(v. t.) To disturb; to agitate; to vex; to trouble; to disquiet.
(v. t.) To disorder; to confuse.
Example Sentences:
(1) These membrane perturbation effects not observed with bleomycin-iron in the presence of a hydroxyl radical scavenger, dimethyl thiourea, or a chelating agent, desferrioxamine, were correlated with the ability of the complex to generate highly reactive oxygen species.
(2) Ultraviolet difference spectrophotometry indicates that the inactivated enzyme retains its capacity for binding the nucleotide substrates whereas the spectral perturbation characteristic of 3-phosphoglycerate binding is abolished in the modified enzyme.
(3) It is suggested that laboratory experiments should be performed on perturbed systems only if simulations have shown that the methods of data analysis will be satisfactorily powerful and accurate.
(4) Thresholds were measured for detecting perturbations in a regular lattice of dots by modulating local dot density, local dot luminance, or some combination of the two.
(5) It is shown that when a constant current is applied such that a stable equilibrium and rhythmic firing are present, the following predictions are inherent in the HH system of equations: (a) Small instantaneous voltage perturbations to the axon given at points along its firing spike result in phase resetting curves (when new phase versus old phase is plotted) with an average slope of 1.
(6) Lower lip perturbation duration was manipulated to yield two different load conditions.
(7) The role of the Golgi complex in the post-translational oligosaccharide maturation of alpha-amylase was explored by use of the carboxylic ionophore, monensin (10(-7)M), a known perturbant of the structure and function of the Golgi complex.
(8) The importance of the ionic interaction due to the formation of the salt bridge between the Asp-27 and the pteridine ring in Escherichia coli dihydrofolate reductase-methotrexate complex has been studied by using the free-energy perturbation method.
(9) Presence of the monosynaptic reflex during platform perturbations at normal latencies suggests that balance problems in children with Down syndrome do not result from hypotonia, which researchers have defined as decreased segmental motoneuron pool excitability and pathology of stretch reflex mechanisms, but rather result from defects within higher level postural mechanisms.
(10) We have perturbed the dynamics of the nuclear lamins by means of cell fusion between mitotic and interphase cells and have studied redistribution of lamins in fused cells as a function of extracellular pH levels.
(11) In the coagulating gland, this compensatory response involved the proliferation of many cells which, in the absence of cytotoxic perturbation, would be non-proliferatie (Q cells).
(12) The effect of initial perturbation of the thrombus by a guide wire appears to be less important than the thrombus disruption and accelerated thrombolysis caused by the pulsatile delivery system.
(13) As before, subjects were instructed to either oppose the perturbation (Predictable Oppose) or relax the forearm muscles (Predictable Let-Go).
(14) Bivalent cations (Ca2+, UO2(2+) or Zn2+) in the subphase at pH 5.6 significantly modified the behaviour of mixed monolayers of fusogenic lipids with phospholipids; there was a parallel perturbing effect of fusogenic lipids on interactions between monolayers of phospholipids and bivalent cations.
(15) In particular, nitration of Tyr-51 provoked a structural perturbation in the globular region.
(16) Altering the biophysical characteristics of cell membranes by diet and membrane perturbing agents markedly influences thermosensitivity of cells.
(17) Paraphilias (PAs) and non-paraphilic sexual addictions (NPSAs) may be behaviors that share a common perturbation of central serotonin neuroregulation as a component of their pathophysiology.
(18) 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.
(19) This high incidence of HER2 gene amplification with accompanying overexpression in non-invasive breast tumors suggests that perturbations of the HER2 oncogene are among the earliest and most common genetic lesions in human breast cancer.
(20) Hypophysectomy was selected as a model system for perturbing testicular cell types, since the cytological sequelae of this treatment post-hypophysectomy in the rat are well documented in the literature.
Turbulent
Definition:
(a.) Disturbed; agitated; tumultuous; roused to violent commotion; as, the turbulent ocean.
(a.) Disposed to insubordination and disorder; restless; unquiet; refractory; as, turbulent spirits.
(a.) Producing commotion; disturbing; exciting.
Example Sentences:
(1) It facilitated the acquisition of quantitative velocity information with standard Doppler ultrasound techniques by identifying areas of high velocity or turbulent flow and was invaluable in the assessment of anomalous pulmonary venous drainage occurring either as an isolated anomaly or in conjunction with complex intracardiac lesions.
(2) The visualized turbulent flow was consistent with a ventriculoseptal defect but also appeared to extend posteriorly into the left atrium in a direct line with the septal communication.
(3) A Bernoulli 'free-fall' numerical model is shown to reproduce the principal features of such casting, with some evidence of viscosity limitation of the turbulent flow at long casting lengths.
(4) When there is turbulence in the vein lumen the volume of reflux becomes excessive and causes so much adjustment that constrictor tone is abolished.
(5) The Kremlin has so far refrained from dealing with mounting anger against people from Russia's turbulent North Caucasus region, as well as migrant workers from central Asia, which has grown as the country's oil-fuelled economic boom has given way to the hardship of the global financial crisis.
(6) Shearer has long been expected to take the reins at St James' Park at some point but it is something of a surprise that he has chosen to do so amid such turbulence and uncertainty over the club's future.
(7) It is a standard declaration of public loyalty to the Saudi royal family as it marks the end of a turbulent year since King Salman came to the throne.
(8) Doppler and color flow Doppler examinations demonstrated nonpulsatile and turbulent blood flow within the lesion, consistent with a diagnosis of umbilical artery aneurysm.
(9) On the other hand, the device is more sensitive to the turbulences induced by the subject's own breathing.
(10) In 1 patient the clinical diagnosis of arteriovenous fistulae was confirmed by color Doppler which demonstrated a continuous turbulent flow within the femoral vein.
(11) We conclude that flow disturbance or turbulence is a major factor in the development of venous intimal-medial hyperplasia in arteriovenous loop grafts.
(12) "The external environment provides a testing backdrop for these results, and all our industries face some degree of turbulence," Scardino said.
(13) He is totally comfortable around Wall Street and bankers.” Trump’s effort to characterize himself as without obligation to the financial sector despite his long record of loans and debt restructuring during episodic turbulence in his business career, including the bankruptcy of Trump Hotels & Casino Resorts in 2004, is likely to raise eyebrows.
(14) The Brontes lived in stirring times and in a turbulent region.
(15) With the sample volume in the right ventricle a continuous turbulent flow was observed.
(16) Pathologic regurgitant jets were seen as high-velocity, systolic-retrograde turbulent flow across the prosthesis.
(17) Because maximum expiratory flow-volume rates in normal subjects are dependent on gas density, the resistance between alveoli and the point at which dynamic compression begins (R(us)) is mostly due to convective acceleration and turbulence.
(18) Clinical applications of this index suggest the possibility of using it further as a detection tool for diseases that generate turbulent noises.
(19) The usual high pressure injections also result in turbulent flow conditions.
(20) Steering the debate through these turbulent waters with more than his usual sense of mischief was David Dimbleby .