107,538 results match your criteria air quality


Measurement of Diacetyl and Related Compounds in Coffee Roasteries and Breweries.

Ann Work Expo Health 2021 Nov 23. Epub 2021 Nov 23.

Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA.

α-Diketones such as diacetyl (2,3-butanedione) and 2,3-pentanedione are generated during the roasting and fermentation of foods and are also used as flavoring compounds. Exposure to these compounds has been associated with obliterative bronchiolitis in workers. We report indoor air concentrations of diacetyl and 2,3-pentanedione, as well as acetoin (3-hydroxy-2-butanone), in several small coffee roasteries and breweries using standard integrated air sampling sorbent tubes followed by gas chromatography tandem mass spectrometry as well as the first use of on-site continuous real-time proton-transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS). Read More

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November 2021

Long-term exposure to ambient air pollutants and hearing loss in Korean adults.

Sci Total Environ 2022 Jan 17:153124. Epub 2022 Jan 17.

Department of Health Sciences and Technology, GAIHST, Gachon University, Republic of Korea; Department of Preventive Medicine, Gachon University College of Medicine, Republic of Korea. Electronic address:

Background: Hearing loss is the most prevalent sensory deficit globally, and its prevalence has been growing at a rapid pace, mainly due to the aging population. Although there is plentiful evidence that exposure to air pollutants contributes to oxidative stress and free radical formation in the inner ear is linked to hearing impairment, there is little awareness of the contribution of air pollution to hearing loss.

Objective: We aimed to evaluate the associations between long-term exposures to air pollution and hearing loss in Korean adults, while controlling for sociodemographic and clinical factors and occupational, recreational, and firearm noise exposures. Read More

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January 2022

Organophosphate flame retardants induce oxidative stress and Chop/Caspase 3-related apoptosis via Sod1/p53/Map3k6/Fkbp5 in NCI-1975 cells.

Sci Total Environ 2022 Jan 17;819:153160. Epub 2022 Jan 17.

Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai 200092, China.

Organophosphate flame retardants (OPFRs) have been ubiquitously detected in dust and air which could cause damage to human health through inhalation. Currently the understanding of their adverse effects and potential mechanisms on the lung are still limited. In this study, human non-small cell lung cancer cell line NCI-H1975 was used to investigate the cytotoxicity, oxidative stress, cellular apoptosis of 9 typical OPFRs with concentrations varied from 0 to 200 μM, and their toxic mechanism associated with molecular structure was compared. Read More

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January 2022

Pollution characteristics and source identification of PBDEs in public transport microenvironments.

Sci Total Environ 2022 Jan 18;820:153159. Epub 2022 Jan 18.

College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Hangzhou Environmental Group Co., Ltd, China.

Public transport microenvironments easily accumulate pollutants due to high airtightness and poor circulation. To investigate and analyze the pollution levels and sources of polybrominated diphenyl ethers (PBDEs), air and dust samples were collected from hybrid buses, electric buses and subways in Hangzhou, China. The components of six priority control PBDE congeners (BDE-28, -47, -99, -100, -153, and -209) were analyzed. Read More

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January 2022

Personal Exposure to Black Carbon, Particulate Matter and Nitrogen Dioxide in the Paris Region Measured by Portable Sensors Worn by Volunteers.

Toxics 2022 Jan 11;10(1). Epub 2022 Jan 11.

Laboratoire DAVID, Université de Versailles Saint-Quentin-en-Yvelines, 78035 Versailles, France.

Portable sensors have emerged as a promising solution for personal exposure (PE) measurement. For the first time in Île-de-France, PE to black carbon (BC), particulate matter (PM), and nitrogen dioxide (NO) was quantified based on three field campaigns involving 37 volunteers from the general public wearing the sensors all day long for a week. This successful deployment demonstrated its ability to quantify PE on a large scale, in various environments (from dense urban to suburban, indoor and outdoor) and in all seasons. Read More

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January 2022

Potential Risks of PM-Bound Polycyclic Aromatic Hydrocarbons and Heavy Metals from Inland and Marine Directions for a Marine Background Site in North China.

Toxics 2022 Jan 11;10(1). Epub 2022 Jan 11.

