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See detailThe Evolution Of The Volatile Compounds By Aging, In Apple Vinegar Flavored With Rosmarinus Officinalis L., Using A HS/GC-MS Technique
Truta, Delia-Mihaela ULg; Tofana, Maria; Socaci, Sonia Ancuta

in Journal of Agroalimentary Processes and Technologies (2010), 16(2), 155-158

Apple vinegar, made from apple juice or concentrated apple juice throuth a double fermentation, it’s widely used as a beverage and food preserver in traditional medicine and healthy diets. The apple ... [more ▼]

Apple vinegar, made from apple juice or concentrated apple juice throuth a double fermentation, it’s widely used as a beverage and food preserver in traditional medicine and healthy diets. The apple vinegar used in this study was flavored using 2 methods of extraction for the active principles from Rosmarinus officinalis L.: maceration and ultrasounds. This paper aims for the analysis and identification of the biological active compounds from the flavored vinegar, using a Headspace /Gas Chromatographic – Mass Spectrometry analysis, at the bottling of the process and after a year of aging the vinegar in glass bottles. A various number of volatile compounds, specific to rosemary, were identified in the vinegar also from the beginning of bottling. The volatile compounds ranged during the aging process, but the main ones, that were specific to rosemary, and to the apple vinegar, were the same. [less ▲]

Detailed reference viewed: 19 (4 ULg)
See detailEvolution of time measurement in Astronomy
Biémont, Emile ULg

in Heck, A. (Ed.) Information Handling in Astronomy - Historical Vistas (2003)

Detailed reference viewed: 7 (1 ULg)
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See detailEvolution of Treatment and Investigative Approaches in Sleep Medicine
Ly, Julien; Chellappa, Sarah Laxhmi ULg; MAQUET, Pierre ULg

in Billiard, Michael (Ed.) Sleep Medicine: a comprehensive guide (in press)

Detailed reference viewed: 33 (13 ULg)
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See detailEvolution of vacuum states and phase transitions in the two Higgs doublet model during cooling of the Universe
Ginzburg, Ilya; Ivanov, Igor ULg; Kanishev, Konstantin

in Physical Review. D : Particles and Fields (2010), 81

We consider the evolution of the ground state in the two Higgs doublet model during cooling down of the Universe after the big bang. Different regions in the space of free parameters of this model ... [more ▼]

We consider the evolution of the ground state in the two Higgs doublet model during cooling down of the Universe after the big bang. Different regions in the space of free parameters of this model correspond to different sequences of thermal phase transitions. We discuss different paths of thermal evolution and corresponding evolution of physical properties of the system for different modern values of the parameters. [less ▲]

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See detailEvolution of ventriculo-arterial coupling during acute myocardial ischemia
Kolh, Philippe ULg; D'Orio, Vincenzo ULg; LAMBERMONT, Bernard ULg et al

in European Heart Journal (2001), 22

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See detailEvolution of Western Mediterranean Sea Surface Temperature between 1985 and 2005
Troupin, Charles ULg; Lenartz, Fabian; Sirjacobs, Damien ULg et al

Conference (2009, April 20)

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See detailEvolution of wind behaviour and of its potential for wind power production in Belgium during the last 22 years : a comparison between WRF forced by NCEP2 reanalysis and WRF forced by ERA-INTERIM reanalysis
Doutreloup, Sébastien ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Conference (2011, September 16)

The number of wind turbines in the world grows significantly every year due to politics proposing green energy productions as solutions to mitigate climate change effects. However, this kind of energy is ... [more ▼]

