(n.) One who contends with another, especially in combat; an adversary; an opponent.
(n.) A muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.
(n.) A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.
(a.) Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.
Example Sentences:
(1) This death is also dependent on the presence of chloride and is prevented with the non-selective EAA antagonist, kynurenic acid, but is not prevented by QA.
(2) Microionophoretically applied excitatory amino acids induced firing of extracellularly recorded single units in a tissue slice preparation of the mouse cochlear nucleus, and the similarly applied antagonist 2-amino-5-phosphonovalerate (2APV) was demonstrated to be a selective N-methyl-D-aspartate (NMDA) receptor antagonist.
(3) Meanwhile the efficiency of muscarinic antagonists in inhibition of tremor reaction induced by arecoline administration is associated with interaction between the drugs and the M2-subtype.
(4) The anticonvulsant properties of the endogenous excitatory amino acid antagonist, kynurenic acid (KYA), were studied in prepubescent and adult rats using the amygdaloid kindling model of epilepsy.
(5) A novel bicyclic prostaglandin analogue, (1S)-[1 alpha,2 alpha(Z),3 alpha,4 alpha]-7-[3-[(hexylthio)methyl]-7- oxabicyclo [2.2.1]hept-2-yl]-5-heptenoic acid ((-)-10), and its cogeners were found to be potent antagonists at the TxA2 receptor.
(6) This difference was abolished by exposure of the slices to propranolol, a beta-adrenergic receptor antagonist.
(7) The TxA2 antagonistic effects of KW-3635 were compared with that of daltroban in PRP from various animals species.
(8) In experiments performed to determine whether PtdIns(4,5)P2 hydrolysis induced by TRH may have been caused by the elevation of [Ca2+]i, the following results were obtained: the effect of TRH to decrease the level of PtdIns(4,5)P2 was not reproduced by the calcium ionophore A23187 or by membrane depolarization with 50 mM K+; the calcium antagonist TMB-8 did not inhibit the TRH-induced decrease in PtdIns(4,5)P2; and, most importantly, inhibition by EGTA of the elevation of [Ca2+]i did not inhibit the TRH-induced decrease in PtdIns(4,5)P2.
(9) Similarly, 50 microM D-600, a Ca+2 channel antagonist, significantly (P less than 0.01) reduced basal and 5-HETE-induced PRL release.
(10) Selective removal of endothelium had no effect on BK-induced contraction or the action of the antagonists.
(11) The second experiments entailed use of the nonspecific opiate antagonist, naloxone, as well as the specific delta antagonist, ICI 154,129, against seizures induced by icv-administered morphine, morphiceptin, DADL, or DSLET.
(12) These antagonists reverse NMDA-mediated long term influence in these brain areas.
(13) This novel mechanism of receptor regulation, named transmodulation, should be distinguished from the reduction in total receptor number caused by the homologous ligand (downregulation) and from the change in affinity produced by the binding of agonists or antagonists to the same receptor site.
(14) Furthermore, the ability of a vasopressin antagonist to lower arterial pressure in NTS hypertensive rats was markedly attenuated by clonidine treatment.
(15) All of the serotonergic antagonists studied had additional effects on the response of the coronary artery to electrical stimulation or to norepinephrine.
(16) Their receptive fields comprise a temporally and spatially linear mechanism (center plus antagonistic surround) that responds to relatively low spatial frequency stimuli, and a temporally nonlinear mechanism, coextensive with the linear mechanism, that--though broad in extent--responds best to high spatial-frequency stimuli.
(17) The effects of low doses of dihydropyridine (DHP) calcium channel antagonists nimodipine, nifedipine, (-)-R-202-791, and amlodipine, the DHP calcium channel agonist BAY K 8644 were investigated on clonic convulsions to pentylenetetrazole (PTZ) in mice.
(18) Addition in the cultures of 4-deoxypyridoxine, a potent antagonist of vitamin B6 coenzymes, concurrently with the mitogen, inhibits the induction of serine hydroxymethyltransferase.
(19) These results suggest that prevention of xenograft rejection using PAF-antagonist in association with other methods should be further investigated.
(20) The high concentrations of gonadotropins present in immature female rats by the end of the second week of life were suppressed by treatment with an antagonist against luteinizing hormone-releasing hormone (LHRH-A; Org.
Foil
Definition:
(v. t.) To tread under foot; to trample.
(v. t.) To render (an effort or attempt) vain or nugatory; to baffle; to outwit; to balk; to frustrate; to defeat.
(v. t.) To blunt; to dull; to spoil; as, to foil the scent in chase.
