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https://www.readbyqxmd.com/read/28102951/direct-and-fast-measurement-of-ct-beam-filter-profiles-with-simultaneous-geometrical-calibration
#1
Kai Yang, Xinhua Li, X George Xu, Bob Liu
PURPOSE: To accurately measure the beam filter profiles from a variety of CT scanner models and to provide reference data for Monte Carlo simulations of CT scanners. METHODS: This study proposed a new method to measure CT beam filter profiles using a linear-array x-ray detector (X-Scan 0.8f3-512; Detection Technology Inc., Espoo, Finland) under gantry rotation mode. A robust geometrical calibration approach was developed to determine key geometrical parameters by considering the x-ray focal spot location relative to the linear-array detector and the gantry's angular increment at each acquisition point...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28101943/stability-of-color-in-spanish-style-green-table-olives-pasteurized-and-stored-in-plastic-containers
#2
Antonio Higinio Sánchez, Antonio López-López, Víctor Manuel Beato, Antonio de Castro, Alfredo Montaño
BACKGROUND: There is an increasing interest in the use of pasteurizable plastic packaging by the olive industry. In order to investigate the change from traditional glass or varnished can containers to plastic packaging, the proper plastic material that is compatible with fermented olives while maintaining color quality during pasteurization treatment and storage must be selected. This work is focused on color stability in two distinct pasteurizable plastic containers with different oxygen permeability...
January 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28101715/cortex-and-amygdala-dependent-learning-and-nicotinic-acetylcholine-receptor-gene-expression-is-severely-impaired-in-mice-orally-treated-with-alcl3
#3
Syeda Mehpara Farhat, Aamra Mahboob, Touqeer Ahmed
Recent industrialization has increased human exposure to bio-available aluminum (Al). If more Al enters the brain than leaves, Al concentration will rise in the brain leading to neurodegenerative disorders. The aim of the present study was to determine Al concentration, neurodegeneration, and nicotinic acetylcholine receptor (nAChR) gene expression in the cortex and amygdala after oral ingestion of Al salt. The effect of Al on cortex- and amygdala-dependent learning and memory functions was also assessed. Mice were given AlCl3 (250 mg/kg) in drinking water for 42 days...
January 18, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28100359/-holmium-yttrium-aluminum-garnet-ho-yag-laser-lithotripsy-in-the-treatment-of-broncholithiasis
#4
Y Cheng, W Zhang, H Zhang, Y Liu, N Li, J Cao, G F Wang
Objective: To assess the effectiveness of Ho: YAG Laser in the treatment of broncholithiasis. Methods: We retrospectively reviewed the clinical data of 6 patients who underwent Ho: YAG Laser lithotripsy in Peking University First Hospital during May 2012 to October 2015. 4 females and 2 males, with a median age of 60 years, were enrolled. Among 6 patients, persistent cough(n=2), hemoptysis(n=2), recurrent pneumonia(n=2) were the main clinical symptoms. Broncholiths were found in the left side in 1 patient and right side in 5 patients...
January 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28098976/adsorption-neutralization-model-and-floc-growth-kinetics-properties-of-aluminum-coagulants-based-on-sips-and-boltzmann-equation
#5
Zhen Wu, Xian Zhang, Chunjiao Zhou, Jing-Lin Pang, Panyue P Zhang
Single-molecule aluminum salt AlCl3, medium polymerized polyaluminium chloride (PAC) and high polymerized polyaluminium chloride (HPAC) were prepared in laboratory. The characteristics and coagulation properties of these prepared aluminum salts were investigated. The Langmuir, Freundlich and Sips adsorption isotherms were firstly used to describe the adsorption neutralization process in coagulation, and the Boltzmann equation was used to fit the reaction kinetics of floc growth in flocculation. It was novel to find that the experimental data fitted well with the Sips and Boltzmann equation, and the significance of parameters in the equations was discussed simultaneously...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28097927/assessment-and-comparison-of-three-high-aluminum-fly-ash-utilization-scenarios-in-inner-mongolia-china-using-an-eco-efficiency-indicator
#6
Shuo Yang, Ling Lin, Shao Peng Li, Qiang Li, Xiu Teng Wang, Liang Sun
Utilization of fly ash is of great importance in China in the context of resource and environmental crises. Different fly ash utilization processes are proposed, and some have been practically applied. However, none of these fly ash utilization pathways has been evaluated comprehensively by integrating both environmental and economic perspectives. In this study, three high-aluminum fly ash utilization methods in Mongolia were assessed and compared based on the concept of eco-efficiency. The environmental assessment was conducted in accordance with life-cycle assessment principles, and a monetization-weighting approach was applied to obtain social willingness-to-pay as a reflection of environmental impact...
