The major constituent of natural gas is methane however, other gaseous hydrocarbons are also present. One way to identify other components is to dissolve some natural gas in a solvent and examine the 1H NMR spectrum. The spectrum in the figure below was acquired on a sample prepared by bubbling natural gas through benzene-d6 for several minutes. The spectrum clearly shows the presence of methane, ethane, propane and water. The spectrum also indicated other impurities at much lower levels (not shown in the figure).
[NMR paper] The X-ray structure of a recombinant major urinary protein at 1.75 A resolution. A co
The X-ray structure of a recombinant major urinary protein at 1.75 A resolution. A comparative study of X-ray and NMR-derived structures.
Related Articles The X-ray structure of a recombinant major urinary protein at 1.75 A resolution. A comparative study of X-ray and NMR-derived structures.
Acta Crystallogr D Biol Crystallogr. 2001 Dec;57(Pt 12):1863-9
Authors: Kuser PR, Franzoni L, Ferrari E, Spisni A, Polikarpov I
Major urinary proteins belong to the lipocalin family and are present in the urine of rodents as an ensemble of isoforms with...
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Configurational assignment of D- and L-isovalines in intact, natural, and synthetic p
Configurational assignment of D- and L-isovalines in intact, natural, and synthetic peptides by 2D-NMR spectroscopy.
Related Articles Configurational assignment of D- and L-isovalines in intact, natural, and synthetic peptides by 2D-NMR spectroscopy.
Chem Biodivers. 2010 Jun;7(6):1612-24
Authors: De Zotti M, Schievano E, Mammi S, Kaptein B, Broxterman QB, Singh SB, Brückner H, Toniolo C
We investigated, by means of 2D-NMR, the naturally occurring and chemically synthesized 16-mer integramides A and B, which belong to a group of bioactive, fungal...
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[NMR paper] 1H-NMR-derived secondary structure and overall fold of a natural anatoxin from the sc
1H-NMR-derived secondary structure and overall fold of a natural anatoxin from the scorpion Androctonus australis hector.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www3.interscience.wiley.com-aboutus-images-wiley_interscience_pubmed_logo_FREE_120x27.gif Related Articles 1H-NMR-derived secondary structure and overall fold of a natural anatoxin from the scorpion Androctonus australis hector.
Eur J Biochem. 1997 Aug 1;247(3):1118-26
Authors: Blanc E, Hassani O, Meunier S, Mansuelle P, Sampieri F, Rochat H, Darbon H
The venom of the...
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[NMR paper] 13C NMR of Nephila clavipes major ampullate silk gland.
13C NMR of Nephila clavipes major ampullate silk gland.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-cellhub.gif http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www.pubmedcentral.nih.gov-corehtml-pmc-pmcgifs-pubmed-pmc.gif Related Articles 13C NMR of Nephila clavipes major ampullate silk gland.
Biophys J. 1996 Dec;71(6):3442-7
Authors: Hijirida DH, Do KG, Michal C, Wong S, Zax D, Jelinski LW
The major ampullate glands of the spider Nephila clavipes contain approximately 0.2 microliter each...
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[NMR paper] 1H- and natural abundance 15N-NMR studies of a derivative of a rabies glycoprotein fr
1H- and natural abundance 15N-NMR studies of a derivative of a rabies glycoprotein fragment.
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Biopolymers. 1991 May;31(6):713-23
Authors: Molinari H, Consonni R, Pegna M, Zetta L, Neri P, Niccolai N, Bonci A, Lozzi L, Rustici M, Scarselli M
Using a combination of one- and two-dimensional methods, 1H- and 15N-nmr spectroscopy has been employed to perform the complete assignment and the structural determination of the immunogenic...
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[NMR software blog] Natural Products
Natural Products
http://1.bp.blogspot.com/_ROkYShLRKqA/SteNWieFqCI/AAAAAAAAARk/qKuAY5zIiGo/s400/antiphase.png
A reader asked me: "What is the shape of a 2-D peak?" and my answer was: "Exponential! (in time domain)". This is all you need to know, I think. The picture should help, as always. If you are reading this blog, it means that you have something like a computer. Even the iPhone is a computer (you can run programs on it) and can display my blog. I suspect, however, that you have a better computer, like I do.
You can use your computer to run simulations and more: you can ask it to...
The Major Constituents of Natural Gas
The spectrum also indicated other impurities at much lower levels (not shown in the figure).
Linear Mode
