(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.
Geode
Definition:
(n.) A nodule of stone, containing a cavity, lined with crystals or mineral matter.
(n.) The cavity in such a nodule.
Example Sentences:
(1) Although the 2 groups were similar with respect to the frequency and severity of joint space narrowing, subchondral sclerosis, and geodes, osteophytes were less common in the patients with diabetes (P = 0.044), and spurring, when present, tended to be "marked" less often in the diabetic patients than in the controls.
(2) Subchondral cyst formation (geode) is a not uncommon manifestation of rheumatoid arthritis which may at times impede correct radiologic interpretation.
(3) In the appendicular skeleton abnormalities include: well-defined lytic areas (geodes), pathologic fractures, marginal erosions, and periarticular soft tissue swelling.
(4) Voluminous geodes affecting one or more of the bone of the wrist were present in 20 percent of the patients with ACC and in 5 percent of the controls.
(5) The term geode, rather than cyst or pseudocyst, may be a more appropriate decription of these lesions.
(6) Tolypocladium geodes strain NC50 was transformed by different integrating vectors bearing both a synthetic gene encoding human lysozyme (HLz) and the Sh ble phleomycin resistance marker, either in separate expression cassettes or in transcriptional or translational fusion configurations.
(7) In contrast to most of the commonly described techniques requiring prior preparation of protoplasts or spheroplasts, this method leads to high efficiency transformation of T. geodes conidiospores following moderate lytic enzyme treatment.
(8) Their precise natur remains hypothetical, in the absence of histological criteria, but it is possible at least for the bordered geodes, that they represent tiny centres of osteonecrosis.
(9) In 2 cases no classification could be assigned to isolated or predominant geodes of the femoral head in spite of anatomic examination.
(10) A "total geode score" was also obtained by scoring, separately, the geodes.
(11) The surgical treatment indicated is voiding and packing to a maximum the geodes possibly correcting the former increased pressure discordance.
(12) Radiological examinations showed 40 abnormal findings in 23 patients (28%): erosive arthropathies of fingers (4), and multiple geodes of the carpus (8), of the humeral head (7) or of the hip (9).
(13) Giant pseudocysts (geodes) are uncommon and are characteristically associated with extensive joint destruction.
(14) Those outbreaks with specific evolution bring about either an extension of the socket or the appearance of a new geode.
(15) Assesment was carried out on Xrays of both hands, search being made for erosions, geodes, and joint narrowing, the severity being graduated from 0 to 4, according to data from the international Atlas of Radiology.
(16) Only 20 patients had severely erosive disease, which manifested as giant geodes in 8 cases and as main en lorgnette deformity in one case.
(17) All transformants from E. coli and most from T. geodes displayed beta Gal activity.
(18) Geodes should be studied more by their severity than by their frequency; this is high in the controls, which diminishes their specificity (45 for the wrist, 62 for the first carpo-metacarpal, and 75 for the first metacarpo-phalangeal joint).
(19) Geodes (3.7%), destructive lesions (3.9%), sclerosis (4%) and articular lesions (5.1%) are second in frequency.
(20) Southern hybridization revealed multiple integration sites of plasmid DNA into the T. geodes nuclear DNA despite the absence of homology between the transforming DNA and the recipient genome.