January 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28096353/high-coulombic-efficiency-aluminum-ion-battery-using-an-alcl3-urea-ionic-liquid-analog-electrolyte
#7
Michael Angell, Chun-Jern Pan, Youmin Rong, Chunze Yuan, Meng-Chang Lin, Bing-Joe Hwang, Hongjie Dai
In recent years, impressive advances in harvesting renewable energy have led to a pressing demand for the complimentary energy storage technology. Here, a high Coulombic efficiency (∼99.7%) Al battery is developed using earth-abundant aluminum as the anode, graphite as the cathode, and a cheap ionic liquid analog electrolyte made from a mixture of AlCl3 and urea in a 1.3:1 molar ratio. The battery displays discharge voltage plateaus around 1.9 and 1.5 V (average discharge = 1.73 V) and yielded a specific cathode capacity of ∼73 mAh g(-1) at a current density of 100 mA g(-1) (∼1...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095574/managing-occupational-irritant-contact-dermatitis-using-a-two-step-skincare-regimen-designed-to-prevent-skin-damage-and-support-skin-recovery
#8
Erika C von Grote, Kiruthi Palaniswarmy, Matthew H Meckfessel
Occupational irritant contact dermatitis (ICD) affecting the hands is a common and difficult-to-manage condition. Occupations that necessitate contact with harsh chemicals, use of alcohol-based disinfectants, and frequent hand washing elevate the risk of ICD. Management strategies that do not adequately prevent accumulated damage and repair skin, can develop into chronic dermatoses which negatively impact work productivity and quality of life. A 2-step skin-care regimen (Excipial Daily Protection Hand Cream (EP) and Excipial Rapid Repair Hand Cream (ER), Galderma Laboratories, L...
December 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28095562/the-efficacy-of-q-switched-nd-yag-1064-nm-laser-in-recalcitrant-macular-amyloidosis-a-case-report
#9
Nevil Khurana, Christine Urman
Macular amyloidosis typically presents as small, dusky-brown or greyish pigmented macules, the result of altered keratin deposition. Treatment of these hyperpigmented regions with topical and systemic therapies remains challenging, however Q-Switched neodymi- um-doped yttrium aluminum garnet (ND:YAG) laser has proven to be an effective treatment modality to reduce hyperpigmentation. In this case report we investigated the ef cacy of Q-Switched Nd:YAG laser treatment on a 34-year old woman with recalcitrant macular amyloidosis who failed to respond to over-the-counter bleaching creams...
November 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28095286/the-relations-between-polycyclic-aromatic-hydrocarbons-exposure-and-1-ohp-levels-as-a-biomarker-of-the-exposure
#10
Zuzana Klöslová, Marek Drímal, Karol Balog, Kvetoslava Koppová, Jarmila Dubajová
BACKGROUND: Polycyclic aromatic hydrocarbons (PAHs) are the products of incomplete combustion or pyrolysis of various organic materials. Their ubiquity in the environment leads to measurable levels of exposure. However, the exposure varies strongly between different regions in Europe. Some PAHs with four or more rings are suspected to be human carcinogens. Therefore, the occupational and/or environmental exposure to PAHs may cause a significant health risk. The aim of investigation is to evaluate current levels of PAH exposure in defined groups of workers...
