Concept information
Preferred term
Humic Substances
Type
-
mesh:Descriptor
Definition
- Organic matter in a state of advanced decay, after passing through the stages of COMPOST and PEAT and before becoming lignite (COAL). It is composed of a heterogenous mixture of compounds including phenolic radicals and acids that polymerize and are not easily separated nor analyzed. (E.A. Ghabbour & G. Davies, eds. Humic Substances, 2001). A complex mixture of dark colored hetero-polymeric phenolic compounds found in HUMUS; COAL; and PEAT; resulting from the decomposition of organic matter, particularly dead plants. They are soluble in alkali and carbonates, only slightly soluble at physiological pH, and can chelate metals.
Broader concept
Entry terms
- 1415-93-6
- Humic Substance
Allowable Qualifier(s)
- adverse effects (Qualifier)
- analysis (Qualifier)
- classification (Qualifier)
- economics (Qualifier)
- history (Qualifier)
- microbiology (Qualifier)
- parasitology (Qualifier)
- poisoning (Qualifier)
- radiation effects (Qualifier)
- standards (Qualifier)
- statistics & numerical data (Qualifier)
- supply & distribution (Qualifier)
- toxicity (Qualifier)
- virology (Qualifier)
Pharmacological Action(s)
In other languages
-
French
-
1415-93-6
URI
http://data.loterre.fr/ark:/67375/JVR-XZBRTMP3-L
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