Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts
Hazelnuts are an economically important nut which is consumed world-wide. It is prone to infection by Aspergillus flavus and contamination with aflatoxins. Taking Tukey’s hazelnuts as a research object, the objective of this study were to (a) quantify respiration rates and (b) dry matter losses (DML...
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| Format: | Article |
| Language: | English |
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Academy of National Food and Strategic Reserves Administration
2021-11-01
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| Series: | Liang you shipin ke-ji |
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| Online Access: | http://lyspkj.ijournal.cn/lyspkj/article/abstract/20210605?st=article_issue |
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| author | KALLIOPI Mylona ANGEL Medina NARESH Magan |
| author_facet | KALLIOPI Mylona ANGEL Medina NARESH Magan |
| author_sort | KALLIOPI Mylona |
| collection | DOAJ |
| description | Hazelnuts are an economically important nut which is consumed world-wide. It is prone to infection by Aspergillus flavus and contamination with aflatoxins. Taking Tukey’s hazelnuts as a research object, the objective of this study were to (a) quantify respiration rates and (b) dry matter losses (DMLs) and(c) aflatoxin B1 (AFB1) contamination of naturally stored shelled hazelnuts at different temperatures and water availabilities. Subsequently, shelled hazelnuts were inoculated with additional A. flavus inoculum prior to storage to examine effects on dry matter losses and on AFB1 contamination. Maximum respiration of hazelnuts and associated mycoflora was under wetter conditions of 0.90～0.95 water activity (aw =12.5%～18% moisture content). This resulted in between approx. 10% DML at 25 and 30 ℃ after 5 days storage. Inoculation and storage of shelled hazelnuts + A. flavus inoculum resulted in similar patterns of respiration with optimal levels at 25～30 ℃ and >0.90 aw. Indeed, AFB1 contamination was highest at the maximum water levels tested of 0.90 aw. Indeed the contamination level exceeded the legislative limits set by the EU for AFB1 contamination of these nuts. Correlation between DMLs and all the AFB1 data in both sets of studies showed that very small changes in DML due to poor drying or storage of ≥0.6% resulted in AFB1 contamination levels exceeding the EU legislative limits. Thus, efficient drying and safe monitored storage is necessary to minimise the risk of AFB1 contamination in this economically important commodity and to avoid exposure of consumers to such toxins. |
| first_indexed | 2024-03-13T08:08:35Z |
| format | Article |
| id | doaj.art-a4a0349eb5d24f9282356813023b2495 |
| institution | Directory Open Access Journal |
| issn | 1007-7561 |
| language | English |
| last_indexed | 2024-03-13T08:08:35Z |
| publishDate | 2021-11-01 |
| publisher | Academy of National Food and Strategic Reserves Administration |
| record_format | Article |
| series | Liang you shipin ke-ji |
| spelling | doaj.art-a4a0349eb5d24f9282356813023b24952023-06-01T01:15:51ZengAcademy of National Food and Strategic Reserves AdministrationLiang you shipin ke-ji1007-75612021-11-01296162810.16210/j.cnki.1007-7561.2021.06.002Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled HazelnutsKALLIOPI Mylona0ANGEL Medina1NARESH Magan2Applied Mycology Group, Environment and AgriFood Theme, Cranfield University,Cranfield, Beds. MK43 0AL, U.K.Applied Mycology Group, Environment and AgriFood Theme, Cranfield University,Cranfield, Beds. MK43 0AL, U.K.Applied Mycology Group, Environment and AgriFood Theme, Cranfield University,Cranfield, Beds. MK43 0AL, U.K.Hazelnuts are an economically important nut which is consumed world-wide. It is prone to infection by Aspergillus flavus and contamination with aflatoxins. Taking Tukey’s hazelnuts as a research object, the objective of this study were to (a) quantify respiration rates and (b) dry matter losses (DMLs) and(c) aflatoxin B1 (AFB1) contamination of naturally stored shelled hazelnuts at different temperatures and water availabilities. Subsequently, shelled hazelnuts were inoculated with additional A. flavus inoculum prior to storage to examine effects on dry matter losses and on AFB1 contamination. Maximum respiration of hazelnuts and associated mycoflora was under wetter conditions of 0.90～0.95 water activity (aw =12.5%～18% moisture content). This resulted in between approx. 10% DML at 25 and 30 ℃ after 5 days storage. Inoculation and storage of shelled hazelnuts + A. flavus inoculum resulted in similar patterns of respiration with optimal levels at 25～30 ℃ and >0.90 aw. Indeed, AFB1 contamination was highest at the maximum water levels tested of 0.90 aw. Indeed the contamination level exceeded the legislative limits set by the EU for AFB1 contamination of these nuts. Correlation between DMLs and all the AFB1 data in both sets of studies showed that very small changes in DML due to poor drying or storage of ≥0.6% resulted in AFB1 contamination levels exceeding the EU legislative limits. Thus, efficient drying and safe monitored storage is necessary to minimise the risk of AFB1 contamination in this economically important commodity and to avoid exposure of consumers to such toxins.http://lyspkj.ijournal.cn/lyspkj/article/abstract/20210605?st=article_issueturkey’s hazelnutsstoragerespirationdry matter lossesaflatoxin b1aspergillus flavuslegislative limits |
| spellingShingle | KALLIOPI Mylona ANGEL Medina NARESH Magan Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts Liang you shipin ke-ji turkey’s hazelnuts storage respiration dry matter losses aflatoxin b1 aspergillus flavus legislative limits |
| title | Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts |
| title_full | Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts |
| title_fullStr | Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts |
| title_full_unstemmed | Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts |
| title_short | Effect of Interacting Abiotic Storage Conditions on Respiration, Dry Matter Losses and Aflatoxin B1 Contamination of Stored Turkey’s Shelled Hazelnuts |
| title_sort | effect of interacting abiotic storage conditions on respiration dry matter losses and aflatoxin b1 contamination of stored turkey s shelled hazelnuts |
| topic | turkey’s hazelnuts storage respiration dry matter losses aflatoxin b1 aspergillus flavus legislative limits |
| url | http://lyspkj.ijournal.cn/lyspkj/article/abstract/20210605?st=article_issue |
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