The House of Science Museum of Seville exhibits to the public from November 27 until January 12 the temporary exhibition “Mushrooms”, which is one of the main offers of the Museum for the winter months. The exhibition is made up of a selection made of copper, the collection of lyophilized mushrooms that Antonio Trescastro, recently deceased, built for more than twenty years, and that during most of his professional life he worked as a maintenance technician and scientific disseminator at the Station Experimental del Zaidín (EEZ), center of the Higher Council for Scientific Research (CSIC) located in Granada.
The exhibition will consist of explanatory panels and 27 dioramas where there will be more than one hundred examples of lyophilized mushrooms. The exhibition wants to serve as a tribute to the dedication of Antonio Trescastro, the form of self-education and the dedication of many additional hours of work to his technical functions, to make an exclusive collection unique in Spain. Freeze-drying is a method to remove the water content of a sample, whether of animal or plant origin. In an interview that Trescastro himself offered to the CSIC Scientific Culture team in 2015, he explains the process with these words: “Water has three states: solid, liquid and gas. The process begins with the collection of mushrooms in the field. They are then cleaned well in the laboratory and frozen. They are then introduced into the lyophilizer, where the water it contains will pass from a solid state to a gaseous state without passing through a liquid; That is called sublimation. After 24 or 48 hours in the freeze dryer they will come out completely dry and we can see the water they have lost. However, they will maintain the structure, the color and will be able to keep it that way, provided they do not hydrate, for a lifetime ”