hydrogen donor

(redirected from Active hydrogen)
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hy·dro·gen do·nor

a metabolite from which hydrogen is removed (by a dehydrogenase system) and transferred by a hydrogen carrier to another metabolite, which is thus reduced.

hydrogen donor

a compound that gives up hydrogen (usually H+, a proton) to another compound.

hy·dro·gen do·nor

(hī'drō-jen dō'nŏr)
A metabolite from which hydrogen is removed (by a dehydrogenase system) and transferred by a hydrogen carrier to another metabolite, which is thus reduced.

hydrogen donor

In oxidation-reduction reactions, a substance that gives up hydrogen atoms to another substance, the acceptor.
See: hydrogen acceptor
See also: donor
References in periodicals archive ?
Contract notice: Delivery of an active hydrogen maser.
A rubber composition comprising: (A) a conjugated diene rubber which is obtained by polymerizing a conjugated diene compound or polymerizing a conjugated diene compound and an aromatic vinyl compound and has a group having an active hydrogen and a group capable of chemically binding to a silica, (B) a silica, (C) a silane coupling agent (1) capable of reacting with a carbon-carbon double bond of the conjugated diene in the conjugated diene rubber, and (D) a silane coupling agent (II) capable of reacting with the group having an active hydrogen; a method for producing a rubber composition, which comprises mixing the above-mentioned composition; and a tire which is obtained by crosslinking and molding the rubber composition obtained by the method for production.
2] group and the active hydrogen atoms of these functional groups may lake part in the polymerization of BMI with BTA via the Michael addition reaction mechanism.
Valspar Sourcing has been granted a patent for a method of making a coating composition comprised of reacting the following components to form a coating composition: a first component A, comprised of: approximately 20% weight to 90% weight, based on the total weight of the composition, of an unsaturated polyester resin, wherein the unsaturated polyester is comprised of allyl ether functionality, 1% weight to 50% weight: an alkoxy (meth)acrylic functional monomer, wherein the functional monomer is selected from di and tri(meth)acrylic functional compounds with 8 to 16 ethoxy or propoxy groups along a backbone and a thermoplastic compound containing active hydrogen groups, wherein the thermoplastic compound is selected from cellulose resins and cellulose derivatized resins; and 0.
The hydrogen donor additives releases free active hydrogen that react with the active chain free radicals produced during pyrolysis of the heavy oil, thereby inhibiting the regress of upgraded oil viscosity (Curtis and Cassell, 1988; Ovalles, et al.
Nearly all the major vehicle manufacturers have active hydrogen research and development programmes.
Isocyanate compounds are usually highly reactive toward molecules containing an active hydrogen entity.
However, if an active hydrogen activation catalyst which results in hydrogen atom addition to condensed aromatic centers can be found, more distillable liquids could be formed relative to the quantity of gases.
NASDAQ:SYMM), a worldwide leader in precise time and frequency technologies, announced today that it is offering a new low phase noise (LPN) option for its MHM 2010 Active Hydrogen Maser (Microwave Amplification by Stimulated Emission of Radiation).
Contract award: Procurement of active hydrogen Maser.
With the reactive bismaleimide groups (two terminal -C=C-groups), BMI can polymerize with active hydrogen atom-containing species such as polyamines via the Michael addition reaction mechanism (1-6).
The aqueous primer composition comprises a carbonyl group-containing modified epoxy resin (A), a crosslinking agent (B), and a rust preventive pigment (C), and is characterized in that the carbonyl group-containing modified epoxy resin (A) is produced by reacting an amine compound (al) having a carbonyl group and at least one active hydrogen bonded to a nitrogen atom per molecule and an epoxy resin (a2) having two or more epoxy groups per molecule).