Related Experiment Video
Updated: Jun 17, 2026

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro
Published on: July 5, 2017
Jam processing and storage effects on blueberry polyphenolics and antioxidant capacity
Luke R Howard1, Chelsey Castrodale, Cindi Brownmiller
1Department of Food Science, University of Arkansas, Fayetteville, Arkansas 72704, USA. lukeh@uark.edu
Refrigerating blueberry jams helps retain beneficial polyphenols and antioxidant capacity. Storing at 4 degrees C preserves anthocyanins and procyanidins better than at 25 degrees C.
Area of Science:
- Food Science
- Nutritional Chemistry
Background:
- Blueberries are rich in polyphenols, known for their antioxidant properties.
- Jam processing and storage can impact the stability of these beneficial compounds.
Purpose of the Study:
- To investigate the effects of processing and storage conditions on blueberry jam quality.
- To quantify changes in polyphenolic content and antioxidant capacity.
Main Methods:
- Blueberry jams (sugar and sugar-free) were processed and stored at 4°C and 25°C for 6 months.
- Analysis included polyphenolic content, polymeric color, and antioxidant capacity (ORAC).
Main Results:
- Processing and storage led to losses in anthocyanins, procyanidins, and chlorogenic acid, but flavonols were retained.
- Storage at 4°C significantly preserved anthocyanins, procyanidins, and ORAC compared to 25°C.
- Sugar-free jams showed better retention of anthocyanins late in storage.
Conclusions:
- Refrigeration is crucial for maintaining the health-promoting compounds in blueberry jams.
- Storage temperature and sugar content influence the stability of bioactive components in fruit preserves.
More Related Videos
12:32Colletotrichum fioriniae Development in Water and Chloroform-based Blueberry and Cranberry Floral Extracts
Published on: April 12, 2019
10:25Construction of Models for Nondestructive Prediction of Ingredient Contents in Blueberries by Near-infrared Spectroscopy Based on HPLC Measurements
Published on: June 28, 2016
Related Concept Videos
Bioavailability: Influencing Factors
Principles of Food Preservation
Extraction: Effects of pH
Fruit Development, Structure, and Function
Methods of Controlling Food Spoilage
Factors Influencing Bioavailability: First-Pass Elimination