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americium

Overview page. Subjects: chemistry — physics.

Symbol Am. A radioactive metallic transuranic element belonging to the actinoids; a.n. 95; mass number of most stable isotope 243 (half-life 7.95 × 103 years); r.d. 13.67 (20°C); m.p. 994 ±...

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amethyst

Overview page. Subjects: art — chemistry.

The purple variety of the mineral quartz. It is found chiefly in Brazil, the Urals (Soviet Union), Arizona (USA), and Uruguay. The colour is due to impurities, especially iron oxide. It is...

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amicyanin

Overview page. Subjects: chemistry.

A bacterial electron transfer protein containing a type 1 copper site.

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amidase

Overview page. Subjects: chemistry.

1 any enzyme that catalyses the hydrolysis of an ester.

2 EC 3.5.1.4; acylamide amidohydrolase; an enzyme that catalyses the hydrolysis of a...

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amidate

Overview page. Subjects: chemistry.

To convert any oxy acid into its corresponding amide.

—amidated adj.; amidation n.

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amide

Overview page. Subjects: chemistry.

1 Organic compounds containing the group –CO.NH2 (the amide group). Compounds containing this group are primary amides. Secondary and tertiary amides can also exist, in which...

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amidination

Overview page. Subjects: chemistry.

The process or reaction of introducing an amidino group into a chemical entity.

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amidine

Overview page. Subjects: chemistry.

Any compound of the type R−C(=NH)−NH2.

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amidino

Overview page. Subjects: chemistry.

The monovalent group −C(=NH)−NH2.

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amidolysis

Overview page. Subjects: chemistry.

Any cleavage of an amide (including a peptide) to the parent oxy acid and ammonia or an amine.

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