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See detailFerrante Palla : un poète à la cour de Parme
Denis, Benoît ULg

in Tangence (1998, May), (57), 87-94

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See detailLa ferritine érythrocytaire
Guillemin, Ch; Revenant, M. C.; Vernet, V. et al

in Annales de Biologie Clinique (1993), 51

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See detailFerro-potassic a-type granites and related rocks in NE Poland and S Lithuania: West of the East European Craton
Skridlaite, Grazina; Wiszniewska, Janina; Duchesne, Jean-Clair ULg

in Precambrian Research (2003), 124(2-4), 305-326

The present study of monzodiorite, quartz monzodiorite, monzonite, quartz syenite, granodiorite, and rapakivi-like granite surrounding the Suwalki, Ketrzyn and Sejny anorthosite, norite and gabbro plutons ... [more ▼]

The present study of monzodiorite, quartz monzodiorite, monzonite, quartz syenite, granodiorite, and rapakivi-like granite surrounding the Suwalki, Ketrzyn and Sejny anorthosite, norite and gabbro plutons or forming separate bodies in northern Poland and southern Lithuania, has resulted in the recognition of a specific suite with AMCG affinity. The bodies belonging to the Mazury and Veisiejai complexes are aligned to E-W trending lineaments in southern Lithuania and northern Poland with a continuation through the Baltic Sea into south-central Sweden in the west and into NW Belarus in the east. The rocks of the suite form a continuous series ranging from 45 to 75% SiO2 with no indication of the classical Daly gap between mafic and felsic rocks. The Mazury and Veisiejai complexes chemically belong to the ferro-potassic alkali-calcic type of rocks and are comparable with the AMCG suite, e.g. in Rogaland, southern Norway. The most acidic varieties of the granitoids approach the classic rapakivi granites in their petrogenetic characteristics, elevated contents of incompatible elements and REE, and hence have A-type affinities. The granitoids are assigned to the 'Post-collisional Granite' field. The overall evolution from mafic to acidic rocks is characterized by well-defined trends which most probably represent a liquid line of descent. Fractional crystallization with or without assimilation and hybridization can account for the continuous evolution from mafic to acidic members. The formation of the suite is concentrated in the timespan covering almost 50 Myr from 1.55 to 1.5 Ga. The most felsic rocks yield ages of ca. 1.5 Ga, which are very similar to the Kabehai granites further east in southeastern Lithuania. Cooling and local mylonitization proceeded until 1.4 Ga (hornblende and biotite Ar-40/Ar-39 ages). The Mazury and Veisiejai complexes are new evidence that anorthosites and related rocks can be linked to large lithospheric discontinuities. A thick crust and a Moho offset on the recent EUROBRIDGE geophysical profiles could indicate that a slab of lower crustal rock has been melted under the Suwalki massif to produce the AMCG rocks. Recent structural and kinematic observations indicate predominating transpressional/compressional regimes. (C) 2003 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailFerroelectricity and tetragonality in ultrathin PbTiO3 films
Lichtensteiger, C.; Triscone, J. M.; Junquera, J. et al

in Physical Review Letters (2005), 94

The evolution of tetragonality with thickness has been probed in epitaxial c-axis oriented PbTiO3 films with thicknesses ranging from 500 down to 24 Angstrom. High resolution x ray pointed out a ... [more ▼]

The evolution of tetragonality with thickness has been probed in epitaxial c-axis oriented PbTiO3 films with thicknesses ranging from 500 down to 24 Angstrom. High resolution x ray pointed out a systematic decrease of the c-axis lattice parameter with decreasing film thickness below 200 Angstrom. Using a first-principles model Hamiltonian approach, the decrease in tetragonality is related to a reduction of the polarization attributed to the presence of a residual unscreened depolarizing field. It is shown that films below 50 Angstrom display a significantly reduced polarization but still remain ferroelectric. [less ▲]

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See detailFerroelectricity in PbTiO3 thin films: A first principles approach
Rabe, K. M.; Ghosez, Philippe ULg

in Journal of Electroceramics (2000), 4(2-3), 379-383

The ground-state ferroelectric distortion of PbTiO3 thin films is studied using a first-principles effective Hamiltonian to describe the structural energetics at a microscopic level. Under short-circuit ... [more ▼]

