A5008081310- Indoor Air Quality and Microbial Exposure
- Air Quality and Health Impacts
- Noise Effects and Management
- Building Energy and Comfort Optimization
- Air Quality Monitoring and Forecasting
- Effects and risks of endocrine disrupting chemicals
- Facilities and Workplace Management
- Climate Change and Health Impacts
- Vehicle emissions and performance
- Skin Protection and Aging
- Asthma and respiratory diseases
- Wind and Air Flow Studies
- Infection Control and Ventilation
- Conservation Techniques and Studies
- Allergic Rhinitis and Sensitization
- Education, Healthcare and Sociology Research
- Sustainable Building Design and Assessment
- Engine and Fuel Emissions
- Social and Educational Sciences
- Pediatric health and respiratory diseases
- Animal testing and alternatives
- Olfactory and Sensory Function Studies
- Patient Satisfaction in Healthcare
- Odor and Emission Control Technologies
- Frailty in Older Adults
Technical University of Denmark
2013-2024
Jen-Ai Hospital
2015-2020
Indoor Biotechnologies (United States)
2004-2020
Fribourg Development Agency
2020
Oregon State University
2020
Ferro (United States)
2019
Klinikum Region Hannover
2005
Queen's University
1983
Abstract Perceived air quality, Sick Building Syndrome (SBS) symptoms and productivity were studied in a normally furnished office space (108 m3) ventilated with an outdoor airflow of 3, 10 or 30 L/s per person, corresponding to change rate 0.6, 2 6 h−1. The temperature 22 °C, the relative humidity 40% all other environmental parameters remained unchanged. Five groups six female subjects each exposed three ventilation rates, one group at time. Each exposure lasted 4.6 h took place afternoon....
Abstract Sensory responses to clean air and polluted by five building materials under different combinations of temperature humidity in the ranges 18-28°C 30-70%RH were studied laboratory. A specially designed test system was built a set experiments observe separately impact on perception quality/odour intensity, emission pollutants from materials. This paper reports perception. The odour intensity did not change significantly with humidity; however, strong significant quality found....
Abstract Perceived air quality, Sick Building Syndrome (SBS) symptoms and productivity were studied in an existing office which the pollution level could be modified by introducing or removing a source. This reversible intervention allowed space to classified as either non-low-polluting low-polluting, specified new European design criteria for indoor environment CEN CR 1752 (1998). The source was 20-year-old used carpet introduced on rack behind screen so that it invisible occupants. Five...
Total daily intakes of diethyl phthalate (DEP), di(n-butyl) (DnBP), di(isobutyl) (DiBP), butyl benzyl (BBzP) and di(2-ethylhexyl) (DEHP) were calculated from metabolite levels measured in the urine 431 Danish children between 3 6 years age. For each child intake attributable to exposures indoor environment via dust ingestion, inhalation dermal absorption estimated collected child's home daycare center. Based on samples, DEHP had highest total (median: 4.42 µg/d/kg-bw) BBzP lowest 0.49...
BackgroundFundamental considerations indicate that, for certain phthalate esters, dermal absorption from air is an uptake pathway that comparable to or greater than inhalation. Yet this has not been experimentally evaluated and largely overlooked when assessing of esters.ObjectivesThis study investigated transdermal uptake, directly air, diethyl (DEP) di(n-butyl) (DnBP) in humans.MethodsIn a series experiments, six human participants were exposed 6 hr chamber containing deliberately elevated...
Perceived air quality (PAQ), sick building syndrome (SBS) symptoms and performance of office work were studied in a real space at three levels temperature humidity two ventilation rate (20 degrees C/40%, 23 C/50%, 26 C/60% RH 10 l s(-1) p(-1) outside air, 20 C/40% 3.5 air). Thirty female subjects participated the experiment. They exposed to each environmental condition for 280 min. Thermal comfort was maintained different thermal environments by self-adjustment clothing. The performed...
Abstract The amount of volatile organic compounds (VOCs) in indoor air, usually called TVOC (total compounds), has been measured using different definitions and techniques which yield results. This report recommends a definition referring to specified range VOCs it proposes method for the measurement this entity. Within range, concentrations identified (including 64 target compounds) are summed up, non-identified toluene equivalents added and, together with VOCs, they give value. reviews...
Abstract A European project started at the end of 1992, in which, addition to current methods, trained sensory panels were used investigate office buildings all over Europe. The main aim this EC-Audit was develop assessment procedures and guidance on ventilation source control, help optimize energy use while assuring good indoor air quality. In each nine countries, six or more selected. Measurements performed five selected locations building. studied normally occupied ventilated identify...
Three air temperatures (22/26/30 degrees C) and two acoustic conditions-quiet (35 dBA) or open-plan office noise (55 dBA)-were established in an office. Thirty subjects aged 18-29 years (16 male), clothed for thermal neutrality at 22 C, performed simulated work 3 h under all six conditions. Many more (68% vs. 4%) were dissatisfied with the condition (P < 0.01). Warmth decreased acceptability 0.001) perceived quality 0.01) increased odour intensity 0.05) stuffiness After 2 h, some forehead...
Abstract Acceptability of clean air and polluted by building materials was studied in climate chambers with different levels temperature humidity the ranges 18–28°C 30-70% relative (RH). The acceptability quality immediately after entering a chamber during following 20-min whole-body exposure assessed 36 untrained subjects who maintained thermal neutrality modifying their clothing. results confirm significant decrement increasing humidity, as shown previous study facial exposures. odour...
This cross-sectional study investigated the relationship between exposure to airborne indoor and outdoor particulate matter (PM) cardiovascular respiratory health in a population-based sample of 58 residences Copenhagen, Denmark. Over 2-day period particle number concentrations (PNC, 10–300 nm) PM2.5 (aerodynamic diameter < 2.5 μm) were monitored for each living room, PNC (10–280 nm), PM10 10 at an urban background station Copenhagen. In morning, after monitoring period, we measured...
Abstract The presence of Volatile Organic Compounds (VOC) in indoor air has past decades often been associated with adverse health effects such as sensory irritation, odour and the more complex set symptoms called Sick Building Syndrome (SBS). More recently, a possible link between increase prevalence allergies throughout industrialized areas world exposure to elevated concentrations VOCs suggested. In many cases, total VOC (TVOC) is used measure concentration pollution and, by extension,...
Particle number (PN) concentrations (10-300 nm in size) were continuously measured over a period of ~45 h 56 residences nonsmokers Copenhagen, Denmark. The highest when occupants present and awake (geometric mean, GM: 22.3 × 10(3) cm(-3)), the lowest homes vacant (GM: 6.1 cm(-3)) or asleep 5.1 cm(-3)). Diary entries regarding occupancy particle related activities used to identify source events apportion daily integrated exposure among sources. Source clearly resulted increased PN decreased...
Given the rate at which humans shed their skin (desquamation), flakes that contain squalene and cholesterol are anticipated to be major constituents of indoor dust. These compounds have been detected in more than 97% dust samples collected from 500 bedrooms 151 daycare centers young children living Odense, Denmark. The mass fractions were approximately log-normally distributed (homes: GM = 32 μg/g, GSD 4.3; centers: 11.5 4.3); those displayed a poorer fit such distribution 625 3.4; 220 4.0)....