In many owls the right and left ears are asymmetrical, and this asymmetry affects the whole of the temporal region, all the bones which surround the outer and middle ear, notably the squamosal and the quadrate, so that the skull becomes lopsided, one ear being turned obliquely down, the other upwards.
Of the tri-substitution derivatives, 1.2.3.-compounds are known as " adjacent " or " vicinal " (v), the 1.2.4 as " asymmetrical " (as), the 1.3.5 as " symmetrical " (s), of the tetrasubstitution derivatives, 18.104.22.168-compounds are known as " adjacent," 22.214.171.124 as " asymmetrical," and 126.96.36.199 as " symmetrical."
Ordinarily a substance composed of asymmetrical molecules is paramagnetic, but if the elementary magnets are so conditioned by their strength and concentration that mutual action between them is possible, then the substance is ferromagnetic. In all cases however it is the diamagnetic condition that is initially set up - even iron is diamagnetic - though the diamagnetism may be completely masked by the superposed paramagnetic or ferromagnetic condition.
A curious and interesting modification of the indirect method, known as " asymmetrical division," occurs frequently in epitheliomata, sarcomata, &c. (Hansemann).
- Asymmetrical diaster.
If the nitrogen atom in the quaternary ammonium salts be in combination with four different groups, then the molecule is asymmetrical, and the salt can be resolved into optically active enantiamorphous isomerides.
The hinder abdominal segments in the male show a curious asymmetrical arrangement, the sixth segment bearing on its upper side a small stalked plate (strigil) of unknown function, furnished with rows of teeth.
Very asymmetrical, with a single large posterior adductor.
Asymmetrical, inequivalve, fixed, with extensive pallial sutures; no siphons.
Their bilateral symmetry is obviously to be regarded as primitive, and the nervous system shows an original condition from which that of the asymmetrical twisted Gastropods can be derived.
The symmetrically substituted ureas are generally tasteless, while the asymmetrical derivatives are sweet.
On such an interpretation, variation would result from asymmetrical division and normal inheritance from symmetrical division.
Trinitrobenzenes, C 6 H 3(N02)3.-Asymmetrical (1.2.4) trinitrobenzene results from the action of fuming nitric and sulphuric acids on para-dinitrobenzene.
In this species the atrium is produced as an asymmetrical blind pouch behind the atriopore as far as the anus.
The larva is curiously asymmetrical, as many as fourteen gill-clefts appearing in an unpaired series on the right side, while the mouth is a large orifice on the left side, the anus being median.
Other than cataclysm, asymmetrical attack, or government gone wild, we have little to worry about.