نتایج جستجو برای: corrosive properties
تعداد نتایج: 871535 فیلتر نتایج به سال:
BACKGROUND EUS, as it images the full thickness of the gastrointestinal tract wall, could provide more detailed information on benign esophageal strictures. Aim of this study was to evaluate the role of EUS in predicting the response to endoscopic dilatation in benign esophageal strictures. METHODS 27 patients with benign strictures (corrosive 14, peptic 10 & post-radiation 3) were prospectiv...
Ingested corrosive agents produce oropharyngeal and gastroesophageal injuries ranging from minor burns to severe necrosis, depending on the agent amount, concentration, and duration of exposure. The aim of this study was to present our patients with corrosive ingestion retrospectively. Four hundred seventy-three children younger than 16 years of age (mean age, 3.7+/-0.1 years) who were admitted...
This paper presents a method for evaluating the reliability of an in-service highway bridge that considers the resistance capacity loss due to various corrosive environments. To demonstrate the application of the suggested method, a pre-stressed concrete-I (PSC-I) type girder was selected as a sample bridge. An analytical procedure was developed to quantitatively evaluate the performance degrad...
Introduction: The aim of this study was to assess the clinical profile of patients with benign strictures of middle and lower thirds of esophagus , to analyse the grade of dysphagia and site of stricture by barium swallow and to describe the endoscopic and histopathological findings in them Methods: It was a prospective, cross sectional, descriptive study where thirty patients with benign struc...
Plasticizers are compounds which add to solid propellants’ formulations to improve their mechanical properties. These materials have key role in the control of mechanical properties. 2,4-Dinitrotoluene (2,4-DNT) is one of the most important plasticizers of double based propellants. In this study, new series of Brønsted acidic ionic liquids (ILs) have been prepared and introduced as...
were removed, and on the 8th day, that is, on the 16th June, he was discharged cured. Since then I met him about a week ago, he is all right and perfectly recovered. Remarks.?It is a curious thing that even when the membrane of brain are -exposed, there was no symptom of brain mischief. Secondly, a portion of bone, though broken, united kindly within so short a time. Lately I was reading Dr. Cr...
The vibration behavior of structures can be characterized in terms of resonance frequencies and mode shapes which describe properties of the tested object in a global way but do not in general provide information about structural details. Following an asymptotic formalism, in much the same spirit as the work in [3] and recent text [1], we develop a simple method to address the inverse problem o...
Dense and vertically aligned ZnO nanorod arrays with a large area have been fabricated successfully on the stainless steel mesh by a simple chemical vapor deposition method. The coated mesh exhibited both superoleophilic and superhydrophobic properties, even if it was not modified by low surface energy materials. The separation efficiencies were more than 97% in the filtration of water and oil....
The metallic corrosion is a spontaneous process that causes damage in almost all sectors of human activity. Among the most affected structures stand out the pipes for oil transportation. The biocorrosion occurs due to the fixation of bacteria, release of metabolites and formation of biofilms that induce or accelerate the corrosion process. Among the groups of bacteria involved in the corrosion ...
different amounts of nanoclay were incorporated into the acrylic resin matrix at 0, 1, 3, and 5 wt.% loadings. the coatings were applied on low carbon steel plates. optical microscopy, sedimentation test, transmission electron microscopy, and x-ray diffraction were employed to investigate the dispersion of nanoclay in matrix. the corrosion resistance of coatings was evaluated by electrochemical...
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