To assess the quality of fresh fish and seafood, there are a few simple things to look for: Fresh whole fish should have bright, clear eyes; skin should be shiny, firm and elastic to the touch, gills should be red not brown, and if gutted, the cavity should be clean.o assess the quality of fresh fish and seafood, there are a few simple things to look for: Fresh whole fish should have bright, clear eyes; skin should be shiny, firm and elastic to the touch, gills should be red not brown, and if gutted, the cavity should be clean.
Drying oil. A drying oil is an oil that hardens to a tough, solid film after a period of exposure to air. The oil hardens through a chemical reaction in which the components crosslink (and hence, polymerize) by the action of oxygen (not through the evaporation of water or other solvents). Drying oils are a key component of oil paint and some varnishes.
Oil, or also either crude oil or just petroleum, is a flammable liquid that is naturally occurring. It is made up of a complicated combination of hydrocarbons and other fluid compounds, which are located in geologic formations underneath the surface of the Earth.il has been used by mankind ever since, and the U.S. is no exception. The history of the U.S. oil industry goes back to Edwin Drake and his drilling of an oil well in Pennsylvania in 1859. The following will discuss uses of oil and also its pros and its cons.