Protecting soymilk flavor and nutrients from photodegradation.
Five different packaging treatments were studied over a 36-day period to determine if they protected soymilk from photo-oxidation. Soymilk was packaged in high-density polyethylene (HDPE) bottles with and without light protective additives (LPA). Two controls [(1) no LPA (translucent appearance); (2) a light-protected control (foil overwrap over no LPA control)] and three LPA-containing treatments, Low (0.6% TiO2), Medium (1.3% TiO2), High (4.3% TiO2) were studied. Bottles were stored in a lighted refrigerated display case (average light intensity between 800 to 2200 lux; 3°C) for 36 days and evaluated weekly. Soymilk packaged in high LPA bottles was protected from developing light-oxidized off-flavors and odors for a minimum of 15 days. High LPA bottles provided protection for riboflavin and controlled development of photooxidative products for approximately 29 days.
Department of Human Nutrition, Foods and Exercise, Wallace Hall, Virginia Polytechnic Institute and State University (Virginia Tech) Blacksburg, Virginia, 24061.
Laurie M
LM
Bianchi
Department of Food Science and Technology, Virginia Polytechnic Institute and State University (Virginia Tech) 1230 Washington St. SW, Blacksburg, Virginia, 24061.
Susan E
SE
Duncan
Fralin Life Science Institute, Virginia Polytechnic Institute and State University (Virginia Tech) 101B Fralin, West Campus Drive, Blacksburg, Virginia, 24061.
Janet B
JB
Webster
Kraft Foods Group, Kraft Foods North America 1701 West Bradley Ave., Champaign, Illinois, 61821.
Daryan S
DS
Johnson
Department of Food Science and Technology, Virginia Polytechnic Institute and State University (Virginia Tech) 1230 Washington St. SW, Blacksburg, Virginia, 24061.
Hao-Hsun
HH
Chang
Department of Food Science and Technology, Virginia Polytechnic Institute and State University (Virginia Tech) 1230 Washington St. SW, Blacksburg, Virginia, 24061.
Joseph E
JE
Marcy
Department of Food Science and Technology, Virginia Polytechnic Institute and State University (Virginia Tech) 1230 Washington St. SW, Blacksburg, Virginia, 24061.
Sean F
SF
O'Keefe
Light; oxidation; packaging; sensory