Polyaniline - morphology and sensing properties

The adsorption process of dye on polyaniline films electrodeposited on niobium has been investigated using electrochemical impedance spectroscopy. ads value (- 35.802 kJ mol-1 ) and high value of Kads obtained in our measurements indicate that Amino Black 10 adye adsorption process is spontaneous with the formation of a stable adsorbed dye layer on the polyaniline surface. The adsorption takes place via a combination of physical and chemical adsorption

Electrochemical oxygen intake/release process over YBaCo2Fe2O7.5 electrodes in aqueous solutions

The present study proves that YBaCo2Fe2O7.5 perovskite has high performance for oxygen storage capacity in aqueous solutions by electrochemical oxidation. This perovskite is a promising candidate for applications requiring efficient oxide ion conductivity or large oxygen storage capacity is. The oxygen intake/release propriety of YBaCo4O7 has been studied by cyclic voltammetry and chronoamperometry in alkaline and neutral aqueous electrolytes

Electrochemical synthesis of poly-3-aminophenylboronic acid in sulfuric acid solution

Sensors based on the complexation of boron groups with diols are an attractive alternative to detection of biologic compounds in particular dopamine. The electropolymerisation of 3- aminophenylboronic acid (APBA) in aqueous solutions on Pt electrodes has been investigated. The obtained poly-3-aminophenylboronic acid is used for the potentiometric detection of dopamine

Electrochemical oxygen uptake/release process over Ca-112 electrodes in aqueous solutions

This paper presents the electrochemical study of Y3+ substitution with Ca2+ ions on intake/release of oxygen. These studies were performed using alkaline solution (1 mol L-1 KOH) and also neutral solution (0.5 mol L-1 Na2SO4). All electrochemical behavior presented in this paper has been studied by cyclic voltammetry

Electrochemical oxygen uptake/release process on Ca doped Y-114 electrodes in aqueous solutions

In present study, the electrochemical characterization of Y0.5Ca0.5BaCo4O7 compound in aqueous solution: alkaline (1 molL-1 KOH) and neutral (0.5 mol L-1 Na2SO4) was followed, correlated with the study of oxygen intake/release process. The use of neutral aqueous solutions is an element of originality in electrochemical studies performed on this family of layered cobalt perovskites. Electrochemical behavior has been studied by cyclic voltammetry and chronoelectrochemical methods: chronoamperometry and chronocoulometry

Temporomandibular joint atlas for detection and grading of juvenile idiopathic arthritis involvement by magnetic resonance imaging

Contrast-enhanced magnetic resonance imaging (MRI) is considered the diagnostic standard for identifying involvement of the temporomandibular joint by juvenile idiopathic arthritis. Early or active arthritis is shown as bone marrow oedema, joint effusion, synovial thickening and increased joint enhancement. Subsequent joint damage includes characteristic deformity of the mandibular condyle, bone erosion, disk abnormalities and short mandibular ramus due to impaired growth. In this pictorial essay, we illustrate normal MRI findings and growth-related changes of the temporomandibular joint in children. The rationale and practical application of semiquantitative MRI assessment of joint inflammation and damage are discussed and presented. This atlas can serve as a reference for grading temporomandibular joint arthritis according to the scoring systems proposed by working groups of OMERACT (Outcome Measures in Rheumatology and Clinical Trials) and the EuroTMjoint research network. Systematic assessment of the level of inflammation, degree of osteochondral deformation, and growth of the mandibular ramus by MRI may aid in monitoring the course of temporomandibular joint arthritis and evaluating treatment options