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See detailProduction of orbitally excited vector mesons in diffractive DIS
Caporale, Francesco; Ivanov, Igor ULg

in Physics Letters B (2005), 622(1-2), 55-62

Within the kt-factorization framework, we study diffractive production of orbitally excited vector mesons and compare it with the production of radial excitations, focusing on the ρ(1450)/ρ(1700) case. At ... [more ▼]

Within the kt-factorization framework, we study diffractive production of orbitally excited vector mesons and compare it with the production of radial excitations, focusing on the ρ(1450)/ρ(1700) case. At small Q2, orbital excitation of light quarkonia is found to dominate over radial excitations in diffractive production. We predict strong suppression of the production of orbital excitations by longitudinal photons, which leads to very small σL/σT ratio. At small Q2, the s-channel helicity violating transitions contribute not, vert, similar10–15% of the transverse cross section and not, vert, similar50% of the longitudinal cross section. We also study mixing between radial and orbital excitations and determine strategies towards clarification of S-wave/D-wave assignment to ρ(1450) and ρ(1700) mesons. The results are compared with the experimental data available, and predictions for future experiments are given. [less ▲]

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See detailProduction of polymer/clay nanocomposite foams with improved fire behaviour using supercritical fluid technology
Urbanczyk, Laetitia ULg; Calberg, Cédric ULg; Detrembleur, Christophe ULg et al

Poster (2009, June 19)

In this study, supercritical CO2 is successfully used as foaming agent to prepare poly(styrene-co-acrylonitrile) (SAN) foams containing a low amount of well-dispersed nanoclay (5wt%). This kind of ... [more ▼]

In this study, supercritical CO2 is successfully used as foaming agent to prepare poly(styrene-co-acrylonitrile) (SAN) foams containing a low amount of well-dispersed nanoclay (5wt%). This kind of nanofiller has an influence both on material cellular morphology and fire property. In fact, SAN foam filled with nanoclay has smaller cells and higher density compared to unfilled foam. Moreover, the nanocomposite foam burns more slowly and without producing any burning droplets, which is highly desirable when considering housing applications. [less ▲]

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See detailThe production of pro- and anti-inflammatory cytokines in neonates assessed by stimulated whole cord blood culture and by plasma levels at birth.
SEGHAYE, Marie-Christine ULg; Heyl, W.; Grabitz, R. G. et al

in Biology of the Neonate (1998), 73(4), 220-7

The capability of neonates to achieve cytokine balance was evaluated. Production of the pro-inflammatory cytokines TNF alpha and IL-8, of the natural anti-inflammatory cytokine IL10 and of the regulator ... [more ▼]

The capability of neonates to achieve cytokine balance was evaluated. Production of the pro-inflammatory cytokines TNF alpha and IL-8, of the natural anti-inflammatory cytokine IL10 and of the regulator of the acute phase response IL6 was assessed after whole blood stimulation by lipopolysaccharide in cord blood (n = 10), adult volunteers serving as control (n = 17). Additionally, circulating cytokines were determined in cord and in maternal blood immediately after delivery (n = 27, respectively). Significant production of TNF alpha, IL8, IL10 and IL6 was observed in cord blood after lipopolysaccharide stimulation and was similar to cytokine production in adult blood. The plasma concentrations of TNF alpha were significantly higher in cord than in maternal blood, while plasma concentrations of IL10 and IL6 were significantly lower. Our results demonstrate fully developed capability of whole cord blood to synthesize pro- and anti-inflammatory cytokines in response to a pro-inflammatory stimulation in vitro. In vivo, however, higher circulating TNF alpha and lower IL10 and IL6 levels in cord blood suggest that the inflammatory stress associated with normal delivery does not induce detectable anti-inflammatory response in neonates at birth. [less ▲]

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See detailProduction of proinflammatory cytokines and myocardial dysfunction after arterial switch operation in neonates with transposition of the great arteries.
Hovels-Gurich, Hedwig H; Vazquez-Jimenez, Jaime F; Silvestri, Anna et al

in Journal of Thoracic and Cardiovascular Surgery (The) (2002), 124(4), 811-20

OBJECTIVE: Neonates undergoing cardiac surgery have a systemic inflammatory reaction with release of proinflammatory cytokines, which could be responsible for myocardial dysfunction as a result of ... [more ▼]

