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. The amount of water vapour air can hold depends on temperature. Warm air can hold more water vapour than cold air because it is less dense, so has more capacity. Relative Humidity is the percentage of water vapour in the air, based on how much it can hold given its current temperature.When Relative Humidity reaches 100% the air is saturated with water vapour and cannot hold any more, this is know as the Dew Point.Dew points are measured by temperature, so the Dew Point of 15Â°C air with 25% humidity is 5Â°C.hen Relative Humidity reaches 100% the air is saturated with water vapour and cannot hold any more, this is know as the Dew Point. Dew points are measured by temperature, so the Dew Point of 15Â°C air with 25% humidity is 5Â°C.