(n.) A space contained between the circumferences of two circles, one within the other.
(n.) The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it.
(n.) Ring-shaped structures or markings, found in, or upon, various animals.
Example Sentences:
(1) Multiple determination of size, shape, and diameter of the left atrium were made during the control state and under conditions of varied ventricular outflow resistance in intact anesthetized dogs with markers chronically attached to the mitral annulus and the valve cusps.
(2) It is concluded that most annulus vacuums are a degenerative phenomenon at the attachment of the annulus to bone.
(3) A 29-mm Medtronic mitral valve was secured in the mitral position with a fixed number of ten pledgeted sutures in each annulus.
(4) Intervertebral disc proteoglycans (PGs) were radiolabelled in vivo (with [35SO4(2-)], 24 hours and 60 days prior to euthanasia, when lumbar discs were dissected into nucleus pulposus (NP) and annulus fibrosus (AF).
(5) To date, 3-dimensional studies have demonstrated that the mitral valve is saddle-shaped in systole, so that apparent superior leaflet displacement in the mediolateral 4-chamber view, often seen in otherwise normal individuals, lies entirely within the bounds defined by the mitral annulus and occurs without leaflet distortion or actual displacement above the entire mitral valve.
(6) The mean MAS was nearly twice that of 80 normal specimens (4.9 vs 2.5 mm), the range of MAS was increased from normal (0.11 vs 0.7 mm) and the mean diameter of the aortic annulus was decreased compared with the normal specimens, data that will be of interest to echo- and angiocardiographers in the clinical description of DSS, and to the surgeon who must resect these lesions.
(7) Echocardiography allowed preoperative classification of MI in 4 groups: Group 1 (n = 46) with prolapse of the posterior leaflet; Group 2 (n = 4) with prolapse of the anterior leaflet; Group 3 (n = 8) with prolapse of both mitral leaflets; Group 4 (n = 2) with abnormalities of the mitral annulus alone.
(8) Ten patients with roentgenographically demonstrable mitral annulus calcification (MAC) were found to have distinctive echocardiographic patterns.
(9) Pathologic features include focal and diffuse calcification and ossification in the anterior longitudinal ligament, paraspinal connective tissue, and annulus fibrosis, degeneration in the peripheral annulus fibrosis fibers, L-T-, and Y-shaped anterolateral extensions of fibrous tissue, hypervascularity, chronic inflammatory cellular infiltration, and periosteal new bone formation on the anterior surface of the vertebral bodies.
(10) Echocardiography and subsequently computed tomography showed a mass in the posterior mitral annulus causing incompetence of the valve.
(11) The valve gradient was significantly reduced (47%) from a mean (SD) of 72 (31) to 37 (23) mm Hg with no short term change in cardiac index after dilatation with a balloon with a mean (SD) diameter that was 118 (10.8)% of the valve annulus.
(12) Preoperatively there was a disproportionate increase in left coronary artery and annulus size during systole.
(13) This paper describes the histology and distribution of keratin patches and postulates a mechanism for their formation, based upon the movement of the superficial layer of corneocytes towards the annulus.
(14) Potentially damaging tensile stresses in the annulus fibrosus are directly related to the hydrostatic pressure in the centre of an intervertebral disc: the design and development of a miniature strain gauge pressure transducer is described for measuring such pressures.
(15) Replicas of freeze-fractured collagen fibrils of peripheral and central parts of the annulus fibrosus of bovine intervertebral discs show microfibrils which run either arranged in parallel or in a helix with an inclination-angle ranging from 4 degrees to 8 degrees.
(16) In normal subjects, the left ventricular (LV) epicardial apex swung up to the base only a few millimeters, and the mitral annulus ring moved about 14 mm as mean value toward the apex during systole.
(17) A method is described that allows intact removal of a prosthetic valve without damage to the annulus.
(18) In the annular form, only the annulus, and in the peripheral type only the peripheral connections of the valve are found in both ventricles.
(19) These results suggested that early mitral flow studied in an apical four chamber view is variably skewed both at the leaflet tips and at the annulus.
(20) In the presence of centre illumination, stimulation of the surround with an annulus caused a depolarization and a net decrease in conductance, and the reversal potential of the light-evoked response was shifted in a positive direction.
Ring
Definition:
(v. t.) To cause to sound, especially by striking, as a metallic body; as, to ring a bell.
(v. t.) To make (a sound), as by ringing a bell; to sound.
(v. t.) To repeat often, loudly, or earnestly.
(v. i.) To sound, as a bell or other sonorous body, particularly a metallic one.
(v. i.) To practice making music with bells.
(v. i.) To sound loud; to resound; to be filled with a ringing or reverberating sound.
(v. i.) To continue to sound or vibrate; to resound.
