It is true that heat and acid can cause proteins to denature, which means that they lose their 3-dimensional shape. A cooked egg white that becomes opaque and solid is an example. When milk is treated with acid, the protein casein curdles into a solid and the whey separates, still liquid.
The noun TOCCATA has 1 sense: 1. a baroque musical composition (usually for a keyboard instrument) with full chords and rapid elaborate runs in a rhythmically free style. Familiarity information: TOCCATA used as a noun is very rare.
It originated in northern Italy. Several publications of the 1590s include toccatas, by composers such as Girolamo Diruta, Adriano Banchieri, Claudio Merulo, Andrea and Giovanni Gabrieli, and Luzzasco Luzzaschi.