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https://www.readbyqxmd.com/read/28447776/investigation-of-the-changes-in-electronic-properties-of-nickel-oxide-niox-due-to-uv-ozone-treatment
#1
Raisul Islam, Gang Chen, Pranav Ramesh, Junkyo Suh, Nobi Fuchigami, Donovan Lee, Karl A Littau, Kurt Weiner, Reuben T Collins, Krishna C Saraswat
Drastic reduction in nickel oxide (NiOx) film resistivity and ionization potential is observed when subjected to ultraviolet (UV)/ ozone (O3) treatment. X-ray photoemission spectroscopy suggests that UV/O3 treatment changes the film stoichiometry by introducing Ni vacancy defects. Oxygen-rich NiOx having Ni vacancy defects behaves as a p type semiconductor. Therefore, in this work, a simple and effective technique to introduce doping in NiOx is shown. Angle resolved XPS reveals that the effect of UV/O3 treatment does not only alter the film surface property, but also introduces oxygen-rich stoichiometry throughout the depth of the film...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28447450/band-bending-of-ga-polar-gan-interfaced-with-al2o3-through-ultraviolet-ozone-treatment
#2
Kwangeun Kim, Jae Ha Ryu, Jisoo Kim, Sang June Cho, Dong Liu, Jeongpil Park, In-Kyu Lee, Baxter Moody, Weidong Zhou, John Albrecht, Zhenqiang Ma
Understanding the band bending at the interface of GaN/dielectric under different surface treatment conditions is critically important for device design, device performance, and device reliability. The effects of ultraviolet/ozone (UV/O3) treatment of the GaN surface on the energy band bending of atomic-layer-deposition (ALD) Al2O3 coated Ga-polar GaN were studied. The UV/O3 treatment and post-ALD anneal can be used to effectively vary the band bending, valence band offset, conduction band offset, and interface dipole at the Al2O3/GaN interfaces...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28446599/acute-respiratory-distress-syndrome
#3
REVIEW
Marco Confalonieri, Francesco Salton, Francesco Fabiano
Since its first description, the acute respiratory distress syndrome (ARDS) has been acknowledged to be a major clinical problem in respiratory medicine. From July 2015 to July 2016 almost 300 indexed articles were published on ARDS. This review summarises only eight of them as an arbitrary overview of clinical relevance: definition and epidemiology, risk factors, prevention and treatment. A strict application of definition criteria is crucial, but the diverse resource-setting scenarios foster geographic variability and contrasting outcome data...
June 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28438284/intradiscal-o2o3-rationale-injection-technique-short-and-long-term-outcomes-for-the-treatment-of-low-back-pain-due-to-disc-herniation
#4
REVIEW
Francesco Giurazza, Gianluigi Guarnieri, Kieran J Murphy, Mario Muto
The management of low back pain should always start with a conservative approach; however, when it fails, intervention is required and at that moment the most appropriate choice remains unclear. Before invasive surgery, minimally invasive techniques can be adopted. In European trials and in a trans-Canadian clinical trial 03 ozone has been used successfully. In total over 50,000 patients have been treated safely. Ozone is a gas normally present in the atmosphere with potent oxidizing power; it has been used for percutaneous intradiscal injection combined with oxygen (O2O3) at very low concentrations for 15 years in Europe...
May 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/28436426/stretchable-ag-electrodes-with-mechanically-tunable-optical-transmittance-on-wavy-patterned-pdms-substrates
#5
Eun-Hye Ko, Hyo-Joong Kim, Sang-Mok Lee, Tae-Woong Kim, Han-Ki Kim
We report on semi-transparent stretchable Ag films coated on a wavy-patterned polydimethylsiloxane (PDMS) substrate for use as stretchable electrodes for stretchable and transparent electronics. To improve the mechanical stretchability of the Ag films, we optimized the wavy-pattern of the PDMS substrate as a function of UV-ozone treatment time and pre-strain of the PDMS substrate. In addition, we investigated the effect of the Ag thickness on the mechanical stretchability of the Ag electrode formed on the wavy-patterned PDMS substrate...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28433880/predicting-trace-organic-compound-attenuation-by-ozone-oxidation-development-of-indicator-and-surrogate-models
#6
Minkyu Park, Tarun Anumol, Kevin D Daniels, Shimin Wu, Austin D Ziska, Shane A Snyder
Ozone oxidation has been demonstrated to be an effective treatment process for the attenuation of trace organic compounds (TOrCs); however, predicting TOrC attenuation by ozone processes is challenging in wastewaters. Since ozone is rapidly consumed, determining the exposure times of ozone and hydroxyl radical proves to be difficult. As direct potable reuse schemes continue to gain traction, there is an increasing need for the development of real-time monitoring strategies for TOrC abatement in ozone oxidation processes...
