Definition of acceptor in US English:



  • 1A person or thing that accepts or receives something.

    ‘he hoped to make the most of being one of the first acceptors of bitcoin in the Sydney marketplace’
    ‘don't all award accepters memorize what to say beforehand?’
    • ‘As against the discounters of the customer's bills, the bank, which figures as an acceptor, assumes primary liability.’
    • ‘The malfunction or "glitch" allows cheaters to play for free credits in the slot machine by jamming the machine's bill acceptor.’
    • ‘At maturity the Discount House will collect the face value of the bill from the acceptor.’
    • ‘Women sought support of a more emotional kind and turned to the 'unconditional accepters' and the 'listeners'.’
    • ‘The Melbourne Cup has attracted a total of 168 first acceptors.’
    • ‘There are only around 100 000 card accepters in South Africa serving a population of around 60 million.’
    • ‘Each child was imagined as an active participant in establishing those boundaries, not as a passive acceptor of pre-established group decisions.’
    • ‘Recommendations of this kind have traditionally been opposed by manufacturers and risk acceptors.’
    • ‘According to Rothstein's classification of hosts based on ejection frequencies, robins would be considered accepters of both white and blue cuckoo eggs.’
    • ‘An Englishman took the bill, and after a careful examination said he neither knew the drawer, the accepter, nor the backer.’
  • 2Chemistry
    An atom or molecule which is able to bind to or accept an electron or other species.

    ‘some microorganisms can use oxygen as an electron acceptor’
    • ‘The glow of the firefly, which is due to the oxidation of the molecule luciferin, with the enzyme luciferase acting as a catalyst in the oxidation process and oxygen acting as the electron acceptor, is an example of bioluminescence.’
    • ‘Coenzyme Q10 is an electron acceptor and antioxidant that is a key component of mitochondrial electron transfer.’
    • ‘They compartmentalize terminal steps of anaerobic energy metabolism but, unlike mitochondria, hydrogenosomes cannot use oxygen as an electron acceptor; they reduce protons to molecular hydrogen.’
    • ‘Fret results from weak nonradiative coupling of two chromophores (acting as a donor and an acceptor, respectively) bound to the macromolecules.’
    • ‘Peroxidases are haem-containing enzymes which mediate oxidation of a variety of molecules using hydrogen peroxide as an electron acceptor.’
    • ‘The first step of the Calvin cycle is the addition of carbon dioxide to an acceptor molecule.’
    • ‘The accepted view of plant adaptation to low oxygen concentrations holds that below certain oxygen limits, plant cells cannot sustain respiration due to lack of an electron acceptor for the terminal oxidases.’
    • ‘Xanthine oxidase uses molecular oxygen as an electron acceptor, resulting in the formation of superoxide radicals.’
    • ‘Nadp is much preferred to oxygen as an electron acceptor in intact chloroplasts.’
    • ‘The iron - sulphur cluster associated with the Rieske centre of proteins normally functions in electron transfer reactions as it can act as an electron acceptor and donor.’
    • ‘Some bacteria are able to switch from enzymes using oxygen as a terminal electron acceptor to enzymes using alternative electron acceptors.’
    • ‘We next wanted to demonstrate the utility of sRET in conditions where the acceptor and donor molecules were not covalently linked.’
    • ‘They propose that the relatively low redox potential of hypericin permits it to compete as an electron acceptor, which consequently potentiates its biological activity in the dark, permitting it to interfere with the growth of tumors.’
    • ‘Cellular respiration is the process by which cells obtain energy from food through chemical reaction with an inorganic electron acceptor, usually oxygen.’
    • ‘The conventionally utilized enzyme for glucose measurement, glucose oxidase, inherently utilizes oxygen as its electron acceptor during the oxidation of glucose.’
    • ‘Second, carbon tetrachloride is known to act as an electron acceptor.’
    • ‘Paraquat acts as an alternative electron acceptor from PSI generating superoxide.’
    • ‘Nitrate ion has been shown to act as a terminal electron acceptor in the denitrification process in flooded soils and has been suggested to play a similar role in plants.’
    • ‘Moreover, we have recorded similar photoeffects also in the absence of an electron acceptor in our experiments.’
    • ‘This enzyme uses inorganic oxygen as an electron acceptor and H 2 O 2 is formed that has to be detoxified by a catalase.’
    1. 2.1Physics An acceptor atom forming a positive hole in a semiconductor.
      • ‘Normally ET from a ground-state donor to a ground-state acceptor is energetically not favorable.’
      • ‘First, the emission spectrum of the donor molecule must overlap with the absorbance spectrum of the acceptor.’
      • ‘This indicates that the bound azide is required to detect the 410-nm signal and suggests that azide plays the role of the proton acceptor.’
      • ‘In this configuration, an excited donor has a higher probability to transfer its energy to a neighboring acceptor than to emit energy as fluorescence.’
      • ‘Identical results were obtained by Willis and Szabo using tyrosine in the presence of acetate and other proton acceptors.’
      • ‘The increased energy of the modified sequences reflects the repositioning of proton donor and acceptor atoms between drug and DNA.’
      • ‘The number of photons needed approaches infinity when the acceptor is completely depolarized.’
      • ‘Every other electron that leaves the n region will likewise leave behind another positively charged acceptor ion.’
      • ‘The results support the idea that the strength of hydrogen bonding reflects the magnitude of the charges on the associated proton donor and acceptor atoms.’
      • ‘The donor must have fluorescent properties, whereas the acceptor does not necessarily fluoresce.’
      • ‘In the MCS, each excited donor can then either transfer its energy to an acceptor or emit fluorescence, according to the rules listed above.’
      • ‘The holes likewise leave negative acceptor ions.’
      • ‘In most organic donor-acceptor systems, ET from a ground-state donor to a ground-state acceptor is usually not favorable because of energy reasons.’
      • ‘Additionally, it is now known that the effective quantum yield of MLCs can be increased by RET to high quantum yield acceptors.’
      • ‘The first is the intrinsic polarization of the isolated acceptor emission, which may be a function of its environment and the particular excitation and emission wavelengths used.’
      • ‘Fluorescence is detected using an emission path image splitter, outfitted with polarizers, that detects the donor fluorescence as well as two polarizations of the acceptor fluorescence.’