So, Mikhail Tsvet was trying to solve the separation problem of the green leaf pigments. He took a glass cylinder, filled it with chalk powder, and poured a little bit of the alcohol leaf extract on the top layer . The extract was brownish-green, and the top layer of chalk column also became the same […]
Imagine yourself in a rather large and almost empty room with an iron bed in the corner. Autumn. Cold. Gloomy. It has been raining for days and the roof is leaking. In the opposite corner on the ceiling the wet spot is slowly spreading; the rain drops are falling into the bucket on the floor. […]
Professor Tsvet filled a glass tube with finely ground powder of pure chalk, damped it with benzene, and then poured over a little bit of chlorophyll solution extracted from a fresh leaf. The very top layer of the powder was, of course, immediately colored green, and then Tsvet proceeded to slowly, drop by drop, add benzene, into the tube filled with chalk.