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  4. Effects of LED and Fluorescent Light on the Flavor of Milk and Strategies to Mitigate Milk Oxidation.

Effects of LED and Fluorescent Light on the Flavor of Milk and Strategies to Mitigate Milk Oxidation.

File(s)
Chang_cornell_0058O_10169.pdf (1.6 MB)
Permanent Link(s)
https://doi.org/10.7298/X4MK6B21
https://hdl.handle.net/1813/56842
Collections
Cornell Theses and Dissertations
Author
Chang, Ana Carolina
Abstract

In this study, skim milk was exposed to LED and fluorescent light at 2000lx to compare their sensory thresholds, flavor profile and consumer acceptance. Additionally, the effectiveness of PET packaging and antioxidants in milk exposed to LED was determined. The LED sensory threshold was shorter than the fluorescent threshold and when antioxidants (tocopherols and ascorbic acid) were added, the majority of the panelists failed to discriminate milk exposed to LED light. Trained panelists described light exposed milk as significantly higher in cardboard and plastic, with LED exposure resulting in a slightly more plastic aroma, and fluorescent slightly more cardboard. Consumers preferred fluorescent exposed samples over the ones exposed to LED. The antioxidant and the LED engineered light treatments resulted in significantly higher old oil, however the former received higher packaging liking scores. The packaging treatment offered protection for 24 hours, with a similar flavor profile as unexposed milk, nevertheless consumers disliked its appearance.

Date Issued
2017-08-30
Keywords
Food science
•
Sensory
•
consumer
•
fluid milk
•
LED
•
light
Committee Chair
Dando, Robin
Committee Member
Mehta, Julia Leigh
Degree Discipline
Food Science and Technology
Degree Name
M.S., Food Science and Technology
Degree Level
Master of Science
Type
dissertation or thesis

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