Sentences with phrase «direct nitrogen fixation»
They focus on modifications with nitrogen, developing a technique with direct nitrogen fixation, carbon - nitrogen bond formation, at the broken edges of graphite frameworks using ball - milling graphite in the presence of nitrogen gas.
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The Brookhaven - made nitrogen isotope enabled direct quantification of biological nitrogen fixation and provided evidence for biological transport and metabolism by the host plant.
Intense efforts have been directed toward understanding the mechanism of biological nitrogen fixation.
Limited direct impacts of atmospheric CO2 on nitrogen - fixation have been found in soil biological crusts (Billings et al., 2003), but soil microbial activity beneath shrubs has been observed to increase, thus reducing plant - available nitrogen (Billings et al., 2002).