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See detailPhellinus caribaeo-quercicolus sp. nov., parasitic on Quercus cubana: taxonomy and preliminary phylogenetic relationships.
Decock, Cony; Herrera Figueroa, Sara; Robledo, Gerardo et al

in Mycologia (2006), 98(2), 265-74

Phellinus caribaeo-quercicolus sp. nov. is described from several collections made in western Cuba, so far exclusively on Quercus cubana. The species is characterized by a perennial, resupinate basidiomes ... [more ▼]

Phellinus caribaeo-quercicolus sp. nov. is described from several collections made in western Cuba, so far exclusively on Quercus cubana. The species is characterized by a perennial, resupinate basidiomes, cushion-shaped to nodulose and multi-layered when old, apically hooked to hamate hymenial setae, and ellipsoid to broadly ellipsoid, thin- to thick-walled, hyaline to faintly yellowish basidiospores, 4.5-5.5 x 3.5-4.5 microm. The species is compared to other Phellinus species with hooked setae, especially Phellinus undulatus, also recorded in Cuba. The preliminary phylogenetic relationships of Ph. caribaeo-quercicolus within the poroid Hymenochaetales complex of genera is presented and discussed here. [less ▲]

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See detailSTRATEGY FOR THE QUALITATIVE AND QUANTITATIVE ANALYSIS OF CROP SYRUP CONTAINING ISOMALTOOLIGOSACCHARIDES KNOWN AS EMERGING PREBIOTICS
Goffin, Dorothée ULg

Conference (2006)

Isomaltooligosaccharides (IMOs) are non-digestible oligosaccharides, considered as prebiotics and therefore aim to selectively feed probiotics indigenous to the human colon. Recent data obtained in human ... [more ▼]

Isomaltooligosaccharides (IMOs) are non-digestible oligosaccharides, considered as prebiotics and therefore aim to selectively feed probiotics indigenous to the human colon. Recent data obtained in human subjects, support the involvement of dietary oligosaccharides in physiological processes in the different intestinal cell type and also outside the gastrointestinal tract (e.g. hormone production, lipid and carbohydrate metabolism). IMOs consists of glucose monomers linked by at least one α-1-6, or in a lower proportion α -1-3 (nigerose family) or α -1-2 (kojibiose family) glucosidic linkages. In our case they are produced enzymatically from corn starch. It results in a very complex mixture with molecules characterized at the same time by their DP value (from 2 to ~20), linkages types (α-1-2, 3 or 6) and the proportion and position of each type of linkage (only α -1-6 or combined types). The challenge of this study was to find a qualitative and quantitative method to characterize the syrups. In a subsequent study, every unidentified peak could be determined by NMR or Mass spectrometry. Three different chromatographic methods have been tested and compared over their selectivity, sensibility, robustness, applicability and their quantitative power. The HPLC-RID (Refractive Index Detector) used with a Prevail Carbohydrate column (Alltech), adapted for carbohydrates with a certain value of DP, appear to be poorly selective due to the obligation of working in isocratic conditions. The HPLC-ELSD (Evaporating Light Scattering Detector) used with the same column gave a very good separation upon the DP as the Prevail accepts a wide range of solvant changing and even a separation of the different DP 2 molecules. The sensibility was also improved due to the stability of the baseline. The quantitative analysis is a bit more awkward due to the relatively limited linear portion of the calibration curve. High-performance Anion Exchange Chromatography coupled with Pulsed Amperometric Detection (HPAEC-PAD) appeared to deserve a special mention, since it provides selective separation and sensitive detection. In fact, this technique is the only chromatographic one to separate with effectiveness homologue molecules having a difference only in their DP (up to high DPs) or linkage types. This is due to the separation mode based on the difference in ionic force of the sugars in alkaline conditions (mainly due to the DP and the structure of the molecule). However, during the detection, the electrochemical behavior of carbohydrates can be affected by molecular weight as well as by structural differences giving rise to different response factors; as a consequence, HPAEC-PAD is not generally considered as suitable for quantitative studies of complex mixtures of oligosaccharides. In this work a methodological approach is presented in order to get a quantitative response through a rigorous methodology for our IMOs. It also opens the way to the theoretical determination of the response factor for the homologue molecules in relation with their structure and DP. [less ▲]

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See detailHarmonisation des strategies de validation et estimation de l'incertitude associee dans le cadre de l'accreditation des laboratoires d'essais
Hubert, Philippe ULg; Rozet, Eric ULg; Boulanger, Bruno ULg et al

in Acta Clinica Belgica. Supplementum (2006), S1(1), 53-55

In order to achieve the harmonization of validation strategies, the interpretation of several validation criteria is proposed. Furthermore, a simple and visual decision tool to assess the validity of an ... [more ▼]

In order to achieve the harmonization of validation strategies, the interpretation of several validation criteria is proposed. Furthermore, a simple and visual decision tool to assess the validity of an analytical procedure is described: the accuracy profile based on the estimation of the total error of the measurements. This profile build with beta-expectation tolerance intervals can also compute with efficiency the uncertainty related to the results of a laboratory, which is an essential parameter for the accreditation of laboratories under ISO 17025. [less ▲]

