Kéz a kékben védőkesztyűben, folyadékot önt a kémcsőből a folyómederbe - Stock fotó és kép

A man in a protective suit and gloves draws water from a stream using a pipette and a flask, close-up

A man in a protective suit stands in a river and pours water from a test tube into it with a reagent to analyze the level of pollution

A specialist in a protective suit and rubber boots draws water from a river into various test tubes using a pipette for analysis of environmental pollution

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

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, side view against the background of the river

Terrorist in a protective suit and gloves, pours liquid from a glass tube with poison, for infection, in reservoirs

Environmental laboratory specialist in protective suit and mask in a gutter pours water into a flask to study the level of pollution, close-up

Making sushi and rolls at home. Close Up of a man's hand

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

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

Laboratory assistant in a protective suit and mask performs an express analysis at the site of contamination of the reservoir

A man in a protective suit holds a test tube in his hands with a green reagent for conducting water analysis against the background of the river

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

Laboratory assistant in a protective suit and mask with a tablet in his hands writes down the results of his work

Close-up of a Petri dish with a sample of plants from a river into which a reagent for express research is poured from a test tube

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