Job offersmore »
- Product Manager Biostimulants - Westmaas, the Netherlands
- Corporate Grower - Camarillo (CA), USA
- General Manager China - Kunming, China
- Buyer greenhouse crops - Almeria, Spain
- Trucking Fleet Manager - Azerbaijan
- Fresh Produce Traders Required for a Leading Dutch/UK Fresh Produce Business
- Key Accountmanager Horticulture Glass
- Product & Applicatie Specialist Opkweek
- Assistant Grower - Canada
- Experienced International Buyer/Seller Germany
Top 5 - yesterday
- Nominees for the 2018 Fruit Logistica Innovation Awards are announced
- "We currently distribute 7,000 to 8,000 fruit baskets a week"
- Ecuador: Banana prices are expected to be high at the beginning of 2018
- Excessive temperatures worry Western Cape citrus farmers
- The new entry for the Crimson Snow family is the French Mesfruits
Top 5 - last week
Top 5 - last month
- Amazon: Steeper price cuts at Whole Foods Market
- Year-round produce for Canada’s most northern communities
- BILLA Online Shop: over 50% of the online shopping baskets contain fresh products
- South Australia agricultural exports have increased due to new airlines
- Turkish tomato exports shot up 46% in October
Exchange ratesmore »
Study: LEDs kill foodborne pathogens in fresh-cut foodA group of scientists from the National University of Singapore (NUS) recently discovered that blue light emitting diodes (LEDs) have a strong antibacterial effect on three major foodborne pathogens. Exposure to illumination from blue LED light can start the process within cells that ultimately those cause cells to die. This opens possibilities as a chemical-free option for food preservation.
The team tested the light’s effects on pathogens Listeria monocytogenes, E. coli and Salmonella typhimurium under temperature and pH conditions associated with storage of food products. Assistant professor Yuk Hyun-Gyun, who led the team, said that they tested the lights on fresh-cut fruits, such as papaya and mango, as well as on orange juice.
“It is too early to say the results because the results are not published yet,” he said. “According to our preliminary study, though, the illumination of blue LEDs effectively kills (more than 90 percent of population) salmonella cells on fresh-cut fruits at chilling temperatures.”
However, Hyun-Gyun notes that at ambient temperatures, blue LEDs only retard the growth of bacteria on the surface. However, in orange juice, blue LED with an irradiance of 92 mW/cm2 killed more than 99.9 percent of the population of salmonella at chilling temperatures within a couple of hours.
The team continues testing the antibacterial effect of blue LEDs (405 and 460 nm) with fresh-cut fruits. In addition, they have also tested the effects of other LEDs – blue, green and red – on physiochemical and nutritional quality changes of spinach and lettuce.
Publication date: 9/22/2015
Receive the daily newsletter in your email for free | Click here