The number of wind turbines in the world grows significantly every year due to politics proposing green energy productions as solutions to mitigate climate change effects. However, this kind of energy is dependent on the weather. This implies that the wind production is irregular at a very short time scale. But the short time scale availability of the wind-based energy is important to the producers of energy as well as to the electric grid managers because the wind energy production can rise or fall rapidly which creates some financial and voltage variations. For these reasons, we study the past evolution of the availability of the wind quantity by analysing the intermittence of the wind speed in Belgium during the last 22 years (1989-2010). To reach this goal, we use the regional model WRF (Weather and Research Forecast model) developed by the UCAR community users. In a first time, the WRF model is forced by the NCEP2 reanalysis outputs to obtain a regionalisation of the weather conditions over a domain centred on Belgium at a resolution of 10 km. This resolution allows to capture the minute-based time scale variability of wind speed and consequently the irregular behaviour of the wind power production. In a second time, the WRF model is forced by the ERA-Interim reanalysis outputs with the same configuration. To obtain a value of the wind intermittence, we calculate the persistence of a wind blowing continuously with a minimum speed of 1 ms-1, then the persistence of a wind blowing continuously with a minimum speed of 2 ms-1, etc. The persistence of the wind speed and its evolution over 22 years are characterised by : (a) the mean wind speed over a fixed period (monthly, seasonally, … ), (b) the mean duration of a wind speed above x ms-1 over the same fixed period and (c) the evolution of (a) and (b) during the studied period. This analysis is made with the outputs of WRF-NCEP2 and with the outputs of WRF-Interim allowing to evaluate the impact of forcing fields into WRF-based wind climatology. [less ▲]

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See detailEvolution of wind behaviour and of its potential for wind power production in Belgium during the last 30 years.
Doutreloup, Sébastien ULg; Fettweis, Xavier ULg; Sacré, Bernard ULg et al

Poster (2011, April 04)

The number of wind turbines in the world grows significantly every year due to politics proposing green energy productions as solutions to mitigate climate change effects. However, this kind of energy is ... [more ▼]

The number of wind turbines in the world grows significantly every year due to politics proposing green energy productions as solutions to mitigate climate change effects. However, this kind of energy is dependent on the weather. This implies that the wind production is irregular at a very short time scale. But the short time scale availability of the wind-based energy is important to the producers of energy as well as to the electric grid managers because the wind energy production can rise or fall rapidly which creates some financial and voltage variations. For these reasons, we study the past evolution of the availability of the wind quantity by analysing the intermittence of the wind speed in Belgium during the last 30 years. To reach this goal, we use the regional model WRF (Weather and Research Forecast model) developed by the UCAR community users. The WRF model is forced by the NCEP2 Reanalysis model to obtain a regionalisation of the weather conditions over a domain centred on Belgium at a spatiotemporal resolution of 10 km and 1 min. This resolution allows to capture the minute-based time scale variability of wind speed and consequently the irregular behaviour of the wind power production. To obtain a value of the wind intermittence, we calculate the persistence of a wind blowing continuously with a minimum speed of 1 ms-1, then the persistence of a wind blowing continuously with a minimum speed of 2 ms-1, etc. The persistence of the wind speed and its evolution over 30 years are characterised by : (a) the mean wind speed over a fixed period (monthly, seasonally, … ), (b) the mean duration of a wind speed above x ms-1 over the same fixed period and (c) the evolution of (a) and (b) during the studied period. This study will show the evolution during the last decades of the wind behaviour in Belgium and its potential for electricity production. [less ▲]

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See detailEvolution on trees: a brief review about the extinctions of species, and the case of genocide in a Darwinistic punctuated equilibrium evolution model
Ausloos, Marcel ULg; Kramer, M.; Vandewalle, Nicolas ULg

in Physica A: Statistical Mechanics and its Applications (1999), 273(1-2), 33-45

Numerical and theoretical investigations of species evolution in presence of extinction rules are recalled in the framework of punctuated equilibrium evolution models. Previous results, on the Bak-Sneppen ... [more ▼]

Numerical and theoretical investigations of species evolution in presence of extinction rules are recalled in the framework of punctuated equilibrium evolution models. Previous results, on the Bak-Sneppen model are mentioned together with extensions taking into account a variable number of species. Conditions for limited growth due to species interactions, external fields, or intrinsic population density conditions have already been considered. An original genocide model is presented as a step towards describing effects due to the extinction of species. Critical exponents for (i) the avalanche distribution. (ii) the teady-state approach, and (iii) the tree size are given. A mean-field approximation is shown to be quite accurate for describing the critical state. The screening of species from the evolution process is not numerically studied. [less ▲]

