Abstract
Currently, ultraviolet-C (UV-C) has been used in food decontamination, representing an alternative to traditional strategies that are potentially harmful to the physical-chemical aspects of the food and the environment. This study evaluated the effectiveness of UV-C at 222 nm in the decontamination of tomatoes inoculated with Escherichia coli, and verified whether there is an extension of their shelf life, after treatments with light doses of 0; 0.90 ± 0.02; 1.70 ± 0.02; 3.40 ± 0.02; 7.0 ± 0.1; 14.0 ± 0.3; 27.5 ± 0.4 mJ/cm2. After applying UV-C light, a microbiological evaluation was done by counting viable colonies. In addition, physical analyses were performed. For this, the irradiated samples were kept in an incubator at 25 °C for 14 days; then, the colorimetric parameters, pH, and weight were quantified daily immediately after the irradiation cycle and at the end of the 14 days of observation. The microbiological results reaffirmed the effectiveness of UV-C 222 nm in surface decontamination of food. From the results of the microbiological analyzes, good decontamination values were obtained using the light dose of 3.40 ± 0.04 mJ/cm2 , with a reduction greater than four log. However, physical analyses did not identify a significant extension in shelf life, which also infers the absence of damage or physical impairment to the fruit development. In conclusion, UV-C at 222 nm effectively inactivates E. coli present on the surface of tomatoes without altering their physical characteristics.
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Claims 4
Claim · model-written summary
UV-C at 3.40 ± 0.04 mJ/cm2 reduced surface microbial counts by more than four log.
- Taxon
- tomatoes
Solanum lycopersicumt0 - Treatment
- light dose of 3.40 ± 0.04 mJ/cm2e0
- Interactor
- Escherichia coli
.jpg?width=60)
Escherichia colit0pathogen - Outcome
- decontamination valuese0
- Direction
- reductione0
- Value
- greater than four loge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“good decontamination values were obtained using the light dose of 3.40 ± 0.04 mJ/cm2 , with a reduction greater than four log.”
t0“decontamination of tomatoes inoculated with Escherichia coli”
Claim · model-written summary
UV-C did not significantly extend tomato shelf life.
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- UV-Ce1
- Outcome
- shelf lifee0
- Direction
- did not identify a significant extensione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physical analyses did not identify a significant extension in shelf life”
t0“far-UVC 222 nm in the decontamination and increase of shelf life of fruits”
e1“UV-C at 222 nm effectively inactivates E. coli present on the surface of tomatoes without altering their physical characteristics.”
Claim · model-written summary
UV-C at 222 nm inactivated E. coli on tomatoes without changing their physical characteristics.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- UV-C at 222 nme0
- Interactor
- E. coliEscherichia colie0pathogen
- Outcome
- E. coli present on the surface of tomatoese0
- Direction
- inactivatese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-C at 222 nm effectively inactivates E. coli present on the surface of tomatoes without altering their physical characteristics.”
Claim · model-written summary
UV-C did not alter tomato physical characteristics.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- UV-C at 222 nme0
- Outcome
- physical characteristicse0
- Direction
- without alteringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-C at 222 nm effectively inactivates E. coli present on the surface of tomatoes without altering their physical characteristics.”
The same questions in other papers
uv · quality: postharvest · Solanum lycopersicum (tomato)Results differ
1 paper in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.