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See detailHydrothermal synthesis and crystal structure of Na(Na,Mn)(7)Mn-22(PO4)(18)0.5H(2)O, a new compound of fillowite structure type
Keller, Paul; Hatert, Frédéric ULg; Lissner, Falk et al

in European Journal of Mineralogy (2006), 18(6), 765-774

The chemical compound Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O was synthesized with a Tuttle pressure vessel at 800 degrees C and 1 kbar during experimental investigations on the conditions of ... [more ▼]

The chemical compound Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O was synthesized with a Tuttle pressure vessel at 800 degrees C and 1 kbar during experimental investigations on the conditions of fillowite formation. The crystal structure of a single-crystal, space group R (No. 148), a = 15.2741(9), c = 43.334(3) angstrom, Z = 6, was determined from X-ray intensity data and refined up to R-1 = 0.0728 and R-l{FO > 4 sigma(FO)} = 0.0546. The crystal structure of Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O is similar to the structure of fillowite, Na6Ca3(Mn,Fe)(21)(PO4)(18.), but a significant difference between the synthetic H2O containing compound and fillowite is the replacement of (Na12)O-8(-) by Mn(H2O)(2)O-5(-) polyhedra, which form characteristic six-member rings. The coordination polyhedra around Na12 and Mn12 are so different that simple isomorphous substitution of Na12 by Mn12 is very unlikely, but whole six-member rings either of (Na12)O-8(-) or (Mn12)(H2O)(2)O-5 polyhedra seem to be distributed statistically over the crystal structure. No indication for ordering, e.g. sheet by sheet, has been observed. Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O is the first fillowite-like compound for which water is located in the structure from single-crystal study. This result is proved by infrared spectral data and indicates that water can play an essential role in the fillowite structure-type. Structural features of the synthetic compounds Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O, Na4Ca4Mg21(PO4)(18) and fillowite are compared. [less ▲]

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See detailHydrothermal Synthesis and Structure of Fe6.36Mn0.64(PO3(OH))4(PO4)2
Belfguira, Nadia; Walha, S.; Ben Salah, A. et al

in Journal of Chemical Crystallography (2010), 40

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See detailHydrothermal Synthesis and Structure of the Solid Solution (Fe0.54Mn0.46)(PO4)•2H2O
Belfguira, Nadia; Walha, S.; Kabadou, A. et al

in Journal of Chemical Crystallography (2011), 41

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See detailHydrothermal Synthesis of Alluaudite in the Na-Mn-Fe2+-Fe3+-P-O System
Hatert, Frédéric ULg

in Journal of Conference Abstracts (2002), 7(1), 44

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See detailHydrothermal synthesis of tailored new  promising phosphate particles for lithium and sodium ion batteries
Karegeya, Claude ULg; Mahmoud, Abdelfattah ULg; Sougrati Tahar, Moulay et al

Conference (2016, December 16)

The rechargeable Li-ion batteries dominate the currently used storage systems due to their unrivalled electrochemical properties. However, this technology needs more improvements to meet coast, high ... [more ▼]

The rechargeable Li-ion batteries dominate the currently used storage systems due to their unrivalled electrochemical properties. However, this technology needs more improvements to meet coast, high capacity, safety and environmental requirements. Current researches on Li-ion batteries are focusing on the development of safe and cheap electrode compounds with good electrochemical performance. Iron phosphate-based electrodes have attracted increasing interest due to their environmental compatibility, low cost and its promising electrochemical performance as positive electrode materials in LIB. In this work, we report the electrochemical properties of Fex(PO4)(OH)y.zH2O) cathode material obtained by one-pot hydrothermal synthesis route, a technique which produces the particles with suitable properties for electrode application. We show that the addition of a conducting carbon (carbon black or carbon nanotubes) into the solution has a strong influence on reducing the size and tailoring morphology of material particles. These are among the main factors to enhance the electrochemical performance of the material. Combined with electrochemical and XRD studies, operando Mössbauer analysis shows that Fex(PO4)(OH)y.zH2O) undergoes a reversible reduction/oxidation during lithium intercalation/ deintercalation processes. Acknowledgments This work was supported by the Walloon Region through the BATWAL project [PE Plan Marshall 2.vert]; and the Beware Fellowship Academia [2015-1, RESIBAT n° 1510399]. [less ▲]

