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    ABSTRACT: To overcome the difficulties of obtaining the Certified Reference Material (CRM) and according to the key documents of the European Union Reference Laboratory (EU-RL), a new standard reference molecule containing the construct specific of the canola event Oxy-235 (3'-junction Nitrilase/Tnos) and the canola endogenous reference gene (acety-CoA-carboxylase) was constructed and used for duplex real-time quantitative analysis. The limits of detection (LOD) were less than 5 Haploid Genome Copy (HGC) and the limits of quantification (LOQ) were about 10 HGC. Furthermore, mixed GM and non-GM canola samples were analysed with duplex QRT-PCR to evaluate the performance criteria as required for validation procedures in the EU-RL, namely, the precision and the accuracy. The accuracy expressed as bias ranged from 2% to 10% and the precision (repeatability and reproducibility) expressed as the RSDr and RSDR was from 2.2 to 5.12 and 2.15 to 5.46 respectively. All these indicated that the developed construct specific method and the reference molecule are suitable for the identification and the quantification of the canola event Oxy-235.
    No preview · Article · Feb 2014 · Food Chemistry
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    ABSTRACT: This study was carried out to determine the effect of dietary fibre (DF) of barley Rihane (BR) in the attenuation of colon, liver and lung histopathology alterations induced by azoxymethane (AOM) in rats. Rats were fed a control (C) or experimental diet containing 30% of BR. The intended rats for cancer treatment received two successive subcutaneous injections of azoxymethane (AOM) at 20mg/kg body weight. The colons were analyzed for crypt multiplicity after 12weeks of treatment. A histological study of the colon, liver and lungs was determined. The results showed that the BR diet significantly reduced the number of aberrant crypt per focus and altered their distribution. In addition, DF of BR increased significantly the mucus secretion compared to control group. The use of the AOM as colon specific carcinogen substance altered the liver and lung architectures, whereas the presence of DF of BR could be a protective factor for these organs.
    Full-text · Article · Nov 2013 · Food Chemistry
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    ABSTRACT: Four varieties (Rihane, Manel, Roho, and Tej) of Tunisian barley were analysed for their antioxidant activities (AA) using ABTS and DPPH radicals cation, and ferric reducing/antioxidant power (FRAP) methods. The total phenolic (TPC), total flavonoid (TFC) and condensed tannins (CTC) contents were measured. The results indicated that the total phenolic contents ranged from 195.02±0.32 to 220.11±0.32mg gallic acid equivalent/100g fresh weight. Results showed that Rihane has the highest TPC, TFC and CTC compared to other varieties. Roho barley had a lower activity than Tej barley. A significant correlation (p<0.05) was found between TPC, TFC, CTC and AA. This study suggests that Tunisian barley varieties may serve as a good source of natural antioxidants.
    Full-text · Article · Oct 2013 · Food Chemistry


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    Monastir, Tunisia
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Industrial Crops and Products 07/2012; 43(1):73-77. DOI:10.1016/j.indcrop.2012.07.008
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