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Chemistry student dripping liquid in test tube conducting experiment in lab
Female chemist looking at colored liquids in flasks, developing new substance
Female chemist studying presence of sediments in flask with red liquid in lab
Female chemist observing reaction holding test tube in hand, experimentation
Chemistry student mixing liquids in scientific laboratory, conducting experiment
Female scientist in laboratory looking to camera, equipment standing on table
Schoolboy watching reaction in tube with green liquid, chemistry lessons
Schoolboy looking at chemical substance in test tube, chemistry lesson, hobby
Boy in protective gloves and glasses writing down chemical experiments results
Little chemist in protective glasses checking reaction in tube with green liquid
Clever schoolboy adding drops of agent into tube with green reagent, chemistry
Schoolboy looking at sediment in flask and writing results, chemistry lesson