Barite Effect on Radiation Shielding Properties of Cotton-Polyester Fabric

Akkurt, I.; Emikönel, Serpil; Akarslan, Feyza; Günoğlu, Kadir; Kılınçarslan, Şemsettin; Üncü, İsmail Serkan

doi:10.12693/aphyspola.128.b-53

Cited by 50 publications

(14 citation statements)

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“…Very small part of the X-ray beam, passing through tissues, having high atomic density, reaches the film. It is seen on the film as light grey and white regions [6]. Almost the entire beam, passing through air gaps, without being blocked, reaches the film.…”

Section: Methodsmentioning

confidence: 99%

Determination of Radiation Shielding Properties of Fabrics using Image Processing Method

et al. 2017

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It is extremely important to protect the human body from radioactive rays. Protective clothing can be used to absorb radiation because it is preferable to avoid the natural and artificial radiation exposure in our daily lives. There are many different types of fabric, used for clothes. In this study radiation absorbing properties of fabrics, which are widely used in the daily life, such as alpaca-type fabric, cotton fabric, cotton polyester blend fabric, woven dyed fabric and knitted fabric were examined using the image processing method.

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Section: Methodsmentioning

confidence: 99%

Determination of Radiation Shielding Properties of Fabrics using Image Processing Method

et al. 2017

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“…Methanol is one of the most abundant alcohols, present in the troposphere. It is usually found with concentrations ranging from 1 to 40 ppb by volume [50][51][52].…”

Section: Potential Energy Surface For the Reaction Of Methanol With Cmentioning

confidence: 99%

A Computational Study of the Ozonolysis of Phenanthrene

et al. 2017

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A computational study of the ozonolysis of phenanthrene has been carried out using DFT methods (B3LYP and M06-2X). The reaction mechanism for the ozonolysis was studied in both gas phase and in solution, using the polarizable continuum solvation model. The structures for all proposed reaction mechanisms were optimized using M06-2X and B3LYP methods with 6-31G(d), 6-31+G(d), and 6-31G(2df,p) basis sets. In solution, all structures were optimized using B3LYP/6-31+G(d,p) and polarizable continuum solvation model. Six different mechanistic pathways were explored for the ozonolysis of phenanthrene that forms aldehyde compounds. The activation energy of the formation of the primary ozonide intermediate in pathway A is 13 kJ mol −1 in the polarizable continuum model with the B3LYP/6-31+G(d,p) method. This reaction is followed by a dissociation into a zwitterionic Criegee intermediate with an activation energy of 76 kJ mol −1 in polarizable continuum model with B3LYP/6-31+G(d,p). Furthermore, the nucleophilic addition reactions of methanol to the Criegee intermediate have been studied along two pathways, B1 and B2. The water-mediated mechanism for pathways B2 and C2, where the water molecule acts as a mediator through a 1,5-proton shift, dropped the activation barriers by 18 and 26 kJ mol −1 , respectively, based on B3LYP/6-31G(2df,p) method. The solvation model (polarizable continuum) reduces the energy barriers for all pathways except for the reaction of methanol with the Criegee intermediate. This study provides an insight into understanding the mechanism of transformation of this pollutant into non-toxic compounds.

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“…The problems related to waste production are becoming more and more important in relation to the improvement of economical conditions, the progress of industrial development and the population and urban increase. For that reason, there is an effort in extending the application of waste mainly by innovative technologies for the manufacture of new products [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Recycling of Coal Ash in Production of Low Density Masonry Unit

2017

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Coal ash is a residue that is created when coal is burned by power plants to produce electricity. Coal ash is one of the largest types of industrial waste and causes environmental pollution. On the other hand, coal ash is potentially a valuable source of minerals, including SiO2, Al2O3, CaO, MgO, Fe2O3, Na2O and K2O. This study aims to recycle the coal ash in production of low density masonry unit. Coal ash was characterized by chemical and X-ray diffraction analyses. The batches containing different ratios of coal ash and a brick making clay were prepared and shaped by cold pressing. The pressed samples were fired at 1050 and 1100• C. The physical properties such as water absorption, apparent porosity, linear shrinkage, and bulk density were determined. Microstructural observations were performed by using scanning electron microscopy. Based on the technological characteristics; it was observed that low density masonry units can be produced by using coal ash. This study supports the responsible recycling of coal ash by distinguishing beneficial use from disposal.

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Barite Effect on Radiation Shielding Properties of Cotton-Polyester Fabric

Cited by 50 publications

References 1 publication

Determination of Radiation Shielding Properties of Fabrics using Image Processing Method

Determination of Radiation Shielding Properties of Fabrics using Image Processing Method

A Computational Study of the Ozonolysis of Phenanthrene

Recycling of Coal Ash in Production of Low Density Masonry Unit

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