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See detailChirurgie versus angioplastie des artères coronaires
Legrand, Victor ULg; Martinez, Christophe ULg

in Revue Médicale de Liège (1999), 54(7), 593-9

Revascularization techniques such as coronary angioplasty or coronary artery bypass surgery play a growing role in the management of coronary artery disease. Angioplasty is the treatment of choice for ... [more ▼]

Revascularization techniques such as coronary angioplasty or coronary artery bypass surgery play a growing role in the management of coronary artery disease. Angioplasty is the treatment of choice for single coronary lesions while surgery remains the best approach for the revascularization of multivessel disease. There are some exceptions to this rule, however. Bypass surgery may be recommended for the revascularisation of proximal left anterior descending lesions and, of course, for isolated left main stenosis. On the opposite, coronary angioplasty and stenting is used more frequently in the treatment of multivessel lesions amenable to this technique. Choice of either method of revascularization is pragmatic, based on clinical, anatomical and physiological considerations and organized in the setting of a medicosurgical collaboration. [less ▲]

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See detailChirurgie, radiotherapie ou hormonotherapie dans le traitement du cancer de la prostate
Bonnet, Pierre ULg; Coppens, Luc ULg; Andrianne, Robert ULg et al

in Revue Médicale de Liège (1999), 54(11), 875-85

Prostatic cancer (PC) became the first diagnosed cancer in western men and is the second leading cause of cancer death in men. Wide utilisation of serum PSA and free PSA measurements, identifies patients ... [more ▼]

Prostatic cancer (PC) became the first diagnosed cancer in western men and is the second leading cause of cancer death in men. Wide utilisation of serum PSA and free PSA measurements, identifies patients requiring transrectalultrasonography (TRUS) and TRUS guided biopsies. Most prostatic cancers diagnosed today are locally limited and may be treated by radical surgery or radiotherapy. In case of disseminated disease, hormonal manipulations remain the treatment of choice. In that field, many new drugs have been designed to allow medical castration with less complications, especially regarding sexual potency. [less ▲]

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See detailLe chirurgien face aux polyendocrinopathies familiales: attitudes pratiques. Deuxieme partie: La polyendocrinopathie familiale type 2.
Meurisse, Michel ULg; Gérard, J; Plumacker, A. et al

in Revue medicale de Liege (1989), 44(23), 724-30

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See detailLe chirurgien face aux polyendocrinopathies familiales: attitudes pratiques. Premiere partie: La polyendocrinopathie familiale type 1.
Meurisse, Michel ULg; Gérard, J; Plumacker, A. et al

in Revue medicale de Liege (1989), 44(23), 717-23

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See detailLe chirurgien Héliodore : tradition directe et indirecte
Marganne, Marie-Hélène ULg

in Sabbah, Guy (Ed.) Études de médecine romaine (1988)

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See detailChirurgue Bariatrique. morbi-mortalité chez les patients diabétiques.
RADERMECKER, Régis ULg

in Diabétologie Pratique (2008), 22

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See detailChitin biodegradation in marine environments : an experimental approach
Poulicek, Mathieu ULg; Jeuniaux, Charles ULg

in Biochemical systematics and ecology (1991), 19(5), 385-394

Chitin biomasses and production in marine environments are quite high. Planktonic biocenoses arte the main producers and one should expect that sediments, mainly organoclastic ones, will constitute some ... [more ▼]

Chitin biomasses and production in marine environments are quite high. Planktonic biocenoses arte the main producers and one should expect that sediments, mainly organoclastic ones, will constitute some kind of reserve compartment for the biogeochemical cycle of this polymer. In fact, this is not the case. The low chitin biomass in most marine sediments can only be explained if chitin is weathered at the same rate as it is produced. In order to test this hypothesis, we developed an experimental approach to chitin biodegradation in marine environments. In open water conditions, zooplanktonic remains are first degraded by autolytic processes making most organic compounds readily susceptible for further hydrolysis by extrinsic decomposers. Different populations (with high densities and various hydrolytic potentials) follow each other. The sequence of hydrolyc activities optimizes the recycling of most detritic compounds including nearly 90% of the chitin produced. At sediment-water interface, the remaining material appears to be pulvirized and incorporated into the aerobic sedimentary layers while the decomposer community changes once again. Sediment chitinoclasts are opportunistic and densities react quickly to chitin input. In sediments, oxic and anoxic, chitin appears essentially present in the form of chitinoproteic matrices inside mineralized skeletons. A rich population of microborers develops on these matrices by secreting extracellular hydrolases. Densities of microborers of 250-450 * 10 3 cm-2 are currently encountered. Anaerobic decomposers are more adapted to refractory compounds than aerobic ones. This leads to a nearly complete mineralization of the chitinoproteic matrices embedded in the biotic sedimentary layers (more than 90% of the chitin weathered within less than two years). [less ▲]