OBJECTIVE: Neonates undergoing cardiac surgery have a systemic inflammatory reaction with release of proinflammatory cytokines, which could be responsible for myocardial dysfunction as a result of myocardial cell damage. The purpose of this study was to test the hypothesis that the production of proinflammatory cytokines during cardiac surgery would be associated with myocardial dysfunction after the arterial switch operation in neonates. METHODS: A total of 63 neonates with transposition of the great arteries were operated on with combined deep hypothermic circulatory arrest and low-flow cardiopulmonary bypass at a median age of 7 days. Perioperative plasma concentrations of interleukins 6 and 8 were correlated with myocardial dysfunction, as assessed clinically and by echocardiography within 24 hours after the operation, and with perioperative cardiac troponin T blood levels as a marker of myocardial cell damage. RESULTS: Myocardial dysfunction was observed in 11 patients (17.5%), and 2 of them died. Durations of cardiopulmonary bypass and aortic crossclamping, but not of circulatory arrest, were correlated with myocardial dysfunction. Patients with myocardial dysfunction had significantly higher cardiac troponin T blood levels at the end of cardiopulmonary bypass and 4 and 24 hours after the operation than did patients without myocardial dysfunction. Patients with myocardial dysfunction also had higher interleukin 6 plasma concentrations after cardiopulmonary bypass and 4 hours after the operation, as well as higher interleukin 8 plasma concentrations 4 and 24 hours after the operation, than did those without myocardial dysfunction. Postoperative interleukin 6 and 8 plasma concentrations were significantly correlated with postoperative cardiac troponin T blood levels. Multivariable analysis of independent risk factors for myocardial dysfunction comprising cytokine and troponin levels and bypass duration revealed interleukin 6 levels 4 hours after the operation as significant (P =.047). CONCLUSIONS: Cardiac operations in neonates stimulate the production of proinflammatory cytokines, which may contribute to myocardial cell damage and myocardial dysfunction. [less ▲]

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See detailProduction of resorcinol formaldehyde xerogels by convective drying
Léonard, Angélique ULg; Jomaa, Wahbi; Crine, Michel ULg

in Proceedings of the joint conference of AFSIA (Association Française pour le Séchage dans l’Industrie et l’Agriculture) and Working group on Drying of EFCE at INA P-G, Paris, 12th and 13th May, 2005 (2005, May)

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See detailProduction of selenium-enriched grass and haylage by mineral fertilisation in southern Belgium
de Behr, V.; Coenen, M.; Hambuckers, Alain ULg et al

in Proceedings of 7th Conference of the European Society of Veterinary and Comparative Nutrition (2003)

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See detailProduction of siderophores in antagonistic and non-antagonistic strain of Pseudomonas,
Jacques, Ph.; Ongena, Marc ULg; Delfosse, Ph. et al

Poster (1990, July)

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See detailThe Production of Statistics for the Social Economy in Belgium: a focus on Mutuals and Cooperatives
Fecher-Bourgeois, Fabienne ULg; Ben Sedrine, Wafa ULg

in Bouchard, M; Rousselière, D (Eds.) The Weight of the Social Economy - An International Perspective on the Production of Statistics for the Social Economy (in press)

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See detailProduction of sulfur from gypsum as an industrial by-product.
Hiligsmann, Serge ULg; Taillieu, X.; Deswaef, S. et al

Poster (1995, May)

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See detailProduction of sulfur from gypsum as an industrial byproduct
Hiligsmann, Serge ULg; Deswaef, Sophie; Taillieu, Xavier et al

in Applied Biochemistry and Biotechnology (1996), 57-8

Biological sulfate reduction was investigated at the bench and pilot scales in order to determine optimum culture conditions. Efficient strains of sulfate-reducing bacteria (SRB) were selected by ... [more ▼]

Biological sulfate reduction was investigated at the bench and pilot scales in order to determine optimum culture conditions. Efficient strains of sulfate-reducing bacteria (SRB) were selected by classical microbiological methods and by mutagenesis. Improvement factors, including stripping, scale-up, sulfate,and organic substrate concentrations, have been studied in batch bioreactors. Two types of pilot-scale bioreactors have been adopted, the first being completely mixed with free cells and the second having two stages with immobilized cells on a fixed bed. An overall bioconversion capacity of 11 kg/m(3) . d of gypsum and 1.2 kg/m(3) . d of dissolved organic carbon has been achieved in the two-stage bioreactor. [less ▲]

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See detailProduction of sulfuric acid and installation therefor
Arpentinier, Philippe; Dumont, Marie-Noëlle ULg; Kalitventzeff, Boris ULg

Patent (2000)

In the production of sulfuric acid by (a) oxidizing a sulfurous material with an oxidant to obtain sulfur dioxide, (b) catalytically oxidizing this with oxygen to obtain sulfur trioxide and (c) producing ... [more ▼]

