ガラスの上に血液サンプルを採取する科学者のトリミングされたビュー - ストックフッテージ＆ビデオ

Young boy pours chemical reagents which is precipitates in test tube with liquid, focus at fingers and tube

Young boy holds chemical tube above fire burner on table, closeup

Cropped view of scientist shaking flask with blood

Cropped view of scientist adding blood drops with pipette at laboratory glass

Selective focus of african american scientist in glasses looking at blood sample in flask

Cropped view of doctor giving blister pack with pills to patient

Selective focus of african american scientist in glasses using microscope with sunlight on background

Rack focus of kid looking at burning powder