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Methemoglobinemia, or methaemoglobinaemia, is a condition of elevated methemoglobin in the blood. [2] Symptoms may include headache, dizziness, shortness of breath, nausea, poor muscle coordination, and blue-colored skin (cyanosis). [2] Complications may include seizures and heart arrhythmias. [3][4]
Methemoglobin. The structure of cytochrome b5 reductase, the enzyme that converts methemoglobin to hemoglobin. [1] Methemoglobin (British: methaemoglobin, shortened MetHb) (pronounced "met-hemoglobin") is a hemoglobin in the form of metalloprotein, in which the iron in the heme group is in the Fe 3+ (ferric) state, not the Fe 2+ (ferrous) of ...
The methylene blue sulfide test is a convenient method often used in soil microbiology to quickly detect in water the metabolic activity of sulfate reducing bacteria (SRB). It must be noted that in this colorimetric test, methylene blue is a product formed by the reaction and not a reagent added to the system.
Cytochrome-b5 reductase is a NADH -dependent enzyme that converts ferricytochrome from a Fe3+ form to a Fe2+ form. [1] It contains FAD and catalyzes the reaction: NADH + H + + 2 ferricytochrome b5 = NAD + + 2 ferrocytochrome b5. In its b5-reducing capacity, this enzyme is involved in desaturation and elongation of fatty acids, cholesterol ...
One to two people per million worldwide. [1] Drug-induced autoimmune hemolytic anemia also known as Drug-induced immune hemolytic anemia (DIIHA) is a rare cause of hemolytic anemia. It is difficult to differentiate from other forms of anemia which can lead to delays in diagnosis and treatment. Many different types of antibiotics can cause DIIHA ...
Erythropoiesis-stimulating agents (ESA) are medications which stimulate the bone marrow to make red blood cells. [1] They are used to treat anemia due to end stage kidney disease, chemotherapy, major surgery, or certain treatments in HIV/AIDS. [1][2] In these situations they decrease the need for blood transfusions. [2]
Megaloblastic anemia is a type of macrocytic anemia. An anemia is a red blood cell defect that can lead to an undersupply of oxygen. [1] Megaloblastic anemia results from inhibition of DNA synthesis during red blood cell production. [2] When DNA synthesis is impaired, the cell cycle cannot progress from the G2 growth stage to the mitosis (M) stage.
Hemoglobin M disease is a rare form of hemoglobinopathy, characterized by the presence of hemoglobin M (HbM) and elevated methemoglobin (metHb) level in blood. [1] HbM is an altered form of hemoglobin (Hb) due to point mutation occurring in globin-encoding genes, mostly involving tyrosine substitution for proximal (F8) or distal (E7) histidine residues. [2]