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https://www.readbyqxmd.com/read/28938211/current-surface-ozone-concentrations-significantly-decrease-wheat-growth-yield-and-quality
#1
Håkan Pleijel, Malin C Broberg, Johan Uddling, Gina Mills
Tropospheric ozone is known to adversely affect crops and other vegetation. Most studies have focussed on the effects of elevated ozone levels vs. present ambient. We investigated the effect of present ambient surface ozone (O3) concentrations vs. preindustrial on a range of agronomically important response variables in field-grown wheat, using results from 33 experiments (representing 9 countries, 3 continents, 17 cultivars plus one set of 4 cultivars) having both charcoal filtered (CF) and non-filtered (NF) air treatments...
September 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28937889/clinical-evaluation-of-ozone-on-dentinal-lesions-in-young-permanent-molars-using-the-stepwise-excavation
#2
Osama Safwat, Mona Elkateb, Karin Dowidar, Omar El Meligy
AIM: To evaluate the clinical changes in dentin of deep carious lesions in young permanent molars, following ozone application with and without the use of a remineralizing solution, using the stepwise excavation. STUDY DESIGN: The sample included 162 first permanent immature molars, showing deep occlusal carious cavities that were indicated for indirect pulp capping. Teeth were divided into 2 main groups according to the method of ozone treatment. Each group was further subdivided equally into test and control subgroups...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28933154/superhydrophobic-substrates-from-off-the-shelf-laboratory-filter-paper-simplified-preparation-patterning-and-assay-application
#3
Lishen Zhang, Honoria Kwok, Xiaochun Li, Hua-Zhong Yu
Off-the-shelf laboratory filter paper of different pore-sizes and thicknesses can be modified with fluorine-free organosilanes to be superhydrophobic, patternable, and ready for quantitative assay applications. In particular, we have demonstrated that cellulose filter paper treated with a binary hexane solution of short (methyltrichlorosilane, MTS) and long (octadecyltrichlorosilane, OTS) organosilanes, exhibits remarkably high water contact angles (> 150 °) and low wetting hysteresis (~10 °). Beyond the optimized ratio between the two organosilanes, we have discovered that the thickness rather than the pore size dictates the resulting superhydrophobicity...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28926910/removal-of-selected-nitrogenous-heterocyclic-compounds-in-biologically-pretreated-coal-gasification-wastewater-bpcgw-using-the-catalytic-ozonation-process-combined-with-the-two-stage-membrane-bioreactor-mbr
#4
Hao Zhu, Yuxing Han, Wencheng Ma, Hongjun Han, Weiwei Ma
Three identical anoxic-aerobic membrane bioreactors (MBRs) were operated in parallel for 300 consecutive days for raw (R1), ozonated (R2) and catalytic ozonated (R3) biologically pretreated coal gasification wastewater (BPCGW) treatment. The results demonstrated that catalytic ozonation process (COP) applied asa pretreatment remarkably improved the performance of the unsatisfactory single MBR. The overall removal efficiencies of COD, NH3-N and TN in R3 were 92.7%, 95.6% and 80.6%, respectively. In addition, typical nitrogenous heterocyclic compounds (NHCs) of quinoline, pyridine and indole were completely removed in the integrated process...
September 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28926363/blood-pressure-measurements-over-thin-and-thick-sleeves-in-the-frail-elderly
#5
Sachiko Ozone, Mikiya Sato, Ayumi Takayashiki, Takuya Sato, Aya Matsushita, Hisashi Yoshimoto, Tetsuhiro Maeno
OBJECTIVE: Blood pressure (BP) measurement is recommended on bare arms, but undressing the arms for BP measurements is often difficult for frail elderly individuals. We aimed to assess the accuracy of BP measurements over arms with thin and thick clothing among the frail elderly. PARTICIPANTS AND METHODS: This is a cross-sectional study. Individuals aged 65 years or older were recruited from three long-term care facilities in Japan between April and May 2016. The main outcome measures were BP measurements (a) on a bare arm, (b) over a thin shirt, (c) over a thin shirt and a cardigan, and (d) over the sleeve of a thin shirt and a cardigan rolled up to the elbow...
