noha Posted September 28, 2022 Share Posted September 28, 2022 Hello, I want to know the meaning of discharge and gradient in the following context: In the absence of sunlight, vent chemistry supports chemolithotrophic prokaryotes that synthesize sugars by oxidizing hydrogen sulfide and other geofuels including hydrogen, methane, ammonia, ferrous iron, and manganese. (This is analogous to the photosynthetic capture of CO2 powered by electrons obtained from water and energized by light absorption.) According to one model, the discharge of alkaline water through the porous chimneys of white smokers would have created a natural pH gradient in ancient oceans that might have served as a foundation for the origin of cells. I think discharge means flow gradient : gradual change not sudden change, what do you think? Link to comment Share on other sites More sharing options...
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