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See detailMicrobial ecology of the closed artificial ecosystem MELiSSA (Micro-Ecological Life Support System Alternative): Reinventing and compartmentalizing the Earth's food and oxygen regeneration system for long-haul space exploration missions
Hendrickx, Larissa; De Wever, Heleen; Hermans, Veronik et al

in Research in Microbiology (2006), 157

MELiSSA is a bioregenerative life support system designed by the European Space Agency (ESA) for the complete recycling of gas, liquid and solid wastes during long distance space exploration. The system ... [more ▼]

MELiSSA is a bioregenerative life support system designed by the European Space Agency (ESA) for the complete recycling of gas, liquid and solid wastes during long distance space exploration. The system uses the combined activity of different living organisms: microbial cultures in bioreactors, a plant compartment and a human crew. In this minireview, the development of a short-cut ecological system for the biotransformation of organic waste is discussed from a microorganism's perspective. The artificial ecological model—still in full development—that is inspired by Earth's own geomicrobiological ecosystem serves as an ideal study object on microbial ecology and will become an indispensable travel companion in manned space exploration. [less ▲]

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See detailIdentification of novel and recurrent glucokinase mutations in Belgian and Luxembourg maturity onset diabetes of the young patients.
Vits, L.; Beckers, D.; Craen, M. et al

in Clinical Genetics (2006), 70(4), 355-9

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See detailRadiographic and ultrasonographic findings of emphysematous cystitis in four nondiabetic female dogs
Petite, A.; Busoni, Valeria ULg; Heinen, Marie-Pierre ULg et al

in Veterinary Radiology & Ultrasound (2006), 47(1), 90-93

The urinary bladder of four dogs with emphysematous cystitis was assessed radiographically. Ultrasonography was also performed using a 7.5-MHz microconvex probe in dorsal recumbency and in a standing ... [more ▼]

The urinary bladder of four dogs with emphysematous cystitis was assessed radiographically. Ultrasonography was also performed using a 7.5-MHz microconvex probe in dorsal recumbency and in a standing position. Ultrasonographically there were bright echoes and reverberations typical of gas in all dogs. This was entrapped in the bladder wall as it appeared in the same location in recumbent and standing positions. Bladder size was reduced and bladder content was echogenic in all dogs. In only one out of the four dogs was a gas stripe seen in the bladder on radiographs. Proteus mirahilis was isolated from the urine of all patients. Diabetes was ruled out on the basis of urine and blood analysis. A small amount of gas can be difficult to detect on radiographs. Ultrasonography appears to be a more sensitive technique for detection of gas within the bladder at an early stage of emphysematous cystitis. Prevalence of emphysematous cystitis may be underestimated if only radiographs are made. [less ▲]

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See detailSkin climacteric aging and hormone replacement therapy.
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Gaspard, Ulysse ULg et al

in Journal of Cosmetic Dermatology (2006), 5(1), 3-8

A gender perspective is indispensable for a full understanding of aging. Menopause is a turning point in women's lives. In addition to the effects of chronological aging, sunlight exposure, and other ... [more ▼]

A gender perspective is indispensable for a full understanding of aging. Menopause is a turning point in women's lives. In addition to the effects of chronological aging, sunlight exposure, and other environmental and endogenous stimuli, the climacteric appears to exert some dramatic consequences on skin biology and aspect. The epidermis may become xerotic and exhibit altered functions. The dermis thins out and its elasticity decreases in concert with the decline in bone mass. The skin microcirculation is impaired. These aspects are some of the better worked-out changes of the climacteric, which in turn seem to be stabilized or in part reversible with hormone replacement therapy (HRT). The HRT effect on menopause consequences on hair growth and sebum production is less impressive. This review summarizes some important impacts of the climacteric on skin, and highlights the benefits of HRT that may influence cosmetic dermatology. [less ▲]

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See detailTropical insects in collection at the University of Liège Museum of Zoology: a first approach
Loneux, Michèle ULg; Grogna, Philippe; Govers, Aurélie et al

in Segers, Hendrik; Desmet, P.; Baus, Erika (Eds.) Proceedings of the 3rd GBIF Science Symposium - Tropical Biodiversity: Science, Data, Conservation (2006)

The University of Liège Museum of Zoology holds some large and not well-known insect collections, which are still very well preserved, due to the work of famous entomologists and curators such as Fritz ... [more ▼]

