(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.
Efflorescence
Definition:
(n.) Flowering, or state of flowering; the blooming of flowers; blowth.
(n.) A redness of the skin; eruption, as in rash, measles, smallpox, scarlatina, etc.
(n.) The formation of the whitish powder or crust on the surface of efflorescing bodies, as salts, etc.
(n.) The powder or crust thus formed.
Example Sentences:
(1) Herpetiform efflorescences appeared over the head and trunk shortly before death.
(2) Clinico-biological examination of 154 patients with psoriasis resulted in data showing high activity of endo- and exopeptidases in efflorescences of that dermatosis.
(3) These nodules were painful when pressure was applied The clinical appearance of the efflorescence was most similar to that of glomangiomas.
(4) In these 18 the efflorescence was also examined histologically.
(5) As zinc sulphate has efflorescent properties, the effect of humidity on the coated tablets was studied and physical stability tests were carried out.
(6) The classical combination of symptoms consists of urticariel efflorescences, bleeding of skin and lining tissue and arthralgies [8, 19].
(7) The history revealed that, when about 40 years of age, a coarse skin-fold and yellowish-white xanthoma-like efflorescences had been noted around her umbilicus, the inguinal regions and axillae.
(8) We have observed 5 such cases and, in this report, describe 2 cases in which the sudden efflorescence of many new warts was used as a sign to predict accurately the onset of involution and subsequent regression of all flat warts.
(9) Polymorphous light eruption (PLE) is a common disorder characterized by a delayed, abnormal response to ultraviolet (UV) radiation, with a varied morphology of itching efflorescences on sun-exposed areas of the skin.
(10) New insights into the pathophysiology of acne show that the most important therapeutic principle is suppression of the propionibacteria in the pilosebaceous duct since these bacteria have a key role in the genesis of the comedo and of inflammatory acne efflorescences.
(11) After appearance of a leutic maculo-papulous rash systemic application of Penicillin lead to a quick cessation of the cutaneous efflorescences as well as of the uveitis.
(12) This leads us to study the volatilisation of codeine stored in safety boxes suggest adding the mention "slightly efflorescent" to the usual characteristics of codeine found in the monography of the French Pharmacopoea as mentionned by LEBEAU and JANOT.
(13) Our investigation showed that the reverse is the case: the thickness of the epidermis in the psoriasis efflorescences is significantly greater than in healthy skin nearby in the same patient.
(14) "In the early 2000s there was this incredible efflorescence of anger and excitement .
(15) All the remaining changes, particularly the mutagenic and immunosuppressive effects as well as papular efflorescences on the skin, arise only as secondary phenomena.
(16) Characteristic efflorescence emerged during pregnancy; clinical manifestations disappeared 1-2 weeks after the disease resolution.
(17) The time of efflorescence was different in each pregnancy.
(18) Confluent vesicles flattened within 24 to 48 hours and no further efflorescences were seen.
(19) Both araU derivatives applied as 0.1% eyedrops suppressed the development of keratitis as monitored by the reduced number of herpes efflorescences.
(20) In the first days of this therapy, a characteristic local reaction of the L.p. lesions could be observed; first an edematous swelling appeared, followed by scaling and regression of efflorescences.