September 18, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28925753/ozone-partially-decreases-axonal-and-myelin-damage-in-an-experimental-sciatic-nerve-injury-model
#6
Zahir Kızılay, Nesibe Kahraman Çetin, Mehran Aksel, Burçin İrem Abas, Serdar Aktaş, Haydar Ali Erken, Abdullah Topçu, Ali Yılmaz, Cigdem Yenisey
AIM: To investigate the effects of ozone in experimental acute sciatic nerve injury. MATERIAL AND METHODS: Twenty-eight male rats were divided into four groups (n = 7): control (C), ozone (O), injury (SNI), and treatment with ozone after injury (SNI + Ozone). Sciatic nerve injury was generated by compressing the right sciatic nerve for 90 s using a Yasargil aneurysm clip in groups SNI and SNI + Ozone. A 70 µg/ml concentration of ozone was given four times (once a day at 1st, 24th, 48th, and 72th h) at a dose of 0...
September 19, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28923722/high-doses-of-ethylenediurea-edu-as-soil-drenches-did-not-increase-leaf-n-content-or-cause-phytotoxicity-in-willow-grown-in-fertile-soil
#7
Evgenios Agathokleous, Elena Paoletti, William J Manning, Mitsutoshi Kitao, Costas J Saitanis, Takayoshi Koike
Ground-level ozone (O3) levels are nowadays elevated in wide regions of the Earth, causing significant effects on plants that finally lead to suppressed productivity and yield losses. Ethylenediurea (EDU) is a chemical compound which is widely used in research projects as phytoprotectant against O3 injury. The EDU mode of action remains still unclear, while there are indications that EDU may contribute to plants with nitrogen (N) when the soil is poor in N and the plants have relatively small leaf area. To reveal whether the N content of EDU acts as a fertilizer to plants when the soil is not poor in N and the plants have relatively large total plant leaf area, willow plants (Salix sachalinensis Fr...
September 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28914248/comparative-evaluation-of-clinical-and-radiological-success-of-zinc-oxide-ozonated-oil-modified-3mix-mp-antibiotic-paste-and-vitapex-as-treatment-options-in-primary-molars-requiring-pulpectomy-an-in-vivo-study
#8
Divya Doneria, Seema Thakur, Parul Singhal, Deepak Chauhan
OBJECTIVES: The aim of this study was to evaluate the clinical and radiographic success of zinc oxide-ozonated oil (ZnO-OO), modified 3Mix antibiotic paste, and Vitapex in treatment of primary molars requiring pulpectomy. METHODS: Sixty-four primary molars of forty three children aged between 4 and 8 years with pulpally involved primary molars requiring root canal procedures were treated with ZnO-OO, modified 3Mix-MP paste, and Vitapex. The subjects were followed up clinically at 1, 6, and 12 months whereas radiographically at 6 and 12 months, respectively...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28910071/a-simple-incl3-doped-pedot-pss-and-uv-ozone-treatment-strategy-external-quantum-efficiency-up-to-21-for-solution-processed-organic-light-emitting-devices-with-a-thermally-activated-delayed-fluorescence-emitter
#9
Tao Zhou, Guohua Xie, Shaolong Gong, Manli Huang, Jiajia Luo, Chuluo Yang
A low-cost and easy-processed scheme for solution processed organic light-emitting devices (OLEDs) was provided to overcome the flaws of poly(styrene sulfonic acid)-doped poly(3,4-ethylenedioxythiphene) (PEDOT:PSS) together with the indium tin oxide (ITO) anode. The modified PEDOT:PSS with higher work function (5.66 eV), higher conductivity and more efficient hole injecting ability was obtained by simply mixing the aqueous PEDOT:PSS with InCl3 and then consecutive ultraviolet-ozone treatment. The simply structured and solution-processed OLEDs with our modified PEDOT:PSS achieved very high external quantum efficiency of 21...
September 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28903093/chlorination-chloramination-and-ozonation-of-carbamazepine-enhance-cytotoxicity-and-genotoxicity-multi-endpoint-evaluation-and-identification-of-its-genotoxic-transformation-products
#10
Yingnan Han, Mei Ma, Na Li, Rui Hou, Chao Huang, Yoshimitsu Oda, Zijian Wang
Investigations have focused on the removal and transformation of pharmaceuticals during drinking water and wastewater treatment. In the present study, we investigated for the first time the changes of the cytotoxicity and genotoxicity based on different modes of action (MoAs) during chlorination, chloramination and ozonation processes of the anti-epileptic drug carbamazepine (CBZ). The results illustrated that ozonation enhanced the cytotoxicity and the chromosome damage effects on CHO-K1 cells detected by cytokinesis-block micronucleus (CBMN) assay based on high-content screening technique, though ozonation showed the highest removal efficiency for CBZ...
