(v. i.) To pass gradually from a sound, prosperous, or perfect state, to one of imperfection, adversity, or dissolution; to waste away; to decline; to fail; to become weak, corrupt, or disintegrated; to rot; to perish; as, a tree decays; fortunes decay; hopes decay.
(v. t.) To cause to decay; to impair.
(v. t.) To destroy.
(n.) Gradual failure of health, strength, soundness, prosperity, or of any species of excellence or perfection; tendency toward dissolution or extinction; corruption; rottenness; decline; deterioration; as, the decay of the body; the decay of virtue; the decay of the Roman empire; a castle in decay.
(n.) Destruction; death.
(n.) Cause of decay.
Example Sentences:
(1) Q In radioactive decay, different materials decay at different rates, giving different half lives.
(2) 4) Parents imagined that fruit drinks, carbonated beverages and beverages with lactic acid promoted tooth decay.
(3) In the absence of prostigmine, increasing the concentration of ACh in the synaptic cleft did not change the time constant for decay of end-plate currents.
(4) The kinetics of bimolecular decay of alpha-tocopheroxyl free radicals (T) was studied by ESR mainly in ethanol and heptanol solvents.
(5) For those synapses that were close to the soma the time constant for decay for the non-NMDA component, which was voltage insensitive, ranged from 4-8 ms. 7.
(6) In analyzing the results with any regimen it is important to have long follow-up since late relapses do occur and initial very positive results tend to decay with greater numbers of patients treated.
(7) In one normal ear, ten noise trauma ears, 11 Meniere disease ears, and 24 eighth nerve lesion ears to reflexes or reflex decay that were suggestive or retrocochlear lesions were observed.
(8) Biochemical, molecular, and immunohistologic studies have identified membrane cofactor protein (MCP) and decay accelerating factor (DAF) on trophoblast cells, which could assist in preventing lysis of the cells by complement-activating maternal antibodies.
(9) It has been 40 years since the first community in the United States added a regulated amount of fluoride to its public water supply to prevent tooth decay.
(10) This could reflect the existence of a parallel set of synapses with fast decay that serve as a shortterm store.
(11) However, clemastine caused a decay in subjects' performance in both Experiments I and II, but only on the tracking task.
(12) The nylon group had the second highest amount of induced WTR cylinder at one day, which had decayed to ATR cylinder by five months.
(13) The observed signals from germinating seeds of Phaseolus aures and decaying leaves of Eucalyptus are presented to show that the signals have characteristic kinetics and intensity.
(14) We develop an analogy between the steric hindrance among receptors detecting randomly placed haptens and the temporary locking of a Geiger counter that has detected a radioactive decay.
(15) Left ventricular relaxation rate was measured by calculation of a time constant of left ventricular pressure decay (T) derived from an exponential curve fit to the digitized tip-micromanometer left ventricular pressure signal.
(16) Factors increasing presynaptic activity (frequency or number of afferent stimulations) during the induction event did not affect the relative amount of LTP decay.
(17) Inhibitor activity decayed with time after radiation (2 Gy) with no activity detected at 6 h even though the cells remained in G2 phase, suggesting that either synthesis or activation of additional components is necessary for recovery from G2 arrest.
(18) These results are consistent with the previous observation in HTC cells that the decay rate of ODC activity in the presence of cycloheximide correlated well with the proportion of ODC present as a complex with antizyme, suggesting the ubiquitous role of antizyme in ODC degradation.
(19) The outward current decays exponentially with an early and late phase.
(20) The decay of acid soluble radioactivity was similar in the two groups, although protein synthesis was lowered by vitamin A deficiency.
Masker
Definition:
(n.) One who wears a mask; one who appears in disguise at a masquerade.
(v. t.) To confuse; to stupefy.
Example Sentences:
(1) Finally, three mechanisms are discussed that contribute to the absence of unmasking by masker fluctuations in hearing-impaired listeners.
(2) Detectability of a filtered probe tone (250, 500, or 1000 Hz) was measured in the presence of a narrow-band Gaussian masker centered at the signal frequency.
(3) For fixed delta T (delta T greater than 3 msec), the masking effect may actually increase for the longer, less intense noises despite the fact that, for long maskers, there is less masker energy near the signal in time.
(4) Results indicated that the MLD decreased in magnitude as the interaural phase shift of the masker increased.
(5) Forward masking, as measured behaviorally, is defined as an increase in a signal's detection threshold resulting from a preceding masker.
(6) Thus the overshoot effect was markedly reduced by aspirin because the drug partially counteracted the normally poor detectability for signals presented soon after masker onset.
(7) Masker and signal frequencies were the same as for the first experiment.
(8) The iso-forward masking contour near the threshold of the masking effect across masker frequencies approximates a fiber's frequency threshold curve (FTC).
(9) In part, the small threshold shifts can be attributed to the reduction in response variance following the masker, which is the result of the adaptation of spontaneous activity.
(10) Hence, one cannot predict masked threshold from the acoustic spectra of the maskers used here since they differ from their internal representations.
(11) The data support a spectrum-analyzer model of detection in which multiband filtering of the input smooths the masker energy in each spectral region to approximate the Gaussian case.
(12) Recent investigations of the masking-level difference (MLD) have often involved measurement of the MLD as a function of masker level.
(13) The masker with the largest amplitude fluctuations exhibited greater forward-masking ability than other stimuli; this effect was observed on the high-frequency branch and within the tip region of the tuning curve.
(14) The 20-ms signal was presented at the onset or at the temporal center of the 400-ms masker.
(15) A reaction time paradigm was used to estimate the sensitivity of four subjects to airpuffs without and during continuous vibration (masker) of low (30 Hz) or high (240 Hz) frequency.
(16) The data from all three experiments suggest that threshold signal levels in the presence of interaural differences in masker intensity depend principally on the ear with the higher signal-to-masker ratio at the output of its auditory filter, a finding consistent with the power-spectrum model of masking.
(17) Because maskers that are decorrelated yield small MLDs, the MLD is likewise small at low masker levels.
(18) For large masker separations, r greater than 0.4, no consistent effects of signal phase were observed.
(19) The IMD is dominated by the cubic component (2f1-f2) and arises from the interaction of the probe tone and the simultaneous masker.
(20) Masker duration was 20 or 400 ms; in the latter case, the signal was presented in one of three temporal positions within the masker.