Abstract
One of the currently most important fungi in stored grains is Aspergillus flavus, which produce aflatoxins. This fungus can grow on diverse substrates and represents a serious public health and animal nutritional problem. Therefore, the study of techniques that can be applied to the control of aflatoxins is of great importance. The objective of the present study was to determine the effects of gamma radiation on the growth of Aspergillus flavus Link and on degradation of aflatoxin B1 and B2 (AFB1 and AFB2) at a relative humidity of 97 99% and a water activity (Aw) of 0.88-0.94. Samples of corn grains were irradiated using a cobalt 60 source emitting gamma rays at doses of 2, 5 and 10 kGy. Irradiation was found to be effective in reducing the number colony-forming units of A. flavus, per gram, in the corn samples analyzed. In addition, the fluorescent viability test (fluorescein diacetate and ethidium bromide) revealed a decrease in the number of viable cells with increasing irradiation doses and three different fluorescence patterns. Furthermore, irradiation induced a partial reduction in AFB1 and AFB2 levels at the doses of 2 and 5 kGy, whereas complete degradation of aflatoxins was observed in the assay employing 10 kGy.
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Claims 5
Claim · model-written summary
Irradiation reduced the number of colony-forming units of Aspergillus flavus per gram of maize.
- Treatment
- Irradiatione2
- Interactor
- A. flavus
Aspergillus flavuse2pathogen - Outcome
- number colony-forming units of A. flavuse2
- Direction
- reducinge2
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irradiated samples of maize”
e2“Irradiation was found to be effective in reducing the number colony-forming units of A. flavus, per gram, in the corn samples analyzed”
Claim · model-written summary
The number of viable Aspergillus flavus cells in maize decreased with increasing irradiation doses.
- Treatment
- increasing irradiation dosese3
- Interactor
- Aspergillus flavusAspergillus flavuse1pathogen
- Outcome
- number of viable cellse3
- Direction
- decreasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irradiated samples of maize”
e1“One of the currently most important fungi in stored grains is Aspergillus flavus, which produce aflatoxins”
e3“the fluorescent viability test (fluorescein diacetate and ethidium bromide) revealed a decrease in the number of viable cells with increasing irradiation doses and three different fluorescence patterns”
Claim · model-written summary
The fluorescent viability test showed three different fluorescence patterns for Aspergillus flavus in irradiated maize.
- Interactor
- Aspergillus flavusAspergillus flavuse1pathogen
- Outcome
- three different fluorescence patternse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irradiated samples of maize”
e1“One of the currently most important fungi in stored grains is Aspergillus flavus, which produce aflatoxins”
e3“the fluorescent viability test (fluorescein diacetate and ethidium bromide) revealed a decrease in the number of viable cells with increasing irradiation doses and three different fluorescence patterns”
Claim · model-written summary
Irradiation at 2 and 5 kGy partially reduced AFB1 and AFB2 levels in maize.
- Treatment
- 2 and 5 kGye4
- Interactor
- Aspergillus flavusAspergillus flavuse1pathogen
- Outcome
- AFB1 and AFB2 levelse4
- Direction
- reductione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irradiated samples of maize”
e1“One of the currently most important fungi in stored grains is Aspergillus flavus, which produce aflatoxins”
e4“Furthermore, irradiation induced a partial reduction in AFB1 and AFB2 levels at the doses of 2 and 5 kGy, whereas complete degradation of aflatoxins was observed in the assay employing 10 kGy”
Claim · model-written summary
Irradiation at 10 kGy completely degraded aflatoxins in maize.
- Treatment
- 10 kGye4
- Interactor
- Aspergillus flavusAspergillus flavuse1pathogen
- Outcome
- degradation of aflatoxinse4
- Direction
- complete degradatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irradiated samples of maize”
e1“One of the currently most important fungi in stored grains is Aspergillus flavus, which produce aflatoxins”
e4“Furthermore, irradiation induced a partial reduction in AFB1 and AFB2 levels at the doses of 2 and 5 kGy, whereas complete degradation of aflatoxins was observed in the assay employing 10 kGy”
The same questions in other papers
radiation · Aspergillus flavus · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
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.