The coating of titanium and its alloys with hydroxyapatite (HA) by various methods was presented. The vacuum deposition, plasma spraying, sol-gel and coating, electrolytic methods were used.

The SAPO-5 zeolite-filled polyurethane membranes with perselectivity to the gases or liquids were prepared, characterized and utilized for the ultra- and, respectively, microfiltration (UF + MF) of synthetic wastewater containing colophony. The influence of the colloidal dispersion concentration on the membrane processes has been followed. Also, the conversion degree of colophony colloidal dispersions has been studied versus light diffusion through

The nature of the metal (Mg and/or Fe) salts, used as precursors during the synthesis process of layered double hydroxides, is used as a controlled variable synthesis parameter to obtain iron-containing anionic clay matrices with specific properties. The XRD and N2 adsorption at 77 K analyses indicate that the structural and the textural features of the synthesized clays are influenced by the use of chloride, sulphate or nitrate, as different salts

This paper presents a study on an alternative coating method based on biomimetic techniques which are designed to form a crystalline HA layer in a manner similar to the process of natural bone formation. The HA formation on the surface of titanium alloy pretreated with NaOH solution is investigated. Two types of solutions such as supersaturated calcification solution (SCS) and modified SCS (M-SCS) were used to investigate bone-like apatite formation

SAPO-5 zeolite has been used to modify the structure of polyurethane membranes and to improve their properties. Scanning electron microscopy (SEM), Fourier Transform Infrared spectroscopy (FTIR), Bubble-point test, water permeability, swelling in water and several alcohols (methanol, ethanol, 1-propanol and 1-butanol) and density measurements have been used to study the incorporation of SAPO-5 zeolite in polyurethane membranes, the changes of supramolecular

New hybrid nanostructures based on inorganic matrices of hydrotalcite-like anionic clays (HT) incorporated with oxacillin are obtained by using calcinations-restructure method. XRD and TEM analyses are used to study the structural and textural characteristics of the clay containing hybrids. When nanoparticles of iron oxides are loaded on the layered anionic clay matrix a more effective delivery system of the drug is obtained. The results can be used

This work presents a study on an alternative coating method based on biomimetic techniques which are designed to form a crystalline hydroxyapatite layer very similar to the process corresponding to the formation of natural bone. The HA formation on the surface of titanium alloy pretreated with NaOH solution is investigated. Two types of solutions such as supersaturated calcification solution (SCS) and modified SCS (M-SCS) were used to investigate

Chemical sensors utilizing immobilized enzymes and proteins are important for monitoring chemical processes and biological systems. Glucose oxidase (GOx) from Aspergillum Niger is a flavoenzyme that has been used to determine glucose. Among the conventional methods of enzyme deposition the main strategy consists in its entrapment in an inert matrix adsorbed on the electrode surface. We report here the synthesis and physical - chemical characterization

Copper and cerium partially substituted anionic clay was synthesized by the coprecipitation method. The XRD analysis and N2 adsorption at 77 K indicated that calcination destroys the layered matrix of the clay, giving rise to mixed oxides having a high surface area and mesoporous characteristics; SEM analysis showed that the new formed mixed oxides consist of ensembles of highly agglomerated, interconnected nanoparticles. It results from XPS that

This work describes the preparation of a hydroxyapatite/polyurethane composite membrane and their characteristics. The porous hydroxyapatite/polyurethane composite membranes were made via solvent casting process. The deposited hydroxyapatite layers were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The data suggest that the method utilized in this work can be applied to obtain deposition of coating of crystalline