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Some algae species are 50% or more lipid oil by weight. This oil may be pressed from the algae and refined into diesel. The process for extracting algal oil, at its simplest level, resembles pressing an olive. Up to 75% from the oil might be squeezed from algae using a simple mechanical press. Hexane might be used being a solvent to raise extraction up to 95%. Once extracted, the oil is refined through transesterification. A catalyst including sodium hydroxide is combined with alcohol to make biodiesel and glycerol.
After being forced to stop in the interval, the train group is allowed to return to the rear station.
If the child appears cold, the symptom is not serious, had better be in the home nurse, observe, do not take the child to the hospital easily, the personnel in the hospital is much, the bacterium is much, very easy appear cross infection. Also don't worry about the cold into pneumonia, pneumonia is a serious respiratory tract infection, systemic symptom must be heavier, and the child mental state is poor, and a cold there is obvious difference, don't ailment rectification.
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