Theses and Dissertations

ORCID

https://orcid.org/0000-0002-3155-7720

Issuing Body

Mississippi State University

Advisor

Silva, Juan L.

Committee Member

Schilling, M. Wes

Committee Member

Matta, Frank B.

Committee Member

Shaw, Donna A.

Date of Degree

12-9-2022

Document Type

Graduate Thesis - Open Access

Major

Food Science, Nutrition, and Health Promotion

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Food Science, Nutrition and Health Promotion

Abstract

Frozen, thawed and osmotically-dehydrated highbush (HB) (Vaccinium corymbosum) and rabbiteye (RB) (V. virgatum) blueberries were analyzed under a scanning electron microscope (SEM) to observe microstructural differences in their skin. Rabbiteye blueberries of both frozen, thawed and osmotically-dehydrated treatments, had thicker skins than highbush blueberries. Rabbiteye blueberries, collected from local farms, packed and blast frozen (PBF), had thinner skins than individually quick-frozen (IQF) blueberries. Washing berries prior to freezing had no effect on skin thickness. Sensory analysis of samples determined there were no differences (p > 0.05) between PBF and IQF methods and species with respect to skin intactness, grittiness, sweetness, and blueberry flavor. IQF berries obtained from one farm had tougher skin (p ≤ 0.05) than other berries regardless of treatment. RB were rated lower in juiciness and higher in grittiness than HB berries whereas LH berries were rated lower in shriveling and higher in skin intactness.

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