The effects of pH and chloride concentration on the electrochemical corrosion of copper in aqueous sodium chloride (NaCl) media were studied at the micro scale using a microcapillary droplet cell and at the macro scale using a conventional large scale cell. Using an experimental design strategy, electrochemical response surface models of copper versus pH and NaCl concentration were constructed ...

Corrosion surface damage in the form of pitting and micro-cracks is observed in many metals. Cracks usually initiate from the pits and grow under cyclic stresses and eventually lead to material failure. An image analysis based on wavelet transforms and fractals was used to study the corrosion morphology of nickel aluminum bronze metal under varying corrosion conditions and applied stresses. Ima...

Introduction: Numerous factors are considered to determine human bone quality. Particularly, volumetrically evaluated bone mineral density (DXABMD) as well as the mechanical properties of bone samples serve to assess fracture risks. However, the differentiation and degree of mineral content and/or morphology effects on bone toughness remained to a large extent unanswered due to large measuring ...

INTRODUCTION The apical constriction (AC) has been a traditional landmark as an end point of canal preparation and obturation. However, the morphology and incidence of this structure have not been definitively determined. The purpose of this study was to determine these factors by using a noninvasive technology, micro-computed tomography. METHODS Forty extracted maxillary molar palatal roots ...