PDH 268
PDH may refer to: * Angiotensin-converting enzyme, an enzyme * Plesiochronous digital hierarchy, in telecommunications networks * Pound–Drever–Hall technique for stabilizing a laser's output * Pyranose dehydrogenase (acceptor), an enzyme * Pyruvate dehydrogenase Pyruvate dehydrogenase is an enzyme that catalyzes the reaction of pyruvate and a lipoamide to give the acetylated dihydrolipoamide and carbon dioxide. The conversion requires the coenzyme thiamine pyrophosphate. Pyruvate dehydrogenase is ...

Angiotensin-converting Enzyme
Angiotensin-converting enzyme (), or ACE, is a central component of the renin–angiotensin system (RAS), which controls blood pressure by regulating the volume of fluids in the body. It converts the hormone angiotensin I to the active vasoconstriction, vasoconstrictor angiotensin II. Therefore, ACE indirectly increases blood pressure by causing blood vessels to constrict. ACE inhibitors are widely used as pharmaceutical drugs for treatment of cardiovascular diseases. Other lesser known functions of ACE are degradation of bradykinin, substance P and amyloid beta, amyloid beta-protein. Nomenclature ACE is also known by the following names: * dipeptidyl carboxypeptidase I * peptidase P * dipeptide hydrolase * peptidyl dipeptidase * angiotensin converting enzyme * kininase II * angiotensin I-converting enzyme * carboxycathepsin * dipeptidyl carboxypeptidase * "hypertensin converting enzyme" peptidyl dipeptidase I * peptidyl-dipeptide hydrolase * peptidyldipeptide hydrolase * en ...
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Pound–Drever–Hall Technique
The Pound–Drever–Hall (PDH) technique is a widely used and powerful approach for stabilizing the frequency of light emitted by a laser by means of feedback, locking to a stable cavity. The PDH technique has a broad range of applications including LIGO, interferometric gravitational wave detectors, saturated absorption spectroscopy, atomic physics, and atomic clock, time measurement standards, many of which also use related techniques such as frequency modulation spectroscopy. Named after R. V. Pound, Ronald Drever, and John L. Hall, the PDH technique was described in 1983 by Drever, Hall and others working at the University of Glasgow and the U. S. National Bureau of Standards. This optical technique has many similarities to an older frequency-modulation technique developed by Pound for microwave cavities. (Pedagogical review article describing the technique.) Since a wide range of conditions contribute to determine the laser linewidth, linewidth produced by a laser, the PDH tec ...
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Pyranose Dehydrogenase (acceptor)
Pyranose dehydrogenase (acceptor) (, ''pyranose dehydrogenase'', ''pyranose-quinone oxidoreductase'', ''quinone-dependent pyranose dehydrogenase'', ''PDH'') is an enzyme with systematic name ''pyranose:acceptor oxidoreductase''. This enzyme catalyses the following chemical reaction : (1) a pyranose + acceptor \rightleftharpoons a pyranos-2-ulose (or a pyranos-3-ulose or a pyranos-2,3-diulose) + reduced acceptor : (2) a pyranoside + acceptor \rightleftharpoons a pyranosid-3-ulose (or a pyranosid-3,4-diulose) + reduced acceptor This enzyme requires FAD. A number of aldoses and ketoses in pyranose form, as well as glycosides, gluco-oligosaccharides, sucrose and lactose Lactose is a disaccharide composed of galactose and glucose and has the molecular formula C12H22O11. Lactose makes up around 2–8% of milk (by mass). The name comes from (Genitive case, gen. ), the Latin word for milk, plus the suffix ''-o ... can act as a donor. References External links * {{Port ...
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