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See detailAspidothelium hirsutum (Thelenellaceae) and Caprettia goderei (Monoblastiaceae), two new species of foliicolous lichens from Ethiopia and Kenya
Yeshitela, Kumelachew; Fischer, Eberhard; Killmann, Dorothee et al

in Bryologist (2009), 112

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See detailSilicon exercises influence on nitrogen compounds in pepper subjected to water deficit
Lobato, AKS; Luz, LM; Costa, RCL et al

in Research Journal of Biological Sciences (2009), 4(9), 1048-1055

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See detailThe cognitive effects of anxiety on sexual arousal
Kempeneers, Philippe ULg; Pallincourt, Romain; Blairy, Sylvie ULg

in Weingarten, S.P.; Penat, H.O (Eds.) Cognitive psychology research developments (2009)

Anxiety and sexual arousal have often been considered as incompatible. Since the end of the 20th Century, however, researches have impaired theories centred on the inhibitory effect of the stress and on ... [more ▼]

Anxiety and sexual arousal have often been considered as incompatible. Since the end of the 20th Century, however, researches have impaired theories centred on the inhibitory effect of the stress and on peripheral explanations; they rather focus attention on the complexity of the relations between the two states and on cognitive mechanisms. <br />Now sexual arousal tends to be regarded as a complex response that requires the convergent interpretation of internal and external stimuli. Anxiety may have different effects on this process, sometimes neutral, sometimes facilitating and sometimes inhibitory. <br />On the one hand, anxiety can trigger a vegetative emotional reaction that may be associated to a concomitant erotic stimulation. Thus, anxiety facilitates the sexual response: this can be called a priming effect. This effect is regularly observed in labs, mainly among women. It likely also works in certain compulsive sexual behaviours or, more commonly, in those numerous persons that report being sexually aroused when stressed. <br />On the other hand, anxiety can cause a massive irruption of non erotic cues in working memory. Therefore, cognitive function available for treating erotic stimuli is diminished and sexual response is impaired. This is an effect of cognitive interference. A trait called erotophobia could be regarded as a vulnerability factor to cognitive interference. Erotophobic subjects are characterized by a trend to focus upon danger-related information when they are in a sexual situation and by a higher risk of sexual dysfunction. [less ▲]

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See detailProblèmes de dénombrement et émergence de premiers modèles fonctionnels
Krysinska; Mercier; Schneider-Gilot, Marguerite ULg

in Recherches en Didactique des Mathématiques (2009), 29/3

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See detailAnalyse des transferts couplés de chaleur et de masse pendant le séchage des figues
Khama, Réda; Belhamri, Azeddine; Bennamoun, Lyes ULg

in Revue Algérienne de Physique (2009)

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See detailDe nouvelles problématiques pour la Géographie de l’agriculture
Merenne-Schoumaker, Bernadette ULg

in Acta Geographica Lovaniensia (2009), 38

Researches currently lead by experts of agriculture can be brought together in three fields: the globalization of agriculture and food and their impacts on food-processing systems, feeding the planet ... [more ▼]

Researches currently lead by experts of agriculture can be brought together in three fields: the globalization of agriculture and food and their impacts on food-processing systems, feeding the planet tomorrow and developing an agriculture which could face climatic, energetic and environmental stakes. Those three problematics cannot leave geographers cold, especially since those three fields show strong regional variations. So everything speaks in favour of geographers’ reinvestment in the field of agriculture’s geography, which has been widely neglected these last years. [less ▲]

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See detailNourrir les hommes aujourd’hui et demain
Merenne-Schoumaker, Bernadette ULg

in G.E.O. (2009), (65), 9-23

La crise alimentaire de 2007-2008 a rappelé à tous que le problème de la faim était loin d'être résolu. L'objectif de cet article, destiné en premier lieu aux enseignants du secondaire, est de tenter d ... [more ▼]

La crise alimentaire de 2007-2008 a rappelé à tous que le problème de la faim était loin d'être résolu. L'objectif de cet article, destiné en premier lieu aux enseignants du secondaire, est de tenter d'évoquer les spécificités de cette crise alimentaire, de leur donner ensuite quelques clés pour comprendre les problèmes et les enjeux et enfin de s'interroger sur les futurs possibles en 2050. [less ▲]

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See detailLocal-Level Monitoring in Decentralized Forest Management: Exploring the Spaces for Community Participation
Tol, Sokchea; Srey, Marona; Diepart, Jean-Christophe ULg

in Beaupre, Pauline; Taylor, Janet; Carson, Toby (Eds.) Emerging Trends, Challenges and Innovations Community Based Natural Resource Management (CBNRM) in Cambodia (2009)

This paper explores a participatory monitoring process initiated in Kampong Thom province with 3 Community Forestry (CF) sites where CF development was facilitated by Forestry Administration (FA) staff ... [more ▼]

