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chain

 [chān]
a collection of objects linked together in linear fashion, or end to end, as the assemblage of atoms or radicals in a chemical compound, or an assemblage of individual bacterial cells.
branched chain an open chain of atoms, usually carbon, with one or more side chains attached to it.
closed chain several atoms linked together so as to form a ring, which may be saturated, as in cyclopentane, or aromatic, as in benzene.
H chain (heavy chain) any of the large polypeptide chains of five classes that, paired with the L or light chains, make up the antibody molecule of an immunoglobulin; heavy chains bear the antigenic determinants that differentiate the classes of immunoglobulins. See also heavy chain disease.
J chain a polypeptide occurring in polymeric IgM and IgA molecules.
L chain (light chain) either of the two small polypeptide chains (molecular weight 22,000) that, when linked to H or heavy chains by disulfide bonds, make up the antibody molecule of an immunoglobulin monomer; they are of two types, kappa and lambda, which are unrelated to immunoglobulin class differences.
open chain a series of atoms united in a straight line; components of this series are related to methane.
chain reaction a chemical reaction that is self-propagating; each time a free radical is destroyed a new one is formed.
side chain a group of atoms attached to a larger chain or to a ring.

chain

(chān),
1. chemistry a series of atoms held together by one or more covalent bonds.
See also: sympathetic trunk.
2. bacteriology a linear arrangement of living cells that have divided in one plane and remain attached to each other.
See also: sympathetic trunk.
3. A series of reactions.
See also: sympathetic trunk.
4. In anatomy, a linked series of structures, for example, ossicular chain, chain ganglia , under ganglion.
See also: sympathetic trunk.
[L. catena]

CHAIN

Abbreviation for:
Contact, Help, Advice, and Information Network (Medspeak-UK)
Contrast Hierarchical Alignment and Interaction Network

chain

(chān)
1. chemistry A series of atoms held together by one or more covalent bonds.
2. bacteriology A linear arrangement of living cells that have divided in one plane and remain attached to each other.
3. A series of reactions.
4. anatomy A linked series of structures, e.g., ossicular chain, chain ganglia.
See also: sympathetic trunk

chain

(chān)
bacteriology a linear arrangement of living cells that have divided in one plane and remain attached to each other.
References in periodicals archive ?
They work much like hand chain hoists, but they use a lever instead of a pull chain to rotate the sprocket that activates the lifting mechanism.
Just screw an adapter into the socket, and plug in a utility ceiling fixture with a pull chain. Mount the fixture to the garage ceiling next to the opener, or any other place that's more convenient.
It has two light bulb sockets with pull chains and the original wiring.
A couple of heavy flat straps, salvaged from some old piece of equipment, had been bent into a U-shape at the blacksmith shop and bolted to the front of the sled as hooks for pull chains.
It has a metallic silver glass base, twin pull chains and a linen drum shade.
Pull chains to cinch, tie knots at ends of chains and cut yarn tails.
"A great new technology in today's modern ceiling fans is DC motor technology." He further explains, "DC ceiling fans use about 1/3 the current of the average traditional motor ceiling fans, and on average move more airflow making them about 3 to 4 times more efficient than fans using 120 volt AC motors." Another advantage of DC ceiling fans is that they all come with full function remote controls (or in-wall remotes) with 6 speeds instead of the 3-speed pull chains found on most other ceiling fans.