German version
Supermarket products:
| onion | detergent without cellulases - Skip Standard Detergent, containing: < 5 % soap,5 - 15 % anionic and non-ionic | tensides, < 30 % zeolithes, enzymes (protease, lipase), foam regulators, scents, optical brighteners and bleaching agents, without phosphate and sulfate) Universal Detergent with cellulases and bleaching agents - Tandil | |
| Glass wares: |
| 3 gas collecting cylinders h = 10 cm d = 4 cm |
| 2 snap-cap vials 20 mL |
| 3 watch glasses |
Experimental procedure:
Three gas collecting cylinder are each filled with 50 mL of water. 3 g of the detergent with cellulases are added to one of the three cylinders. 3 g of detergent without cellulases are added to another cylinder. Yellow-brown colored onion shells are placed in each of the three cylinders. The mixtures are left at room temperature for some hours.
Results:
The water in the cylinder containing only water has turned yellow-brown, the color of the onion shells is nearly unchanged. The water containing the standard detergent has turned brown and the onion shells show a dark color. The onion shells in the third cylinder are completetely decolorized by the cellulase containing detergent. The water has a slight yellowish color.
Video clip (Download RealPlayer .rm file)
