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Browsing Cranfield Health by Author "Abdel-Hadi, Ahmed"

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Complex regulation of the aflatoxin biosynthesis gene cluster of Aspergillus flavus in relation to various combinations of water activity and temperature

Schmidt-Heydt, Markus; Abdel-Hadi, Ahmed; Magan, Naresh; Geisen, Rolf (Elsevier, 2009-11-15)

A microarray analysis was performed to study the effect of varying combinations of water activity and temperature on the activation of aflatoxin biosynthesis genes in Aspergillus flavus grown on YES medium. Generally A. ...
Control of Aflatoxin Production of Aspergillus flavus and Aspergillus parasiticus Using RNA Silencing Technology by Targeting aflD (nor-1) Gene.

Abdel-Hadi, Ahmed; Caley, D. P.; Carter, D. R.; Magan, Naresh (MDPI AG, 2011-06-30)

Aspergillus ﬂavus and Aspergillus parasiticus are important pathogens of cotton, corn, peanuts and other oil-seed crops, producing toxins both in the field and during storage. We have designed three siRNA sequences ...
Discrimination between aflatoxigenic and non-aflatoxigenic Aspergillus section Flavi strains from Egyptian peanuts using molecular and analytical techniques

Abdel-Hadi, Ahmed; Carter, David; Magan, Naresh (Wageningen Academic Publishers, 2011-02-01)

A wide range of Aspergillus section Flavi strains were isolated from Egyptian peanut samples. Eighteen of these strains were compared with two type strains (Aspergillus flavus SRRC G1907 and Aspergillus parasiticus 2747) ...
Influence of physiological factors on growth, sporulation and ochratoxin A/B production of the new Aspergillus ochraceus grouping

Abdel-Hadi, Ahmed; Magan, Naresh (Wageningen Academic Publishers, 2009-11)

Recently, new species within the Aspergillus section Circumdati group responsible for ochratoxin production were reported. This study has examined the impact of interactions between water activity (aw, 0.99-0.90), temperature ...
Molecular ecology of aspergillus section flavi species : approaches to understand the role of aflatoxin genes in aflatoxin biosynthesis

Abdel-Hadi, Ahmed (Cranfield University, 2011-02)

This is the first study to integrate and correlate the effect of ecophysiological factors on the life cycle of Aspergillus flavus by carrying out complementary work on gene expression of the aflatoxin gene cluster, with ...
The production of aflatoxin B1 or G1 by Aspergillus parasiticus at various combinations of temperature and water activity is related to the ratio of aflS to aflR expression

Schmidt-Heydt, Markus; Rüfer, C. E.; Abdel-Hadi, Ahmed; Magan, Naresh; Geisen, Rolf (Mycotoxin Research, 2010-11-01)

The influence of varying combinations of wateractivity (aw) and temperature on growth, aflatoxin biosynthesisand aflR/aflS expression of Aspergillus parasiticuswas analysed in the ranges 17-42°C and 0.90-0.99 aw.Optimum ...
A systems approach to model the relationship between aflatoxin gene cluster expression, environmental factors, growth and toxin production by Aspergillus flavus.

Abdel-Hadi, Ahmed; Schmidt-Heydt, Markus; Parra, Roberto; Geisen, Rolf; Magan, Naresh (2012-04-07)

A microarray analysis was used to examine the effect of combinations of water activity (a(w), 0.995-0.90) and temperature (20-42°C) on the activation of aflatoxin biosynthetic genes (30 genes) in Aspergillus flavus grown ...
Temporal monitoring of the nor-1 (aflD) gene of Aspergillus flavus in relation to aflatoxin B-1 production during storage of peanuts under different water activity levels

Abdel-Hadi, Ahmed; Carter, D; Magan, Naresh (Blackwell Publishing Ltd, 2010-12-01)

Aims: A relative quantification system (RQ-PCR) was used to monitor the correlations between the activity of the nor-1 (=aflD) gene of Aspergillus flavus using real-time PCR in relation to phenotypic aflatoxin B-1 ...

Browsing Cranfield Health by Author "Abdel-Hadi, Ahmed"

Browsing Cranfield Health by Author "Abdel-Hadi, Ahmed"

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