Un hombre con un traje protector sostiene una placa de Petri con una muestra para las plantas y mira la reacción en ella después de agregar el reactivo, vista superior - Foto e imagen de stock

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

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

A man in a protective suit holes in his hands a stand with test tubes in which reagents and test materials against the background of the river, top view

Laboratory worker takes samples from the bottom of the lake

Scientist in a protective suit and mask, releases into the pond bio plants for reproduction from a Petri dish

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

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

The scientist, in a protective suit and mask, took a plant with tweezers, for a sample and puts it in a Petri dish, close-up

Scientist in a protective suit and mask, collects materials from the pond in a Petri dish

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

The scientist, in a protective suit and gloves, takes the liquid from the river in test tubes, for a sample

Scientist in a protective suit and mask, holding a set of test tubes with water samples treatment facilities, on the background of water, on the right there is a place for the inscription

Hands of a laboratory assistant in rubber gloves take a soil sample on the river

A man in a protective suit does an express test-tube test on the river bank

Specialist in a protective suit and mask, on the pond, calls the mobile phone management, to report the results of the study, close-up

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

Hands scientist, in a protective suit and gloves, holding a tube of water for the sample