Results 171 to 180 of about 18,337 (208)

Structure of azide methemoglobin

Journal of Molecular Biology, 1979
Abstract We have compared the structures of horse azide methemoglobin and methemoglobin (MetHb) at 2.8 A resolution by X-ray difference Fourier analysis. Of four low-spin liganded Hb derivatives (nitric oxide Hb, carbon monoxide Hb, cyanide MetHb, and azide MetHb), azide MetHb is closest in structure to MetHb.
J F, Deatherage, S K, Obendorf, K, Moffat   +2 more
openaire   +2 more sources

Curcumin inhibits nitrite-induced methemoglobin formation [PDF]

FEBS Letters, 1992
Curcumin protects hemoglobin from nitrite-induced oxidation to methemoglobin. The protection is not observed when curcumin is added after the autocatalytic stage of the oxidation of hemoglobin by nitrite.
M K Unnikrishnan
exaly   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

Deficiencies and Improvement of Methemoglobin Assay

Journal of Analytical Toxicology, 1984
A day-to-day variability in results was encountered when using the Dubowski method for the routine clinical determination of methemoglobin in blood. Therefore, studies were performed to determine the source(s) of variability in the method as described by Dubowski.
J C, Anders, H, Chung
openaire   +2 more sources

Methemoglobin Reductase Deficiency in a Dog

Journal of the American Veterinary Medical Association, 1974
SUMMARY In a case of canine methemoglobinemia the only significant clinical findings were brownish mucous membranes and dark, brownish blood. Chemical analysis indicated a methemoglobin concentration that was approximately 30% of the total hemoglobin.
J W, Harvey, G V, Ling, J J, Kaneko
openaire   +2 more sources

Methemoglobin reductase deficiency in a cat

Journal of the American Veterinary Medical Association, 1994
During ovariohysterectomy of a 6-month-old domestic shorthair cat, extravasated blood appeared brown. Methemoglobinemia was considered likely on the basis of discoloration of oxygenated blood. The absence of clinical signs of toxicosis, inability to identify a source of oxidant that could cause methemoglobinemia, and persistence of cyanotic-appearing ...
J W, Harvey, M, Dahl, M E, High
openaire   +2 more sources

A New Method for the Reduction of Methemoglobin and Methemoglobin Derivatives

1991
Abstract : The chemical reduction of methemoglobin (metHb) with dithionite and other reducing agents has proven unsatisfactory due to undesirable byproducts. We have now developed a method to reduce methemoglobin on a preparative scale, in which metHb is reduced using photoactivated flavin mononucleotide (FMN). The reduction is performed in the absence
openaire   +1 more source

Benzocaine and Methemoglobin

Anesthesiology, 1991
J W, Severinghaus, F D, Xu, M J, Spellman   +2 more
  +5 more sources

The Role of Methemoglobin and Carboxyhemoglobin in COVID-19: A Review

Journal of Clinical Medicine, 2021
Valentina Quaresima, Felix Scholkmann
exaly