نتایج جستجو برای: ochratoxins

تعداد نتایج: 779  

2002
A. Pfohl-Leszkowicz H. Bartsch U. Mohr J. Estève M. Castegnaro

Ecole Nationale Supérieure Agronomique, Laboratoire de Toxicologie et Sécurité Alimentaire, 1 Avenue de l’Agrobiopôle, 31326 Auzeville-Tolosane, France German Cancer Research Centre, Division of Toxicology and Cancer Risk Factors, Im Neuenheimer Feld 280, 69120, Heidelberg Germany Institute for Experimental Pathology, 30625 Hannover Germany International Agency for Research on Cancer, 150 Cours...

Journal: :Food additives and contaminants 2005
Daniel R Dietrich Alexandra H Heussner Evelyn O'Brien

The causal factors for the species- and sex-differences associated with ochratoxin-mediated toxicity remain unclear. Variations in kinetic parameters may play a major role in explaining these differences, however, discrepancies and inaccuracies in the toxicokinetics reported in the literature for various species, make comparison and hence the extrapolation to the human situation impossible. The...

2010

Mycotoxins are toxic secondary metabolites of fungi that contaminate a large variety of foods and have toxic effects on humans. The best protection against mycotoxins is to monitor their presence in food. This paper shows the screening results of mycotoxins present in 76 samples of different groups of grain foods. Samples of grain food were analyzed for contamination with aflatoxins, ochratoxin...

2012
Patrick B. Njobeh Mike F. Dutton Annica Tevell Åberg Per Haggblom

A total of 92 commercial compound feeds from South Africa were investigated for various mycotoxins. The data reveal the highest incidence of feed contamination for fumonisins (FB) (range: 104-2999 µg/kg) followed by deoxynivalenol (DON) (range: 124-2352 µg/kg) and zearalenone (ZEA) (range: 30-610 µg/kg). The incidence of ochratoxin A (OTA) and aflatoxins (AF)-contaminated samples were generally...

Journal: :The Journal of organic chemistry 2008
Marta Costa Filipe Areias Luís Abrunhosa Armando Venâncio Fernanda Proença

The reaction of salicylic aldehydes with malononitrile was reinvestigated, and the reaction pathway was followed by 1H NMR spectroscopy. A delicate control of the experimental conditions allowed the synthesis of 2-imino-2H-chromene-3-carbonitriles 1, (2-amino-3-cyano-4H-chromen-4-yl)malononitriles 2, 4-amino-5-imino-2,7-dimethoxy-5H-chromeno[3,4-c]pyridine-1-carbonitrile 12, and (4,5-diamino-1-...

2015
Melody Kawamoto Elena Page

In February 2014, CDC's National Institute for Occupational Safety and Health received a request for a health hazard evaluation from a union representative in an office building. A female employee reported the onset of symptoms involving multiple organ systems upon returning to work after a prolonged absence. The employee searched the Internet for descriptions of symptoms matching hers, found a...

Journal: :Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment 2008
R Lopez-Garcia C Augusto Mallmann M Pineiro

Coffee is an important export product of Ecuador. Producers are challenged by the implementation of regulatory limits for ochratoxin A. Ecuador has four coffee production areas and the potential for mycotoxin contamination varies due to different environmental conditions and cultural differences in harvesting, storage, processing and commercialization. The major contributors to contamination ar...

2005

Mould and mycotoxin contamination in food OTA toxicity Ochratoxin A producers Occurrence of Ochratoxin A Effect of water activity on OTA production OTA destruction during roasting of coffee Levels and distribution of OTA in green coffee (contamination, survey) Effect of processing and handling on OTA content of green coffee Effect of caffeine on OTA production Socioeconomic impact of coffee pro...

Journal: :Letters in applied microbiology 2001
L Abrunhosa R R Paterson Z Kozakiewicz N Lima A Venâncio

AIMS In order to assess the potential for producing mycotoxins, fungi were isolated from wine producing grapes. METHODS AND RESULTS The isolates were identified and Penicillium expansum, the most well recognized mycotoxin producer, was analysed for mycotoxin production by TLC. Many of the strains produced patulin and/or citrinin, often depending on whether they were grown on a grape or yeast ...

Journal: :Acta pharmaceutica 2005
Ana-Marija Domijan Maja Peraica Bogdan Cvjetković Suncana Turcin Zeljko Jurjević Dario Ivić

Maize grain samples (n=15) collected during the autumn of 2002 were analyzed for the presence of moulds and mycotoxins fumonisin B1 (FB1), fumonisin B2 (FB2), zearalenone (ZEA), and ochratoxin A (OTA). Mycological analysis showed that all samples were contaminated with Fusarium spp. and Penicillium spp., while Aspergillus spp. were found in 5 samples. F. proliferatum and F. verticilloides, the ...

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