Browsing Biological & Environmental Sciences by Author "Ben Khedher, Saoussen"
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Application of statistical experimental design for optimisation of bioinsecticides production by sporeless Bacillus thuringiensis strain on cheap medium
Ben Khedher, Saoussen; Jaoua, Samir; Zouari, Nabil ( Sociedade Brasileira de Microbiologia - SBM , 2014 , Article)In order to overproduce bioinsecticides production by a sporeless Bacillus thuringiensis strain, an optimal composition of a cheap medium was defined using a response surface methodology. In a first step, a Plackett-Burman ... -
Bayesian network and response surface methodology for prediction and improvement of bacterial metabolite production
Bouchaala, Lobna; Ben Khedher, Saoussen; Mezghanni, Héla; Zouari, Nabil; Tounsi, Slim ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)The optimization of antifungal activity production by Bacillus amyloliquefaciens was carried out using Response Surface Methodology (RSM) in two steps. The first step involved the screening of cultural parameters affecting ... -
Correlation between delta-endotoxin and proteolytic activities produced by Bacillus thuringiensis var. kurstaki growing in an economic production medium
Ennouri, Karim; Ben Khedher, Saoussen; Jaoua, Samir; Zouari, Nabil ( Taylor & Francis , 2013 , Article)Bacillus thuringiensis is a Gram positive bacterium that produces an insecticidal crystalline protein making it one of the most important biocontrol agents for pest management. Bioinsecticides based on B. thuringiensis ... -
Improvement of Bacillus thuringiensis bioinsecticide production by sporeless and sporulating strains using response surface methodology
Ben Khedher, Saoussen; Kamoun, Amel; Jaoua, Samir; Zouari, Nabil ( Elsevier B.V. , 2011 , Article)Statistical experimental designs, involving a Plackett-Burman design followed by a rotatable central composite design were used to optimize the culture medium constituents for Bacillus thuringiensis bioinsecticide production. ... -
Improvement of Bioinsecticides Production by Sporeless Bacillus thuringiensis strains in Response to Various Stresses in Low Cost Medium
Ben Khedher, Saoussen; Jaoua, Samir; Zouari, Nabil ( Springer-Verlag , 2011 , Article)The use of bioinsecticides, particularly those produced by sporeless Bacillus thuringiensis strains, has been shown to be a good alternative in pest management. Two types of sporeless mutants were distinguished. The ... -
Overproduction of Delta-Endotoxins by Sporeless Bacillusthuringiensis Mutants Obtained by Nitrous Acid Mutagenesis
Ben Khedher, Saoussen; Zouari, Nabil; Messaddeq, Nadia; Schultz, Patrick; Jaoua, Samir ( Springer-Verlag , 2011 , Article)Asporogenic and oligosporogenic Bacillus thuringiensis mutants having the ability to overproduce insecticidal crystal protein were generated by using nitrous acid (50 mg/ml), as chemical mutagenic agent. Insecticidal crystal ...