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The 1 well rack is designed to hold only one test tube or any tube that fits in the space. It is normally made of epoxy-coated steel wire [ 6 ] but can also be made of polystyrene. The racks made from polystyrene are friction-fit and can only hold tubes that match in size to the rack.
It is used for holding a test tube in place [2] when the tube is hot or should not be touched. [3] For example, a test tube holder can be used to hold a test tube while it is being heated. [4] Moreover, when heating the tube with liquid or solid contained inside, the holder ought to tightly hold a test tube [5] in order for the tube to be ...
Laboratory drying rack can contain and dry up various types of laboratory glassware such as beaker, Erlenmeyer flask, volumetric flask, and graduated cylinder. Laboratory drying rack is usually used to dry up the tube in the laboratory; for example, it can help in drying test tube, boiling tube, and Thiele tube.
The tube is usually held by its neck with a clamp or tongs. By tilting the tube, the bottom can be heated to hundreds of degrees in the flame, while the neck remains relatively cool, possibly allowing vapours to condense on its walls. A boiling tube is a large test tube intended specifically for boiling liquids.
Wire gauze may be woven from metals including iron, [5] steel, [6] copper, [7] and nichrome. [8] Nichrome alloy provides long life expectancy and tear resistance. [ 5 ] [ 8 ] The edges of the wire gauze are turned inward to help prevent fraying, [ 5 ] improve handling, and eliminate sharp protruding wire ends.
Test tubes are used by chemists to hold, mix, or heat small quantities of solid or liquid chemicals, especially for qualitative experiments and assays; Desiccators of glass construction are used to dry materials or keep material dry.
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