Χέρια επιστήμονας, σε μια προστατευτική στολή και γάντια, κρατώντας ένα σωλήνα νερού για το δείγμα - Φωτογραφίες & Εικόνες Αρχείου

A man in a protective suit holds a Petri dish with a sample for plants and looks at the reaction in it after adding the reagent, top view

Hands in a protective suit and blue rubber gloves take a sample of algae near the river with tweezers for examination in the laboratory

An environmental laboratory specialist in a protective suit takes a sample of soil from the river bottom with tweezers for research, close-up

Scientist in a protective suit and mask, collects biomaterials from the water, for analysis, in a Petri dish

Scientist, in a protective suit and mask, collects water from the river for testing, in test tubes

Close-up of the hands of the scientist in protective gloves, collect materials with tweezers from the water in a Petri dish, for the sample

Hand in glove collects water in a test tube.

Hand in glove collects water in a test tube.

A man in a protective suit holds a petri dish with a sample for research and took off his glasses to look forward

A man in special protective clothing and a mask draws water from a river into a flask after discharges into the river, checking the river for environmental friendliness

A man in a protective suit and mask holds a test tube and a pipette with test water on the river after an accident

Environmental biologist in a protective suit and mask examines water from the river for viruses

A man in a protective suit takes soil samples into a Petri dish from treatment facilities, close-up

Hand of a laboratory assistant in a rubber glove holds a test tube with water taken for analysis

A man in a protective suit and mask looks away holding a flask with express test

Close-up of a Petri dish with a sample of plants from a pond for research in the hands of a laboratory worker, top view