Featured Research

from universities, journals, and other organizations

Good news for banana lovers: Help may be on the way to slow that rapid over-ripening

Date:
August 22, 2012
Source:
American Chemical Society (ACS)
Summary:
A solution finally may be at hand for the number one consumer gripe about bananas: their tendency to ripen, soften and rot into an unappetizing mush, seemingly in the blink of an eye. Scientists have described efforts to develop a spray-on coating that would delay the ripening of bananas.

Overripe bananas.
Credit: ibphoto / Fotolia

A solution finally may be at hand for the number one consumer gripe about bananas: their tendency to ripen, soften and rot into an unappetizing mush, seemingly in the blink of an eye.

Related Articles


Scientists speaking on August 22 in Philadelphia at the 244th National Meeting & Exposition of the American Chemical Society described efforts to develop a spray-on coating that consumers could use to delay the ripening of those 6.4 billion pounds of bananas that people in the U.S. eat every year.

The coating is a so-called "hydrogel," a superabsorbent material like those with many medical and commercial uses, made from chitosan, a substance derived from shrimp and crab shells. Xihong Li, Ph.D., who presented the report, noted that chitosan is attracting considerable attention in efforts to keep fruits and vegetables fresher longer due to its action in killing bacteria that cause produce to rot, low cost and other properties. Until now, however, it has not been used to slow the ripening of bananas.

"We found that by spraying green bananas with a chitosan aerogel, we can keep bananas fresh for up to 12 days," said Li, who is the study's leader. "Once bananas begin to mature, they quickly become yellow and soft, and then they rot. We have developed a way to keep bananas green for a longer time and inhibit the rapid ripening that occurs. Such a coating could be used at home by consumers, in supermarkets or during shipment of bananas."

Li explained that bananas, like other fresh fruit and vegetables, are alive and actually "breathing," or respirating. He is with Tianjin University of Science and Technology, Tianjin, China. Like other fresh fruit and vegetables, bananas stay alive after picking. Like people, bananas breathe, or respire, taking in oxygen and releasing carbon dioxide ― but through their skin. The more a banana respires, the quicker it ripens. Unlike many other fruits, the respiration rate in bananas does not slow down, and bananas do not ripen slowly. The banana's pulp releases a chemical that boosts respiration, and the pulp converts into the sugars that produce that sweet, banana taste. As respiration continues, however, the process speeds up, and bananas become unpleasantly sweet and mushy. Bacteria on the banana skin start to thrive and cause the banana to rot.

In their study, Li's team showed that the chitosan hydrogel coating slowed down respiration and killed bacteria that cause rotting, keeping bananas fresh for almost two weeks. But banana lovers should not go bananas over the hydrogel coating just yet. Li's team is on the trail of a new ingredient for producing the hydrogel that would replace an existing ingredient that would not be used commercially.

This study was supported by a National Natural Science Foundation of China Grant and the China Postdoctoral Science Foundation.


Story Source:

The above story is based on materials provided by American Chemical Society (ACS). Note: Materials may be edited for content and length.


Cite This Page:

American Chemical Society (ACS). "Good news for banana lovers: Help may be on the way to slow that rapid over-ripening." ScienceDaily. ScienceDaily, 22 August 2012. <www.sciencedaily.com/releases/2012/08/120822100813.htm>.
American Chemical Society (ACS). (2012, August 22). Good news for banana lovers: Help may be on the way to slow that rapid over-ripening. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2012/08/120822100813.htm
American Chemical Society (ACS). "Good news for banana lovers: Help may be on the way to slow that rapid over-ripening." ScienceDaily. www.sciencedaily.com/releases/2012/08/120822100813.htm (accessed October 30, 2014).

Share This



More Plants & Animals News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How A Chorus Led Scientists To A New Frog Species

How A Chorus Led Scientists To A New Frog Species

Newsy (Oct. 30, 2014) A frog noticed by a conservationist on New York's Staten Island has been confirmed as a new species after extensive study and genetic testing. Video provided by Newsy
Powered by NewsLook.com
Surfer Accidentally Stands on Shark, Gets Bitten

Surfer Accidentally Stands on Shark, Gets Bitten

AP (Oct. 30, 2014) A 20-year-old competition surfer said on Thursday he accidentally stepped on a shark's head before it bit him off the Australian east coast. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Ebola Inflicts Heavy Toll on Guinean Potato Trade

Ebola Inflicts Heavy Toll on Guinean Potato Trade

AFP (Oct. 30, 2014) The Ebola epidemic has seen Senegal and Guinea Bissau close its borders with Guinea and the economic consequences have started to be felt, especially in Fouta Djallon, where the renowned potato industry has been hit hard. Duration: 02:01 Video provided by AFP
Powered by NewsLook.com
Genetically Altered Glowing Flower on Display in Tokyo

Genetically Altered Glowing Flower on Display in Tokyo

Reuters - Innovations Video Online (Oct. 30, 2014) Just in time for Halloween, a glowing flower goes on display in Tokyo. Instead of sorcery and magic, its creators used science to genetically modify the flower, adding a naturally fluorescent plankton protein to its genetic mix. Ben Gruber reports. Video provided by Reuters
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