The University of Liège Museum of Zoology holds some large and not well-known insect collections, which are still very well preserved, due to the work of famous entomologists and curators such as Fritz Carpentier and Noël Magis. Insects from tropical areas are very well presented in these collections and were collected all around the world. The expedition of Edouard van Beneden in Brazil (in company of two entomologists) provided numerous specimens, mainly Coleoptera. More than 8,500 insects were sent from Paraguay by the Estacion Entomologica ‘FABRE’ and are still preserved in the original mailing boxes. Due to investment of the University in cooperation projects with some African countries, numerous insects (mainly Lepidoptera and Coleoptera) were collected there between 1900 and 1990. The main source of exotic insect specimens is the “Léon Candèze’s collection of Lepidoptera from around the world”, which comprimes more than 9,500 specimens. A first inventory, which digitized all genera and families present in this collection, showed it contains at least five systematic types. However, the aforesaid collections need an in depth study from researchers interested in the genera and species they concern. Even though not every insect specimen is recorded in the handwritten registers or the collection database, the well- organised depositories allow finding them easy, and any request of study would be welcome. [less ▲]

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See detailIdentités et politique : quinze ans dans un miroir
Italiano, Patrick ULg

in Fédéralisme - Régionalisme (2006), 6

Synthèse de l'évolution, en quinze ans, des sentiments d'appartenance wallon, belge et européen de leurs dynamiques respectives, et mis en perspective des fluctuation avec les événements politiques des ... [more ▼]

Synthèse de l'évolution, en quinze ans, des sentiments d'appartenance wallon, belge et européen de leurs dynamiques respectives, et mis en perspective des fluctuation avec les événements politiques des périodes considérées. [less ▲]

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See detailAnalisis de la variabilidad molecular de una coleccion peruana de Smallanthus sonchofolius (Poepp & Endl) H. Robinson
Roberto, C.; Mansillas, S.; Lopez, C. B. et al

in Ecologia Aplicada (2006), 5(1,2), 75-80

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See detailForamen ovale perméable et migraines: association fortuite ou relation causale?
Schoenen, Jean ULg; Burette, P.; Materne, P.

in Revue Médicale de Liège (2006), 61(5-6, May-Jun), 362-8

Epidemiologic studies have shown a clear comorbidity between migraine with aura and a patent foramen ovale (PFO). Under the age of 55, migraine with aura is a risk factor for ischemic stroke and a ... [more ▼]

Epidemiologic studies have shown a clear comorbidity between migraine with aura and a patent foramen ovale (PFO). Under the age of 55, migraine with aura is a risk factor for ischemic stroke and a proportion of the latter is due to a PFO. It remains to be determined whether PFO is causally related to migraine attacks, or is a fortuitous association due to common genetic factors. Cortical spreading depression which is the underlying mechanism of the migrainous aura, could be favoured by a PFO. Several retrospective and uncontrolled studies suggest that percutaneous closure of a PFO for stroke or decompression illness in divers reduces frequency of migraine attacks with, but also without aura. Multicentric, prospective and controlled trials of this intervention in migraineurs are underway or in preparation. As long as their results are not known, there is no rationale for proposing PFO closure for migraine. [less ▲]

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See detailIodide organification disorder in autonomous thyroid nodule.
Tang, B.; Corvilain, B.; Seret, Alain ULg et al

in European Journal of Nuclear Medicine and Molecular Imaging (2006), 33(S2), 351

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See detailSome Issues for the Successful Implementation of an E-Government Project
Rondeaux, Giseline ULg

in Makkia, M.; Antiroikko, A. (Eds.) Encyclopedia of Digital Government (2006)

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See detailA new in vitro model of Microsporum canis dermatophytosis in reconstituted feline skin
Tabart, J.; Baldo, Aline ULg; Vermout, S. et al

Conference (2006)

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See detailControlled radical polymerization of vinyl monomers catalyzed by ruthenium N-heterocyclic carbene complexes
Delfosse, Sébastien; Richel, Aurore ULg; Delaude, Lionel ULg et al

in Matyjaszewski, K. (Ed.) Progress in Controlled/Living Radical Polymerization / ACS Symposium Series 944 (2006)

The relative catalytic activities of a series of ruthenium-based complexes of the general formula [RuCl2(p-cymene)(NHC)], [RuCl2(=CHPh)(PR3)(NHC)] and [RuCl2(=CHPh)(NHC)2] (NHC is a N-heterocyclic carbene ... [more ▼]

The relative catalytic activities of a series of ruthenium-based complexes of the general formula [RuCl2(p-cymene)(NHC)], [RuCl2(=CHPh)(PR3)(NHC)] and [RuCl2(=CHPh)(NHC)2] (NHC is a N-heterocyclic carbene ligand) were determined by investigating the atom transfer radical polymerization (ATRP) of methyl mathacrylate and styrene. The catalytic activity of a variety of related [RuCl(O^N)(=CHR)(NHC)] complexes and their cationic couterparts, [Ru(O^N)(=CHR)(NHC)]+BF4- (R = Ph or OEt, O^N is a Schiff base ligand), is also reported. The results clearly demonstrate that, with both methyl methacrylate and styrene, subtle modifications of the substituents of the NHC ligand lead to dramatic changes in the ability of the resulting ruthenium complexes to favor the occurence of a well-behaved ATRP. [less ▲]

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