Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Silva, Juan L.

Committee Member

White, Shecoya

Committee Member

Schilling, M. Wes

Date of Degree

12-9-2022

Document Type

Graduate Thesis - Campus Access Only

Major

Food Science and Technology

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Food Science, Nutrition and Health Promotion

Abstract

Blueberry juice and pomace, enzyme pretreated (PT) or not, were extracted (EM) by steam and hot press methods. The pomace was further dried by convection oven (OD) or freeze-dried (FD). Juice yield was not affected by PT but was greater for steam extract (SE), due to water uptake. Carbohydrate and protein concentration were greater for hot-pressed (HP) pomace. Anthocyanins were not affected by PT or EM whereas phenolics were greater HP juice when subjected to enzymes. Dehydration method did not affect total phenolics when pomace was from HP but were higher in OD SE pomace. Enzymatic pretreatment had little influence on pomace quality, but HP pomace resulted in higher nutrients probably due to dilution. Oven drying resulted in slight degradation of pomace anthocyanins but not total phenolics. The dried pomace was shown to possess good nutrient quality and elevated functional components and can be used for value-added products.

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