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Occupational exposure to ionizing radiation in pregnant staff. Consensus document of ACI-SEC/ARC-SEC/SERVEI/SENR/SERAM/GeNI. [PDF]
REC Interv CardiolMartín MV +12 more
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Evaluation of practices for the diagnosis and monitoring of cytomegalovirus infection in kidney transplant recipients in Brazil. [PDF]
J Bras NefrolHatem NA +4 more
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Global Biogeochemical Cycles, 2017
AbstractPhosphorus is believed to be the globally limiting nutrient in the modern ocean, but a number of nutrients have been invoked as limiting the Proterozoic biosphere. Mass balance calculations suggest that Proterozoic net primary productivity must have been 1 to 2 orders of magnitude less than today in order to maintain low oxygen levels despite ...
Thomas A. Laakso, Daniel P. Schrag
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AbstractPhosphorus is believed to be the globally limiting nutrient in the modern ocean, but a number of nutrients have been invoked as limiting the Proterozoic biosphere. Mass balance calculations suggest that Proterozoic net primary productivity must have been 1 to 2 orders of magnitude less than today in order to maintain low oxygen levels despite ...
Thomas A. Laakso, Daniel P. Schrag
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The Journal of the Acoustical Society of America, 1998
Today, traffic noise due to cars, trains, and airplanes is the main noise source in urban areas. In accordance with the European Commission’s Green paper on Future Noise Policy, 22% of the European population are exposed to outdoor A-weighted noise levels higher than 65 dB and more than 45% are exposed to levels between 55 and 65 dB.
Tor Kihlman, Wolfgang Kropp
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Today, traffic noise due to cars, trains, and airplanes is the main noise source in urban areas. In accordance with the European Commission’s Green paper on Future Noise Policy, 22% of the European population are exposed to outdoor A-weighted noise levels higher than 65 dB and more than 45% are exposed to levels between 55 and 65 dB.
Tor Kihlman, Wolfgang Kropp
openaire +1 more source