THE SULFUR-OXIDIZING PROKARYOTES. Biological oxidation of hydrogen sulfide to sulfate is one of the major reactions of the global sulfur cycle. Reduced inorganic sulfur compounds (referred to below as sulfur) are exclusively oxidized by prokaryotes, and sulfate is the major oxidation product. Sulfur oxidation in members of theEukarya is mediated by lithoautotrophic bacterial endosymbionts (44).
In simpler terms: the dew point, or frost point, is the temperature at which dew or frost will form should the air temperature fall sufficiently. Other things being equal, as the temperature falls, the relative humidity rises, reaching 100% at the dew point, at least at ground level.ew point temperature is never greater than the air temperature, since the relative humidity cannot exceed 100%.
Relative humidity is the amount of moisture in the air compared to what the air can hold at that temperature. When the air can't hold all the moisture, then it condenses as dew.