April 10, 2017: Water Research
https://www.readbyqxmd.com/read/28429404/air-pollution-weight-loss-and-metabolic-benefits-of-bariatric-surgery-a-potential-model-for-study-of-metabolic-effects-of-environmental-exposures
#7
R Ghosh, W J Gauderman, H Minor, H A Youn, F Lurmann, K R Cromar, L Chatzi, B Belcher, C R Fielding, R McConnell
BACKGROUND: Emerging experimental evidence suggests that air pollution may contribute to development of obesity and diabetes, but studies of children are limited. OBJECTIVES: We hypothesized that pollution effects would be magnified after bariatric surgery for treatment of obesity, reducing benefits of surgery. METHODS: In 75 obese adolescents, excess weight loss (EWL), high-density lipoprotein (HDL) cholesterol, triglycerides, alkaline phosphatase (ALP) and hemoglobin A1c (HbA1c ) were measured prospectively at baseline and following laparoscopic adjustable gastric banding (LAGB)...
April 21, 2017: Pediatric Obesity
https://www.readbyqxmd.com/read/28427649/hydrodynamic-cavitation-in-combination-with-the-ozone-hydrogen-peroxide-and-the-uv-based-advanced-oxidation-processes-for-the-removal-of-natural-organic-matter-from-drinking-water
#8
Matej Čehovin, Alojz Medic, Jens Scheideler, Jörg Mielcke, Achim Ried, Boris Kompare, Andreja Žgajnar Gotvajn
Natural organic matter in drinking water is causing concern especially due to the formation of disinfection by-products (DBPs) by chlorine, as these are proven to have adverse health effects on consumers. In this research, humic acid was used as a source of dissolved organic carbon (DOC) in drinking water (up to 3mgL(-1)). The efficiency of DOC removal was studied by applying O3, H2O2/O3, H2O2/UV and O3/UV advanced oxidation processes (AOPs) alone and combined with hybrid hydrodynamic cavitation (HC), generated by an orifice plate, as this technology recently shows promising potential for the treatment of water, containing recalcitrant organic substances...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28412550/the-competition-between-cathodic-oxygen-and-ozone-reduction-and-its-role-in-dictating-the-reaction-mechanisms-of-an-electro-peroxone-process
#9
Guangsen Xia, Yujue Wang, Bin Wang, Jun Huang, Shubo Deng, Gang Yu
Previous studies indicate that effective generation of hydrogen peroxide (H2O2) from cathodic oxygen (O2) reduction is critical for the improved water treatment performance (e.g., enhanced pollutant degradation and reduced bromate formation) during the electro-peroxone (E-peroxone) process (a combined process of electrolysis and ozonation). However, undesired reactions (e.g., O3, H2O2, and H2O reductions) may occur in competition with O2 reduction at the cathode. To get a better understanding of how these side reactions would affect the process, this study investigated the cathodic reaction mechanisms during electrolysis with O2/O3 gas mixture sparging using various electrochemical techniques (e...
April 4, 2017: Water Research
https://www.readbyqxmd.com/read/28409426/ethylenediurea-as-a-potential-tool-in-evaluating-ozone-phytotoxicity-a-review-study-on-physiological-biochemical-and-morphological-responses-of-plants
#10
Supriya Tiwari
Present-day climate change scenario has intensified the problem of continuously increasing ground-level ozone (O3), which is responsible for causing deleterious effects on growth and development of plants. Studies involving use of ethylenediurea (EDU), a chemical with antiozonant properties, have given some promising results in evaluating O3 injury in plants. The use of EDU is especially advantageous in developing countries which face a more severe problem of ground-level O3, and technical O3-induced yield loss assessment techniques like open-top chambers cannot be used...
