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  • apical constriction
  • Apical constriction in polarized epithelia is the best studied of these phenomena, and involves the conversion of columnar cells into wedge-shaped cells. (biologists.org)
  • We show that the apical constriction of lens epithelial cells that accompanies invagination of the lens placode is dependent on Shroom3, a molecule previously associated with apical constriction during morphogenesis of the neural plate. (biologists.org)
  • We show that Shroom3 is required for the apical localization of F-actin and myosin II, both crucial components of the contractile complexes required for apical constriction, and for the apical localization of Vasp, a Mena family protein with F-actin anti-capping function that is also required for morphogenesis. (biologists.org)
  • This shape change, known generally as apical constriction (AC), is a characteristic shared with the prospective mesodermal cells of a gastrulating Drosophila embryo, as well as with the neuroepithelial cells that contribute to the hinge-point region during neural tube closure ( Lecuit and Lenne, 2007 ). (biologists.org)
  • congenital
  • The purpose of this study was to clarify the spectrum of congenital constriction band syndrome (CBS) and associated anomalies and mortality in Finland. (ovid.com)
  • Register-based data were analyzed for children with congenital constriction bands in upper and lower extremities as a part of an ongoing study on 419 upper limb defects and 171 lower limb defects occurring among 753,342 births in Finland during 1993 to 2005. (ovid.com)
  • However, in 21 cases (30%) the child had other anomalies associated with constriction rings: pes equinovarus in 8/21, cleft palate in 5/21, congenital heart defect in 6/21, and other anomalies in 14/21. (ovid.com)
  • rats
  • To investigate a potential relation between the 2 mechanisms, we studied coronary arteries of Sprague-Dawley rats for individual myogenic constriction compared with EDHF-mediated dilation of the same artery. (ahajournals.org)
  • In this study, we examined the cardiovascular function of anesthetized rats before, during and after being constricted by boas ( Boa constrictor ) to examine the effect of constriction on the prey's circulatory function. (biologists.org)
  • By the end of constriction (mean 6.5±1 min), rat PBP dropped 2.9-fold, f H dropped 3.9-fold, systemic perfusion pressure (SPP=PBP−CVP) dropped 5.7-fold, and 91% of rats (10 of 11) had evidence of cardiac electrical dysfunction. (biologists.org)
  • Blood drawn immediately after constriction revealed that, relative to baseline, rats were hyperkalemic (serum potassium levels nearly doubled) and acidotic (blood pH dropped from 7.4 to 7.0). (biologists.org)
  • contractile
  • 6,7 On the intraluminal side of the blood vessel lies the endothelium, an important producer of mediators such as endothelin-1 and contractile prostaglandins, but also prostacyclin, nitric oxide (NO), and endothelium-derived hyperpolarizing factor (EDHF), all of which act on underlying smooth muscle cells causing constriction or dilation to regulate vasomotor tone. (ahajournals.org)
  • known
  • In S. pombe , the AMR undergoes multiple phases known as assembly, maturation, constriction, and disassembly ( 4 ), with open questions in each of these four stages. (pnas.org)
  • The transfer of charge through constrictions generates fluctuations of the current known as shot noise. (dissertations.se)
  • Flow
  • The present investigation of the flow pattern at constrictions with two to seven openings is a continuation of the earlier study. (usgs.gov)
  • It is shown that the relations developed for the constriction with a single opening are applicable to each opening of a multiple-opening constriction once the boundaries of the separate flow channels have been established. (usgs.gov)
  • You flow to the a venturi constriction that is 5 m wide. (physicsforums.com)
  • Search
  • 2 A literature search found brief details of one other case of bilateral field constriction apparently induced by vigabatrin. (bmj.com)
  • blood
  • Increased myogenic constriction in several forms of hypertension appears to be associated with more depolarized resting membrane potential and smooth muscle calcium levels also when studied at comparable/normotensive blood pressure levels. (ahajournals.org)
  • Constriction to bradykinin varied directly with the O 2 tension and was greatest when the Po 2 was approximately that of umbilical arterial blood during the transition from the fetal to the neonatal period. (ahajournals.org)
