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    Athlete in oxygen mask riding exercise bike with measuring of oxygen consumption. — Stock Photo
    Athlete in oxygen mask riding exercise bike with measuring of oxygen consumption.
    Forensic scientist measuring knife blade as forensic evidence. — Stock Photo
    Forensic scientist measuring knife blade as forensic evidence.
    Test tubes and baby pacifiers on plain background. — Stock Photo
    Test tubes and baby pacifiers on plain background.
    Pipette and petri dishes for blood testing. — Stock Photo
    Pipette and petri dishes for blood testing.
    Chinese doctor testing senior man blood pressure — Stock Photo
    Chinese doctor testing senior man blood pressure
    Hand of researcher holding vacutainer tube above pool of blood and syringe. — Stock Photo
    Hand of researcher holding vacutainer tube above pool of blood and syringe.
    Close-up of petri dishes and hand with pipette for genetic research. — Stock Photo
    Close-up of petri dishes and hand with pipette for genetic research.
    Close-up of DNA autoradiogram on white background. — Stock Photo
    Close-up of DNA autoradiogram on white background.
    Variety of potential drugs in pharmaceutical vials and test tubes. — Stock Photo
    Variety of potential drugs in pharmaceutical vials and test tubes.
    Variety of drugs on DNA autoradiogram, close-up. — Stock Photo
    Variety of drugs on DNA autoradiogram, close-up.
    Pipette placing sample into test tube during experiment in laboratory. — Stock Photo
    Pipette placing sample into test tube during experiment in laboratory.
    Electrician repairing switchbox in hospital. — Stock Photo
    Electrician repairing switchbox in hospital.
    Close-up of antibiotic testing in petri dish. — Stock Photo
    Close-up of antibiotic testing in petri dish.
    Swab sample from inside forensic evidence bag. — Stock Photo
    Swab sample from inside forensic evidence bag.
    Doctor giving young girl finger prick test. — Stock Photo
    Doctor giving young girl finger prick test.
    Variety of potential drugs in petri dish on DNA autoradiogram. — Stock Photo
    Variety of potential drugs in petri dish on DNA autoradiogram.
    Hand of researcher holding vacutainer tube above pool of blood and syringe. — Stock Photo
    Hand of researcher holding vacutainer tube above pool of blood and syringe.
    Scientist holding meat piece with tweezers for food research. — Stock Photo
    Scientist holding meat piece with tweezers for food research.
    DNA swab on genetic test results. — Stock Photo
    DNA swab on genetic test results.
    Close-up of petri dish and dropping pipette for genetic research. — Stock Photo
    Close-up of petri dish and dropping pipette for genetic research.
    Scientist closing lid of vial while laboratory testing. — Stock Photo
    Scientist closing lid of vial while laboratory testing.
    Close-up of blood sample in tube and syringe. — Stock Photo
    Close-up of blood sample in tube and syringe.
    Police evidence including finger print, DNA swab and results. — Stock Photo
    Police evidence including finger print, DNA swab and results.
    Doctor giving young girl finger prick test. — Stock Photo
    Doctor giving young girl finger prick test.
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Female scientist taking testing tube from tray for scientific research. — Stock Photo
    Female scientist taking testing tube from tray for scientific research.
    Person hand holding DNA swab and test results for forensic evidence. — Stock Photo
    Person hand holding DNA swab and test results for forensic evidence.
    Close-up of antibiotic testing in petri dish. — Stock Photo
    Close-up of antibiotic testing in petri dish.
    Close-up of blood sample in tube and syringe. — Stock Photo
    Close-up of blood sample in tube and syringe.
    Female scientist holding blood sample by microscope in laboratory. — Stock Photo
    Female scientist holding blood sample by microscope in laboratory.
    Hand in latex glove holding test tube with ear of wheat — Stock Photo
    Hand in latex glove holding test tube with ear of wheat
    Scientist holding petri dish with biohazard warning in microbiology lab. — Stock Photo
    Scientist holding petri dish with biohazard warning in microbiology lab.
    Engineer holding dial calipers over blueprints on table. — Stock Photo
    Engineer holding dial calipers over blueprints on table.
    Man having eye test with special equipment. — Stock Photo
    Man having eye test with special equipment.
    Scientist holding petri dish and swab. — Stock Photo
    Scientist holding petri dish and swab.
    Scientist pipetting sample into vial in laboratory. — Stock Photo
    Scientist pipetting sample into vial in laboratory.
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Blood sample in kidney dish with urine sample on table. — Stock Photo
    Blood sample in kidney dish with urine sample on table.
    Female scientist holding blood sample by microscope in laboratory. — Stock Photo
    Female scientist holding blood sample by microscope in laboratory.
    Close-up of petri dishes and pipette for genetic research. — Stock Photo
    Close-up of petri dishes and pipette for genetic research.
    Close-up of antibiotic testing in petri dish. — Stock Photo
    Close-up of antibiotic testing in petri dish.
    Electrician repairing switchbox in hospital. — Stock Photo
    Electrician repairing switchbox in hospital.
    Doctor giving young girl finger prick test. — Stock Photo
    Doctor giving young girl finger prick test.
    Petri dishes for DNA sequencing, close-up. — Stock Photo
    Petri dishes for DNA sequencing, close-up.
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Man having eye test with special equipment. — Stock Photo
    Man having eye test with special equipment.
    Preteen girl breathing into peak flow meter and looking at nurse. — Stock Photo
    Preteen girl breathing into peak flow meter and looking at nurse.
    Medical testing microscopes and equipment in laboratory. — Stock Photo
    Medical testing microscopes and equipment in laboratory.
    Male scientist doing medical testing of sample under microscope. — Stock Photo
    Male scientist doing medical testing of sample under microscope.
    Person in latex glove holding test tube with ear of wheat — Stock Photo
    Person in latex glove holding test tube with ear of wheat
    Multipipette and rack of vials for genetic research on white background. — Stock Photo
    Multipipette and rack of vials for genetic research on white background.
    Doctor giving young girl finger prick test. — Stock Photo
    Doctor giving young girl finger prick test.
    Scientist preparing chemical liquid in laboratory flask. — Stock Photo
    Scientist preparing chemical liquid in laboratory flask.
    Hand in latex glove holding peanut — Stock Photo
    Hand in latex glove holding peanut
    Scientist preparing chemical liquid in laboratory flask. — Stock Photo
    Scientist preparing chemical liquid in laboratory flask.
    Vials with red and blue liquids. — Stock Photo
    Vials with red and blue liquids.
    Close-up of antibiotic testing in petri dish. — Stock Photo
    Close-up of antibiotic testing in petri dish.
    Hand in latex glove holding raw meat — Stock Photo
    Hand in latex glove holding raw meat
    Wheat in petri dish, studio shot. — Stock Photo
    Wheat in petri dish, studio shot.
    Light microscope with petri dishes on blue background. — Stock Photo
    Light microscope with petri dishes on blue background.