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    Three test tubes with various liquids in tube rack. — Stock Photo
    Three test tubes with various liquids in tube rack.
    Close-up of empty and sterile phials in red plastic box. — Stock Photo
    Close-up of empty and sterile phials in red plastic box.
    Empty and sterile phials in red plastic box. — Stock Photo
    Empty and sterile phials in red plastic box.
    Microcentrifuge sample tubes in styrofoam rack on blue background. — Stock Photo
    Microcentrifuge sample tubes in styrofoam rack on blue background.
    Underwater view of Surfer on Banzai Pipeline, Hawaii, USA — Stock Photo
    Underwater view of Surfer on Banzai Pipeline, Hawaii, USA
    Rack of test tubes with blood samples on blue background. — Stock Photo
    Rack of test tubes with blood samples on blue background.
    Close-up of pipette pipetting into microcentrifuge tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into microcentrifuge tubes in pathogenic laboratory.
    Smiling girl at playground — Stock Photo
    Smiling girl at playground
    Close-up of rack of microcentrifuge tubes with closed lids. — Stock Photo
    Close-up of rack of microcentrifuge tubes with closed lids.
    Blood sampling vacutainer tubes in rack, close-up. — Stock Photo
    Blood sampling vacutainer tubes in rack, close-up.
    Test tubes and Petri dishes in pathogenic laboratory. — Stock Photo
    Test tubes and Petri dishes in pathogenic laboratory.
    Rack of food samples in test tubes. — Stock Photo
    Rack of food samples in test tubes.
    Close-up of pipette pipetting into test tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into test tubes in pathogenic laboratory.
    Rack of test tubes with blood samples in laboratory. — Stock Photo
    Rack of test tubes with blood samples in laboratory.
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes.
    Senior man using incentive speedometer with tube. — Stock Photo
    Senior man using incentive speedometer with tube.
    Close-up of microcentrifuge tubes with various samples. — Stock Photo
    Close-up of microcentrifuge tubes with various samples.
    Rack of test tubes with blood samples on blue background. — Stock Photo
    Rack of test tubes with blood samples on blue background.
    Rack of test tubes with blood samples in laboratory. — Stock Photo
    Rack of test tubes with blood samples in laboratory.
    A bottle of vanilla extract and two vanilla pods in a glass tube — Stock Photo
    A bottle of vanilla extract and two vanilla pods in a glass tube
    Empty and sterile phials in red plastic box. — Stock Photo
    Empty and sterile phials in red plastic box.
    Biological samples in test tubes and Petri dishes on laboratory table. — Stock Photo
    Biological samples in test tubes and Petri dishes on laboratory table.
    Female researcher pipetting liquid in science laboratory. — Stock Photo
    Female researcher pipetting liquid in science laboratory.
    Tracheal intubation tools kit on table. — Stock Photo
    Tracheal intubation tools kit on table.
    Plastic test tubes in rack on white background. — Stock Photo
    Plastic test tubes in rack on white background.
    Single test tube with blood sample in rack. — Stock Photo
    Single test tube with blood sample in rack.
    Close-up of scientist hand holding test tube with fluorescent chemical fluid. — Stock Photo
    Close-up of scientist hand holding test tube with fluorescent chemical fluid.
    Plastic test tubes in rack on white background. — Stock Photo
    Plastic test tubes in rack on white background.
    Close-up of microcentrifuge tubes with blood samples. — Stock Photo
    Close-up of microcentrifuge tubes with blood samples.
    Close-up of pipette pipetting into test tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into test tubes in pathogenic laboratory.
    Female researcher pipetting liquid in science laboratory. — Stock Photo
    Female researcher pipetting liquid in science laboratory.
    Single test tube with blood sample in rack. — Stock Photo
    Single test tube with blood sample in rack.
    Empty and sterile phials in red plastic box. — Stock Photo
    Empty and sterile phials in red plastic box.
    Tubes for biological test in rack on blue background. — Stock Photo
    Tubes for biological test in rack on blue background.
    Three microcentrifuge tubes with pink liquid in tube rack. — Stock Photo
    Three microcentrifuge tubes with pink liquid in tube rack.
    Scientist gloved hand holding gene chip. — Stock Photo
    Scientist gloved hand holding gene chip.
    Cropped view of hands holding litmus paper in test-tube — Stock Photo
    Cropped view of hands holding litmus paper in test-tube
    Closeup view of a tube of white globules — Stock Photo
    Closeup view of a tube of white globules
    Rack of food samples in test tubes. — Stock Photo
    Rack of food samples in test tubes.
    Close-up of microcentrifuge tubes with blood samples. — Stock Photo
    Close-up of microcentrifuge tubes with blood samples.
    Sample tubes in container with ice in laboratory. — Stock Photo
    Sample tubes in container with ice in laboratory.
    Close-up of scientist holding rack of microcentrifuge tubes with red liquid. — Stock Photo
    Close-up of scientist holding rack of microcentrifuge tubes with red liquid.
    Single test tube with blood sample. — Stock Photo
    Single test tube with blood sample.
    Rack of test tubes with blood samples in laboratory. — Stock Photo
    Rack of test tubes with blood samples in laboratory.
    Oxygen mask and tube on white background. — Stock Photo
    Oxygen mask and tube on white background.
    Closeup view of a tube of wasabi on a white surface — Stock Photo
    Closeup view of a tube of wasabi on a white surface
    Single test tube with blood sample. — Stock Photo
    Single test tube with blood sample.
    Samples in tubes stored in container with ice. — Stock Photo
    Samples in tubes stored in container with ice.
    Underwater view of Surfer on Banzai Pipeline, Hawaii, USA — Stock Photo
    Underwater view of Surfer on Banzai Pipeline, Hawaii, USA
    Multichannel pipette pipetting into rack of tubes. — Stock Photo
    Multichannel pipette pipetting into rack of tubes.
    Intubation training dummy with tube. — Stock Photo
    Intubation training dummy with tube.
    Close-up of pipette pipetting into microcentrifuge tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into microcentrifuge tubes in pathogenic laboratory.
    Close-up of person hand pushing bulb of blood pressure gauge. — Stock Photo
    Close-up of person hand pushing bulb of blood pressure gauge.
    Rack of food samples in test tubes. — Stock Photo
    Rack of food samples in test tubes.
    Close-up View of hosepipe to watering green garden — Stock Photo
    Close-up View of hosepipe to watering green garden
    Close-up of pipette pipetting into test tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into test tubes in pathogenic laboratory.
    Close-up of scientist hand scanning tube with biological sample. — Stock Photo
    Close-up of scientist hand scanning tube with biological sample.
    Close-up of laboratory technician holding tube with blood sample in gloved hand. — Stock Photo
    Close-up of laboratory technician holding tube with blood sample in gloved hand.
    Food samples in test tubes on blue background. — Stock Photo
    Food samples in test tubes on blue background.
    Close-up of intensive care ward. — Stock Photo
    Close-up of intensive care ward.