In particular , certain sulfate reducing bacteria can reduce
Meteoritic standard was chosen because of the constancy of the sulfur isotopic ratio in meteorites , whereas the sulfur isotopic composition in Earth materials varies due to the bacterial activity .
Certain sulfate reducing bacteria can reduce
Meteoritic standard was chosen because of the constancy of the sulfur isotopic ratio in meteorites , whereas the sulfur isotopic composition in Earth materials varies due to the bacterial activity .