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See detailIron(III) species dispersed in porous silica through sol-gel chemistry: nature, size, and catalytic activity
Heinrichs, Benoît ULg; Rebbouh, Leila; Geus, John W. et al

Conference (2006)

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See detailIron-manganese phosphates with the olivine- and alluaudite-type structures : crystal chemistry and applications
Hatert, Frédéric ULg

in Krivovichev, Sergey (Ed.) Mineral as Advanced Materials II (2012)

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See detailIron-manganese phosphates with the olivine- and alluaudite-type structures: crystal chemistry and applications
Hatert, Frédéric ULg

in Minerals as Advanced Materials II, Abstract Book (2010)

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See detailIron-Titanium oxide minerals in the Bjerkrem-Sogndal massif, south-western Norway
Duchesne, Jean-Clair ULg

in Journal of Petrology (1972), 13(1), 57-81

Ilmenite and magnetite are investigated from the point of view of their distribution, micro-texture, and chemical composition (major and minor elements) in the Bjerkreim-Sokndal massif (Egersund area ... [more ▼]

Ilmenite and magnetite are investigated from the point of view of their distribution, micro-texture, and chemical composition (major and minor elements) in the Bjerkreim-Sokndal massif (Egersund area, South-Rogaland, SW. Norway). This massif is an igneous layered lopolith made up of cumulates of the anorthosite-mangerite suite. The lower part of the massif presents a rhytmic structure. The microtextures of ilmenite result from simple exsolution of ilmenite-hematite solid solution. Magnetite contains intergrowths of ilmenite formed by oxidation-exsolution of ulvöspinel-magnetite solid-solution. In the stratigraphic sequence, on a large scale, ilmenite appears first alone, and is then accompanied by magnetite; its hematite content decreases towards the top of the massif, while the titanium content of the magnetite increases. On the scale of the rhythms, similar trends but of a lesser amplitude are also observed. Evidence of deuteric readjustment of the orthomagmatic composition of the two oxides is provided (1) by the observation of microtextures at the contact betwen grains (zoning of primary ilmenite and rim of secondary ilmenite) (2) by the existence of differences in chemical composition between isolated grains and grains in contact, and (3) bythe determination of the equilibrium temperature by means of the Buddington and Lindsley geothermonmeter. Reconstruction of the T-fO2 orthomagmatic conditions is provided in two particular levels of the massif shows that the reducing character of the magma increases during differentiation. The sudden changes in the oxide assembalge at the base of the rythmic units reflect a sudden increase in the fO2 of the magma. These increases, as shown by variation in Cr, Ni and Co, are due to recurrences of the basic character of the magma. The variations of the minor elements Mn, V, Ga, and Zn are interpreted in terms of the influence of the deuteric readjustment. It follows that the ratios Mn/Fe2+ ; Ga/Fe3+, and Zn/Fe2+ increase and that the ratio V/Fe3+ decreases in the magma in the course of differentiation. The distribution of Mn between ilmenite and magnetite is discussed. Intermittent supplies of undifferentiated magma are proposed as the geological mechanism controlling the chemical recurrencess associated with the rhythmic structure. [less ▲]

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See detailIronia e dissacrazione attraverso l’ekphrasis negli studi del Gattopardo
de Seta, Ilaria ULg

in Oblio – Osservatorio Bibliografico della Letteratura Italiana Otto-novecentesca (2012), II(8), 27-37

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See detailL’ironie dans Ounamon : les emplois de mk et de ptr
Winand, Jean ULg

in Göttinger Miszellen (2004), (200), 105-110

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See detailIronie et idéologie. Réflexions sur la responsabilité idéologique du texte
Denis, Benoît ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2007, February), (2),

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See detailIronie et paradoxe des temps parallèles dans les Nouvelles du Grand Possible de Marcel Thiry
Durand, Pascal ULg

Scientific conference (1985, March 20)

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See detailIronies et Utopies. Dimensions cosmologiques dans l’art contemporain
Bawin, Julie ULg

in Art Même : Chronique des Arts Plastiques de la Communauté française de Belgique (2005), (28), 27-28

