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See detailPredictions of the reverberation time in high absorbent room using a modified-diffusion model
Billon, Alexis ULg; Picaut, Judicaël; Sakout, Anas

in Applied Acoustics (2008), 69(1), 68-74

A modification of the diffusion model’s boundary condition, based on the Eyring absorption coefficient, to account for high walls absorption is proposed. Numerical comparisons are carried out for three ... [more ▼]

A modification of the diffusion model’s boundary condition, based on the Eyring absorption coefficient, to account for high walls absorption is proposed. Numerical comparisons are carried out for three geometrical configurations (a proportionate room, a corridor and a flat enclosure). Comparisons with the statistical theory and a ray-tracing software show that the modified boundary condition increases the accuracy of the diffusion model in term of reverberation time in all the simulated configurations. An experimental comparison in the case of a non-uniformly absorbent room (a reverberation chamber covered with patches of glass wool) is also carried out. The modified-diffusion model results match well with the ray-tracing ones. Both models are in agreement with the experimental data for most of third octave bands (discrepancy close to or below 10%). However, some discrepancies up to 40% can also be observed in a few octave bands, probably due to experimental considerations and to the modal behaviour of the room at low frequencies. [less ▲]

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See detailWest Gondwanan and Euramerican climate impact on Famennian miospore assemblages
Streel, Maurice ULg

in Subcommission on Devonian Stratigraphy Newsletter (2008), 23

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See detailMaya blue-green pigments found in Calakmul, Mexico: a study by Raman and UV-visible spectroscopy
Moreno, Renata Garcia; Strivay, David ULg; Gilbert, Bernard ULg

in Journal Of Raman Spectroscopy (2008), 39(8), 1050-1056

After more than two decades of fieldwork in the Maya archaeological site of Calakmul, Mexico, numerous remnants of blue and green pigments have been reported on wall paintings, as well as on funerary ... [more ▼]

After more than two decades of fieldwork in the Maya archaeological site of Calakmul, Mexico, numerous remnants of blue and green pigments have been reported on wall paintings, as well as on funerary paraphernalia, such as masks, miniatures and vases. The importance of these pigments is linked to the sacred values that Maya people associate with blue and green colours since pre-Columbian times. These hues symbolise water, and are therefore associated with fertility and regeneration. This paper aims to perform a survey of the blue and green pigments used in the Early Classic and Late Classic periods in Calakmul (300-850 A.D.), in order to have a better understanding of their chemical composition and origin. Analyses were performed on microsamples using Raman and UV-visible spectroscopies to evaluate the possibilities that these techniques can offer in future in situ researches on Mesoamerican archaeological materials and objects. With these analyses, we have documented a large blue-green chromatic palette, which includes the earliest Blue Maya and Green Maya known to date, as well as malachite, pseudomalachite and an unknown-up-to-now blue-green mineral pigment, veszelyite, used specifically for ritual objects. The results indicate a careful selection of imported products and the mastering of a complex ancient Maya pictorial tradition. Copyright (c) 2008 John Wiley & Sons, Ltd. [less ▲]

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See detailDetection of glucocorticoid bioactivity in bovine urine samples using a reporter gene assay
Connolly, Lisa; Kai, C.; Van Der Heiden, Edwige ULg et al

in Proceedings of the Euroresidue VI Conference (2008)

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See detailMiddle energy PIXE preliminary experiments
Dupuis, Thomas ULg; Mathis, François ULg; Marchal, André ULg et al

Conference (2008)

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See detailCartographie du registre français de l'acromégalie
Petrossians, Patrick ULg; Morange-Ramos, I.; Delemer, B. et al

in Congrès de la Société Française d'Endocrinologie : Lille, 1-4 octobre 2008 (2008)

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See detaillocalized modulation of testosterone action: Function of steroid receptor coactivators in the brain
Charlier, Thierry ULg; Balthazart, Jacques ULg

in Ardis, L. I. (Ed.) New research on testosterone (2008)

Testosterone, through its activation of androgen and estrogen receptors, has been shown to play a critical role in brain development and physiology. Recent studies have shown that the activity of these ... [more ▼]

