Advanced Search
Current and Breaking News for Professionals, Consumers and Media



Click here to learn how to advertise on this site and for ad rates.

Research Author: Staff Editor Last Updated: Jun 3, 2014 - 12:53:16 PM



Blueberries Coated in Leaf Extracts Have Longer Shelf Life

By Staff Editor
Jun 3, 2014 - 12:46:46 PM



Email Newsletter icon, E-mail Newsletter icon, Email List icon, E-mail List icon Sign up for our Ezine
For Email Marketing you can trust


Email this article
 Printer friendly page

(HealthNewsDigest.com) - CORVALLIS, Ore. - An Oregon State University researcher has helped discover a substance in blueberry leaves - which are usually wasted - that can be added to berry coatings, extending their shelf life while adding antioxidants.

Working with an international team of scientists in China, OSU food scientist Yanyun Zhao found that an edible coating containing blueberry leaf extracts helped delay decay and retain water, which slowed down their natural deterioration. The extra weight could also mean extra cash for growers, because blueberries are often sold by volume.

The natural coatings can allow fresh blueberries to be washed and prepared as ready-to-eat products. Most blueberries in stores are unwashed because rinsing them removes their natural waxy coating that preserves the fruit.

"Normally, blueberry leaves fall to the ground as waste," said Zhao, a food science and technology professor in OSU's College of Agricultural Sciences. "We've discovered a use that can change how the berries are stored, sold, as well as increasing their nutritional value."

Blueberry leaves, which have been used as an herbal remedy, contain high levels of antioxidant phenolics - chemical compounds with antimicrobial properties that protect against fungi and bacteria, such as E. coli and Salmonella.

To create the coatings, researchers mixed these phenolic extracts with chitosan, a natural preservative that comes from crustacean shells. OSU tested coatings made from leaves that were picked at different stages of berry maturity, and leaf extracts were formulated into five different coating treatments based on varying levels of phenols.

Blueberries were dipped in the liquid coating and then dried at room temperature to form dried coatings. Nozzles can also spray the coatings on the surface of the berries as they pass by on a conveyor belt, according to Zhao, a value-added food products specialist with the OSU Extension Service.

Coating the blueberries will add to their cost, she said, although it's unclear how much.

The research was conducted in collaboration with scientists in China, including Yun Deng, at Shanghai Jiao Tong University at the school's Bor Luh Food Safety Center, and published in the journals of Food Control and Postharvest Biology and Technology.

-30-

About the OSU College of Agricultural Sciences: The college contributes in many ways to the economic and environmental sustainability of Oregon and the Pacific Northwest. The college's faculty are leaders in agriculture and food systems, natural resources management, life sciences and rural economic development research.

###

For Advertising and Promotion on HealthNewsDigest.com, call Mike McCurdy at 877-634-9180 or email him at [email protected]  We have over 7,000 journalists as subscribers and may use our content.



Top of Page

HealthNewsDigest.com

Research
Latest Headlines


+ New Clues to How Weight Loss is Regulated
+ Antibiotics May Help Salmonella Spread in Infected Animals
+ "Big Ideas' in Neuroscience Take on Stroke, Addiction and More
+ With Drug, Mouse Brains Form New Connections
+ Study Indicates Need for More Obstetric Quality of Care Measures at Hospitals
+ UF Researchers Use Plants to Study New Ways of Delivering Drugs for Pulmonary Hypertension
+ Concerns about Parabens in Health, Beauty and Personal Care Products
+ Are Nonprofit CEOs Overpaid?
+ Uncovering the Hidden History of AIDS’ Spread
+ Scrutinizing Salamanders to Study Scarring in Humans



Contact Us | Job Listings | Help | Site Map | About Us
Advertising Information | HND Press Release | Submit Information | Disclaimer

Site hosted by Sanchez Productions