Coloured scanning electron micrograph (SEM) of pollen grains on material from the inner layers of a face mask. The inner layers are made from a meltblown fabric, a fine nonwoven fabric formed from fibres of thermoplastic resin, typically polypropylene, bonded by heat and or pressure. The more inner layers a face mask has, the more effective it is at filtering out particles. Magnification: x200 when printed at 15cm wide. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / EYE OF SCIENCE |
Bildgröße: | 6400 px × 5523 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
|