Close-up of a drop of blood on a syringe. In a blurred black background lies a test tube with blood. Close up syringe with red solution
A test tube of alkali solution on a white background. Isolate. Close-up
Mixing of alkali and phenolphthalein solution, chemical reaction. The test tube is close-up
Biologist scientist putting solution liquid in test tube
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
Close up of scientist adding solution with pipette on smoking blue fluid in test tubes. Chemist in research lab.
Chemical reaction. Stock footage. Small test tubes are tested with special solutions that boil.
Chemical reaction. Stock footage. Small test tubes are tested with special solutions that boil.
Scientist woman taking genetic solution from test tube with micropipette
A male Professor examines a test tube with a blue solution with a virus Covid
Chemist scientist taking dna solution from test tube with micropipette
A male Professor examines a test tube with a yellow solution with a virus Covid