.15 Ginseng production Suspension cultures of Panax ginseng plant cells are used to produce ginseng biomass for the health tonic market. The cells are grown in batch culture in a 2500-litre stirred bioreactor operated at 25C and 1 atm pressure. Over a period of 12 days, 5.5 3 106 litres of air at 25C and 1 atm are pumped into the reactor; off-gas containing 5.1 3 105 litres of oxygen leaves the vessel over the same period. About 135 kg of water is lost by evaporation during the culture. Estimate the cooling requirements.

i think the miocene epoch spans the time from 23 million to 12 million years ago.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.