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https://www.readbyqxmd.com/read/28539105/removal-of-sulfamethoxazole-and-diclofenac-from-water-strategies-involving-o3-and-h2o2
#1
Daniela S Gomes, Licínio M Gando-Ferreira, Rosa M Quinta-Ferreira, Rui C Martins
Diclofenac (DCF) and Sulfamethoxazole (SMX) are two of the most frequently detected pharmaceutical compounds in water and are hardly removed by biological treatment systems. The presence of H2O2 was investigated in the ozonation of these two compounds. Experiments were carried out with both using distillated water and secondary effluent from a municipal wastewater treatment plant (WWTP) spiked with pharmaceuticals. Chemical oxygen demand (COD) abatement rate improved when H2O2 was added at the beginning of the ozonation process and when the ozone inlet concentration increased, attaining a maximum value of 91% and simultaneously a lower ozone waste for a H2O2 initial concentration of 5 mM and an ozone inlet concentration of 20 g Nm(-3)...
May 25, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28538654/a-monitoring-system-for-laying-hens-that-uses-a-detection-sensor-based-on-infrared-technology-and-image-pattern-recognition
#2
Mauro Zaninelli, Veronica Redaelli, Fabio Luzi, Valentino Bontempo, Vittorio Dell'Orto, Giovanni Savoini
In Italy, organic egg production farms use free-range housing systems with a big outdoor area and a flock of no more than 500 hens. With additional devices and/or farming procedures, the whole flock could be forced to stay in the outdoor area for a limited time of the day. As a consequence, ozone treatments of housing areas could be performed in order to reduce the levels of atmospheric ammonia and bacterial load without risks, due by its toxicity, both for hens and workers. However, an automatic monitoring system, and a sensor able to detect the presence of animals, would be necessary...
May 24, 2017: Sensors
https://www.readbyqxmd.com/read/28535480/ozonation-of-the-oxybenzone-octinoxate-and-octocrylene-uv-filters-reaction-kinetics-absorbance-characteristics-and-transformation-products
#3
Zachary R Hopkins, Sebastian Snowberger, Lee Blaney
UV-filters (UVFs) are active ingredients in personal care products that protect skin from exposure to UV light. Environmentally-relevant concentrations of UVFs have recently been linked to toxicity in aquatic organisms, necessitating research into improved UVF removal in water/wastewater treatment. Here, we investigated ozonation of the three most commonly employed UVFs: octinoxate (OMC), octocrylene (OC), and oxybenzone (OXY). Specific second-order rate constants for UVF reaction with ozone were identified as follows: OMC, 5...
May 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28531953/priority-pesticides-abatement-by-advanced-water-technologies-the-case-of-acetamiprid-removal-by-ozonation
#4
A Cruz-Alcalde, C Sans, S Esplugas
With the aim of exploring treatment alternatives for priority insecticide acetamiprid (ACMP) abatement, the removal of this compound from water by ozonation was studied for the first time, paying special attention to the kinetic, mechanistic and toxicological aspects of the process. The second order rate constants of reactions between ACMP and both molecular ozone (O3) and hydroxyl radicals (OH) were determined to be 0.25M(-1)s(-1) and 2.1·10(9)M(-1)s(-1), respectively. On the basis of kinetic results, the degradation of ACMP during ozonation could be well-explained by the reactivity of this pesticide with OH...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28529300/yi-kwang-su-s-love-and-history-records-of-modern-hospital-under-the-japanese-colonial-period
#5
Byoung Hoon Lee
This article aims to evaluate and analyze the description of the modern hospital as history record, which appeared in YI Kwang Su's novel Love. This novel has mentioned in detail western style clinic, Bukgando Catholic hospital, tuberculosis sanitarium as its main space. Modern hospitals are depicted in the novel has a great significance in historical aspect as well as in literary aspect. The most data on modern hospital is laws, statistics and newspaper archives. These materials are a great help to understand the history and status of the modern hospital...
