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The teacher insanely screams at the students at the blackboard
Interaction between solutions of barium nitrate and sulfuric acid. Formation of a white precipitate of barium sulphate. Close-up
Young Female Doctor Explaining Anatomy with Human Skeleton
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A drop of liquid comes out of the needle of the syringe
Interaction of solutions of sodium hydroxide and copper II sulfate. The formation of a blue precipitate of copper II hydroxide
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Hand of Doctor With Embalming Syringe In Front Of A Body in Morgue close up
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A group of multiethnic doctors analyze and discuss the 3D fragment of the patient's skull printed using 3D printing technology to prepare for a surgical operation.
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Oncology pharmacist preparing chemothrapy drugs for treatment
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A person showing the reaction to the medical students
Doctor preparing vaccine. Green screen background for keying.
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4 in 1 - Chemistry Lab: Two Researchers Exploring New Reactions
Slow motion of mixing chemicals inside a test tube
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Top view of African American scientist examining drop of blood in flask during scientific experiment in the laboratory
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Interaction of solutions of sodium hydroxide and copper II sulfate. The formation of a blue precipitate of copper II hydroxide
the gloved hand of a doctor holding a vial of Russian covid-19 vaccine or Sputnik 5
crime expert is researching samples by microscope in scientific laboratory, female professional specialist\
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scientist working in a lab on developing a coronavirus vaccine
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