Articolele autorului Ioana Demetrescu
Link la profilul stiintific al lui Ioana Demetrescu

Electrochemical Synthesis and Characterization of Ti Modified Electrodes with Polypyrrole – Polyethylene Glycol Hybrid Coating
In vivo arguments for the TiAlV Corrosion

The behavior of some metallic biomaterials before and after extraction from human body is presented based on electrochemical data, focusing on the corrosion resistance and modifications in the body fluids. The changes in parameters characterization of metallic biomaterials before and after implantation should be associated to the events that occur in the body (adsorption and desorption) as an expression of the correlation between simulation date

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Monitoring TiO2 nanotubes elaboration condition, a way for obtaining various characteristics of nanostructures

In this paper the elaboration and characterization of TiO2 nanotubes as a function of anodizing conditions are studied taking into consideration electrolyte composition and voltage. The obtained results show that the nanotubes dimensions and surface features depend on elaboration conditions. The technique of surface characteristics investigation (D and 3 D images) was atomic force microscopy which permitted roughness and porosity evaluation.

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Monitoring TiO2 nanotubes elaboration condition, a way for obtaining various characteristics of nanostructures

In this paper the elaboration and characterization of TiO2 nanotubes as a function of anodizing conditions are studied taking into consideration electrolyte composition and voltage. The obtained results show that the nanotubes dimensions and surface features depend on elaboration conditions. The technique of surface characteristics investigation (D and 3 D images) was atomic force microscopy which permitted roughness and porosity evaluation.

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Polypyrrole as conducting polymer coating Ti6Al7Nb alloy ,

Conducting polymer coating has been used to improve the surface performance of metallic materials, as Ti6Al7Nb alloy. Polypyrrole (PPy) was electrochemical deposited from 0,2 M oxalic acid aqueous monomer solutions by three different methods: potentiostatic, galvanostatic and potentiodynamic techniques. The stability of PPy /Ti-6Al-7Nb surface have been studied by electrochemical methods in Hank’s Balanced Salt Solution (HBSS) by Tafel tests and

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Surface analysis and cell biology technique in understanding degradation of natural temporary teeth collected from area with high pollution.

The aim of this paper is to correlate surface features of degraded temporary teeth from area with high pollution with the cell culture,adhesion and proliferation of human gingival fibroblasts (HGF).

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Ternary biopolymeric films based on collagen gel, polyethylene glycol and hydroxyapatite ,

The paper presents elaboration and characterization of new biopolimer films based on collagen gel, polyethylene glycol and ydroxyapatite. In vitro biocompatibility test for such films were performed and discussed taking into account their potential bioapplication

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ICP/MS in evaluation heavy metal influence on the behavior of natural temporary teeth.

The aim of this paper is to evaluate using ICP/MS ( inductively inductively coupled plasma mass spectrometry method )the small amount of heavy metal existing in temporary teeth of target group of children from area with high environmental risk regarding heavy metals, and to correlate this amount with the state of degradation of such teeth, taking into account that teeth are biological archive.

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Passive and Bioactive Films on Implant Materials and their Efficiency in Regenerative Medicine

The article presents various behavior aspects of passive and bioactive films on Ti and CoCr alloy and their efficiency in regenerative medicine, taking into account that metallic materials are typically inert, but various surface treatments are devoted to build films which change them into active materials. The studied passive films were oxides and bioactive films with collagen and phosphate coat- 10 ings. All films were characterized from the point

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The Methionine Influence on Artificial Saliva Oxidant Character

The goal of this article is to establish the influence of methionine – an important amino acid from human body which exists in different aliments – on the oxidant character of artificial saliva in the presence of a titanium alloy implant. As titanium alloy was proposed Ti6Al4V with a surface passivated using anodization or treated in acids. As simulated artificial saliva were used well known composition Afnor and Carter-Brugirard solutions.

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