Testosterone, through its activation of androgen and estrogen receptors, has been shown to play a critical role in brain development and physiology. Recent studies have shown that the activity of these receptors can be modulated by the interaction with several proteins and, in particular, that coactivators are required to enhance their transcriptional activity. The steroid receptor coactivator-1, SRC-1 is the best-characterized coactivator and we review here the current knowledge on the distribution, regulation of expression and function of this protein in the brain, focusing mostly on our work in Japanese quail. As expected for a ubiquitous coactivator, SRC-1 is present throughout the brain in both mammalian and avian species but is found in particularly high concentrations in testosterone-sensitive areas such as the preoptic area in rat and Japanese quail and in the song control nuclei in songbirds. Further analysis demonstrates that the expression of SRC-1 is not constitutive but regulated in specific brain areas by the sex, acute stress and testosterone treatment. In addition, the protein concentration appears to fluctuate through the day in some brain regions. These modulations of SRC-1 expression by endogenous (sex) and exogenous (stress) factors could potentially exacerbate at specific times the competition or squelching between different nuclear receptors and therefore decrease the biological response induced by one or another hormonal system. Although the existence of such a phenomenon has not yet been demonstrated in a functionally intact biological system, the effects of SRC-1 antisense treatments clearly strengthen this hypothesis. Indeed, the decrease of SRC-1 expression in the hypothalamus induced by antisense oligonucleotide injections clearly inhibited both estrogen-dependent male sexual behavior and androgen-dependent pre- and post-copulatory displays (strut) in Japanese quail, therefore demonstrating a role of the coactivator in the transcriptional activation induced by both estrogen and androgen receptors. Interestingly, the inhibitory effect on sexual behavior of SRC-1 knock down was not systematically associated with modifications of several histological (definition of median preoptic nucleus [POM] using Nissl staining), immunohistochemical (aromatase and vasotocin cells and fibers in the POM) and biochemical (aromatase enzymatic activity) markers of testosterone action in the brain. This dissociation of the effects of SRC-1 on behavior on the one hand and on aromatase and POM neurochemistry on another hand suggests that other system(s) involved in the activation of male sexual behavior are likely more sensitive to a decrease of SRC-1 expression. In future research, it will be essential to determine the other cofactors involved in specific physiological responses and to define whether these coactivators act synergistically, in parallel or independently in the modulation of the activity of one or several nuclear receptors linked to a particular physiological event. In several biological models, the observed changes in concentration of the circulating hormone and /or its receptors are apparently not sufficient to explain the physiological and behavioral responses observed after testosterone treatment. The discovery of steroid receptor coactivators opens new perspectives in the study of the molecular basis of steroid action at the level of the organism and a complete understanding of the mechanisms of steroid action will not be achieved without a detailed characterization of nuclear receptor cofactors. [less ▲]

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See detailUn métier à tisser thérapeutique
Triffaux, Jean-Marc ULg; Gayetot, Delphine ULg; Izzi, Isabelle

in Revue des Hôpitaux de Jour Psychiatriques et des Thérapies Institutionnelles (2008), 10

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See detailFamille, sexualité et pouvoir dans "L’Ogre" de Jacques Chessex et "Le Jardin d’acclimatation" d’Yves Navarre
Sindaco, Sarah ULg

in Bouliane, Claudia; Popovic, Pierre (Eds.) La Ve République des Goncourt (2008)

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See detailIn Unordnung erstarrt
Schlagheck, Peter ULg; Richter, K.

Article for general public (2008)

Experimente mit kalten Atomen zeigen erstmals direkt die Anderson-Lokalisierung von Materiewellen.

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See detailPeinlichkeit und Imagination
Pontzen, Alexandra ULg

in Ziemer, Gesa; Zumsteg, Simon; Huber, Jörg (Eds.) Archipele des Imaginären (2008)

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See detailCooperative 2:1 Binding of a Bisphenothiazine to Duplex DNA
Rosu, Frédéric ULg; Gabelica, Valérie ULg; De Pauw, Edwin ULg et al

in Chembiochem : A European Journal of Chemical Biology (2008), 9

Highly cooperative formation of a 2:1 complex was revealed by electrospray mass spectrometry experiments, and a structural model is proposed.

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See detailPietätlose Rezeption? – Elfriede Jelineks Umgang mit der Tradition in „Die Kinder der Toten“.
Pontzen, Alexandra ULg

in Müller, Sabine; Theodorsen, Cathrin (Eds.) Elfriede Jelinek – Tradition, Politik und Zitat. (2008)

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See detailTunisian Table Olive Phenolic Compounds And Their Antioxidant Capacity
Ben Othman, N.; Weber, Dominique ULg; Thonart, Philippe ULg et al

in Journal of Food Science (2008), 73(4),

For the 1st time, 4 olive cultivars, theMeski, Chemlali, Besbessi, and Tounsi, fromthe Tunisian market were investigated to evaluate the phenolic compounds’ contribution in nutritional value of table ... [more ▼]

For the 1st time, 4 olive cultivars, theMeski, Chemlali, Besbessi, and Tounsi, fromthe Tunisian market were investigated to evaluate the phenolic compounds’ contribution in nutritional value of table olives. From the Meski cultivar, we have chosen 4 different samples to evaluate differences within the same cultivar. Basic characteristics and total phenolic content were evaluated in flesh and kernel. The highest value of flesh phenolic content was observed in sample M4 of the Meski cultivar; however, the lowest value was observed in the Besbessi cultivar and they were 1801 and 339 mg GA/100 g dry weight, respectively. Themain simple phenolic compounds identified in flesh extracts are hydroxytyrosol, tyrosol, and vanillic acid. Oleuropein was not detected in any samples. The antioxidant activity of Tunisian olive flesh varies between 212 and 462 μM TEAC/g of dry weight. Antioxidant activity of olives was related to their phenolic content but we found a low correlation between phenolic content and TEAC [less ▲]

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See detailCalculul Constructiilor Metalice la Actiunea Focului
Franssen, Jean-Marc ULg; Zaharia, Raul

Book published by Editura Orizonturi Universitare (2008)

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