Recursos de colección

ORBi Open Repository and Bibliography (259.467 recursos)

In may 2007, the ULg's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (Board's decision). This decision led to the official launch, in November 2008, of the ORBi platform including both the Academic Bibliography and the Institutional Repository of the Wallonia-Europe University Academy.

Life sciences

Mostrando recursos 1 - 20 de 18.390

  1. Guiana Dolphins (Sotalia guianensis) and DR-CALUX for Screening Coastal Brazilian Environments for Dioxins and Related Compounds

    Dorneles, Paulo; Lailson-Brito, Jose; Bisi, Tatiana; Domit, Camilla; Barbosa, Lupercio; O. Meirelles, Ana; Carvalho, Vitor; Malm, Olaf; Azevedo, Alexandre; Brose, François; Das, Krishna; Scippo, Marie-Louise
    Peer reviewed

  2. Impacts of entomopathogenic fungi on biology and behaviour of the invasive Brown Marmorated Stink Bug (Hemiptera, Pentatomidae)

    Fingu Mabola, Junior Corneille; Serteyn, Laurent; Bawin, Thomas; Delvigne, Frank; Francis, Frédéric
    Halyomorpha halys St˚al (Hemiptera, Pentatomidae) is an invasive stink bug coming from Eastern Asia. Besides causing important yields losses in orchards, crop and vegetable fields, it overwinters inside houses as agglomerates of dozens. In Europe, this Brown Marmorated Stink Bug (BMSB) was accidentally introduced in Switzerland in 2007 and has been later observed in surrounding countries (France, Italy, Germany). Based on the current US situation, we can reasonably fear that BMSB will have colonized most of Europe countries in less than a decade. If we already discern a few fungus strains that are efficient against BMSB, very little is known about their actual impact on the insect...

  3. Interspecific variation of warning calls in piranhas: comparative analysis

    Mélotte, Geoffrey; Michel, Christian; Vigouroux, Régis; Parmentier, Eric
    Peer reviewed

  4. Caractérisation des mécanismes impliqués dans la perception de rhamnolipides naturels et synthétiques chez Arabidopsis thaliana

    Luzuriaga Loaiza, Walter; Schellenberger, Romain; Obounou Akong, Firmin; Menhour, Boudjema; Borie, Nicolas; Risch, Alexandra; Villaume, Sandra; Baillieul, Fabienne; Deleu, Magali; Lins, Laurence; Fauconnier, Marie-Laure; Clément, Christophe; Zipfel, Cyril; Hubert, Jane; Renault, Jean-Hugues; Haudrechy, Arnaud; Bouquillon, Sandrine; Ongena, Marc; Crouzet, Jerôme; Dorey, Stéphan

  5. Detecting population substructures

    Chaichoompu, Kridsadakorn

  6. Capturing structure in IIBDGC samples

    Chaichoompu, Kridsadakorn

  7. ipPCA clustering to find substructures in populations or patient collections

    Chaichoompu, Kridsadakorn

  8. Capturing fine-level structure using unsupervised clustering method with multiple data types

    Chaichoompu, Kridsadakorn; Tongsima, Sissades; Shaw, Philip James; Sakuntabhai, Anavaj; Van Steen, Kristel
    Several methods exist to detect shared genetic ancestry or to identify population substructure using SNP-based or haplotype-based information (Price et al. 2006, Lawson et al. 2012). Here, we propose an unsupervised clustering method built on the ipPCA algorithm (Intarapanich et al. 2009). Our method supports both ordinal and categorical data, and it can be applied to panels of single locus and/or multiple loci data, or gene-based integrative summaries (Fouladi et al. 2015). Our method involves an iterative process using binary and ternary splits based on multivariate Gaussian mixture modeling of PCs and Clustering EM estimation as in (Lebret et al....

  9. A novel unsupervised clustering approach with multiple data types to reveal fine-level structure

    Chaichoompu, Kridsadakorn; Tongsima, Sissades; Shaw, Philip James; Sakuntabhai, Anavaj; Van Steen, Kristel
    Introduction: Several methods exist to identify population substructure that is due to shared genetic ancestry or regional proximity. These may be SNP-based or haplotype-based (Price et al. 2006, Lawson et al. 2012). Here, we present a flexible unsupervised clustering approach that is built on the ipPCA machinery (Intarapanich et al. 2009). Methods: Our method supports both numeric and categorical data, and can be applied to panels of SNPs and/or haplotypes, or gene-based integrative summaries (Fouladi et al. 2015). Unlike ipPCA, our method involves an iterative process using binary and ternary splits based on multivariate Gaussian mixture modeling of PCs and Clustering...

  10. Combining Genotype with LD-based haplotype information as input for iterative pruning principal component analysis (ipPCA) to improve population clustering

    Chaichoompu, Kridsadakorn; Fouladi, Ramouna; Wangkumhang, Pongsakorn; Wilantho, Alisa; Chareanchim, Wanwisa; Shaw, Philip James; Tongsima, Sissades; Sakuntabhai, Anavaj; Van Steen, Kristel
    Single Nucleotide Polymorphisms (SNPs) are commonly used to capture variations between populations and often genome-wide SNP data are pruned based on linkage disequilibrium (LD) patterns. To identify and differentiate between subpopulations using a rich set of genetic markers, as using reduced sets of genetic markers for these purposes, can become challenging especially when similar geographic regions are involved or when spurious patterns are likely to exist. Notably, haplotype composition and the pattern of LD between markers may vary between larger populations but may also play a role within more confined geographic regions. Indeed, the structure of haplotypes in unrelated individuals...

