Tubos de ensaio sobre fundo, azul tonificado - Banco de fotos e imagens

Laboratory test tubes

Test tubes, blue toned

Science laboratory test tubes

Close up of a pipette dropping a sample into a test tube on blue background

Test tubes on blue background

Test tubes on blue background

Close up of a pipette dropping a sample into a test tube on blue background

Test-tubes close-up

Test tubes on blue background

Blue water in a transparent test-tube on light background