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A kitchen hood in a small apartment. A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [1]
The roots of the company can be traced to the founding of three companies: the Aluminum Manufacturing Company founded by Joseph Koenig in Two Rivers, Wisconsin, in 1895; the Manitowoc Aluminum Novelty Company, founded in neighboring Manitowoc, Wisconsin, by Henry Vits in 1898; and the New Jersey Aluminum Company founded in 1890 in Newark, New Jersey.
A Soxhlet extractor is a piece of laboratory apparatus [1] invented in 1879 by Franz von Soxhlet. [2] It was originally designed for the extraction of a lipid from a solid material. Typically, Soxhlet extraction is used when the desired compound has a limited solubility in a solvent , and the impurity is insoluble in that solvent.