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See detailHeat can erase epigenetic marks of vernalization in Arabidopsis
Bouché, Frédéric ULiege; Detry, Nathalie ULiege; Périlleux, Claire ULiege

in Plant Signaling & Behavior (2015), 10(3), 990799

Vernalization establishes a memory of winter that must be maintained for weeks or months in order to promote flowering the following spring. The stability of the vernalized state varies among plant ... [more ▼]

Vernalization establishes a memory of winter that must be maintained for weeks or months in order to promote flowering the following spring. The stability of the vernalized state varies among plant species and depends on the duration of cold exposure. In Arabidopsis thaliana, winter leads to epigenetic silencing of the floral repressor gene FLOWERING LOCUS C (FLC) and the duration of cold is measured through the dynamics of chromatin modifications during and after cold. The growing conditions encountered post-vernalization are thus critical for the maintenance of the vernalized state. We reported that high temperature leads to devernalization and, consistently, to FLC reactivation in Arabidopsis seedlings. Here we show that the repressive epigenetic mark H3K27me3 decreases at the FLC locus when vernalized seedlings are grown at 30°C, unless they were first exposed to a stabilizing period at 20°C. Ambient temperature thus controls the epigenetic memory of winter. [less ▲]

Detailed reference viewed: 113 (28 ULiège)
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See detailHeat conduction
Fraeijs de Veubeke, Baudouin ULiege; Hogge, Michel ULiege

Report (1972)

Detailed reference viewed: 18 (1 ULiège)
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See detailHeat conduction at micro and nanoscales: A review through the prism of Extended Irreversible Thermodynamics
Lebon, Georgy ULiege

in Journal of Non-Equilibrium Thermodynamics (2014), 39(1), 35-59

Detailed reference viewed: 15 (1 ULiège)
See detailHeat generation and transfer due to friction and plastic dissipation - a coupled thermomechanical approach
Adam, Laurent; Ponthot, Jean-Philippe ULiege

in Proceedings of HEFAT 2003, 2nd International conference on Heat Transfer, Fluid Mechanics and Thermodynamics (2003)

Detailed reference viewed: 43 (1 ULiège)
See detailHeat generation due to friction and plastic dissipation – a coupled thermomechanical approach for impact and metal forming simulation
Adam, Laurent; Ponthot, Jean-Philippe ULiege

in Proceedings of Int. Conf. on Computational Methods for Coupled Problems in Science and Engineering – COUPLED PROBLEMS 2005 (2005)

Detailed reference viewed: 81 (1 ULiège)
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See detailA heat injection and pumping experiment in a gravel aquifer monitored with crosshole electrical resistivity tomography
Hermans, Thomas ULiege; Wildemeersch, Samuel ULiege; Jamin, Pierre ULiege et al

in EarthDoc - Near Surface Geosciences 2013 - 19th European Meeting of Environmental and Engineering Geophysics (2013, September)

Thermal tracing experiments are becoming common in hydrogeology to estimate parameters governing heat transport processes and to study geothermal reservoirs. Electrical resistivity tomography (ERT) has ... [more ▼]

Thermal tracing experiments are becoming common in hydrogeology to estimate parameters governing heat transport processes and to study geothermal reservoirs. Electrical resistivity tomography (ERT) has proven its ability to monitor salt tracer tests, but few studies have investigated its performances in thermal tracing experiments. In this study, we monitor the injection and pumping of heated water using crosshole ERT in a panel crossing the main flow direction. Difference inversion time-lapse images clearly show the heterogeneous pattern of resistivity changes, and thus temperature changes, highlighting the existence of preferential flow paths in the aquifer. Comparison of temperature estimates from ERT and direct measurements in boreholes show the ability of ERT to quantify the temperatures in the aquifer and to draw the breakthrough curves of the thermal tracer with a relative accuracy. Such resistivity data may provide important information to improve hydrogeological models. Our study proves that ERT, especially crosshole ERT, is a reliable tool to follow thermal tracing experiments. It also confirms that ERT should be included to in situ techniques to characterize heat transfer in the subsurface and to monitor geothermal resources exploitation. [less ▲]

Detailed reference viewed: 59 (27 ULiège)
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See detailA heat piloted residential 5 kW fuel cell
Lilien, Jean-Louis ULiege; Maréchal, François; Lerson, Sébastien et al

(2004, August)

based on residential house demand (electrical, heating, domestic hot water), the optimisation of the use of a SOFC fuel cell of about 5 kWe is detailed to reduce CO2 emission at their minimum.

