Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailMinkowski space structure of the Higgs potential in 2HDM
Ivanov, Igor ULg

in Physical Review. D : Particles and Fields (2007), 75

The Higgs potential of 2HDM keeps its generic form under the group of transformation GL(2,C), which is larger than the usually considered reparametrization group SU(2). This reparametrization symmetry ... [more ▼]

The Higgs potential of 2HDM keeps its generic form under the group of transformation GL(2,C), which is larger than the usually considered reparametrization group SU(2). This reparametrization symmetry induces the Minkowski space structure in the orbit space of 2HDM. Exploiting this property, we present a geometric analysis of the number and properties of stationary points of the most general 2HDM potential. In particular, we prove that charge-breaking and neutral vacua never coexist in 2HDM and establish conditions when the most general explicitly CP-conserving Higgs potential has spontaneously CP-violating minima. We also define the prototypical model of a given 2HDM, which has six free parameters less than the original one but still contains all the essential physics. Our analysis avoids manipulation with high-order algebraic equations. [less ▲]

Detailed reference viewed: 19 (0 ULg)
Full Text
Peer Reviewed
See detailMinkowski space structure of the Higgs potential in the two-Higgs-doublet model. II. Minima, symmetries, and topology
Ivanov, Igor ULg

in Physical Review. D : Particles and Fields (2008), 77

We continue to explore the consequences of the recently discovered Minkowski space structure of the Higgs potential in the two-Higgs-doublet model. Here, we focus on the vacuum properties. The search for ... [more ▼]

We continue to explore the consequences of the recently discovered Minkowski space structure of the Higgs potential in the two-Higgs-doublet model. Here, we focus on the vacuum properties. The search for extrema of the Higgs potential is reformulated in terms of 3-quadrics in the 3+1-dimensional Minkowski space. We prove that 2HDM cannot have more than two local minima in the orbit space and that a twice-degenerate minimum can arise only via spontaneous violation of a discrete symmetry of the Higgs potential. Investigating topology of the 3-quadrics, we give concise criteria for existence of noncontractible paths in the Higgs orbit space. We also study explicit symmetries of the Higgs potential/Lagrangian and their spontaneous violation from a wider perspective than usual. [less ▲]

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailThe Minkowski-Bouligand dimension and the interior-to-edge ratio of habitats.
Imre, A; Bogaert, Jan ULg

in Fractals (2005), 14(1), 49-53

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailMinocycline attenuates HIV-1 infection and suppresses chronic immune activation in humanized NOD/LtsZ-scidIL-2Rgamma(null) mice.
Singh, Maneesh; Singh, Pratibha; Vaira, Dolores et al

in Immunology (2014), 142(4), 562-72

More than a quarter of a century of research has established chronic immune activation and dysfunctional T cells as central features of chronic HIV infection and subsequent immunodeficiency. Consequently ... [more ▼]

More than a quarter of a century of research has established chronic immune activation and dysfunctional T cells as central features of chronic HIV infection and subsequent immunodeficiency. Consequently, the search for a new immunomodulatory therapy that could reduce immune activation and improve T-cell function has been increased. However, the lack of small animal models for in vivo HIV study has hampered progress. In the current study, we have investigated a model of cord blood haematopoietic progenitor cells (CB-HPCs) -transplanted humanized NOD/LtsZ-scidIL-2Rgamma(null) mice in which progression of HIV infection is associated with widespread chronic immune activation and inflammation. Indeed, HIV infection in humanized NSG mice caused up-regulation of several T-cell immune activation markers such as CD38, HLA-DR, CD69 and co-receptor CCR5. T-cell exhaustion markers PD-1 and CTLA-4 were found to be significantly up-regulated on T cells. Moreover, increased plasmatic levels of lipopolysaccharide, sCD14 and interleukin-10 were also observed in infected mice. Treatment with minocycline resulted in a significant decrease of expression of cellular and plasma immune activation markers, inhibition of HIV replication and improved T-cell counts in HIV-infected humanized NSG mice. The study demonstrates that minocycline could be an effective, low-cost adjunctive treatment to regulate chronic immune activation and replication of HIV. [less ▲]

Detailed reference viewed: 22 (0 ULg)
Full Text
Peer Reviewed
See detailMinor compounds and oxidative stability of mono-varietal virgin olive oils produced in eastern of Morocco
Mansouri, Farid; Benmoumen, Abdessamad; Richard, Gaetan ULg et al

in Food Chemistry (in press)

The aim of this study is to characterize monovarietal virgin olive oils (VOOs) of new high-density plantings system of three cultivars (Arbequina, Arbosana and Koroneiki) which have been recently ... [more ▼]

The aim of this study is to characterize monovarietal virgin olive oils (VOOs) of new high-density plantings system of three cultivars (Arbequina, Arbosana and Koroneiki) which have been recently introduced in the eastern mediterranean region of Morocco. In this study, we have also conducted comparison between those monovarietal VOOs and olive oil of the local olive cultivar Picholine marocaine. Monovarietal VOOs characterization has been carried out by analysing several parameters, including quality index and olive oil stability to oxidation. Significant differences between the analysed olive oils were highlighted. They depend on cultivars and technological conditions of processing. We have noticed that Koroneiki olive oil have higher content of phenols (459.48 mg kg-1) and have the best value of oxidative stability (93.16 h). On the other hand Arbrosana’s VOO has low content of total phenols (260.85 mg kg-1) but it was distinguished by its higher content of alpha-tocopherol (460.07 mg kg-1). In addition, ten phenolic compounds present in virgin olive oils, were identified and quantitatively assessed by HPLC. Hydroxytyrosol, tyrosol, luteoline, pinoresinol and apigenin were the main phenolic compounds in those analyzed monovarietal VOOS. [less ▲]