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See detailHydrothermal synthesis, crystal chemistry, and stability of fillowite-type phosphates in the Na-Mn-Fe2+-Mg-PO4 system
Rondeux, Mélanie ULg; Hatert, Frédéric ULg

in Acta Mineralogica-Petrographica, Abstract series (2010), 6

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See detailHydrothermal transformations of triphylite from the Nanping No. 31 pegmatite dyke, Southeastern China.
RAO; Wang, R; Hatert, Frédéric ULg et al

in European Journal of Mineralogy (2014), 26

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See detailHydrotreatment of petroleum atmospheric residua using oceanic polymetallic nodules in trickle bed reactor
Dodet, Claude ULg; Noville, Francis ULg; Crine, Michel ULg et al

in Bulletin des Sociétés Chimiques Belges (1985), 94

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See detailHydroxyacids
PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg; PIERARD, Gérald ULg

in Cosmeceuticals-drugs vs cosmetics (2011)

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See detailHydroxychloroquine (Plaquenil) for recurrence prevention of Crohn's disease after curative surgery.
Louis, Edouard ULg; Belaiche, Jacques ULg

in Gastroentérologie Clinique et Biologique (1995), 19(2), 233-4

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See detailHydroxyethyl Starch 130/0.4 and the Risk of Acute Kidney Injury After Cardiopulmonary Bypass: A Single-Center Retrospective Study.
LAGNY, Marc-Gilbert ULg; ROEDIGER, Laurence ULg; KOCH, Jean-Noël ULg et al

in Journal of Cardiothoracic and Vascular Anesthesia (2015)

Hydroxyethyl Starches (HES) have been shown to increase the risk of acute kidney injury (AKI) in intensive care unit patients suffering sepsis. Whether this risk also applies to patients undergoing ... [more ▼]

Hydroxyethyl Starches (HES) have been shown to increase the risk of acute kidney injury (AKI) in intensive care unit patients suffering sepsis. Whether this risk also applies to patients undergoing elective surgery remains unclear. We investigated whether HES is associated with acute kidney injury after on-pump cardiac surgery. Materials and Methods: Balanced HES 130/0.4 (Volulyte®, Fresenius Kabi AG, Bad Homburg, Germany) was used as a pump prime and for intraoperative fluid therapy until July 2013 and has been entirely replaced by a balanced crystalloid solution (Plasmalyte®, Baxter, Lessines, Belgium) from August 2013. Data from 697 adult patients undergoing cardiac surgery between April 2013 and June 2014 were reviewed. HES patients were propensity-matched on previously published risk factors for AKI after cardiac surgery to patients treated with crystalloids. Postoperative AKI was defined as the primary outcome and assessed using the Acute Kidney Injury Network classification. A conditional logistic regression was used to investigate the association between the use of HES and postoperative AKI. Secondary outcomes included renal function at postoperative day 7, 30-day mortality, lengths of ICU and hospital stays and the incidence of postoperative respiratory complications. Results and Discussion: One hundred and thirty HES patients were successfully matched with 130 crystalloids patients. HES was significantly associated with postoperative AKI (odds ratio=2.4; 95 % CI= 1.2-4.8; P=0.02). No significant association was found between HES and any of the secondary outcomes. Conclusion: This study suggests that using balanced HES 130/0.4 as a pump prime and for intraoperative fluid therapy in adult patients undergoing on-pump cardiac surgery is associated with a higher incidence of AKI during the early postoperative period. [less ▲]

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See detailHydroxyl detection on Venus and Earth and implications for ozone
Migliorini; Piccioni, G.; Cardesin-Molino, A. et al

Poster (2009)

We present a comparison between hydroxyl night side infrared emissions on Earth and Venus. The vertical brightness distributions of the OH emissions are shown for the two planets and excitation processes ... [more ▼]

We present a comparison between hydroxyl night side infrared emissions on Earth and Venus. The vertical brightness distributions of the OH emissions are shown for the two planets and excitation processes are discussed. [less ▲]

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See detailThe Hydroxyl Nightglow Emissions on Earth, Venus and Mars
Soret, Lauriane ULg; Gérard, Jean-Claude ULg; Piccioni, G. et al

Poster (2015, August)

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See detailHydroxyl nightglow on Venus observed by VIRTIS on Venus-Express
Migliorini, A.; Piccioni, G.; Gérard, Jean-Claude ULg et al

Conference (2009, April)

Hydroxyl has been recently observed for the first time in the Venus atmosphere with the VIRTIS spectrometer on board the Venus-Express spacecraft. The (1-0) around 2.81 microns and the (2-0) around 1.46 ... [more ▼]