Detailed reference viewed: 47 (2 ULiège)
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See detailHeat Pumping and Reversible Air Conditioning - First Case Study Results
Aparecida Silva, Cleide; Bertagnolio, Stéphane ULiege; Hannay, Jules et al

Conference (2007, April)

Detailed reference viewed: 147 (4 ULiège)
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See detailHeat pumping and reversible air conditioning : how to make the best use of HVAC equipment ?
Bertagnolio, Stéphane ULiege; Lebrun, Jean ULiege; Andre, Philippe ULiege et al

Conference (2008)

Substituting a heat pump to a boiler may save more than 50% of primary energy, if electricity is produced by a modern combined cycle power plant (and even more if a part of that electricity is produced ... [more ▼]

Substituting a heat pump to a boiler may save more than 50% of primary energy, if electricity is produced by a modern combined cycle power plant (and even more if a part of that electricity is produced using renewable sources). Two of the most attractive heat pumps applications consist in recovering the heat rejected by the condenser of an existing chiller and in using this chiller in reversible mode. This is the topic of the IEA-ECBCS Annex 48 project (“Heat pumping and reversible air conditioning”). An overview of the project is presented and the work of the different participants is briefly explained. Case studies are also briefly presented and more details are given on one of them. [less ▲]

Detailed reference viewed: 62 (4 ULiège)
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See detailHeat Pumping and Reversible Air Conditioning: How to make the best use of HVAC equipment ?
Bertagnolio, Stéphane ULiege; Lebrun, Jean ULiege; Andre, Philippe ULiege et al

in Proceedings of the 9th International IEA Heat Pump Conference, Zurich, Switzerland (2008, May)

Detailed reference viewed: 71 (15 ULiège)
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See detailHeat Pumping and Reversible Air Conditioning: Retrofit opportunities in a laboratory building
Aparecida Silva, Cleide; Bertagnolio, Stéphane ULiege; Hannay, Jules et al

Conference (2007, September)

Detailed reference viewed: 158 (10 ULiège)
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See detailHeat pumping and reversible air-conditioning : a new project of the international energy agency.
Afjei, Th.; Andre, Philippe ULiege; Halozan, H. et al

in Bertoldi, Paolo; Atanasiu, Bogdan (Eds.) Proceeding of the international conference IEECB'06 (2006)

Detailed reference viewed: 24 (3 ULiège)
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See detailHeat recovery and reversible heat pumping potentials in non-residential buildings
Bertagnolio, Stéphane ULiege; Lebrun, Jean; Andre, Philippe ULiege et al

Conference (2008, September)

Detailed reference viewed: 34 (6 ULiège)
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See detailHEAT RECOVERY SYSTEMS FOR PASSENGERS VEHICLES
Glavatskaya, Yulia ULiege; Olivier, Gérard; Shonda, Osoko et al

in Scientific Bulletin, Automotive series = Buletin Ştiinţific, Seria Autovehicule Rutiere (2011, November 02)

is wasted through the cooling liquid and the exhaust gases. Thus, it would be possible to convert this wasted heat in order to improve the engine overall efficiency and reduce the fuel consumption of the ... [more ▼]

is wasted through the cooling liquid and the exhaust gases. Thus, it would be possible to convert this wasted heat in order to improve the engine overall efficiency and reduce the fuel consumption of the vehicle. This shows the big interest in energy recovery systems. This paper presents the various systems enabling the recovery of this energy. A Rankine cycle, widely used in the industry, is of particular interest. The efficiency of energy conversion varies from 5 to 20 % depending of its conception (working fluid, architecture, coupling…). Moreover, the layout of the Rankine cycle integrated within a vehicle depends on the choice of the working fluid as well as the technologies of the components i.e. the expander, the evaporator, the condenser and the pump. Within this context, the issue regarding the mass and the size of the system has to be considered. Finally, we present several solutions of Rankine systems for passenger car application and show each advantage and limits. [less ▲]

