They are called:
- Test tubes
- Cultural tubes
- Sample tubes
A test tube holder or rack is used in a laboratory to hold or support test tubes containing chemicals or other contents awaiting further operations. Although it is called a test tube holder, it is also used to hold/support pipettes, etc. Since a test tube has a rounded bottom, it cannot stand by itself; the rack is a convenient and necessary piece of laboratory equipment for the storage of test tubes.
A test-tube holder, also known as test-tube clamp or test-tube rack, is used to hold a test tube over a Bunsen burner during heating. It is designed to ensure safe handling and prevent accidents while working with test tubes and heat sources.
A test tube holder is a piece of laboratory equipment designed to securely hold test tubes while they are being handled or stored. It typically consists of a spring-loaded clamp that can accommodate test tubes of different sizes, and a handle for easy manipulation.
A test tube rack is a piece of laboratory equipment used to hold and organize test tubes. It typically has openings where test tubes can be inserted securely in an upright position. Test tube racks are used to store, transport, or organize test tubes during experiments and laboratory work.
According to the American Heritage Dictionary of the English Language, a test tube is a "clear, cylindrical glass tube usually open at one end and rounded at the other, used in laboratory experimentation."A test tube can be used to store chemicals that are dangerous to skin,or be connected to other lab equipment for experiments. In this case, it is usually to collect a useful product.
The test tube holder has many functions. It can be used to hold test tubes, making it easy to investigate the contents of the test tubes. These holders can also be used to hold stirring rods used in the laboratory and pipettes.
You can buy specific test tube holders made of metal, which grip the tube. Alternatively, a large wooden clothes peg with one handle longer than the other. However, this latter design cannot be used when heating the tube with a Bunsen Burner.
Test tube holders have much more use in biology than in chemistry. They can allow you to (micro)pipette into many samples at once and generally support many reactions. They allow a test tube to stand up unassisted in a waterbath. The reason a test tube is curved at the bottom, i'd imagine is because if the bottom was square, the grooves would catch and adhere samples and also samples could not be vortexed.
Test tube holders are devices used to safely hold test tubes during experiments or when heating substances over a Bunsen burner. They help protect the user from potential burns or spills and provide a secure grip when handling the test tubes.
A test tube rack.
It is a glass tube and it is used to contain substances being tested!
A test tube holder, also known as a test tube clamp or test tube rack, is used to hold a test tube securely in place during experiments and handling. It provides a firm grip to prevent the test tube from slipping or breaking.
Clamping a test tube
Test tube holder
to hold the test tube
Test Tube brushes are used to easily clean the test tubes .
use to hold test tube..