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Each one must contain the same amount. Closeup of an unrecognizable scientist pouring a substance into test tubes to do experiments on inside of a laboratory during the day
Laboratory assistants are investigating chemical reactions, medical scientists, chemical researchers, chemical experiments and disease testing from patient blood samples. Medicine and research concept
Medical insurance during a pandemic. Close up medical doctor in uniform and gloves puts vaccine antiretroviral coronavirus covid 19 on a test tubes flask with virus.
Forensic scientist conducting criminal investigation aganist laboratory background. Holds cotton swab with sample of dna and a test tube in his hand. Tets paternity concept.
Chemistry experiment and test tube in hand in science class on table Scientist education concept with glass flask in laboratory research and development concept
