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See detailSupercritical Fluid Chromatography in Traditional Chinese Medicine Analysis
Huang, Yang ULiege; Tang, Guangyun; Zhang, Tingting et al

in Journal of Pharmaceutical and Biomedical Analysis (2017)

Traditional Chinese medicines (TCMs) are gaining increasing popularity throughout the world due to their long historical clinical practices. Highly efficient analytical separation tools are essential for ... [more ▼]

Traditional Chinese medicines (TCMs) are gaining increasing popularity throughout the world due to their long historical clinical practices. Highly efficient analytical separation tools are essential for investigating the mysterious properties of TCMs and their quality control. Supercritical fluid chromatography (SFC) showed a great potential in TCM analysis for both nonpolar and polar components. In this paper, an overview of the experimental conditions (i.e. detection mode, stationary phase, mobile phase composition, pressure and temperature) used in SFC for achiral separations of TCM components is presented and recent applications to the analysis of different classes of compounds extracted from TCMs, such as lipids, terpene and terpenoids, phenolic compounds, flavonoids, alkaloids, saponins and carbohydrates, will be briefly described. [less ▲]

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See detailEnhancing CIDOC - CRM and compatible models with the concept of multiple interpretation
Van Ruymbeke, Muriel ULiege; Hallot, Pierre ULiege; Billen, Roland ULiege

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2017, August 17), Volume IV-2/W2

Modelling cultural heritage and archaeological objects is used as much for management as for research purposes. To ensure the sustainable benefit of digital data, models benefit from taking the data ... [more ▼]

Modelling cultural heritage and archaeological objects is used as much for management as for research purposes. To ensure the sustainable benefit of digital data, models benefit from taking the data specificities of historical and archaeological domains into account. Starting from a conceptual model tailored to storing these specificities, we present, in this paper, an extended mapping to CIDOC-CRM and its compatible models. Offering an ideal framework to structure and highlight the best modelling practices, these ontologies are essentially dedicated to storing semantic data which provides information about cultural heritage objects. Based on this standard, our proposal focuses on multiple interpretation and sequential reality. [less ▲]

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See detailLa influencia normativa de China en América Latina y en el Caribe: ¿Un desafío estratégico para la Unión Europea?
Wintgens, Sophie ULiege

Scientific conference (2017, August 16)

El crecimiento de los intercambios económicos y comerciales entre China y el subcontinente latinoamericano va acompañado de la imposición de normas económicas y políticas, de la cual su política de ... [more ▼]

El crecimiento de los intercambios económicos y comerciales entre China y el subcontinente latinoamericano va acompañado de la imposición de normas económicas y políticas, de la cual su política de comercio internacional es portadora. Esta constatación plantea la cuestión del desafío que esta influencia normativa china representa para la estrategia desplegada por la Unión Europea en América Latina y el Caribe. A fin de responder a esta cuestión, esta presentación contiene dos objetivos relacionados entre sí: por una parte, analizar el alcance normativo de la política comercial de China en ALC, con el fin de ver si ella es portadora de un proyecto político-económica regional comparable al modelo de integración y de gobernabilidad regional desplegado por la UE en el subcontinente latinoamericano; por otra parte, medir de la influencia de la producción normativa china en ALC a través de su capacidad para competir con las normas exportadas por la UE en esta región del mundo. [less ▲]

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See detailMagma storage conditions and processes at Calbuco volcano (Central Southern Volcanic Zone, Chile)
Montalbano, Salvatrice ULiege; Namur, Olivier ULiege; Schiano, Pierre et al

Poster (2017, August 16)

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See detailCompositional gap at La Picada (CSVZ, Chile) results from critical cristallinity and compaction
Vander Auwera, Jacqueline ULiege; Namur, Olivier ULiege; Coumont, Valentin et al

Poster (2017, August 16)

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See detailComplete mitogenome sequence of Ricasolia amplissima (Lobariaceae) reveals extensive mitochondrial DNA rearrangement within the Peltigerales (lichenized ascomycetes)
Simon, Antoine ULiege; Liu, Yang; Sérusiaux, Emmanuël ULiege et al

in Bryologist (2017), 120(3), 335-339

The structure of mitochondrial genomes varies among non-lichenized fungi in terms of their genic and intronic content and genic order. Whether lichenized fungal mitogenomes are equally labile is unknown ... [more ▼]

