Tutkijan käsi kerää suojapuvussa ja käsineissä nestettä pulloihin ja koeputkiin testattavaksi joen taustaa vasten. - Kuvapankin valokuva ja kuva

Scientist's hand, in a protective suit and gloves, pours liquid from a flask into a pond

Environmental biologist in a protective suit on the shore of a reservoir conducts an express test of river water for pollution

A laboratory assistants hand in a rubber glove pours a blue reagent from a flask into a test tube with water to analyze the level

A man in special protective clothing analyzes the water from the river using special reagents and test tubes on the street

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, on a background of water

Flasks and test tubes for analysis against the background of nature

Hand in a blue glove holds a glass container with green grass on a suitcase, black and white photo

Scientist pipetting fertilizes the earth

Scientist conducting research to improve the soil

Blood and lung laboratory test concept

Gloved hands holding a petri dish with blood samples for coronavirus