September 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28898949/efficiencies-and-mechanisms-of-zsm5-zeolites-loaded-with-cerium-iron-or-manganese-oxides-for-catalytic-ozonation-of-nitrobenzene-in-water
#11
Chunmao Chen, Xin Yan, Brandon A Yoza, Tingting Zhou, Yang Li, Yali Zhan, Qinghong Wang, Qing X Li
Discharge of industrial wastewater causes water pollution. It is therefore necessary to treat wastewater prior to discharge. Catalytic ozonation processes (COP) using ZSM5 zeolites loaded with metallic (Ce, Fe, or Mn) oxides to remove nitrobenzene from water were investigated. The total organic carbon (TOC) removal by the COP treatment with NaZSM5-38, HZSM5-38, and NaZSM5-100 were increased by 6.7%, 23.1%, and 19.8%, respectively, in comparison with single ozonation efficiency (39.2%). The loadings of Ce, Fe, or Mn oxides increased the catalytic activity relative to ZSM5 zeolites alone...
September 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898779/ozone-cathode-microbial-desalination-cell-an-innovative-option-to-bioelectricity-generation-and-water-desalination
#12
Abdolmajid Gholizadeh, Ali Asghar Ebrahimi, Mohammad Hossein Salmani, Mohammad Hassan Ehrampoush
Microbial desalination cell (MDC) is a new approach of water desalination methods, which is based on ionic species removal from water in proportion to the electric current generated by bacteria. However, the low current generation and insufficient deionization in this technology have created challenges to improve the process. Here, the performance of MDC using ozone as a new electron acceptor (O3-MDC) was evaluated versus another operated independently with oxygen (O2-MDC). Results showed the maximum open-circuit voltages of 628 and 1331 mV for 20 g L(-1) NaCl desalination in O2-MDC and O3-MDC, respectively...
September 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28892768/advanced-oxidation-and-disinfection-processes-for-onsite-net-zero-greywater-reuse-a-review
#13
REVIEW
Lucien W Gassie, James D Englehardt
Net-zero greywater (NZGW) reuse, or nearly closed-loop recycle of greywater for all original uses, can recover both water and its attendant hot-water thermal energy, while avoiding the installation and maintenance of a separate greywater sewer in residential areas. Such a system, if portable, could also provide wash water for remote emergency health care units. However, such greywater reuse engenders human contact with the recycled water, and hence superior treatment. The purpose of this paper is to review processes applicable to the mineralization of organics, including control of oxidative byproducts such as bromate, and maintenance of disinfection consistent with potable reuse guidelines, in NZGW systems...
August 30, 2017: Water Research
https://www.readbyqxmd.com/read/28886976/the-degradation-processes-of-refractory-substances-in-nanofiltration-concentrated-leachate-using-micro-ozonation
#14
Hui Wang, Yunhai Wang, Ziyang Lou, Nanwen Zhu, Haiping Yuan
Concentrated leachate (CL) is the byproduct of leachate treated by the membrane separation unit after bio-treatment processes, and contains many humic-like substances. Ozonation processes were applied and optimized for the further removal of those refractory matters in this work. Micro-bubble ozonation (MB-O3) possessed the best performance, and 76.0% and 69.9% of COD and TOC were found to be removed under the optimum conditions with ozone dosage of 2.4g/L, initial pH of 9 and reaction time of 120min. The reaction rate k in MB-O3 was 0...
September 5, 2017: Waste Management
https://www.readbyqxmd.com/read/28886552/removal-of-napl-from-columns-by-oxidation-sparging-surfactant-and-thermal-treatment
#15
F Jousse, O Atteia, P Höhener, G Cohen
In this paper, four treatment techniques commonly applied to Volatile Organic Compounds (VOC) removal from soil are compared in column experiments with pure sand containing a residual Light Non-Aqueous Phase Liquid (L-NAPL) contamination. Oxidation is tested through the injection of Fenton reagent, with persulfate, and combined with sparging with the injection of ozone. Surfactant treatment was conducted at low flow rates with Tween(®)80. Sparging was conducted by air injection but at a low flow rate of 1 mL min(-1)...