In the production of sulfuric acid by (a) oxidizing a sulfurous material with an oxidant to obtain sulfur dioxide, (b) catalytically oxidizing this with oxygen to obtain sulfur trioxide and (c) producing sulfuric acid and a waste gas, at least part of the waste gas is recycled to the first step. The fabrication of sulfuric acid consists of: (a) producing sulfur dioxide from a sulfur based material and an oxidant; (b) converting catalytically the sulfur dioxide into trioxide in a catalytic converter fed with oxygen; and (c) producing sulfuric acid from the sulfur trioxide. In the last step, some other gases are also produced which are (partially) recycled into the oxidant used in step (a). An Independent claim is also included for apparatus for performing the process. The apparatus for H2SO4 production consists of: (a) production unit (10') of SO2 from a sulfurous raw material and an oxidant; (b) catalytic converter (20') of SO2 equipped with means of feeding O2; and (c) preparation unit (30') of H2SO4 from SO3 It comprises also means for recycling waste gases at the outlet of the preparation unit (30') of H2SO4 towards the SO2 production unit (10'). [less ▲]

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See detailProduction of surface-active agents and antioxidants from renewable resources under microwave heating
Richel, Aurore ULg

Conference (2012, November)

The non-energetic valorization of renewable resources using efficient and eco-friendly methodologies is the central axis of the “green chemistry” concept. In particular, the chemical conversion of ... [more ▼]

The non-energetic valorization of renewable resources using efficient and eco-friendly methodologies is the central axis of the “green chemistry” concept. In particular, the chemical conversion of carbohydrates arising from the hydrolysis of non-edible vegetable feedstock (i.e., lignocellulosic biomass and streams) is a widely explored thematic for the production of new high-added value materials. In this context, we report here on the development of a microwave heating methodology for the efficient production of carbohydrate-based and lignin-based chemicals with relevant antioxidant and surface-active properties. New effective synthetic protocols minimizing wastes and energy-consumption are proposed. Enhanced yields and selectivities are achieved after a few minutes of microwave heating using heterogeneous catalysts. The benefits of this microwave approach are highlighted in terms of yields, atom efficiency, environmental factor, and carbon efficiency. Up-scaling assays are also discussed. [less ▲]

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See detailProduction of three anti-listerial peptides by Lactobacillus curvatus in MRS broth.
Ghalfi, H.; Benkerroum, N.; Ongena, Marc ULg et al

in Food Research International (2010), (43), 33-39

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See detailThe Production of Titan's Ultraviolet Nitrogen Airglow
Stevens, Michael H.; Gustin, Jacques ULg; Ajello, J. M. et al

in AAS/Division for Planetary Sciences Meeting Abstracts #42 (2010, October 01)

The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed Titan's dayside limb on 22 June, 2009, obtaining high quality extreme ultraviolet (EUV) and far ultraviolet (FUV) spectra from a distance of ... [more ▼]

The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed Titan's dayside limb on 22 June, 2009, obtaining high quality extreme ultraviolet (EUV) and far ultraviolet (FUV) spectra from a distance of only 60,000 km (23 Titan radii). The observations reveal the same EUV and FUV emissions arising from photoelectron excitation and photofragmentation of molecular nitrogen (N[SUB]2[/SUB]) on Earth but with the altitude of peak emission much higher on Titan near 1000 km altitude. In the EUV, emission bands from the photoelectron excited N[SUB]2[/SUB] Carroll-Yoshino c[SUB]4[/SUB]'-X system and N I and N II multiplets arising from photofragmentation of N[SUB]2[/SUB] dominate, with no detectable c[SUB]4[/SUB]'(0,0) emission near 958 Å, contrary to many interpretations of the lower resolution Voyager 1 Ultraviolet Spectrometer data. The FUV is dominated by emission bands from the N[SUB]2[/SUB] Lyman-Birge-Hopfield a-X system and additional N I multiplets. We also identify several N[SUB]2[/SUB] Vegard-Kaplan A-X bands between 1500-1900 Å, two of which are located near 1561 and 1657 Å where C I multiplets were previously identified from a separate UVIS disk observation. We compare these limb emissions to predictions from a terrestrial airglow model adapted to Titan that uses a solar spectrum appropriate for these June, 2009 observations. Volume production rates and limb radiances are calculated, including extinction by methane and allowance for multiple scattering within the readily excited c[SUB]4[/SUB]'(0,v') system, and compared to UVIS observations. We find that for these airglow data only emissions arising from processes involving N[SUB]2[/SUB] are present. [less ▲]

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See detailThe production of Titan's ultraviolet nitrogen airglow
Stevens, Michael H; Gustin, Jacques ULg; Ajello, Joseph M et al

in Journal of Geophysical Research. Space Physics (2011), 116

The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed Titan's dayside limb in the extreme ultraviolet (EUV) and far ultraviolet (FUV) on 22 June 2009 from a mean distance of 23 Titan radii. These ... [more ▼]

