(a.) Not isometric; having unsymmetrical parts; -- said of crystals with three unequal axes.
Example Sentences:
(1) The conversion of a stable population of anisometric cells to isometric dimensions constitutes a novel mechanism for altering the proportions of an epithelial sheet during development.
(2) The progressive acquisition of a timing performance with isometric and anisometric responses was investigated in conditions of 'inconsistent feedback', with two different methods: counting seconds or not.
(3) The electrical activity of the biceps brachii and pronator teres muscles is studied through the prono-supination of the forearm in some anisometrical conditions (dynamic work) when the inertia of the mobile system and the elbow position are being varied.
(4) The molecule is a flat, strongly anisometric particle with radius of gyration 115 A, volume 1,8 X 10(6) A3, maximum size 380 A, thickness 35-40 A.
(5) Discharges of red nucleus neurons were analyzed in the cat during voluntary muscle contractions performed under isometric and anisometric conditions.
(6) Experiments reported in the literature, as well as our own, were categorized according to technique into one of four types: (1) isometric-isotonic, (2) isometric-anisotonic,(3) anisometric-isotonic or (4) anisometric-anisotonic.
(7) We compared matching of finger forces under isometric conditions with matching of forces produced against a spring load (anisometric conditions) in twenty normal subjects.
(8) The actual configuration of hypercolumns is in register with two possible templates for the self-organization of orientation selectivity: the isometric cytochrome oxidase blobs of the colour system, and the anisometric slabs of the ocular dominance system.
(9) A self-assembly procedure which accounts for the anisometric growth and shaping of a template and its microtubule bundle is proposed.
(10) Most insect oocytes, and the follicles which surround them, grow anisometrically as they assume shapes which approximate to those of long prolate spheroids.
(11) Also, this equation predicts linear relations for anisometric-isotonic contractions, and quadratic relations for an accelerated rate of contraction, between the average electromyogram and force of contraction.
(12) The density of spikes of spike output (SO) recorded by means of three bifilar semimicroelectrodes simultaneously implanted in the biceps brachii has been studied during elbow flexions performed against inertia and with a variable velocity (anisometric, anisotonic contractions).
(13) Maintenance of anisometric force was found to be nearly normal in patients with severe deficits in controlling isometric force.
(14) Variations of the soleus H-reflex were studied during voluntary isometric or anisometric contractions of the tibialis anterior in man.
(15) The muscles are fatigued by voluntary anisometric anisotonic contractions against an elastic resistance in man, and by maximal tetanic contractions in the frog and the rat.
(16) Thus with an axial ratio of about 1:0.36 the enzyme is of very anisometric shape.
(17) The enzyme has a peptide weight near 180 000 and, in high salt, is a monomeric, probably highly anisometric molecule.
(18) From the relation established between the instantaneous values of So and force it can be concluded that the shape of force increase in anisometric, anisotonic conditions is entirely related to that of MU recruitment, although the absolute value of force depends on both the firing frequency and the number of active MUs.
(19) In all cases, the transport was found to be anisometric, the extent of the spreading being much greater parallel than perpendicular to the collagen fibers.
(20) The importance of anisometric transport in anisotropic tissues was indicated.
Unsymmetrical
Definition:
(a.) Wanting in symmetry, or due proportion pf parts.
(a.) Not symmetrical; being without symmetry, as the parts of a flower when similar parts are of different size and shape, or when the parts of successive circles differ in number. See Symmetry.
(a.) Being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom.
Example Sentences:
(1) In the scope of our research about the antimicrobial activity of aldehyde-amin-condensates a number of partly new unsymmetrically substituted animals was synthesized by reaction of formaldehyde with different secondary amines.
(2) The thiocarboxyl group reacts with diaryl disulfides to give an unsymmetrical acyl disulfide in dimethylformamide (DMF) and a symmetrical diacyl disulfide in aqueous DMF.
(3) Embryotoxicity has been demonstrated at very high exposures but not at occupationally encountered levels for hydrazine and unsymmetrical dimethylhydrazine.
(4) In an extension of promising inhibitory results in vitro against Histoplasma capsulatum, correlated earlier using substituent constants developed by regression analysis with 77 disulfides, one symmetrical and 14 unsymmetrical disulfides were prepared (3--17).
(5) These five-coordinate heme proteins afford a relatively weak and unsymmetric signal in the Soret region of the MCD spectrum.
(6) The alpha band was unsymmetrical and showed a main peak at 558 nm with a shoulder at around 556 nm.
(7) 1,1-Dimethylhydrazine or unsymmetrical dimethylhydrazine (UDMH) is a highly volatile and reactive compound used primarily as a liquid rocket propellant.
(8) It may be shown, that unsymmetrically substituted animals have both germistatic activity mainly versus Staphylococcus aureus and Bacillus subtilis and germicidal activity especially versus Pseudomonas aeruginosa, Proteus vulgaris, Trichophyton mentagrophytes and Micosporum gypseum.
(9) There are two symmetry nonequivalent molecules in the unit cell, each of which has an unsymmetrical configuration with an unsymmetrical O-H...O = C intramolecular hydrogen bond.
(10) The synthesis of unsymmetrically substituted 1,4-bis[(aminoalkyl)amino]anthracene-9,10-diones bearing one "mitoxantrone side arm" and another (aminoalkyl)amino moiety has been described.
(11) In a modified Ames test system the unsymmetrically substituted chlorinated ethylenes are found mutagenic (tri-,1,1-dichloroethylene and vinyl chloride), whereas symmetrically substituted molecules are inactive.
(12) In at least two instances (the Ar H and the Ar 5-OCH3, 1 and 4) the unsymmetrical nitrogen substitution led to a substantial increase in potency as well as oral activity when compared to the symmetrical dimethyl homologues.
(13) Reduction with tributylphosphine in aqueous organic media generates the free thiol function for a selective conjugation of these immunomodulants with target molecules via unsymmetrical disulfide bridging with a second thiol group by the sulfenohydrazide procedure or via thio-ether linkage by the addition to maleimido--or aziridine-derivatives.
(14) A fluorogenic substrate with an unsymmetrical carbonyl for the sensitive assay of mammalian carbonyl reductase activities, 4-(6-methoxy-2-benzoxazolyl)acetophenone (I), has been prepared.
(15) A series of symmetrically and unsymmetrically N,N'-diaryl-substituted amidinomethyl diethyldithiocarbamates and corresponding amides have been synthesized and tested for potential radioprotective activity.
(16) The former are considered to be three-dimensionally unsymmetrical and curved, and the latter symmetrical and straight.
(17) Both symmetrical reagents (disulfiram, 2,2'- and 4,4'-dithiodipyridines) and unsymmetrical reagents (methyl diethylthiocarbamyl disulphide, methyl 2- and 4-pyridyl disulphides) were investigated.
(18) It is observed that the molecule adopts a novel unsymmetrical loop structure in this section which is characterised by sugar geometries which are significantly different compared to the rest of the molecular.
(19) The relative activity profile for unsymmetrical esters (5-15), which indicated the effect of cycloalkyl ring size on activity, was cyclopentyl > cyclohexyl > cyclobutyl.
(20) Although an increased production of aldehydes was observed with the induced microsomes compared with the non-induced microsomes, no marked differences were noted between the two alkyl groups of these unsymmetric nitrosodialkylamines in regard to the extent of alpha-hydroxylation with the exception of N-nitroso-N-methylbutylamine (NMBA).