Egy kék reagensű lombik és egy jegyzetfüzet közelítése egy tollal a vizsgálóhely hátteréhez - Stock fotó és kép

Water Purity Test, liquid in laboratory glassware

Water pollution concept. Woman scientist takes a water sample from polluted pond.

Water Purity Test. Chemical flask with water, lake or river in the background.

Liquid in chemical ware on a background of green plants, fertilizers or pesticides in the garden.

Water Purity Test, liquid in laboratory glassware

Water Purity Test. Chemical flask with water, lake or river in the background.

Female hand with a test tube and plant. Fertilizer in laboratory glassware.

Water Purity Test. Chemical flask with water, lake or river in the background.

Flasks and test tubes for analysis against the background of nature

Pours liquid from a test tube into a flask

One lens for correction of vision in a container for storage on a wooden background, close-up

Two flasks with a blue liquid in their hands, on white

Contact lens on the mirror and a cleaning container

Hand in a rubber glove holds a flask with a green plant, close-up

Container for storage of medical lenses for vision, in disassembled condition

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

Against the background of a photograph of a person with suspected coronavirus, a syringe with the drug and ampoules, close-up