Main colloidal instabilities in wine

20 Novembro 2020, 14:30 • Sofia Cristina Gomes Catarino

Main colloidal instabilities in wine: protein turbidity, colouring matter instability; metallic hazes (copper and iron cases). Stability tests. Stabilization treatments. Wine treatment with bentonite. Arabic gum.

Physical-chemical characterization and evolution control of the wines under students' responsibility: chromatic characteristics, total anthocyanins, degree of ionization of anthocyanins, ionized anthocyanins, total pigments, polymerization index, polymerized pigments, total phenols index, wine turbidity, fining tests

18 Novembro 2020, 14:30 • Sofia Cristina Gomes Catarino

Physical-chemical characterization and evolution control of the wines under students' responsibility: chromatic characteristics, total anthocyanins; degree of ionization of anthocyanins, ionized anthocyanins, total pigments, polymerization index, polymerized pigments, total phenols index; wine turbidity, fining tests

Analytical methods' description. Enological interest of each analytical determination/stability test.

Application of these analytical methods on the wines and discussion of the results.

Physical-chemical characterization and evolution control of the wines under students' responsibility: chromatic characteristics, total anthocyanins, degree of ionization of anthocyanins, ionized anthocyanins, total pigments, polymerization index, polymerized pigments, total phenols index, wine turbidity, fining tests

17 Novembro 2020, 14:30 • Sofia Cristina Gomes Catarino

Physical-chemical characterization and evolution control of the wines under students' responsibility: chromatic characteristics, total anthocyanins; degree of ionization of anthocyanins, ionized anthocyanins, total pigments, polymerization index, polymerized pigments, total phenols index; wine turbidity, fining tests

Analytical methods' description. Enological interest of each analytical determination/stability test.

Application of these analytical methods on the wines and discussion of the results.

Clarification of wines. Fining operation

13 Novembro 2020, 14:30 • Sofia Cristina Gomes Catarino

Clarification of wines. Fining operation: Mechanisms involved; Fining agents (mineral and protein).

Application of stability tests on the wines under students' responsibility.

11 Novembro 2020, 14:30 • Sofia Cristina Gomes Catarino

Application of stability tests on the wines under students' responsibility: tartrate stability, protein stability and browning potential. Discussion of the results.