Assistante de laboratoire en respirateur et gants bleus avec éprouvette dans les mains prélève un échantillon d'eau près du rivage du lac - Photo & image de stock

Chemist on river bank with test tube and water in hands

Chemist in respirator and blue gloves with test tube in hands takes sample of water near lake shore

Laboratory assistant with test tube, thumb up, blurred background

Ecologist with test-tube and mask, protective suit, finger down, sits on river bank

Biologist with test tube in mask, protective suit, finger down, sits on river bank

Laboratory assistant with bulb in hand on river bank in summer

Photography of environmentalist for examination takes water in reservoir

Ecologist with bulb and raised finger down on nature

Cropped image of male scientist in protective suit and mask putting sample of soil by tweezers in test flask outdoors

Photo ecologist from back and in protective suit with flask with water in hands on river bank

Photo of biologist in mask, protective suit with test tube, finger down, on river bank

Young biologist in protective suit takes water samples in river

Young environmentalist in protective suit takes water samples in river

Photo of chemist in protective suit on river bank,

Medical worker in protective suit, glasses, gloves with liquid soap in hands isolated on gray background in studio. Coronavirus epidemic

Human in protective suit, glasses, gloves with liquid soap in hands isolated on gray background in studio. Coronavirus epidemic

Doctor in protective suit, glasses, gloves with liquid soap in hands isolated on gray background in studio