The State Environmental Protection Key Laboratory of Urban Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

Ambient PM-bound ions, OC, EC, heavy metals (HMs), 18 polycyclic aromatic hydrocarbons (PAHs), 7 hopanes, and 29 n-alkanes were detected at Tuoji Island (TI), the only marine background atmospheric monitoring station in North China. The annual PM average concentration was 47 ± 31 μg m, and the average concentrations of the compositions in PM were higher in cold seasons than in warm seasons. The cancer and non-cancer risks of HMs and PAHs in cold seasons were also higher than in warm seasons. Read More

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January 2022

The Carcinogenic Properties of Overlooked yet Prevalent Polycyclic Aromatic Hydrocarbons in Human Lung Epithelial Cells.

Toxics 2022 Jan 9;10(1). Epub 2022 Jan 9.

Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), 44789 Bochum, Germany.

The WHO classified air pollution as a human lung carcinogen and polycyclic aromatic hydrocarbons (PAHs) are components of both indoor (e.g., tobacco smoke and cookstoves) and outdoor (e. Read More

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January 2022

Detection of Benzo[]pyrene Diol Epoxide Adducts to Histidine and Lysine in Serum Albumin In Vivo by High-Resolution-Tandem Mass Spectrometry.

Toxics 2022 Jan 8;10(1). Epub 2022 Jan 8.

Department of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden.

Electrophilic diol epoxide metabolites are involved in the carcinogenicity of benzo[]pyrene, one of the widely studied polycyclic aromatic hydrocarbons (PAHs). The exposure of humans to this PAH can be assessed by measuring stable blood protein adducts, such as to histidine and lysine in serum albumin, from their reactive metabolites. In this respect, measurement of the adducts originating from the genotoxic (+)-anti-benzo[]pyrene diol epoxide is of interest. Read More

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January 2022

Urban Neighbourhood Environments, Cardiometabolic Health and Cognitive Function: A National Cross-Sectional Study of Middle-Aged and Older Adults in Australia.

Toxics 2022 Jan 7;10(1). Epub 2022 Jan 7.

School of Psychology, University of New South Wales, Randwick, NSW 2052, Australia.

Population ageing and urbanisation are global phenomena that call for an understanding of the impacts of features of the urban environment on older adults' cognitive function. Because neighbourhood characteristics that can potentially have opposite effects on cognitive function are interdependent, they need to be considered in conjunction. Using data from an Australian national sample of 4141 adult urban dwellers, we examined the extent to which the associations of interrelated built and natural environment features and ambient air pollution with cognitive function are explained by cardiometabolic risk factors relevant to cognitive health. Read More

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January 2022

Prenatal PM Exposure in Relation to Maternal and Newborn Telomere Length at Delivery.

Toxics 2022 Jan 3;10(1). Epub 2022 Jan 3.

Columbia Center for Children's Environmental Health, New York, NY 10032, USA.

Particulate matter with an aerodynamic diameter of 2.5 μm or less (PM) is a ubiquitous air pollutant that is increasingly threatening the health of adults and children worldwide. One health impact of elevated PM exposure is alterations in telomere length (TL)-protective caps on chromosome ends that shorten with each cell division. Read More

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January 2022

City Scale Modeling of Ultrafine Particles in Urban Areas with Special Focus on Passenger Ferryboat Emission Impact.

Toxics 2021 Dec 21;10(1). Epub 2021 Dec 21.

Institute of Coastal Environmental Chemistry, Helmholtz Zentrum Hereon, 21502 Geesthacht, Germany.

Air pollution by aerosol particles is mainly monitored as mass concentrations of particulate matter, such as PM and PM. However, mass-based measurements are hardly representative for ultrafine particles (UFP), which can only be monitored adequately by particle number (PN) concentrations and are considered particularly harmful to human health. This study examines the dispersion of UFP in Hamburg city center and, in particular, the impact of passenger ferryboats by modeling PN concentrations and compares concentrations to measured values. Read More

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December 2021

Optimum parameters for humic acid removal and power production by Al-air fuel cell electrocoagulation in synthetic wastewater.

