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Effect of different storage conditions on the stability and safety of almonds

Rodrigues, Paula; Jelassi, Arij; Kanoun, Elifa; Sulyok, Michael; Correia, Paula; Ramalhosa, Elsa; Pereira, Ermelinda

Almond production in Portugal is of great importance for the economy of their main producing areas. However, the contamination of these nut fruits with fungi and mycotoxins poses a significant risk to food safety and security. This work intended to evaluate the influence of storage conditions on the microbial and mycotoxin stability and safety of almonds throughout long-term storage. Two almond varieties-Lauran...

Date: 2023   |   Origin: Biblioteca Digital do IPB

Mycotoxins and other secondary metabolites are produced by Gnomoniopsis smithog...

Álvarez Rubio, Micaela; Agostini, Isadora; Silva, Sofia; Dallemole-Giaretta, Rosangela; Sulyok, Michael; Sampaio, Ana; Rodrigues, Paula

Gnomoniopsis smithogilvyi (Gs) is a relevant pathogen of chestnut since it provokes significant losses worldwide. The aim of this study was to screen the effect of a new biocontrol agent (BCA) against Gs isolated from chestnut (CIMO-BCA1) on the mould’s growth as well as on the production of secondary metabolites. The chemical fungicide Horizon® (tebuconazole; HOR) and the commercial biofungicide Serenade® ASO ...

Date: 2023   |   Origin: Biblioteca Digital do IPB

Effect of different storage conditions on the stability and safety of almonds

Rodrigues, Paula; Jelassi, Arij; Kanoun, Elifa; Sulyok, Michael; Correia, Paula; Ramalhosa, Elsa; Pereira, Ermelinda

Almond production in Portugal is of great importance for the economy of their main producing areas. However, the contamination of these nut fruits with fungi and mycotoxins poses a significant risk to food safety and security. This work intended to evaluate the influence of storage conditions on the microbial andmycotoxin stability and safety of almonds throughout long-term storage. Two almond varieties—Laurann...

Date: 2023   |   Origin: Biblioteca Digital do IPB

Effect of different storage conditions on the stability and safety of almonds

Rodrigues, Paula; Jelassi, Arij; Kanoun, Elifa; Sulyok, Michael; Correia, Paula; Ramalhosa, Elsa; Pereira, Ermelinda Lopes


Effect of relative humidity on the quality and safety of peeled almond kernels ...

Fernandes, Luana; Graeff, Francieli; Jelassi, Arij; Sulyok, Michael; Garcia, Carolina; Rodrigues, Nuno; Pereira, J.A.; Bento, Albino; Kanoun, Alifa

Long-term transport and storage of peeled almonds under unsuitable conditions may cause the product’s rejection. To get knowledge in this topic, peeled almonds were stored at 25◦C and 60, 70, and 80% relative humidity (RH). The maintenance of high RH (80%) caused some visual defects after 4 months. Even though the 60, 70, and 80% RH did not clearly affect the production of primary and secondary products formed ...

Date: 2022   |   Origin: Biblioteca Digital do IPB

Effect of relative humidity on the quality and safety of peeled almond kernels ...

Fernandes, Luana; Graeff, Francieli; Jelassi, Arij; Sulyok, Michael; Garcia, Carolina; Rodrigues, Nuno; Pereira, J.A.; Bento, Albino; Kanoun, Alifa

Long-term transport and storage of peeled almonds under unsuitable conditions may cause the product's rejection. To get knowledge in this topic, peeled almonds were stored at 25 degrees C and 60, 70, and 80% relative humidity (RH). The maintenance of high RH (80%) caused some visual defects after 4 months. Even though the 60, 70, and 80% RH did not clearly affect the production of primary and secondary products...

Date: 2022   |   Origin: Biblioteca Digital do IPB

Enzymes and secondary metabolites profiles of Gnomoniopsis smithogilvyi are aff...

Sampaio, Ana; Camelo, Verónica; Fraga, Irene; Gomes, A.; Sulyok, Michael; Gomes-Laranjo, José; Dias, Albino A.; Rodrigues, Paula

Chestnut tree (Castanea sativa Mill) is a crop with high economic and social importance in Trás-os-Montes Region. The pre and post-harvest quality of its nuts can be affected by many factors, being the lasses dueto fungi very large. During the last decade a new endophyte fungus, Gnomoniopsis smithogilvyi, causing brown rot, has been isolated from both rotten and healthy fruits, and its growth seems to be relate...

Date: 2021   |   Origin: Biblioteca Digital do IPB

The effects of naturally occurring or purified deoxynivalenol (DON) on growth p...

Hooft, Jamie M.; Ferreira, Cristina; Lumsden, John S.; Sulyok, Michael; Krska, Rudolf; Bureau, Dominique P.

It has been previously established that rainbow trout are extremely sensitive to the ubiquitous Fusarium mycotoxin deoxynivalenol (DON)


Evaluation of the bioactive properties of a secondary metabolite produced by Pe...

Wierzbínska, Agata Karolina; Barros, Lillian; Sulyok, Michael; Ferreira, Isabel C.F.R.; Rodrigues, Paula

Fungi of the genus Penicillium are promising sources of bioactive substances. Fungal strains isolated from poorly characterized habitais are currently under active investigation as potential producers of biologically active compounds. Penicillium nordicum is mostly known by its ability to produce the mycotoxin ochratoxin A in several protein- and salt-rich food matrices like processed meat and cheese, but it ca...

Date: 2017   |   Origin: Biblioteca Digital do IPB

Simultaneous multi-mycotoxin determination in maize and poultry feeds from Braz...

Souza, Maria de Lourdes Mendes de; Sulyok, Michael; Freitas-Silva, O.; Costa, Sônia Soares; Brabet, Catherine; Machinski Junior, Miguel

A multi-mycotoxin method based on High Performance Liquid Chromatography coupled with tandem Mass Spectrometry detection (HPLC-MS /MS) was applied to investigate the occurrence of toxic fungal metabolites in samples collected from a poultry feed factory and integrated poultry farms, in Brazil. A total of 119 samples were analyzed including 38 maize grain samples collected from the factory reception, 36 maize gr...


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