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underestimated contribution of HONO to indoor OH radicals: an emerging concern

Science Bulletin 2018年第21期63卷 1383-1384页

作者： Xue Li Sasho Gligorovski Hartmut Herrmann Institute of Mass Spectrometry and Atmospheric Environment Jinan UniversityGuangzhou 510632China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China School of Environmental Sdence and Engineering Fudan UniversityShanghai 200433China Atmospheric Chemistry Department (ACD) Leibniz-lnstitute for Tropospheric Research (TROPOS)Permoserstr.1504318LeipzigGermany

For a long time,the hydroxyl (OH)radicals has attracted particular attention not only because it is the most important species in the photooxidation cycles in the atmosphere but also because it can oxidize volatile organic compounds (VOCs)to form secondary oxygenated gas species and aerosols,some of which can be toxic and *** most people spend 80%-90% of their life-time indoors,a better understanding of the formation,occurrence and reaction of OH radicals indoors is crucial to assess the potential impact on human ***,the secondary pollutants can be substantially reduced in indoor environments only with comprehensive knowledge of the oxidative chemistry and subsequent chains of chemical reactions that pollutants undergo.

关键词： underestimated HONO VOCs

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Observed versus estimated actual trend of COVID-19 case numbers in Cameroon:A data-driven modelling

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Infectious Disease Modelling 2023年第1期8卷 228-239页

作者： Arsène Brunelle Sandie Mathurin Cyrille Tejiokem Cheikh Mbacké Faye Achta Hamadou Aristide Abah Abah Serge Sadeuh Mbah Paul Alain Tagnouokam-Ngoupo Richard Njouom Sara Eyangoh Ngu Karl Abanda Maryam Diarra Slimane Ben Miled Maurice Tchuente Jules Brice Tchatchueng-Mbougua African Population and Health Research Center West Africa Regional OfficeDakarSenegal Centre Pasteur du Cameroon membre du Réseau International des Instituts PasteurCameroon Direction de la lutte contre les Maladiesépidémiques et les pandémies Ministere de la santépubliqueCameroon Fondation pour la recherche l'ingénierie et l'innovation Cameroon Institut Pasteur de Dakar DakarSenegal Institut Pasteur de Tunis TunisTunisia IRD UMI 209 UMMISCO University of Yaounde IP.O.Box 337YaoundeCameroon

Controlling the COVID-19 outbreak remains a challenge for Cameroon,as it is for many other countries *** number of confirmed cases reported by health authorities in Cameroon is based on observational data,which is not nationally *** actual extent of the outbreak from the time when the first case was reported in the country to now remains *** study aimed to estimate and model the actual trend in the number of COVID-19 new infections in Cameroon from March 05,2020 to May 31,2021 based on an observed disaggregated *** used a large disaggregated dataset,and multilevel regression and poststratification model was applied prospectively for COVID-19 cases trend estimation in Cameroon from March 05,2020 to May 31,***,seasonal autoregressive integrated moving average(SARIMA)modeling was used for forecasting *** on the prospective MRP modeling findings,a total of about 7450935(30%)of COVID-19 cases was estimated from March 05,2020 to May 31,2021 in ***,the reported number of COVID-19 infection cases in Cameroon during this period underestimated the estimated actual number by about 94 *** forecasting indicated a succession of two waves of the outbreak in the next two years following May 31,*** no action is taken,there could be many waves of the outbreak in the *** avoid such situations which could be a threat to global health,public health Abbreviations:ACF,Autocorrelation Function;AIC,Akaike information criterion;COVID-19,Coronavirus Disease 2019;MAE,Mean Absolute Error;MAPE,Mean Absolute Percentage Error;MASE,Mean Absolute Scaled Error;ME,Mean Error;MPE,Mean Percentage Error;MRP,Multilevel Regression and Post-stratification;PACF,Partial Autocorrelation Function;PLACARD,Platform for Collecting,Analyzing and Reporting Data;SARIMA,Seasonal Autoregressive integrated moving average;SARS-CoV-2,Severe Acute Respiratory Syndrome Coronavirus 2.

关键词： Cameroon COVID-19 Forecasting Observed Post-stratification underestimated

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