  11. Detecting patient subgroups using reduced set of disease-related markers with iterative pruning Principal Component Analysis (ipPCA)

    Chaichoompu, Kridsadakorn; Cleynen, Isabelle; Fouladi, Ramouna; Ellinghaus, David; Hübenthal, Matthias; Van Steen, Kristel; on behalf of the International inflammatory bowel disease genetics consortium (IIBDGC)
    Genetic markers such as Single Nucleotide Polymorphisms (SNPs) can be used to find subgroups of populations or patients with carefully selected clustering algorithms. The iterative pruning principal component analysis (ipPCA) has been shown to be a powerful tool to identify fine substructures within general populations based on SNP profiles. Usually, SNPs contributing to such profiles have passed rigorous quality control procedures, similar to the ones used for GWAs. Alternatively, attention is restricted to a smaller subset such as PCA-correlated SNPs. Here, we applied ipPCA on real-life data consisting of the 163 known inflammatory-bowel disease (IBD) associated loci in 13,400 healthy...

  12. Iterative pruning method of unsupervised clustering for categorical data

    Chaichoompu, Kridsadakorn; Tongsima, Sissades; Shaw, Philip James; Sakuntabhai, Anavaj; Van Steen, Kristel
    Single Nucleotide Polymorphisms (SNPs) are commonly used to identify population structures. Iterative pruning Principal Component Analysis (ipPCA) utilizes SNP profiles to assign individuals to subpopulations without making assumptions about ancestry. The strategy can be extrapolated to patient samples to identify molecular classes of patients. It is challenging to investigate the utility of substructure detection using profiles based on pre-defined genomic regions-of-interest rather than profiles based on SNPs. Using principles outlined in Fouladi, 2015, we can construct gene-based categorical variables representing different summary gene profiles in a region. These gene-based new constructs no longer have an equal number of unordered category...

  13. Characterisation of mass-transfer and stability of the biofilm support in Three Phase Inverse Fluidised Bed (TPIFB).

    Dimitrov, D.; Guez, J.S.; Jacques, Philippe; Nikov, I.
    Peer reviewed

  14. An analysis of the effect of lipopeptides on oxygen transfer at high rates of foaming

    Martinov, M.; Gancel, F.; Jacques, Philippe; Nikov, I.; Vlaev, S.D.
    Peer reviewed

  15. Influence of the pH on the production of mycosubtilin, an antifungal metabolite from Bacillus subtilis with potential applications in agro-food sector

    Guez, J.S.; Leclere, V.; Bechet, M.; Joiris, H.; Jacques, Philippe
    Peer reviewed

  16. Optimisation strategies for antibiotic lipopeptide production by Bacillus subtilis

    Leclere, V.; Bechet, M.; Gancel, F.; Guez, J.S.; Imbert, M.; Jacques, Philippe
    Peer reviewed

  17. Combining genotype with allelic association as input for iterative pruning principal component analysis (ipPCA) to resolve population substructures

    Chaichoompu, Kridsadakorn; Fouladi, Ramouna; Wangkumhang, Pongsakorn; Wilantho, Alisa; Chareanchim, Wanwisa; Tongsima, Sissades; Sakuntabhai, Anavaj; Van Steen, Kristel
    Single Nucleotide Polymorphisms (SNPs) are commonly used to capture variations between populations and often genome-wide SNP data are pruned based on linkage disequilibrium (LD) patterns. Notably, haplotype composition and the pattern of LD between markers may vary between larger populations but may also play a role within more confined geographic regions. Indeed, knowledge about haplotypes in unrelated individuals can reveal useful information about genetic ancestry. Here, we use iterative pruning principal component analysis (ipPCA) [Intarapanich 2009] to identify and characterize subpopulations in an unsupervised way using a rich set of genetic markers since using reduced sets of genetic markers for...

  18. Stoechiometric modelling for physiological state changes monitoring in bioprocesses.

    Cassar, J.Ph.; Guez, J.S.; Jacques, Philippe
    Peer reviewed

  19. Multifacedted phenotype of a modified overproducing Bacillus subtilis strain

    Leclere, V.; Bechet, M.; Adam, A.; Wathelet, Bernard; Ongena, Marc; Thonart, Philippe; Gancel, F.; Chollet-Imbert, M.; Marti, R.; Jacques, Philippe
    Peer reviewed

  20. Optimisation de la production de biosurfactants par Bacillus subtilis

    Jacques, Philippe; Guez, M.; Destree, B.; Leclere, V.; Bechet, M.; Imbert, M.; Gancel, F.; Lecouturier, D.; Dhulster, P.; Nikov, I.
    Peer reviewed

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