Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Characterization of calcium phosphate coating and zinc incorporation on the porous alumina scaffolds
Bone ingrowth requires materials with the existence of open and interconnected pores with diameters larger than 150 µm for proper circulation of nutrients. Such materials must possess enough mechanical strength to avoid failure whilst offering a bioactive surface for bone regeneration. We have developed porous ceramic…
Poly(vinyl alcohol)/sulfonated polyester hydrogels produced by freezing and thawing technique: preparation and characterization
Poly(vinyl alcohol) (PVA) hydrogels were obtained by freezing (-22 °C) and thawing (+25 °C) process, resulting in a semi-interpenetrating polymer network (s-IPN) with a sulfonated polyester (PES). The cryo-gels samples were analysed in terms of its water uptake capacity (WU) as a function of pH, temperature and ionic…
Ternary blend cements concrete. Part II: Transport mechanism
With today’s extensive use of cements containing two or more additions (blended cements), predicting concrete durability on the grounds of its strength alone leads to errors that may affect the service life of the resulting structures. Indeed, concrete of a given strength class can be made from different materials and…
Effect of Thermal and Irradiation Aging on the Ballistic Behavior of Aramid Reinforced Epoxy Composite
Microplate reader analysis of triatomine saliva effect on erythrocyte aggregation
Our hypothesis is that the action of aggregating and disaggregating substances in the blood can be detected and quantified by the Microplate Reader. To ascertain the validity of this hypothesis, we selected two types of blood: one that naturally presents erythrocyte aggregation (pig blood) and the other that does not…
Modeling of asphalt-rubber rotational viscosity by statistical analysis and neural networks
It is of a great importance to know binders' viscosity in order to perform handling, mixing, application processes and asphalt mixes compaction in highway surfacing. This paper presents the results of viscosity measurement in asphalt-rubber binders prepared in laboratory. The binders were prepared varying the rubber c…
Effect of Hole Parameters on the Elastic-Plastic Stress Distribution of Square Perforated Thermoplastic Composite Plates
Article Effect of Hole Parameters on the Elastic-Plastic Stress Distribution of Square Perforated Thermoplastic Composite Plates was published on March 1, 2007 in the journal Science and Engineering of Composite Materials (volume 14, issue 1).
Surface modification of synthetic clay aimed at biomolecule adsorption: synthesis and characterization
This work describes the process for functionalization of laponite through the grafting of 3-mercaptopropyltrimethoxysilane (MPTS). Laponite is synthetic smectite clay with surface area of 350 m²/g. The samples, prior to and after functionalization, were characterized by chemical analyses, thermogravimetric analysis (T…
Technical Note: Statistical analysis of defects of tiles´ joints
The present article addresses tile joint defects in interior and exterior floors and walls. It begins with a classification of tile joint defects along with their likely causes, establishing a correlation matrix between the two sets of parameters. This is followed by the identification of the flaws found most frequent…
Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites
This study investigated the influence of ethanol concentration on softening tests for cross-link density evaluation (microhardness) of dental composites. Specimens of Filtek Z100 (3M ESPE) were light-activated by standard or pulse-delay methods. After initial Knoop hardness readings (KHN1), half of specimens (n = 10)…
TABLE OF CONTENTS
Behaviour of corroded steel in a Ca(OH)2-saturated solution and in cement mortar. Possibility of rehabilitation
The present study compared the response of rust-free and corroded steel electrodes in Ca(OH)2-saturated solutions and in cement mortar, essentially defined in terms of polarization resistance as measured with gravimetric, metallographic and electrochemical methods. Answers were sought for the following questions, whic…
Elastic-Plastic Thermal Stress Analysis Of An Aluminum Metal-Matrix Composite Arch Under Steady-State Temperature Distribution
Influence of the nano-micro structure of the surface on bacterial adhesion
Biomaterials failures are frequently associated to the formation of bacterial biofilms on the surface. The aim of this work is to study the adhesion of non motile bacteria streptococci consortium and motile Pseudomonas fluorescens. Substrates with micro and nanopatterned topography were used. The influence of surface…
Characterization and transformation of an industrial by-product (coated paper sludge) into a pozzolanic material
The effective re-use of industrial by-products calls for an understanding of their chemical, mineralogical and physical characteristics. The by-product used in this study was coated paper industry sludge from a plant whose sole prime material is recycled paper. Due to its high organic and calcium carbonate content and…
Congresos y Seminarios
Preparation of hybrid biomaterials for bone tissue engineering
Tissue engineering has evolved from the use of biomaterials for bone substitution that fulfill the clinical demands of biocompatibility, biodegradability, non-immunogeneity, structural strength and porosity. Porous scaffolds have been developed in many forms and materials, but few reached the need of adequate physical…
Magnesium and its alloys as degradable biomaterials: corrosion studies using potentiodynamic and EIS electrochemical techniques
Magnesium is potentially useful for orthopaedic and cardiovascular applications. However, the corrosion rate of this metal is so high that its degradation occurs before the end of the healing process. In industrial media the behaviour of several magnesium alloys have been probed to be better than magnesium performance…
Influence of ionic strength on the viscosities and water loss of bentonite suspensions containing polymers
A study was made of the influence of ionic strength (S) on the apparent (AV) and plastic (PV) viscosities and water loss (WL) of sodium bentonite suspension with polymers. Na-bentonite was dispersed in water (4.86% w/w) of different ionic strengths (S = 0.0, 0.015, 0.030 and 0.045 M) followed by the addition of polyme…