Water Sci Technol 2022 Jan;85(1):174-187

School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China E-mail: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Hefei 230061, China; Key Laboratory of Water Pollution Control and Wastewater Reuse of Anhui Province, Hefei 230061, China.

Although humic acid (HA) is a complex natural organic matter, it can potentially harm the environment and human health. In this study, aluminum-air fuel cell electrocoagulation (AAFCEC) was used to remove HAs from water while generating electricity. Initial pH, electrolyte concentration, HA concentration electrode distance and external resistance were investigated to determine the power generation and removal efficiency. Read More

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January 2022

Trends and Challenges Regarding the Source-Specific Health Risk of PM-Bound Metals in a Chinese Megacity from 2014 to 2020.

Environ Sci Technol 2022 Jan 20. Epub 2022 Jan 20.

Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.

Identifying the health risk of PM is essential for urban air pollution control. In 2013, China announced the ever-strict national Air Pollution Prevention and Control Action Plan, and its health benefit should be evaluated to provide reference for future policymaking. In this study, we conducted a seven-year (2014-2020) continuous observation of PM in Shenzhen, the third largest city in China, which has relatively good air quality. Read More

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January 2022

Vehicular Emissions Enhanced Ammonia Concentrations in Winter Mornings: Insights from Diurnal Nitrogen Isotopic Signatures.

Environ Sci Technol 2022 Jan 20. Epub 2022 Jan 20.

CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China.

A general feature in the diurnal cycle of atmospheric ammonia (NH) concentrations is a morning spike that typically occurs around 07:00 to 10:00 (LST). Current hypotheses to explain this morning's NH increase remain elusive, and there is still no consensus whether traffic emissions are among the major sources of urban NH. Here, we confirmed that the NH morning pulse in urban Beijing is a universal feature, with an annual occurrence frequency of 73. Read More

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January 2022

, , and Ulvan as Biocontrol Agents of Fruit Rot Disease in Muskmelon ( L.).

Plants (Basel) 2022 Jan 11;11(2). Epub 2022 Jan 11.

Centro de Investigaciones Biológicas del Noroeste, Calle Instituto Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23096, Mexico.

The indiscriminate use of synthetic fungicides has led to negative impact to human health and to the environment. Thus, we investigated the effects of postharvest biocontrol treatment with , , and a polysaccharide ulvan on fruit rot disease, storability, and antioxidant enzyme activity in muskmelon ( L. var. Read More

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January 2022

Optical Fiber, Nanomaterial, and THz-Metasurface-Mediated Nano-Biosensors: A Review.

Biosensors (Basel) 2022 Jan 14;12(1). Epub 2022 Jan 14.

School of Mathematics, Computer Science and Engineering, University of London, London EC1V 0HB, UK.

The increasing use of nanomaterials and scalable, high-yield nanofabrication process are revolutionizing the development of novel biosensors. Over the past decades, researches on nanotechnology-mediated biosensing have been on the forefront due to their potential application in healthcare, pharmaceutical, cell diagnosis, drug delivery, and water and air quality monitoring. The advancement of nanoscale science relies on a better understanding of theory, manufacturing and fabrication practices, and the application specific methods. Read More

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January 2022

Hot air-assisted radio frequency drying of apricots: Mathematical modeling study for process design.

J Food Sci 2022 Jan 20. Epub 2022 Jan 20.

Department of Food Engineering, Ankara University, Ankara, Turkey.

Conventional hot air and solar energy processes have been used for apricot. These processes had adverse effects on the quality due to the longer process times, and this indicates the need for an innovative approach. Radio frequency (RF) processing has innovation potential for drying with its volumetric heating feature, but an optimal process should be designed for process efficiency in industrial-scale applications. Read More

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January 2022

Association between air pollution exposure and mental health service use among individuals with first presentations of psychotic and mood disorders: retrospective cohort study.

Br J Psychiatry 2021 Dec;219(6):678-685

King's College London, Centre for Implementation Science, Health Services and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience, London; and King's College London, Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, London, UK.

Background: Growing evidence suggests that air pollution exposure may adversely affect the brain and increase risk for psychiatric disorders such as schizophrenia and depression. However, little is known about the potential role of air pollution in severity and relapse following illness onset.

