In the present work, a portable device system applied in the detection and classification of different metallic ions was proposed and developed, aiming at its application in the monitoring of hydrological systems like rivers, lakes and groundwater. Considering the system features, a portable colorimetric system was developed by using a multispectral optoelectronic sensor. All the technology of ...

INTRODUCTION Orthodontic mini-implants are a potential source of metallic ions to the human body because of the corrosion of titanium (Ti) alloy in body fluids. The purpose of this study was to gauge the concentration of Ti, aluminum (Al), and vanadium (V), as a function of time, in the kidneys, livers, and lungs of rabbits that had Ti-6Al-4V alloy orthodontic mini-implants placed in their tibi...

Universidade Federal do Rio Grande do Sul, PPGEM, Av. Bento Gonçalves, 9500, Setor 4, Prédio 74, Cep. 91501-970, Porto Alegre, RS, Brazil, Departament de Quı́mica, Escola Politècnica Superior, Universitat de Lleida, c/Jaume II no. 69, Lleida E-25001, Spain, Centro Universitário Feevale, ICET, RS 239-2755, Cep. 93352-000, Novo Hamburgo, RS, Brazil, Departament d’Enginyeria Quı́mica, ETS d’Enginyer...

I t has long been known tha t metals in some way are ve ry closely connected with the processes of respiration and oxidation in bo th plants and animals, and the mode of their action has been the subject of a great deal of research and discussion. The most impor tan t of these metals is undoubted ly iron, and the recent work of Warburg (1925) and Meyerhof (1924) has gone far toward elucidating ...

Biosynthesis is progressing owing to economical synthesis and the availability of organisms (good source metabolites) which significantly complex cap metallic ions produce stable nanomaterials.

The geometry of metal nanoparticles greatly affects the properties of the localized surface plasmon resonance and surface-enhanced Raman scattering. The synthesis of metal nanoparticles with controllable geometry has thus attracted extensive attentions. In this work, we report a modified polyol synthesis approach of silver (Ag) nanocubes through tuning the concentration of bromide ions (Br(-) i...

Abstract This chapter introduces a general protocol to transfer metal ions from aqueous solution to an organic medium, which involves mixing the aqueous solution of metal ions with an ethanolic solution of dodecylamine (DDA), and extracting the coordinating compounds formed between metal ions and DDA into toluene. This protocol could be applied toward transferring a wide variety of transition m...

Plant viruses are considered as nanobuilding blocks that can be used as synthons or templates for novel materials. Cowpea mosaic virus (CPMV) particles have been shown to template the fabrication of metallic nanoparticles by an electroless deposition metallization process. Palladium ions were electrostatically bound to the virus capsid and, when reduced, acted as nucleation sites for the subseq...

A series of nickel-containing mesoporous silica samples (Ni-SiO₂) with different nickel content (3.1%-13.2%) were synthesized by the evaporation-induced self-assembly method. Their catalytic activity was tested in carbon dioxide reforming of methane. The characterization results revealed that the catalysts, e.g., 6.7%Ni-SiO₂, with highly dispersed small nickel particles, exhibited excellent cat...