Browsing by Author "Jaoua S."
Now showing items 1-17 of 17
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A proteomic investigation of Aspergillus carbonarius exposed to yeast volatilome or to its major component 2-phenylethanol reveals major shifts in fungal metabolism
Tilocca B.; Balmas V.; Hassan Z.U.; Jaoua S.; Migheli Q. ( Elsevier B.V. , 2019 , Article)The use of yeast-derived volatile organic compounds (VOCs) represents a promising strategy for the biological control of various plant pathogens, including mycotoxin-producing fungi. Previous studies demonstrated the ... -
Characterization of the extracellular polymeric substances (EPS) of Virgibacillus strains capable of mediating the formation of high Mg-calcite and protodolomite
Al Disi Z.A.; Zouari N.; Dittrich M.; Jaoua S.; Al-Kuwari H.A.S.; Bontognali T.R.R.... more authors ... less authors ( Elsevier B.V. , 2019 , Article)The origin of dolomite –a common mineral in the geological record– is the subject of an ongoing debate. Among different hypotheses, it has been proposed that extracellular polymeric substances (EPS) excreted by microbes ... -
Co-occurrence of mycotoxins in commercial formula milk and cereal-based baby food on the Qatar market
Ul Hassan, Zahoor; Al Thani, Roda; A. Atia, Fathy; Al Meer, Saeed; Migheli, Quirico; Jaoua, Samir... more authors ... less authors ( Taylor and Francis Ltd. , 2018 , Article)The present study was conducted to explore the occurrence of mycotoxins in commercial baby foods in Doha-Qatar. LCMS/MS- and HPLC-based analysis of baby food (n?=?67) for 12 mycotoxins confirmed the presence of aflatoxin ... -
Combinatorial effect of Bacillus thuringiensis kurstaki and Photorhabdus luminescens against Spodoptera littoralis (Lepidoptera: Noctuidae).
Benfarhat-Touzri, D.; Ben Amira, A.; Ben khedher, S.; Givaudan, A.; Jaoua, S.; Tounsi, S.... more authors ... less authors ( WILEY-VCH , 2014 , Article)Spodoptera littoralis, one of the major pests of many important crop plants, is more susceptible to Bacillus thuringiensis aizawai delta-endotoxins than to those of Bacillus thuringiensis kurstaki. Within the framework of ... -
Detection of toxigenic mycobiota and mycotoxins in cereal feed market
Hassan Z.U.; Al-Thani R.F.; Migheli Q.; Jaoua S. ( Elsevier Ltd , 2018 , Article)The present study was designed to investigate the occurrence of mycotoxins and toxigenic mycobiota in cereals used as animal feed in a Qatari market. Aflatoxins (AFs) and ochratoxin A (OTA) were detected in 94 and 44% of ... -
Effect of yeast volatile organic compounds on ochratoxin A-producing Aspergillus carbonarius and A. ochraceus
Farbo M.G.; Urgeghe P.P.; Fiori S.; Marcello A.; Oggiano S.; Balmas V.; Hassan Z.U.; Jaoua S.; Migheli Q.... more authors ... less authors ( Elsevier B.V. , 2018 , Article)Many foods and beverages in temperate and tropical regions are prone to contamination by ochratoxin A (OTA), one of the most harmful mycotoxins for human and animal health. Aspergillus ochraceus and Aspergillus carbonarius ... -
Evidence of low levels of aflatoxin M1 in milk and dairy products marketed in Qatar
Hassan Z.U.; Al-Thani R.; Atia F.A.; Almeer S.; Balmas V.; Migheli Q.; Jaoua S.... more authors ... less authors ( Elsevier Ltd , 2018 , Article)This study was designed to explore the incidence of aflatoxin M1 (AFM1) in milk and dairy products marketed in Qatar. Milk (n = 72), yogurt (n = 21), cheese (n = 46), butter (n = 18) and laban (n = 25) samples were initially ... -
In-vitro application of a qatari burkholderia cepacia strain (QBC03) in the biocontrol of mycotoxigenic fungi and in the reduction of ochratoxin a biosynthesis by aspergillus carbonarius
Zeidan R.; Ul-Hassan Z.; Al-Thani R.; Migheli Q.; Jaoua S. ( MDPI AG , 2019 , Article)Mycotoxins are secondary metabolites produced by certain filamentous fungi, causing human and animal health issues upon the ingestion of contaminated food and feed. Among the safest approaches to the control of mycotoxigenic ... -
Investigation and Application of Bacillus licheniformis Volatile Compounds for the Biological Control of Toxigenic Aspergillus and Penicillium spp