Detailed reference viewed: 88 (5 ULiège)
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See detailHeat shock increases the activity of endothelial nitric oxide synthase via HSP90-independent mechanisms
Plumier, Jean-Christophe ULiege; Salomone, Salvatore; Qiu, Janhua et al

Poster (2002)

Detailed reference viewed: 3 (0 ULiège)
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See detailHeat Shock Proteins ans antioxidative enzymes in myocardial protection
Currie, R.W.; Plumier, Jean-Christophe ULiege

in Knowlton, A.A. (Ed.) Heat Shock Proteins and the Cardiovascular System (1996)

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See detailHeat shock proteins. I : Classification and roles in pathological processes
Wirth, Delphine; Gustin, Pascal ULiege; Drion, Pierre ULiege et al

in Annales de Médecine Vétérinaire (2002), 146(4), 201-216

All living systems have evolved mechanisms to maintain homeostasis in the face of rapid environmental changes. When exposed to elevated temperatures, most of the cells activate the synthesis of a specific ... [more ▼]

All living systems have evolved mechanisms to maintain homeostasis in the face of rapid environmental changes. When exposed to elevated temperatures, most of the cells activate the synthesis of a specific group of proteins called Heat Shock Proteins (Hsps). This heat shock response, under control of specific transcription factors, the Heat Shock factors (HSF), is an evolutionarily conserved mechanism, from bacteria to humans. Heat Shock Proteins are classified into families according to their molecular weight (Hsp 25, 40, 70, 90, 105). They play the role of molecular chaperones by binding and protecting other molecules (proteins, RNAs). The function of Hsp is to prevent accumulation of non-native proteins either by assisting proper folding of polypeptides or by driving them to proteosome pathway for degradation. Hsps are involved in various pathological processes that are accompanied by protein alterations such as chronic or degenerative diseases. This review describes structural and functional characteristics of the six main Hsps classes. It also focuses on their respective role in highly studied pathologies. The diversity of Hsps implications in these diseases explains that they became recently a strategic target in development of new therapeutic strategies. [less ▲]

Detailed reference viewed: 129 (5 ULiège)
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See detailThe Heat Shock Response and Tissue Protection
Currie, R.W.; Plumier, Jean-Christophe ULiege

in Baxter, B.F.; Yellon, D.M. (Eds.) Delayed Preconditioning and Adaptative Cardioprotection (1998)

Detailed reference viewed: 23 (1 ULiège)
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See detailHeat shock RNAs in leaf and root explants of wheat.
Du Jardin, Patrick ULiege; Lejour, C.; Jacquemin, J. M.

in Plant Physiology and Biochemistry (Paris) (1990), 28(2),

Detailed reference viewed: 9 (0 ULiège)
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See detailHeat shock stimulation of a tilapia heat shock protein 70 promoter is mediated by a distal element
Molina, Alfredo; Di Martino, Emmanuel; Martial, Joseph ULiege et al

in Biochemical Journal (2001), 356(Pt 2), 353-9

We reported previously that a tilapia (Oreochromis mossambicus) heat shock protein 70 (HSP70) promoter is able to confer heat shock response on a reporter gene after transient expression both in cell ... [more ▼]

We reported previously that a tilapia (Oreochromis mossambicus) heat shock protein 70 (HSP70) promoter is able to confer heat shock response on a reporter gene after transient expression both in cell culture and in microinjected zebrafish embryos. Here we present the first functional analysis of a fish HSP70 promoter, the tiHSP70 promoter. Using transient expression experiments in carp EPC (epithelioma papulosum cyprini) cells and in microinjected zebrafish embryos, we show that a distal heat shock response element (HSE1) at approx. -800 is predominantly responsible for the heat shock response of the tiHSP70 promoter. This element specifically binds an inducible transcription factor, most probably heat shock factor, and a constitutive factor. The constitutive complex is not observed with the non-functional, proximal HSE3 sequence, suggesting that both factors are required for the heat shock response mediated by HSE1. [less ▲]

Detailed reference viewed: 109 (7 ULiège)