(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.
Lens
Definition:
(n.) A piece of glass, or other transparent substance, ground with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure.
Example Sentences:
(1) These results demonstrate that increased availability of galactose, a high-affinity substrate for the enzyme, leads to increased aldose reductase messenger RNA, which suggests a role for aldose reductase in sugar metabolism in the lens.
(2) Based on several previous studies, which demonstrated that sorbitol accumulation in human red blood cells (RBCs) was a function of ambient glucose concentrations, either in vitro or in vivo, our investigations were conducted to determine if RBC sorbitol accumulation would correlate with sorbitol accumulation in lens and nerve tissue of diabetic rats; the effect of sorbinil in reducing sorbitol levels in lens and nerve tissue of diabetic rats would be reflected by changes in RBC sorbitol; and sorbinil would reduce RBC sorbitol in diabetic man.
(3) The significance of the differences in these two patterns of actin is discussed in terms of differences in the accommodative ability and static lens shape in these two animals.
(4) The epithelium of Brunner's gland stained intensely with Ricinus communis agglutinin-I (RCA-I), succinylated-WGA (S-WGA) and wheat-germ agglutinin (WGA), moderately with Bandeirea simplicifolia agglutinin-I (BS-I), Concanavalia ensiformis agglutinin (Con A) peanut agglutinin (PNA) and Ulex europaeus agglutinin-I (UEA-I) and occasionally with Dolichos biflorus agglutinin (DBA), Lens culinaris agglutinin (LCA) and soybean agglutinin (SBA).
(5) That is, he believes, to look at massively difficult, interlocking problems through too narrow a lens.
(6) The advantages of the incision through the pars plana ciliaris are (1) easier approach to the vitreous cavity, (2) preservation of the crystalline lens and an intact iris, and (3) circumvention of the corneal and chamber angle complications sometimes associated with the transcorneal approach.
(7) The third patient was using an extended-wear soft contact lens for correction of residual myopia.
(8) The cellularity depends on the type of the lens and the material of the lens and on the clinical picture of the disease.
(9) Although lens haemagglutinins were detected in 6 out of 7 rabbits, in only 3 of the 6 animals did the titre reach a maximum of 1:640.
(10) Dioptric aniseikonia was calculated between 1 month and 24 months after surgery (with Gruber's and Huber's computer program) on the basis of most recently obtained values (bulb axis length, depth of the anterior chamber, lens thickness, necessary refraction), and compared with subjective measurements taken with the phase difference haploscope.
(11) We propose that a channel with these properties could contribute to maintenance of lens transparency and fluid balance.
(12) Although the lens did not alter stereopsis, it did produce severe color discrimination losses for normal and dichromatic subjects.
(13) The general efficacy of this intraocular lens compared with other anterior chamber lenses was not addressed in this study.
(14) However, the monkey lens low molecular weight proteins differ from the human low molecular weight proteins in charge as well as molecular weight determined by SDS-PAGE.
(15) Fifty-five myopic naval personnel with no previous contact lens experience were put through a three-week study using these contact lenses.
(16) A Stryker turning frame was used during surgical removal of a posterior displaced lens.
(17) The biocompatibility and fixation of a new silicone intraocular lens was evaluated in the cat eye.
(18) Both organisms have previously been found to be sequestered in the posterior lens capsule by histological and microbiological examination of excised capsular specimens.
(19) Previous experiments had demonstrated that the receptors for the lectins soybean agglutinin (SBA), wheat germ agglutinin, concanavalin A and Lens culinaris agglutinin all were relatively uniformly distributed on both myoblasts and myotubes, and that SBA receptors were capable of rapid redistribution on myotubes but not myoblasts at 4 degrees C (Sawyer & Akeson, 1983).
(20) The relative permittivity and conductivity of rabbit eye lens were measured in the frequency domain between 2 and 18 GHz at temperatures of 37 and 20 degrees C. An analysis of the data suggested that a significant proportion of the bulk water in nuclear and cortical lens tissue may behave differently to pure water.