(a.) Concave on both sides; as, biconcave vertebrae.
Example Sentences:
(1) The normal disks were biconcave, whereas the surgically removed disks were deformed and thicker than the normal disks.
(2) The normal red cells were biconcave disks in which chlorpromazine induced inward (negative) curvature: deep cupping (stomatocytosis) and multiple invaginations.
(3) The relationships observed support the following conclusions: (A) the femoral score and the metacarpal index are related to the degree of osteopenia; (B) the biconcavity index reflects the extraskeletal factors that are pathogenic in spinal osteoporosis; (C) a reduced femoral trabecular pattern index is associated with spinal osteoporosis, although this measurement is not related to the degree of osteopenia; and (D) it may be imprudent to diagnose osteoporosis from the presence of lumbar compression fractures.
(4) As well as an increase in the electron density, configurational distortion modified the normal biconcave forms to ameboid structures.
(5) Scanning electron microscopy of the platelets revealed a gradual morphologic change from biconcave flat discs to irregular, crenated forms.
(6) This crenated cell shape was reversed to a biconcave disc or cup-like form by a further treatment with lysophospholipase.
(7) Development of lateral bodies and modeling of the biconcave cores was observed within 30 min, and structurally mature virions were present by 2 hr after the removal of rifampin.
(8) The fossa was almost flat, slightly convex antero-posteriorly and concave medio-laterally; the disc was biconcave and the condyle oval.
(9) Normal biconcave erythrocytes were transformed by the lysolipid lysolecithin (1-alpha-lysophosphatidylcholine, LPC) into spiculated and sphered corpuscles which had a normal viscosity at high shear rates despite their abnormal shape.
(10) The capsid may bend into an open torus, conferring a biconcave disk or kidney-shaped morphology to the virion (largest diameter 120-140 nm) or the capsid may be straight, resulting in a rod-shaped particle (35 X 170 nm).
(11) The vertebral bodies were biconcave, and kyphosis and scoliosis developed.
(12) I designed a biconcave floating contact lens used for trans pars plana vitreous surgery.
(13) Fifteen patients with compression fractures and five with biconcave fractures were studied.
(14) Combining low temperatures for lysis and high temperatures for resealing and sufficient energy supply are advantageous for highest recovery of biconcave discocytes.
(15) The explanations are supported by the resealed ghost shapes observed before and after the treatments; shape recovery from the monoconcave spheroid toward biconcave discoid is observed in most cases concomitantly with improvements of flow characteristics.
(16) The findings demonstrate that A23187 causes a time- and concentration-dependent conversion of biconcave erythrocytes into echinocytes and spheroechinocytes.
(17) A soft, self-adhering, biconcave silicone contact lens is presented.
(18) This results from the asymmetric form (biconcave disc) of these cells.
(19) We find that by reducing the volume, the stable shape can change from a circular biconcave shape as in red blood cells, to elliptical, triangular, square, and other polygonal shapes.
(20) Each vertebra from third thoracic (T3) to fifth lumbar (L5) received a score of "1" if normal, "2" if biconcave and "4" if crushed or fractured.
Biconvex
Definition:
(a.) Convex on both sides; as, a biconvex lens.
Example Sentences:
(1) Studies of the dorsal ocelli of the wasp Paravespula vulgaris (L.) led to the following results: Under a biconvex corneal lens, 150 microns in thickness, about 600 receptor cells are located.
(2) The white disc-like structure in 11 cases was composed of an anterior, stiff, bulgy, biconvex structure combined with a posterior flattened portion that grossly was incorrectly determined to be part of the disc, but that was identified histologically as a posterior disc attachment that had undergone adaptive change characterized by connective tissue hyalinization.
(3) Twenty knees that were resurfaced with a patellar button prosthesis and implanted with conventional surgical technique constituted Group A. Twenty knees that were resurfaced with a new biconvex prosthesis and implanted with specially designed instrumentation constituted Group B.
(4) The dioptric apparatus of each ommatidia includes a biconvex corneal lens and a spherical crystalline cone that is secreted by two cone cells.
(5) Between flattening of kidney and capsular artery or capsule, one may individualize a mass of soft tissue density, convex or biconvex, corresponding to the hematomas.
(6) Epidural hematomas demonstrated a high density and a biconvex, lenticular shape.
(7) The resolution efficiencies of 31 biconvex silicone intraocular lenses, ranging in power from 16.0 to 23.5 diopters, were tested in air and in water to see if a predictable relationship existed as previously reported with polymethylmethacrylate lenses.
(8) Analysis of these medications reveals that the most commonly prescribed combination is the glucocorticoid triamcinolone (unscored white tablets) and the antihistamine chlorpheniramine (coated biconvex orange or red tablets).
(9) With capsular fixated IOLs, the features that have a statistically significant impact on reducing PCO include (1) one-piece, all-polymethylmethacrylate (PMMA) IOL styles, (2) a biconvex or posterior convex optic design, and (3) angulated loops.
(10) Constant ultrasonographic features include a biconvex, echogenic, intracranial mass adjacent to the inner table of the skull.
(11) Flattening of vertebral bodies with biconvex deformity and short tubular bones with irregular epiphyses and metaphyses are the major radiographic features.
(12) In healthy children younger than 5 years of age, the thymus had a quadrilateral shape and biconvex lateral contours.
(13) The exact positioning of the biconvex, one-piece lens in the bag is the prerequisite for good centration and for an optimal result.
(14) In aortic stenosis and idiopathic cardiomyopathy, the septum tends to be biconvex with maximal thickening in its middle third.
(15) Laboratory studies have suggested that one-piece, biconvex designs may reduce or delay posterior capsular opacification and that in-the-bag fixation of the posterior chamber IOL may reduce inflammation.
(16) Asphericities for five lens shapes; the minimum spherical aberration lens and its reverse form, the equi-biconvex lens, the plano-convex lens and its reverse form are determined.
(17) Rat embryos at 9.9 days of gestation, when the neural epithelium is a biconvex plate, and at 10.4 days of gestation, when the cervical neural epithelium has formed the neural tube and when the cephalic neural folds have elevated but not fused, were used.
(18) A linear charged coupled device (CCD) image array sensor and a biconvex lens are used to determine the position of the pupil.
(19) In transverse section the neural ectoderm is biconvex; the cranial mesenchyme cells beneath them are widely separated by extracellular matrix (ECM) and are joined to each other and to the ectodermal basement membrane by fine cytoplasmic processes and strands of ECM material.
(20) A new technique, the frown incision, was developed and a series of 62 eyes with 6 mm and 7 mm incisions for intercapsular phacoemulsification and implantation of a 6 mm or 7 mm one-piece biconvex poly(methyl methacrylate) (PMMA) posterior chamber intraocular lens with single horizontal mattress suture closure was prospectively evaluated for induced astigmatism.