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See detailIrradiation du petit bassin et fonction ano-rectale.
Gervaz, P; COUCKE, Philippe ULg; Gillet, M

in Gastroentérologie Clinique et Biologique (2001), 25

Le traitement adjuvant des cancers du rectum a pour buts de stériliser la maladie résiduelle infra-clinique et d’améliorer le contrôle local. Depuis plus de 20 ans, des milliers de malades ont été inclus ... [more ▼]

Le traitement adjuvant des cancers du rectum a pour buts de stériliser la maladie résiduelle infra-clinique et d’améliorer le contrôle local. Depuis plus de 20 ans, des milliers de malades ont été inclus dans des études randomisées, visant d’abord à mettre en évidence un gain de survie et une réduction des récidives loco-régionales, en relation avec la radiothérapie pré- ou postopératoire, combinée ou non à la chimiothérapie. Les conséquences en termes de qualité de vie de ces traitements ont pourtant été peu étudiées, et la tolérance fonctionnelle du néo-rectum et de l’appareil sphinctérien à la radiothérapie restent mal connues [1]. Les difficultés liées à l’étude des effets de l’irradiation sur les tissus normaux, ainsi que la variabilité inter-individuelle de la réponse à la radiothérapie, s’ajoutent et rendent le sujet plus complexe encore. Les radiothérapeutes adaptent leur technique afin de réduire autant que possible la dose administrée aux tissus normaux avoisinant la tumeur. Dans le cas de l’irradiation du petit bassin, c’est l’intestin grêle qui a longtemps été considéré comme la structure à risque de complications, alors que l’atteinte du sphincter anal était rarement mentionnée [2]. Malgré les répercussions importantes de la dysfonction ano-rectale sur la qualité de vie des malades, l’atteinte du sphincter anal par la radiothérapie est restée un aspect négligé du traitement adjuvant des cancers du petit bassin [3]. Cet article a pour but, à travers une revue de la littérature, de mettre en évidence les effets qualitatifs et quantitatifs de la radiothérapie sur la fonction du sphincter anal, ainsi que de proposer une modification de la technique actuelle d’irradiation des cancers du bas rectum. [less ▲]

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See detailL'irradiation partielle du sein et le role de la curietherapie: une nouvelle approche therapeutique pour les carcinomes mammaires de bon pronostic
Jansen, Nicolas ULg; Nickers, Philippe ULg; Deneufbourg, Jean-Marie ULg

in Revue Médicale de Liège (2006), 61(2), 97-103

Early breast cancer can be treated by conservative surgery followed by partial breast irradiation. This recent treatment replaces classical external beam whole breast radiotherapy. Several techniques are ... [more ▼]

Early breast cancer can be treated by conservative surgery followed by partial breast irradiation. This recent treatment replaces classical external beam whole breast radiotherapy. Several techniques are available but most experience does exist with interstitial catheter based brachytherapy. This well tolerated treatment shortens the treatment time and offers a good local control and cosmetic outcome, comparable to the best classical treatments, as confirmed by the first published results. These good results can only be obtained by rigorous patient selection and very precise 3D imaging and source implantation techniques. [less ▲]

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See detailIrregular earthquake cycle along the southern Tianshan front, China (Aksu area)
Hubert, Aurelia ULg; Suppe, J.; Van Der Woerd, J. et al

in Journal of Geophysical Research (2005), 110(10.1029/2003JB002603),

A long deformation record (􏰩16.5 ka) showing nonsteady earthquake recurrence is established for the Aksu thrust (Tianshan, China) on the basis of cosmogenic 10Be dating of faulted surfaces. Topographic ... [more ▼]

