(n.) An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.
(n.) The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
Example Sentences:
(1) Both apertures were repaired with great caution using individual sutures without resection of the hernial sac.
(2) By moving an electronic pen over a digitizing tablet, the subject could explore a line drawing stored in memory; on the display screen a portion of the drawing appeared to move behind a stationary aperture, in concert with the movement of the pen.
(3) The procedure consists of a Kirschner wire used as the means of traction on the remaining soft tissue of the lower lip, using the upper teeth or pyriform aperture bone as remote fixed points for tissue traction.
(4) The calibrated aperture in the bottom of each well is small enough to retain fluid contents by surface tension during monolayer growth, but also permits fluid to enter the wells when transfer plates are lowered into receptacles containing washing buffer or test sera.
(5) Acute toxicity consisted primarily of pain within the AA aperture (74%), pain outside the aperture (33%), and bladder spasm (26%) or systemic stress (25%).
(6) Latex particles, including BCR Certified Reference Material CRM 166a, have important applications for checking linearity and for calibrating aperture-impedance instruments used to determine red-cell volumes.
(7) The distance between the apertures on the screen as well as the subject's distance from the screen served as experimental parameters.
(8) When the highly crystalline core contents are suitably oriented to transmit their Bragg reflections through the objective aperture, regular fringes separated by 2-9.5 A have been visualized.
(9) Aperture size was modulated during flight on some trials in an attempt to test between these possibilities, but the results were inconclusive.
(10) When examined with the 3 mm aperture, the average resolving power of the IOLs was 81% of the diffraction limit; when examined with the 4 mm aperture, the average resolving power was 67% of the diffraction limit.
(11) Its principle consists in repairing the tissue defect resulting from the excision of the lower lip by the additional surgical removal of one or two soft tissue triangles from the region of the nasolabial fold and in achieving primarily, by means of horizontal relieving incisions at the base of the lip defect, an extension of the mouth aperture.
(12) Temporal fluctuations of stomatal aperture are important to water use efficiency.
(13) Specific microscope components and objectives are used, and the numerical apertures are adjusted such that light diffraction colors are produced to allow differentiation of the various biological entities and their habitat materials.
(14) Topographical corneal thickness changes were monitored in 10 subjects who each wore a hydrogel contact lens with a large central aperture ("donut" lens) for 6 hours.
(15) The theory is based on a three-dimensional model and the electromagnetic field is assumed to be generated by a prescribed electric field along a ring-shaped aperture.
(16) Quantitative analysis of an area 27 microns in diameter, or a total analysed volume of 1.1 microns3, was performed by using a mechanical aperture in the ion optical system.
(17) We evaluated both low- and high-power lenses and varied the input aperture size between 1, 3, and 5 mm.
(18) Subjects were asked to match the speeds of two moving random-dot patterns seen through circular apertures.
(19) However, our experience has shown us that in certain cases, there are some possibilities of aperture if we feel ourself free enough with our medical identity and if we keep silent as long as the patient is not able to hear us.
(20) The estimated doses to the third, fourth, fifth, and sixth cranial nerves was calculated at a saggital plane 13 to 15 mm from the pituitary by using computer-drawn dosimetry charts for the respective aperture size.
Cleft
Definition:
(imp.) of Cleave
(p. p.) of Cleave
() imp. & p. p. from Cleave.
(a.) Divided; split; partly divided or split.
(a.) Incised nearly to the midrib; as, a cleft leaf.
(n.) A space or opening made by splitting; a crack; a crevice; as, the cleft of a rock.
(n.) A piece made by splitting; as, a cleft of wood.
(n.) A disease in horses; a crack on the band of the pastern.
Example Sentences:
(1) Intraepidermal clefting starts at the junction between the basal and epidermal layers, and later involves all of the levels of the stratum spinosum.
(2) Closure of both cleft spaces by orthodontic means was achieved in 20 of the 21 patients in the first group, and in 14 of the 20 patients in the second group.
(3) In the absence of prostigmine, increasing the concentration of ACh in the synaptic cleft did not change the time constant for decay of end-plate currents.
(4) Both types of oral cleft, cleft palate (CP) and cleft lip with or without CP (CLP), segregate in these families together with lower lip pits or fistulae in an autosomal dominant mode with high penetrance estimated to be K = .89 and .99 by different methods.
(5) Three different structures have been observed among the binding proteins: unliganded 'open cleft', liganded 'open cleft', and liganded 'closed cleft'.
(6) Retrognathia or retrusion of the maxilla and mid-face is present in about one-third of treated cleft palate patients.
(7) At S-L clefts, paranodal-nodal regions, and Schwann cell nuclei, the axonal areas were smaller and the NF densities were higher than at compact myelinated regions.
(8) Cleft palate was found in 98.1% of fetuses in the positive control group and none of them in the negative control group.
(9) Recent reports have indicated the usefulness of nuclear grooves (clefts or notches) as an additional criterion for the diagnosis of papillary thyroid carcinoma in fine needle aspirates; most of these studies were carried out on alcohol-fixed material stained with the Papanicolaou stain or with hematoxylin and eosin, which yield good nuclear details.
(10) The question of how the contraction of adjacent endothelial cells might widen the intercellular clefts and thus regulate permeability is discussed.
(11) An examination of 9720 Zagreb school children, 6-13 years of age, revealed submucous cleft palate (SMCP) in 5 and cleft uvula in 232.
(12) These factors include narrowing of septal arteries and the artery to the atrioventricular node, preservation of fetal anatomy with dispersion in the atrioventricular node and His bundle, fibrosis of the sinus node, clefts in the septum, multiple atrioventricular pathways and massive myocardial infarction.
(13) Although maternal ingestion of antiepileptic drugs is strongly suspected of causing congenital defects, particularly oral clefts, the effect of epilepsy itself or a combined effect of drug intake and epilepsy have not been excluded as etiological factors.
(14) To clarify the mechanism by which retinoid causes cleft palate, we investigated the effect of retinoic acid (RA) on proliferation activity and glycosaminoglycan (GAG) synthesis in mouse fetuses palatal mesenchymal (MFPM) cells.
(15) The blood lymphocytes were small with scanty cytoplasm, densely condensed nuclear chromatin, and deep clefts originating in sharp angles from the nuclear surface.
(16) The familial association of epilepsy and cleft lip with or without cleft palate (CL (P)) is analyzed assuming both entities share common genetic predisposing factors.
(17) In the following, there will be indicated the approved techniques and methods of suturing the cleft palate and a new method will be discussed related to the reciprocal Z-type plastic operation.
(18) Fifty per cent of the children with clefts of the palate and lip had deviated nasal septum producing nasal obstruction.
(19) A family is reported of 500 facial cleft index cases, attendees for plastic surgery review at hospitals in northern England.
(20) An infant with a complete unilateral cleft of the lip and palate underwent maxillary expansion treatment using an oral orthopedic appliance.