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Fishless cycling is a form of "maturing" an aquarium. The goal of the process is to establish a robust colony of nitrifiers, with the ammonia source provided to allow nitrifiers ('beneficial bacteria,' although nitrifiers can also be archaea) to grow and reproduce coming from non-fish sources, hence 'fishless.'
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The reverse Krebs cycle, also known as the reverse TCA cycle (rTCA) or reductive citric acid cycle, is an alternative to the standard Calvin-Benson cycle for carbon fixation. It has been found in strict anaerobic or microaerobic bacteria (as Aquificales ) and anaerobic archea .
T-s diagram for the ideal/real ORC. The working principle of the organic Rankine cycle is the same as that of the Rankine cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device (turbine, [3] screw, [4] scroll, [5] or other expander), and then through a condenser heat exchanger where it is finally re-condensed.
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HLLE begins as small pits of receding epithelium (skin) around the fish's head and/or lateral line, and sometimes onto the unpaired fins.Rarely fatal, it does cause disfigurement, making the fish less suitable for public aquarium display.
With three gold medals on the road, the most successful Olympic road cyclist is Viatcheslav Ekimov of Russia and the Soviet Union (Ekimov had a fourth gold on the track). ). Only one rider has won gold in both the road race and the road time trial at the same Olympic Games; Remco Evenepoel of Belgium in Paris 2
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