ozone

摘要： Objective The exact biological mechanism whereby exposure to ambient ozone(O3)may contribute to clinical onset of cardiovascular events remains unclear.In this study,we aim to examine the impacts of O3 exposure on cardiac arrhythmias and potential pathways involved through autonomic dysfunction and myocardial injury.Methods Seventy-three non-smoking healthy adults were followed with 4 repeated measurements of 24-hour ambulatory arrhythmias,heart rate variability,ST-segment deviation,and blood pressure(BP)in Beijing,China,2014‒2016.Generalized additive mixed models coupled with distributed lag nonlinear models were constructed to evaluate the associations and potential interlinks between O3 exposure and outcome measurements.Results During the study period,24-hour average concentrations of ambient O3 were 47.4µg/m3(ranging from 1.0 to 165.9µg/m3).Increased risks of premature ventricular contraction and ventricular tachycardia were associated with interquartile range increases in O3 exposure during the last 5 days before each participant's clinic visit,with relative risks of 2.14(95%confidence interval[CI]:1.95 to 2.32)and 5.47(95%CI:3.51 to 7.43),respectively.Mediation analyses further showed that sympathetic activation,parasympathetic inhibition,and elevated BP levels,as well as heightened risks of ST-segment depression could mediate up to 47.74%of the risks of arrhythmias attributable to O3 exposure.Conclusion Our results suggest that short-term exposure to ambient O3 could prompt the genesis of arrhythmias partially through worsening autonomic function and myocardial burden.

摘要： This study investigated catalytic decomposition and mass transfer of aqueous ozone promoted by Fe-MnCu/γ-Al_(2)O_(3)(Cat)in a rotating packed bed(RPB)for the first time.The results showed that the value of the overall decomposition rate constant of ozone(K_(c))and overall volumetric mass transfer coefficient(K_(L)a)are 4.28×10^(-3) s^(-1) and 11.60×10^(-3) s^(-1) respectively at an initial pH of 6,βof 40,Co3(g)of 60 mg·L^(-1)and Q_(L) of 85 L·h^(-1) in deionized water,respectively.Meanwhile,the K_(c) and K_(L)a values of Fenhe water are0.88×10^(-3) s^(-1) and 2.51×10^(-3) s^(-1) lower than deionized water,respectively.In addition,the K_(c) and K_(L)a values in deionized water for the Cat/O_(3)-RPB system are 44.86%and 47.41%higher than that for the Cat/O_(3)-BR(bubbling reactor)system,respectively,indicating that the high gravity technology can facilitate the decomposition and mass transfer of ozone in heterogeneous catalytic ozonation and provide some insights into the industrial wastewater.

摘要： Air pollution has become a critical issue in urban areas,so a broad understanding of its spatiotemporal characteristics is important to develop public policies.This study analyzes the spatiotemporal variation of atmospheric particulate matter(PM_(10) and PM_(2.5))and ozone(O_(3))in Barranquilla,Colombia from March 2018 to June 2019 in three monitoring stations.The average concentrations observed for the Móvil,Policía,and Tres Avemarías stations,respectively,for PM_(10):46.4,51.4,and 39.7μg/m^(3);for PM_(2.5):16.1,18.1,and 15.1μg/m^(3) and for O_(3):35.0,26.6,and 33.6μg/m^(3).The results indicated spatial and temporal variations between the stations and the pollutants evaluated.The highest PM concentrations were observed in the southern part of the city,while for ozone,higher concentrations were observed in the north.These variations are mainly associated with the influence of local sources in the environment of each site evaluated as well as the meteorological conditions and transport patterns of the study area.This study also verified the existence of differences in the concentrations of the studied pollutants between the dry and rainy seasons and the contribution of local sources as biomass burnings from the Isla Salamanca Natural Park and long-range transport of dust particles from the Sahara Desert.This study provides a scientific baseline for understanding air quality in the city,which enables policy makers to adopt efficient measures that jointly prevent and control pollution.

摘要： With‘Kyoho’grapes as the experimental material,the effects of different concentrations of chlorine dioxide(5,10 and 15 mg/L)and ozone(30,60and 90 mg/m^(3))fumigation on the contents of total phenols,proanthocyanidins and malondialdehyde(MDA)and the activity of polyphenol oxidase(PPO),peroxidase(POD),catalase(CAT)and superoxide dismutase(SOD)in the grapes during low temperature storage were compared and analyzed,hoping to provide reference for the storage and preservation of‘Kyoho’grapes after harvest.The results showed that compared with the control,certain concentrations of fumigant preservatives inhibited the degradation of total phenols and proanthocyanidins in‘Kyoho’grapes to varying degrees,maintained better cell membrane integrity,and inhibited the increase of MDA content and PPO activity,and in the later stage,more stable POD and higher activity of CAT and SOD were maintained.Comprehensive analysis showed that among the six fumigation treatments,10 mg/L ClO_(2)and 60 mg/m^(3)O_(3)could delay the aging process of grapes and maintain better antioxidant capacity and storage quality.

