Analysis of Tribological, Mechanical and Thermal Behavior for an Epoxy-Clay Composite System

Abstract

The prediction of polymer properties, based on its composition, it is a complex problem with no easy method to obtain directly and accurately results. Among the tribological properties, the friction coefficient and wear rate are the most interesting ones. The polymers based on epoxy resin, with clay as filler, show different properties depending on the clay concentration. This paper presents an analysis of the polymer properties variation with its filler concentration. Due to the tribological processes complexity, mechanical and thermal properties must be taken into account. The aim of this study is to find an optimal concentration value, with minimal influence on polymer properties. All value properties will be used in a neural network model in order to optimize and predict the composite properties.

Assessment of Bacteria Resistance According to Antibiotic Chemical Structure

“…Several antimicrobial-resistant organisms are mainly spread among patients and healthcare profession. Five of most frequently mechanisms of resistance bacteria showing high prevalence in clinical isolates are penicillin binding protein modification, protein mutations, enzymatic inhibition, efflux pomps and target changes [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The antibacterial effect of these antimicrobial agents depends on the capacity of the drug to penetrate cell membrane, the stability of the antibiotic against bacterial degradation as much as the affinity of the antibiotic for its target proteins.…”

Study on the Mechanism of Antibiotic Resistance

“…Antibioresistance is considered a global public health threat being implicated in elevated mortality and morbidity rates as a consequence of hospitalization [1][2][3]. Studies revealed that between 3% and 5% of hospitalized patients leave the care unit acquiring healthcare-associated infections [4][5][6][7][8][9][10][11][12][13]. The most widely used antibiotics to treat some bacterial infections by inhibiting cell wall biosynthesis are â-lactam antibiotics.…”

Study on the Formulation and Pharmacotechnical Characterization of Hydrophilic Matrix Tables with Amiodarone Chlorhydrate

“…Numerous studies demonstrating the efficacy and versatility of that matrix-forming agent are provided in the literature [8]. Similar studies were carried out in the literature [9][10][11][12][13][14][15][16][17][18][19][20][21].…”