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See detailAphids adapt their alarm pheromone production according to their social environment
Verheggen, François ULg; Haubruge, Eric ULg; Demoraes, Consuelo et al

Poster (2008)

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to ... [more ▼]

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to cease feeding, drop from their host plant, and disperse. Because aphid alarm pheromone confers apparent fitness benefits on recipients while its production and release likely entail costs for the emitting aphid, it could be adaptive for aphids to regulate their Eβf production in response to variation in the social environment. To explore this possibility we compared the production of Eβf by Acyrthosiphon pisum (Harris) individuals reared from first-instar larvae to the adult stage in isolation to that of individuals reared among conspecifics or among individuals of a different aphid species, Myzus persicae (Sulzer). Levels of EβF produced in each treatment were assayed by GC-FID quantification of EβF in volatiles collected from crushed aphids. Production of EβF by A. pisum reared in isolation (14.4ng/aphid) was significantly lower than that of aphids reared in a colony of conspecifics (49.1ng/aphid), reared in a M. persicae colony (31.5ng/aphid) or reared among conspecifics of another aaphid clone (52.7ng/aphid). Though A. pisum individuals in our experiments produced less EβF when reared among M. persicae than among conspecifics, this difference was not statistically significant. In a separate experiment we reared A. pisum individuals in isolation and exposed them to the odor of conspecifics. Under these conditions, EβF production was similar to that of aphids reared among conspecifics, suggesting that aphids use volatile cues to assess their social environment and regulate their production of alarm pheromone accordingly. [less ▲]

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See detailL'Aphrodite grecque : Contribution à l’étude de ses cultes et de sa personnalité dans le panthéon archaïque et classique
Pirenne-Delforge, Vinciane ULg

Book published by CIERGA (1994)

Survey of the Greek cults of the goddess Aphrodite and analysis of her place within the Greek pantheon.

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See detailAPI design for machine learning software: experiences from the scikit-learn project
Buitinck, Lars; Louppe, Gilles ULg; Blondel, Mathieu et al

Conference (2013, September 23)

scikit-learn is an increasingly popular machine learning library. Written in Python, it is designed to be simple and efficient, accessible to non-experts, and reusable in various contexts. In this paper ... [more ▼]

scikit-learn is an increasingly popular machine learning library. Written in Python, it is designed to be simple and efficient, accessible to non-experts, and reusable in various contexts. In this paper, we present and discuss our design choices for the application programming interface (API) of the project. In particular, we describe the simple and elegant interface shared by all learning and processing units in the library and then discuss its advantages in terms of composition and reusability. The paper also comments on implementation details specific to the Python ecosystem and analyzes obstacles faced by users and developers of the library. [less ▲]

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See detailAplicación de la ciencia para la evaluación medicinal del territorio y su desarrollo sostenible
Cascales - Miñana, Borja ULg; Sanahuja, Maria A.; Moreno, Lucrecia et al

Poster (2007, November)

Detailed reference viewed: 10 (1 ULg)
See detailAplicación del Cultivo de Tejidos en la Multiplicación y Conservación de los Recursos Fitogenéticos
Aguirre, Gino; Ugarte, Cecilia; Dancé Sifuentes, Eva et al

Book published by Universidad Mayor de San Simón (2010)

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See detailLa aplicación del cultivo de tejidos en la multiplicación y conservación de los Recursos Fitogenéticos
Baudoin, Jean-Pierre ULg

in Aguirre Villarroel, Gino; Baudoin, Jean-Pierre (Eds.) Aplicación del Cultivo de Tejidos en la Multiplicación y Conservación de los Recursos Fitogenéticos (2010)

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See detailApnée
Fredericq, Léon ULg

in Richet, Charles (Ed.) Dictionnaire de physiologie. 001. Tome I (1895)

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See detailAPOBEC3 Interference during Replication of Viral Genomes
Willems, Luc ULg; Gillet, Nicolas ULg

in Viruses (2015)

