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Four-wheel drive, or 4WD in short, was the best way to navigate rough terrain with your sports utility vehicle for many years, but all-wheel drive, also known as AWD in short, appears to have taken over industry and has become available even on midsize sedans in addition to SUVs. Though many people believe these are same form of vehicle feature, these are, in fact, quite different.
While that box of popcorn can certainly be classified as processed foods, it's also a nutritious meal for some. The difference lies with additives like butter, cheese and caramel, for starters. A person that grabs a bowl of air popped or even a bag of reduced-fat popcorn for lunch is really eating a nutritious and filling meal. So, is popcorn a real unhealthy foods?
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.
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