| chemicocautery | Any substance that destroys tissue upon application. Synonym: chemical cautery, chemicocautery. (05 Mar 2000) |
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| chemiluminescence | <chemistry> Light emitted as a reaction proceeds. Becoming used increasingly to assay ATP (using firefly luciferase) and the production of toxic oxygen species by activated phagocytes (using luminol or lucigenin as bystander substrates that release light when oxidized). See: bioluminescence. (18 Nov 1997) |
| chemiluminescence assays | Including a subcategory using bioluminescence (biologically derived chemiluminescence agents), use the generation of light from oxidative chemical reactions as an indicator of the quantity of unbound luminescent labelled antigen. This allows quantitation of unlabelled antigen from patient specimens in a variety of homogeneous (single phase) or heterogeneous (multiple phase) immunoassay techniques. (05 Mar 2000) |
| chemiluminescent labeling | A technique of labeling DNA strands, two different DNA probes emit light when they come together in the same region of a gene. (09 Oct 1997) |
| chemiosmosis | <biochemistry, cell biology> A theoretical mechanism (proposed by Mitchell) to explain energy transduction in the mitochondrion. As a general mechanism it is the coupling of one enzyme catalysed reaction to another using the transmembrane flow of an intermediate species. For example Cytochrome oxidase pumps protons across the mitochondrial inner membrane and ATP synthesis is driven by re entry of protons through the ATP synthesising protein complex. The alternative model is production of a chemical intermediate species, but no compound capable of coupling these reactions has ever been identified. (18 Nov 1997) |
| chemiosmotic coupling | The linking of ATP synthesis to electrontransfer by way of an electrochemical hydrogen cation gradient across amembrane. (09 Oct 1997) |
| chemiosmotic hypothesis | <biochemistry, cell biology> A theoretical mechanism (proposed by Mitchell) to explain energy transduction in the mitochondrion. As a general mechanism it is the coupling of one enzyme catalysed reaction to another using the transmembrane flow of an intermediate species. For example Cytochrome oxidase pumps protons across the mitochondrial inner membrane and ATP synthesis is driven by re entry of protons through the ATP synthesising protein complex. The alternative model is production of a chemical intermediate species, but no compound capable of coupling these reactions has ever been identified. (18 Nov 1997) |
| chemiosmotic theory | The theory that the synthesis of ATP (an energy source made and used by the organism) within mitochondria and chloroplasts occurs by way of a proton gradient which forms when electrons are passed through their inner membranes. When protons are then passed through the inner membrane in the opposite direction, energy is released and used to make ATP. (09 Oct 1997) |
| chemiotaxis | A response of motile cells or organisms in which the direction of movement is affected by the gradient of a diffusible substance. Differs from chemokinesis in that the gradient alters probability of motion in one direction only, rather than rate or frequency of random motion. (18 Nov 1997) |
| chemise | A square of gauze fastened to a catheter passed through its centre; used to retain a tampon packed around the catheter inserted into a wound, such as that resulting from a perineal section. Origin: Fr. Shirt (05 Mar 2000) |
| chemist | 1. A specialist or expert in chemistry. 2. Pharmacist (British). (05 Mar 2000) |
| chemistry | The scientific study of the composition, structure, properties, andinteractions of chemicals. (09 Oct 1997) |
| chemistry, analytical | The branch of chemistry dealing with detection (qualitative) and determination (quantitative) of substances. (12 Dec 1998) |
| chemistry, bioinorganic | A field of chemistry which pertains to the study of inorganic compounds or ions in biological systems. (12 Dec 1998) |
| chemistry, clinical | The specialty of analytical chemistry applied to assays of physiologically important substances found in blood, urine, tissues, and other biological fluids for the purpose of aiding the physician in making a diagnosis or following therapy. (12 Dec 1998) |
Synonyms : Organic Chemistry
Synonyms : Chemistry, Pharmaceutic, Pharmaceutic Chemistry, Pharmaceutical Chemistry, Chemistry, Medicinal, Drug Formulations, Formulation, Drug, Formulations, Drug
Synonyms : Physical Chemistry, Chemistries, Physical, Physical Chemistries
| chemical equation |
an equation that expresses a chemical reaction, the symbols on the left of the equation denoting the substances before, and those on the right those after, the reaction.
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| chemical incompatibility |
the quality of not being miscible with another given substance without a chemical change.
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| chemical mediation |
in neurophysiology, the intervention by a chemical substance (neurotransmitter) in the passing of an action potential from a presynaptic to a postsynaptic element.
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| chemical sense |
the senses of smell (olfaction) and taste.
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| chemical affinity |
the tendency of an atom or compound to combine by chemical reaction with atoms or compounds of unlike composition.
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| chemi | warfare using chemical agents to kill or injure or incapacitate the enemy |
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| chemi | with respect to chemistry |
| chemi | by the use of chemicals |
| chemi | luminescence resulting from a chemical reaction as the oxidation of luciferin in fireflies |
| chemi | relating to the phenomenon of chemiluminescence |
| chemi | a card game played in casinos in which two or more punters gamble against the banker |
| chemi | a loose-fitting dress hanging straight from the shoulders without a waist |
| chemi | a woman's sleeveless undergarment |
| chemi | take up a substance by chemisorption |
| chemi | adsorption (especially when irreversible) by means of chemical instead of physical forces |
| chemi | having the capacity to adsorb by chemical as contrasted with physical forces |
| chemi | a scientist who specializes in chemistry |