Mixing of alkali and phenolphthalein solution, chemical reaction. The test tube is close-up
Biologist scientist putting solution liquid in test tube
The test tube is filled with water on a white background. Isolate. Close-up
A male Professor examines a test tube with a blue solution with a virus Covid
A male Professor examines a test tube with a yellow solution with a virus Covid
Chemist scientist african woman taking dna solution from test tube
Close up of test tube and pipe for mixing solutions in laboratory on desk. Medical research equipment in glassware used on testing and chemistry experiment with microscope and computer
Chemical process. Stock footage. A small test tube with a green chemical solution that is mixed.
Chemical process. Stock footage. A small test tube with a green chemical solution that is mixed.
Focused blonde female doctor working with test tube and chemical solutions
Close up of glassware for fluid solution or dna in laboratory on desk. Chemistry tray with sample test tubes for scientific experiment. Blood and liquid flasks prepared for analysis
Tilt up slowmo of disabled female scientist in protective coveralls, goggles, gloves and face mask inspecting solution in test tubes in lab