  • effect
  • For comparison, in mesenteric arteries (at 70 mm Hg) low myogenic constriction (2±1%) was associated with high EDHF-mediated dilation (93±2%), and pretreatment with NS1619 had no effect. (ahajournals.org)
  • Share
  • Myogenic constriction as well as EDHF-mediated dilation may share common signaling mechanisms, and both may control K Ca channel activity to set arterial tone. (ahajournals.org)
  • device
  • An implantable constriction device for forming a restricted stoma opening in the stomach or esophagus of a patient comprises an elongate composite structure adapted to constrict the stomach or esophagus of the patient. (google.com)
  • 2 . An implantable constriction device according to claim 1 , wherein said property improving means comprises a coating on said base material at least along a side of said elongate composite structure that is intended to contact the stomach or esophagus, said coating having better aggressive body fluid resistant properties than said base material. (google.com)
  • 3 . An implantable constriction device according to claim 2 , wherein said coating is selected from the group consisting of a Teflon™, Parylene™, and a biocompatible metal coating. (google.com)
  • 5 . An implantable constriction device according to claim 2 , wherein said property improving means comprises a core of a viscoelastic material covered with said self-supporting base material. (google.com)
  • 6 . An implantable constriction device according to claim 5 , wherein hard silicone constitutes said base material. (google.com)
  • 7 . An implantable constriction device according to claim 5 , wherein said viscoelastic material is selected from the group consisting of silicone gel, cellulose gel, and collagen gel. (google.com)
  • 8 . An implantable constriction device according to claim 2 , wherein said base material forms an inflatable tubing. (google.com)
  • 9 . An implantable constriction device according to claim 8 , wherein said tubing has an inner surface defining the interior of said tubing, and said coating covers said inner surface. (google.com)
  • 13 . An implantable constriction device according to claim 8 , wherein said base material forms two coaxial tubular layers and said property improving means comprises a tubular intermediate layer of a viscoelastic material located between said coaxial tubular layers. (google.com)
  • wide
  • Boas ( Boa constrictor Linnaeus 1758) are members of the early alethinophidian group Booidea ( Scanlon and Lee, 2011 ) that employ a relatively fixed constriction behavior pattern on a wide variety of prey ( Mehta and Burghardt, 2008 ). (biologists.org)
  • rather
  • McLees (1928) and Hardy (1994) argued otherwise and suggested that the cause of death in prey during constriction was circulatory arrest rather than suffocation. (biologists.org)
  • Research
  • Further research on my part hasn't yielded anything else, so I'll keep both "constriction" and "necking" in mind for the time being. (proz.com)
  • generally
  • Current medications for asthma primarily are aimed at reducing bronchial constriction by expanding airway passages and generally do not address the problem of fluid build up resulting from vascular leakage. (thefreedictionary.com)
  • development
  • Laboratory experiments and the analysis were directed toward the development of methods for (a) computing discharge through multiple-opening constrictions, (b) apportioning a given total discharge among the several openings, and (c) predicting the backwater caused by the constriction. (usgs.gov)
  • quantum
  • Normally, researchers have trouble understanding how electron systems move through constrictions because of the multiple classical and quantum forces acting on these particles. (nanowerk.com)
  • Such temporal changes have been observed in normal quantum point contacts and are likely to appear in superconducting constrictions not yet realized. (dissertations.se)
  • case
  • One reported case of unilateral visual field constriction was ascribed to an immune mediated anterior ischaemic optic neuropathy. (bmj.com)
  • common
  • These three cases have the common feature of symptomatic constriction of the visual field two to three years after starting vigabatrin treatment. (bmj.com)
  • channels
  • Activation of K Ca channels with NS1619 reduces myogenic constriction and profoundly increases EDHF-mediated dilation, specifically in coronary arteries, suggesting a potential therapeutic impact to reduce coronary risk in hypertension. (ahajournals.org)