Institutional repository of university M'Hamed Bougara Boumerdes
Not a member yet
13163 research outputs found
Sort by
Model reduction of MIMO systems
No full text144 p. : ill. ; 30 cmOver the past few decades, considerable imprvements have been made in the approximation of high degree multivariable systems by low degree reduced models. The resulting reduced models are used to simplify the analysis and synthesis of complex systems as well as their modelling and implementation..
Etude des propriétés physico-mécaniques des fibres d'un hybride de coton algérien, variété "gossypium barbadense" : contribution à l'analyse de la maturité
No full text166 p. : ill. ; 30 c
An Agrofood waste physicochemical characterization for its valorization
No full textThis study was focused on biorefinery byproducts mainly, based on distilled fatty acids from sunflower oil and coconut oil; for their valorization. They were characterized oleochemically, for sunflower oil, the Iodine Index: 120 g I2 / 100g fat noted the unsaturation of its fatty acids and the Refractive Index (RI) n 20: 1417 revealed its siccativity. As for the coconut oil, the saponification index: 250 mg KOH / g fat was on the rise, insured its ability to promote saponification and the IR n20: 1. 448 attested its un-siccativity; polyunsaturated fatty acids of these both oils were revealed via gas chromatography. These tests results were promoted for the development of a liquid soap, that was characterized physicochemically via the residual base: 0.02%, total fat content: 25.52%, residual glycerol content: 14.68%, pH: 07.90, lyophilic hydrophilic balance: 20. 02, surface tension: 34.10 dynes / cm, concentration micelle critic: 05. 103 mol /l and spectral methods such FTIR, XRD and SEM corroborated these analyses; which were confirmed the presence of carboxylic fatty acid salts. This work was conclusive, resulted in a liquid soap loaded with 14.68% of vegetable glycerin with moisturizing, emollient and softening properties, in conformity with hygiene standard