(v. t.) To defile; to soil.
(n.) Failure of success when on the point of attainment; defeat; frustration; miscarriage.
(n.) A blunt weapon used in fencing, resembling a smallsword in the main, but usually lighter and having a button at the point.
(n.) The track or trail of an animal.
(n.) A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.
(n.) A thin leaf of sheet copper silvered and burnished, and afterwards coated with transparent colors mixed with isinglass; -- employed by jewelers to give color or brilliancy to pastes and inferior stones.
(n.) Anything that serves by contrast of color or quality to adorn or set off another thing to advantage.
(n.) A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection.
(n.) The space between the cusps in Gothic architecture; a rounded or leaflike ornament, in windows, niches, etc. A group of foils is called trefoil, quatrefoil, quinquefoil, etc., according to the number of arcs of which it is composed.
Example Sentences:
(1) The magnitude of improvement achieved is dependent upon field size, SSD, the atomic number of the foil material, and foil thickness.
(2) Membranes were sandwiched between two gas-permeable, plastic foils, placed in a sealed cuvette, and gassed with H2 as reductant or O2 as oxidant.
(3) Based on the macrophage-specific release using crystalline silica, and the production and secretion of at least three hemopoietic regulatory factors (erythropoietin, colony stimulating factor and a multipotential stem cell enhancing and maintaining factor) into the extracellular fluid of bone marrow-derived macrophages grown on hydrophobic teflon foils, a hypothesis for the regulation of hemopoiesis is proposed.
(4) The entrance window is 12 microns Melinex foil with a thin aluminium surface.
(5) The present study investigated these inconsistencies by manipulating nonword foil lexicality (i.e., the similarity of nonword foils to words), semantic priming, and word frequency in two lexical decision experiments.
(6) International negotiations extend over long periods of time and there are significant steps that we still have to undertake, but the important thing is to continue to make forward progress.” Rich countries accused of foiling effort to give poorer nations a voice on tax Read more Manuel Montes , however, senior adviser on finance and development at the South Centre in Geneva and one of the architects of the financing for development process, felt developing countries had lost more than they had gained.
(7) Mononuclear cells were isolated from whole blood by cytapheresis and cultured for 7 days with 2% autologous serum on hydrophobic Teflon foils.
(8) Maybe it will do him good to go away with England.” Such is the cyclical life of goalscorers, there are times when those fractions that can be the difference between a ball ending up nestled in the net, or agonisingly wide, or foiled by a goalkeeper that probably seems 10 feet tall, loom large.
(9) A stick, 5 to 6 cm long, made of a glass capillary tube, or, aluminium foil, with ends bended as a hock, are weighted up to 0.001 g. Introduce one stick previously weighted in diluted plasma.
(10) The colour to channel for next season is, in fact, not matt buttercup yellow but the gold-foil sheen best explained as the colour of the toffee penny in a box of Quality Street.
(11) I think it was just excited commentary, and it sounds like people are trying to get a lot out the door in terms of Christmas purchases of books.” On Monday morning, Morrison insisted the phone call was of “no consequence” and that linking it with the September spill amounted to “tin foil hat conspiracies”.
(12) A reason for this is the worse demarcability of the pre-beta-lipoprotein proportion in the curves of the densitometre of acetate foils.
(13) A new cell culture technique is described which is based on the observation that foils cast from the melamine resin hexamethylol-melamine-ether are suitable for the cultivation of beating heart muscle cells and fibroblasts of the rat.
(14) The parent nuclide, W-178 (half-life 21.7 d), was produced in the Michigan State University cyclotron by proton bombardment of stacked natural tantalum-foil targets.
(15) A plastic IUD bearing copper foil (42 mm2) was inserted into one horn of the rabbit uterus and a physically similar platinum-bearing IUD in the contralateral horn served as a control.
(16) This study compared the performance of a new computerized occlusal analysis (T-Scan) system with that of Accufilm and Shimstock foil for the registration of tooth contacts on a laboratory model.
(17) Four lead layers (three additional foils equalling 3.92 x 10(-3) mm of lead) on the conventional film package resulted in a significant dose reduction.
(18) From then on, different features were added over the years, including more use of colour, watermark portraits of the queen, highly detailed machine engravings, reflective foil patches and holographic strips.
(19) A lovely counterattack following some ponderous behaviour by NZ outside the Slovakia box, before Vittek was foiled as he was about to pull the trigger.
(20) The nuclear regulation authority said the radiation comprised mostly beta rays that could be blocked by aluminium foil, unlike more penetrative gamma rays.