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السجلات المعروضة 11 -- 20 من 64
Evidencing the diversity and needs of adjustment of the nutritional requirements for hydrocarbon-degrading activity of: Pseudomonas aeruginosa adapted to harsh conditions using 2<sup>n</sup> full factorial design
(
Royal Society of Chemistry
, 2017 , Article)
To overcome the partial or complete failure of oil hydrocarbon bioremediation due to weathering processes, occurring in most oil producing and spilling areas, nutritional requirements of the most widely used bacterium, ...
Potential of Photorhabdus temperata K122 bioinsecticide in protecting wheat flour against Ephestia kuehniella
(
Elsevier Ltd
, 2013 , Article)
The present study reports investigations on the insecticidal activity of the entomopathogenic bacterium Photorhabdus temperata K122 against the Mediterranean flour moth Ephestia kuehniella. Cultured in the optimized medium, ...
Fungal and aflatoxin contamination of marketed spices
(
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 ...
Antioxidant constituents from Lawsonia inermis leaves: Isolation, structure elucidation and antioxidative capacity
(
Elsevier Ltd
, 2011 , Article)
The antioxidant potential of different fractions of Lawsonia inermis (Lythraceae) was investigated. The n-butanolic fraction showed the highest yield of extraction; it also exhibited a strong antioxidant activity in the ...
Isolation of entomopathogenic Bacillus from a biodynamic olive farm and their pathogenicity to lepidopteran and coleopteran insect pests
(
Elsevier Ltd
, 2012 , Article)
The occurrence of Bacillus entomopathogenic bacteria on a Tunisian biodynamic farm was determined by examining 75 samples from olive tree (Olea europaea L.) habitats. A total of 40 Bacillus isolates were characterized ...
Electropolymerized phenol derivatives as permselective polymers for biosensor applications
(
The Royal Society of Chemistry
, 2015 , Article)
Amperometric biosensors are often coated with a polymeric permselective film to avoid electroactive
interference by reducing agents present in the target medium. Phenylenediamine and phenol monomers are commonly used to ...
Chemical composition and evaluation of antioxidant and antimicrobial activities of Tunisian Thymelaea hirsuta with special reference to its mode of action
(
Elsevier B.V.
, 2013 , Article)
In the present study, we evaluated in vitro antimicrobial and antioxidant properties of Thymelaea hirsuta extracts as well as its phytochemical composition. Total phenolic and flavonoid contents were highest in acetone and ...
Co-occurrence of mycotoxins in commercial formula milk and cereal-based baby food on the Qatar market
(
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 ...
Selection and characterisation of an HD1-like Bacillus thuringiensis isolate with a high insecticidal activity against Spodoptera littoralis (Lepidoptera: Noctuidae)
(
John Wiley & Sons, Ltd
, 2014 , Article)
Spodoptera littoralis (Boisduval) larvae are known by their susceptibility to Bacillus thuringiensis subsp. aizawai strains. In order to prevent the appearance of B. thuringiensis (Bt) resistance and to develop economical ...
Comparative study of Bacillus thuringiensis Cry1Ia and Cry1Aa delta-endotoxins : activation process and toxicity against Prays oleae
(
Elsevier Inc.
, 2010 , Article)
Cry1Ia and Cry1Aa proteins exhibited toxicities against Prays oleae with LC(50) of 189 and 116 ng/cm(2), respectively. The ability to process Cry1Ia11 protoxin by trypsin, chymotrypsin and P. oleae larvae proteases was ...