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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Rear view of businessman looking at chalkboard
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pretty young college student/young teacher writing on the chalkboard/blackboard during a math class (color toned image; shallow DOF)
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pretty young college student/young teacher writing on the chalkboard/blackboard during a math class (color toned image; shallow DOF)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Senior doctor/scientist using his tablet computer at work (color toned image)
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Young teacher and children painting and playing
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Senior doctor/scientist using his tablet computer at work (color toned image)
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Senior doctor/scientist using his tablet computer at work (color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Chemistry student and her teacher during class in lab, carrying out experiments under kind supervision of an experienced tutor
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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senior male researcher carrying out scientific research in a lab using a microscope (shallow DOF; color toned image)
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senior male researcher carrying out scientific research in a lab using a microscope (shallow DOF; color toned image)
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Senior researcher using a computer in the lab while working on an experiment (color toned image)
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Senior researcher using a computer in the lab while working on an experiment (color toned image)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab - dozing off for a while in a funny way (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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senior male researcher carrying out scientific research in a lab using a gas chromatograph (shallow DOF; color toned image)
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senior male researcher carrying out scientific research in a lab using a gas chromatograph (shallow DOF; color toned image)
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Portrait of a female researcher doing research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior male researcher carrying out scientific research in a lab (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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