Versuchen, ernst zu sein. dunkelhaariger Mann, der die Arme auf den Tisch lehnt und Reagenzgläser in beiden Händen hält, während er den Prozess beobachtet - Stockfoto & -bild

It is locking task. Serious scientist looking attentively at test glass while bowing head and keeping mouth opened

Pouring down. Attractive medical worker wearing white smock and blue rubber gloves bowing head while looking at test-tube

Sure hand. Concentrated researcher keeping his mouth opened and sitting at workplace while doing analysis.

Biologists uniform. Good-looking alert smiling budding woman scientist wearing a uniform and glasses and holding a marker while being in the lab

Scientific study. Intelligent handsome researcher holding a metal stick while conducting his research

Modern research. Happy positive female scientist smiling and taking test samples for her research while working in the laboratory

Medical test. Serious attractive smart woman looking at the test tubes and taking vaccine samples for analysis while working in the test lab

Enjoy doing reseacrh. Positive experienced man dealing with bioengineering while working in a lab

Light room. Very attentive brunette keeping smile on her face while holding test-glass in left hand and going to checking it up

Biological tests. Selective focus of a test sample of the liquid being used in biological research

Measuring bottle. Delighted medical worker holding test glass in left hand while taking examples and going to examine them