Results 171 to 180 of about 24,139 (199)

Methemoglobin in hypoxic rats

Experientia, 1977
Methemoglobin levels have been found to vary with altitude and to shift the hemoglobin-oxygen dissociation curve. In this study, hematocrits and methemoglobin levels were monitored in rats exposed to hypoxia (420 torr absolute) for various intervals. Hematocrits gradually increased throughout the period of hypoxia, while methemoglobin levels rose by 12
C P, Olander, C E, Parr
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Guanidination of horse methemoglobin

Archives of Biochemistry and Biophysics, 1977
Abstract Reaction of horse methemoglobin with O -methylisourea at pH 10.2 results in 95% conversion of lysine residues to homoarginine. Analysis of the chymotryptic peptides showed that no single ϵ-amino group was unreactive. Guanidination decreases the dependence of the sedimentation coefficient on hydrogen ion concentration in the range of pH 8 to
J D, Sakura, J A, Rupley
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Methemoglobin, MEDLINE, and hyperlipemia

Critical Care Medicine, 1987
Un cas demontre la sensibilite de la determination spectrophotometrique de la methemoglobine a l'hyperlipemie chez un diabetique obese avec acidocetose. Le traitement a ete mis en route apres la decouverte d'un cas identique dans la litterature repertorie dans ...
K M, Murray, B, Meth
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Structure of isothiocyanate methemoglobin

Journal of Molecular Biology, 1981
Abstract The structure of the complex of the ambidentate ligand thiocyanate with horse methemoglobin was compared with that of acid methemoglobin and azide methemoglobin by X-ray difference Fourier techniques. Thiocyanate is co-ordinated to iron exclusively by its nitrogen atom, and thus forms the isothiocyanate complex.
Z R, Korszun, K, Moffat
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Structure of cyanide methemoglobin

Journal of Molecular Biology, 1976
Abstract X-ray difference Fourier analysis at 2.8 A resolution shows that the tertiary structures of horse cyanide methemoglobin and methemoglobin differ significantly. The conformations of the heme groups and their interactions with the globin are altered. Short contacts with globin side chains affect cyanide binding to the hemes, and the changes in
J F, Deatherage, R S, Loe, C M, Anderson, K, Moffat   +3 more
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Structure of imidazole methemoglobin

Journal of Molecular Biology, 1981
Abstract Crystals of horse methemoglobin shatter when soaked in crystallization buffer containing high concentrations of imidazole. By using less than saturating concentrations of imidazole, a stable imidazole derivative of crystalline methemoglobin was prepared and analyzed by X-ray difference Fourier techniques.
J A, Bell, Z R, Korszun, K, Moffat
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Catalysis of Methemoglobin Reduction

1984
Publisher Summary This chapter focuses on the catalysis of methemoglobin reduction. It discusses the results of studies in which photometry and magnetic circular dichroism (MCD) spectroscopy were used to follow the kinetics of methemoglobin reduction.
D E, Hultquist, L J, Sannes, D A, Juckett   +2 more
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Methemoglobin formation in analgesic nephropathy

Clinical Pharmacology & Therapeutics, 1974
Three groups were investigated to determine whether methemoglobin formation is greater than normal in chronic phenacetin analgesic abusers. Group I (8 patients) was comprised of nonabusers with normal renal function; Group II (12 patients), of nonabusers with impaired renal function; Group III (9 patients), of abusers who had consumed phenacetin in ...
M H, Gault, N T, Shahidi, V E, Barber
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Multiple forms of methemoglobin reductase

Archives of Biochemistry and Biophysics, 1969
Abstract Three pyridine nucleotide-dependent methemoglobin reductases (I, II, and III) have been purified from human erythrocytes by a procedure that involves batchwise treatment of the hemolyzate with DEAE-cellulose to remove most of the hemoglobin, fractionation with ammonium sulfate and acetone, and chromatography on DEAE-cellulose.
A, Kajita, G K, Kerwar, F M, Huennekens
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Binding of cyanide to methemoglobin

Experientia, 1968
E stata studiata l'interazione tra metemoglobina e cianuro. Il cianuro sembra legarsi ad un solo eme e l'equilibrio non sembra influenzato da interazioni eme-eme.
L, Galzigna, F, Gobbato, B, Saia
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