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Your search keyword '"King, Joan M."' showing total 8 results
Start Over Author "King, Joan M." Journal journal of food science
8 results on '"King, Joan M."'

3. Riboflavin photosensitized singlet oxygen oxidation of vitamin D

Author

King, Joan M. and Min, David B.

Subjects
Oxidation-reduction reaction -- Research, Vitamin B2 -- Research, Business, Food/cooking/nutrition
Abstract

Ascorbic acid is less effective than alpha-tocopherol in quenching singlet oxygen during the oxidation of vitamin D2 in the presence of 15 ppm riboflavin. This could be attributable to the fact that the stability of ascorbic acid is determined by the pH. This research aimed to prove the hypothesis that riboflavin-photosensitized singlet oxygen oxidation of vitamin D takes place. It also sought to establish the kinetics and mechanisms for quenching singlet oxygen oxidation of vitamin D. Oxidation of vitamin D was not seen in samples without riboflavin stored in the light or in samples with riboflavin stored in the dark.

Published
1998

4. Improving extraction of lutein from egg yolk using an ultrasound-assisted solvent method

Author

Xiaohua Hue, Zhimin Xu, Prinyawiwatkul, Witoon, and King, Joan M.

Subjects
Extraction (Chemistry) -- Methods, Saponification -- Analysis, Solvents -- Chemical properties, Business, Food/cooking/nutrition
Abstract

A comparison was made on the extraction yields of lutein from egg yolk using both hexane solvent (SOL) and ultrasound-assisted solvent (UA-SOL) extraction methods at different levels of saponification. Results revealed that alkaline significantly affected stability of lutein in egg yolk and resulted in underestimation of its concentration.

Published
2006

5. Physicochemical properties and consumer acceptance of wheat-germinated brown rice bread during storage time

Author

Charoenthaikij, Phantipha, Jangchud, Kamolwan, Jangchud, Anuvat, Prinyawiwatkul, Witoon, Hong Kyoon No, and King, Joan M.

Subjects
Consumer preferences -- Analysis, Germination -- Analysis, Cereal products -- Storage, Cereal products -- Quality management, Rice -- Storage, Rice -- Quality management, Wheat -- Physiological aspects, Business, Food/cooking/nutrition
Published
2010

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