The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed Titan's dayside limb in the extreme ultraviolet (EUV) and far ultraviolet (FUV) on 22 June 2009 from a mean distance of 23 Titan radii. These high-quality observations reveal the same EUV and FUV emissions arising from photoelectron excitation and photofragmentation of molecular nitrogen (N[SUB]2[/SUB]) as found on Earth. We investigate both of these solar driven processes with a terrestrial airglow model adapted to Titan and find that total predicted radiances for the two brightest N[SUB]2[/SUB] band systems agree with the observed peak radiances to within 5%. Using N[SUB]2[/SUB] densities constrained from in situ observations by the Ion Neutral Mass Spectrometer on Cassini, the altitude of the observed limb peak of the EUV and FUV emission bands is between 840 and 1060 km and generally consistent with model predictions. We find no evidence for carbon emissions in Titan's FUV airglow in contrast to previous Titan airglow studies using UVIS data. In their place, we identify several vibrational bands from the N[SUB]2[/SUB] Vegard-Kaplan system arising from photoelectron impact with predicted peak radiances in agreement with observations. These Titan UV airglow observations are therefore comprised of emissions arising only from solar processes on N[SUB]2[/SUB] with no detectable magnetospheric contribution. Weaker EUV Carroll-Yoshino N[SUB]2[/SUB] bands within the v′ = 3, 4, and 6 progressions between 870 and 1020 Å are underpredicted by about a factor of five while the (0,1) band near 980 Å is overpredicted by about a factor of three. [less ▲]

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See detailProduction of tumour necrosis factor-alpha, interferon-gamma and interleukin-2 by peripheral blood mononuclear cells of subjects suffering from rheumatoid arthritis
Franchimont, P.; Reuter, A.; Vrindts-Gevaert, Y. et al

in Scandinavian Journal of Rheumatology (1988), 17(3), 203-212

Using radio-immunoassay methods, the production of tumour necrosis factor-alpha (TNF-alpha), interleukin-2 (IL-2), and interferon-gamma (IFN-gamma) released by peripheral blood mononuclear cells (PBMC ... [more ▼]

Using radio-immunoassay methods, the production of tumour necrosis factor-alpha (TNF-alpha), interleukin-2 (IL-2), and interferon-gamma (IFN-gamma) released by peripheral blood mononuclear cells (PBMC), maintained in culture and stimulated by phytohemagglutinin (PHA), was measured in normal subjects and patients with active or inactive rheumatoid arthritis (RA). Results indicated a dissociation between mitogenic response and secretion of mediators by PBMC under the influence of PHA in both normal controls and in patients with rheumatoid arthritis (RA). While [3H]thymidine incorporation was characterized by a rather bell-shaped curve with increasing concentrations of PHA, IL-2 and TNF-alpha displayed a linear dose-dependent increase. [3H]thymidine uptake by PBMC was in the same range in normal subjects as in patients with active and inactive RA, although cytokine secretion differed. The PBMC of patients with active RA produced less TNF-alpha, IL-2, and IFN-gamma than did those of the controls. In cases of inactive RA, the secretory response varied from subject to subject; mean values did not differ from those of normal subjects, except for those of IL-2 (p less than 0.01). The significance and the clinical relevance of these findings are discussed. [less ▲]

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See detailPRODUCTION OF XANTHAN GUM FROM XANTHOMONAS CAMPESTRIS NRRL B-1459 BY FERMENTATION OF DATE JUICE PALM BY-PRODUCTS (PHOENIX DACTYLIFERA L.)
Ben Salah, Riadh; Chaari, Kacem; Besbes, Souhail et al

in Journal of Food Process Engineering (2011), 34(2), 457-474

In this work, we studied the possibility to use date juice for xanthan gum production by Xanthomonas campestris NRRL B-1459. The results showed that this strain has a high ability to metabolize date juice ... [more ▼]

In this work, we studied the possibility to use date juice for xanthan gum production by Xanthomonas campestris NRRL B-1459. The results showed that this strain has a high ability to metabolize date juice. The data on optimization of physiological conditions of fermentation, pH, temperature, inoculum's size, glucose and nitrogen concentration showed that the maximum xanthan yield of 24.5 g/L was obtained from 60 g/L glucose, 3 g/L ammonium sulphate when batch fermentation was carried with 5% inoculum's size at pH 7, 28C, 48 h, on a rotary orbital shaker at 180 rpm. The polysaccharide purified by high performance liquid chromatography and analyzed by thin layer chromatography contained glucose, glucoronic acid and mannose. PRACTICAL APPLICATIONS Agri-food by-products rich in sugars may be used to produce high added value food ingredients such as xanthan gum. No work has studied the production of this polysaccharide from date. This study is focused on given value addition to date by-product (hard texture) by production of xanthan gum. The effect of several parameters (pH, temperature, inoculum's size, agitation speed, nitrogen source and carbon concentration) on production yield was investigated. [less ▲]

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