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Pipetting liquid into test tube. Photo : Jamie Grill
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Pipetting liquid into test tube. Photo : Jamie G...

Drop of blood on slide.
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Drop of blood on slide.

Drop of blood on slide.
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Drop of blood on slide.

Drop of blood on slide.
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Drop of blood on slide.

Scientist holding petri dish.
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Scientist holding petri dish.

Female scientist dropping liquid in petri dish.
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Female scientist dropping liquid in petri dish.

Scientists experimenting in pharmaceutical laboratory.
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Scientists experimenting in pharmaceutical laborat...

Lavender and lavender oil.
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Lavender and lavender oil.

Close up of scientist extracting liquid from beaker.
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Close up of scientist extracting liquid from beake...

Boy measuring liquid in beaker. Date : 2008
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Boy measuring liquid in beaker. Date : 2008

Girl measuring liquid in science class. Date : 2008
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Girl measuring liquid in science class. Date : 200...

Asian woman dropping liquid into petri dish.
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Asian woman dropping liquid into petri dish.

Close up of flower and bottle of oil.
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Close up of flower and bottle of oil.

Eyedropper and petri dish.
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Eyedropper and petri dish.