December 2016: Ŭi Sahak
https://www.readbyqxmd.com/read/28529151/comparison-of-ozone-and-photo-biomodulation-therapies-on-mental-nerve-injury-in-rats
#6
Türker Yücesoy, Nükhet Kütük, Dilek Günay Canpolat, Alper Alkan
PURPOSE: This study compared photo-biomodulation (PBM) and ozone therapy (OT) for mental nerve injury by counting Schwann cells (SCs) and fasciculated nerve branches and measuring fascicular nerve areas. MATERIALS AND METHODS: The effects of OT and PBM on mental nerve injury were evaluated. Mental nerves of 27 rats were partly sutured and allocated into 3 groups. Group 1 received no treatment, group 2 received OT, and group 3 received PBM. The number of fascicules beyond nerve branches and the number of SCs before and after nerve injury were evaluated histologically...
April 26, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28528771/comparison-of-residual-napl-source-removal-techniques-in-3d-metric-scale-experiments
#7
O Atteia, F Jousse, G Cohen, P Höhener
This study compared four treatment techniques for the removal of a toluene/n-decane as NAPL (Non Aqueous Phase Liquid) phase mixture in identical 1 cubic meter tanks filled with different kind of sand. These four treatment techniques were: oxidation with persulfate, surfactant washing with Tween80®, sparging with air followed by ozone, and thermal treatment at 80°C. The sources were made with three lenses of 26×26×6.5cm, one having a hydraulic conductivity similar to the whole tank and the two others a value 10 times smaller...
April 21, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28525709/sensory-and-behavioral-responses-of-a-model-fish-to-oil-sands-process-affected-water-with-and-without-treatment
#8
Megan Reichert, Brian Blunt, Tia Gabruch, Tanja Zerulla, Allison Ralph, Mohamed Gamal El-Din, Bruce R Sutherland, Keith Tierney
If oil sands process-affected water (OSPW) is to be returned to the environment, a desire is that it not adversely affect aquatic life. We investigated whether a relevant model fish (rainbow trout; Oncorhynchus mykiss) could detect OSPW using its olfactory sense (smell), and whether exposure to it would result in behavioural changes. We also investigated whether ozonation of OSPW, which lowers the concentration of organic compounds attributed with toxicity (naphthenic acids), would ameliorate any observed adverse effects...
May 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28525469/safety-and-efficacy-study-of-an-ozone-laser-combined-therapy-using-puncture-needle-in-the-treatment-of-patients-with-cervical-spondylosis
#9
Ke Gu, Yuqiu Yan, Wu Wei, Yan Li, Wenli Liu, Yang Guo, Long Yu
STUDY DESIGN AND METHODS: Fifty-eight patients with cervical spondylosis (CS) were treated with patented technology of ozone laser combined therapy using puncture needle between August 2008 and February 2010. Visual Analogue Scale (VAS) score changes before and 6 months after surgery and MacNab score criteria 6 months after surgery were analyzed. BACKGROUND AND OBJECTIVE: CS normally occurs over the age of 50 and broadly presents as either myelopathy or radiculopathy...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28521085/wrinkling-and-folding-on-patched-elastic-surfaces-modulation-of-the-chemistry-and-pattern-size-of-microwrinkled-surfaces
#10
Aurora Nogales, Adolfo Del Campo, Tiberio Ezquerra, Juan Rodriguez-Hernandez
An unconventional strategy is proposed that takes advantage of localized high-deformation areas, referred to as folded wrinkles, to produce microstructured elastic surfaces with precisely controlled pattern dimensions and chemical distribution. For that purpose, elastic PDMS substrates were pre-stretched to a different extent and oxidized in particular areas using a mask. When the stretching was removed and the PDMS substrate exhibited out-of-plane deformations that largely depend on the applied pre-stretching...
