Related Experiment Video
Updated: Jul 25, 2026

Isolation and Biophysical Study of Fruit Cuticles
Published on: March 30, 2012
Drying, Physical, Nutritional and Bioactive Characteristics of Apple Peel Flour Subjected to Blanching and Ultrasound
Joyce Lavinia Faria de Chaves1, Roger Elpídio Guimarães Dias1, Thiago Thomas Barboza1
1Food Technology Department, Federal Institute of Education, Science and Technology of Paraná, Colombo, Brazil.
Abstract:
The aim of this work was to study the effect of blanching and ultrasound pretreatments on drying and quality characteristics of apple peel. Blanching was conducted in boiling water, ultrasound in a water bath, and drying in a batch tray dryer. The product obtained was ground into a flour, and assessed for color, water activity, proximate composition, sugars, and bioactive compounds. Results showed that effective moisture diffusivity increases with a decrease in product moisture content, being such dependence well described by a second order polynomial model. Average drying rate was higher and product moisture content was lower for blanched and sonicated flour, especially for the former. Such result suggests that blanching and ultrasound enhance water removal during drying of apple peel. Physical properties were significantly affected by pretreatments, being more intense red color and lower water activity obtained for sonicated flour. Nutritional and bioactive properties were also significantly affected by pretreatments, being lower sugar, higher protein, fiber, catechin and epicatechin content observed for blanched flour. Summarizing, blanching and ultrasound pretreatments improve drying of apple peel, both regarding process efficiency and product quality.
More Related Videos
05:55High-throughput, Microscale Protocol for the Analysis of Processing Parameters and Nutritional Qualities in Maize Zea mays L.
Published on: June 16, 2018
10:18Author Spotlight: Exploring Seaweed's Bioactive Compounds for Sustainable Innovations in Industries
Published on: November 21, 2023
Related Concept Videos
Detergent Purification of Membrane Proteins
Drying Shrinkage
A portion of this drying shrinkage can be reversed; if the concrete is...
Pasteurization and Food Preservation
Downstream Processing