December 2016: Central European Journal of Public Health
https://www.readbyqxmd.com/read/28094917/tuning-the-ignition-performance-of-a-micro-chip-initiator-by-integrating-various-al-moo3-rmfs-on-a-semiconductor-bridge
#11
Jianbing Xu, Yu Tai, Chengbo Ru, Ji Dai, Yinghua Ye, Ruiqi Shen, Peng Zhu
Reactive multilayer films (RMFs) can be integrated into semiconducting electronic structures with the use of microelectromechanical systems (MEMS) technology, and represent potential applications in the advancement of microscale energy-demanding systems. In this study, aluminum/ molybdenum trioxide (Al/MoO3) -based RMFs with different modulation periods were integrated on a semiconductor bridge (SCB) using a combination of image reversal lift-off process and magnetron sputtering technology. This produced an energetic semiconductor bridge (ESCB)-chip initiator with controlled ignition performance...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094238/evaporating-metal-nanocrystal-arrays
#12
Xue Zhang, James Joy, Chenwei Zhao, Jin-Ho Kim, Gustavo Fernandes, Jimmy Xu, James Valles
Anodic aluminum oxide (AAO) substrates with a self-ordered triangular array of nanopores provide the means to fabricate multiple forms of nano materials, such as nanowires and nanoparticles. This study focuses on nanostructures that emerge in thin films of metals thermally evaporated onto the surface of AAO. Previous work showed that films of different evaporated metals assume dramatically different structures, e.g. an ordered triangular array of nearly monodisperse nanoparticles forms for Lead(Pb) while a polycrystalline nanohoneycomb structure forms for Silver(Ag)...
January 17, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28094157/stabilization-of-tannery-sludge-by-co-treatment-with-aluminum-anodizing-sludge-and-phytotoxicity-of-end-products
#13
E Pantazopoulou, O Zebiliadou, M Mitrakas, A Zouboulis
A global demand for efficient re-utilization of produced solid wastes, which is based on the principles of re-use and recycling, results to a circular economy, where one industry's waste becomes another's raw material and it can be used in a more efficient and sustainable way. In this study, the influence of a by-product addition, such as aluminum anodizing sludge, on tannery waste (air-dried sludge) stabilization was examined. The chemical characterization of tannery waste leachate, using the EN 12457-2 standard leaching test, reveals that tannery waste cannot be accepted even in landfills for hazardous wastes, according to the EU Decision 2003/33/EC...
January 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28093070/clonidine-is-effective-for-the-treatment-of-primary-idiopathic-hyperhidrosis-and-hot-flushes-a-case-report
#14
Ahmed Albadrani
BACKGROUND: While primary hyperhidrosis can be seen in men, accompanying hot flushes is rarely seen in men. Primary hyperhidrosis is thought to be related to overactivity of the sympathetic nervous system while hot flushes are believed to be related to altered peripheral vascular reactivity and a narrowed thermoregulatory zone. CASE PRESENTATION: I report the case of a 29-year-old man of Arab origin who presented to a dermatology clinic with a complaint of generalized sweating, with heavier involvement of his inguinal region, axilla, and lower back...
January 17, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28092765/cytotoxic-genotoxic-and-mutagenic-evaluation-of-surface-waters-from-a-coal-exploration-region
#15
Cynthia Silva Porta, Débora Lemes Dos Santos, Hélio Vieira Bernardes, Bruno Corrêa Bellagamba, Anaí Duarte, Johnny Ferraz Dias, Fernanda Rabaioli da Silva, Mauricio Lehmann, Juliana da Silva, Rafael Rodrigues Dihl
Coal mining generates a considerable amount of waste, which is disposed of in piles or dams near mining sites. As a result, leachates may reach rivers and streams, promoting the wide dispersion of contaminants in solution and as particulate matter. The present study evaluated the cytotoxic, genotoxic, and mutagenic action of surface waters collected around a thermoelectric power plant and the largest mining area in Brazil (Candiota). Four sites in Candiota stream were selected, and samples were collected in winter and summer...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28091437/radiopacity-of-bulk-fill-flowable-resin-composite-materials
#16
T Yildirim, M K Ayar, M S Akdag, C Yesilyurt
OBJECTIVES: The purpose of this study was to evaluate the radiopacity of currently marketed bulk fill flowable dental composite materials (Beautifil Bulk Flowable, SDR Flow, Filtek Bulk Fill Flow, and x-tra Base Bulk Fill). MATERIALS AND METHODS: Six specimens of each material with a thickness of 1 mm were prepared, and digital radiographs were taken, using a CCD sensor along with an aluminum stepwedge and 1 mm-thick tooth slice. The mean gray level of each aluminum stepwedge and selected materials was measured, using the equal-density area tool of Kodak Dental Imaging software...