April 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28408188/investigation-and-risk-evaluation-of-the-occurrence-of-carbamazepine-oxcarbazepine-their-human-metabolites-and-transformation-products-in-the-urban-water-cycle
#11
Elena Brezina, Carsten Prasse, Johannes Meyer, Harald Mückter, Thomas A Ternes
Trace organic contaminants such as pharmaceuticals, personal care products and industrial chemicals are frequently detected in the urban water cycle, including wastewater, surface water and groundwater, as well as drinking water. These also include human metabolites (HMs), which are formed in the human body and then excreted via urine or feces, as well as transformation products (TPs) formed in engineered treatment systems and the aquatic environment. In the current study, the occurrence of HMs as well as their TPs of the anticonvulsants carbamazepine (CBZ) and oxcarbazepine (OXC) were investigated using LC tandem MS in effluents of wastewater treatment plants (WWTPs), surface water and groundwater...
April 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28402833/understanding-the-similarities-and-differences-between-ozone-and-peroxone-in-the-degradation-of-naphthenic-acids-comparative-performance-for-potential-treatment
#12
Mohamed N A Meshref, Nikolaus Klamerth, Md Shahinoor Islam, Kerry N McPhedran, Mohamed Gamal El-Din
Ozonation at high doses is a costly treatment for oil sands process-affected water (OSPW) naphthenic acids (NAs) degradation. To decrease costs and limit doses, different peroxone (hydrogen peroxide/ozone; H2O2:O3) processes using mild-ozone doses of 30 and 50 mg/L were investigated. The degradation efficiency of Ox-NAs (classical (O2-NAs) + oxidized NAs) improved from 58% at 30 mg/L ozone to 59%, 63% and 76% at peroxone (1:1), 50 mg/L ozone, and peroxone (1:2), respectively. Suppressing the hydroxyl radical (•OH) pathway by adding tert-butyl alcohol did significantly reduce the degradation in all treatments, while molecular ozone contribution was around 50% and 34% for O2-NAs and Ox-NAs, respectively...
March 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/28396926/comparison-of-microbial-community-shifts-in-two-parallel-multi-step-drinking-water-treatment-processes
#13
Jiajiong Xu, Wei Tang, Jun Ma, Hong Wang
Drinking water treatment processes remove undesirable chemicals and microorganisms from source water, which is vital to public health protection. The purpose of this study was to investigate the effects of treatment processes and configuration on the microbiome by comparing microbial community shifts in two series of different treatment processes operated in parallel within a full-scale drinking water treatment plant (DWTP) in Southeast China. Illumina sequencing of 16S rRNA genes of water samples demonstrated little effect of coagulation/sedimentation and pre-oxidation steps on bacterial communities, in contrast to dramatic and concurrent microbial community shifts during ozonation, granular activated carbon treatment, sand filtration, and disinfection for both series...
April 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28394634/ozone-in-the-food-industry-principles-of-ozone-treatment-mechanisms-of-action-and-applications-an-overview
#14
Agnieszka Joanna Brodowska, Agnieszka Nowak, Krzysztof Śmigielski
The food contamination issue requires continuous control of food at each step of the production process. High quality and safety of products are equally important factors in the food industry. They may be achieved with several, more or less technologically advanced methodologies. In this work, we review the role, contribution, importance, and impact of ozone as a decontaminating agent used to control and eliminate the presence of microorganisms in food products as well as to extend their shelf-life and remove undesirable odors...
April 10, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28386893/cheap-non-toxic-non-corrosive-method-of-glass-cleaning-evaluated-by-contact-angle-afm-and-sem-edx-measurements
#15
Tania Dey, Daragh Naughton
Glass surface cleaning is the very first step in advanced coating deposition and it also finds use in conserving museum objects. However, most of the wet chemical methods of glass cleaning use toxic and corrosive chemicals like concentrated sulfuric acid (H2SO4), piranha (a mixture of concentrated sulfuric acid and 30% hydrogen peroxide), and hydrogen fluoride (HF). On the other hand, most of the dry cleaning techniques like UV-ozone, plasma, and laser treatment require costly instruments. In this report, five eco-friendly wet chemical methods of glass cleaning were evaluated in terms of contact angle (measured by optical tensiometer), nano-scale surface roughness (measured by atomic force microscopy or AFM), and elemental composition (measured by energy dispersive x-ray spectroscopy or SEM-EDX)...
