Frames can be made to hold the lenses in several different ways. There are three common styles: full frame, half frame, and frameless. Full frame glasses have the frame go all around the lenses. Half frames go around only half the lens; typically the frames attach to the top of the lenses and on the side near the top.
Ethanol is a monohydric primary alcohol. It melts at - 117.3Â°C and boils at 78.5Â°C. It is miscible (i.e., mixes without separation) with water in all proportions and is separated from water only with difficulty; ethanol that is completely free of water is called absolute ethanol.t is miscible (i.e., mixes without separation) with water in all proportions and is separated from water only with difficulty; ethanol that is completely free of water is called absolute ethanol.
Ethanol is a 2-carbon alcohol, responsible for the behavior-altering effects of Alcoholic Beverages, and for the devastation of the social and physical well being of alcoholics and their communities. This alcohol is a simple molecule, a carbohydrate, which is burned as a fuel supplying energy to cells. Ethanol in its disguise as a fuel can be considered a non-essential nutrient. But before it is metabolized as a fuel, it is an active brain-drug and an all-purpose cellular toxin. As a brain drug, ethanol acts to depress brain function from the top down, very much in the style of an anaesthetic. With low blood concentration, the cortical depression of ethanol seems to release behaviors that are otherwise inhibited. At this low level of mind intoxication, ethanol is useful and possibly pleasant.