Navigation Links
Assessing a new technique for ensuring fresh produce remains Salmonella-free
Date:9/17/2012

Researchers at the Institute of Food Research have tested a new technique to ensure fresh produce is free of bacterial contamination.

Plasmas are a mix of highly energetic particles created when gases are excited by an energy source. They can be used to destroy bacteria but as new research shows, some can hide from its effects in the microscopic surface structures of different foods.

Eating fresh fruit and vegetables is promoted as part of a healthy lifestyle, and consumers are responding to this by eating more and in a greater variety. Ensuring fruit and vegetables are free from contamination by food poisoning bacteria is crucial, as they are often eaten raw, without cooking or processing that kills off bacteria.

A move away from current chlorine-based decontamination is driving the search for new, safe ways of ensuring fresh fruit and vegetables are free from bacterial contamination without reducing quality or flavour. One technique being investigated is cold atmospheric gas plasma technology.

Plasmas can effectively inactivate microorganisms, and as they don't involve extreme conditions such as high temperature they have been suggested for use in decontaminating food surfaces without affecting the structure. Dr Arthur Thompson has been investigating how well cold atmospheric plasmas (CAP) inactivate Salmonella under different conditions and on different fresh produce foods at the Institute of Food Research, which is strategically funded by the Biotechnology and Biological Sciences Research Council.

Publishing in the journal Food Microbiology, Dr Thompson found Salmonella could be effectively inactivated by plasmas, but the length of exposure varied greatly depending on the type of produce. Other variables, such as the ambient temperature of the produce or the growth phase of the Salmonella had no significant effect. Inactivation on food surfaces took longer than on an artificial membrane filter surface.

To understand why, the researchers looked at the food surfaces with an electron microscope. At this microscopic level of detail, it was possible to see how Salmonella could 'hide' from the effects of the plasmas. Different structures, such as the bumps on the strawberries, the pores in lettuce leaves or the cell walls of potatoes create shadowed zones that block plasma reaching bacteria.

This study was conducted using a laboratory scale plasma device, used as part of ongoing research at IFR to study operational parameters and investigate precisely how cold plasma's destroy bacteria.

"The results suggest scaled up devices or combinations with other mild treatments could provide a very effective solution for destroying bacteria with little or no effect on the produce itself." said Dr Thompson. "What this study shows is that it will be important to take into account the type of food and its surface structure."


'/>"/>

Contact: Andrew Chapple
andrew.chapple@nbi.ac.uk
44-160-325-5111
Norwich BioScience Institutes
Source:Eurekalert  

Related biology news :

1. Screening technique uncovers 5 new plant activator compounds
2. New infrared spectroscopy technique
3. NIH-funded researchers restore sense of smell in mice using genetic technique
4. Researchers develop new, less expensive nanolithography technique
5. Triage for plants: NYBG scientists develop and test rapid species conservation assessment technique
6. UI researchers develop technique to help pollution forecasters see past clouds
7. Adoption of advanced techniques could propel crop improvement
8. Transgenic technique to eliminate a specific neural circuit of the brain in primates
9. New technique allows simulation of noncrystalline materials
10. Evaluation of microscopy techniques may help scientists to better understand ancient plants
11. New stem cell technique promises abundance of key heart cells
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Assessing a new technique for ensuring fresh produce remains Salmonella-free
(Date:4/26/2016)... 27, 2016 Research and ... Biometrics Market 2016-2020"  report to their offering.  , ... The analysts forecast the global multimodal biometrics ... during the period 2016-2020.  Multimodal biometrics ... such as the healthcare, BFSI, transportation, automotive, and ...
(Date:4/13/2016)... -- IMPOWER physicians supporting Medicaid patients in Central ... in telehealth thanks to a new partnership with higi. ... patients can routinely track key health measurements, such as ... when they opt in, share them with IMPOWER clinicians ... retail location at no cost. By leveraging this data, ...
(Date:3/22/2016)... , March 22, 2016 ... research report "Electronic Sensors Market for Consumer Industry by ... & Others), Application (Communication & IT, Entertainment, ... - Global Forecast to 2022", published by ... is expected to reach USD 26.76 Billion ...
Breaking Biology News(10 mins):
(Date:5/3/2016)... ... 2016 , ... In a list published by the Boston Business Journal, ... companies; a small percentage of the state's 615,000+ small businesses. The list examined companies ... revenue from 2012 to 2015. , As this award comes on the ...
(Date:5/3/2016)... , May 3, 2016 ... Assessing Developers and Producers of Those Competitor Biologics  ... to Companies, Activities and Prospects ,  Who ... companies? And what are their sales potentials? Discover, ... you see results, trends, opportunities and revenue forecasting. ...
(Date:5/2/2016)... ... 02, 2016 , ... Meister Media Worldwide launches its new ... added functionality give the agricultural world a taste of Meister Media Worldwide’s full ... – from precision farming via satellites and Unmanned Aerial Vehicles (UAVs) to indoor ...
(Date:4/29/2016)... ... 2016 , ... Amendia, Inc., a leading designer, developer, manufacturer ... completion of a significant transaction and partnership that positions Amendia for accelerated growth ... Kohlberg & Company, L.L.C. (“Kohlberg”), a leading private equity firm specializing in middle ...
Breaking Biology Technology: