(AP) -- Phil DeVore pulls a folded piece of aluminum from a murky pond. The aluminum looks like a piece of siding that's blown off a building, but DeVore knows it's much more valuable than that. He slips a rubber band off the aluminum and unfolds it. He likes what he sees -- 50 or 60 glistening black leeches. They're your common ribbon leeches, Nephelopsis obscura to aquatic biologists.
Storing Used Oil. Used oil can be successfully stored in a cool, dark place for up to a month. Refrigeration or freezing increases the oilâs lifespan by several months. The oil may become cloudy during storage but this is not harmful and the oil will become clear upon reheating.
Palm Oil. One problem with oils is that they eventually go rancid. Some are more stable than others. Castor oil has a very long shelf life. Flax oil will turn rancid in fifteen minutes at room temperature.Coconut oil lasts about five years, but just after three years you can taste a difference.Partially Hydrogenated oils have a very long shelf life too.astor oil has a very long shelf life. Flax oil will turn rancid in fifteen minutes at room temperature. Coconut oil lasts about five years, but just after three years you can taste a difference. Partially Hydrogenated oils have a very long shelf life too.