Mano de científico, en un traje de protección y guantes, verter líquido azul en un frasco, sobre el fondo de las tuberías de alcantarillado - Foto e imágenes de stock

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

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

Scientist's hand, in a protective suit and gloves, collects liquid into flasks and test tubes, for testing, against the background of the river

Flasks and test tubes for analysis against the background of nature

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

Pours liquid from a test tube into a flask

Hands in rubber gloves pour a blue chemical liquid in a flask, on a white background

Scientist pipetting fertilizes the earth

Scientist conducting research to improve the soil

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

Gloved hands holding a petri dish with blood samples for coronavirus