Total concentration. Brunette professional male laboratorian working with pipette for dropping liquid in vials while they placing in stand - Stock Photo & Image

Woman chemist working in hospital clinic lab

Female chemist working in hospital lab

Laboratory diagnosis of synthetic substances, Scientist or researcher examines the substance in vitro and record information, Lab experiments, Researchers scientist working analysis with test tube.

Young chemist student working in lab on chemicals

Young hispanic man wearing scientist uniform holding test tube at laboratory

Scientists experiment with synthetic substances from nature to modify the genetics or DNA of plants to be resistant to disease, Lab experiments, Researchers scientist working analysis with test tube.

Organic chemistry. Selective focus of test tubes standing on the shells while being looked at by nice smart male chemist

Chemical lab. Selective focus of test tube with chemical reagents being held by a nice professional male chemist

Modern science. Serious intelligent pleasant man sitting at the table and holding a test tube while working in the lab