September 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28886142/effects-of-ozone-exposure-on-human-epithelial-adenocarcinoma-and-normal-fibroblasts-cells
#16
Anna Poma, Sabrina Colafarina, Eleonora Aruffo, Osvaldo Zarivi, Antonella Bonfigli, Sebastiano Di Bucchianico, Piero Di Carlo
Previous studies show variable ozone cytotoxicity and genotoxicity in cell cultures, laboratory animals and humans directly exposed to tropospheric ozone. The aim of this study was therefore to investigate and compare the cyto and genotoxic effects of ozone using adenocarcinoma human alveolar basal epithelial cells A549 and normal human fibroblasts Hs27. A cell culture chamber with controlled atmosphere (a simulation reactor) was built to inject a flow of 120 ppb of ozone, which is two times the threshold value for the protection of human health, fixed by the EU legislation...
2017: PloS One
https://www.readbyqxmd.com/read/28881273/investigating-the-androgenic-activity-of-ozonation-transformation-products-of-testosterone-and-androstenedione
#17
Paul Westlund, Siavash Isazadeh, Viviane Yargeau
This study investigates the impact of ozonation on the concentration of two androgen steroid hormones, testosterone and androstenedione, and on androgenic activity as measured using the YAS assay. While these compounds are remarkably similar in chemical structure and showed comparable removal profiles in the presence and absence of a hydroxyl scavenger (isopropanol), large differences between percent removal of target compounds using chemical analysis and percent removal of bioactivity was observed when small ozone doses were applied...
August 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28880814/investigation-of-full-scale-ozonation-at-a-municipal-wastewater-treatment-plant-using-a-toxicity-based-evaluation-concept
#18
Fabian Itzel, Linda Gehrmann, Helena Bielak, Paul Ebersbach, Andrea Boergers, Heinrich Herbst, Christian Maus, Anne Simon, Elke Dopp, Monika Hammers-Wirtz, Torsten C Schmidt, Jochen Tuerk
Effluents from municipal wastewater treatment plants (WWTPs) are known to be point sources of micropollutants for surface waters. The aim of this study was to examine a reconstructed full-scale ozonation equipped with a pump-injector system for ozone (O3) dosage and a fluidized moving-bed reactor as biological posttreatment at a municipal WWTP utilizing an effect-directed approach. This approach consists of chemical analysis in combination with toxicological tests for the assessment of treatment efficiency of the plant...
September 7, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28877950/effects-of-complex-interventions-in-skin-cancer-prevention-and-treatment-protocol-for-a-mixed-method-systematic-review-with-qualitative-comparative-analysis
#19
Karolina Beifus, Eckhard Breitbart, Juliane Köberlein-Neu
INTRODUCTION: Occurring from ultraviolet radiation combined with impairing ozone levels, uncritical sun exposure and use of tanning beds an increasing number of people are affected by different types of skin cancer. But preventive interventions like skin cancer screening are still missing the evidence for effectiveness and therefore are criticised. Fundamental for an appropriate course of action is to approach the defined parameters as measures for effectiveness critically. A prerequisite should be the critical application of used parameter that are defined as measures for effectiveness...
September 5, 2017: BMJ Open
https://www.readbyqxmd.com/read/28876244/the-economic-pre-treatment-of-coal-mine-drainage-water-with-caustic-and-ozone
#20
B H Boyden, L Nador, S Addleman, L Jeston
Coal mine drainage waters are low in pH with varying amounts of iron and manganese and are generally brackish. The Austar Coal Mine in NSW, Australia, sought alternatives to their current lime dosing as the pre-treatment before the downstream reverse osmosis plant. Undesirable operating aspects of the current system include manganese and gypsum scaling/fouling, the need for anti-scalants and reduced water recovery. Thirteen processes for acid mine drainage were initially considered. The preferred process of caustic and ozone for Mn(II) oxidation was pilot tested at up to 0...
September 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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