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A boiling tube is a large test tube intended specifically for boiling liquids. A test tube filled with water and upturned into a water-filled beaker is often used to capture gases, e.g. in electrolysis demonstrations. A test tube with a stopper is often used for temporary storage of chemical or biological samples.
The load in a laboratory centrifuge must be carefully balanced. This is achieved by using a combination of samples and balance tubes which all have the same weight or by using various balancing patterns without balance tubes. [2] It is an interesting mathematical problem to solve the balance pattern given n slots and k tubes with the same weight.
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Durham tubes are used in microbiology to detect production of gas by microorganisms. They are simply smaller test tubes inserted upside down in another test tube so they are freely movable. The culture media to be tested is then added to the larger tube and sterilized , which also eliminates the initial air gap produced when the tube is ...
Test Tube Rack. Test tube racks are laboratory equipment used to hold upright multiple test tubes at the same time. They are most commonly used when various different solutions are needed to work with simultaneously, for safety reasons, for safe storage of test tubes, and to ease the transport of multiple tubes.
The sample is placed in a cuvette and the cuvette is placed in a spectrophotometer for testing. The cuvette can be made of any material that is transparent in the range of wavelengths used in the test. The smallest cuvettes can hold 70 microliters, while the largest can hold 2.5 milliliters or more.
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 safely held while heating.
Brown glass jars with some clear lab glassware in the background Laboratory glassware may be made from several types of glass , each with different capabilities and used for different purposes. Borosilicate glass is a type of transparent glass that is composed of boron oxide and silica, its main feature is a low coefficient of thermal expansion ...