Physics teacher from Vietnam discovered a curious way to use beer or Coca-Cola. With their help, he was able to make fluorescent imaging of onion cells.
A photo: ferra.ruferra.ru
Carbon nanodots were also used in the experiment. These are particles with a diameter of no more than 10 nanometers, which have luminescent properties. These nanodots can be found in Coke and beer.
A Vietnamese teacher showed how to see the fluorescence of carbon nanodots with the help of available tools. It turned out that it is enough to illuminate Coca-Cola or beer with light of short wavelengths.
First, the physicist poured soda and beer into glasses and illuminated them with the light of purple (405 nanometers) and green (532 nanometers) laser pointers. Thus, traces of fluorescence could be seen. Then the teacher tried to use beer and coca-cola nanodots for fluorescent imaging of cells. He dipped peeled onion skins into water, cola, beer, and ethyl alcohol. Carbonated drinks were shaken well beforehand to remove the gas. Water washed the sample, and alcohol displaced it from the cells.
The skins soaked in drinks were then placed on a microscope stage and photographed through laboratory filters, illuminating them from below with laser pointers.
As a result, the teacher managed to photograph onion cells illuminated by carbon nanodots.