تصفح Biological & Environmental Sciences حسب المؤلف "Al-Thani, Roda"
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Application of low-fermenting yeast Lachancea thermotolerans for the control of toxigenic fungi Aspergillus parasiticus, Penicillium verrucosum and Fusarium graminearum and their mycotoxins
Zeidan, R.; Zeidan, Randa; Ul-Hassan, Zahoor; Al-Thani, Roda; Balmas, Virgilio; Jaoua, Samir... more authors ... less authors ( MDPI , 2018 , Article)© 2018 by the authors. Licensee MDPI, Basel, Switzerland. Mycotoxins are important contaminants of food and feed. In this study, low fermenting yeast (Lachancea thermotolerans) and its derivatives were applied against ... -
Application of scanning electron microscopy and MALDI-TOF MS in the exploration of the parasporal insecticidal crystals of Bacillus thuringiensis strains isolated from Qatar soil
Al-Thani, A.; Al-Thani, Aldana; Ashfaq, Mohammad Yousaf; Al-Thani, Roda; Hassan, Zahoor Ul; Jaoua, Samir... more authors ... less authors ( Elsevier Ltd , 2022 , Article)Bacillus thuringiensis (Bt) plays an important role in health and agriculture due to its insecticidal activities. In this study, six Bt strains isolated from Qatar soil were used to explore their crystals morphologies and ... -
Application of yeasts and yeast derivatives for the biological control of toxigenic fungi and their toxic metabolites
Zahoor, Ul Hassan; Al Thani, Roda; Atia, Fathy A.; Alsafran, Mohammed; Migheli, Quirico; Jaoua, Samir... more authors ... less authors ( Elsevier , 2021 , Article)Mycotoxins, the metabolites of toxigenic fungi are important contaminants of food and agriculture industry throughout the world. Among the different strategies to minimize the mycotoxins synthesis and decontamination of ... -
Bacillus thuringiensis strain QBT220 pBtoxis plasmid structural instability enhances δ-endotoxins synthesis and bioinsecticidal activity
Nair, K.; Nair, Kavita; Al-Thani, Roda; Jaoua, Samir ( Academic Press , 2021 , Article)Bacillus thuringiensis subsp. israelensis (Bti) spherical parasporal crystal contains several insecticidal proteins used as environmentally safe alternative to toxic chemical pesticides. The exploration of a Bti strain ... -
Characterization of tunisian Bacillus thuringiensis strains with abundance of kurstaki subspecies harbouring insecticidal activities against the lepidopteran insect ephestia kuehniella
Saadaoui, Imen; Al-Thani, Roda; Al-Saadi, Fatma; Hassan, Najeh Belguith-Ben; Abdelkefi-Mesrati, Lobna; Schultz, Patrick; Rouis, Souad; Jaoua, Samir... more authors ... less authors ( Springer US , 2010 , Article)The study of 257 crystal-producing Bacillus thuringiensis isolates from bioinsecticide free soil samples collected from different sites in Tunisia, was performed by PCR amplification, using six primer pairs specific for ... -
Community structure and activity of a highly dynamic and nutrient-limited hypersaline microbial mat in Um Alhool Sabkha, Qatar
Al-Thani, Roda; Al-Najjar, Mohammad A.A.; Al-Raei, Abdul Munem; Ferdelman, Tim; Thang, Nguyen M.; Al Shaikh, Ismail; Al-Ansi, Mehsin; de Beer, Dirk... more authors ... less authors ( Public Library of Science , 2014 , Article)The Um Alhool area in Qatar is a dynamic evaporative ecosystem that receives seawater from below as it is surrounded by sand dunes. We investigated the chemical composition, the microbial activity and biodiversity of the ... -
Diversity of Bacillus thuringiensis Strains From Qatar as Shown by Crystal Morphology, d-Endotoxins and Cry Gene Content
Nair, Kavita; Al-Thani, Dhabi; Al-Thani, Roda; Al-Yafei, Fatima; Ahmed, Talaat; Jaoua, Samir... more authors ... less authors ( Frontiers Media , 2018 , Article)Bacillus thuringiensis (Bt) based insecticidal formulations have been recognized as one of the most successful, environmentally safe and sustainable method of controlling insect pests. Research teams worldwide are in ... -
Fungal and aflatoxin contamination of marketed spices
Hammami, Walid; Fiori, Stefano; Al Thani, Roda; Kali, Najet Ali; Balmas, Virgilio; Migheli, Quirico; Jaoua, Samir... more authors ... less authors ( Elsevier Ltd , 2014 , Article)Fourteen spice samples were collected from local markets in Doha, Qatar, during 2012, and were surveyed for the presence of potentially harmful mycoflora and for contamination with aflatoxins B1, B2, G1, and G2 by ... -
Occurrence of Mycotoxins and Toxigenic Fungi in Cereals and Application of Yeast Volatiles for Their Biological Control
Alkuwari, A.; Alkuwari, Asma; Hassan, Zahoor Ul; Zeidan, Randa; Al-Thani, Roda; Jaoua, Samir... more authors ... less authors ( MDPI , 2022 , Article)Fungal infections in cereals lead to huge economic losses in the food and agriculture industries. This study was designed to investigate the occurrence of toxigenic fungi and their mycotoxins in marketed cereals and explore ... -
Patulin and patulin producing Penicillium spp. occurrence in apples and apple-based products including baby food
Hammami, Walid; Al Thani, Roda; Fiori, Stefano; Al-Meer, Saeed; Atia, Fathy Atia; Rabah, Duha; Migheli, Quirico; Jaoua, Samir... more authors ... less authors ( The Journal of Infection in Developing Countries , 2017 , Article)Introduction: Patulin has raised the international attention because of its health risk. In fact, it has mutagenic, neurotoxic, immunotoxic, genotoxic and gastrointestinal effects in animals. In the present work, patulin ... -
Prevalence of Toxigenic Fungi and Mycotoxins in Arabic Coffee: Protective Effect of Traditional Coffee Roasting, Brewing and Microbial Volatiles
Al-Attiya, Wadha Ahmed Khalifa; UI Hassan, Zahoor; Al-Thani, Roda; Jaoua, Samir ( Qatar University Press , 2021 , Poster)Like other agricultural crops, fungal infection and synthesis of mycotoxins in coffee leads to significant economic losses. This study is aimed at investigating the prevalence of toxigenic fungi, their metabolites, and the ...