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MSc Thesis Defense - Yuwei Song
Start Date: 6/14/2018Start Time: 10:00 AM
End Date: 6/14/2018End Time: 11:00 AM
Event Description:

MSc. Thesis Defense:

Master of Science (Food Science)

Yuwei Song

“Effect of processing on bioaccessibility and antioxidant capacity of carotenoids from maize”
Thursday, June 14, 2018 at 10:00 am
245 Ellis

 

Abstract

This study has accessed the effect of processing (boiling, roasting, fermentation, fermented porridge and unfermented porridge) on bioaccessibility and antioxidant capacity (oxygen radical absorbance capacity (ORAC) and 2,2-diphenyl-1-picryhydrazyl (DPPH) free radical scavenging activity) of carotenoids (lutein, zeaxanthin, β–cryptoxanthin, α-carotene and β-carotene) from maize. All treatments decreased carotenoids. On average, boiling had the highest retention rate of 79.0%, followed by fermented porridge (73.8%), fermentation (68.4%), unfermented porridge (59.0%), and roasting had the lowest retention rate of 56.1%. Carotenoids bioaccessibility was obtained with three-stage in-vitro digestion. Without any cooking treatments, carotenoids recovery from raw maize ranged from 73.0-100.5%. After cooking treatments, carotenoids recovery showed varying levels of increase except for fermentation. The average carotenoids in whole digesta recovery following boiling, roasting, fermented porridge and unfermented porridge were 108.5%, 116.9%, 101.9% and 110.7%, respectively.

 

The Examining Committee:

Advisor: Dr. Trust Beta (Food and Human Nutritional Sciences)

Internal member: Dr. Bin Xiao Fu (Food and Human Nutritional Sciences)

Internal member: Dr. Nancy Ames (Food and Human Nutritional Sciences)

Chairperson:  Dr. Filiz Koksel (Food and Human Nutritional Sciences)

 


Location Information:
University of Manitoba - Fort Garry  (View Map)
University of Manitoba - Fort Garry
Winnipeg, MB
Canada

University of Manitoba - Fort Garry - Ellis Building  (View Map)
13 Freedman Crescent
Winnipeg, MB
Room: 245
Contact Information:
Name: Emily Gregorchuk
Phone: 2044746411
Email: Emily.Gregorchuk@umanitoba.ca

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