| CDAC | Clinical Data Abstraction Center |
|---|---|
| N(H) | proton density |
| PIXE | particle-induced x-ray emission; proton-induced x-ray emission |
| PMF | platelet membrane fluidity; progressive massive fibrosis; proton motive force; pterygomaxillary foss... |
| pmf | proton motive force |
| 1H NMR | High resolution proton nuclear magnetic resonance |
|---|---|
| PIXE | Proton Induced X-ray Emission |
| PPI | Proton Pump Inhibitor |
| PD | Proton density |
| PMR | Proton magnetic resonance |
| abstraction | 1. The act of abstracting, separating, or withdrawing, or the state of being withdrawn; withdrawal. "A wrongful abstraction of wealth from certain members of the community." (J. S. Mill) 2. <psychology> The act process of leaving out of consideration one or more properties of a complex object so as to attend to others; analysis. Thus, when the mind considers the form of a tree by itself, or the colour of the leaves as separate from their size or figure, the act is called abstraction. So, also, when it considers whiteness, softness, virtue, existence, as separate from any particular objects. Abstraction is necessary to classification, by which things are arranged in genera and species. We separate in idea the qualities of certain objects, which are of the same kind, from others which are different, in each, and arrange the objects having the same properties in a class, or collected body. "Abstraction is no positive act: it is simply the negative of attention." (Sir W. Hamilton) 3. An idea or notion of an abstract, or theoretical nature; as, to fight for mere abstractions. 4. A separation from worldly objects; a recluse life; as, a hermit's abstraction. 5. Absence or absorption of mind; inattention to present objects. 6. The taking surreptitiously for one's own use part of the property of another; purloining. 7. <chemistry> A separation of volatile parts by the act of distillation. Origin: Cf. F. Abstraction. See Abstract. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| membrane-bound proton-translocating PPi synthase | <enzyme> From rhodospirillum rubrum; functions as an alternative coupling factor; n,n'-dicyclohexylcarbodiimide-sensitive; catalyses the phosphorylation of pi to ppi, the hydrolysis of ppi and the concomitant translocation of proton across the plasma membrane Registry number: EC 3.6.1.- Synonym: h(+)-ppi synthase (26 Jun 1999) |
| proton | <physics> An elementary atomic particle with a positive charge and a mass of about 1 amu. (09 Oct 1997) |
| proton acceptor | <chemistry> A base, an anionic substance that acceptsa proton during an acid-basereaction. (09 Oct 1997) |
| proton ATPase | <enzyme> An ion pump that actively transports hydrogen ions across lipid bilayers in exchange for ATP. Major groups are the F-type ATPases, that run in reverse to synthesise ATP in bacterial, mitochondrial and chloroplast membranes (ATP synthase) and the V-type ATPases found in intracellular vesicles with an acidic lumen and on certain epithelial cells (e.g. Kidney intercalated cells). Gastric H/K ATPase is a proton ATPase. (18 Nov 1997) |
| proton donor | <chemistry> An acid, a susbstance that donates protons in an acid-base reduction reaction. (10 Jan 1998) |
| proton-motive force | Energy that is generated by the transfer of protons or electrons across an energy-transducing membrane and that can be used for chemical, osmotic, or mechanical work. Proton-motive force can be generated by a variety of phenomena including the operation of an electron transport chain, illumination of a purple membrane, and the hydrolysis of ATP by a proton atpase. (12 Dec 1998) |
| proton pump | Integral membrane proteins that transport protons across a membrane against a concentration gradient. This transport is driven by hydrolysis of ATP by hydrogen-transporting ATP synthase. (12 Dec 1998) |
| proton pump inhibitor | <pharmacology> A group of anti-ulcer medications which work by binding to H+/K+ ATPase, an enzyme which is found on the secretory surface of parietal cells. It thereby inhibits the final transport of hydrogen ions (via exchange with potasium) into the gastric lumen. Examples of proton pump inhibitors include omeprazole and lansoprazole. (27 Sep 1997) |
Á¦Ç°¸í |
ÆÇ¸Å»ç |
º¸ÇèÄÚµå | ¼ººÐ/ÇÔ·® | ±¸ºÐ/º¸Çè±Þ¿© |
|---|
Á¦Ç°¸í |
ÆÇ¸Å»ç |
º¸ÇèÄÚµå | ¼ººÐ/ÇÔ·® | ±¸ºÐ/º¸Çè±Þ¿© |
|---|