The structure of mitochondrial genomes varies among non-lichenized fungi in terms of their genic and intronic content and genic order. Whether lichenized fungal mitogenomes are equally labile is unknown due to the paucity of available mitogenomes. We assembled the mitogenome of Ricasolia amplissima (Peltigerales, Lobariaceae), using massive parallel sequencing, and compared its structure to that of two species of Peltigera (Peltigeraceae). The mitochondrial genome of R. amplissima comprised 82,333 bp, with a 29.8% G+C content, and holds 15 unique protein-coding genes, 29 tRNA genes, two rRNA genes, and one non-coding RNA gene. Although the protein-coding gene content in the mitogenome of Peltigera and Ricasolia was identical, the relative gene order differed substantially, revealing that significant gene rearrangements also characterize the evolution of mitogenomes of lichenized ascomycetes at a relatively shallow phylogenetic depth, such as within the order Peltigerales. [less ▲]

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See detailProtein–polysaccharide complexes for enhanced protein delivery in hyaluronic acid templated calcium carbonate microparticles
Ramalapa, Bathabile ULiege; Crasson, Oscar ULiege; Vandevenne, Marylène ULiege et al

in Journal of Materials Chemistry B (2017), 5

The controlled delivery of proteins within calcium carbonate (CaCO3) particles is currently widely investigated. The success of these carriers is driven by ionic interactions between the encapsulated ... [more ▼]

The controlled delivery of proteins within calcium carbonate (CaCO3) particles is currently widely investigated. The success of these carriers is driven by ionic interactions between the encapsulated proteins and the particles. This poses a great limitation on the successful loading of proteins that have no ionic affinity to CaCO3. In this study, we explored the use of polysaccharide–protein interactions to strongly enhance the encapsulation of proteins in CaCO3 microparticles. Previously, Vandevenne and colleagues inserted a human chitin binding domain (ChBD) that has intrinsic affinity for hyaluronic acid (HA) into a β-lactamase (BlaP). This generated chimeric protein, named BlaPChBD, was shown to be fully bifunctional. In this study we showed that this hybrid protein can associate with HA and be successfully loaded into vaterite CaCO3 microparticles using supercritical CO2 (ScCO2) technology aided by the templating effect of HA on CaCO3. The presence of ChBD inserted into BlaP increased the encapsulation of the protein by 6-fold when complexed with HA. Furthermore, thrombin cleavage sites were engineered on both sides of the inserted ChBD in the chimeric BlaP to achieve release of the protein from the microparticles by protease cleavage. Our results showed that thrombin cleavage increased the release of the protein from the microparticles within 36 hours from <20% to 87%. In conclusion, the presence of ChBD successfully improved the encapsulation yield of the protein while retaining up to 82% of its activity and efficient release of the protein from the microparticles was achieved by protease cleavage. [less ▲]

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See detailPOINT CLOUD CLASSIFICATION OF TESSERAE FROM TERRESTRIAL LASER DATA COMBINED WITH DENSE IMAGE MATCHING FOR ARCHAEOLOGICAL INFORMATION EXTRACTION
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences (2017, August 16), IV-2/W2

Reasoning from information extraction given by point cloud data mining allows contextual adaptation and fast decision making. However, to achieve this perceptive level, a point cloud must be semantically ... [more ▼]

Reasoning from information extraction given by point cloud data mining allows contextual adaptation and fast decision making. However, to achieve this perceptive level, a point cloud must be semantically rich, retaining relevant information for the end user. This paper presents an automatic knowledge-based method for pre-processing multi-sensory data and classifying a hybrid point cloud from both terrestrial laser scanning and dense image matching. Using 18 features including sensor’s biased data, each tessera in the high-density point cloud from the 3D captured complex mosaics of Germigny-des-prés (France) is segmented via a colour multi-scale abstraction-based featuring extracting connectivity. A 2D surface and outline polygon of each tessera is generated by a RANSAC plane extraction and convex hull fitting. Knowledge is then used to classify every tesserae based on their size, surface, shape, material properties and their neighbour’s class. The detection and semantic enrichment method shows promising results of 94% correct semantization, a first step toward the creation of an archaeological smart point cloud. [less ▲]