摘要： In this work,the influence of South Asian biomass burning emissions on O_(3) and PM_(2.5)concentrations over the Tibetan Plateau(TP)is investigated by using the regional climate chemistry transport model WRF-Chem.The simulation is validated by comparing meteorological fields and pollutant concentrations against in situ observations and gridded datasets,providing a clear perspective on the spatiotemporal variations of O_(3) and PM_(2.5)concentrations across the Indian subcontinent,including the Tibetan Plateau.Further sensitivity simulations and analyses show that emissions from South Asian biomass burning mainly affect local O_(3) concentrations.For example,contribution ratios were up to 20%in the Indo-Gangetic Plain during the pre-monsoon season but below 1%over the TP throughout the year 2016.In contrast,South Asian biomass burning emissions contributed more than 60%of PM_(2.5)concentration over the TP during the pre-monsoon season via significant contribution of primary PM_(2.5)components(black carbon and organic carbon)in western India that were lofted to the TP by westerly winds.Therefore,it is suggested that cutting emissions from South Asian biomass burning is necessary to alleviate aerosol pollution over the TP,especially during the pre-monsoon season.

摘要： The article“Stratospheric Ozone-induced Cloud Radiative Effects on Antarctic Sea Ice”,written by Yan XIA,Yongyun HU,Jiping LIU,Yi HUANG,Fei XIE,and Jintai LIN was originally published electronically on the publisher’s internet portal on 7 of March 2020 without open access.With the author(s)’decision to opt for Open Choice,the copyright of the article changed on 11 of April 2020 to©The Author(s),2020 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License,which permits use,sharing,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s)and the source,provide a link to the Creative Commons licence,and indicate if changes were made.The images or other third party material in this article are included in the article’s Creative Commons licence,unless indicated otherwise in a credit line to the material.If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use,you will need to obtain permission directly from the copyright holder.To view a copy of this licence,visit http://creativecommons.org/licenses/by/4.0.

摘要： 1.Introduction In recent years,the air quality in China has improved significantly.In many cities,however,the concentration of fine particulate matter(PM_(2.5))remains higher than the secondary-level national ambient air quality standard(NAAQS level-2,35μg·m^(-3),GB3095-2012[1])and much higher than the first-level NAAQS(15μg·m^(-3),GB3095-2012[1])and the World Health Organization(WHO)air quality guidelines(5μg·m^(-3)).

摘要： China national air quality monitoring network has become the core data source for air quality assessment and management in China.However,during network construction,the significant change in numbers of monitoring sites with time is easily ignored,which brings uncertainty to air quality assessments.This study aims to analyze the impact of change in numbers of stations on national and regional air quality assessments in China during 2013-18.The results indicate that the change in numbers of stations has different impacts on fine particulate matter(PM_(2.5))and ozone concentration assessments.The increasing number of sites makes the estimated national and regional PM_(2.5) concentration slightly lower by 0.6−2.2μg m^(−3) and 1.4−6.0μg m^(−3) respectively from 2013 to 2018.The main reason is that over time,the monitoring network expands from the urban centers to the suburban areas with low population densities and pollutant emissions.For ozone,the increasing number of stations affects the long-term trends of the estimated concentration,especially the national trends,which changed from a slight upward trend to a downward trend in 2014−15.Besides,the impact of the increasing number of sites on ozone assessment exhibits a seasonal difference at the 0.05 significance level in that the added sites make the estimated concentration higher in winter and lower in summer.These results suggest that the change in numbers of monitoring sites is an important uncertainty factor in national and regional air quality assessments,that needs to be considered in long-term concentration assessment,trend analysis,and trend driving force analysis.

摘要： Correction to:J.For.Res.https://doi.org/10.1007/s11676-020-01191-x In the Original publication of the article,the authors found an error in the text“We recommend CLef of 5 and 12 mmol m−2 POD1 for broadleaved species and conifers,respectively”under the section abstract and conclusion.