(v. i.) To be filled with report or talk; as, the whole town rings with his fame.
(n.) A sound; especially, the sound of vibrating metals; as, the ring of a bell.
(n.) Any loud sound; the sound of numerous voices; a sound continued, repeated, or reverberated.
(n.) A chime, or set of bells harmonically tuned.
(n.) A circle, or a circular line, or anything in the form of a circular line or hoop.
(n.) Specifically, a circular ornament of gold or other precious material worn on the finger, or attached to the ear, the nose, or some other part of the person; as, a wedding ring.
(n.) A circular area in which races are or run or other sports are performed; an arena.
(n.) An inclosed space in which pugilists fight; hence, figuratively, prize fighting.
(n.) A circular group of persons.
(n.) The plane figure included between the circumferences of two concentric circles.
(n.) The solid generated by the revolution of a circle, or other figure, about an exterior straight line (as an axis) lying in the same plane as the circle or other figure.
(n.) An instrument, formerly used for taking the sun's altitude, consisting of a brass ring suspended by a swivel, with a hole at one side through which a solar ray entering indicated the altitude on the graduated inner surface opposite.
(n.) An elastic band partly or wholly encircling the spore cases of ferns. See Illust. of Sporangium.
(n.) A clique; an exclusive combination of persons for a selfish purpose, as to control the market, distribute offices, obtain contracts, etc.
(v. t.) To surround with a ring, or as with a ring; to encircle.
(v. t.) To make a ring around by cutting away the bark; to girdle; as, to ring branches or roots.
(v. t.) To fit with a ring or with rings, as the fingers, or a swine's snout.
(v. i.) To rise in the air spirally.
Example Sentences:
(1) The Tyr side chain had two conformations of comparable energy, one over the ring between the Gln and Asn side chains, and the other with the Tyr side chain away from the ring.
(2) Sterile, pruritic papules and papulopustules that formed annular rings developed on the back of a 58-year-old woman.
(3) The teeth were embedded in phenolic rings with acrylic resin.
(4) Surgical removal was avoided without complications by detaching it with a ring stripper.
(5) The Labour MP urged David Cameron to guarantee that officers who give evidence over the alleged paedophile ring in Westminster will not be prosecuted.
(6) These results coupled with previous studies support activation of benz[j]aceanthrylene via both 2 and cyclopenta ring epoxidation.
(7) TK1 showed the most restricted substrate specificity but tolerated 3'-modifications of the sugar ring and some 5-substitutions of the pyrimidine ring.
(8) Endothelium-dependent relaxations to acetylcholine and endothelium-independent relaxations to nitric oxide were observed in rings from both strains during contraction with endothelin.
(9) Aortic rings from the rabbit were similarly potently antagonized by the protein kinase C inhibitors, however, K(+)-induced contractions were also equally sensitive to these agents in both rat and rabbit tissues.
(10) The intracellular distribution and interaction of 19S ring-type particles from D. melanogaster have been analysed.
(11) Rings of isolated coronary and femoral arteries (without endothelium) were suspended for isometric tension recording in organ chambers filled with modified Krebs-Ringer bicarbonate solution.
(12) In all cases Richter's hernia was at the internal inguinal ring.
(13) Seventy-five hands showed normal distal latency, in which cases, however, the SNCV of the ring finger was always outside the normal range, while the SNCVs of the thumb, index and middle fingers were abnormal in 64%, 80% and 92% of cases respectively.
(14) The cells are predominantly monopolar, tightly packed, and are flattened at the outer border of the ring.
(15) Defects in the posterior one-half of the trachea, up to 5 rings long, were repaired, with minimal stenosis.
(16) A new analog of salmon calcitonin (N alpha-propionyl Di-Ala1,7,des-Leu19 sCT; RG-12851; here termed CTR), which lacks the ring structure of native calcitonin, was tested for biological activity in several in vitro and in vivo assay systems.
(17) The chemical shift changes observed on the binding of trimethoprim to dihydrofolate reductase are interpreted in terms of the ring-current shift contributions from the two aromatic rings of trimethoprim and from that of phenylalanine-30.
(18) Three strains of fluorescent pseudomonads (IS-1, IS-2, and IS-3) isolated from potato underground stems with roots showed in vitro antibiosis against 30 strains of the ring rot bacterium Clavibacter michiganensis subsp.
(19) Both adiphenine.HCl and proadifen.HCl form more stable complexes, suggesting that hydrogen bonding to the carbonyl oxygen by the hydroxyl-group on the rim of the CD ring could be an important contributor to the complexation.
(20) Serial sections from over a hundred such structures show that these are tubular structures and that the 'test-tube and ring-shaped' forms described in the literature are no more than profiles one expects to see when a tubular structure is sectioned.