Detailed reference viewed: 53 (14 ULg)
See detailUne minorité à la recherche d'elle-même: les Belges germanophones de 1945 à 1973
Brüll, Christoph ULg

Conference given outside the academic context (2015)

Detailed reference viewed: 35 (3 ULg)
See detailMinorité et tutelle
Deguel, François ULg

in Leleu, Yves-Henri (Ed.) Chroniques notariales (2010)

Detailed reference viewed: 27 (3 ULg)
See detailMinorité prolongée, interdiction et conseil judiciaire: les dernières années
Leleu, Yves-Henri ULg

in Leleu, Yves-Henri (Ed.) Les incapacités (2003)

Detailed reference viewed: 128 (8 ULg)
Full Text
Peer Reviewed
See detailMinorités deleuziennes et politiques linguistiques
Petteni, Oriane ULg

Conference (2011, February)

Detailed reference viewed: 15 (1 ULg)
See detailMinorities in European Cities: The Dynamics of Social Integration and Social Exclusion at the Neighbourhood Level
Martiniello, Marco ULg; Body-Gendrot, Sophie

Book published by MacMillan & St. Martin's Press (2000)

Detailed reference viewed: 484 (2 ULg)
Peer Reviewed
See detailMinority Nationalism and European Integration - P. Lynch
Martiniello, Marco ULg

in Nations & Nationalism (1997), 4(3), 476-478

Detailed reference viewed: 56 (0 ULg)
Peer Reviewed
See detailMinority Rights in Europe de H. Miall (ed)
Martiniello, Marco ULg

in Ethnic and Racial Studies (1996), 19(2), 446-447

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailMiombo Woodlands : an endangered forest ecosystem in periurban areas of the southeastern cities of Democratic Republic of Congo
Hick, Aurélie ULg; Kizila Wimana, Pacifique; Tooth, Martin et al

Poster (2015, November 26)

Detailed reference viewed: 23 (1 ULg)
Peer Reviewed
See detailA miospore assemblage at the Siluro-Devonian boundary from the Tawil Formation, Qatif Field, Saudi Arabia
Steemans, Philippe ULg; Al-Ruwaili, M.; Filatoff, J. et al

Conference (2001)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailMiospore assemblages from the Silurian-Devonian boundary, in borehole A1-61, Ghadamis Basin, Libya
Rubinstein, C.; Steemans, Philippe ULg

in Review of Palaeobotany and Palynology (2002, April), 118(1-avr Sp. Iss. SI), 397-421

Well preserved and diversified miospore assemblages have been recorded from a relatively continuous sequence in borehole A1-61 which spans the Silurian-Devonian boundary in the northwestern part of the ... [more ▼]

Well preserved and diversified miospore assemblages have been recorded from a relatively continuous sequence in borehole A1-61 which spans the Silurian-Devonian boundary in the northwestern part of the Ghadamis Basin, Libya. The sequence is represented by early Devonian Lochkovian beds of the Tadrart Formation that transgress onto the Silurian Ludlow-Pridoli beds of the upper part of the 'Alternances Argilo-greseuses' Formation. The present work demonstrates a succession of miospore assemblages from closely sampled layers that have been stratigraphically dated as Ludlow-middle Pridoli and early Lochkovian by chitinozoans and acritarchs. Over 80 species of cryptospores and trilete spores have been identified. Modified detailed morphological interpretations are given. The miospore assemblages are correlated with miospore zonation schemes established for the type sequences of the Welsh Borderland, and those previously described from Libya. Early occurrences of some species as Streelispora newportensis on the western Gondwana plate, are put forward by comparison with the Old Red Sandstone continent. Phytogeographic and palaeobotanic implications based on these observations are discussed. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

Detailed reference viewed: 51 (6 ULg)
Full Text
Peer Reviewed
See detailMiospore Biozonation in the Middle Devonian - Lower Carboniferous of Europe : its application to Western Gondwana
Loboziak, S.; Streel, Maurice ULg

in Anais da Academia Brasileira de Ciencias (1995), 67(3), 311-312

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailMiospore contribution to the Upper Famennian-Strunian event stratigraphy
Streel, Maurice ULg

in Annales de la Société Géologique de Belgique (1986), 109(1), 75-92

Detailed reference viewed: 22 (2 ULg)
Full Text
Peer Reviewed
See detailMiospore evidence for pre-Emsian and latest Famennian sedimentation in the Devonian of the Paraná Basin, South Brazil
Loboziak, S; Goncalves De Melo, JH; Steemans, Philippe ULg et al

Conference (1995)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailMiospore Evolution from the Ordovician to the Silurian
Steemans, Philippe ULg

in Review of Palaeobotany and Palynology (2000, December), 113(1-3), 189-196

The definition of the term cryptospore is amended to include only spores thought to be produced by embryophytes and to exclude all enigmatic palynomorphs. Cryptospores are included here in the miospore ... [more ▼]

The definition of the term cryptospore is amended to include only spores thought to be produced by embryophytes and to exclude all enigmatic palynomorphs. Cryptospores are included here in the miospore group.The oldest published assemblage of typical cryptospores is Llanvirn in age. The evolution of cryptospore assemblages is very slow from the Llanvirn to the early Llandovery. The Telychian and Sheinwoodian stages are periods of drastic impoverishment in cryptospore biodiversity, followed by an important modification in miospore assemblages. This step in the evolution of the vegetation is correlated with the rapid transgression of seas on the continent during the early Llandovery. On the other hand, the Hirnantian glaciation does not affect diversity of the miospore assemblages. [less ▲]

Detailed reference viewed: 44 (6 ULg)