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See detailIMPROVED GALACTOSE ISOMERASES AND USE THEREOF IN THE PRODUCTION OF TAGATOSE
François, Jean-Marie; Couson, Mélody; Bouleau, Cindy et al

Patent (2017)

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See detail3D thermal finite element analysis of laser cladding processed Ti-6Al-4V part with microstructural correlations
Tran, Hoang Son ULiege; Tchuindjang, Jérôme Tchoufack ULiege; Paydas, Hakan ULiege et al

in Materials & Design (2017), 128

In this study, a 3D thermal model of laser cladding by powder injection applied to Ti-6Al-4V is developed. The manufactured part is made of a Ti-6Al-4V substrate on which successive layers of laser melted ... [more ▼]

In this study, a 3D thermal model of laser cladding by powder injection applied to Ti-6Al-4V is developed. The manufactured part is made of a Ti-6Al-4V substrate on which successive layers of laser melted powder are added, leading to a thick deposit. The computed temperature field and its time evolution are compared to experimental measurements. The temperature distribution in the substrate allows the prediction of the depths of the melt pool and the heat affected zone. Correlations between simulated thermal histories and the final microstructure in the thick deposit are established, leading to the enhancement of a dynamic shift of the critical transformation points due to high thermal rates during laser processing. The nature of the phases present within the deposit is discussed. [less ▲]

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See detailVisible-light TiO2 photocatalyst doped with silylated porphyrin
Mahy, Julien ULiege; Pàez Martinez, Carlos ULiege; Léonard, Géraldine ULiege et al

Conference (2017, August 15)

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See detailIn vitro evaluation of the competing effect of Carnobacterium maltaromaticum isolated from vacuum packed meat against food pathogens
Maia Danielski, Gabriela ULiege; Didimo Imazaki, Pedro Henrique ULiege; Daube, Georges ULiege et al

Conference (2017, August 15)

Foodborne disease outbreaks are one of the leading causes of infections, hospitalizations and deaths provoked by pathogenic bacteria including Escherichia coli O157:H7, Listeria monocytogenes and ... [more ▼]

Foodborne disease outbreaks are one of the leading causes of infections, hospitalizations and deaths provoked by pathogenic bacteria including Escherichia coli O157:H7, Listeria monocytogenes and Salmonella spp. Carnobacterium maltaromaticum is a lactic acid bacteria, which could prevent the growth of pathogens in refrigerated food. The aim of this study was to determine the bioprotective potential of three strains of C. maltaromaticum isolated from chilled vacuum packed beef. They were tested in vitro against the pathogens described above. The results indicate that the selected strains have an antilisterial activity, which is optimized at low temperatures. Moreover, when the strains were combined with EDTA it was observed a slight, but significant, inhibition of the gram-negative bacteria used in this study. [less ▲]

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See detailInternet, vecteur d'un nouvel élan politique ?
Demelenne, Céline; Grandjean, Geoffrey ULiege

Article for general public (2017)

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See detailSense-Making in Cyber Security - Examining Responder Behaviors in Cyber-Attacks
Tapanainen, Tommi ULiege

in Proceedings of the Americas Conference on Information Systems (AMCIS) (2017, August 12)

Our understanding of the defense mechanisms against cyber-attacks is, to a great extent, based on preparation and deterrence. There is limited understanding, and in particular, limited evidence on how ... [more ▼]

Our understanding of the defense mechanisms against cyber-attacks is, to a great extent, based on preparation and deterrence. There is limited understanding, and in particular, limited evidence on how cyber security responders act to contain and recover from a cyber-attack. The actions of responders, including IT experts, corporate communications staff, and selected managers are critical. To address this gap, this research proposes applying the concept of sense-making, which has been extensively used to analyze human crisis behaviors. In this emerging research, we conduct an investigation into a cyber-attack case to shed light on the contextual and collective activities taken by responders in coping with cyber-attack response. We expect the results to validate or challenge theorizations of cyber security training and competencies from the communication and collaboration perspective. In a practical sense, our research can stimulate organizations to reflect on their own cyber security preparedness from the human perspective. [less ▲]

