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See detailPhysico-chemical characterization of new polyhydroxyburates (PHB).
Ottevaere, M; Lespineux, David; Sevrin, Chantal ULg et al

Poster (2009, April 01)

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See detailPhysico-chemical mechanisms affecting the adherence of starch granules on materials with different hydrophobicities
Detry, Jean; Sindic, Marianne ULg; Servais, Marjorie et al

in Journal of Colloid & Interface Science (2011), 355

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See detailPhysico-chemical properties and aroma profile of Acacia Honey produced in Romania
Madas, Mariana-Niculina ULg; Francis, Frédéric ULg; Marghitas, L.A. et al

in Communications in Agricultural and Applied Biological Sciences (2014, February 07), 79(1), 133-135

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See detailPhysico-chemical properties and CO2 fluxes at a frost flowers station (SIMBA Experiment - Bellingshaussen Sea, Antarctica)
Tison, Jean Louis; Brabant, Frederic; Geilfus, Nicolas-Xavier ULg et al

Poster (2009, March)

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See detailPhysico-chemical properties and photocatalytic activity of calcined P-doped and P/Ag-doped TiO2 xerogels
Bodson, Céline; Pirard, Sophie ULg; Pirard, René ULg et al

Conference (2013, March 05)

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See detailPhysico-chemical properties and photocatalytic activity of P/Ag-doped TiO2 xerogels
Bodson Céline; Pirard, Sophie ULg; Pirard René et al

Conference (2013, July)

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See detailLa physico-chimie des comètes
Swings, Polydore ULg

Book published by Université de Paris (1951)

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See detailPhysico-chimie et minéralogie des argiles de Bana (Ouest, Cameroun)
Mache, Jacques Richard ULg; Fagel, Nathalie ULg; SIGNING, Pierre

Poster (2012, May 15)

Dans le but de contribuer à la valorisation des géoressources, notamment les matériaux argileux du Cameroun, nous avons dans ce travail procédé à la caractérisation minéralogique et physico-chimique des ... [more ▼]

Dans le but de contribuer à la valorisation des géoressources, notamment les matériaux argileux du Cameroun, nous avons dans ce travail procédé à la caractérisation minéralogique et physico-chimique des argiles récoltées dans la région de Bana. Pour cela diverses méthodes et moyens d’identification ont été utilisés, notamment la diffraction des rayons X (DRX), l’analyse chimique, la spectroscopie infrarouge, la microscopie électronique à balayage, l’analyse thermique, l’analyse granulométrique, la détermination des capacités d’échange cationique et la détermination de la surface spécifique. Les résultats de cette étude ont montré que les argiles de Bana sont formées principalement de smectite, kaolinite et talc comme minéraux argileux. Les minéraux non argileux associés sont l’anatase, le quartz, le feldspath, la goethite et l’hématite. Les observations au microscope électronique à balayage sont conformes avec la nature smectique de ces matériaux (Figure 1). Les capacités d’échange cationique (comprises entre 40 et 57 méq/100g) et les surfaces spécifiques (comprises entre 50 et 68 m2) sont également dans les moyennes mesurées pour des argiles smectiques (Morgan et al.,1985; Van Olphen et Fripiat,1979). Le test de saturation au lithium (test de Green Kelly - Lim et Jackson, 1986) a permis d’établir que la montmorillonite était le minéral smectique de ces argiles. Le couplage des analyses chimiques et minéralogiques permet une quantification minéralogique moyenne: 74% de Montmorillonite; 6% de Kaolinite; 8% de talc. Les matériaux de Bana sont riche en smectite et peuvent dont être valorisés dans les domaines tels que l’absorption, l’agriculture ou de l’imperméabilisation des sols. [less ▲]

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See detailPhysicochemical And Biochemical Characterization Of Non-Biodegradable Cellulose In Miocene Gymnosperm Wood From The Entre-Sambre-Et-Meuse, Southern Belgium
Lechien, Valérie; Rodriguez, Christian; Ongena, MARC ULg et al

in Organic Geochemistry (2006), 37(11), 1465-1476

Specimens of Miocene fossil wood from the Entre-Sambre-et-Meuse karsts (southern Belgium) were examined using physicochemical and biochemical techniques in order to understand the reasons for the ... [more ▼]

Specimens of Miocene fossil wood from the Entre-Sambre-et-Meuse karsts (southern Belgium) were examined using physicochemical and biochemical techniques in order to understand the reasons for the exceptional preservation of these fossilized remains after 15 million years. Structural and chemical changes were assessed by comparing the structural features of the fossil samples with those of their modern counterpart, Metaseguoia. Solid state C-13 nuclear magnetic resonance (NMR) and microscopic analysis showed good preservation of the cellulose structure in the fossil wood from the Florennes peat deposit. Despite the substantial cellulose fraction available in the fossil tissue, an enzymatic degradation test and a biochemical methane potential assay showed that the fossil cellulose could not be degraded by cellulases and anaerobic microorganisms usually involved in the biodegradation of organic matter. Moreover, the cellulose structure (crystallinity and surface area) seemed to have no effect on cellulose biodegradability in these Miocene fossil wood samples. On the basis of our observations, we suggest that the presence of a modified lignin structure could greatly influence cellulose preservation/biodegradability. [less ▲]

