Donor

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donor

1. Med any person who voluntarily gives blood, skin, a kidney etc., for use in the treatment of another person
2. Law
a. a person who makes a gift of property
b. a person who bestows upon another a power of appointment over property
3. Chemistry the atom supplying both electrons in a coordinate bond
4. Physics an impurity, such as antimony or arsenic, that is added to a semiconductor material in order to increase its n-type conductivity by contributing free electrons
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Donor

 

in medieval and Renaissance art and sometimes in the art of later periods, a representation of the builder of the church holding a model of the structure in his hands or of the patron who had ordered the painting, more rarely, sculpture or work of decorative applied art. The donor usually stands before Christ and the Virgin Mary or the saints.


Donor

 

a person giving his own blood for transfusion, or tissue (for example, skin) or an organ (for example, a kidney) for transplantation in a patient (the recipient). At the present stage of science the most widely found form of donation is blood donation. In the USSR donation is a voluntary act. Any healthy (according to a special medical examination), physically mature person 18 years of age and older can become a donor. The giving of blood is harmless for the donor. The health of the donor is protected, and in the USSR the donors have benefits. They are permitted to leave work with pay in order to give blood, and after giving blood they receive a day off with pay from the institution where they are employed. Donors are the first to receive permits to stay at sanatoriums and rest homes. The Executive Committee of the Red Cross and Red Crescent has established an award for donors, the badge Honorary Donor of the USSR.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

donor

[′dō·nər]
(solid-state physics)
An impurity that is added to a pure semiconductor material to increase the number of free electrons. Also known as donor impurity; electron donor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Experimental investigation of in situ upgrading of heavy oil by using a hydrogen donor and catalyst during steam injection, PhD Thesis, Texas A & M University.
Extra heavy crude oil downhole upgrading process using hydrogen donor under conditions, SPE 69692, 2001 SPE International Symposium on Thermal Operations and Heavy Oil, Poriamar, Venezuela, March 12-14.
Upgrading of extra-heavy crude using hydrogen donor under steam injection conditions.
The temperature of the reaction appeared to be an important parameter in the CTH of vegetable oil using Pd/C as the catalyst when limonene was the hydrogen donor. In the temperature where the reaction proceeded, disproportionation of the limonene occurred along with hydride production and reduction of the double bonds.
Some evidence on oleate isomerization was obtained, but the influence of the catalyst and hydrogen donor solvent on isomerization will be a subject for future work.
This excited state triplet can be quenched by monomer (desirable), oxygen (inhibition, not desirable), decay due to non-radioactive decay, accepting hydrogen from the hydrogen donors like amines, ethers, alcohols or thiols.
Among the hydrogen donors, tertiary amines, amino benzoates are the choice for ink makers.
Pharmacophore model on histone deacetylase (HDAC) with known hydroxamic acids and cyclic peptides shows four pharmacophore features: one hydrogen acceptor and one hydrophobic and two aromatic rings [17] and in the study with known hydroxamic acids, benzamides, and biphenyl derivatives on HDAC [40] three pharmacophore features were shown: hydrogen acceptors, hydrogen donors, and hydrophobic aromatic ring.