Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts
The objective of this work was to assess the efficacy of sodium hypochlorite and peracetic acid for sanitization of Brazil nuts. To evaluate the natural microbiota of the nuts, the total bacteria and fungi as well as the Aspergillus section Flavi were counted. The moisture, water activity and the pr...
| Autor principal: | Ribeiro, M. S. S |
|---|---|
| Outros Autores: | Freitas-Silva, O, Castro, I. M, Teixeira, A, SIlva, Silvia Helena Marques da, Moraes, A. C. S. Sales, Abreu, L. F, Sousa, C. L |
| Grau: | Artigo |
| Idioma: | eng |
| Publicado em: |
Elsevier
2020
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| Assuntos: | |
| Acesso em linha: |
http://patua.iec.gov.br//handle/iec/4077 |
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ir-iec-4077 |
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ir-iec-40772020-04-06T19:32:31Z Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts Ribeiro, M. S. S Freitas-Silva, O Castro, I. M Teixeira, A SIlva, Silvia Helena Marques da Moraes, A. C. S. Sales Abreu, L. F Sousa, C. L Hipoclorito de S?dio / administra??o & dosagem ?cido Perac?tico / administra??o & dosagem Desinfetantes / antagonistas & inibidores Aspergillus / isolamento & purifica??o Bertholletia / microbiologia An?lise Microbiol?gica Nozes / microbiologia The objective of this work was to assess the efficacy of sodium hypochlorite and peracetic acid for sanitization of Brazil nuts. To evaluate the natural microbiota of the nuts, the total bacteria and fungi as well as the Aspergillus section Flavi were counted. The moisture, water activity and the presence of aflatoxins was quantified. The response surface method was used to determine the influence of exposure time and sanitizers concentration on the reduction of Aspergillus nomius inoculated on the nuts. Microbiological, sensory and quantification analyzes of aflatoxins were performed under optimum conditions The evaluation of the initial contamination of the nuts, despite presenting high microbiological contamination, humidity and water activity, was not detected aflatoxins in any samples. In artificially inoculated samples, the response surface and the desirability function were obtained to determine the optimal point of use for each sanitizer. The nuts had high microbiological contamination, moisture content and water activity. Aflatoxins were not detected in any samples. The response surface and desirability function indicated the optimal sanitization conditions were 250 mg/L and 8.5 min and 140 mg/L and 15 min for sodium hypochlorite and peracetic acid, respectively. Reductions greater than 2 log CFU/g were obtained with sodium hypochlorite and of 1 log CFU/g for peracetic acid. In the tests performed with new Brazil nuts samples under the optimized conditions, reductions of less than 2 log CFU/g were obtained. Aflatoxin B1 was detected in one untreated sample (1.51 ?g/kg), one sample treated with sodium hypochlorite (0.60 ?g/kg) and two samples treated with peracetic acid (0.64 and 0.72 ?g/kg). Demonstrating that the sanitizers in the concentrations used had no action on aflatoxins, despite being efficient for fungal control. The treatments did not cause an unacceptable sensorial impact on the samples. 2020-04-06T18:49:05Z 2020-04-06T18:49:05Z 2020 Artigo RIBEIRO, M. S. S. et al. Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts. Food Microbiology, v. 90, n. xx, e103449, 2020. 0740-0020 http://patua.iec.gov.br//handle/iec/4077 10.1016/j.fm.2020.103449 eng Acesso Embargado application/pdf Elsevier |
| institution |
Instituto Evandro Chagas (IEC) |
| collection |
PATUA |
| language |
eng |
| topic |
Hipoclorito de S?dio / administra??o & dosagem ?cido Perac?tico / administra??o & dosagem Desinfetantes / antagonistas & inibidores Aspergillus / isolamento & purifica??o Bertholletia / microbiologia An?lise Microbiol?gica Nozes / microbiologia |
| spellingShingle |
Hipoclorito de S?dio / administra??o & dosagem ?cido Perac?tico / administra??o & dosagem Desinfetantes / antagonistas & inibidores Aspergillus / isolamento & purifica??o Bertholletia / microbiologia An?lise Microbiol?gica Nozes / microbiologia Ribeiro, M. S. S Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts |
| topic_facet |
Hipoclorito de S?dio / administra??o & dosagem ?cido Perac?tico / administra??o & dosagem Desinfetantes / antagonistas & inibidores Aspergillus / isolamento & purifica??o Bertholletia / microbiologia An?lise Microbiol?gica Nozes / microbiologia |
| description |
The objective of this work was to assess the efficacy of sodium hypochlorite and peracetic acid for sanitization of Brazil nuts. To evaluate the natural microbiota of the nuts, the total bacteria and fungi as well as the Aspergillus section Flavi were counted. The moisture, water activity and the presence of aflatoxins was quantified. The response surface method was used to determine the influence of exposure time and sanitizers concentration on the reduction of Aspergillus nomius inoculated on the nuts. Microbiological, sensory and quantification analyzes of aflatoxins were performed under optimum conditions The evaluation of the initial contamination of the nuts, despite presenting high microbiological contamination, humidity and water activity, was not detected aflatoxins in any samples. In artificially inoculated samples, the response surface and the desirability function were obtained to determine the optimal point of use for each sanitizer. The nuts had high microbiological contamination, moisture content and water activity. Aflatoxins were not detected in any samples. The response surface and desirability function indicated the optimal sanitization conditions were 250 mg/L and 8.5 min and 140 mg/L and 15 min for sodium hypochlorite and peracetic acid, respectively. Reductions greater than 2 log CFU/g were obtained with sodium hypochlorite and of 1 log CFU/g for peracetic acid. In the tests performed with new Brazil nuts samples under the optimized conditions, reductions of less than 2 log CFU/g were obtained. Aflatoxin B1 was detected in one untreated sample (1.51 ?g/kg), one sample treated with sodium hypochlorite (0.60 ?g/kg) and two samples treated with peracetic acid (0.64 and 0.72 ?g/kg). Demonstrating that the sanitizers in the concentrations used had no action on aflatoxins, despite being efficient for fungal control. The treatments did not cause an unacceptable sensorial impact on the samples. |
| format |
Artigo |
| author |
Ribeiro, M. S. S |
| author2 |
Freitas-Silva, O Castro, I. M Teixeira, A SIlva, Silvia Helena Marques da Moraes, A. C. S. Sales Abreu, L. F Sousa, C. L |
| author2Str |
Freitas-Silva, O Castro, I. M Teixeira, A SIlva, Silvia Helena Marques da Moraes, A. C. S. Sales Abreu, L. F Sousa, C. L |
| title |
Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts |
| title_short |
Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts |
| title_full |
Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts |
| title_fullStr |
Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts |
| title_full_unstemmed |
Efficacy of sodium hypochlorite and peracetic acid against Aspergillus nomius in Brazil nuts |
| title_sort |
efficacy of sodium hypochlorite and peracetic acid against aspergillus nomius in brazil nuts |
| publisher |
Elsevier |
| publishDate |
2020 |
| url |
http://patua.iec.gov.br//handle/iec/4077 |
| _version_ |
1717584454552125440 |
| score |
11.755432 |