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See detailL'apocalisse incolore. Saggio su "Petrolio".
Fichera, Gabriele ULg

in Parol. Quaderni d'arte e d'epistemologia (2012), 22

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See detailApolipoprotein L-1 Promotes Trypanosome Lysis By Forming Pores In Lysosomal Membranes
Perez-Morga, David; Vanhollebeke, Benoit; Paturiaux-Hanocq, Françoise et al

in Science (2005), 309(5733), 469-72

Apolipoprotein L-I is the trypanolytic factor of human serum. Here we show that this protein contains a membrane pore-forming domain functionally similar to that of bacterial colicins, flanked by a ... [more ▼]

Apolipoprotein L-I is the trypanolytic factor of human serum. Here we show that this protein contains a membrane pore-forming domain functionally similar to that of bacterial colicins, flanked by a membrane-addressing domain. In lipid bilayer membranes, apolipoprotein L-I formed anion channels. In Trypanosoma brucei, apolipoprotein L-I was targeted to the lysosomal membrane and triggered depolarization of this membrane, continuous influx of chloride, and subsequent osmotic swelling of the lysosome until the trypanosome lysed. [less ▲]

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See detailApolipoprotein L-I is the trypanosome lytic factor of human serum.
Vanhamme, Luc; Paturiaux-Hanocq, Francoise; Poelvoorde, Philippe et al

in Nature (2003), 422(6927), 83-7

Human sleeping sickness in east Africa is caused by the parasite Trypanosoma brucei rhodesiense. The basis of this pathology is the resistance of these parasites to lysis by normal human serum (NHS ... [more ▼]

Human sleeping sickness in east Africa is caused by the parasite Trypanosoma brucei rhodesiense. The basis of this pathology is the resistance of these parasites to lysis by normal human serum (NHS). Resistance to NHS is conferred by a gene that encodes a truncated form of the variant surface glycoprotein termed serum resistance associated protein (SRA). We show that SRA is a lysosomal protein, and that the amino-terminal alpha-helix of SRA is responsible for resistance to NHS. This domain interacts strongly with a carboxy-terminal alpha-helix of the human-specific serum protein apolipoprotein L-I (apoL-I). Depleting NHS of apoL-I, by incubation with SRA or anti-apoL-I, led to the complete loss of trypanolytic activity. Addition of native or recombinant apoL-I either to apoL-I-depleted NHS or to fetal calf serum induced lysis of NHS-sensitive, but not NHS-resistant, trypanosomes. Confocal microscopy demonstrated that apoL-I is taken up through the endocytic pathway into the lysosome. We propose that apoL-I is the trypanosome lytic factor of NHS, and that SRA confers resistance to lysis by interaction with apoL-I in the lysosome. [less ▲]

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See detailApolipoprotein(a) genetic sequence variants associated with systemic atherosclerosis and coronary atherosclerotic burden but not with venous thromboembolism.
Helgadottir, Anna; Gretarsdottir, Solveig; Thorleifsson, Gudmar et al

in Journal of the American College of Cardiology (2012), 60(8), 722-9

OBJECTIVES: The purpose of this study is investigate the effects of variants in the apolipoprotein(a) gene (LPA) on vascular diseases with different atherosclerotic and thrombotic components. BACKGROUND ... [more ▼]