Aims: To examine the longitudinal association between residential air pollution exposure and mental health service use (an indicator of illness severity and relapse) among individuals with first presentations of psychotic and mood disorders. Read More

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December 2021

Experimental evaluation of respiratory droplet spread to rooms connected by a central ventilation system.

Indoor Air 2022 Jan 19. Epub 2022 Jan 19.

Pacific Northwest National Laboratory (PNNL), Richland, Washington, USA.

This article presents results from an experimental study to ascertain the transmissibility of the SARS-CoV-2 virus between rooms in a building that are connected by a central ventilation system. Respiratory droplet surrogates made of mucus and virus mimics were released in one room in a test building, and measurements of concentration levels were made in other rooms connected via the ventilation system. The paper presents experimental results for different ventilation system configurations, including ventilation rate, filtration level (up to MERV-13), and fractional outdoor air intake. Read More

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January 2022

Evaluation of SARS-COV-2 transmission and infection in airliner cabins.

Indoor Air 2022 Jan 19. Epub 2022 Jan 19.

Department of Building Environment and Energy Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong.

Commercial airliners have played an important role in spreading the SARS-CoV-2 virus worldwide. This study used computational fluid dynamics (CFD) to simulate the transmission of SARS-CoV-2 on a flight from London to Hanoi and another from Singapore to Hangzhou. The dispersion of droplets of different sizes generated by coughing, talking, and breathing activities in a cabin by an infected person was simulated by means of the Lagrangian method. Read More

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January 2022

Comparative analysis of apocarotenoids and phenolic constituents of Crocus sativus stigmas from 11 countries: Ecological impact.

Arch Pharm (Weinheim) 2022 Jan 19:e2100468. Epub 2022 Jan 19.

Department of Pharmaceutical Chemistry, National University of Pharmacy of Ministry of Health of Ukraine, Kharkiv, Ukraine.

The chemical compositions of 15 saffron samples from 11 countries (Morocco, India, Italy, Spain, Germany, Switzerland, Iran, Lithuania, Ukraine, Australia, and Azerbaijan) were evaluated. The samples were analyzed regarding the impact of environmental factors on the composition of apocarotenoids and phenolic constituents. Quantification of saffron metabolites was carried out using high-performance liquid chromatography. Read More

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January 2022

Exploring the existence of environmental Phillips curve in South Asian countries.

Environ Sci Pollut Res Int 2022 Jan 20. Epub 2022 Jan 20.

Remote Sensing, GIS and Climatic Research Lab (National center of GIS and Space Applications), Department of Space Science, University of the Punjab, Lahore, Pakistan.

Considering the economic activities that trigger alarming situations for the global atmosphere and ecology, this work probes the associations of unemployment (UNE), GDP, population growth (POP), renewable (REN), non-renewable energy use (ENE), and ecological footprints (EF) for South Asian countries. The annual data of 1991-2019 is analyzed for empirical results. This is the first study that employs panel as well as country-specific estimations for South Asian countries by utilizing the Pool mean group (PMG) and autoregressive distributed lag (ARDL) methods, respectively. Read More

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January 2022

Changes in Oral Health Policies and Guidelines During the COVID-19 Pandemic.

Front Oral Health 2021 20;2:668444. Epub 2021 May 20.

Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.

The aim of this study was to describe the changes in oral health policies and guidelines in response to the Coronavirus disease 2019 (COVID-19) pandemic in different countries and regions around the world. Information on oral health policies and guidelines from 9 countries (Canada, China including Hong Kong, Egypt, India, Japan, New Zealand, Nigeria, Switzerland, and Thailand) were summarized, and sources of the information were mostly the national or regional health authorities and/or dental council/associations. The changes made to the oral health guidelines depended on the severity of the COVID-19 pandemic. Read More

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Powered Respirators Are Effective, Sustainable, and Cost-Effective Personal Protective Equipment for SARS-CoV-2.

Front Med Technol 2021 14;3:729658. Epub 2021 Oct 14.

NIHR Southampton Clinical Research Facility and NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom.