Hydroxyl has been recently observed for the first time in the Venus atmosphere with the VIRTIS spectrometer on board the Venus-Express spacecraft. The (1-0) around 2.81 microns and the (2-0) around 1.46 microns transitions have been detected. The intensity of the two emissions are respectively about 55 and 480 times less intense than the (0-0) oxygen transition (Piccioni et al, A&A, 2008). The possible chemical reactions which can produce hydroxyl on Venus involve O3 and HO2, with the former being the most probable, and hence OH can be used to indirectly infer the ozone distribution on Venus. VIRTIS data in limb mode observation were analyzed to derive the mean distribution of hydroxyl in the night side of Venus and the results are presented here. The typical peak altitude of the two emissions is set at 95-96 km in limb view, a few km lower than the oxygen emission at 1.27 um due to the transition (0-0). The peak altitude of the latter typically occurs at 97-98 km height. The OH full width at half maximum is in average about 7 km, and sometimes higher. The mean map of (1-0) hydroxyl distribution around 2.81 microns shows a maximum of emission of about 130 kR at about 1h local time. The study of the (2-0) hydroxyl distribution at around 1.46 microns results more difficult due to its weak intensity. [less ▲]

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See detailHydroxyl radical generation by new furocoumarin derivatives: a spin trapping and ESR study
Collet, M.; Hoebeke, Maryse ULg; Piette, J. et al

Conference (1993)

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See detailHydroxymethylfurfural: a possible emergent cause of honey bee mortality?
Zirbes, Lara ULg; Nguyen, Bach Kim ULg; de Graaf, DC et al

in Journal of Agricultural and Food Chemistry (2013), 61(49), 11865-11870

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See detailHydroxyurea for sickle cell disease in children and for prevention of cerebrovascular events: the Belgian experience.
Gulbis, B; Haberman, D; Dufour, D et al

in Blood (2005), 105(7), 2685-90

Hydroxyurea (HU) is considered to be the most successful drug therapy for severe sickle cell disease (SCD). Nevertheless, questions remain regarding its benefits in very young children and its role in the ... [more ▼]

Hydroxyurea (HU) is considered to be the most successful drug therapy for severe sickle cell disease (SCD). Nevertheless, questions remain regarding its benefits in very young children and its role in the prevention of cerebrovascular events.There were 127 SCD patients treated with no attempt to reach maximal tolerated doses who entered the Belgian Registry:109 for standard criteria and 18 who were at risk of stroke only. During 426 patient-years of follow-up for patients with standard criteria, 3.3 acute chest syndromes, 1.3 cerebrovascular events, and 1.1 osteonecrosis per 100 patient-years were observed.A subgroup of 32 patients followed for 6 years experienced significant benefit over this period. In each subgroup of children (younger than 2 years, 2-5, 6-9, and 10-19 years) followed for 2 years,clinical and biologic changes were similar,except for children younger than 2 years who had no total hemoglobin increase and remained at risk of severe anemia. In 72 patients evaluated by transcranial Doppler studies (TCD), 34 patients were at risk of primary stroke and only 1had a cerebrovascular event after a follow-up of 96 patient-years. These results confirm the benefit of HU, even in very young children, and its possible role in primary stroke prevention. [less ▲]

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See detailHydroxyuree et infection par le VIH
Nkoghe, D.; Kola, L.; Leonard, Philippe ULg et al

in Revue Médicale de Liège (2000), 55(7), 721-4

Hydroxyurea is an anticancerous product, used recently in the treatment of HIV-1 infection thanks to its inhibitory action in viral replication, potentialization of the nucleosides activity (particularly ... [more ▼]

Hydroxyurea is an anticancerous product, used recently in the treatment of HIV-1 infection thanks to its inhibitory action in viral replication, potentialization of the nucleosides activity (particularly ddI or didanosine) and its cytostatic properties on CD4 and CD8 lymphocytes. Many studies showed its efficiency, as further drug, in initial regimen of a tritherapy (containing ddI) and salvage therapy. The dosage of 500 mg bid seems tolerated well by adults, and 20 mg/kg by children. Long-term tolerance remains unknown. With ddI, it could be proposed in developing countries. [less ▲]

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See detailHygiene and Cleanability : a focus on surfaces.
Detry, J. G.; Sindic, Marianne ULg; Deroanne, Claude

in Critical Reviews in Food Science & Nutrition (2009)

Detailed reference viewed: 65 (7 ULg)