This paper explores a participatory monitoring process initiated in Kampong Thom province with 3 Community Forestry (CF) sites where CF development was facilitated by Forestry Administration (FA) staff and externally supported by German Technical Support-Rural Development Programme (GTZ-RDP).The paper details the methodology used and the key outputs produced during the process, it highlights the four main principles of the principle, criteria, and indicator Monitoring and Evaluation (M&E) which are: (1) that forest health is maintained, (2) public well-being is improved, (3) community well-being is assured, and (4) external support is effective. The results show that in all three CF, the land integrity and the forest resource itself was improved between the baseline and follow-up surveys. Despite the positive results, many of the challenges and limitations were acknowledged including the difficulty in capturing all different points of view and opinions when there are such a large number of people involved and consulted as well as how this can lead to a slowdown within the whole process and is very expensive. The paper concludes suggesting that a local level monitoring system can help to build local capacity, improve decision-making, reduce conflict between local forest dependents and responsible authorities as well as empower local community members, especially marginalized groups. [less ▲]

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See detailContribution to the study of semiochemical slow release formulations. Development of flash chromatographic methods.
Heuskin, Stéphanie ULg; Farmakidis, Julien; Lorge, Stéphanie et al

Poster (2009)

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See detailBounds for Multistage Stochastic Programs using Supervised Learning Strategies
Defourny, Boris ULg; Ernst, Damien ULg; Wehenkel, Louis ULg

in Watanabe, Osamu; Zeugmann, Thomas (Eds.) Stochastic Algorithms: Foundations and Applications (2009)

We propose a generic method for obtaining quickly good upper bounds on the minimal value of a multistage stochastic program. The method is based on the simulation of a feasible decision policy ... [more ▼]

We propose a generic method for obtaining quickly good upper bounds on the minimal value of a multistage stochastic program. The method is based on the simulation of a feasible decision policy, synthesized by a strategy relying on any scenario tree approximation from stochastic programming and on supervised learning techniques from machine learning. [less ▲]

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See detailSuole di vento. Jean Rouch fra antropologia e cinema
Jedlowski, Alessandro ULg

in Achab : Rivista di Antropologia (2009), XIV

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See detailText and Hypertext. Function, Reading, Learning
Defays, Jean-Marc ULg

in Belgian Journal of Linguistics (2009), 23

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See detailEvaluation of the contamination of North Sea Porpoises (Phocoena phocoena) by endocrine disrupting chemicals using CG-MS and in vitro assays
Didimo Imazaki, Pedro Henrique ULg; Brose, François ULg; Remacle, Anne-Sophie ULg et al

Poster (2009)

During the last decades, the production of endocrine disrupting chemicals reached such elevated levels that they are now spread all over the environment. Endocrine disrupting chemicals are known to be ... [more ▼]

During the last decades, the production of endocrine disrupting chemicals reached such elevated levels that they are now spread all over the environment. Endocrine disrupting chemicals are known to be very slowly degraded, decreasing the environmental quality and causing ecological risks. Marine mammals inhabiting polluted environments accumulate high quantities of these chemicals, and are good indicators of marine pollution Thirteen major organochloride pollutants (known from literature to contaminate north sea porpoise) were chosen in this study – o,p’-DDD; p,p’-DDD; p,p’-DDE; o,p’-DDT; p,p’-DDT; HCB; α-HCH; β-HCH; γ-HCH; δ-HCH; PCB 138; PCB 153 and PCB 180. The thirteen chemicals were tested individually and in mixtures by the use of report gene expression assays. The MCF7-ERE cells used in the assays were originated from MCF7 human mammary tumor cells transfected with the ERE-luciferase reporter system. Preliminary results suggest that o,p’-DDD; p,p’-DDD; o,p’-DDT; HCB; β-HCH; δ-HCH; PCB 138 and PCB 180 are able to stimulate the luciferase expression of MCF7-ERE cells when they are present individually or in mixtures. No synergism was observed within mixtures. When MCF7-ERE cells were exposed to the chemicals and 17β-oestradiol simultaneously, p,p’-DDE; α-HCH; PCB 138 and PCB 180 could raise the luciferase expression in comparison to the exposition of 17β-oestradiol alone; on the other hand, o,p’-DDD; p,p’-DDT; HCB; β-HCH; γ-HCH and δ-HCH seem to inhibit the luciferase expression at low doses. In the next step, the pollutants will be searched and quantified in the blubber tissue of porpoises by use of gas chromatography-mass spectrometry. The blubber tissue samples will also have their endocrine disrupting effects characterized. This work is ongoing and It is expected a relevant level of these compounds to be found in the samples. Conversely, their endocrine disrupting effects and how they act in agonist, antagonist ways are subject that still needs to be studied. [less ▲]

