The appearance of free oxygen in the Earth’s atmosphere led to the Great Oxidation Event. This was triggered by cyanobacteria producing the oxygen which developed into multicellular forms as early as ...
Limnology and Oceanography, Vol. 55, No. 3 (May 2010), pp. 1064-1074 (11 pages) We elucidate the controls on the δ¹ɸO values of microbially produced nitrate by tracking the δ¹ɸO of nitrite and nitrate ...
SAN FRANCISCO — Maybe the trigger for the rise of oxygen on Earth was nothing special. Maybe that oxidation didn’t need large tectonic shifts or the evolution of land plants. Instead, the circulation ...
Presented at the 2011 International Conference on Hot Isostatic Pressing Kobe, Japan, 12-14 April 2011. Three kinds of TiN porous ceramics with different relative density (SN1: 87 %; SN2: 66 %; SN3: ...
Methane emissions are strongly reduced in lakes with anoxic bottom waters. But – contrary to what has previously been assumed – methane removal is not always due to archaea or anaerobic bacteria. A ...
Matthew Warke receives funding from the European Research Council (via grant No 678812 to Dr Mark Claire) and the Carnegie Trust for the Universities of Scotland. Around two and a half billion years ...
Journal (Water Pollution Control Federation), Vol. 61, No. 8 (Aug., 1989), pp. 1449-1463 (15 pages) Total barrier oxidation ditches (TBODs) have been installed over the past 5 years in the U. S. under ...
It may have been unexpectedly easy for the air to become rich in oxygen. A new simulation of the rise of oxygen suggests that it was driven by the planet itself, and needed little help from living ...
Today's climate change doesn't hold a candle to the chemical warfare waged on Earth more than 2 billion years ago. Before plants discovered the power of photosynthesis, single-celled life survived on ...
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