May 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28515631/water-and-air-ozone-treatment-as-an-alternative-sanitizing-technology
#11
REVIEW
M Martinelli, F Giovannangeli, S Rotunno, C M Trombetta, E Montomoli
AIMS: We investigated the effectiveness of ozone (aqueous and gaseous) treatment as an alternative sanitizing technology to common conventional disinfectants in reducing the microbial contamination of both water and air. METHODS: Ozone was added for 20 minutes to a well-defined volume of water and air by the system named "Ozonomatic(®)". The effectiveness of ozonation was determined by counting CFU/ m3 or ml of bacteria present in samples of air or water collected before (T0) and after (T1) the addition of ozone and comparing the microbial load of different bacteria present in ozonized and nonozonized samples...
March 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28512283/unusual-root-canal-irrigation-solutions
#12
Zahed Mohammadi, Hamid Jafarzadeh, Sousan Shalavi, Jun-Ichiro Kinoshita
Microorganisms and their by-products play a critical role in pulp and periradicular pathosis. Therefore, one of the main purposes of root canal treatment is disinfection of the entire system of the canal. This aim may be obtained using mechanical preparation, chemical irrigation, and temporary medication of the canal. For this purpose, various irrigation solutions have been advocated. Common root canal irrigants, such as sodium hypochlorite, chlorhexidine, and a mixture of tetracycline, acid, and detergent have been extensively reviewed...
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28511077/clinical-and-laboratory-parameters-predicting-a-requirement-for-the-reevaluation-of-growth-hormone-status-during-growth-hormone-treatment-retesting-early-in-the-course-of-gh-treatment
#13
Dogus Vuralli, E Nazli Gonc, Z Alev Ozon, Ayfer Alikasifoglu, Nurgun Kandemir
OBJECTIVE: We aimed to define the predictive criteria, in the form of specific clinical, hormonal and radiological parameters, for children with growth hormone deficiency (GHD) who may benefit from the reevaluation of GH status early in the course of growth hormone (GH) treatment. DESIGN AND METHODS: Two hundred sixty-five children with growth hormone deficiency were retested by GH stimulation at the end of the first year of GH treatment. The initial clinical and laboratory characteristics of those with a normal (GH≥10ng/ml) response and those with a subnormal (GH<10ng/ml) response were compared to predict a normal GH status during reassessment...
May 10, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28507834/clinical-and-radiological-improvement-following-ozone-disc-nucleolysis-a-case-report
#14
Sharad Ghatge, Pranav D Modi, Dhaval B Modi
The results of traditional open surgery for herniated intervertebral disc are often limited by complications and failed back surgery syndrome (FBSS). Over the past few decades, a considerable amount of research has been done in the field of minimally invasive procedures as a treatment option for herniated intervertebral disc disease. Ozone disc nucleolysis is one such procedure which has results equal to or better than traditional surgery with virtually no complications. A 27-year-old post-partum female presented to the clinic with acute onset of severe lower back pain radiating to the left lower limb for one month...
April 13, 2017: Curēus
https://www.readbyqxmd.com/read/28497134/enhanced-planar-perovskite-solar-cells-with-efficiency-exceeding-16-via-reducing-the-oxygen-vacancy-defect-state-in-titanium-oxide-electrode
#15
Yangyang Du, Hongkun Cai, Yunhao Wu, Zhixue Xing, Zhenglong Li, Jian Xu, Like Huang, Jian Ni, Juan Li, Jianjun Zhang
In this work, the influence of oxygen vacancy defect (OVD) in compact titanium oxide (c-TiO2) on the performance of planar perovskite solar cells (p-PSCs) is investigated, and the possible mechanisms are also proposed. To meet our objective, anatase c-TiO2 thin films with various OVD concentrations are prepared by changing the oxygen flux during the DC magnetron sputtering process and are characterized by the intensity of defect signals in the X-ray photoelectron spectra. We conclude that abundant OVDs can trigger an obviously increased majority carrier accumulation zone at the metal oxide/perovskite interface and enhanced capacitance, thereby greatly deteriorating photogenerated carrier collection efficiency...
