A scientist mixing some content in an Erlenmeyer flask
A scientist in a lab mixing some content in an erlenmeyers flask
A scientist in a lab mixing a red content in an erlenmeyers flask looks into camera and smiles
A scientist in a lab putting some chemicals into an erlenmeyers flask due to test the hardness of the water - the water is soft and the content becomes blue
A young scientist holding, mixing and looking at an erlenmeyers flask with a blue content in it...
Scientist examines a container with mold
Lab worker examines a flask with a liquid
Woman examines a liquid in a flask in the light
Male scientist examining flask with liquid in lab
A scientist examines the contents of a flask of water from a local pond
A scientist examines the contents of a flask of water from a local pond.
A scientist examines the composition of water in a local pond among the bags of garbage. Ecology and water pollutionZ Dscf 0171 O
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