Femme scientifique tenant une pipette avec un liquide et prenant un tube à essai avec un réactif - Photo & image de stock

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