X
Xanthine
Posted on July 24, 2011 |
A purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is an intermediate in the degradation of adenosine monophosphate to uric acid, being formed by oxidation of hypoxanthine. The methylated xanthine compounds caffeine, theobromine, and theophylline and their derivatives are used in medicine for their bronchodilator effects. (Dorland, 28th ed)
Xanthinol Niacinate
Posted on July 24, 2011 |
A vasodilator used in peripheral vascular disorders and insufficiency. It may cause gastric discomfort and hypotension.
Xanthines
Posted on July 24, 2011 |
Purine bases found in body tissues and fluids and in some plants.
Xanthine Oxidase
Posted on July 24, 2011 |
An iron-molybdenum flavoprotein containing FLAVIN-ADENINE DINUCLEOTIDE that oxidizes hypoxanthine, some other purines and pterins, and aldehydes. Deficiency of the enzyme, an autosomal recessive trait, causes xanthinuria. EC 1.1.3.22.
X Radiation
Posted on July 24, 2011 |
Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release energy – in the same energy range as gamma rays (0.010-10 Mev), but of non-nuclear origin, of shorter wavelength than ultraviolet; soft x-rays or Grenz rays are less penetrating and longer in wavelength than hard x-rays.
Xanthogranulomatous Pyelonephritis
Posted on July 24, 2011 |
An inflammatory condition of the kidney most commonly resulting in a grossly enlarged and nonfunctioning kidney associated with stones and infection.
Xanthogranulomatous Pyelonephritides
Posted on July 24, 2011 |
An inflammatory condition of the kidney most commonly resulting in a grossly enlarged and nonfunctioning kidney associated with stones and infection.
Xanthinol Nicotinate
Posted on July 24, 2011 |
A vasodilator used in peripheral vascular disorders and insufficiency. It may cause gastric discomfort and hypotension.
Xenodiagnosis
Posted on July 24, 2011 |
A method for diagnosing a disease in one organism by inoculating the putative causative organism in a second animal of a different species. It has been used for the detection of parasites (Trypanosoma cruzi and Trichinella spiralis) when peripheral blood smears are negative. (Segen, Current Med Talk, 1995)
Xanthine Alkaloids
Posted on July 24, 2011 |
Alkaloids, which contain xanthine as their nitrogenous base.