FAD - definizione. Che cos'è FAD
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Cosa (chi) è FAD - definizione

REDOX COFACTOR, MORE SPECIFICALLY A PROSTHETIC GROUP, INVOLVED IN SEVERAL IMPORTANT REACTIONS IN METABOLISM; CAN EXIST IN THREE (OR FOUR: FLAVIN-N(5)-OXIDE) DIFFERENT REDOX STATES; CONVERTED BETWEEN THESE STATES BY ACCEPTING OR DONATING ELECTRONS
FADH2; FADH; Flavin-adenine dinucleotide; FADH₂; C27H33N9O15P2; FAD
  • Approximate absorption spectrum for FAD
  • Mechanism 4. The loss of hydride to electron deficient R group
  • Mechanism 1. Hydride transfer occurs by addition of H<sup>+</sup> and 2 e<sup>−</sup>
  • Mechanism 2. Hydride transfer by abstraction of hydride from NADH
  • Mechanism 5. Use of nucleophilic addition to break R<sub>1</sub>-R<sub>2</sub> bond
  • Mechanism 3. Radical formation by electron abstraction
  • Mechanism 6. Carbon radical reacts with O<sub>2</sub> and acid to form H<sub>2</sub>O<sub>2</sub>

fad         
THING OR BEHAVIOR THAT ACHIEVES INTENSE SHORT-LIVED POPULARITY AND THEN FADES AWAY
Fads; Trendy; Trends; List of Fads and Trends; Fad sensation; List of fads and trends; Fads and Trends; Fads and trends; Faddish; Trended; Trends Magazine; Faddist; Trends (journal); Trending; List of fads; Trends (magazine); Trend; Meme trends
n.
1) the latest, newest fad
2) a passing fad
fad         
THING OR BEHAVIOR THAT ACHIEVES INTENSE SHORT-LIVED POPULARITY AND THEN FADES AWAY
Fads; Trendy; Trends; List of Fads and Trends; Fad sensation; List of fads and trends; Fads and Trends; Fads and trends; Faddish; Trended; Trends Magazine; Faddist; Trends (journal); Trending; List of fads; Trends (magazine); Trend; Meme trends
¦ noun
1. a craze.
2. an arbitrary like or dislike.
Derivatives
faddish adjective
faddishly adverb
faddishness noun
faddism noun
faddist noun
Origin
C19 (orig. dialect): prob. the second element of fidfad, contr. of fiddle-faddle.
fad         
THING OR BEHAVIOR THAT ACHIEVES INTENSE SHORT-LIVED POPULARITY AND THEN FADES AWAY
Fads; Trendy; Trends; List of Fads and Trends; Fad sensation; List of fads and trends; Fads and Trends; Fads and trends; Faddish; Trended; Trends Magazine; Faddist; Trends (journal); Trending; List of fads; Trends (magazine); Trend; Meme trends
(fads)
You use fad to refer to an activity or topic of interest that is very popular for a short time, but which people become bored with very quickly.
Hamnett does not believe environmental concern is a passing fad.
= craze
N-COUNT

Wikipedia

Flavin adenine dinucleotide

In biochemistry, flavin adenine dinucleotide (FAD) is a redox-active coenzyme associated with various proteins, which is involved with several enzymatic reactions in metabolism. A flavoprotein is a protein that contains a flavin group, which may be in the form of FAD or flavin mononucleotide (FMN). Many flavoproteins are known: components of the succinate dehydrogenase complex, α-ketoglutarate dehydrogenase, and a component of the pyruvate dehydrogenase complex.

FAD can exist in four redox states, which are the flavin-N(5)-oxide, quinone, semiquinone, and hydroquinone. FAD is converted between these states by accepting or donating electrons. FAD, in its fully oxidized form, or quinone form, accepts two electrons and two protons to become FADH2 (hydroquinone form). The semiquinone (FADH·) can be formed by either reduction of FAD or oxidation of FADH2 by accepting or donating one electron and one proton, respectively. Some proteins, however, generate and maintain a superoxidized form of the flavin cofactor, the flavin-N(5)-oxide.

Esempi dal corpus di testo per FAD
1. His cheapest work, Fad Admired, Fad Advanced, is on the market for 1,000.
2. Why has Synthetic Phonics become the latest educational fad?
3. I know baseball analogies are the fad these days.
4. Competition arises, prices fall and the fad passes.
5. Isn‘t poker, like in line skating, just a fad, too?