April 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28377599/chemically-different-non-thermal-plasmas-target-distinct-cell-death-pathways
#16
Oleg Lunov, Vitalii Zablotskii, Olexander Churpita, Mariia Lunova, Milan Jirsa, Alexandr Dejneka, Šárka Kubinová
A rigorous biochemical analysis of interactions between non-thermal plasmas (NTPs) and living cells has become an important research topic, due to recent developments in biomedical applications of non-thermal plasmas. Here, we decouple distinct cell death pathways targeted by chemically different NTPs. We show that helium NTP cells treatment, results in necrosome formation and necroptosis execution, whereas air NTP leads to mTOR activation and autophagy inhibition, that induces mTOR-related necrosis. On the contrary, ozone (abundant component of air NTP) treatment alone, exhibited the highest levels of reactive oxygen species production leading to CypD-related necrosis via the mitochondrial permeability transition...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28376500/suppression-of-retinal-neovascularization-by-anti-ccr3-treatment-in-an-oxygen-induced-retinopathy-model-in-mice
#17
Shuichiro Hirahara, Miho Nozaki, Masaharu Ohbayashi, Norio Hasegawa, Daisuke Ozone, Yuichiro Ogura
PURPOSE: To investigate the association between retinal neovascularization and the CC chemokine receptor-3 (CCR3) in a mouse model of oxygen-induced retinopathy (OIR). METHODS: An OIR model in C57BL/6J mice was used as a retinal neovascularization model. An enzyme-linked immunosorbent assay was performed to evaluate the chronological change in vascular endothelial growth factor A (VEGF-A) and eotaxin expressions. CCR3 and VEGF subtype expression in the retina was examined using real-time RT-PCR, and CCR3, eotaxin, VEGF-A, and CD31 expression was examined immunohistochemically...
April 5, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28376353/expressing-air-pollution-induced-health-related-externalities-in-physical-terms-with-the-help-of-dalys
#18
Till M Bachmann, Jonathan van der Kamp
The unintended impacts of industrial activity on human health and the environment have regularly been assessed and monetised (referred to as "external costs"). External costs are, however, a rather abstract aggregate so that decision makers cannot easily relate them to tangible impacts. At the same time, physical health impact indicators have different units that cannot readily be compared and communicated in a joint way. To support better informed decisions at policy or company level, we propose and demonstrate a way to facilitate communication on non-monetized, that is, physical health indicators quantified in studies...
June 2017: Environment International
https://www.readbyqxmd.com/read/28372748/research-on-the-degradation-mechanism-of-pyridine-in-drinking-water-by-dielectric-barrier-discharge
#19
Yang Li, Rongjie Yi, Chengwu Yi, Biyun Zhou, Huijuan Wang
Pyridine, an important chemical raw material, is widely used in industry, for example in textiles, leather, printing, dyeing, etc. In this research, a dielectric barrier discharge (DBD) system was developed to remove pyridine, as a representative type of nitrogen heterocyclic compound in drinking water. First, the influence of the active species inhibitors tertiary butanol alcohol (TBA), HCO3(-), and CO3(2-) on the degradation rate of pyridine was investigated to verify the existence of active species produced by the strong ionization discharge in the system...
March 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28371770/occurrence-of-antibiotic-resistance-genes-and-mobile-genetic-elements-in-enterococci-and-genomic-dna-during-anaerobic-digestion-of-pharmaceutical-waste-sludge-with-different-pretreatments
#20
Juan Tong, XueTing Lu, JunYa Zhang, Qianwen Sui, Rui Wang, Meixue Chen, Yuansong Wei
Pharmaceutical waste sludge harbors large amounts of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs), and it is necessary to study the reduction of ARGs and MGEs during sludge treatment. Therefore, the antibiotic resistance phenotypes and genotypes of enterococci, and the ARGs and MGEs in genomic DNA were investigated during anaerobic digestion (AD) with microwave (MW), thermal hydrolysis (TH) and ozone pretreatment. Results showed that sludge pretreatment increased the occurrence of the resistance phenotypes and genotypes of enterococci...
March 22, 2017: Bioresource Technology
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