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Mostrando ítems 11-20 de 72
Physico-chemical properties of MTA and a novel experimental cement
(2005-07-01)
Aim: To evaluate the release of calcium ions, pH and conductivity of a new experimental dental cement (EC) and to compare them with those of mineral trioxide aggregate (MTA-Angelus). Methodology: Five samples of each cement ...
Hydrogen-Ion Potential of Antibiotics According to the Environment Factors Temperature and Luminosity
(Escola de Enfermagem de Ribeirão Preto / Universidade de São Paulo, 2010-04-01)
The objective of this experimental study was to measure the pH of antibiotics administered by intravenous infusion - ceftriaxone sodium, vancomycin hydrochloride, metrodinazole, penicillin G potassium and amikacin sulfate ...
Preconcentration and determination of mercury(II) at a chemically modified electrode containing 3-(2-thioimidazolyl)propyl silica gel
(2005-11-01)
A mercury-sensitive chemically modified graphite paste electrode was constructed by incorporating modified silica gel into a conventional graphite paste electrode. The functional group attached to the (3-chloropropyl) ...
Determination of cadmium in river water samples by flame AAS after on-line preconcentration in mini-column packed with 2-aminothiazole-modified silica gel
(2004-07-01)
A rapid and sensitive method was developed to determine trace levels of Cd2+ ions in an aqueous medium by flame atomic absorption spectrometry, using on-line preconcentration in a mini-column packed with 100 mg of ...
Atividade da beta-glucuronidase no suco gástrico e mucosa gástrica de ratos submetidos a carência proteica
(1979-12-01)
An experiment was performed in order to evaluate the beta-glucuronidase activity in gastric juice and gastric mucosa of rats submitted to a protein-free diet. A group of 36 young adult male Wistar rats was fed a protein-free ...
Purification and characterization of two β-glucosidases from the thermophilic fungus Thermoascus aurantiacus
(2002-12-01)
β-Glucosidase from the fungus Thermoascus aurantiacus grown on semi-solid fermentation medium (using ground corncob as substrate) was partially purified in 5 steps-ultrafiltration, ethanol precipitation, gel filtration and ...
Mechanisms of action of fluoride for caries control
(2011-06-01)
Fluoride was introduced into dentistry over 70 years ago, and it is now recognized as the main factor responsible for the dramatic decline in caries prevalence that has been observed worldwide. However, excessive fluoride ...
Production of saccharogenic and dextrinogenic amylases by Rhizomucor pusillus A 13.36
(2005-12-01)
A newly-isolated thermophilic strain of the zygomycete fungus Rhizomucor pusillus 13.36 produced highly active dextrinogenic and saccharogenic enzymes. Cassava pulp was a good alternative substrate for amylase production. ...
Effect of calcium hydroxide on pH changes of the external medium after intracoronal bleaching
(2011-05-01)
Aim: This in vitro study evaluated the effect of calcium hydroxide on pH changes of the external medium after intracoronal bleaching. Materials and methods: A total of 50 extracted human premolars were prepared and filled ...