Characterization and dose-mapping of an X-ray blood irradiator to assess application potential for the sterile insect technique (SIT)

Geopolymers, also known as inorganic polymers, are aluminosilicates with cementing characteristics that have great application potential. They are produced by the alkaline activation of aluminosilicates precursors such as industrial wastes, calcined clays, natural minerals, among others and have their properties intimately associated to characteristics of the precursor materials and curing conditions. In this sense, this study aims to evaluate the mechanical behavior of geopolymers obtained from metakaolin according to the curing temperature. The geopolymerization was reached by the mixture of metakaolin with NaOH and the curing of the specimens was held at room temperature, 60°C and 100°C. The specimens were characterized by X-ray diffraction, mercury intrusion porosimetry, and SEM. The mechanical strength was determined by flexural test. The results show that the process of geopolymerization suffers a direct influence of the curing temperature used.

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Activation of persulfate by heterogeneous catalyst ZnCo2O4–RGO for efficient degradation of bisphenol A

Canadian Journal of Chemistry ◽

10.1139/cjc-2020-0192 ◽

2020 ◽

Vol 98 (12) ◽

pp. 771-778

Author(s):

Xin Chang ◽

Xiangyang Xu ◽

Zhifeng Gao ◽

Yingrui Tao ◽

Yixuan Yin ◽

...

Keyword(s):

Electron Microscopy ◽

Bisphenol A ◽

Photoelectron Spectroscopy ◽

X Ray Diffraction ◽

Reaction Conditions ◽

X Ray ◽

Transmission Electron ◽

Nucleation Sites ◽

One Step ◽

Application Potential

A nanocomposite, reduced graphene oxide (RGO) modified ZnCo2O4 (ZnCo2O4–RGO) was synthesized via one-step solvothermal method for activating persulfate (PS) to degrade bisphenol A (BPA). The morphology and structure of the nanocomposite were identified by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. RGO provides nucleation sites for ZnCo2O4 to grow and inhibits the agglomeration of the nanoparticles. The influence of different reaction conditions on the oxidation of BPA catalyzed by ZnCo2O4–RGO was investigated, including the content of RGO, the dosage of catalyst, the concentration of humic acid (HA), anions in the environment, the reaction temperature, and pH. BPA can be totally degraded within 20 min under optimized reaction conditions. The presence of HA, Cl−, and NO3− only has a slight effect on the oxidation of BPA, whereas the presence of either H2PO4− or HCO3− can greatly inhibit the reaction. ZnCo2O4–RGO shows good cycling stability and practical application potential. A reaction mechanism of the degradation of BPA was also explored.

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In situ Biological Dose Mapping Estimates the Radiation Burden Delivered to ‘Spared’ Tissue between Synchrotron X-Ray Microbeam Radiotherapy Tracks

PLoS ONE ◽

10.1371/journal.pone.0029853 ◽

2012 ◽

Vol 7 (1) ◽

pp. e29853 ◽

Cited By ~ 21

Author(s):

Kai Rothkamm ◽

Jeffrey C. Crosbie ◽

Frances Daley ◽

Sarah Bourne ◽

Paul R. Barber ◽

...

Keyword(s):

Radiation Burden ◽

X Ray ◽

Dose Mapping ◽

Biological Dose

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Comparison between pupal and adult X-ray radiation, designed for the sterile insect technique for Aedes albopictus control

Acta Tropica ◽

10.1016/j.actatropica.2019.105110 ◽

2019 ◽

Vol 199 ◽

pp. 105110 ◽

Cited By ~ 1

Author(s):

Wenting Du ◽

Chunming Hu ◽

Chaoju Yu ◽

Jianfei Tong ◽

Jie Qiu ◽

...

Keyword(s):

Aedes Albopictus ◽

Sterile Insect Technique ◽

X Ray

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X-RAY RADIATION EFFECTS ON THE DIELECTRIC PROPERTIES OF PZT CERAMICS

International Journal of Modern Physics B ◽

10.1142/s021797920704469x ◽

2007 ◽

Vol 21 (18n19) ◽

pp. 3433-3436

Author(s):

J. T. WANG ◽

C. ZHANG ◽

A. FITZGERALD ◽

Y. FU ◽

S. HALL

Keyword(s):

Dielectric Constant ◽

Radiation Dose ◽

Radiation Effects ◽

Baton Rouge ◽

Dielectric Constants ◽

X Ray ◽

Ceramic Disk ◽

Application Potential ◽

Preliminary Study

We have systematically studied the X-ray radiation effects on PZT thin ceramic disk provided by CTS Communications Components, Inc using the X-ray beam line in the Center for Advanced Micro-Structure and Devices (CAMD) in Baton Rouge, Louisiana. The photo energies of the X-ray range from 2000 eV to 8000 eV. The beam size is 10.0 cm ×1.0 cm .We measure the dielectric constant in situ with different dose of the radiation in one sample and in different samples. The dielectric constants as a function of radiation dose are presented in the paper. It demonstrates the effects on the dielectric constant. Unexpectedly, we also found that X-ray radiation on the PZT disk generates charges on the surface of the samples. We measured the surface voltage due to the X-ray radiation with different radiation dose at the same temperature for these samples. This founding may have application potential for photoelectric devices. This is just a preliminary study. More thorough investigations are needed.

