Keto Pro Slim These rooms are automated rooms and connected to some tanks, which extract or provide the necessary acetyl gas (with an ethylene-like function emitted by the fruit itself). "Now everything has been computerized: with the press of two buttons, it matures more or less quickly depending on the urgency you have, and everything is programmed", adds Francisco Riego Martín, an expert in fruit and vegetable cultivation and treatment and manager of Martimar, one of the oldest and pioneer companies in fruit ripening. In the 50s, the methods were much more rudimentary, with calcium carbide stones and oil infills in poorly isolated rooms.