(n.) A binary compound of carbon with some other element or radical, in which the carbon plays the part of a negative; -- formerly termed carburet.
Example Sentences:
(1) The uptake of cobalt by macrophages in the presence of tungsten carbide was found to be increased.
(2) A previous study from this laboratory, using morphological and biochemical (LDH release) parameters, has shown that tungsten carbide-cobalt dust exhibits a greater cytotoxicity toward isolated macrophages than cobalt metal powder alone.
(3) Acceptable finishing procedures for the composite materials tested include silicon carbide disks for accessible areas or 12 fluted finishing burs for more inaccessible areas.
(4) A cross-sectional study of 1,039 tungsten carbide (TC) production workers was carried out.
(5) Experimental measurements have been made of the ultrasonic velocity and attenuation in some simple suspensions of, mainly, silicon carbide in water and in ethylene glycol.
(6) Method 4 comprised a green stone, a carbide finishing bur, and the Vivadent polisher for composite.
(7) It was considered that foreign bodies were composed of carbon steel, steel alloy, and tungsten carbide.
(8) A titanium nitride coating has been deposited on steel and tungsten carbide dental rotary instruments.
(9) On stimulation of the lungs with an inert dust (silicon carbide), the AM count in the BAL and the lung was only slightly increased 8 weeks after intratracheal instillation.
(10) The results showed that the high speed finishing technique by twelve and thirty fluted carbide burs and final polishing with Command Ultrafine Luster Paste produces the smoothest and flatest surface of HERCULITE XR.
(11) Workers in the silicon carbide industry have experienced occupational health diseases, particularly lung disorders such as silicosis.
(12) Finishing with the aid of properly formed diamond stones or tungsten-carbide finishers in the normal speed range 6.
(13) To investigate this, we analyzed pairs of chest radiographs obtained in 1977 and 1984 in 128 silicon carbide plant workers.
(14) For forty years, cases of interstitial pneumonia and bronchial asthma have been described in hard metal workers (i.e., alloys of tungsten carbide and cobalt).
(15) Para-tertiary butylphenol [(PTBP); the Union Carbide Corporation trademark for this chemical is UCAR Butylphenol 4-T Flake] has applications as a raw material in the manufacture of resins and also as an industrial intermediate.
(16) We have previously demonstrated that tungsten carbide-cobalt powder (WC-Co) is more toxic toward murine macrophages in vitro than pure cobalt metal particles and that the cellular uptake of cobalt is enhanced when the metal is present in the form of WC-Co mixture.
(17) Fifty extracted maxillary central incisors were mounted in cups and the facial surfaces of the crowns were polished on 600-grit silicon carbide paper.
(18) The pulpal perforations were treated by partial pulpotomy with a tungsten carbide fissure bur after exposure for 4, 48, or 168 hours in nine animals, and by direct pulp capping after exposure for 4 or 48 hours in the remaining four animals.
(19) There the combination of a preparing diamond cutter with a tungsten carbide finisher proved a success both relating to profiles of enamel bevel after acid etching, small disturbed enamel structure and as to clinical handling.
(20) These observations add further evidence to our previous findings regarding the different biological reactivity of cobalt metal alone or mixed with tungsten carbide.
Polyatomic
Definition:
(a.) Having more than one atom in the molecule; consisting of several atoms.
(a.) Having a valence greater than one.
Example Sentences:
(1) The possibilities are shown of using officinal glycerin as a polyatomic alcohol in the treatment of alcoholism, in particular, alcohol abstinent syndrome.
(2) The results for iron, cobalt, copper, and zinc were corrected for interferences from polyatomic ions by using a blank solution containing the same concentration of sodium, sulfur, chlorine, and calcium as human serum.
(3) The relative binding affinities of various monovalent alkali metal and polyatomic cations for the TTX-receptor site showed that this site displayed cation discrimination properties which were similar to those reported previously for the electrically excitable sodium channel in intact nerve fibers.
(4) For polyatomic anions the predictions agree approximately but not completely with observations.
(5) By using high mass resolution we succeeded in detecting and localizing 99Tc in cell sections by eliminating polyatomic ions that arise from this biological matrix.
(6) The interface atomizes the macromolecule in a microwave discharge and produces simple polyatomic molecules from the elements contained in the analyte by reaction with a scavenger gas.
(7) The topography of the cells is given by the image of the polyatomic ion 26CN-.
(8) These included monoatomic anions Cl- and Br-, which bind to the so-called halorhodopsin binding sites I and II, and polyatomic anions NO3- and ClO4-, which bind to site I only.
(9) The differences in position of the polyatomic anions in the two sequences indicates that the "binding" site is accessible but that transport is limited by steric factors.
(10) The permeability sequence for large polyatomic anions was formate greater than bicarbonate greater than acetate greater than phosphate greater than propionate for GABAR channels; phosphate and propionate were not measurably permeant in GlyR channels.
(11) Relative proportions of monoatomic and polyatomic emission vary in epoxy, gelatin and tissue.
(12) At present the most important limitation of this method is mass overlap by polyatomic species for some elements of interest (e.g., Cr, Mn, and V).
(13) However, we find that two Schiff base frequencies characterize halorhodopsin upon binding of the polyatomic anions.
(14) Thus, large polyatomic ions can cause secondary-ion desorption even at very low velocity.
(15) The additional ionization yield through the nonmetastable Penning processes reaches a maximum abruptly at very low partial pressure of polyatomic admixtures (alkanes), decreasing steadily with higher admixture partial pressure.