Browsing by Author "Haderbache, L."

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    Quality Of imported honeys marketed in Algeria
    (University of El Oued, Faculty of Science and Technology, PO BOX 789 El Oued 39000, Algeria, 2015) Haderbache, L.; Mohammedi, A.
    Honey is mostly used for therapeutic purposes, that’s why its quality must be closely monitored. This study focuses on the controle of 40 imported honeys coming from 13 countries (2004 – 2011). We revealed that they do not always have the required quality to be consumed as such. In addition to the labeling and organoleptic problems, often they contains too much moisture (≥18%); 70 % of these samples had an average HMF of 78 mg/kg and a pH less than 3.5, indicating an advanced aging and inapropriate thermal past. Pollen analysis and electrical conductivity was used to confirm presumed origins, and proline rate reveals some inverted sugar fraud. We aim by this work to catch consumers and local authorities attention in order to strengthen honey control. It is about everyone's health, and it concerns the prosperity of the national beekeeping which faces unfair competition
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    Valorization of tomato peel waste carotenoids in different oil matrices
    (Aljest, 2018) Zidani, S.; Benakmoum, A.; Haderbache, L.; Hidous, K.; Abbeddou, S.
    The aim of this study is to enrich different oil matrices with carotenoids and lycopene from tomato peel waste. The present study tested two hypotheses: 1) fatty acid chain length and degree of unsaturation affect diffusivity of lycopene and β-carotene in fat matrix; and 2) diffusivity of carotenoids in fat changes with the quantity of carotenoids extracted. To evaluate the effect of fatty acid profile on carotenoid diffusivity, dried tomato peel (DTP) was extracted in ten different mixtures of sunflower oil (SO), goat’s butter (GB) and palm stearin (PS).Proportions of each fat type in the mixture was calculated using a mathematical model. Three concentrations of DTP were tested, 2.22, 4.44 and 6.66%. Dry tomato peel used in this study was rich in carotenoids, lycopene especially (188.2 mg/100 mL). Our results confirm that fatty acid profile of the fat matrix affects diffusivity of carotenoids. We concluded that at lower concentrations of DTP, lycopene has higher diffusivity with short chain fatty acid, while with higher concentrations of DTP, diffusivity of lycopene is favored with longer chain fatty acids. Diffusivity of β-carotene is not associated directly with the fatty acid chain length. Its pattern might be due to other factors of competition and molecular structure. There was no evidence that the unsaturation degree of fatty acids affects carotenoid’s diffusivity in fat