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See detailCopper toxicity on coral holobiont photosynthetic processes
Georges, Nadège; Richir, Jonathan ULg; Batigny, Antoine et al

Poster (2016, December 16)

Copper (Cu), an essential micronutrient to organisms, may become toxic when present at too high environmental concentrations. This metal remains an aquatic contaminant of concern, notably because of its ... [more ▼]

Copper (Cu), an essential micronutrient to organisms, may become toxic when present at too high environmental concentrations. This metal remains an aquatic contaminant of concern, notably because of its recent re-use as biocide in metal-based antifouling paints. The aim of this study was to monitor the physiological alterations in a zooxanthellate coral species and its endosymbionts (i.e. the coral holobiont) exposed to increasing Cu concentrations. Nubbins of Seriatopora hystrix were exposed for 8 days in 1 L intermittent respirometers to 5 nominal Cu concentrations: 0-2-5-15-50 ppb. Respirometers were maintained at 25.0±0.2°C with successive open/close cycles of 30 min. A 12/12 hours day-night light regime was applied with constant daylight intensity of 200 μmol photons m-2 s-1. Water renewal rate during the 30 min open cycles was 15 mL.min-1. The photosynthetic performances of coral endosymbionts were assessed daily with a fluorescence imaging system (imaging-PAM). At the end of the 8-days experiment, the maximal photochemical quantum yield (FV/FM) of coral nubbins had decreased by 12% and 38%, respectively, in the 15 ppb and 50 ppb treatments. This decrease was even greater for the effective photochemical quantum yield (ɸPSII) with values dropping by 41% and 54%, respectively. Cu exposure also affected the symbiosis between the coral host and its endosymbionts. Nubbins of the 15 ppb treatment slightly lightened from day 6, whilst nubbins exposed to the 50 ppb treatment lightened from day 3, and started to bleach from day 6. The analysis of nubbins’ primary productivity did not coincide with the above observations, the oxygen production within each respirometer remaining relatively constant during the overall experiment for all treatments. This unexpected observation may be the sign of a compensation mechanism. In conclusion, Cu affected the photosynthetic processes of S. histrix within 8 days from relevant environmental concentrations of 15 ppb. The exposure of corals to toxic chemicals thus has to be considered as an additional stressor to, e.g., ocean acidification or elevated temperature, which may disturb their ecophysiology and lead to bleaching. [less ▲]

Detailed reference viewed: 28 (1 ULg)
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See detailCopper whisker growth from inside sulfur-doped YBa2Cu307-X pellets
Cloots, Rudi ULg; Krekels, T.; Warin, R. et al

in Journal of Solid State Chemistry (1995), 117(1), 151-156

We report on the growth of Cu whiskers (10 mu m in linear transverse size) at the surface of a YBCO pellet, in a sulfur-rich atmosphere at a high synthesis temperature. Growth arises from inside the ... [more ▼]

We report on the growth of Cu whiskers (10 mu m in linear transverse size) at the surface of a YBCO pellet, in a sulfur-rich atmosphere at a high synthesis temperature. Growth arises from inside the pellet since there is no Cu in the surrounding atmosphere. We present the experimental conditions and electron microscopic observations. We briefly propose a mechanism based on chemical considerations, in particular, a Cu reductive nucleation of the CuS phase at the surface of YBCO. Natural phenomena, laboratory findings, and computer simulation work (based on an Eden model) support this interpretation. [less ▲]

Detailed reference viewed: 35 (0 ULg)
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See detailCopper-Cobalt Flora of Upper Katanga and Copperbelt : Field Guide
Malaisse, François ULg; Schaijes, Michel; D’Outreligne, Claire

Book published by Presses agronomiques de Gembloux (2016)

The copper-cobalt outcrops of Upper Katanga and north-western Zambia host a particular flora which comprises an estimated 750 species of which more than 400 are treated in this copper-cobalt field guide ... [more ▼]

The copper-cobalt outcrops of Upper Katanga and north-western Zambia host a particular flora which comprises an estimated 750 species of which more than 400 are treated in this copper-cobalt field guide. The aim of this book, resulting from several years of intensive field work and study, is to bring together the basic knowledges permitting an easy approach to the identification of a great number of the species to be encountered. More than 400 species are illustrated with color photographs and/or drawings together with comments concerning synonyms, habit, description, ecology and distribution. Plant species are listed and colour-coded according to classification: Cyanoprocaryota, lichenized Fungi, Anthocerophyta, Marchantiophyta and Bryophyta (red edge), Lycophyta and Monilophyta (green edge), Magnoliopsida (blue edge) and Liliopsida (yellow edge). An index allows easy location either according to genus and species. An account of the research on copper-cobalt ecosystems carried out during the last ten years in southeastern D.R. Congo is also presented. The editors have spent more than twenty years in the area concerned and have collected more than 8,500 voucher specimens, including eleven species new to science (holotypes). [less ▲]

Detailed reference viewed: 418 (53 ULg)
See detailCopper-Cobalt Flora Report, Oxide Project Tenke Fungurume Mining,
Lebrun, Julie ULg; Seleck, Maxime ULg; Ilunga wa Ilunga, Edouard et al

Report (2012)

Baseline study, impact assessment and management measures for copper-cobalt habitat

Detailed reference viewed: 56 (3 ULg)
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See detailCopperflora – an online species-level database of biology, ecology, geography of the flora from the Katangan Copperbelt (D.R. Congo) to manage their conservation
Boisson, Sylvain ULg; Seleck, Maxime ULg; Le Stradic, Soizig ULg et al