May 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28496412/nitric-oxide-synthase-activity-correlates-with-ogg1-in-ozone-induced-lung-injury-animal-models
#16
Suqin Zhang, Jianhua Li, Yuqin Li, Yufeng Liu, Hongxiang Guo, Xiaoli Xu
Background: NO is an important cellular signaling molecule which is derived from L-arginine by nitric oxide synthase (NOS) and the effects of NOS signaling in lung injury is conflicting. The present study was designed to observe the effect of NOS and Arginase signaling in the occurrence and development of lung injury and its mechanism. Methods: An ozone-stressed lung injury animal model was established by exposure to 2.0 ppm O3 for 30 min every day for consecutive 12 day with or without the administration of NO precursor L-arginine or non-selective NOS inhibitor N-nitro-L-arginine methyl ester (L-NAME)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28490796/degradation-mechanisms-of-silver-nanowire-electrodes-under-ultraviolet-irradiation-and-heat-treatment
#17
Dong Chul Choo, Tae Whan Kim
We report the degradation mechanisms of the silver nanowire (Ag NW) electrodes that play a significantly important role in the stability of wearable and flexible devices. The degradation mechanisms behind the increase in the sheet resistances of Ag NW electrodes were clarified by investigating the variations in the structure and the chemical composition of the Ag NW electrodes caused by ultraviolet irradiation and thermal treatment. While the shapes of the Ag NWs were affected by melting during the thermal degradation process, the chemical composition of the polyvinylpyrrolidone protective layer on the surfaces of the Ag NWs was not changed...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28489941/triboelectric-nanogenerator-enhanced-nanofiber-air-filters-for-efficient-particulate-matter-removal
#18
Guang Qin Gu, Chang Bao Han, Cun Xin Lu, Chuan He, Tao Jiang, Zhen Liang Gao, Cong Ju Li, Zhong Lin Wang
We developed a high-efficiency rotating triboelectric nanogenerator (R-TENG) enhanced polyimide (PI) nanofiber air filter for particulate matter (PM) removal in ambient atmosphere. The PI electrospinning nanofiber film exhibited high removal efficiency for the PMs that have diameters larger than 0.5 μm. When the R-TENG is connected, the removal efficiency of the filter is enhanced, especially when the diameters of PM are smaller than 100 nm. The highest removal efficiency is 90.6% for particles with a diameter of 33...
May 10, 2017: ACS Nano
https://www.readbyqxmd.com/read/28485925/occurrence-and-ecotoxicological-effects-of-free-conjugated-and-halogenated-steroids-of-17%C3%AE-hydroxypregnanolone-and-pregnanediol-in-swiss-wastewater-and-surface-water
#19
Kun Zhang, Yanbin Zhao, Karl Fent
Apart from estrogens, the occurrence and ecotoxicity of steroids in the aquatic environment is poorly known. Here we analyzed 33 steroids, including estrogens, androgens, progestins, and glucocorticoids in hospital wastewaters, river water and in municipal wastewater treatment plant (WTP) influents and effluents at different sites in Switzerland. In addition, wastewater from different treatment steps of two WTPs with advanced treatment, such as ozonation or pulverized activated carbon, were analyzed to study the steroid's behavior during treatment...
May 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28482235/membrane-fouling-by-extracellular-polymeric-substances-after-ozone-pre-treatment-variation-of-nano-particles-size
#20
Wenzheng Yu, Dizhong Zhang, Nigel J D Graham
The application of ozone pre-treatment for ultrafiltration (UF) in drinking water treatment has been studied for more than 10 years, but its performance in mitigating or exacerbating membrane fouling has been inconclusive, and sometimes contradictory. To help explain this, our study considers the significance of the influent organic matter and its interaction with ozone on membrane fouling, using solutions of two representative types of extracellular polymeric substances (EPS), alginate and bovine serum albumin (BSA), and samples of surface water...
May 3, 2017: Water Research
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