composizione elementare
1Pietro Biginelli — (July 25th 1860 –January 15th 1937) was an Italian chemist, who have discovered a three component reaction between urea, acetoacetic ester and aldehydes (Biginelli reaction). He also was studying various aspects of sanitation chemistry and… …
2madrigale — {{hw}}{{madrigale}}{{/hw}}s. m. 1 Breve componimento poetico, spec. di contenuto amoroso, di vario schema metrico. 2 Composizione polifonica profana fiorita soprattutto nei secoli XVI e XVII: i madrigali di Monteverdi. ETIMOLOGIA: dal lat. tardo… …