OBJECTIVES: The purpose of this study is investigate the effects of variants in the apolipoprotein(a) gene (LPA) on vascular diseases with different atherosclerotic and thrombotic components. BACKGROUND: It is unclear whether the LPA variants rs10455872 and rs3798220, which correlate with lipoprotein(a) levels and coronary artery disease (CAD), confer susceptibility predominantly via atherosclerosis or thrombosis. METHODS: The 2 LPA variants were combined and examined as LPA scores for the association with ischemic stroke (and TOAST [Trial of Org 10172 in Acute Stroke Treatment] subtypes) (effective sample size [n(e)] = 9,396); peripheral arterial disease (n(e) = 5,215); abdominal aortic aneurysm (n(e) = 4,572); venous thromboembolism (n(e) = 4,607); intracranial aneurysm (n(e) = 1,328); CAD (n(e) = 12,716), carotid intima-media thickness (n = 3,714), and angiographic CAD severity (n = 5,588). RESULTS: LPA score was associated with ischemic stroke subtype large artery atherosclerosis (odds ratio [OR]: 1.27; p = 6.7 x 10(-4)), peripheral artery disease (OR: 1.47; p = 2.9 x 10(-14)), and abdominal aortic aneurysm (OR: 1.23; p = 6.0 x 10(-5)), but not with the ischemic stroke subtypes cardioembolism (OR: 1.03; p = 0.69) or small vessel disease (OR: 1.06; p = 0.52). Although the LPA variants were not associated with carotid intima-media thickness, they were associated with the number of obstructed coronary vessels (p = 4.8 x 10(-12)). Furthermore, CAD cases carrying LPA risk variants had increased susceptibility to atherosclerotic manifestations outside of the coronary tree (OR: 1.26; p = 0.0010) and had earlier onset of CAD (-1.58 years/allele; p = 8.2 x 10(-8)) than CAD cases not carrying the risk variants. There was no association of LPA score with venous thromboembolism (OR: 0.97; p = 0.63) or intracranial aneurysm (OR: 0.85; p = 0.15). CONCLUSIONS: LPA sequence variants were associated with atherosclerotic burden, but not with primarily thrombotic phenotypes. [less ▲]

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See detailApollinaire et la rime (deuxième partie)
Purnelle, Gérald ULg

in Apollinaire (2013), 13

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See detailApollinaire et la rime (première partie)
Purnelle, Gérald ULg

in Apollinaire (2012), 12

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See detailApollinaire et le théâtre. Actes du XXIIIe colloque international de Stavelot. 5 et 6 septembre 2014
Delbreil, Daniel; Purnelle, Gérald ULg

Book published by Calliopées (2016)

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See detailApollinaire poète en prose
Delbreil, Daniel; Purnelle, Gérald ULg

Book published by Calliopées (2014)

Au début du 20e siècle, la poésie éprouve la tentation de la prose : nombre de poètes, lassés par des formes qu'ils jugent épuisées ou obsolètes, cherchent des voies nouvelles hors des vers et se font ... [more ▼]

Au début du 20e siècle, la poésie éprouve la tentation de la prose : nombre de poètes, lassés par des formes qu'ils jugent épuisées ou obsolètes, cherchent des voies nouvelles hors des vers et se font prosateurs. Apollinaire est de ceux-là. Les études réunies ici s'attachent à montrer de quelle façon il nous invite à admettre que la poésie trouve aussi bien sa place entre vers et prose que dans des formes scripturales et graphiques nouvelles, d'une hybridité déroutante (ni pleinement prose, ni pleinement vers, ou mi-prose, mi-vers) ou encore s'inscrit, comme le calligramme, dans la dimension spatiale. Apollinaire, poète en prose et inventeur de formes, apparaît ainsi comme étant toujours en quête d'un langage et d'un lyrisme neufs jusqu'à perdre le vers : "Perdre Mais perdre vraiment Pour laisser place à la trouvaille". [less ▲]

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See detailApollo 13. Jos de Haes en het reële van zijn verlangen
Spinoy, Erik ULg

in De Haes, Jos (Ed.) Gedichten (2004)

This is a rereading of the poetry of the Flemish poet Jos de Haes, the author of a limited body of work which, notwithstanding, had great influence in postwar Flemish poetry.

Detailed reference viewed: 56 (0 ULg)
See detailApollo op vrijersvoeten. een onderzoek naar de thematische coherentie in de Verzamelde verhalen van Simon Vestdijk
Nachtergaele, Lutgarde ULg

Book published by Editions Peeters (1996)

study of the thematical coherence in the short stories written by Simon Vestdijk (1898-1971)

Detailed reference viewed: 20 (3 ULg)