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Three microcentrifuge tubes with pink liquid in tube rack.
Close-up of sample on red liquid in centrifuge tube.
Scientist holding DNA sample in tube with autoradiograph on DNA gel.
Close up of female scientist pippetting sample into eppendorf tube for analysis in laboratory
Close up of pipette dropping solution into test tubes in rack in lab
Empty PCR tubes on black background.
Pipetting droplets of liquid into eppendorf tubes, side view
Pipette adding sample to a test tube in a laboratory
Close up of Scientist holding liquid in test tubes
Close-up of multipipette sampling liquid into tube rack in laboratory.
Close-up of pipette and tubes for automated blood sample testing.
Three test tubes with various liquids in tube rack.
Pipetting drops of liquid into eppendorf tubes, high angle view
Blood sample in tube on blue background.
Close-up of pipetting blood sample into microcentrifuge tubes.
Plastic test tubes in rack on white background.
Microcentrifuge sample tubes in styrofoam rack on blue background.
Germany, Pipetting pink liquid into test tubes, close up
Researcher pipetting DNA sample into eppendorf vial in laboratory
Pipetting sample into vial for testing
Pipette dripping liquid into test tubes.
Young woman scientist pipetting sample into vial in a laboratory used for chemical and DNA testing
Close-up of pipetting sample into plastic micro-centrifuge tube.
Close-up of pipetting sample into microcentrifuge tubes.
Person dropping blood sample into vial with pipette.
Close up of scientists hand holding blood sample on a glass microscope slide for medical testing
Close-up of pipetting sample into plastic micro-centrifuge tube rack.
PCR micro tube strip with red liquid.
Cropped view of graduated pipette pipetting liquid into test tubes
Female scientist using pipette for dropping liquid into eppendorf tubes.
Scientist pipetting sample in microcentrifuge tube for chemical analysis.
Scientist pipetting liquid into Eppendorf tubes.
Pipetting liquid into test tubes, close-up.
Close-up of pipetting liquid into Eppendorf tubes.
Test tubes and Erlenmeyer flask in laboratory
Cropped image of female hand pipetting yellow liquid into test tubes in lab
DNA test result on microcentrifuge tube with DNA sample in scientist hand.
Blood samples in centrifuge tubes on white background.
Female scientist pipetting liquid into Eppendorf tubes.
Laboratory sample tubes in rack.
Colorful Eppendorf tubes in rack on white background.
Scientist hand holding micro-centrifuge tube containing biological sample.
Sample tubes in container with ice in laboratory.
Close-up of pipettes and tubes for automated blood sample testing.
Single test tube with blood sample in rack.
Human hand pipetting blue liquid into test tubes
Close-up of pipetting liquid into test tubes
Tubes for biological test in rack on blue background.
Close-up of pipetting colorful liquids into test tubes.
Sample tube with blue liquid in pink rack.
Human hand pipetting pink liquid into test tubes
Close-up of tubes for automated blood sample testing.
Test tubes with red liquid in rack.
Close-up of scientist holding rack of microcentrifuge tubes with red liquid.
Scientist hand pipetting samples into microcentrifuge tubes.
Cropped view of scientist pipetting samples into microcentrifuge tubes.
Close-up of blood sample in tube and syringe.
Close-up of scientist fingers holding microcentrifuge tube with blue liquid.
Close up shot of pipette in test tube
Close-up of hand adjusting tap on burette tube in pharmaceutical laboratory.