(n.) The regular form which a substance tends to assume in solidifying, through the inherent power of cohesive attraction. It is bounded by plane surfaces, symmetrically arranged, and each species of crystal has fixed axial ratios. See Crystallization.
(n.) The material of quartz, in crystallization transparent or nearly so, and either colorless or slightly tinged with gray, or the like; -- called also rock crystal. Ornamental vessels are made of it. Cf. Smoky quartz, Pebble; also Brazilian pebble, under Brazilian.
(n.) A species of glass, more perfect in its composition and manufacture than common glass, and often cut into ornamental forms. See Flint glass.
(n.) The glass over the dial of a watch case.
(n.) Anything resembling crystal, as clear water, etc.
(1) Such a signal must be due to a small ferromagnetic crystal formed when the nerve is subjected to pressure, such as that due to mechanical injury.
(2) A comprehensive review of the roentgenographic features of calcium pyrophosphate crystal deposition disease (pseudogout) is presented.
(3) CW Nd:YAG light transmitted by fiber optic cable and sapphire crystal was applied transsclerally to the ciliary body of pigmented and albino rabbits.
(4) The crystal structure of the biological stain, "acridine orange," has been determined.
(5) Urinalysis revealed a low pH, increased ketones and bilirubin excretion, dark yellowish change in color, the appearance of "leaflet-shaped" crystals and increased red blood cells and epithelial cells in the urinary sediment, increased water intake, decreased specific gravity and decreased sodium, potassium and chloride in the urine.
(6) Early in the regression process, cholesterol esters are reduced at least partly by hydrolysis to yield cholesterol, some of which may crystallize and inhibit rapid regression.
(7) Here we determine the position of bound ADP diffused into the recA crystal.
(8) The virus material in these crystals had been subjected to treatment with EDTA at pH 8.0 before crystallization at pH 6.5.
(9) Results obtained show that chlorophyll is more active than other inhibitors studied and suggest a higher surface adsorption intensity on the primary sources of the crystal surface.
(10) The "Mg(2+)-Sarkosyl crystals" (M band) technique distinguishes between membrane-bound and free intracellular DNA.
(11) The molecular structure of the hexagonal crystal form of porcine pepsin (EC 3.4.23.1), an aspartic proteinase from the gastric mucosa, has been determined by molecular replacement using the fungal enzyme, penicillopepsin (EC 3.4.23.6), as the search model.
(12) In vitro experiments show that these macromolecules are able to interact with specific faces of different crystals, influencing both nucleation and crystal growth.
(13) 2 Each of the drugs significantly increased leucocyte cyclic AMP content within 3 h of the injection of crystals.
(14) For Kevin Phillips, just like Wilfried Zaha, this might have been his final act as a Crystal Palace player.
(15) In ancillary studies, multiple cycles of direct dissolution of UCB crystals revealed a progressive decrease in aqueous solubility of UCB as fine crystals were removed; this effect was minimal in CHCl3.
(16) Six dogs were instrumented with electromagnetic flow probes and subendocardial ultrasonic crystals.
(17) The crystallization of the lipase was successfully carried out.
(18) The values of the energy level distributions in crystals obtained from the measurements and analysis reported here are compared with those obtained by a different method for the same protein complex in frozen solution.
(19) The crystal structure of proteolytically modified human ACT has been solved at 2.7-A resolution (Baumann et al., 1991).
(20) These observations support our hypothesis that calcium pyrophosphate dihydrate crystal deposition in joints is regulated by the physical chemical gel state of the connective tissue matrix.
Striation
Definition:
(n.) The quality or condition of being striated.
(n.) A stria; as, the striations on a shell.
Example Sentences:
(1) We show that over a limited range of high spatial frequencies this noise takes on a striated appearance, with the striations running perpendicular to the true fringe orientation.
(2) Cytoplasmic striations seen by light microscopy and trilamellar inclusions seen by electron microscopy were found in ballooned adrenocortical cells.
(3) In addition the bare central backbone showed transverse striations.
(4) These vacuoles contained one or several typical collagen fibrils and had either an electron-lucent matrix or contained an electron-dense material obscuring the fibrillar outlines and cross-striations.
(5) A new optical-electronic method has been developed to detect striation spacing of single muscle fibers.
(6) Fungiform papillae which had a round depression on the top were distributed sporadically among the filiform papillae, and contained columnar CTC with several plane striations running longitudinally along the lateral surface.
(7) Often juxtaposing sets of striations are not in correct register with respect to one another.
(8) In the Colobinae striations are oriented in a predominantly mesiodistal direction.
(9) Superficial corneal epithelial striations described as fibrillary lines have been documented as a common finding in normal and keratoconic eyes.
(10) A characteristic 67 nm transverse striation produced by the intermixing of tropocollagen and collagen types 1 and 3 is observed.
(11) These masses were classified into three broad categories: centrally necrotic masses with a large predominantly liquefactive center and higher density periphery (29); multilocular, septated masses with distinct linear bands or striations (21); and miscellaneous masses (9).
(12) These transition cells possessed apical granules of variable size as well as prominent basal striations.
(13) Amino acid composition, cross striation banding as observed using electron microscopy, cyanogen bromide peptide patterns in disc electrophoresis gels and resistance of the disulfide regions to pepsin digestion indicated a close similarity to previously described insoluble type III collagen, which was solubilized by limited pepsin digestion.
(14) Rabbits were trained to discriminate between vertical and horizontal striations.
(15) These structures were labelled with a selective antibody and showed regular periodic striation with repeats of approximately 40 nm.
(16) Sometimes, these seemed to be connected with the wall of the intracristal space by fine, electron-dense cross-striations.
(17) In the angiograms, the highly vascular region displays a certain striation which is due to the presence of muscle fiber bundles running between the pathologic vessels.
(18) However, in the clinical setting of acute cholecystitis, the presence of striations suggests gangrenous changes in the gallbladder.
(19) A- and I-band striation positions have been obtained, three-dimensionally reconstructed, and statistically analyzed from the volumes of resting isolated heart cells.
(20) Striation of the cuticle cells was normal, with wearing of their free borders (PL, SEM; fig.