(n.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.
Example Sentences:
(1) The crystallographic orientation of the calcite also appears to be independent of these fibrils.
(2) The calcium carbonates-calcite, aragonite, and vaterite-constitute most of the remainder of the calculi.
(3) Crystallographic analysis of stones from patients with nutritional pancreatitis (NP), as well as alcoholic pancreatitis (AP), revealed that the main constituent was calcite (CaCO3).
(4) Calcite was present in all stones, vaterite in 12%, and a central amorphous material in 30%.
(5) X-ray diffraction showed that calcite (CaCO3) was the major crystalline constituent of the calcareous deposits.
(6) When the doped glasses have been immersed in a physiological solution (199 medium), a film of calcite forms on the glass surface and this modification is related to the type of doping agent used, decisive for close linking between metal supports and the glass.
(7) We suggest that precipitation of calcite in the pancreatic duct occurs as the primary event in the formation of pancreatic calculi and that it may continue until the duct is completely occluded.
(8) 5-7): calcite and quartz are the principal components of the sinters, additional diffuse apatite lines appear in bone samples.
(9) These features are characteristic of sea urchin (Echinoderm) spines which are composed of ornately formed calcite crystals covered by an epithelium.
(10) Its absence in all analyzed invertebrate tissues (including calcitic, aragonitic, and apatitic mineral phases) indicates that matrix protein-bound gamma-carboxyglutamic acid is not obligatory for the calcification process in the invertebrates.
(11) Quantitatively, phosphate is by far the most important inhibitor of calcite precipitation present in saliva, suggesting that inhibition of calcite precipitation by the macromolecules may be of secondary significance.
(12) Plates of calcite (CaCO3) were implanted in rabbit tibiae, and their biocompatibility and bonding ability to bone were studied.
(13) Subsequent increase in diameter of the rod involves the radial development of irregular columns of calcite which arise from the peripheral nodules.
(14) The phenomenon of dissolution and recrystallisation in situ of the calcite can be a trap because it can be a reservoir for micro-organisms.
(15) Synechococcus strain GL24 was isolated from Fayetteville Green Lake, New York, where it has a demonstrated role in the formation of calcitic minerals.
(16) Pancreatic stones are observed in both humans and cattle, and are approximately 95% CaCO3 (calcite) in both species.
(17) Skeletal walls of more than one mineralogy have the magnesium-rich layer (calcite) surrounding the living chamber and the strontium-rich layer (aragonite) on the outside.
(18) Here we report on the ability of a soil bacterium to synthesize calcite in a calcium-stressed environment.
(19) Formation of inner protein nidus in the form of a cobweb is the first stage, then calcite is deposited on this fibrous network as tiny crystals.
(20) The biocompatibility of mammal bone with aragonite and calcite skeletons of aquatic invertebrates (Corals, Molluscs) led us, after animal experimentation, to implant in humans artificial dental roots derived from such invertebrates.
Coralloid
Definition:
(a.) Having the form of coral; branching like coral.
Example Sentences:
(1) Myxococcus coralloides D produced cell-bound deoxyribonucleases (DNases) during the exponential phase of growth in liquid medium.
(2) A strain of Myxococcus coralloides producing an antibiotic capable of inhibiting growth of Gram-positive bacteria was isolated.
(3) Myxococcus coralloides D was lysogenic for a defective prophage.
(4) DNA was prepared from cyanobacteria freshly isolated from coralloid roots of natural populations of five cycad species: Ceratozamia mexicana mexicana (Mexico), C. mexicana robusta (Mexico), Dioon spinulosum (Mexico), Zamia furfuraceae (Mexico) and Z. skinneri (Costa Rica).
(5) Mature arbuscules exhibited a coralloid morphology which resulted in a considerable increase in the surface area of the endophyte exposed within the host cells.
(6) Myxococcus fulvus, Myxococcus coralloides and Archangium gephyra occurred in all biotops studied.
(7) Two methods for the isolation of an antibiotic produced by Myxococcus coralloides have been developed: the chloroform extraction method and the charcoal adsorption method.
(8) Starch isolated from the fungi Hericium ramosum and Hericium coralloides differs from that of higher plants in that it consists only of short-chain amylose molecules (32 to 45 glucose units long).
(9) On the other hand, a similar comparison of cyanobacteria freshly collected from a single Encephalartos altensteinii coralloid root and from three independently subcultured isolates from the same coralloid root revealed that these were likely to be one and the same organism.
(10) The effect of inorganic phosphate concentrations on antibiotic and extracellular protein production by Myxococcus coralloides D have been examined.
(11) Either coralloid or bulbous rhizoids form in plant material, but only the latter in axenic culture.
(12) Acid and alkaline phosphatase of Myxococcus coralloides were examined during vegetative growth in a liquid medium.
(13) In forest soils Myxococcus coralloides and Myxococcus fulvus occur frequently, in grassland soils Myxococcus coralloides and Archangium gephyra are predominating.
(14) 5S rRNA sequences were determined for the myxobacteria Cystobacter fuscus, Myxococcus coralloides, Sorangium cellulosum, and Nannocystis exedens and for the radioresistant bacteria Deinococcus radiodurans and Deinococcus radiophilus.
(15) We found msDNA in other myxobacteria, including Myxococcus coralloides, Cystobacter violaceus, Cystobacter ferrugineus (Cbfe17), Nannocystis exedens, and nine independently isolated strains of M. xanthus.
(16) A strain of Myxococcus coralloides was isolated which produced an antibiotic active against Gram-positive bacteria and also against Neisseria sp at high levels of antibiotic.
(17) Thus, a wide range of Nostoc strains appear to associate with the coralloid roots of cycads.