open chain


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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

open chain

Orthopedics adjective Referring to a series of musculoskeletal links that are free to move on each other but capable of combining to support the body; the chain is said to be open when the distal link is free to move and closed when it is fixed; in OC motion, the calcaneum supinates and pronates about the subtalar joint
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
They require more balance and coordination than open chain activities and are more sport-specific and time-efficient.
Along the way, Demaine, Rote, and Connelly also established that any open chain can always be straightened.
As for the position of hip joint, the following open chain equation can be used:
Opponents say metal nets are very dangerous and point to the injuries sustained by a young Walpole girl who was playing basketball with her friends and seriously injured her hand on an open chain link.
For example, the 25-inch reel mower attachment has no guard to cover the open chain drive.
To synthesize rapamycin -- a 31-carbon ring structure -- the scientists first constructed an open chain of 29 carbons.
Another surprising fact about KFC was that it was the first restaurant business to open chains outside of united states, greatly expanding its presence internationally.