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 ...

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 ...

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 ...

Researchers believe that the puzzle of catalytic gold is now partially solved. Gold can catalyze an oxidation reaction by first oxidizing itself. New research evidence on gold-oxide phase at room ...

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: ...

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 ...

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 ...

Recently, a research team led by Prof. KONG Lingtao at the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS) has prepared a type of hollow amorphous Co/C composites ...