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Hand of a lab technician, pharmacist or doctor holding a test tube adding a chemical solution from a pipette during a test or experiment watched by colleagues or students
Woman doctor lab filling test tube with medical solution. Lab doctor doing medical research. Female lab technician working in medical laboratory with pipette close up. Pharmaceutical research
Man scientist or technologist doing experiment in a laboratory pipetting a chemical solution from a beaker held in him gloved hand as he sits behind a row of test tubes in a rack
Chemist doing tests in a laboratory carefully pipetting a chemical solution onto a potted plant with an array of colored test tubes, beakers and a microscope in front of him
Lab technician controls chemical substances in test tubes
Clinical testing. Lab experiment in glass flask. Pouring blue reagent in pure solution. Closeup of chemical reaction in lab flask. Laboratory research. Lab research in lab flask. Chemical analysis
Mixing of alkali and phenolphthalein solution, chemical reaction. The test tube is close-up
Scientist doing experiments on a potted plant in a chemical laboratory pipetting a solution onto the top leaves in a close up view of his hands with lab glassware visible behind
Close up handheld footage of chemist pouring solution with pipette in a reactive blue liquid. Test tubes with blue liquid.
Female scientist in protection gear using a pipette to take a sample of smoking blue fluid. Test tubes with blue solution.
Young female scientist looking down a microscope in a laboratory surrounded by colorful chemical solutions in test tubes and beakers
Crop young female scientist looking down a microscope in a laboratory surrounded by colorful chemical solutions in test tubes and beakers
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