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See detailPhysicochemical and fuctional properties of defatted canola meal residu and its potential use as a source of dietary fibre
BENNAMOUN, Lyes

Scientific conference (2010, May 16)

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See detailPhysicochemical and functional properties of starches from sorghum cultivated in the Sahara of Algeria
Boudries, Nadia; Belhaneche, Naima; Nadjemi, Boubekeur et al

in Carbohydrate Polymers (2009), 78(3), 475-480

Pure starches were isolated from white and red sorghum cultivated in Tidikelt, a hyper and region situated in south Algeria. Amylose content, X-ray pattern and theological properties of starches were ... [more ▼]

Pure starches were isolated from white and red sorghum cultivated in Tidikelt, a hyper and region situated in south Algeria. Amylose content, X-ray pattern and theological properties of starches were examined. The amylose content in white sorghum starch (27.1%) was slightly higher than that in red sorghum (24.8%). The swelling power and the solubility behavior of both starches were nearly similar below 65 degrees C. At higher temperatures, starch isolated from the white sorghum cultivar showed higher swelling power and lower solubility index than pigmented sorghum starch. The pasting properties of starches determined by RVA, Rapid Visco Analyser showed different viscosity peaks. Red sorghum starch had a higher value (4731 cP) than white sorghum starch (4093 cP). For both sorghum, X-ray diffractograms exhibit an A-type diffraction pattern, typical of cereal starches and the relative degrees of crystallinity were estimated at 22.72% and 28.91%, respectively, for local white and red sorghum starch. DSC analysis revealed that sorghum starches present higher temperatures at the peak (70.60 and 72.28 degrees C for white and red sorghum starches, respectively) and lower gelatinization enthalpies (9.087 and 8.270 J/g for white and red sorghum starches, respectively) than other cereal starches. The results showed that physicochemical and functional properties of sorghum cultivar starches were influenced by the genotype and the environment. (C) 2009 Elsevier Ltd. All rights reserved. [less ▲]

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See detailPhysicochemical and functional properties of typical tunisian drink: date palm sap (Phoenix dactylifera L.)
Ben Thabet, Imène; Attia, Hamadi; Besbes, Souhail et al

in Food Biophysics (2007), 2(2), 76-82

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See detailPhysicochemical and structural properties of compound dairy fat blends
Danthine, Sabine ULg

in Food Research International (2012), 48

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See detailPhysicochemical causes for the microstructure of melt-textured YBa2Cu3O7-delta/Y2BaCuO5 composites
Vandewalle, Nicolas ULg; Cloots, Rudi ULg; Ausloos, Marcel ULg

in Superconductor Science and Technology (1997), 10(3), 123-133

We report semiquantitative results for a physicochemical model intended to describe the multigrain growth of YBa2Cu3O7-deltaN2BaCuO5 (123/211) composites under isothermal undercooling. This model takes ... [more ▼]

We report semiquantitative results for a physicochemical model intended to describe the multigrain growth of YBa2Cu3O7-deltaN2BaCuO5 (123/211) composites under isothermal undercooling. This model takes into account various ingredients supposed to be controlling the growth of such superconducting compounds, i.e. the presence of secondary phases. Moreover, a possible dynamical interaction between the growing 123 grains and the 211 solid particles is also included. The numerical investigations were performed for a model bivariate-like 211 particle distribution. The complete chemical dissolution of the small particles is allowed but the large ones are only partially dissolved in the first step which can be followed when chemically possible by a complete dissolution. The model is restricted to a two-dimensional square lattice. Various microstructural morphologies are obtained as a function of the initial composition of the melt and the initial size distributions of the 211 particles. Results are in quite good agreement with experimental observations. The quantity of 123 phase is predicted depending on the initial conditions. The optimal situation when a minimum fraction of liquid phase segregates at the gain boundaries is found to occur for 20 % excess of 211 phase in the initial melt. [less ▲]

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See detailPhysicochemical Characteristics of Date Sap Lagmi from Deglet Nour Palm (Phoenix Dactylifera L.)
Ben Thabet, Imene; Besbes, Souhail; Attia, Hamadi et al

in International Journal of Food Properties (2009), 12(3), 659-670

Physicochemical properties of sap from Deglet Nour date palm (Phoenix dactylifera L.) were studied. Composition analysis revealed (on a dry-weight basis) a high content of carbohydrates (94.98 g/100 g of ... [more ▼]

Physicochemical properties of sap from Deglet Nour date palm (Phoenix dactylifera L.) were studied. Composition analysis revealed (on a dry-weight basis) a high content of carbohydrates (94.98 g/100 g of dry matter basis) mainly sucrose, 2.72 g/100g (dry matter basis) of proteins and 2.29 g/100 g (dry matter basis) of ash. Date palm sap also contains 7.64 mg gallic acid equivalent/100 ml of total polyphenol. Thus, date palm sap showed antioxidant activity with a percentage inhibition of the DPPH radical value of 47.64%. Surface and foaming properties were also performed by drop volume and bubbling method, respectively. Equilibrium surface tension of fresh sap was 63.51 mN/m. Freeze-drying method preserved surface activity. Native sap showed better foam power (1.03) and foam stability (1150 s) than solutions prepared from lyophilised sap (5-30 g /100g of solution). Results demonstrated that this natural juice could be regarded as functional food due to its high nutritional value, antioxidant activity, surface activity, and foam power. [less ▲]

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