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Room-temperature oxidation of ultrathin TiB2 films

Journal of Materials Research ◽

10.1557/jmr.2002.0118 ◽

2002 ◽

Vol 17 (4) ◽

pp. 805-813 ◽

Cited By ~ 9

Author(s):

Feng Huang ◽

W. J. Liu ◽

J. F. Sullivan ◽

J. A. Barnard ◽

M. L. Weaver

Keyword(s):

Magnetic Recording ◽

Photoelectron Spectroscopy ◽

Room Temperature ◽

Oxide Thickness ◽

Temperature Oxidation ◽

X Ray ◽

Force Microscopy ◽

Application Potential ◽

New Perspective ◽

Protective Overcoats

Titanium diboride has been claimed as a very promising candidate material for protective applications in the magnetic recording. Its oxidation resistance at room temperature is a critical criterion in assessing this application potential. In this paper, the oxidation characteristics of ultrathin TiB2 thin films, such as overcoat erosion and oxide thickness, are investigated via a combination of x-ray reflectivity, x-ray photoelectron spectroscopy (XPS), and atomic force microscopy. It was found that a <2-h exposure to air at room temperature led to the formation of approximately 15-Å-thick, well-defined oxides at the expense of an approximately 9-Å erosion of the TiB2 overcoats, coupled with the existence of a sharp oxide/TiB2 interface. XPS studies confirmed the existence of the oxides. Considering the decreasing allowable thickness for such protective overcoats, oxidation and the resultant thickness gain negate such a potential of ultrathin TiB2 films. The results in our current report provide a new perspective on its potential as protective overcoats in magnetic recording.

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Skin dose mapping for non-uniform x-ray fields using a backscatter point spread function

10.1117/12.2254257 ◽

2017 ◽

Cited By ~ 3

Author(s):

Sarath Vijayan ◽

Zhenyu Xiong ◽

Alok Shankar ◽

Stephen Rudin ◽

Daniel R. Bednarek

Keyword(s):

Point Spread Function ◽

Skin Dose ◽

X Ray ◽

Point Spread ◽

Spread Function ◽

Dose Mapping

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Influence of Dopants on Structure of Polycrystalline Bismuth Niobate

Advances in Materials Science ◽

10.1515/adms-2017-0048 ◽

2018 ◽

Vol 18 (4) ◽

pp. 35-41

Author(s):

D. Czekaj ◽

A. Lisińska-Czekaj

Keyword(s):

Diffraction Method ◽

Elementary Cell ◽

Orthorhombic Symmetry ◽

Sintering Aids ◽

X Ray Diffraction ◽

Bismuth Niobate ◽

X Ray ◽

Cell Parameters ◽

Refinement Method ◽

Application Potential

Abstract Bismuth niobate (BiNbO4) has attracted attention as a low-fired ceramics with promising microwave application potential. BiNbO4 ceramics was fabricated by mixed oxide method and sintered at temperature T<1000°C. As the sintering aids a small amount of CuO oxide was used. The crystalline structure of the ceramic samples was examined by X-ray diffraction method at room temperature. The Rietveld refinement method was used for analysis of diffraction data. As a result an influence of dopants on crystal structure of bismuth niobate (BiNbO4) ceramics was revealed. It was found that fabricated BiNbO4 ceramics adopted the orthorhombic symmetry (α-BiNbO4 phase, Pnna (52) space group). Small differences in elementary cell parameters were found.

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Physical-chemical and Biological Properties of Novel Resin-based Composites for Dental Applications

10.21203/rs.3.rs-1200166/v1 ◽

2022 ◽

Author(s):

Zuzanna Buchwald ◽

Mariusz Sandomierski ◽

Wojciech Smułek ◽

Maria Ratajczak ◽

Adam Patalas ◽

...

Keyword(s):

Mechanical Properties ◽

Dental Materials ◽

Biological Properties ◽

Potential Interaction ◽

X Ray ◽

Synthesis Of Nanoparticles ◽

Application Potential ◽

Conversion Depth ◽

Ft Ir ◽

Dental Applications

Abstract Insufficient mechanical properties of hydroxyapatite -based composites prompted the search for new and effective solutions for dental applications. To improve the mechanical properties without losing the remineralization potential, the use of hybrid fillers was proposed. The first of them was based on the formation of hydroxyapatite (HA) layer on the surface of SYLOID®244 silica. The second of the investigated fillers was created by simultaneous synthesis of nanoparticles from precursors of HA and silica. The obtained fillers were extensively characterized by spectral methods including X-ray Diffractometry (XRD), Fourier-Transform Infrared Spectroscopy (FT-IR), and X-ray fluorescence (XRF), as well as by Scanning Electron Microscopy (SEM)/Energy Dispersive Spectroscopy (EDS). Tests using probiotic microorganisms were an important part of the analysis, indicating that there was no potential interaction of the materials with microflora. The tests of degree of conversion, depth of cure, opacity, sorption, solubility, flexural and compressive strength, and the remineralizing potential also showed that the composites with nano-sized silica/HA showed better mechanical properties than the composites with HA alone or commercial silica and at the same time the remineralization remained at the desired level. Thus, the proposed composite has a high application potential in the creation of implants and dental materials.

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