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Found 828 publications. Showing page 7 of 83:

Publication  
Year  
Category

Volatile Methyl Siloxanes in Polar Regions

Krogseth, Ingjerd Sunde; Warner, Nicholas Alexander

2020

Structure, process, and mechanism

Sodemann, Harald; Wernli, Heini; Knippertz, Peter; Cordeira, Jason M.; Dominguez, Francina; Guan, Bin; Hu, Huancui; Ralph, F. Martin; Stohl, Andreas

2020

Effect of filter type in ventilation systems on NO2 concentrations in classrooms

Yang, Aileen; Nikolaisen, Kristian Fredrik; Holøs, Sverre Bjørn; Thunshelle, Kari; Dauge, Franck Rene; Mysen, Mads

This study was conducted to assess how different filter types in the ventilation system affect the indoor NO2 concentrations. Measurements were carried out in two classrooms and air intakes in a primary school located in Oslo, Norway. A regular F7 particle filter and an F7 combination filter with activated charcoal lin-ing were compared. NO2 concentrations were measured for five weeks during winter 2017 in a cross-over study design to compare: 1) NO2-levels in classrooms with regular filter (RF) versus combination filter (CF); 2) indoor/outdoor ratio with regular filter versus combination filter. One-hour average concentrations are reported during operating time of the ventilation system (6:00-23:00) and during hours with high (> 40 μg/m3) outdoor NO2 concentrations. The measured average NO2 concentrations in both classrooms with an RF were significantly higher than with a CF. The median CF/RF ratios for the two class-rooms were 0.50 and 0.81 during hours with high NO2 concentrations, and 0.48 and 1.00 during the period the ventilation system was operational. During hours with high NO2 concentrations, themedian indoor/outdoor ratios for the two class-rooms with an RF were above 1.00, while the corresponding ratios with a CF were 0.78 and 0.75. Our results demonstrate that a combination filter is more efficient than a regular filter in reducing NO2 concentrations in classrooms during hours with high out-door concentrations.

2019

Coastal lagoons: Environmental variability, ecosystem complexity, and goods and services uniformity

Perez-Ruzafa, Angel; Perez-Ruzafa, Isabel M.; Newton, Alice; Marcos, Concepción

2019

In vitro approaches for assessing the genotoxicity of nanomaterials

Dusinska, Maria; Mariussen, Espen; Rundén-Pran, Elise; Hudecova, Alexandra Misci; Elje, Elisabeth; Kazimirova, Alena; Yamani, Naouale El; Dommershausen, Nils; Tharmann, Julian; Fieblinger, Dagmar; Herzberg, Frank; Luch, Andreas; Haase, Andrea

2019

Fluxes of trace metals on a global scale

Thorne, Rebecca Jayne; Pacyna, Jozef M; Sundseth, Kyrre; Pacyna, Elisabeth G

2019

Epigenetic effects of nanomaterials

Smolkova, Bozena; Dusinska, Maria; Gábelová, Alena

2019

The Atmosphere Above Ny-Ålesund: Climate and Global Warming, Ozone and Surface UV Radiation

Maturilli, Marion; Hanssen-Bauer, Inger; Neuber, Roland; Rex, Markus; Edvardsen, Kåre

2019

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