A long deformation record (􏰩16.5 ka) showing nonsteady earthquake recurrence is established for the Aksu thrust (Tianshan, China) on the basis of cosmogenic 10Be dating of faulted surfaces. Topographic leveling across the Aksu fault scarp indicates up to 􏰩10 m uplift across a moraine abandoned 􏰩16.5 ka and similar uplift of 􏰩6 m across two inset surfaces yielding ages of 􏰩12.5 and 􏰩5 ka. Successively smaller uplifts of terraces younger than 5 ka indicate that three or more major earthquakes occurred during this period. These data show that the Aksu thrust fault was quiet for at least 7500 years and active in the last 􏰩5000 years and probably in the interval 16.5–12.5 ka. The seismic cycle along the Aksu thrust fault over the last 􏰩16,500 years was thus strongly irregular showing long quiescence and clustering, which is a challenge for paleoseismology and hazard assessment. This irregularity also makes it more difficult to estimate long-term shortening rates. Nevertheless, we are able to constrain a minimum total shortening rate (>7 mm/yr) across the southern Tianshan front for the last 12,500 years that is about a third of the total geodetic rate for the western Tianshan (􏰩20 mm/yr). [less ▲]

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See detailThe irresistible need for educational research
De Landsheere, Gilbert ULg

Conference (1976, June)

The function of research is to perfect the tools of education and to manufacture new ones. Research opens up perspectives and informs teachers. The whole of the education system and all its components ... [more ▼]

The function of research is to perfect the tools of education and to manufacture new ones. Research opens up perspectives and informs teachers. The whole of the education system and all its components should be investigated if research is to be comprehensive and successful. Highly qualified teams of researchers are essential, bringing a variety of interests, knowledge, and points of view. Education is a human venture and also a realm of contingencies; it is important that educational research take into account the teacher's cultural background, intellectual limitations, needs, frustrations, and the real problems faced in the classroom. Full understanding and communication between researchers and teachers must exist if change and action are to result from educational exploration, evaluation, and future planning. (JD) [less ▲]

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See detailThe irresistible quest for new concepts, theories and paradigms
Martiniello, Marco ULg

in RC‐31 Newsletter (2012), (Autumn 2012), 1-2

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See detailIrreversible dynamics of the phase boundary in U(Ru(0.96)Rh(0.04))(2)Si(2) and implications for ordering
Silhanek, Alejandro ULg; Jaime, M.; Harrison, N. et al

in Physical Review Letters (2006), 96(13),

We report measurements and analysis of the specific heat and magnetocaloric effect-induced temperature changes at the phase boundary into the single magnetic field-induced phase (phase II) of U(Ru(0.96)Rh ... [more ▼]

We report measurements and analysis of the specific heat and magnetocaloric effect-induced temperature changes at the phase boundary into the single magnetic field-induced phase (phase II) of U(Ru(0.96)Rh(0.04))(2)Si(2), which yield irreversible properties similar to those at the valence transition of Yb(1-x)Y(x)InCu(4). To explain these similarities, we propose a bootstrap mechanism by which lattice parameter changes caused by an electric quadrupolar order parameter within phase II become coupled to the 5f-electron hybridization, giving rise to a valence change at the transition. [less ▲]

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See detailIrreversible magnetization under rotating fields and lock-in effect on a ErBa2Cu3O7-delta single crystal with columnar defects
Avila, M. A.; Civale, L.; Silhanek, Alejandro ULg et al

in Physical Review. B : Condensed Matter (2001), 64(14),

We have measured the irreversible magnetization (M-i) of an ErBa2Cu3O7-delta single crystal with columnar defects (CD), using a technique based on sample rotation under a fixed magnetic field H. This ... [more ▼]

We have measured the irreversible magnetization (M-i) of an ErBa2Cu3O7-delta single crystal with columnar defects (CD), using a technique based on sample rotation under a fixed magnetic field H. This method is valid for samples whose magnetization vector remains perpendicular to the sample surface over a wide angle range-which is the case for platelets and thin films-and presents several advantages over measurements of M-L(H) loops at fixed angles. The resulting M-i(Theta) curves for several temperatures show a peak in the CD direction at high fields. At lower fields, a very well defined plateau indicative of the vortex lock-in to the CD develops. The H dependence of the lock-in angle phi (L) follows the H-1 theoretical prediction, while the temperature dependence is in agreement with entropic smearing effects corresponding to long range vortex-defects interactions. [less ▲]

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