Bacteria That Converts Sugars in Veggies, Fruits into Bioplastics!

by Savitha C Muppala on  November 23, 2010 at 3:06 PM Environmental Health
RSS Email Print This Page Comment
Font : A-A+

It is now possible for researchers to 'train' bacteria to convert some of the key sugars in vegetable, fruit and garden waste into 'green' products like bioplastics.
 Bacteria That Converts Sugars in Veggies, Fruits into Bioplastics!
Bacteria That Converts Sugars in Veggies, Fruits into Bioplastics!

By adapting the eating pattern of bacteria and subsequently training them, NWO and TU Delft Researcher Jean-Paul Meijnen succeeded in converting sugars in processable materials, so that no bio-waste is wasted.

Lignocellulose, the complex combination of lignin and cellulose present in the stalks and leaves of plants that gives them their rigidity, is such a material.

"Unfortunately, the production of plastics from bio-wastes is still quite an expensive process, because the waste material is not fully utilized," Meijnen said.

The pre-treatment of these bio-wastes leads to the production of various types of sugars such as glucose, xylose and arabinose. These three together make up about eighty per cent of the sugars in bio-waste.

The problem is that the bacteria Meijnen was working with can only digest glucose but not xylose or arabinose, thus leaving eighty per cent remains unused.

"A logical way of reducing the cost price of bioplastics is thus to 'teach' the bacteria to digest xylose and arabinose too," he said.

The bacteria are genetically modified by inserting specific DNA fragments in the cell; this enables them to produce enzymes that assist in the conversion of xylose into a molecule that the bacteria can deal with.

This method did work, but not very efficiently: only twenty per cent of the xylose present was digested. The modified bacteria were therefore 'trained' to digest more xylose.

Finally, in a separate project Meijnen succeeded in modifying a strain of Pseudomonas putida S12 that had previously been modified to produce para-hydroxybenzoate (pHB).

He tested the ability of these bacteria to produce pHB, a biochemical substance, from xylose and from other sources such as glucose and glycerol.

"This strategy also proved successful, allowing us to make biochemical substances such as pHB from glucose, glycerol and xylose. In fact, the use of mixtures of glucose and xylose, or glycerol and xylose, gives better pHB production than the use of unmixed starting materials. This means that giving the bacteria pretreated bio-wastes as starting material stimulates them to make even more pHB."

The study will be presented at TU Delft on Monday 22 November 2010.

Source: ANI

Post a Comment

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.
Notify me when reply is posted
I agree to the terms and conditions

Related Links

More News on:

Shigellosis Why Do We Eat - Nutrition Facts Diet Lifestyle and Heart Disease MRSA - The Super Bug The Acid-Alkaline balance, Diet and Health Acid Base Dietary Balance and its Influence on Our Health and Wellbeing Nails - Health and Disease Fruits to Help Lower Blood Pressure Health benefits of bananas Sugar: Time to Look beyond Its Sweetness 

News A - Z

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

News Search

Medindia Newsletters

Subscribe to our Free Newsletters!

Terms & Conditions and Privacy Policy.

Advertisement
Advertisement

Stay Connected

  • Available on the Android Market
  • Available on the App Store

Facebook

News Category

News Archive