(v. t.) The act of hindering, or the state of being hindered.
(v. t.) That which hinders; an impediment.
Example Sentences:
(1) The increased hindrance to diffusion of the probing molecules caused by the added solutes is considered as good evidence that the probing molecules diffuse by way of pores filled with water.6.
(2) 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.
(3) The relative reactivities of three o-substituted phenols can be explained in terms of steric hindrance which is minimal for a single o-substituent.
(4) The lower affinity of C8-substituted 7-methyl-1,3-dipropylxanthines can be explained quantitatively with steric hindrance, which C8-substituents experience from the 7-methyl group in these conformations.
(5) A comparison of the antioxidant activities of eight 1,4-naphthoquinones indicated that methyl substitution of C-2, lack of steric hindrance at C-3 or C-5, and (in the case of weak acids) a relatively high pKa are favorable structural features associated with strong antioxidant activity.
(6) However, no steric hindrance can be seen between subunits when the subunits in carbonmonoxy Hb are substituted with the corresponding subunits in deoxy Hb.
(7) This suggests that the one-carbon binding site can accomodate two one-carbon groups simultaneously without serious steric hindrance.
(8) Inter-molecular spread of the conformational change among the molecules of PVX protein was demonstrated in DAS-ELISA, when capture mAb inhibited binding of detecting mAb in the absence of steric hindrance.
(9) 46% of the fatal accidents were caused by crashing against hindrances.
(10) Partial hindrance was observed for the third antibody mAb delta 22.
(11) Intraocular horseradish peroxidase (HRP) accumulated in severed optic axons but was transported with no obvious hindrance in spared axons alongside the lesion.
(12) The molecular areas at which the phase transition occurs under the various experimental conditions, together with a parallel analysis of the hydration states and related molecular areas of the DPPC molecules in multilayers, strongly suggest that the steric hindrance associated with the hydration water of the polar head of DPPC molecules in the monolayer is responsible for the drastic decrease in diffusion coefficient in the liquid-condensed phase.
(13) The spondylodiscites were no hindrance for dorsal lordosing osteotomies and can be treated successfully by means of this static correction and the immobilisation.
(14) At the experiments with the isolated rat hearts, prepared by Langendorff, the anti-arrhythmic dose-effects of the water-soluble antioxidant fenozan from the class of steric-hindrance phenols were studied at condition of regional ischemia and reperfusion, as well as its action on the coronary flow.
(15) Taken together, these results suggest that tonin bound to alpha 1-macroglobulin keeps the active site intact and that inhibition of the enzyme activity is due to a steric hindrance.
(16) Because these inhibitors bind preferentially at the extracellular surface of the transporter, their effects must result from a conformational change rather than from steric hindrance.
(17) We propose that incA, in addition to sequestration, can also restrain replication by causing steric hindrance to the origin function.
(18) Vascular hindrance in muscle, but not hindlimb, was less during nerve stimulation in anemia than at normal Hct.
(19) Intense steric hindrance by introducing an enormously bulky group or complete elimination of the 17 beta-hydroxy group rather decreased the anti-androgenic activity.
(20) Their expertise led to this mess, and would be a hindrance, not a help, in cleaning it up.
Pullback
Definition:
(n.) That which holds back, or causes to recede; a drawback; a hindrance.
(n.) The iron hook fixed to a casement to pull it shut, or to hold it party open at a fixed point.
Example Sentences:
(1) A group of economists told the Wall Street Journal that is exactly what is happening : They blame our lackluster recovery this year on a pullback in spending and investment by US companies, which are afraid that the fallout from a fiscal cliff could compromise their ability to find funding or function normally.
(2) Although an uncommon lesion, when pulmonary stenosis is considered, pulmonary artery and right ventricular pressures should be assessed simultaneously on two-catheter pullback to appreciate the precise location of pulmonary-right ventricular pressure gradients.
(3) Those who have grown pessimistic about a deal with Mahmoud Abbas, the Palestinian president, can nevertheless imagine reaching a bargain with a coalition of Arab states, one that would include an Israeli pullback from occupied Palestinian territory.
(4) Correlation (r = 0.95) between continuous-wave Doppler estimates and catheter pullback pressure gradients across the conduits was excellent.
(5) An extra 3,100 peacekeeping troops will be sent to Congo, the UN Security Council said today, even though rebels said they remained committed to a pullback from the front lines.
(6) Echocardiography confirmed the position of the septostomy catheter before pullback.
(7) Validation studies showed that sphincter imaging based on a stepwise pullback of a catheter with four or eight radial side holes is superior to a rapid motorized pullback.
(8) At specified time points between 1 and 41 days after the initial balloon pullback injury, the iliac arteries were analyzed by angiographic, morphometric, and immunocytochemical techniques.
(9) Other approaches used to determine the mean transaortic valve gradient were less accurate: simultaneous LV-FA (R = 0.991); aligned LV-FA (R = 0.974); averaged simultaneous and aligned LV-FA (R = 0.981); and nonsimultaneous LV-aorta pullback (R = 0.953).
(10) A 22-year-old-man with intermittent obstruction of the subclavian vein at the thoracic outlet was evaluated by a pullback venous pressure gradient measurement and phlebography.
(11) By traversing the inflow tract of the left ventricle on pullback from the left atrium to the aorta, this method served to separate definitively true hypertrophic subaortic stenosis from cavity obliteration.
(12) To examine if any obstruction to LV outflow was caused by the micromanometer, cardiac performance was assessed during pullback from the ventricle to the aorta.
(13) It is determined by computer analysis of continuous-pressure measurements during constant speed pullback of a radially oriented 4- 6- or 8-channel manometry catheter across the LES.
(14) The ceasefire and weapons pullback is to be monitored by the Organisation for Security and Cooperation in Europe (OSCE).
(15) In 18 patients with AS, the pressure gradient was quantitated from (1) simultaneous left ventricular and ascending aortic pressures (LV-AO), (2) nonsimultaneous LV-AO pullback, (3) LV and femoral arterial (FA) pressures unadjusted for the time delay of the FA tracing (LV-FA unadjusted), and (4) LV-FA adjusted for time delay.
(16) For Lebanon watchers both here and in Washington, the statements have contributed to a long-running belief that an opposition win – even one in which Hezbollah held only a handful of non-security-related cabinet positions – would trigger a broad US pullback from the country, especially as far as funding the Lebanese army is concerned.
(17) We conclude from these preclinical studies that retrograde atherectomy with the Pullback Atherectomy Catheter is a feasible means of performing definitive atherectomy.
(18) IMF director José Viñals said: "Faltering confidence and policy uncertainty have led to a pullback of cross-border private capital flows from the periphery – quite an extraordinary phenomenon within a currency union."
(19) He zips into the box, reaches the byline, and attempts to find Lavezzi with a pullback.
(20) • Despite Thursday's pullback from Salahedin by the FSA, analysts suggest the military balance may be changing .