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Cooling water in. 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.
Tweezers. Two types of modern-day conventional metal tweezers with pointed tips. A pair of bronze tweezers attributed to the Minoan civilization, c. 2900–1050 B.C. Tweezers are small hand tools used for grasping objects too small to be easily handled with the human fingers. Tweezers are thumb-driven forceps most likely derived from tongs used ...
Sodium bisulfate is an acid salt formed by partial neutralization of sulfuric acid by an equivalent of sodium base, typically in the form of either sodium hydroxide (lye) or sodium chloride (table salt). It is a dry granular product that can be safely shipped and stored. The anhydrous form is hygroscopic.
Rival retail stores are forced to reduce their prices if a category killer enters the market in a given geographic area. Examples of category killers include Toys "R" Us and Australia's Bunnings (hardware, DIY and outdoor supplies) and Officeworks (stationery and supplies for the home office and small office). Some category killers redefine the ...
A glass breaker is a hand tool designed to break through a window glass in an emergency. It is a common safety device found in vehicles to aid in the emergency extrication of occupants from a vehicle, as well as in some buildings. Most glass breakers are standalone devices containing a sharp pointed metal tip for glass-breaking tempered glass ...
A check dam is a small, sometimes temporary, dam constructed across a swale, drainage ditch, or waterway to counteract erosion by reducing water flow velocity. [1] Check dams themselves are not a type of new technology; rather, they are an ancient technique dating from the second century AD. [2] Check dams are typically, though not always ...
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