A cytoplasmic zinc finger protein (790 aa) that inhibits NF κ B activity and TNF-mediated programmed cell death. The expression of the A20 mRNA is upregulated by TNF α . It is a dual function enzyme with deubiquitinating and ubiquitin ligase activity that triggers degradation of RIP ( receptor interacting protein kinase ) an essential mediator of the TNF receptor-1 signalling...
In taxonomy, a new, replacement name, published as a substitute for an invalid one (e.g. a junior synonym).
A system of hierarchical classification that proceeds by subdividing the whole into successively smaller and more homogeneous units.
In taxonomy, a name that must be rejected under the rules of the Code and is therefore illegitimate.
The mass per unit volume of soil particles, usually expressed in grams per cubic centimetre. Compare bulk density.
; order Orthoptera, suborder Ensifera)Family of primitive ensiferans, which includes only three living species.
The percentage of all alleles at a given locus in a population gene pool represented by a particular allele. For example, in a population containing 20 AA, 10 Aa, and 5 aa, the frequency of the A ...
(family Arecaceae)A monotypic genus, C. nucifera, the coconut (‘nature's greatest gift to man’) which grows wild on sandy coasts from the east coast of Africa to Polynesia, and also in the Caribbean. ...
An ordination technique for the description of vegetation based on characteristics of the site rather than the composition of species. One or more environmental gradients are identified and stands ...
A body of rock that has been transported to its present position, usually over a considerable distance. See allochthonous.
The state of being perceptible to hearing. The limits of audibility of the human ear are between about 20 hertz (a low rumble) and 20 000 hertz (a shrill whistle). With increased age the upper limit ...
1 A tree stump that is capable of producing new shoots.2 The permanent base of a coppiced tree.
A general term used to describe either a glacial stage (e.g. Devensian) or an indeterminate period of glaciation.
In taxonomy, a name that has not been published properly, or is unavailable, and which is therefore invalid.
A soil that mixes itself: its surface layers shrink and swell, forming deep cracks into which soil falls.
Two or more contiguous pedons, which are all within the defined limits of a single soil series.
Term proposed by J. H. Connell in 1980 to describe one possible reason for observed differentiations in niches. Competing species may be less fit than a species which avoids competing because it ...
A woodland comprising trees that have not been planted by humans, and where no human interference has occurred.
A hollow, dart-like structure produced by certain parasitic barnacles (e.g. Sacculina carcini) that pierces the cuticle of the host.