Detailed reference viewed: 59 (4 ULiège)
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See detailSuperparamagnetic colloids in viscous fluids
Darras, Alexis ULiege; Opsomer, Eric ULiege; Vandewalle, Nicolas ULiege et al

in Scientific Reports (2017), 7

The influence of a magnetic field on the aggregation process of superparamagnetic colloids has been well known on short time for a few decades. However, the influence of important parameters, such as ... [more ▼]

The influence of a magnetic field on the aggregation process of superparamagnetic colloids has been well known on short time for a few decades. However, the influence of important parameters, such as viscosity of the liquid, has received only little attention. Moreover, the equilibrium state reached after a long time is still challenging on some aspects. Indeed, recent experimental measurements show deviations from pure analytical models in extreme conditions. Furthermore, current simulations would require several years of computing time to reach equilibrium state under those conditions. In the present paper, we show how viscosity influences the characteristic time of the aggregation process, with experimental measurements in agreement with previous theories on transient behaviour. Afterwards, we performed numerical simulations on equivalent systems with lower viscosities. Below a critical value of viscosity, a transition to a new aggregation regime is observed and analysed. We noticed this result can be used to reduce the numerical simulation time from several orders of magnitude, without modifying the intrinsic physical behaviour of the particles. However, it also implies that, for high magnetic fields, granular gases could have a very different behaviour from colloidal liquids. [less ▲]

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See detailA novel approach towards manipulation of vortex matter in a superconductor with micromagnetic structures
Shaw, Gorky ULiege

Poster (2017, August 10)

Hard permanent magnetic materials offer a number of advantages over softer magnetic materials as sources of vortex pinning in a superconductor, like greater stability and larger magnetic field amplitudes ... [more ▼]

Hard permanent magnetic materials offer a number of advantages over softer magnetic materials as sources of vortex pinning in a superconductor, like greater stability and larger magnetic field amplitudes. Permanent micromagnet structures prepared using thermomagnetic patterning (TMP) present an interesting and so far unexplored option for controlled artificial pinning. We have investigated the vortex matter in superconductor/TMP micromagnet heterostructures (Nb-NdFeB) using quantitative Magneto-Optical Imaging (MOI). Comprehensive protocols have been developed for calibrating and converting Faraday rotation data acquired by MOI to magnetic field maps. These protocols reveal the comparatively weaker magnetic response of the superconductor from the background of larger fields associated with the magnetic layer in its vicinity. Further, TMP micromagnet structures have been imprinted in a Permalloy (Py) layer to obtain flexible magnetic landscapes for flux guidance in a Nb layer below it. Both smooth flux penetration and vortex avalanches in Nb are observed to be strongly influenced by the micromagnetic patterns. Our study offers new insights into the peculiarities of the vortex state in these superconductor-micromagnet heterostructures. [less ▲]

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See detailTailoring the superconducting properties of niobium nanoconstrictions via electro-annealing
Lombardo, Joseph ULiege; Baumans, Xavier ULiege; Jelic, Zeljko ULiege et al

Poster (2017, August 10)

In this work we report the possibility to create weak links in nanostructured Nb thin films using electro-annealing. By using electron-assisted atom diffusion in Nb nanconstrictions, we were able to ... [more ▼]

In this work we report the possibility to create weak links in nanostructured Nb thin films using electro-annealing. By using electron-assisted atom diffusion in Nb nanconstrictions, we were able to locally change the material properties (superconducting critical temperature and normal resistance). When the critical temperature of the nanoconstriction is sufficiently decreased, the field dependence of the critical current exhibits a Fraunhofer-like pattern, confirming the formation of the weak link. Scanning electron microscopy images clearly reveals the structural change underwent by the constriction resulting from the effect of the high current density. Numerical simulations within the Ginzburg-Landau formalism are also presented. These findings represent the first evidence of weak link formation by electro-annealing and provide an easy method for the fabrication of Josephson junctions with tunable resistance and critical temperature in Nb thin films. [less ▲]

Detailed reference viewed: 31 (8 ULiège)