Scientists have received an environmentally friendly colourant from E. coli E. coli
The researchers from the University of Utah, led by Jixun Zhang, concluded that E. coli bacteria (colibacillus) can produce a dye of a saturated blue color, known as indigoidin.
To obtain a sufficient amount of dye, it was required to carry out a number of genetic manipulations with these bacteria. In the initial reproduction of the strain there is only one copy of the gene, so several copies of the gene were made to obtain the desired result, which significantly activated the bacteria.
The indigoigene obtained in the laboratory is treated and cleaned, which makes it safe to use as a dye in the food industry, in the beverage industry and in cosmetics. Scientists have already managed to issue a patent for their invention and are planning to begin its commercial application.
Russian scientists are also working in this direction. An alternative to synthetic dyes can be non-toxic ink that changes color due to changes in the nanostructure of the material to be treated.