(n.) A flat, circular plate; as, a disk of metal or paper.
(n.) The circular figure of a celestial body, as seen projected of the heavens.
(n.) A circular structure either in plants or animals; as, a blood disk; germinal disk, etc.
(n.) The whole surface of a leaf.
(n.) The central part of a radiate compound flower, as in sunflower.
(n.) A part of the receptacle enlarged or expanded under, or around, or even on top of, the pistil.
(n.) The anterior surface or oral area of coelenterate animals, as of sea anemones.
(n.) The lower side of the body of some invertebrates, especially when used for locomotion, when it is often called a creeping disk.
(n.) In owls, the space around the eyes.
Example Sentences:
(1) These findings suggest that clonidine transdermal disks lower blood pressure in hypertensive patients, but produce local skin lesions and general side effects.
(2) These observations suggest that the liver secretes disk-shaped lipid bilayer particles which represent both the nascent form of high density lipoproteins and preferred substrate for lecithin-cholesterol acyltransferase.
(3) Opsin becomes incorporated into the disk membrane by a process of membrane expansion and fusion to form the flattened disks of the outer segment.
(4) Somatic and functional antigens of Dictyocaulus filaria were comparatively studied by means of disk electrophoresis.
(5) We performed a prospective study on 68 eyes of 68 patients to compare the vertical cup-disk ratio obtained with the video-ophthalmograph to that obtained with manual analysis of black-and-white stereoscopic photographs.
(6) Visible light activates a large guanosine cyclic 3',5'-phosphate (cGMP)- and phosphodiesterase (PDE)-dependent infrared light-scattering change in suspensions of photoreceptor disk membranes.
(7) Three disks of different sizes (10, 25, and 45 mm in diameter) were attached to the edge of the baresthesiometer, and pressures of 1, 3 and 5 kg were applied to the 10 mm disk, and 1, 3, 5, and 7 kg to the other disks.
(8) The hemolytic characteristics of 14 different polydimethyl-siloxane materials were studied, using a rotating disk device to shear whole human blood for 6000 sec.
(9) These optic disk anomalies occurred bilaterally with some inter- and intra-individual variable expressivity.
(10) This is the first reported case, to the best of my knowledge, of disk neovascularization occurring after intravenously injected, crushed, unfiltered, methylphenidate HCl tablets.
(11) We have investigated the relationship between rhodopsin photochemical function and the retinal rod outer segment (ROS) disk membrane lipid composition using flash photolysis techniques.
(12) We found that the Na-Ca exchanger is distributed throughout all membranes in contact with the extracellular space, including the sarcolemma, the transverse tubules (T-tubules), and the intercalated disks.
(13) The minimal inhibitory concentration of netilmicin determined by the agar dilution method was correlated with the disk diffusion zone of inhibition against 322 clinical isolates.
(14) The initiation step consisting of the binding of RNA with the 36S disk of protein was easily accomplished.
(15) The state of the intervertebral disks, intervertebral joints and cerebrospinal canal in degenerative vertebral diseases was assessed.
(16) It is concluded that although a rapid automated system for antibiotic sensitivity testing is desirable, the conventional disk agar diffusion method is easier to perform, more reliable, and a less expensive procedure for antibiotic sensitivity determination.
(17) The diagnostic accuracy of CT in cases of lumbar disk prolapse was investigated on the basis of a group of 158 of our own patients who were divided into three separate groups.
(18) Disk position was assessed inaccurately in either plane in patients with severe degenerative joint disease.
(19) Based on the morphology and magnetic anisotropy of the rod outer segment, the major phospholipid peak is attributed to the flat part of the disk membranes while the phospholipids of the plasma membrane are thought to contribute only to the minor peak.
(20) QC range for H. Influenzae ATCC 49247 were established using multiple HTM agar and broth base lots, three disk lots for each drug, and a number of test replicates consistent with the National Committee for Clinical Laboratory Standards M23-T guideline.
Obturator
Definition:
(n.) That which closes or stops an opening.
(n.) An apparatus designed to close an unnatural opening, as a fissure of the palate.
(a.) Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve.
Example Sentences:
(1) In this study, a technique is described by which large obturators can be retained with an acrylic resin head plate.
(2) (a) unaltered tooth, (b) access preparation, (c) instrumentation, (d) obturation, and (e) MOD cavity preparation; or 2.
(3) Results revealed there was no statistically significant difference among the four obturation techniques.
(4) The percentage of metastasis to the external iliac, internal iliac and obturator lymph nodes was 55%, 83% and 82%, respectively.
(5) To produce a chronic moderate hydronephrosis in dog, a method of partial ureteral occlusion using a specially designed polypropylene obturator was developed.
(6) These are related to the insertions and fascial investments of the iliopsoas, pyriformis, and obturator internus muscles and the ensheathed penetrations of the superior gluteal arteries.
(7) The ease and rapidity of the technique saves time for both the patient and the maxillofacial prosthodontist by introducing the open obturator prosthesis at the earliest opportunity.
(8) The close anatomical relation between the posterior portion of the muscle and the obturator internus suggests that the latter may play a role in supporting the weak posterior portion of the levator ani, especially during straining positions associated with lateral rotation at both hips.
(9) They are determined primarily by (a) the pulpal response of an immature tooth to trauma, and (b) the mechanical difficulties encountered when attempts are made to obturate the root canal of a tooth with a widely patent apical foramen.
(10) We modified the second stage (mouthpiece) of a standard scuba regulator to permit intermittent positive pressure ventilation using either a mask or an esophageal obturator airway.
(11) This can now be achieved by using a mechanical stapler to obturate temporarily the distal end of the colonic segment bearing a conventional lateral colostomy, then performing an extra-mucosal anastomosis to re-establish continuity.
(12) A dye penetration study was done to compare apical leakage among three groups of extracted teeth obturated with a lateral condensation technique.
(13) Forty-five extracted anterior teeth were obturated with gutta-percha, the apical 3 mm of the roots were resected, and 2-mm-deep retrograde preparations were prepared.
(14) The position of the arthroscope and blunt obturator are then reversed so that the arthroscope views the posterolateral compartment.
(15) Obturator bypass grafts were used in 10 patients, iliac-femoral grafts in three, axillopopliteal in one, and right external iliac crossover to left popliteal in one patient.
(16) Two obturation techniques were used with each sealer; the single gutta-percha point technique, and lateral condensation with multiple gutta-percha points.
(17) To compare, in vitro, the seal of Ti-Flex and GP cone obturations, to verify the adaptation of the Ti-Flex cone inside the obturated canal and to evaluate the density of the sealer material, eighty-two canals of freshly extracted teeth were manually prepared and obturated with corresponding Ti-Flex cones and with single GP cones.
(18) The given approach permitted maximum use of the preserved muscular elements of the obturator apparatus.
(19) The short gracilis myocutaneous flap derives its blood supply from terminal branches of the obturator artery, and the vascular pedicle derived from the medial femoral circumflex artery is sacrificed.
(20) The absence of diastolic murmur and prevailing symptoms of right ventricular insufficiency are distinctive features of obturator thrombosis rather than atrial thrombosis of the prosthesis.