The function of a test tube is to hold, mix or heat small quantities of liquid or solid chemicals for assays and qualitative experiments. Test tubes also serve as temporary storage for chemicals to be used in chemical experiments.Know More
Test tubes are usually made of borosilicate glass so they can resist reaction with chemicals and withstand temperature changes without breaking. Some test tubes are made from plastic and in most cases they are disposed of after use unlike the ones made from glass.
Test tubes come in several sizes and shapes. The standard laboratory test tube size measures 18 x 150mm. Test tubes that come without a lip are called culture tubes. They are usually used in biology for culturing live organisms such as bacteria, molds and seedlings. In medicine, culture tubes are used to store fluids and samples of blood.
Boiling tubes are essentially scaled-up test tubes. They are wider than normal test tubes to allow substances to boil violently. Other test tubes have stoppers or screw caps and these are the types that are used for temporary storage of biological samples or chemicals. Test tubes are also used for casual uses outside the laboratory environments where they can function like containers for holding a variety of items.Learn more in Chem Lab
A test tube holder's purpose is for holding test tubes in place, but they can also be useful for holding pipettes and stirring rods as well, and a test tube rack holds multiple test tubes in place. Some test tube racks can hold up to 40 test tubes. There are other racks designed for storing test tubes and holding even larger numbers of test tubes during a long period of time.Full Answer >
Test tube holders are used to distance a person from potentially dangerous tasks when using chemicals in test tubes. They not only extend a person's reach, they protect the user from harm while performing basic lab tasks.Full Answer >
A test tube holder is an apparatus designed to support and store test tubes during a scientific experiment. A test tube is a thin-glassed tube with one closed end used in the examination of cultures such as bacteria. Test tube holders may also be referred to as test tube racks.Full Answer >
A test tube rack is a wooden or plastic holder of test tubes in a laboratory. It has several small holes, each of which holds one test tube in an upright position. Test tube racks help keep a lab organized. They come in a variety of sizes.Full Answer >