video I've found on lock & shim
@vanfidel6 жыл бұрын
Great explanations, thanks. Cracked me up how disgusted you looked about it looking like a UV spectrum.
@RohitPant042 жыл бұрын
Well done, Jeff. This was well presented!
@ramjayakumarv99342 жыл бұрын
Great explanation sir. Thank You.
@enzolong90852 жыл бұрын
Really cannot thank you enough for this explanation sir. Bless you
@matiafossatti90913 жыл бұрын
Great explanation, many thanks, prof. Jeff.
@jefforvis4613 жыл бұрын
Thank you, I appreciate it.
@Pepsimaximo12 жыл бұрын
Great explanation, thank you
@aag72746 жыл бұрын
very helpful thanks Jeff
@alcevallo46313 жыл бұрын
Thanks!
@nowar66974 жыл бұрын
Very well explained Jeff Orvis, i think it is 4bn instead of 400bn. lovely lecture
@JustinKoenigSilica3 жыл бұрын
400MHz is 400 million...
@Phosphoenol_pyruvate_CK2 жыл бұрын
Hi. Please I am wondering how long does it take to acquire a spectra from a sample on standard NMR machines?
@jefforvis4612 жыл бұрын
The answer is ... it depends. A standard proton spectrum of a reasonably concentrated sample can be acquired in under a minute. A highly dilute sample that requires over 100 scans can take five minutes. If one were to do a whole suite of experiments on a sample (proton, carbon, DEPT, COSY and so on) at least an hour of time is usually required. The longest experiments we typically see are carbon spectra of samples that have a low solubility in any common deuterated solvent. Those can be overnight runs of thousands of scans to get well defined peaks and a reasonable signal to noise ratio. I hope this helps.