| heme | 1. <biochemistry> Compounds of iron complexed in a porphyrin (tetrapyrrole) ring that differ in side chain composition. Haems are the prosthetic groups of cytochromes and are found in most oxygen carrier proteins. 2. <prefix> haem-, eaning relating to blood. Origin: G. Haima (21 Jun 2000) |
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| apolar interaction | <chemistry> The attractive force between molecules due to the close positioning of non-hydrophilic portions of the two molecules. (09 Oct 1997) |
| hydrophobic interaction | <chemistry> The attractive force between molecules due to the close positioning of non-hydrophilic portions of the two molecules. (09 Oct 1997) |
| specimen interaction | <microscopy> Reactions that occur inside the specimen when being struck with a beam of energetic electrons or ions. (05 Aug 1998) |
| specimen interaction volume | <microscopy> The volume inside the specimen in which all specimen interactions occur during electron beam irradiation. (05 Aug 1998) |
| DNA-protein interaction | <molecular biology> Any complex that forms between a protein molecule and DNA. Examples are nucleosomes (structures formed for the purpose of DNA storage) and any gene regulatory protein (a protein which regulates transcription by binding to a regulatory region on the DNA). (09 Oct 1997) |
| drug-drug interaction | The effects that occur when two or more drugs are used together. Such effects include changes of absorption in the digestive tract, changes in rate of the drugs' breakdown in the liver, new or enhanced side effects and changes in the drugs' activity. (09 Oct 1997) |
| drug interaction | <pharmacology> A chemical or physiologic reaction that can occur when two different medications are taken together and the interaction may affect the metabolism, effectiveness or toxicity of the other. (18 Jul 2002) |
| interaction | The quality, state or process of (two or more things) acting on each other. (18 Nov 1997) |
| interaction process analysis | In psychology, analysis of small group behaviour in terms of 12 specific categories, e.g., solidarity, tension release, agreement. (05 Mar 2000) |