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Calcium hydroxide root canal sealers: Evaluation of pH, calcium ion concentration and conductivity
(1997-12-01)
The calcium hydroxide ionization of four root canal sealers (Sealapex, CRCS, Sealer 26, and Apexit) was studied by measuring conductivity and pH and by conducting atomic absorption spectrophotometry. Samples 6 mm in diameter ...
Presence of calcium in oocytes of the diplopod Rhinocricus padbergi Verhoeff (Spirobolida, Rhinocricidae)
(Japan Soc Histochem Cytochem, 2004-01-01)
In diplopods, the presence of calcium-containing structures seems to be a common finding in some species, with its formation being similar to that observed for other intracellular mineralization systems. In the present ...
Effects of elevated calcium on motor and exploratory activities of rats
(Associação Brasileira de Divulgação Científica (ABRADIC), 2002-04-01)
The effects of serum and brain calcium concentration on rat behavior were tested by maintaining animals on either distilled water (N = 60) or water containing 1% calcium gluconate (N = 60) for 3 days. Animals that were ...
Sensitivity of AMPA receptor channel to calcium oscillations: A computational study
(2003-06-01)
We used a computational model of biochemical pathways that are involved in the phosphorylation/dephosphorylation of AMPA receptor to study the receptor responses to calcium oscillations. In the model, the biochemical ...
Determination of calcium by atomic absorption spectrophotometry applied to the preparation of alginate:chitosan complexes
(2004-12-01)
Polysaccharicles, as alginate and chitosan, have been used to obtain modified release dosage forms. Alginate, due to its property of building gels during the complex formation with calcium ions, allows the building of ...
Reaction of rat connective tissue to implanted dentin tubes filled with mineral trioxide aggregate or calcium hydroxide
(1999-03-01)
This study was conducted to observe the rat subcutaneous connective tissue reaction to the implanted dentin tubes filled with calcium hydroxide or mineral trioxide aggregate. The animals were sacrificed after 7 and 30 days, ...
Osteogenesis-inducing calcium phosphate nanoparticle precursors applied to titanium surfaces
(2013-05-20)
This study investigated the effects of the morphology and physicochemical properties of calcium phosphate (CaP) nanoparticles on osteogenesis. Two types of CaP nanoparticles were compared, namely amorphous calcium phosphate ...
Alternative calcium source effects on commercial egg production and quality
(Facta-fundacio Arnco Ciência Tecnologia Avicolas, 2007-06-01)
This study aimed at verifying the possibility of replacing calcitic limestone by marine calcium in the diet of layers. A total number of 321 Hi-sex hens, with 40 weeks of age at the beginning of the experiment, was used. ...
Calcium intake and its relationship with risk of overweight and obesity in adolescents
(Archivos Latinoamericanos Nutricion, 2009-03-01)
Adolescents' eating habits are determined by social, psychological, economic, political, and educational influences. They tend to prefer foods with inadequate nutritional value and high fat and carbohydrate content which ...