Category: M

Stain employed in histology and bacteriology.  

An oxidation product of purine. Includes caffeine, theophylline, and theobromine.  

An organic mercury compound produced by marine and soil bacteria. The level of methyl mercury increases in fish as it increases in polluted water. It is toxic to humans, especially children.  

In organic chemistry, the radical CH3 , seen, for instance, in the formula for methyl alcohol, CH3OH.  

An autosomal recessive disease, which is associated with mental retardation, diarrhea, convulsions, phenylketonuria, and a characteristic odor of the urine. The odor is due to the absorption from the intestinal tract of fermentation products of methionine.  

A radiopaque compound used in x-ray examination of the urinary tract.  

Presence of methemoglobin in the urine. The detection of methemoglobin in the urine.    

The fraction of the hemoglobin in the blood in which ferrous iron has been oxidized to ferric iron.  

The clinical condition in which more than 1% of hemoglobin in blood has been oxidized to the ferric (Fe3+) form. The most common sign is cyanosis, because the oxidized hemoglobin does not transport oxygen. Very high concentrations of methemoglobin in the blood (i.e., greater than 30%) may produce dizziness, drowsiness, headache, or more severe neurological…

An enzyme found in significant amounts in erythrocytes that catalyzes the reduction of methemoglobin in conjunction with the coenzyme nicotine adenine dinucleotide phosphate and other enzymes.