(v. t.) To extinguish; to overwhelm; to make an end of; -- said of flame and fire, of things burning, and figuratively of sensations and emotions; as, to quench flame; to quench a candle; to quench thirst, love, hate, etc.
(v. t.) To cool suddenly, as heated steel, in tempering.
(v. i.) To become extinguished; to go out; to become calm or cool.
Example Sentences:
(1) The extreme quenching of the dioxetane chemiluminescence by both microsomes and phosphatidylcholine, as a model phospholipid, implies that despite the low quantum yield (approx.
(2) The drug is extracted from serum or urine with ethyl acetate, separated by TLC, and determined by fluorescence quenching densitometry.
(3) Formation of a complex between alpha-tocopherol or its analogues in the excited state and fatty acids or their hydroperoxides has been suggested basing on the fluorescence quenching experimental data.
(4) Quenching of intrinsic fluorescence of (Ca2+-Mg2+)-ATPase by acrylamide, performed in the presence of Ca2+, gave evidence for a single class of tryptophan residues with Stern-Volmer constant (KSV) of 10 M-1.
(5) The 23Na double-quantum signal was quenched in both the extracellular and the intracellular compartments with increasing concentration of Li in each compartment, along with an increase in the 23Na T1 both intra- and extracellularly.
(6) Binding increases the fluorescence intensity of Tyr-49 by 130% while the fluorescence of the hormone tyrosine is almost completely quenched.
(7) Addition of 2,6-dimethylbenzoquinone caused quenching of these absorbance changes.
(8) These observations lead to the hypothesis that acidosis quenches fluorescence in distal skin flaps.
(9) The degree of quenching was accurately predicted by a simple relation derived in this paper, as well as a more complex equation previously developed by Tweet, et al.
(10) Subtilin may slightly enter the hydrophobic core as suggested by tryptophan fluorescence quenching and liposome fusion experiments.
(11) Greater than 99% of the polymerization reaction products were quenched by the addition of 2.0 mM ascorbate.
(12) Acoustic probe-based assays can enhance assay and laboratory efficiency through testing for multiple analytes in a single sample or increasing available binding surface area (by using probe and well surfaces simultaneously), and by eliminating quenching.
(13) The second-order rate constants appear to be at least 3 orders of magnitude lower than the second-order constants for quenching of the fluorescent probes; this is taken as a clear indication that ubiquinone diffusion is not the rate-determining step in the quinone-enzyme interaction.
(14) Accessibility to iodide was much lower, as was the rate of quenching by iodide, adding support to the conclusions from acrylamide quenching.
(15) An ATP-dependent, N-ethylmaleimide-inhibitable, 3,3',4',5-tetrachlorosalicylanilide-reversible, and chloride-attenuated quench of bis(1,3-dibutylbarbituric acid-(5] pentamethinoxonol fluorescence was seen, consistent with net transfer of positive charge into the vesicles.
(16) Quenching data indicated that five out of 22 tryptophans in CBH are surface-localized and are available for quenching with both KI and acrylamide, and three other tryptophans are buried and are available only to acrylamide.
(17) Acid quenching of a stiochiometric reaction between Ac(= S)CoA and citrate synthase following the transient quantitatively regenerates Ac(= S)CoA, indicating carbon-carbon bond formation had not yet occurred.
(18) The pulsed laser photolysis products of the charge-transfer quenching reaction were examined.
(19) The highest yield of amino acids with the quench reaction was 9 x 10-7 molecules per erg of input energy.
(20) Tris-washed chloroplast enriched in the photosystem II reaction center species Z+Q- and ZQ- are nearly four times more sensitive to nitrobenzene quenching than those enriched in Z+Q.
Squelch
Definition:
(v. t.) To quell; to crush; to silence or put down.
(n.) A heavy fall, as of something flat; hence, also, a crushing reply.
Example Sentences:
(1) What was shaping a week ago to be the second successive, evenly balanced and see-saw NBA finals between these teams instead proved shockingly one-sided, as Miami were squelched for the third time in six days and lost the best-of-seven series by four games to one.
(2) The effects of the amplitude of the squelch signal and of the degree of smoothing were systematically investigated for experimental and simulated 1-D and 2-D rf echograms.
(3) In Beijing I witnessed recently how the only Chinese demonstration against the war was squelched by police, while a march by foreign residents was tolerated for just 20 minutes.
(4) The ability of the c-Jun protein, the main component of the transcription factor AP1, to interact directly or indirectly with the RNA polymerase II-initiation complex to activate transcription was investigated by in vivo transcription interference ("squelching") experiments.
(5) The GAL-TAF-1 activator was found to self-squelch without affecting basal transcription.
(6) The emerging popularity of the procedure was squelched by the frequent complication of gastrojejunal stomal ulceration.
(7) Zhou established Fengrui in 2007 and the next year took on one of the country’s biggest dairies in a scandal over tainted baby formula that the government had tried to squelch.
(8) Here, we provide evidence that EB1 and R can synergistically activate specific transcription, and that overexpressed, unbound EB1, represses the R-induced transcription ('squelching').
(9) We have to watch for and cultivate and encourage those glimmers of curiosity and possibility, not suppress them, not squelch them,” Obama told the audience on the South Lawn, which included astronauts, scientists and students.
(10) Interestingly, at high concentrations human jun-D displays decreased activity which cannot be explained by a simple self squelching model.
(11) These purified cofactors were found to be required for CTF-1-regulated transcription, and they counteracted squelching by an excess of activator in in vitro reconstitution experiments.
(12) We don’t go around that way when there are big tides,” I was told with unblinking frankness as I squelched up to my hotel reception desk.
(13) When excess v-jun is expressed in the cell, replication is inhibited or 'squelched'.
(14) We suggest that this inhibition, which we call squelching, reflects titration of a transcription factor by the activating region of GAL4.
(15) A similar level of squelching was seen after removal of the up-stream activation sequences from the yeast reporter gene, suggesting that the squelching interactions were with transcription factors needed for the activity of a basal promoter.
(16) Worse yet, some will demand they be violently squelched, as Brazilian soccer great Ronaldo did when he suggested that police crack down on masked vandals: "I think they have to bring down the clubs, get them off the street."
(17) These images are termed according to their algorithms: ZCS, zero crossing counter with squelch; ASS, analytic signal with squelch; ASW, analytic signal with Wiener kernel; UNP, unwrapped phase; and SAS, smoothed analytic signal.
(18) Once, this place may have been a shit-hole, but it was teeming, hopping, crowded" – and we squelch our way past Desolation Row to a little corner of Cairns Street where the resolute people remain.
(19) These findings suggest that saturation of the cellular capacity to mediate an estrogen response and ER-dependent squelching occur at receptor titers well above those encountered in nature.
(20) An incision was made to remove the abscess, but instead of finding pus, massive bleeding ensued whose source could not be located; it was squelched by tampons.