(v. t.) To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.
Example Sentences:
(1) The origins of aging of higher forms of life, particularly humans, is presented as the consequence of an evolved balance between 4 specific kinds of dysfunction-producing events and 4 kinds of evolved counteracting effects in long-lived forms.
(2) Conversely, rat galanin increased unstimulated glucagon output (approximately 20%, P less than 0.05), potentiated the glucagon response to arginine (approximately 50%, P less than 0.05) and VIP (approximately 90%, P less than 0.05), and counteracted the suppressor effect of glucose on alpha-cell secretion.
(3) This inhibition is counteracted by the somewhat slower increase of NE turnover resulting in normalization of LH levels.
(4) These results suggest that CPZ interacts with smg p21B, smg GDS, or both, and thereby inhibits the smg GDS action, and that CPZ also interacts with the acidic phospholipids and thereby counteracts their inhibitory effect on the smg GDS action.
(5) Extracts from arrested cells counteracted the stimulating effects of extracts from proliferating cells with kinetics suggesting competitive interaction between stimulating and inhibitory factors.
(6) Acetylcholine increases their turnover, Atropine reduces it, and the addition of atropine counteracts the effect of acetylcholine in all these phospholipids.
(7) Whether they affect ureteral motility in vivo or whether they can counteract ureteral spasm associated with ureteral stones have not been established.
(8) Metoclopramide did not counteract the apomorphine effect and, in higher doses, water intake was even further reduced.
(9) This effect increases with the estrogen dose and is counteracted more effectively by androgenic progestogens such as levonorgestrel than by nonandrogenic progestogens such as desogestrel.
(10) PGE2 counteracted the NA-effect in the former group of patients but did not affect the influence of NA at term.
(11) Addition of heme in vitro (10(-6)M) to the latter nuclei results in a significant counteraction of the decreased cytochrome P-450 (c + d) mRNA transcription.
(12) Two functions of these have been proposed: 1) that they are compatible osmolytes which regulate cell volume (against high external NaCl) without inhibiting proteins and 2) that methylamines (GPC and betaine) are counteracting osmolytes which stabilize proteins against perturbation from high renal urea.
(13) For this rather large pressures (about 700 hPa) are required to overcome the surface forces counteracting droplet formation.
(14) The drop in the blood-sugar levels was counteracted by corresponding infusions of glucose by the BIOSTATOR via a special clamp technique.
(15) In the wild strain (Em 5297a) thiourea is tenfold more toxic on an allantoin medium than on an inorganic nitrogen medium; allantoin as well as urea counteract thiourea toxicity in the allantoin nitrogen medium.
(16) Retinal traction can be counteracted by the oil up to a calculated threshold value, depending on the size and shape of the tear, the strength of the surface tension and, most importantly, the distance between the retina and choroid.
(17) Some of the changes found may be a result of adaptive mechanisms occurring in order to counteract the different biophysical effects of ethanol.
(18) This study evaluates whether suturing of replaced flaps with crown-attached sutures, following reconstructive surgery, counteracts postoperative recession of the gingival margins and facilitates new attachment.
(19) In the present article is shown that the histamine releasing effect is counteracted by the addition of histamine to the superfusion fluid.
(20) This barrier effect was partially counteracted by monensin or carbonyl cyanide m-chlorophenylhydrazone.
Override
Definition:
(v. t.) To ride over or across; to ride upon; to trample down.
(v. t.) To suppress; to destroy; to supersede; to annul; as, one low overrides another; to override a veto.
(v. t.) To ride beyond; to pass; to outride.
(v. t.) To ride too much; to ride, as a horse, beyond its strength.
Example Sentences:
(1) Because haptenated cells can induce immunity if injected subcutaneously or into cyclophosphamide-pretreated recipients (thereby avoiding the induction of suppressor cells), we suggest that the activation of contrasuppressor cells by antigen-antibody complexes overrides suppressive influences in the host, allowing immunity to become dominant.
(2) Although B12 supplementation results in a 10-fold repression of metE-lacZ expression, homocysteine addition to the growth medium overrides the B12-mediated repression.
(3) Morrison and Operation Sovereign Borders commander Lieutenant General Angus Campbell continued to insist that their refusal to answer questions about “on water matters” was essential to meet the overriding goal of stopping asylum seeker boats, and said from now on such briefings on the policy would be held when needed, rather than every week because the “establishment phase” had finished.
(4) As a result, more and more people are beginning to look towards Irish reunification as being a real possibility.” The overriding issue, however, in this most marginal constituency in Northern Ireland is the old binary, sectarian one: the zero-sum game of orange versus green.
(5) For now, the overriding feeling is helplessness, tinged with shame for the last year of passivity.
(6) The negative feedback inhibition of physiological concentrations of IGF-I on GH, therefore, appears to override the potent stimulation of GH by these intracellular messengers.
(7) Glycosylation failed to completely override the transport block, but allowed some uncleaved hGH-DAF to pass through the secretory pathway and acquire endoglycosidase H resistance.
(8) Throughout, our correspondent establishes his overriding desire simply to be useful, even when he fears he might not be; to Charles Clarke, secretary of state for education – “If you can bear to receive a report on this year’s Education Summer School from someone with such old-fashioned views (!)
(9) Under some conditions, visual information can override auditory information to the extent that identification judgments of a visually influenced syllable can be as consistent as for an analogous audiovisually compatible syllable.
(10) A direction from the family court that an asylum seeker should have access to a child in Australia does not override the department’s obligation to remove the asylum seeker.
(11) These results demonstrate that ET-1 and possibly other vasoactive substances of endothelial origin, override the compensatory mechanism of normal pregnancy with respect to the blunted responsiveness to AII and VP.
(12) The overriding common features of these ailments are the gender of their sufferers and the behavioral symptoms they exhibit.
(13) It could be used: (1) to assure that only patients actually ingesting medication are used to evaluate new drugs, (2) to study the factors that influence compliance and strategies to improve compliance, (3) to prevent escalation to more toxic drugs or expensive diagnostic procedures when failure to respond is due to poor compliance, (4) to supervise compliance when society has an overriding interest in therapeutic success, and (5) to monitor the effects of air pollution.
(14) Possible explanations for this lack of effect include (1) interactions with NMDA receptor channels are pressure dependent; (2) other actions of these antagonists override their effects on the NMDA receptor channel.
(15) There is certainly no chance of the sort of "democratic override" that Pinto-Duschinsky himself favours.
(16) Now the vote is in, the overriding sense is of surprise and uncertainty.
(17) The diagnosis of overriding mitral valve should be suspected in any patient with significant conotruncal anomalies and underdeveloped left ventricle, especially the patient with double outlet right ventricle, and in the patient with endocardial cushion defect, hypoplasia of the left ventricle, and obstructive anomalies of the aortic arch.
(18) Filtering and randomization of stimulus timing may attenuate the effects of these overriding potentials.
(19) The difference in kinetics for reversal between these two treatments suggests that myo-inositol addition overrides a biochemical pathway while Ca2+ addition supplants a phosphoinositide-mediated rise in the cation that may be necessary for anaphase onset.
(20) A conclusion is offered that the quality of residential care is dependent on the interaction of variables rather than on the presence of any single overridingly powerful factor.