OBJECTIVES The purpose of this study was to evaluate the shear bond strength (SBS) of orthodontic brackets bonded with two types of nano-composites in comparison to a conventional orthodontic composite. MATERIALS AND METHODS Sixty extracted human first premolars were randomly divided into 3 groups each containing 20 teeth. In group I, a conventional orthodontic composite (Transbond XT) was us...

Statement of the Problem Orthodontic appliances facilitate microbial plaque accumulation and increase the chance of white spot lesions. There is a need for new plaque control methods independent of patient's cooperation. Purpose The aim of this study was to determine the effects of incorporating copper oxide (CuO) nanoparticles on antimicrobial properties and bond strength of orthodontic adhe...

The application of nanotechnology in the corrosion protection of metals has recently gained momentum; Environmental impact can improved by utilizing nanostructure particulates in corrosion inhibition, Nano composites have also proven to be an effective alternative to other hazardous and toxic compounds, the present article reports some of the preliminary investigations on the corrosion-resistan...

Metal matrix composite coatings reinforced with nano-particles have attracted scientific and technological interest due to the enhanced properties exhibited by these coatings. Cobalt/hexagonal boron nitride nano-composite coatings were prepared by means of the pulse current electroplating from a chloride electrolyte on copper substrates and a comparison was made with the pure cobalt in terms of...

1 Leibniz-Institut für Polymerforschung Dresden e. V., Dresden, Germany, 2 Institut für Werkstoffwissenschaft, Technische Universität Dresden, Dresden, Germany, 3 Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou, China, 4 “V. A. Bely” Metal-Polymer Research Institute, National Academy of Sciences of Belarus, Gomel, Belarus, 5 Center for Composite Materials, Un...

In recent years, the effects of heterogeneous catalysts for the oxidation of organic and inorganic pollutants in industrial wastewaters are spread. Traditionally, these reactions are usually carried out using suspensions of photo-catalysts such as TiO2. A chemical method including TiCl4, Al(NO3)3, ethanol amine, ethyl acetoacetate and aqueous ammonia were used for the fabrication of TiO2-Al2O3 ...

RÉSUMÉ. Dans cet article, nous présentons une approche de modélisation et conception d’agents et de systèmes multi-agents (SMA). Elle s’appuie sur la proposition d’un modèle générique de SMA et d’un modèle hybride d’implémentation supportant les caractéristiques du paradigme agent. Ce modèle hybride offre des avantages intrinsèques de manipulation et d’interrogation des systèmes modélisés. Nous...

A novel bath lily-like graphene sheet-wrapped nano-Si composite synthesized via a simple spray drying process exhibits a high reversible capacity of 1525 mAh g(-1) and superior cycling stability, which could be attributed to a synergistic effect between highly conductive graphene sheets and active nanoparticles in the open nano/micro-structure."

This paper reviews the most relevant achievements and new developments in the field of nanomaterials and their possible impact on the fabrication of a new generation of reliable and longer lasting implants for joint replacement. Special emphasis is given to the role of nanocomposites with different microstructural designs: micro-nano composites, nano-nano composites, macro-micro-nano composites...

A bioactive composite of nano calcium-deficient apatite (n-CDAP) with an atom molar ratio of calcium to phosphate (Ca/P) of 1.50 and poly(ɛ-caprolactone)-poly(ethylene glycol)-poly(ɛ-caprolactone) (PCL-PEG-PCL) was synthesized, and a composite scaffold was fabricated. The composite scaffolds with 40 wt% n-CDAP contained well interconnected macropores around 400 μm, and exhibited a porosity of 7...