Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Powerful mold-inhibiting bacteria patented

11.04.2005


Bacteria that produce lactic acid have been used for thousands of years to preserve food. Some lactic acid bacteria also produce several other mold-inhibiting substances and are therefore of special interest to agriculture and the foodstuffs industry. This is demonstrated in a dissertation by Jörgen Sjögren from the Swedish University of Agricultural Sciences, SLU. One of the bacteria strains studied has been patented and will be part of a new biological conservation preparation.



Humans have long used different micro-organisms to season and conserve foods. The Sumerians, for example, used yeast fungus to make beer 4,000 years ago. Other micro-organisms that humans have utilized for a long time are lactic acid bacteria and propionic acid bacteria. Lactic acid bacteria have been used to make cultured milk, cheese, yoghurt, and fermented sausage, and they are also put to work in silaging. Propionic acid bacteria have primarily been exploited in the production of certain large-hole cheeses, such as Swedish Grevé and Emmental.

Jörgen Sjögren has studied the fungus-inhibiting function of a number of strains of lactic acid bacteria and propionic acid bacteria in order to find strains that can be used to inhibit the growth of mold in silage, for instance. It has long been known that lactic acid bacteria and propionic acid bacteria produce the organic acids lactic acid, acetic acid, and propionic acid. All of these acids can inhibit mold fungi, but Jörgen Sögren and his associates have also seen that certain lactic acid bacteria and propionic acid bacteria moreover produce other substances (metabolites) with fungus-inhibiting properties. Twelve such substances are reported in the dissertation.


One lactic acid bacterium (Lactobacillus plantarum MiLAB 393) has been patented, and the rights have been sold to Medipharm, which this year is launching a biological conservation agent for silage in Europe.

An important element of the dissertation work involved finding an efficient method of isolating the fungus-inhibiting substances of bacteria, a method that is based on growing cultures in a water-based substrate, followed by centrifuging, filtering, stepwise fractionating, and finally determining the structure with the aid of nuclear magnetic resonance (NMR) and mass spectrometry (MS).

David Stephanson | alfa
Further information:
http://www.slu.se

More articles from Agricultural and Forestry Science:

nachricht New gene for atrazine resistance identified in waterhemp
24.02.2017 | University of Illinois College of Agricultural, Consumer and Environmental Sciences

nachricht Researchers discover a new link to fight billion-dollar threat to soybean production
14.02.2017 | University of Missouri-Columbia

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>