February 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28090766/gas-diffusion-barriers-prepared-by-spatial-atmospheric-pressure-plasma-enhanced-ald
#17
Lukas Hoffmann, Detlef Theirich, Sven Pack, Firat Kocak, Daniel Schlamm, Tim Hasselmann, Henry Fahl, André Räupke, Hassan Gargouri, Thomas Riedl
In this paper we report on aluminum oxide (Al2O3) gas permeation barriers prepared by spatial ALD (SALD) at atmospheric pressure. We compare the growth characteristics and layer properties using trimethylaluminium (TMA) in combination with an Ar/O2 remote atmospheric pressure plasma for different substrate velocities and different temperatures. The resulting Al2O3 films show ultra-low water vapor transmission rates (WVTR) on the order of 10-6 gm-2d-1. In notable contrast, plasma based layers already show good barrier properties at low deposition temperatures (75°C) while water based processes require a growth temperature above 100°C to achieve equally low WVTRs...
January 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28089089/-27-al-27-al-double-quantum-single-quantum-mas-nmr-applications-to-the-structural-characterization-of-microporous-materials
#18
REVIEW
Charlotte Martineau-Corcos, Jiri Dědeček, Francis Taulelle
In this paper, we review and illustrate applications, reported in the literature or used in our group, of (27)Al-(27)Al double-quantum single-quantum (DQ-SQ) MAS NMR experiments for the structural characterization of Al-containing microporous solids, namely zeolites, aluminophosphates and metal-organic frameworks. Information regarding the periodic frameworks or the localization of the various aluminum species in the materials are obtained from the analysis of the two-dimensional NMR spectra, which allows getting local structural details sometimes inaccessible from other characterization technique...
December 28, 2016: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/28089086/improved-pressurized-marinelli-beaker-measurements-of-radioactive-xenon-in-air
#19
Troy Robinson, Nick Mann, Tracy Houghton, Matthew Watrous, John Peterson, Paul Fabian, Pat Hipp, Mark Reavis, Francisco Fernandez
INL has shown that a Marinelli beaker geometry can be used for the measurement of radioactive xenon in air using an aluminum Marinelli. A carbon fiber Marinelli was designed and constructed to improve overall performance. This composite Marinelli can withstand sample pressures of 276bar and achieve approximately a 4x performance improvement in the minimum detectable concentrations (MDCs) and concentration uncertainties. The MDCs obtained during a 24h assay for (133)Xe, (131m)Xe, and (135)Xe are: 1.4, 13, and 0...
January 4, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28088849/effect-of-gallium-exposure-in-arabidopsis-thaliana-is-similar-to-aluminum-stress
#20
Hsin-Fang Chang, Shan-Li Wang, Kuo-Chen Yeh
Although gallium (Ga) is a rare element, it is widely used in semiconductor devices. Ga contamination of the environment has been found in semiconductor-producing countries. Here, the physiological and molecular impacts of Ga in the model plant Arabidopsis thaliana were investigated in medium culture. The primary symptom of Ga toxicity is inhibition of root growth. The increased production of malondialdehyde (MDA) suggests that Ga stress could cause oxidative damage in plants. Roots were the main Ga accumulating sites...
January 15, 2017: Environmental Science & Technology
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