carbamide


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Related to carbamide: Carbamide peroxide

carbamide

[′kär·bə‚mīd]
(organic chemistry)
References in periodicals archive ?
###Ethyl carbamide [5]###1966.10###9.0###1962.0###0.21
Although bleaching with 22% carbamide peroxide reduces the bond strength, it does not reduce the bond strength below the minimum required clinical level of 6-8Mpa.
In the present study, there were lower mean SBS for the CP group, corroborating the findings of previous studies (4, 25) that demonstrated that 10% carbamide peroxide is dissociated into 3% hydrogen peroxide and 7% urea, and afterwards, hydrogen peroxide dissociates into oxygen radicals and water.
According to a study, a 10 percent carbamide peroxide bleaching gel containing potassium nitrate and fluoride produced less tooth sensitivity than a regular whitening system without potassium nitrate and fluoride during a 2-week at-home bleaching treatment.
Different chemical agents were used to bleach discolored teeth such as chlorinated lime, oxalic acid, acetic acid, chlorine compounds and solutions, sodium peroxide, sodium hypochlorite, different concentrations of hydrogen peroxide, carbamide peroxide and sodium perborate.
Obviously in soils with and without SRB, the addition of carbamide made the soil redox potential decrease dramatically.
Otherwise, as was performed on the third patient, at-home whitening treatment containing 10% carbamide peroxide may also be effective to completely remove stains from the enamel opacity.
The bleaching agents used were home bleaching (Beaming White Home Whitening System) consisted of 36% Carbamide Peroxide.
The construction of a carbamide plant is complete by 94.8 per cent, the plant`s director Khayal Jafarov said at the second Socar International Caspian and Central Asia Downstream Forum Trading, Logistics, Refining, Petrochemicals.
Polycondensation of AFP took place under following conditions: the temperature is 20, 30, 60[degrees]C; the molar ratio of carbamide to formaldehyde is 1:1.25; the polycondensation duration is 2 hours; the concentration of calcium chloride (considering on calcium ions)--[C.sub.0]([Ca.sup.2+]) = 0; 22.5; 40; 45; 70; 90 g/l (0; 0.565; 1.0; 1.125; 1.75; 2.25 mol/l); the mass ratio of CaC[O.sub.3]:AFP = 1:1.
Generally hydrogen peroxide and carbamide peroxide are practiced to lighten the dark teeth, and to treat the cases of mottled enamel, dental flourosis, tetracycline stained teeth as well as for other external and internal stains7,8.
Bleaching agent used were Carbamide peroxide 10% {Opalescence} and Carbamide peroxide 21% (d-tech) (4)