Test tube
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A test tube is a kind of laboratory glassware, composed of a fingerlike length of glass tubing, open at the top, usually with a rounded lip at the top, and a rounded 'U' shaped bottom.
They range in size from a couple inches to several inches long, from a few millimeters to a couple centimeters in diameter. They are designed to allow easy heating of samples, to be held in a flame, and often are made of expansion-resistant glasses, such as borosilicate glass (known by brand-names such as Pyrex and Kimax).
Tests tubes are often preferred above beakers when multiple small chemical or biological samples have to be handled and/or stored.
Vacutainers are a type of test tube that can be used for both collection and storage of blood.
Laboratory | |
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Equipment | Agar plate - Aspirator - Bunsen burner - Calorimeter - Colorimeter - Centrifuge - Fume hood - Microscope - Microtiter plate - Plate reader - Spectrophotometer - Thermometer - Vortex mixer - Static mixer |
Flasks | Erlenmeyer flask, Florence flask, Volumetric flask, Büchner flask |
Other Glassware |
Beaker - Boiling tube - Büchner funnel - Burette - Conical measure - Crucible - Cuvette - Gas syringe - Graduated cylinder - Pipette - Petri dish - Separating funnel - Soxhlet extractor - Test tube - Thistle tube - Watch glass |