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See detailContamination du marsouin commun (Phocoena phocoena) de la Mer du Nord par des perturbateurs endocriniens persistants
Didimo Imazaki, Pedro Henrique ULg

Master's dissertation (2009)

Endocrine disrupters are molecules able to interfere with the endocrine system and are largely spread in the environment. The evaluation of the estrogenic activity of some of these substances by reporter ... [more ▼]

Endocrine disrupters are molecules able to interfere with the endocrine system and are largely spread in the environment. The evaluation of the estrogenic activity of some of these substances by reporter gene assays was the first aim of this paper. The substances chosen are also persistent organic pollutants (POP), which are capable to bioaccumulate in several organisms. Then, the occurrence of these substances was evaluated in the blubber tissue of North Sea harbour porpoises (Phocoena phocoena). Harbour porpoises are good indicators of the environmental contamination and therefore of seafood by POP. These POP were quantified by GC-MS and also by reporter gene assays. For the achievement of these aims, different analytical methods were developed. The following raking is proposed for the studied substances, according to their estrogenic activity: o,p’-DDT > o,p’-DDD > β-HCH > p,p’-DDT > p,p’-DDD > p,p’-DDE > δ-HCH > PCB 138 > γ-HCH > α-HCH > PCB 153 > HCB > PCB 180. None of them presented anti-estrogenic activity. The analysed samples presented high levels of POP, sometimes associated with estrogenic activity, confirming the occurrence of endocrine disruptors in these animals. [less ▲]

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See detailEvaluation of the endorcine disrupting chemicals contamination in the North Sea porpoise population using in vitro assays
Didimo Imazaki, Pedro Henrique ULg; Brose, François ULg; Van Der Heiden, Edwige ULg et al

Poster (2009)

During the last decades, the production endocrine disrupting chemicals reached such levels that they are now spread all over nature. They are known to be very slowly degraded, decreasing the environmental ... [more ▼]

During the last decades, the production endocrine disrupting chemicals reached such levels that they are now spread all over nature. They are known to be very slowly degraded, decreasing the environmental quality and posing ecological risks. Marine mammals inhabiting polluted environments accumulate high levels of these chemicals, so they can be considered good indicators of marine pollution. Thirteen major organochloride pollutants were chosen to make subject of this study: o,p’-DDD; p,p’-DDD; p,p’-DDE; o,p’-DDT; p,p’-DDT; HCB; α-HCH; β-HCH; γ-HCH; δ-HCH; PCB 138; PCB 153 and PCB 180. All these chemicals will have their endocrine disrupting effects characterized individually and collectively by report gene expression assays. The MCF7-ERE cells used in these assays were produced in the Molecular Biology and Genetic Engineering Laboratory of the University of Liège and are originated from a human mammary carcinoma. They carry a gene expressing the synthesis of luciferase and controlled by oestrogen receptors. Then, the thirteen chemicals will be searched in the blubber tissues of porpoises by the use of gas chromatography-mass spectrometry. The blubber samples will also have their endocrine disrupting effect characterized. For the moment, the estrogenic effects of the HCH isomers were put in evidence. The next steps of this work must be soon accomplished. It is expected a great level of these compounds to be found in the samples. On the other hand, their endocrine disrupting effects and how they act in agonist, antagonist and synergist ways are subject that still needs to be cleared. [less ▲]

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See detailRésolution du problème de contact mécanique frottant : méthode du lagrangien augmenté adapté
Bussetta, Philippe ULg; Marceau, Daniel; Ponthot, Jean-Philippe ULg

in Proceedings of “9ème Colloque National en Calcul des Structures (2009)

Cet article présente une nouvelle méthode de résolution du problème de contact mécanique frottant, celle du lagrangien augmenté adapté. Contrairement aux méthodes les plus utilisées (pénalisation et ... [more ▼]

Cet article présente une nouvelle méthode de résolution du problème de contact mécanique frottant, celle du lagrangien augmenté adapté. Contrairement aux méthodes les plus utilisées (pénalisation et lagrangien augmenté), l’utilisateur ne doit pas déterminer les valeurs des coefficients de pénalisation. Cette méthode est performante aussi bien avec des matériaux élastiques qu’élasto-plastiques. Le problème de Hertz est présenté. Cette méthode est au si utilisée dans le contexte multi-physique. [less ▲]

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See detailUsing Artificial Vision for the Microscopic Identification of Ores with Reflected Light: Preliminary Results.
Castroviejo, Ricardo; Brea, Carolina; Perez-Barnuevo, Laura et al

in Proceedings 10th Biennial SGA Meeting (2009)

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See detailHolocene environmental changes in lake sediments from Northern Chilean Patagonia
Nuttin; Fagel, Nathalie ULg; Brogniet et al

Poster (2009)

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