Featured Research

from universities, journals, and other organizations

Edible Films Made From Dairy, Biofuel Byproducts

Date:
July 2, 2007
Source:
USDA/Agricultural Research Service
Summary:
Got film? A method developed by Agricultural Research Service (ARS) scientists uses byproducts -- not only from dairy processing, but also from biofuel production -- to create biodegradable protective films.

A continuous biodegradable protein film begins to form using the new ARS film-making process.
Credit: Photo by Paul Pierlott, USDA-ERRC/VGT

Got film? A method developed by Agricultural Research Service (ARS) scientists uses byproducts—not only from dairy processing, but also from biofuel production—to create biodegradable protective films.

Related Articles


The technology was developed by research leader Peggy M. Tomasula and her colleagues at the ARS Eastern Regional Research Center's Dairy Processing and Products Research Unit in Wyndmoor, Pa. They found that combining the milk protein casein with water and glycerol, a byproduct of biofuel production, produces a water-resistant film that can be used as an edible coating for food products.

The scientists used carbon dioxide as an environmentally friendly solvent to isolate dairy proteins from milk, instead of harsh chemicals or acids that can be difficult to dispose of, according to Tomasula. Carbon dioxide (CO2) is another byproduct of the glucose fermentation that is used to make ethanol. Using CO2 makes the edible film more water-resistant and biodegradable.

The resulting food coatings are glossy, transparent and completely edible. Like conventional food packaging, edible films can extend the shelf life of many foods, protect products from damage, prevent exposure to moisture and oxygen and improve appearance. By using renewable resources instead of petrochemicals, the scientists can create more biodegradable products and reduce waste.

Tomasula has been working with food technologist Kirsten L. Dangaran and chemist Phoebe X. Qi to improve the appearance and protective properties of the casein films.

At one point in the production process, CO2 dissolves into the milk, decreasing its pH level and causing casein to form particles of a substance known as CO2-casein. The researchers found that decreasing the size of the CO2-casein particles improved the films' ability to block moisture and increased their glossiness.

They also found that coating a low-density polyethylene film with the CO2-casein increased the film's ability to block oxygen permeation. Adjustments like these could make the films more competitive with existing, less eco-friendly products.

ARS is the U.S. Department of Agriculture's chief scientific research agency.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Edible Films Made From Dairy, Biofuel Byproducts." ScienceDaily. ScienceDaily, 2 July 2007. <www.sciencedaily.com/releases/2007/06/070628064219.htm>.
USDA/Agricultural Research Service. (2007, July 2). Edible Films Made From Dairy, Biofuel Byproducts. ScienceDaily. Retrieved January 29, 2015 from www.sciencedaily.com/releases/2007/06/070628064219.htm
USDA/Agricultural Research Service. "Edible Films Made From Dairy, Biofuel Byproducts." ScienceDaily. www.sciencedaily.com/releases/2007/06/070628064219.htm (accessed January 29, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, January 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dogs Bring on So Many Different Emotions in Their Human Best Friends

Dogs Bring on So Many Different Emotions in Their Human Best Friends

RightThisMinute (Jan. 28, 2015) From new-puppy happy tears to helpful-grocery-carrying-dog laughter, our four-legged best friends can make us feel the entire spectrum of emotions. Video provided by RightThisMinute
Powered by NewsLook.com
Scientists Say Earliest Snakes Lived Alongside The Dinosaurs

Scientists Say Earliest Snakes Lived Alongside The Dinosaurs

Newsy (Jan. 28, 2015) Wrongly categorized as lizard fossils, snake fossils now show the reptile could have developed earlier than we thought — 70 million years earlier. Video provided by Newsy
Powered by NewsLook.com
Scientists Hold Emergency Meeting to Save Endangered Rhinos

Scientists Hold Emergency Meeting to Save Endangered Rhinos

AFP (Jan. 28, 2015) Conservationists and scientists hold talks in Kenya to come up with a last ditch plan to save the northern white rhinoceros from extinction. Duration: 01:06 Video provided by AFP
Powered by NewsLook.com
Malnutrition on the Rise as Violence Flares in C. Africa

Malnutrition on the Rise as Violence Flares in C. Africa

AFP (Jan. 28, 2015) Violence can flare up at any moment in Bambari with only a bridge separating Muslims and Christians. Malnutrition is on the rise and lack of water means simple cooking fires threaten to destroy makeshift camps where people are living. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins