focus on test tubes with pink and blue liquid in the arm of fully protected scientist
Close up of scientist pouring blue acid into test tube. Close up of a pipette pouring liquid into a test tube. Performing a liquid at scientific laboratory.
Biologist scientist putting solution liquid in test tube
Water purification test. Drop blue liquid in test tube with clean water. Scientist doing chemical experiment
Water purification test. Drop blue liquid in test tube with clean water. Scientist doing chemical experiment
Three scientists do chemical tests with multi-colored liquids in test tubes
Scientists discuss results of reaction of chemical liquids in test tubes
Close-up of scientist hands in safety glasses adding liquid to the plant in pot. There are different test-tubes and microscope on the table.
Close-up of scientist hands in safety glasses adding liquid to the plant in pot. There are different test-tubes and microscope on the table.
vintage scientist checking a book and his test tube findings
Scientist injecting chemicals into test tubes. Test tube of colored liquid on the lab table in the background of the glass flasks. poured from glass pipette into test tube illuminated with blue light