Showing results 361 to 380 of 380
 Recherches en production laitière et valorisation du laitBlecker, Christophe  ; Burny, Philippe ; et alin Annales de Gembloux (1997), 102 Detailed reference viewed: 24 (19 ULg)Etude de la balance à film de Langmuir des propriétés de surface de la membrane du globule gras du lait.Blecker, Christophe ; ; et alPoster (1997) Detailed reference viewed: 20 (3 ULg)Etude de la modification des propriétés fonctionnelles du lactosérum par hydrolyse enzymatique de sa matière grasse résiduelleBlecker, Christophe ; Paquot, Michel ; Poster (1997) Detailed reference viewed: 9 (2 ULg)Les poudres de laitBlecker, Christophe Conference (1996, November 28) Detailed reference viewed: 3 (0 ULg)La techno-fonctionalité des protéines du laitPaquot, Michel ; Blecker, Christophe Scientific conference (1996, October 10) Detailed reference viewed: 23 (2 ULg)Improvement of foaming properties of whey protein products by enzymatic hydrolysis of the associated fat fractionBlecker, Christophe ; ; et alConference (1996, March) Detailed reference viewed: 10 (1 ULg)Recherches en production laitière et valorisation du lait.Blecker, Christophe ; Burny, Philippe ; et alin Annales de Gembloux (1996), 102(3-4), 131-181 Detailed reference viewed: 89 (35 ULg) Electrical microenvironment influence on the hydrolytic activity of free and immobilised Yarrowia lipolytica lipasePaquot, Michel ; Deleu, Magali ; et alin Biotechnology Letters (1996), 18(1), 73-78 The role of electrical properties of interfaces upon the activity of free and immobilised Yarrowia lipolytica lipase has been investigated. Sodium taurocholate and Sedipur 400, an anionic polyacrylamide ... [more ▼] The role of electrical properties of interfaces upon the activity of free and immobilised Yarrowia lipolytica lipase has been investigated. Sodium taurocholate and Sedipur 400, an anionic polyacrylamide, enhance the negative character of the fatty droplets of substrate and tend to improve the lipolytic activity while the cationic polyacrylamide (Sedipur 900) has opposite effects. Ca+ which reduces the fatty droplets charge as Sedipur 900, is however a good activator of the enzyme. The role of electrical properties on the optimum pH of the immobilised enzyme is clearer. Immobilisation of the lipase on a positively charged support shifts its optimum pH to acidic pH by repulsion towards H+ ions around the support. [less ▲] Detailed reference viewed: 19 (5 ULg)Model emulsion systemsBlecker, Christophe ; Paquot, Michel Conference (1995, April) Detailed reference viewed: 46 (30 ULg)Wheat gluten film in relation with breadmaking properties; Blecker, Christophe ; Razafindralambo, Hary et alPoster (1995, April) Detailed reference viewed: 13 (7 ULg)Purification of soybean lipoxygenase isoenzyme-1Fauconnier, Marie-Laure ; ; Blecker, Christophe et alPoster (1995, February 20) Detailed reference viewed: 10 (5 ULg)Two forms of lipase from Mucor miehei exhibit a different behavior at the air-water interface.Blecker, Christophe ; Razafindralambo, Hary ; Paquot, Michel et alin Colloids and Surfaces B : Biointerfaces (1995), (3), 271-279 Detailed reference viewed: 14 (7 ULg)Application Of The Quasi-Static Mode Of The Drop Volume Technique To The Determination Of Fundamental Surfactant PropertiesRazafindralambo, Hary ; Blecker, Christophe ; et alin Journal of Colloid and Interface Science (1995), 174(2), 373-377 The quasi-static mode of the drop volume technique has been applied for determining the equilibrium surface tension-concentration (σe-c) curves of ionic (SDS, CTAB) zwitterionic (CHAPS), and nonionic ... [more ▼] The quasi-static mode of the drop volume technique has been applied for determining the equilibrium surface tension-concentration (σe-c) curves of ionic (SDS, CTAB) zwitterionic (CHAPS), and nonionic (Triton X-100) surfactants. The experimental values have been fitted in two parts by the best polynomial and straight-line equations. Determination coefficients (R2) higher than 0.98 were achieved for all σe-c curves. The critical micelle concentration (CMC) and surface tension at the CMC have been calculated at the intersection point of the two fitted curves. The results conform with those found in the literature. The polynomial equation derivative at the CMC was used in the Gibbs equation to calculate the maximum surface excess concentration and the corresponding molecular area. The space required per molecule under saturation conditions is in agreement with the surfactant structures. A comparison with the Wilhelmy-plate method was also made. It is concluded that the quasi-static drop volume method provides accurate results and presents many practical advantages. [less ▲] Detailed reference viewed: 54 (44 ULg)Modification of the interfacial properties of whey by enzymatic hydrolysis of the residual fat.Blecker, Christophe ; ; Paquot, Michel et alin Lorient, D.; Dickinson, E. (Eds.) Food Macromolecules and Colloids. (1995) Detailed reference viewed: 8 (7 ULg)Modification of the interfacial properties of whey by enzymatic hydrolysis of the residual fatBlecker, Christophe ; ; Paquot, Michel et alPoster (1994, March) Detailed reference viewed: 1 (0 ULg)OPTIMIZATION OF LIPASE-CATALYZED SYNTHESIS OF CITRONELLYL ACETATE IN SOLVENT-FREE MEDIUMFonteyn, Fabienne ; Blecker, Christophe ; Lognay, Georges et alin Biotechnology Letters (1994), 16(7), 693-696 Citronellol esterification catalyzed by Candida antarctica lipase is performed with high yields (74%) in a solvent-free medium. The use of dessicants gives a 10% yield enhancement and substrate excess ... [more ▼] Citronellol esterification catalyzed by Candida antarctica lipase is performed with high yields (74%) in a solvent-free medium. The use of dessicants gives a 10% yield enhancement and substrate excess consumption by adding calculated amounts of acetic acid lead to a 80% pure citronellyl acetate. Quantities up to 100 ml are treated with success. [less ▲] Detailed reference viewed: 11 (7 ULg)Improvement Of Enzymatic-Synthesis Yields Of Flavor Acetates - The Example Of The Isoamyl AcetateRazafindralambo, Hary ; Blecker, Christophe ; Lognay, Georges et alin Biotechnology Letters (1994), 16(3), 247-250 Isoamyl acetate synthesis was chosen as a model to improve flavour acetate yields by optimising the enzymatic reaction. Alcohol:acid molar ratio, temperature, water content and amount of enzyme effects ... [more ▼] Isoamyl acetate synthesis was chosen as a model to improve flavour acetate yields by optimising the enzymatic reaction. Alcohol:acid molar ratio, temperature, water content and amount of enzyme effects were analyzed. The optimum values were respectively 4, 45 degrees C, 0,1% (w/v) and 0,5 g. In these conditions, the synthesis yield reached 80% after 24 h of reaction and was found 15 times greater than those already reported in the literature. [less ▲] Detailed reference viewed: 74 (41 ULg)La catalyse enzymatique en milieu organique : potentialités d'utilisation des lipases.Blecker, Christophe in Bulletin des Recherches agronomiques de Gembloux (1993), 28(1), 51-85 Detailed reference viewed: 30 (6 ULg)Synthèse enzymatique de composés d'arômes alimentaires.Blecker, Christophe Master's dissertation (1992) Detailed reference viewed: 30 (2 ULg)Physiological and bio-functional properties of gum arabic: a notable interest for certain human diseases; Goffin, Dorothée ; Destain, Jacqueline et alin Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (n.d.) Detailed reference viewed: 28 (17 ULg) |
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