“But some researchers have developed a preservation technique called vitrification, essentially glassifying cells.”

“Current methods involve many solvent extraction cycles and vitrification after nitric acid treatment and evaporation.”

“All these form a most fusible mixture, and the silica present is only in such proportion as is necessary for vitrification.”

“It is during vitrifaction, however, that the secret formulas and the skilled hand of the artist are decisive.”

“The vitrifaction or vitrified fraction of the instant invention is made conventionally in a smelter or the like.”

“An excessively high temperature of the mixture causes its vitrifaction and loss of its permeability to air, which prevents this circulation of air.”