The ground-state ferroelectric distortion of PbTiO3 thin films is studied using a first-principles effective Hamiltonian to describe the structural energetics at a microscopic level. Under short-circuit electrical and zero-stress mechanical boundary conditions, (0 0 1) films as thin as one unit cell are found to support a stable perpendicular polarization. Size effects in the layer-by-layer ferroelectric distortion are discussed. The continuum limit of the first-principles effective Hamiltonian has the same form as the widely-used Landau-Ginzburg expression for the free energy near T-c, so that the present results can be directly related to those of previous phenomenological studies. In particular, a microscopic interpretation of the extrapolation length delta is proposed. [less ▲]

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See detailFerroelectricity in ultrathin film capacitors
Lichtensteiger, C.; Zubko, P.; Stengel, M. et al

in Oxide Ultrathin Films: Science and Technology (2012)

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See detailFerrokinetic measurement of erythropoiesis.
Beguin, Yves ULg; Stray, S. M.; Cazzola, M. et al

in Acta Haematologica (1988), 79(3), 121-6

Ferrokinetic measurements have proved useful because of the dominant role of the erythron in tissue iron uptake. Detailed measurements of the plasma iron disappearance curve coupled with in vivo counting ... [more ▼]

Ferrokinetic measurements have proved useful because of the dominant role of the erythron in tissue iron uptake. Detailed measurements of the plasma iron disappearance curve coupled with in vivo counting have defined the major pathways of iron utilization and early refluxes of iron into plasma. Recent studies have disclosed two separate plasma kinetic pools consisting of mono- and diferric transferrin, and have demonstrated the effect of their relative abundance on tissue iron uptake. Allowance for the amount of each has made possible the calculation of iron-bearing transferrin uptake, which is independent of plasma iron concentration as long as receptors are saturated. This refinement permits the measurement of functional erythron transferrin receptors, and thereby the relative number of immature erythroid cells. [less ▲]

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See detailFerrokinetic study of splenic erythropoiesis: relationships among clinical diagnosis, myelofibrosis, splenomegaly, and extramedullary erythropoiesis.
Beguin, Yves ULg; Fillet, Georges ULg; Bury, J. et al

in American Journal of Hematology (1989), 32(2), 123-8

Splenic erythropoiesis was demonstrated by surface counting of 59Fe in 129 of 1,350 ferrokinetic studies performed over a 15 year period. These 129 studies were carried out in 108 patients, including 40 ... [more ▼]

Splenic erythropoiesis was demonstrated by surface counting of 59Fe in 129 of 1,350 ferrokinetic studies performed over a 15 year period. These 129 studies were carried out in 108 patients, including 40 with chronic myelogenous leukemia (CML), 24 with agnogenic myeloid metaplasia (AMM), 18 with polycythemia vera (PV), six with a myelodysplastic syndrome, five with acute leukemia, three with prostate or breast carcinoma, two each with aplastic anemia or Hodgkin's disease, and one each with idiopathic thrombocythemia, multiple myeloma, chronic renal failure, or treated hypopituitarism. Splenomegaly was present in 83% of the studies and hepatomegaly in 72%. Grade II-III myelofibrosis was demonstrated in 62% of the cases. Hepatic erythropoiesis was present in 77% of the studies (only 38% in PV), and marrow erythropoiesis was undetectable in 33%. Total erythropoiesis was about twice normal (range 0.2 to 8 times normal) but was ineffective to varying degrees in 86% of the studies. Relationships between organomegaly, myelofibrosis, and extramedullary erythropoiesis, as well as differences among clinical disorders, are discussed. Differences observed between CML in chronic or blastic phase suggested that the erythroid cell line was involved in the proliferative process. It is concluded that splenic erythropoiesis 1) is encountered in a variety of clinical conditions; 2) is not necessarily associated with splenomegaly or myelofibrosis, even in the myeloproliferative disorders; 3) is part of a predominantly extramedullary (in the liver as well as in the spleen), expanded, and largely inefficient total erythropoiesis; and 4) can be evaluated in a semiquantitative manner by surface counting. [less ▲]

