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See detailLe minerai de fer en Wallonie, Histoire et Géologie
Denayer, Julien ULg

Conference given outside the academic context (2012)

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See detailLe minerai de fer en Wallonie
Denayer, Julien ULg

Conference (2010, November)

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See detailLe minerai de fer en Wallonie: cartographie, historique et géologie
Denayer, Julien ULg; Pacyna, Daniel; Boulvain, Frédéric ULg

Book published by Ed. de la Région Wallonne (2011)

Detailed reference viewed: 912 (128 ULg)
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See detailMineral buffers as aids in adaptation to a high concentrate diet by sheep and their influence on the digestibility of a high grain ration.
Flament, E.; Thewis, André ULg; Claustriaux, Jean-Jacques ULg et al

in Proceedings: the 32nd Annual Meeting of the European Association for Animal Production (1981)

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See detailMineral mapping in salt lakes from Sud Lipez (Bolivia) using Aster images
Caceres, Fernando; Ali-Ammar, Hamid; Pirard, Eric ULg

in Geological Remote Sensing Group Newsletter (2004), (38), 15-19

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See detailMineralization kinetics in murine trabecular bone quantified by time-lapsed in vivo micro-computed tomography
Lukas, Carolin; Ruffoni, Davide ULg; Lambers, Floor M. et al

in BONE (2013), 56(1), 55-60

Trabecular bone is a highly dynamic tissue due to bone remodeling, mineralization and demineralization. The mineral content and its spatial heterogeneity are main contributors to bone quality. Using time ... [more ▼]

Trabecular bone is a highly dynamic tissue due to bone remodeling, mineralization and demineralization. The mineral content and its spatial heterogeneity are main contributors to bone quality. Using time-lapsed in vivo micro-computed tomography (micro-CT), it is now possible to resolve in three dimensions where bone gets resorbed and deposited over several weeks. In addition, the gray values in the micro-CT images contain quantitative information about the local tissue mineral density (TMD). The aim of this study was to measure how TMD increases with time after new bone formation and how this mineralization kinetics is influenced by mechanical stimulation. Our analysis of changes in TMD was based on an already reported experiment on 15-week-old female mice (C57BL/6), where in one group the sixth caudal vertebra was mechanically loaded with 8 N, while in the control group no loading was applied. Comparison of two consecutive images allows the categorization of bone into newly formed, resorbed, and quiescent bone for different time points. Gray values of bone in these categories were compared layer-wise to minimize the effects of beam hardening artifacts. Quiescent bone in the control group was found to mineralize with a rate of 8 +/- 1 mgHA/cm(3) per week, which is about half as fast as observed for newly formed bone. Mechanical loading increased the rate of mineral incorporation by 63% in quiescent bone. The week before bone resorption, demineralization could be observed with a drop of TMD by 36 +/- 4 mgHA/cm(3) in the control and 34 +/- 3 mgHA/cm(3) in the loaded group. In conclusion, this study shows how time-lapsed in vivo micro-CT can be used to assess changes in TMD of bone with high spatial and temporal resolution. This will allow a quantification of how bone diseases and pharmaceutical interventions influence not only microarchitecture of trabecular bone, but also its material quality. (C) 2013 Elsevier Inc. All rights reserved. [less ▲]

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See detailMineralization of bio-based materials: effect on cement-based mix properties
Courard, Luc ULg; Darimont, Anne ULg; Louis, Arnaud ULg et al

in Bulletin of the Polytechnic Institute of Jassy, Construction. Architecture Section (2011), LIV(LVIII),

The lightweight concrete with bio-based products knows an interesting development in the construction field, especially as thermal insulation panels for walls in buildings. Before identifying and ... [more ▼]

The lightweight concrete with bio-based products knows an interesting development in the construction field, especially as thermal insulation panels for walls in buildings. Before identifying and quantifying the basic physical characteristics of concrete made from wood, miscanthus, hemp or bamboo (acoustic and thermal properties in particular), it is necessary to optimize the composition of the product. It is clear that the final product is not unique and a compromise has to be found between insulation and mechanical properties. The long term stability as well as the reinforcement may be obtained by means of a mineralization process of the natural product: a preparation with a lime and/or cement-based material is necessary to reinforce the cohesion of the bio-based product. Optical and SEM analysis helped to clearly understand the interactions between the bio-based fibrous material and the cementitious materials, the quality of the bond and their effects on the properties of the cement-based concrete products. [less ▲]

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See detailMINERALOGICAL ANALYSIS OF THE “ RED ORE” FLOTATION CIRCUIT – KANSANSHI .
Bastin, David ULg; Kottgen, Axel

Report (2009)

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See detailMineralogical and Chemical Characterizations of Natural Clays from NW Cameroon
Mache, Jacques Richard ULg; Fagel, Nathalie ULg; Njoya, André

Poster (2012, June)

In this study physical and chemical characterization of seven clay samples from Cameroon is reported. The various analysis show that the main clay mineral in all samples is smectite with a small amount of ... [more ▼]

In this study physical and chemical characterization of seven clay samples from Cameroon is reported. The various analysis show that the main clay mineral in all samples is smectite with a small amount of kaolinite; some non clay minerals as cristobalite, K-feldspars, plagioclase, ilmenite and quartz are also present. The Cation Exchange Capacities range from 24.2 to 62.0 meq/100g. The specific surface area range from 58 to 123 m2/g. The chemical composition of the clays is dominated by SiO2, Al2O3 and Fe2O3 whereas MgO and Na2O are present only in small quantities. [less ▲]