摘要： The cluster analysis method needs continuous improvement and perfection in the research and application of the spatial differentiation and change of pollutants.In this paper,the date of monthly highest concentration of ozone(O_(3))and the concentration value of that day were selected as the similarity coefficient between classes.Single-factor cluster analysis was performed on O_(3)during 2016-2019 and the COVID-19 outbreak of 2020 in Hunan Province using the Ward method.The clustering results showed that the spatial distribution of atmospheric O_(3)in the 14 regions of Hunan Province was most suitable to be classified according to class III clustering areas.That is,the Changsha-Zhuzhou-Xiangtan urban agglomeration was the center,and the high-value area was in northern Hunan.The transition area was in central and southern Hunan,while the low-value area was centered in western Hunan.The partition results were in good agreement with the homogeneous subset of one-way ANOVA and the distribution of monitoring values during the same period.The comparison showed that the inter-class plates in the two periods corresponded well,and the intra-class area showed a continuous geographical distribution,and there were dynamic changes in the spatial differentiation of the O_(3)plates in different periods.In 2020,the center of the O_(3)high-value area plate in Hunan Province moved eastward and extended southward,focusing on the middle and lower reaches of the Xiangjiang River basin,and extending to the upstream area;the regional plate in the transition area expanded significantly;the low-value area plate shrank to the two cities in western Hunan.The abnormal emissions and abnormal climate during the COVID-19 epidemic had an impact on the spatial differentiation of O_(3)in Hunan Province.

摘要： Membrane treatment for public water supply has grown exponentially since 1990.The absolute barrier provided by membrane treatment and the capacity to deliver consistent quality with minimum operator attention justified their use initially in small treatment applications.In recent years microbiological standards have tightened following well-documented parasitic disease outbreaks.This development has favoured membrane systems and until recently cost has precluded membrane application in large plants.Veolia Water was awarded a BOOT project for the design,construction and 25 year operation of three water treatment plants ranging in size from 8.0ML/d to 126ML/d,reservoirs and reticulation in the Bendigo region of Victoria.The contract has very stringent water quality targets that have been adopted from the US and EU drinking water standards.To meet the contract requirements high technology processes utilising microfiltration and ozone and BAC filtration were adopted.Conventional CMF microfiltration was chosen for the two smaller plants with the new CMF-S immersed membrane technology selected for the 126ML/day Sandhurst water treatment plant.The Bendigo plant was the largest immersed membrane plant in the wodd for the potable water treatment at the time of commissioning.This paper describes the 126ML/d Bendigo water treatment plant at Bendigo,Australia.It also discusses water quality standards and the multi-barrier approach applied to achieve the required standards to minimise public health risk and maximise aesthetic quality of this water supply.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： 本实用新型涉及医疗车技术领域，具体为一种Ozoned Smartline型医用臭氧治疗仪专用治疗车，包括车体，所述车体包括支撑块以及支撑腿，所述支撑块底端四角位置设置支撑腿，所述支撑腿之间的下方设置支撑板，所述支撑块顶端设置固定槽，所述支撑块位于固定槽左右两侧分别设置固定装置，所述固定装置包括第一传导杆、第二传导杆、固定板、固定弹簧以及固定块，所述支撑块位于固定槽左右两侧分别设置工作空腔，所述固定槽左右两侧分别滑动设置夹持板，所述工作空腔前后两侧分别设置固定板，通过固定装置的设置，方便使用。

摘要： 本实用新型公开了一种空气净化器Ozone测试室,包括门、测试室和分析仪器，所述门连通测试室；所述测试室设有环境外舱、测试内舱和进排风口，所述进排风口包括新风入口和废气出口，所述新风入口远离所述废气出口；所述环境外舱设有温湿度控制装置、管道系统和空气处理系统，所述温湿度控制装置设在所述环境外舱内部，所述管道系统连接所述温湿度控制装置和所述空气处理系统，所述测试内舱内部设有内舱布风口；所述分析仪器一端设置在所述测试内舱内部，一端设在测试室之外。有益效果在于：本实用新型结构简单，通过两级空气过滤系统、臭氧发生器和温湿度控制装置使进入测试舱内部的空气满足测试标准。

摘要： 本发明公开一种基于HBase和ozone的医疗影像文件存取方法,涉及分布式数据存储技术领域；将医疗影像文件元数据信息存储到HBase，对应的医疗影像文件储到ozone对象存储系统中，通过查询HBase，获取医疗影像文件的元数据信息和唯一标识，再根据医疗影像文件的元数据信息和唯一标识从ozone对象存储中直接获取对应的医疗影像文件，利用本发明方法分开存储医疗影像数据有利于数据细化更新和分类保存及删除，便于后续维护扩展，且存储容量大，可通过java API提供医疗影像存储、更新、删除以及查询功能，适合多用户使用，具有广阔的应用前景。