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See detailFerrorosemaryite, NaFe2+Fe3+Al(PO4)3, a new phosphate mineral from the Rubindi pegmatite, Rwanda.
Hatert, Frédéric ULg; Lefèvre, Pierre; Fransolet, André-Mathieu ULg et al

in European Journal of Mineralogy (2005), 17

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See detailFers et bois dans les combles médiévaux et modernes du sud de la Belgique. Contribution à l'histoire de la construction en Europe occidentale
Maggi, Christophe ULg

Doctoral thesis (2014)

After four years of doctoral research on the topic of iron in the roof framing, a detailed typologic timeline could be established. It covers the period between the thirteenth and eighteenth century. The ... [more ▼]

After four years of doctoral research on the topic of iron in the roof framing, a detailed typologic timeline could be established. It covers the period between the thirteenth and eighteenth century. The development of such an inventory was possible by the development of an interdisciplinary methodology combining dendrochronology, archaeometallurgy and techniques of building archeology. Reflections and comparisons crossed with nearly 750 armatures from the investigation of 68 roof or attic parts, mainly located in Wallonia, helped to inventory 89 differents frames iron models. [less ▲]

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See detailLa fertilisation des plantes de grandes cultures
Falisse, André; Bodson, Bernard ULg; Cors, François et al

in Fertilisation des plantes (1985, December)

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See detailFertilisation des plantes de grandes cultures.
Falisse, André ULg; Bodson, Bernard ULg; Cors, François et al

in Annales de Gembloux (1986), 92(3), 233-245

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See detailFertilité des sols, agriculture durable de conservation pour préserver la planète
Mergeai, Guy ULg; Aloni Komanda, Jules

in La voix du Congo profond, le magazine d'un congo rural en marche (2010)

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See detailLa fertilité et la biodiversité dans les sols
Genot, Valérie ULg; Colinet, Gilles ULg; Bock, Laurent ULg

in Delbeuck, C. (Ed.) Rapport analytique sur l'état de l'environnement wallon 2006-2007 (2007)

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See detailFertilite male chez les bovins et taux sanguin d'hormone luteinisante et de testosterone.
Renaville, Robert ULg; Delecour, Beatrice; Ettaib, A. et al

in Bulletin des Recherches Agronomiques de Gembloux (1980), 15(4), 333-348

We determined blood plasma testosterone (T) values in bulls from the Friesian (N) and the Belgian White Blue (BBB) breeds, between 1 and 12 months of age. The BBB breed is divided into 2 sub-breeds: one ... [more ▼]

We determined blood plasma testosterone (T) values in bulls from the Friesian (N) and the Belgian White Blue (BBB) breeds, between 1 and 12 months of age. The BBB breed is divided into 2 sub-breeds: one is highly specialized for meat production (BBB-V); the other has mixed zootechnic characteristics (BBB-M). The results obtained show that T values in PN are significantly higher than in BBB-V, for at least, the first 5 months of life. In a second experiment, we followed T profiles for 12 or 24 hours in PN, BBB-M and BBB-V bulls. Every 20 minutes, blood was withdrawn from the jugular vein through a catheter, in order to minimized stress. Data observes are as follows: (1) Luteinizing hormone (LH) plasma levels are comparable in all animals at 130 and 180 days. From then on, average LH values slightly decreased in BBB-V whilst they increase in PN. As early as 130 days, LH secretion shows successive pulses in BBB-V, a similar pulsatile profile appearing later on in PN. (2) Average T values are significantly higher in PN and BBB-M than in BBB-V. T profiles are flat but of increasing average level up to 140 days in PN and 170 days in BBB-V. Thereafter, pulses develop. (3) 24 hour profiles show no influence of daylight upon LH or T parameters. (4) T peaks follow LH peaks by a delay of 60 to 100 minutes. (5) Frequency and amplitude of LH and T peaks differ, on the same day, among two monozygous twins. A third experiment showed that LH and T profiles were similar in two adult BBB-V bulls with significantly different fertility grades. We hypothesize that the delay of sexual maturing frequently observed in sub-breeds highly selected for meat production (BBB-V, for exemple) is related to the delay shown by animals of these breeds to develop T pulsatile profiles with peaks of adequate frequency and amplitude. [less ▲]

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