The provision of high-quality personal protective equipment (PPE) has been a critical challenge during the COVID-19 pandemic. We evaluated an alternative strategy, mass deployment of a powered air-purifying respirator (PeRSo), in a large university hospital. We performed prospective user feedback questionnaires sent to healthcare workers (HCWs) issued PeRSos, economic analysis, and evaluated the real-world impact. Read More

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October 2021

Global fine-scale changes in ambient NO during COVID-19 lockdowns.

Nature 2022 01 19;601(7893):380-387. Epub 2022 Jan 19.

Environment and Climate Change Canada, Toronto, Ontario, Canada.

Nitrogen dioxide (NO) is an important contributor to air pollution and can adversely affect human health. A decrease in NO concentrations has been reported as a result of lockdown measures to reduce the spread of COVID-19. Questions remain, however, regarding the relationship of satellite-derived atmospheric column NO data with health-relevant ambient ground-level concentrations, and the representativeness of limited ground-based monitoring data for global assessment. Read More

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January 2022

Spatial analysis of tobacco outlet density on secondhand smoke exposure and asthma health among children in Baltimore City.

Tob Control 2022 Jan 19. Epub 2022 Jan 19.

Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland, USA.

Rationale: Tobacco outlets are concentrated in low-income neighbourhoods; higher tobacco outlet density is associated with increased smoking prevalence. Secondhand smoke (SHS) exposure has significant detrimental effects on childhood asthma. We hypothesised there was an association between higher tobacco outlet density, indoor air pollution and worse childhood asthma. Read More

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January 2022

The short-term effects and burden of particle air pollution on hospitalization for coronary heart disease: a time-stratified case-crossover study in Sichuan, China.

Environ Health 2022 Jan 19;21(1):19. Epub 2022 Jan 19.

School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, Sichuan, China.

Background: Coronary heart disease (CHD), the leading cause of death globally, might be developed or exacerbated by air pollution, resulting high burden to patients. To date, limited studies have estimated the relations between short-term exposure to air pollution and CHD disease burden in China, with inconsistent results. Hence, we aimed to estimate the short-term impact and burden of ambient PM pollutants on hospitalizations of CHD and specific CHD. Read More

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January 2022

Association of sensitive eyes with sensitive skin: A worldwide study of 10,743 subjects.

Skin Pharmacol Physiol 2022 Jan 19. Epub 2022 Jan 19.

Introduction: Sensitive eyes are commonly reported by patients but there are very few epidemiological studies on this disorder. The aim of this study was the evaluation of the self-reported frequency of sensitive eyes and the association with sensitive skin.

Methods: A survey was performed on a representative sample of the population aged more than 18 years in five different countries (Brazil, China, France, Russia, and the United States). Read More

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January 2022

Association of short-term exposure to air pollution with recurrent ischemic cerebrovascular events in older adults.

Int J Hyg Environ Health 2022 Jan 16;240:113925. Epub 2022 Jan 16.

Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, 510080, China. Electronic address:

The acute effects of ambient air pollution on recurrence of ischemic cerebrovascular events (ICEs) remains largely unknown. We therefore conducted a time-stratified case-crossover study of 43,896 patients who were 60 years or older and were admitted to hospital for recurrent ICEs including ischemic stroke and transient ischemic attack in Guangzhou, China during 2016-2019. Based on each patient's home address and pollutant data from its neighboring air quality monitoring stations, we used an inverse distance weighting method to assess exposures to particulate matter with an aerodynamic diameter ≤2. Read More

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January 2022

Air contamination of therapeutic drug monitoring assay reagents results in falsely high plasma ammonia levels.

Ann Clin Biochem 2022 Jan 19:45632221074508. Epub 2022 Jan 19.

Laboratory Medicine38088Kitasato University School of Medicine.

Background: Accumulating evidence shows that contamination of blood samples by atmospheric ammonia affects blood ammonia test levels; however, reports on the effect of ammonia contamination of assay reagents are limited. Here, we aimed to clarify the effect of ammonia contamination of assay reagents, particularly the therapeutic drug monitoring (TDM) reagents, on the detection levels of blood ammonia using enzymatic assays.

Methods: Ammonia gas was measured in the refrigerator compartment of the automatic analyser and the reaction tank water, probe wash water, and drain outlets connected to the automatic analyser. Read More

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January 2022