Hembra en uniforme protector que muestra líquido irritante en pruebas de insecticida de tubo - Metraje y vídeo de stock

Woman in protective mask and respirator demonstrating inflammable liquid in tube

Scientist showing biohazardous liquid to camera, deathly weapons development

In a laboratory, a scientist with a pipette analyzes a colored liquid to extract the DNA and molecules in the test tubes. Concept: research, biochemistry, nature, pharmaceutical medicine

Worker of illegal fuel lab holding in hands test tube with flammable additive

Female scientist in protective mask demonstrating dangerous liquid in tube, lab

Chemist in white uniform demonstrating dangerous liquid in test-tube, viruses

Woman in protective mask and respirator demonstrating inflammable liquid in tube

Scientist showing biohazardous liquid to camera, deathly weapons development

Worker of illegal fuel lab holding in hands test tube with flammable additive

Female scientist in protective mask demonstrating dangerous liquid in tube, lab

Chemist in white uniform demonstrating dangerous liquid in test-tube, viruses

Worker of scientific lab holding test tube with biological hazard sign, harm