Ul Hassan Z.; Al Thani R.; Alnaimi H.; Migheli Q.; Jaoua S. ( American Chemical Society , 2019 , Article)The present study was designed to investigate the antagonistic activity of Bacillus licheniformis BL350-2 against mycotoxigenic strains of Aspergillus and Penicillium. In vitro coincubation for 5 days indicated Aspergillus ... -
Investigation of the steps involved in the difference of susceptibility of Ephestia kuehniella and Spodoptera littoralis to the Bacillus thuringiensis Vip3Aa16 toxin
Abdelkefi-Mesrati, L.; Boukedi, H.; Chakroun, M.; Kamoun, F.; Azzouz, H.; Tounsi, S.; Rouis, S.; Jaoua, S.... more authors ... less authors ( Elsevier , 2011 , Article)BUPM95 is a Bacillus thuringiensis subsp. kurstaki strain producing the Vip3Aa16 toxin with an interesting insecticidal activity against the Lepidopteran larvae Ephestia kuehniella. Study of different steps in the mode of ... -
Potential for native hydrocarbon-degrading bacteria to remediate highly weathered oil-polluted soils in Qatar through self-purification and bioaugmentation in biopiles
AlKaabi N.; Al-Ghouti M.A.; Jaoua S.; Zouari N. ( Elsevier B.V. , 2020 , Article)Petroleum-derived contamination events constitute a unique environmental issue in the arid areas because of the weathering processes, accentuated due to harsh conditions and representing the main origin of failure of ... -
Prevalence of Fusarium fungi and their toxins in marketed feed
Hassan Z.U.; Al Thani R.; Balmas V.; Migheli Q.; Jaoua S. ( Elsevier Ltd , 2019 , Article)This study aimed to explore the incidence of Fusarium fungi and their mycotoxins in marketed feed in Qatar. Samples of mixed-grain-cereal, maize, wheat, millet, barley, oat and soybean were tested for the presence of ... -
Production of Polyclonal and Monoclonal Antibodies Against the Bacillus thuringiensis Vegetative Insecticidal Protein Vip3Aa16
Ben Hamadou-Charfi, D.; Sauer, A.; Abdelkafi-Mesrati, L.; Jaoua, S.; Dietrich, S. ( Springer International Publishing AG , 2014 , Article)The aim of this study is to establish a quantitative determination of the vegetative insecticidal protein Vip3A from the culture supernatant of Bacillus thuringiensis either by ELISA or by the conventional quantification ... -
Purification and characterization of a new Bacillus thuringiensis bacteriocin active against Listeria monocytogenes, Bacillus cereus and Agrobacterium tumefaciens
Kamoun, F.; Fguira, IB.; Hassen, NB.; Mejdoub, H.; Lereclus, D.; Jaoua, S.... more authors ... less authors ( Springer Science , 2011 , Article)This study reports on the identification, characterization and purification of a new bacteriocin, named Bacthuricin F103, from a Bacillus thuringiensis strain BUPM103. Bacthuricin F103 production began in the early exponential ... -
The combinatory effect of Cyt1Aa flexibility and specificity against dipteran larvae improves the toxicity of Bacillus thuringensis kurstaki toxins
Zribi Zghal R.; Frikha F.; Elleuch J.; Darriet F.; Chandre F.; Jaoua S.; Tounsi S.... more authors ... less authors ( Elsevier B.V. , 2019 , Article)Cyt1A98 is a novel cytolytic protein, from BUPM98 Bacillus thuringiensis strain, characterized by its synergistic activity with B. thuringiensis kurstaki toxins against lepidopteran larvae. In this study, we evidenced that ... -
The replacement of five consecutive amino acids in the cyt1a protein of bacillus thuringiensis enhances its cytotoxic activity against lung epithelial cancer cells
Nair K.; Iskandarani A.; Al-Thani R.; Mohammad R.; Jaoua S. ( MDPI AG , 2018 , Article)Cyt1A protein is a cytolytic protein encoded by the cyt gene of Bacillus thuringiensis subsp. israelensis (Bti) as part of the parasporal crystal proteins produced during the sporulation. Cyt1A protein is unique compared ... -
Use of β-cyclodextrin as enhancer of ascorbic acid rejection in permselective films for amperometric biosensor applications
Monti P.; Rocchitta G.; Marceddu S.; Dettori M.A.; Fabbri D.; Jaoua S.; Migheli Q.; Delogu G.; Serra P.A.... more authors ... less authors ( Elsevier B.V. , 2018 , Article)Interference rejection in amperometric biosensors can be more effective introducing some modifiers during electro-deposition of permselective film. Addition of β-cyclodextrin (βCD), a cyclic oligosaccharide composed of ...