1. South African Grape and Wine Research Institute (SAGWRI), Department of Viticulture and Oenology Stellenbosch University Stellenbosch South Africa
2. Department of Physics Stellenbosch University Stellenbosch South Africa
3. Instituto de Ingeniería de Alimentos para el Desarrollo (IIAD), Departamento de Tecnología de Alimentos Universidad Politécnica de Valencia Valencia Spain