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See detailMineralogical and geotechnical characterization of clays from Northern Morocco for their potential use in ceramic industry
El Ouahabi, Meriam ULg; Daoudi, Lahcen; Fagel, Nathalie ULg

in Clay Minerals (2014), 49

This study focuses on the mineralogical and geotechnical characterization of Northern Morocco clays (i.e., from Tangier and Tetouan areas) and further comparison with main clay ores used in national ... [more ▼]

This study focuses on the mineralogical and geotechnical characterization of Northern Morocco clays (i.e., from Tangier and Tetouan areas) and further comparison with main clay ores used in national ceramic (i.e., from Meknes, Fes, Salé and Safi regions). Sampled clays were analyzed by X-ray diffraction on bulk and clay (< 2 µm) fractions to identify the mineralogical assemblages of the clay outcrops. Further analyses were conducted to determine the particle size distribution (laser diffraction particle analyser), the total organic matter content (from LossOnIgnition measurements) and the Atterberg limits of the raw clays. The aims of this study were first to investigate the spatial variability of the clay samples and second to evaluate their potential application as raw materials in ceramic industry. Tetouan and Tangier clays are characterized by diversified mineralogical assemblages (in particular a variable proportion of clay, quartz and calcite) in regard with Meknes, Fes, Salé and Safi clays (high clay content, quartz and calcite). The clay fraction of Tetouan and Tangier samples is dominated by illite and kaolinite with variable contribution of chlorite, smectite and/or vermiculite. Illite is the dominant phase in Meknes, Fes, Safi and Salé clays, but is associated with kaolinite. There is no direct relationship between the mineral assemblage composition and the lithology of the series. The studied clays materials consist generally in fine particles with medium to high plasticity and low organic matter content. Taking into account mineralogy, grain-size distribution and plasticity those clays seem to be suitable as raw material for the growing Morocco ceramic industry. [less ▲]

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See detailA mineralogical and microstructural study of 7 eucrites (A-881394, Y-791195, Y-981617, Y-790266, Y-791186, Y-792510, Y-793591)
Foucart, Hélène ULg; Holness, Marian; Namur, Olivier ULg et al

Conference (2012)

The mineral chemistry and the detailed microstructure of seven eucrites (A-881394, Y-791195, Y-981617, Y-790266, Y-791186, Y-792510 and Y-793591) of the NIPR collection of Antarctic meteorites have been ... [more ▼]

The mineral chemistry and the detailed microstructure of seven eucrites (A-881394, Y-791195, Y-981617, Y-790266, Y-791186, Y-792510 and Y-793591) of the NIPR collection of Antarctic meteorites have been examined in order to constrain their modal mineralogy and chemistry and to explore the potential of microstructural analysis as a new tool for interpreting meteorites. [less ▲]

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See detailMineralogical and Physical Changes during Sintering of Plastic Red Clays from Sanaga Swampy Valley, Cameroon.
Nzeukou, Aubin; Traina, K.; Mjedo, E.R. et al

in International ceramique review (2014), 63(4), 186-192

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See detailMineralogical characteristics of copper flotation products from Cayeli mine, Turkey and their influence to mineral processing
Strashimirov, S.; Dobrev, S.; Stamenov, S. et al

in Annual of the University of Mining and Geology, Sofia, 47, I, 147-153 (2004)

The paper presents mineralogical characteristics and pecularities of minerals distribution in products from Cu cycle of clastic ore mineral processing in Cayeli concentrator, Turkey. Special attention has ... [more ▼]

The paper presents mineralogical characteristics and pecularities of minerals distribution in products from Cu cycle of clastic ore mineral processing in Cayeli concentrator, Turkey. Special attention has been drawn to the mineralogical pecularities of sphalerite. The study has covered 16 samples from Cu flotation feed, Cu rougher concentrate, Cu final concentrate and tailing, each sieved in 4 granulometric classes. Significant quantity of sphalerite charactarized by higher amount of Cu and Fe as isomorphic impurities or extemely fine crystals of chalcopyrite are present in the Cu concentrate. Based on the performed studies, an improvement in the processing circuit has been suggested - especially in the grinding and hydrocycloning circuits. [less ▲]

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See detailMineralogical characterization of a gold ore through a computational mineral liberation analysis
Rojas, Ronald; Torem, Mauricio; Merma, Antonio et al

in Proceedings of the XV Balkan Mineral Processing Congress - BMPC 2013 (2013, June)

This work presents the mineralogical characterization of a very low-grade Brazilian gold ore. The aim is to provide mineralogical information and liberation distribution characteristics in order to assess ... [more ▼]

This work presents the mineralogical characterization of a very low-grade Brazilian gold ore. The aim is to provide mineralogical information and liberation distribution characteristics in order to assess a possible economic byproducts recovery. This may include a direct tailings processing or alternative gold processing routes. It was studied the distribution of all minerals present in the ore, mainly the gangue minerals. Distribution based on speciation, particle size, mineralogical association and liberation determined through the use of the automated analytical Scanning Electron Microscope technique (MLA). The study is complemented with chemical and mineralogical analysis by XRF and XRD respectively. It also includes particle size analysis, gravity separation and magnetic separation tests. Chemical analysis showed that the ore consists essentially of SiO2 (62.33%), Al2O3 (15.95%), Fe2O3 (7.66%), K2O (4.60%), TiO2 (1%) and others (8.46%). Based on this analysis, the study was mainly directed to the characterization of titanium-bearing minerals due to its economic importance. Therefore, minerals as ilmenite, rutile and anatase were identified as the Ti-bearing minerals. After a meticulous analysis of the results, it was identified a possible route for processing TiO2, taking into account the mineralogical and liberation point of view. [less ▲]

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