Results 241 to 250 of about 1,079,697 (312)
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1H-NMR characterization of cucumber peroxidases
Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1991Two peroxidase isoenzymes from Cucumber seedlings, one acidic (pI = 4) and one basic (pI = 9), were characterized by 1H-NMR spectroscopy. The NMR spectra were obtained in the native (ferric high-spin) and cyanide ligated (ferric low-spin) forms of both isoenzymes. The NMR spectral comparison of paramagnetically shifted resonances with those of the well
L B, Dugad, H M, Goff, F B, Abeles
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Computational 1H NMR: Part 1. Theoretical background
Magnetic resonance in chemistry : MRC, 2019This is the first one of the three closely interrelated reviews to be published in Magnetic Resonance in Chemistry dealing with accordingly theoretical background, chemical applications, and biochemical studies of and by means of computational 1H NMR ...
L. Krivdin
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The 1H NMR spectrum of benzanthrone
Spectrochimica Acta Part A: Molecular Spectroscopy, 1981Abstract The chemical shifts of all the eleven protons in the 1 H NMR spectrum of benzanthrone have been assigned unambiguously.
A.V.Rama Rao, A. Vaidyanathan
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2009
Electronegative substituents cause a decrease in |J|gem while a double or triple bond next to the CH2 group causes an increase.
Ernö Pretsch +2 more
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Electronegative substituents cause a decrease in |J|gem while a double or triple bond next to the CH2 group causes an increase.
Ernö Pretsch +2 more
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Rubber Chemistry and Technology, 1980
Abstract 1H NMR spectra of polyisoprene were assigned using polymers of isoprene-1,1,4,4-d4, isoprene-1,1,5,5,5-d5, and isoprene-4,4-d2 polymerized with various catalysts. The methylene-proton signal at 2.1 ppm in cis-1,4- and trans-1,4-polyisoprenes was divided into H4- and H1-proton signals; H4 resonated at 2.21 ppm in both cis-1,4
H. Sato, Y. Tanaka
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Abstract 1H NMR spectra of polyisoprene were assigned using polymers of isoprene-1,1,4,4-d4, isoprene-1,1,5,5,5-d5, and isoprene-4,4-d2 polymerized with various catalysts. The methylene-proton signal at 2.1 ppm in cis-1,4- and trans-1,4-polyisoprenes was divided into H4- and H1-proton signals; H4 resonated at 2.21 ppm in both cis-1,4
H. Sato, Y. Tanaka
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1H-NMR assay of phosphatidylcholine and phosphatidylethanolamine in AL721
Journal of Pharmaceutical and Biomedical Analysis, 1990A 1H-NMR based method has been developed for the assay of phosphatidylcholine (PC), and phosphatidylethanolamine (PE) in AL721. The assay was based on the comparison of NMR signal intensities of the choline and the ethanolamine moiety of PC and PE, respectively, to the signal of imidazole, the internal standard. The assay was reliable and more accurate
A P, Cheung, L L, Olson
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A 1H NMR study of cobalt(II) arsanilazocarboxypeptidase A
Journal of Inorganic Biochemistry, 1989Cobalt(II) arsanilazotyrosine-248 carboxypeptidase A has been characterized through 1H NMR spectroscopy. The ability of the azoenzyme to form binary and ternary complexes with L- and D-phenylalanine and azide has been investigated. Comparison with the 1H NMR results obtained on unmodified cobalt(II) carboxypeptidase provides direct information on the ...
BERTINI, IVANO +3 more
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Estimation of liposome integrity by 1H-NMR spectroscopy
Analytical Biochemistry, 1985A fast and simple method of 1H-NMR spectroscopic control of liposome membrane integrity is suggested. The method is based on the redistribution of intensities between two singlet 1H-NMR signals--from intraliposomal marker compound (nitrilotriacetic acid sodium salt, 1H-NMR signal at 4 p.p.m.) and from its complex with Eu3+ added to the external medium (
N N, Ivanov +4 more
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1990
Proton nuclear magnetic resonance (1H-NMR) provides a sensitive means to detect biochemical changes in living systems (Ackerman et al 1981, Gadian 1982). The usefulness of 1H-NMR for in vivo studies has been shown in hypoxia (Behar et al 1983), hypoglycemia (Behar et al 1985), seizures (Petroff et al 1986), and ischemia (Gadian et al 1986, Crockard et ...
G. A. Rosenberg +4 more
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Proton nuclear magnetic resonance (1H-NMR) provides a sensitive means to detect biochemical changes in living systems (Ackerman et al 1981, Gadian 1982). The usefulness of 1H-NMR for in vivo studies has been shown in hypoxia (Behar et al 1983), hypoglycemia (Behar et al 1985), seizures (Petroff et al 1986), and ischemia (Gadian et al 1986, Crockard et ...
G. A. Rosenberg +4 more
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Reproducibility of 1H-NMR integrals: a collaborative study
Journal of Pharmaceutical and Biomedical Analysis, 1998The quantitative use of NMR spectroscopy was investigated by a reproducibility study of 1H-NMR integrals involving five laboratories. A significant laboratory effect was found confirming the difficulty to obtain very precise data by integration of complex signals.
M, Bauer +5 more
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