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See detailChitin biomass and production in the marine environment
Jeuniaux, Charles ULg; Voss-Foucart, Marie Françoise

in Biochemical Systematics & Ecology (1991), 19(5), 347-356

The total production nof chitin has been tentatively calculated on the basis of original analytical data on chitin in zooplankton and in benthic communities growing on experimental substrates studied in ... [more ▼]

The total production nof chitin has been tentatively calculated on the basis of original analytical data on chitin in zooplankton and in benthic communities growing on experimental substrates studied in the Mediterranean Sea, together with data in the literature dealing with total and exuviae production by krill and by some large crustacean species. It appears that crustaceans are the main chitin producers both in planktonic and benthic ecosystems, and that mean total production of chitin in the whole marine biocycle is at least of 2,3 billion metric tons per year. [less ▲]

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See detailChitin biomass in marine sedimenis
Poulicek, Mathieu ULg; Jeuniaux, Charles ULg

Scientific conference (1988)

One hundred marine sediments of various origins were screened in order to evaluate their chitin biomass. Our purpose was to assess the detritic chitin stocks in order to find some potential new source of ... [more ▼]

One hundred marine sediments of various origins were screened in order to evaluate their chitin biomass. Our purpose was to assess the detritic chitin stocks in order to find some potential new source of chitin. The chitin biomass of marine sediments is very diversified, from 2 up to 2 800 ug g-1 decalcified sediment (DS). Most sediments have low or very low chitin biomass (67 % under 100 ug g-1 DS). Nosignificant difference related to depth nor climatic influence was found except that all sediments richer in chitin (above 300 ug g-1 DS) are on the continental shelf (above 200 m depth). Actually, the chitin content is higher in coarse, much calcified sediments of organoclastic origin ; bryozoa and shelly sands and gravels are the richest. The [less ▲]

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See detailChitin biomass in marine sediments
Poulicek, Mathieu ULg; Jeuniaux, Charles ULg

in Skjak-Braek, A. (Ed.) Chitin and Chitosan (1988)

One hundred marine sediments of various origins were screened in order to evaluate their chitin biomass. Our purpose was to assess the detritic chitin stocks in order to find some potential new source of ... [more ▼]

One hundred marine sediments of various origins were screened in order to evaluate their chitin biomass. Our purpose was to assess the detritic chitin stocks in order to find some potential new source of chitin. The chitin biomass of marine sediments is very diversified, from 2 up to 2800 ug g-1 decalcified sediment (DS). Most sediments have low or very low chitin biomass (67% under 100 ug g-1 DS). No significant difference relmated to depth nor climatic influence was found except that all sediments richer in chitin (above 300 ug g-1 DS) are on the continental shelf (above 200m dephth). Actually, the chitin content is highter in coarse, much calcified sediments of organoclastic origin ; bryozoa and shelly sands and gravels are the richest. The powerful hydrolytic activity of microorganisms lower the steady state equilibrium level between chitin input and weathering, so most "unprotected" chitin is weathered very soon after settling. Marine sediments appears thus as a non comprtitive potential industrial chitin source. [less ▲]

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See detailChitin in biogeochemical cycles : Abstract 202
Jeuniaux, Charles ULg; Seki, H.

Conference (1990, August)

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See detailChitin location and subcellular organization during heterologous expression of chitin deacetylase in yeast Pichia pastoris
Jaspar-Versali, Marie-France ULg; Aifa, Karim; Compère, Philippe ULg et al

in Domard, Alain; Jeuniaux, Charles; Muzzarelli, Ricardo (Eds.) et al Advances in chitin sciences, volume I (1996)

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See detailChitin production by animals and natural communities in marine environment
Jeuniaux, Charles ULg; Bussers, Jean-Claude ULg; Voss-Foucart, M.F. et al

in Muzzarelli, R.; Jeuniaux, Charles; Gooday, G.W. (Eds.) Chitin in nature and technology (1986)

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See detailChitin-glucan complex production by Komagataella pastoris: downstream optimization and product characterization
Farinha, Inês; Duarte, Paulo; Pimentel, Ana et al

in Carbohydrate Polymers (2015), 130

Purified chitin-glucan complex (CGCpure) was extracted from Komagataella pastoris biomass using a hot alkaline treatment, followed by neutralization and repeated washing with deionised water. The co ... [more ▼]

Purified chitin-glucan complex (CGCpure) was extracted from Komagataella pastoris biomass using a hot alkaline treatment, followed by neutralization and repeated washing with deionised water. The co-polymer thus obtained had a glucan:chitin molar ratio of 75:25 and low protein and inorganic salts contents (3.0 and 0.9 wt%, respectively). CGCpure had an average molecular weight of 4.9 × 105 Da with a polydispersity index of 1.7, and a crystallinity index of 50%. Solid-state NMR provided structural insight at the co-polymer. X-ray diffraction and FTIR analysis suggest that CGCpure has b-chitin in its structure. CGCpure presented an endothermic decomposition peak at 315 oC, assigned to the degradation of the saccharide structures. This study revealed that K. pastoris CGC has properties similar to other chitinous biopolymers and may represent an attractive alternative to crustacean chitin derived-products, being a reliable raw material for the development of new/improved pharmaceutical, cosmetic or food products. [less ▲]

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See detailChitin-Glucan, a natural cell scaffold for skin rejuvenation: in vivo safety and efficacy.
Gautier, S.; Xhauflaire-Uhoda, Emmanuelle; Gonry, P. et al

in International Journal of Cosmetic Science (2008), 30

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See detailChitinase : an addition to the list of hydrolases in the digestive tract of vertebrates
Jeuniaux, Charles ULg

in Nature (1961), 192(4798), 135-136

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See detailChitinase et bactéries chitinolytiques dans le tube digestif d'un cloporte (Porcellio Scaber Latr.) (Isope, Oniscide)
Jeuniaux, Charles ULg

in Archives Internationales de Physiologie et de Biochimie (1956), 64(4), 583-586

Le tube digestif de Porcellio scaber Latr. (Isope Oniscide) contient une chitinase. Il héberge une flore bactérienne chitinolytique quantitativement plus abondante que celle du milieu extérieur et ... [more ▼]

Le tube digestif de Porcellio scaber Latr. (Isope Oniscide) contient une chitinase. Il héberge une flore bactérienne chitinolytique quantitativement plus abondante que celle du milieu extérieur et qualitativement différente. Ces bactéries chitinolytiques pourraient être responsables de l'élaboration de la chitinase du cloporte. [less ▲]

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See detailLa chitinase exuviale des Insectes
Jeuniaux, Charles ULg

in Mémoires de la Société Royale d'Entomologie de Belgique (1955), 27

1. Il est prouvé que le liquide exuvial des Insectes, sécrété peu avant la mue, contient une chitinase. Celle-ci dissout une partie importante des strates internes de la vieille cuticule (endocuticule ... [more ▼]

1. Il est prouvé que le liquide exuvial des Insectes, sécrété peu avant la mue, contient une chitinase. Celle-ci dissout une partie importante des strates internes de la vieille cuticule (endocuticule). Chez Platysamia cecropia L., le liquide exuvial est d'abord sécrété sous forme de gel, inactif au point de vue enzymatique. 2. Les extraits aqueux d'exuvies larvaires et nymphales sont doués de propriétés chitinolytiques, dues à la présence de liquide exuvial adhérent à la surface interne des exuvies. Certaines exuvies, telles que celles des nymphes de Tenebrio et des larves de Carausius, sont particulièrement riches en chitinase exuviale. 3. Chez toutes les espèces d'Insectes étudiées jusqu'à présent, on a pu mettre en évidence l'intervention d'une chitinase au moment de la mue. 4. La cinétique de la chitinase des exuvies ou du liquide exuvial de Bombyx mori et de Tenebrio molitor est identique, et ne diffère guère de celle des autres chitinases connues (pH optimum : entre 4.9 et 5.5 ; température optimale : 37° C.). [less ▲]

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See detailChitinases
Jeuniaux, Charles ULg

in Archives Internationales de Physiologie et de Biochimie (1958), 29(522), 644-650

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