| metalloid | Formerly, the metallic base of a fixed alkali, or alkaline earth; applied by Sir H. Davy to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined. Now, one of several elementary substances which in the free state are unlike metals, and whose compounds possess or produce acid, rather than basic, properties; a nonmetal; as, boron, carbon, phosphorus, nitrogen, oxygen, sulphur, chlorine, bromine, etc, are metalloids. Origin: L. Metallum metal: cf. F. Metalloide. Source: Websters Dictionary (01 Mar 1998) |
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| metallophilia | Affinity for metal salts; e.g., the affinity of the cytoplasm of cells of the reticuloendothelial system for silver carbonate stain and salts of gold and iron. Origin: metallo-+ G. Philos, fond (05 Mar 2000) |
| metallophobia | <psychology> Morbid fear of metal objects. Origin: G. Metallon, metal, + phobos, fear (05 Mar 2000) |
| metalloporphyrin | A combination of a porphyrin with a metal, e.g., Fe (haematin), Mg (as in chlorophyll), Cu (in haemocyanin), Zn. (05 Mar 2000) |
| metalloporphyrins | Porphyrins which are combined with a metal ion. The metal is bound equally to all four nitrogen atoms of the pyrrole rings. They possess characteristic absorption spectra which can be utilised for identification or quantitative estimation of porphyrins and porphyrin-bound compounds. (12 Dec 1998) |
| metalloprotein | <protein> A protein that contains a bound metal ion as part of its structure. (18 Nov 1997) |
| metalloproteinases | <enzyme> Peptide hydrolases which use a metal in the catalytic mechanism. This group of enzymes is inactivated by metal chelators. Registry number: EC 3.4.24 (12 Dec 1998) |
| metalloproteins | Proteins that have one or more tightly bound metal ions forming part of their structure. (12 Dec 1998) |
| metalloscopy | Testing the action of various metals applied to the surface of the body. Origin: metallo-+ G. Skopeo, to examine (05 Mar 2000) |
| metallotherapy | <medicine> Treatment of disease by applying metallic plates to the surface of the body. Origin: L. Metallum metal + E. Therapy. Source: Websters Dictionary (01 Mar 1998) |
| metallothionein | <biochemistry> Small cysteine rich metal binding protein found in the cytoplasm of many eukaryotes. Synthesis can be induced by heavy metals such as zinc, cadmium, copper and mercury and metallothioneins probably serve a protective function. Metallothionein gene promoters are used in studies of gene expression. (18 Nov 1997) |
| metallurgy | The science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of metals used in dentistry, with special reference to orthodontic and prosthodontic appliances. (12 Dec 1998) |
Synonyms : Isometallothionein, Metallothionein A, Metallothionein B, Metallothionein I, Metallothionein II, Metallothionein IIA
Synonyms : Industries, Heavy, Heavy Industry, Industry, Heavy
| metalloprotein |
A protein that contains a metal ion (or ions; such as Fe 2+ , Cu 2+ or Zn 2+ ) as a prosthetic group, which is coordinated by amino-acid side chains.
출처: www.nature.com/nrm/journal/v6/n2/glossary/nrm1569_...
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| metallothionein |
A small Cys-rich protein that binds metal ions ?in particular, Zn2+ and/or Cu2+ ?at least in part, through complex formation with cysteine thiolate.
출처: www.nature.com/nrm/journal/v6/n2/glossary/nrm1569_...
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| metallurgy |
the study of metals and alloys
출처: www.msnucleus.org/membership/html/k-6/rc/dictionar...
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| metalloid |
An element with properties intermediate between those of metals and nonmetals. Borders the heavy, stepped, diagonal line on the periodic chart.
출처: www.hillsdale.edu/AcademicAssociations/Chemistry/s...
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| metallizing |
(1) The application of an electrically conductive metallic layer to the surface of nonconductors. (2) The application of metallic coatings by nonelectrolytic procedures such as spraying of molten metal and deposition from the vapor phase.
출처: www.ntu.edu.sg/home/asjqiu/corrosion/J-Q.HTM
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