Nitrogen cycle lab (ammonia and nitrogen)● Labware: Beakers, volumetric flasks, graduated pipettes, test tubes, solution storage bottles; microfuge tubes;● Store bought aquarium gravel (unused);● Gravel from an established (and healthy) aquarium....
Metabolism - Nitrogen Disposal, Urea Cycle, Ammonia: In animals that excrete ammonia as the main nitrogenous waste product (e.g., some marine invertebrates, crustaceans), it is derived from nitrogen transfer reactions [26] and oxidation via glutamate deh
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Furthermore, nitrate is widely distributed in industrial wastewater and contaminated groundwater, its conversion through the denitrification process is essential for restoring the global nitrogen cycle imbalance. Therefore, developing electrocatalytic NO3RR can enable a promising route for green NH3 ...
As whole-body production of metabolites is suppressed, amino acids with nitrogenous side chains accumulate during torpor, while urea cycle intermediates do not. Using 15N stable isotope methodology in arctic ground squirrels (Urocitellus parryii), we provide evidence that free nitrogen is buffered and...
Both ammonia-oxidizing bacteria (AOB) and the more recently discovered ammonia-oxidizingarchaea(AOA) perform the critical step ofoxidationof ammonia to nitrite in thenitrogen cycleof aquatic and terrestrial environments. Although manyAOBare available in culture, and much has been learned from thei...
The ISME Journal (2022) 16:272–283; https://doi.org/10.1038/s41396-021-01064-z INTRODUCTION Nitrification, the microbially mediated oxidation of ammonia (NH3) to nitrate (NO3−) via nitrite (NO2−), is a key process of the biogeochemical nitrogen cycle [1, 2] and is mostly driven...
Nitrate is a ubiquitous aqueous pollutant from agricultural and industrial activities. At the same time, conversion of nitrate to ammonia provides an attractive solution for the coupled environmental and energy challenge underlying the nitrogen cycle, by valorizing a pollutant to a carbon-free energy ...
However, limited progress has been made to date, as most electrocatalyst surfaces lack specificity towards nitrogen fixation. In this Review, we discuss the progress of the field in developing a mechanistic understanding of nitrogenase-promoted and molecular catalyst-promoted ammonia synthesis and provide...