Results 61 to 70 of about 3,727,608 (358)

Modifications in the composition of the atmosphere [PDF]

Journal of the Franklin Institute, 1880
n ...
openaire   +2 more sources

The Chemical Composition of the Atmosphere of Venus [PDF]

Symposium - International Astronomical Union, 1971
The chemical composition sensors on the Venera-4, -5, and -6 spacecraft are described. The mixing ratio by volume of carbon dioxide is determined to be 97 (+3, −4)%; nitrogen, less than 2%, oxygen, less than about 0.1%; and water vapor at the 25 °C temperature level, on the order of 10 mg/l, an amount large enough to imply that the clouds of Venus are ...
O. M. Kalinkina, Yu. A. Surkov, A. P. Vinogradov, B. M. Andreichikov, I. M. Grechischeva   +4 more
openaire   +2 more sources

Measurement report: The effects of SECA regulations on the atmospheric SO₂ concentrations in the Baltic Sea, based on long-term observations on the Finnish island, Utö [PDF]

Atmospheric Chemistry and Physics
The designation of the Baltic Sea as a sulfur emission control area (SECA) in May 2006, with subsequent tightening of regulations in 2010 and 2015, has reduced the sulfuric emission from shipping traffic.
A. Maragkidou, T. Grönholm, L. Rautiainen, J. Nikmo, J.-P. Jalkanen, T. Mäkelä, T. Anttila, L. Laakso, L. Laakso, J. Kukkonen, J. Kukkonen   +10 more
doaj   +1 more source

The Network for the Detection of Atmospheric Composition Change (NDACC): history, status and perspectives

, 2017
. The Network for the Detection of Atmospheric Composition Change (NDACC) is an international global network of more than 90 stations making high-quality measurements of atmospheric composition that began official operations in 1991 after 5 years of ...
M. Mazière, A. Thompson, M. Kurylo, J. Wild, G. Bernhard, T. Blumenstock, G. Braathen, J. Hannigan, J. Lambert, T. Leblanc, T. Mcgee, G. Nedoluha, I. Petropavlovskikh, G. Seckmeyer, P. Simon, W. Steinbrecht, S. Strahan   +16 more
semanticscholar   +1 more source

Chemical Composition of the Atmosphere

, 2012
Atmospheric trace gases have an important impact on Earth’s radiative budget, the oxidative or cleansing ability of the atmosphere, the formation, growth and properties of aerosols, air quality, and human health. During recent years, the coupling between atmospheric chemistry and climate has received particular attention.
Schlager, Hans, Grewe, Volker, Roiger, Anke   +2 more
openaire   +3 more sources

ATMOSPHERIC CIRCULATION AND COMPOSITION OF GJ1214b [PDF]

The Astrophysical Journal, 2011
14 pages, 4 figures, 1 table, accepted for publication in ...
openaire   +2 more sources

Snow Samples Combined With Long-Range Transport Modeling to Reveal the Origin and Temporal Variability of Black Carbon in Seasonal Snow in Sodankylä (67°N)

Frontiers in Earth Science, 2020
In the Arctic areas, the influence of global climate change is enhanced. Enabling a better understanding of the changes in the Arctic environment is of the utmost importance.
Outi Meinander, Anna Kontu, Rostislav Kouznetsov, Rostislav Kouznetsov, Mikhail Sofiev   +4 more
doaj   +1 more source

Protonophore activity of short‐chain fatty acids induces their intracellular accumulation and acidification

FEBS Letters, EarlyView.
The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang, Frans Bianchi, Geert van den Bogaart   +2 more
wiley   +1 more source

The applicability and challenges of black carbon sensors in monitoring networks [PDF]

Aerosol Research
Black carbon (BC) is a particulate pollutant emitted as a by-product of combustion. BC has an emerging role in air quality monitoring with the current recommendations by the World Health Organization to monitor BC to capture its temporal and spatial ...
J. T. Elomaa, K. Luoma, K. Luoma, S. D. Harni, A. Virkkula, H. Timonen, T. Petäjä   +6 more
doaj   +1 more source

The thioredoxin‐like and one glutaredoxin domain are required to rescue the iron‐starvation phenotype of HeLa GLRX3 knock out cells

FEBS Letters, EarlyView.
Glutaredoxin (Grx) 3 proteins contain a thioredoxin domain and one to three class II Grx domains. These proteins play a crucial role in iron homeostasis in eukaryotic cells. In human Grx3, at least one of the two Grx domains, together with the thioredoxin domain, is essential for its function in iron metabolism.
Laura Magdalena Jordt, Manuela Gellert, Finja Zelms, Sander Bekeschus, Christopher Horst Lillig   +4 more
wiley   +1 more source