The metal ion release characteristics and biocompatibility of meta-based materials are key factors that influence their use in orthodontics. Although stainless steel-based alloys have gained much interest due to mechanical properties cost, they prone localised attack after prolonged exposure the hostile oral environment. Metal ions may induce cellular toxicity at high dosages. To circumvent the...

A highly sensitive spectroscopic method using dichlorofluorescin (LDCF) was employed to study the rate of electron-transfer reaction in presence of dsDNA, ssDNA and some metal ions and imidazole derivative (N-trans cinnamoyl imidazole).Our results show that both kinds of DNA possess an enzyme-like catalytic activity in oxidative conversion of non fluorescent LDCF to fluorescent DCF. A biphasic ...

The metal ion co-ordination sites of many metalloproteins have been characterized by a variety of spectroscopic techniques and small-molecule model systems, revealing many important insights into the structural determinants of metal ion co-ordination. However, our understanding of this fundamentally and practically important phenomenon remains frustratingly simplistic; in many proteins it is es...

The biosorption of heavy metals can be an effective process for the removal of such metal ions from aqueous solutions. In this study, the adsorption properties of nonliving biomass of phanerochaete chrysosporium for Pb (II) and Zn (II) were investigated by the use of batch adsorption techniques. The effects of initial metal ion concentration, initial pH, biosorbent concentration, stirring speed...

introduction: this in vitro study measured and compared ph and phosphate and calcium ions release of a new endodontic material (cem cement), mineral trioxide aggregate (mta), and portland cement (pc) using uv-visible technique, atomic absorption spectrophotometry methods, and ph meter, respectively. materials and methods: each material was placed in a plastic tube (n=10) and immersed in a glass...

Thermodynamic parameters of complex formation between d(10) metal ions, such as Zn(2+), Cd(2+), Hg(2+) and Ag(+), and the macrocyclic thioether 1,4,7-trithiacyclononane ([9]AneS3) or the monodentate diethylsulfide (Et(2)S), in acetonitrile (AN) at 298.15 K, were studied by a systematic methodology including potentiometry, calorimetry and polarography. [9]AneS3 is able to form complexes with all...

A novel hybrid of azacrown ether-oxabridged fluorogenic chemosensor (1) has been synthesized: the metal ion binding ability of the hybrid molecule shows higher affinity towards transition metal ion Zn(2+) and heavy metal ion Hg(2+) compared to the parent azacrown ether which shows poor metal ion selectivity: the binding modes of the Zn(2+) and Na(+) towards have been discussed.