Poster (2015, May 21)

Storage and accessibility to structured data are essential in all fields of scientific research. In ecology, conservation managers regularly use thousands qualitative and quantitative data from different ... [more ▼]

Storage and accessibility to structured data are essential in all fields of scientific research. In ecology, conservation managers regularly use thousands qualitative and quantitative data from different partners and studies. In recent years, online databases concerning climate, species traits and distribution have been developed but few offer a comprehensive tool for the management of species conservation at several steps. The Copperflora database was created in order to include a diversity of informations about species (taxonomy, habitats, phenology, pictures, distribution, etc.) but also information concerning seeds collection, conservation, monitoring and tests applied to target species. Copperflora is meant to be an interactive and a dynamic project enhancing the exchange of data. Our project also contributes to the advance in the understanding of metallophyte communities’ conservation and restoration projects. Our database structure is expected to be easily transferable to other conservation actions. [less ▲]

Detailed reference viewed: 39 (8 ULg)
See detailCopperflora.org - website
Boisson, Sylvain ULg; Seleck, Maxime ULg; Le Stradic, Soizig ULg et al

Textual, factual or bibliographical database (2012)

This website is intended as a place of exchange for scientists and mine managers interested in the conservation, the restoration and the taxonomy of the copper-cobalt flora.

Detailed reference viewed: 72 (17 ULg)
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See detailCoproduction of fengycin and iturin, surfactn or mycosubtilin lipopeptides from Bacillus subtilis
Hbid, C.; Jacques, Philippe ULg; Razafindralambo, Hary ULg et al

in Archives of Physiology & Biochemistry (1995, March 11), 103

Detailed reference viewed: 21 (5 ULg)
Peer Reviewed
See detailCoproperty and construction of dwellings
Kohl, Benoît ULg

Conference (2012)

Detailed reference viewed: 5 (0 ULg)
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See detailLa copropriété d'immeubles ou de groupe d'immeubles bâtis : un tour d'horizon de la réforme
Salvé, Arianne ULg

in Tijdschrift voor Appartements- en Immorecht = Revue Copropriété et Droit Immobilier (2009), (4), 8-16

La Chambre des représentants a donné son feu vert à la modification des dispositions légales relatives à la copropriété (d’immeubles ou de groupes d’immeubles bâtis). La Commission Justice de la Chambre a ... [more ▼]

La Chambre des représentants a donné son feu vert à la modification des dispositions légales relatives à la copropriété (d’immeubles ou de groupes d’immeubles bâtis). La Commission Justice de la Chambre a eu à cœur de simplifier et d’accroître la transparence dans la gestion des copropriétés par rapport au prescrit légal de la loi du 30 juin 1994. Entre-temps, le Sénat a utilisé son droit d’évocation du projet de loi voté à la Chambre. Un sommaire du projet de réforme. (Lge 25/11/2009) [less ▲]

Detailed reference viewed: 100 (22 ULg)
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See detailLa copropriété d'immeubles ou de groupe d'immeubles bâtis : un tour d'horizon de la réforme
Salvé, Arianne ULg

in Revue de la Faculté de Droit de l'Université de Liège (2009), 2009/4

La Chambre des représentants a donné son feu vert à la modification des dispositions légales relatives à la copropriété (d’immeubles ou de groupes d’immeubles bâtis). La Commission Justice de la Chambre a ... [more ▼]

La Chambre des représentants a donné son feu vert à la modification des dispositions légales relatives à la copropriété (d’immeubles ou de groupes d’immeubles bâtis). La Commission Justice de la Chambre a eu à cœur de simplifier et d’accroître la transparence dans la gestion des copropriétés par rapport au prescrit légal de la loi du 30 juin 1994. Entre-temps, le Sénat a utilisé son droit d’évocation du projet de loi voté à la Chambre. Un sommaire du projet de réforme. (Lge 25/11/2009) [less ▲]

Detailed reference viewed: 94 (18 ULg)
See detailCopropriété des immeubles et groupes d'immeubles bâtis
Hansenne, Jacques; Hallet, Georges; Martiny, Joseph et al

in Chroniques de droit à l'usage du notariat (1996, October)

Detailed reference viewed: 36 (7 ULg)
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See detailCopropriété et arbitrage
Caprasse, Olivier ULg

in Revue Générale de Droit Civil Belge = Tijdschrift voor Belgisch Burgerlijk (2005)

Detailed reference viewed: 53 (7 ULg)
See detailCopropriété et loi Breyne
Lecocq, Pascale ULg

Scientific conference (2000)

Detailed reference viewed: 4 (0 ULg)
See detailCopropriété et loi Breyne
Lecocq, Pascale ULg

Scientific conference (2000)

Detailed reference viewed: 31 (3 ULg)
See detailCopropriété et servitude
Boufflette, Sophie ULg

Scientific conference (2012, March 10)

Detailed reference viewed: 40 (6 ULg)
See detailCopropriété et servitudes
Lecocq, Pascale ULg

Scientific conference (2003)

Detailed reference viewed: 6 (0 ULg)
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See detailCopropriété et voisinage
Lecocq, Pascale ULg; Boufflette, Sophie ULg

in Lecocq, Pascale; Dambre, Maarten (Eds.) Chronique de droit à l'usage des juges de paix et de police 2012 (2012)

Detailed reference viewed: 109 (26 ULg)
See detailCopropriété forcée d'immeubles ou groupes d'immeubles bâtis
Lecocq, Pascale ULg

Conference given outside the academic context (2004)

Detailed reference viewed: 13 (4 ULg)