Browsing by Author "Zouari, Nabil"
Now showing items 1-20 of 24
-
Antifungal activities of an endophytic Pseudomonas fluorescens strain Pf1TZ harbouring genes from pyoluteorin and phenazine clusters
( Springer Netherlands , 2010 , Article)Pseudomonas fluorescens Pf1TZ was inhibitory in vitro to a number of phytopathogenic fungi and could protect vine plantlets against Botrytis cinerea. Total protection was reached after 3 weeks of bacterial inoculation. The ... -
Application of statistical experimental design for optimisation of bioinsecticides production by sporeless Bacillus thuringiensis strain on cheap medium
( 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 ... -
Considering the Specific Impact of Harsh Conditions and Oil Weathering on Diversity, Adaptation, and Activity of Hydrocarbon-Degrading Bacteria in Strategies of Bioremediation of Harsh Oily-Polluted Soils
( Hindawi Publishing Corporation , 2017 , Article)Weathering processes change properties and composition of spilled oil, representing the main reason of failure of bioaugmentation strategies. Our purpose was to investigate the metabolic adaptation of hydrocarbon-degrading ... -
Correlation between delta-endotoxin and proteolytic activities produced by Bacillus thuringiensis var. kurstaki growing in an economic production medium
( 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 ... -
Correlation between synthesis variation of 2-alkylquinolones and the antifungal activity of aBurkholderia cepacia strain collection
( Springer Netherlands , 2012 , Article)Twenty epiphytic and rhizospheric bacterial strains harbouring strong antifungal activities were isolated from the Tunisian environment. This group of bacteria was identified as Burkholderia cepacia genomovar I using 16S ... -
Environmental Burkholderia cepacia strain CS5 acting by two analogous alkyl-quinolones and a didecyl-phthalate against a broad spectrum of phytopathogens fungi
( Springer-Verlag , 2011 , Article)An environmental Burkholderia cepacia strain named Cs5 was isolated and identified first using API biochemical identification system and then with 16S rDNA and recA sequence homology search. This bacterium exhibited a broad ... -
Evidence of a Role for Aerobic Bacteria in High Magnesium Carbonate Formation in the Evaporitic Environment of Dohat Faishakh Sabkha in Qatar
( Frontiers Media , 2017 , Article)Dolomite (MgCa(CO3)2) is an important petroleum reservoir rock mineral common in ancient sedimentary rocks which is infrequently found in modern environments. The mechanism of dolomite formation remains poorly understood, ... -
Improvement of Bacillus thuringiensis bioinsecticide production by sporeless and sporulating strains using response surface methodology
( 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
( 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 ... -
Improvement of Photorhabdus temperata bioinsecticides production in low-cost media through adequate fermentation technology
( Wiley Subscription Services, Inc. , 2012 , Article)To develop a cost effective process for bioinsecticides production by Photorhabdus temperata, dissolved oxygen (DO) requirements were investigated in both the complex and the optimized media using diluted seawater as a ... -
Improvement of Photorhabdus temperata strain K122 bioinsecticide production by batch and fed-batch fermentations optimization
( Springer-Verlag , 2012 , Article)Optimization of a fermentation process for bioinsecticides production by Photorhabdus temperata strain K122 was investigated into fully controlled 3-L fermenter using an optimized medium (OM). Development of large-scale ... -
Integration of a Recombinant Chitinase into Bacillus thuringiensis Parasporal Insecticidal Crystal
( Springer-Verlag , 2011 , Article)Chitinases have been successfully used in combination with Bacillus thuringiensis delta-endotoxins forming crystals in order to enhance their insecticidal activities. In this context, we opted for promoting the chitinase ... -
INVESTIGATION OF BACTERIAL DIVERSITY AND CHEMOMETRIC ASSESSMENT FOR ENHANCING BIOREMEDIATION OF HYDROCARBONS IN QATARI SOILS
(2018 , Dissertation)Qatar is one of the leading countries in oil and gas industry worldwide. Qatar is located in the middle of the Arabian Gulf sea, a semi-closed sea surrounded by many petrochemical sites, besides the active offshore traffic ... -
INVESTIGATION OF THE NUTRITIONAL REQUIREMENTS AND CORRESPONDING CODING GENES OF HYDROCARBON-DEGRADING BACTERIAL STRAINS FOR THE PRODUCTION OF BIOMASS USEFUL IN BIOREMEDIATION OF PETROLEUM POLLUTION
(2015 , Master Thesis)Petroleum-derived contamination events constitute one of the most dominant sources of environmental deterioration in the industrialized countries. Hydrocarbon compounds are recognized as toxic and carcinogenic organic ... -
Investigation of the Role of Carbonic Anhydrase in Mineral Formation and Magnesium Incorporation by Bacteria from Qatari Sabkhas and Marine Sediments
(2020 , Master Thesis)Mineral-forming bacteria are of great interest in arid environments specifically. These environments are favorable for enhancing the microbial carbonate deposition that is thought to largely influence the sedimentary ... -
Involvement of oxidative stress and growth at high cell density in the viable but nonculturable state of Photorhabdus temperata ssp. temperata strain K122
( Elsevier Ltd , 2010 , Article)Photorhabdus temperata ssp. temperata strain K122 represents a promising source of bioinsecticide. When cultured in an optimized medium, P. temperata exhibited restricted survival in terms of colony-forming ability on solid ... -
Isolation and Screening of Hydrocarbon Degrading Bacterial Strains for Bioremediation of Petroleum Pollution in Qatar
(2013 , Master Thesis)Pollution, due to activities related to the oil industry, represents a serious threat to the natural environment. The application of biotechnological methods provides much safer and sustainable alternatives for bioremediation ... -
ISOLATION, IDENTIFICATION, DIFFERENTIATION AND SCREENING OF LOCAL AEROBIC UREOLYTIC BACTERIA INVOLVED IN MICROBIALLY INDUCED CALCIUM CARBONATE PRECIPITATION IN QATARI SOIL.
(2018 , Master Thesis)Biomineralization plays an important role in stabilizing the soil by modifying its geological and physical properties, hence, acting as a stabilizer against wind erosion specially in regions characterized by harsh soil ... -
A MALDI-TOF study of bio-remediation in highly weathered oil contaminated soils
( Elsevier , 2018 , Article)We have shown that Bacillus cereus is dominating the bacterial population at three polluted oil-industry sites where weather and soil conditions are extreme in terms of temperature, UV-radiation and salinity. A minor ... -
Overcome of carbon catabolite repression of bioinsecticides production by sporeless Bacillus thuringiensis through adequate fermentation technology
( Hindawi Publishing Corporation , 2014 , Article)The overcoming of catabolite repression, in bioinsecticides production by sporeless Bacillus thuringiensisstrain S22 was investigated into fully controlled 3 L fermenter, using glucose based medium. When applying adequate ...