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See detailEvolution over a 10 year period of the epidemiological profile of 1,726 newly diagnosed HCV patients in Belgium.
Gerard, Christiane ULg; Delwaide, Jean ULg; Vaira, Dolorès ULg et al

in Journal of Medical Virology (2005), 76(4), 503-10

In order to evaluate the future burden of hepatitis C, there is a need to quantify the evolution with time of some crucial parameters such as disease frequency and age, modes of infection and infecting ... [more ▼]

In order to evaluate the future burden of hepatitis C, there is a need to quantify the evolution with time of some crucial parameters such as disease frequency and age, modes of infection and infecting genotypes of patients presenting for the first time at consultation. The yearly evolution of these parameters was analyzed retrospectively in a cohort of 1,726 patients living in Belgium, who were diagnosed as hepatitis C virus (HCV) carriers by polymerase chain reaction (PCR) between 1992 and 2002. The epidemiological profile of HCV patients showed significant changes during this period. The number of new patients increased with time. The proportion of patients under 50 increased linearly at a rate of 3% per year. The rate of newly presenting patients infected by transfusion before 1990 decreased, but only by 2.7% per year. The proportion of intravenous (IV) drug users increased by 2.5% per year. Patients presenting "undefined" risk factors increased by 2.1% per year. Nosocomial acquisition of HCV infection exhibited a disturbing relative stability in time whereas dialysis tended to disappear as a cause of infection. There was a significant linear annual decrease of 2.3% in the frequency of genotype 1b, which was counterbalanced by a significant increase of 0.7% for genotype 1a and 1.1% for genotype 4. Genotypes 2 and 3 did not vary significantly with time. Such figures are useful for evaluating the epidemiological changes of C virus infection and for anticipating the future economical cost of hepatitis C treatment in the next few years. [less ▲]

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See detailEvolution over a 15 year period of the epidemiological profile of 2884 newly diagnosed HCV patients in Belgium.
LOLY, Jean ULg; GERARD, Christiane ULg; VAIRA, Dolorès ULg et al

in Acta Gastro-Enterologica Belgica (2011, March), 74

Detailed reference viewed: 53 (15 ULg)
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See detailEvolution over two years of functional and motor abilities among nursing home residents
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Journal of Frailty & Aging (2014), 3(1), 45

Detailed reference viewed: 11 (3 ULg)
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See detailEvolution over two years of functional and motor abilities among nursing home residents
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Osteoporosis International (2014), 25(2), 121

Detailed reference viewed: 23 (7 ULg)
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See detailEvolution pluviométrique et relation inondations – événements pluvieux au Sénégal
Sene, Souleymane; Ozer, Pierre ULg

in Bulletin de la Société Géographique de Liège (2002), 42

Since the late 1960s, Senegal suffered from the dramatic drought which affected all the Sahel of West Africa. Thirty years later, rainfall amounts well above the 1961-1990 average may announce the end of ... [more ▼]

Since the late 1960s, Senegal suffered from the dramatic drought which affected all the Sahel of West Africa. Thirty years later, rainfall amounts well above the 1961-1990 average may announce the end of this period of aridity. Together with this rainfall increase, floods have been reported in most Senegalese cities in 1999, 2000 and 2001. Because of these floods, many affected areas have been abandoned and stricken population has to be rehoused in precarious conditions. Most analysts consider these floods as a new phenomenon, never observed before, and they are blamed on the exceptional heavy daily rainfall. Analysing the relationship between floods and rainfall events in 1999 et 2000, it appears that rainfall amounts responsible for the beginning of each flood are far to be exceptional. However, the vulnerability of the Senegalese cities facing the risk of flood seems to have increased as a result of urban mismanagement. [less ▲]

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See detailEvolution possible de la PAC à l'horizon 2020. Poursuite du glissement vers "le 2ème pilier", cadrage par rapport à l'OMC. Quels sont les scénarios, les adaptations possibles ?
Burny, Philippe ULg

in Centre wallon de Recherches Agronomiques (Ed.) La 11ème Journée Fourrage Actualités "Comment prendre en compte le long terme dans l'orientation donnée à nos systèmes d'élevages herbagers ?" (2005)

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See detailÉvolution procédurale du statut de l'étranger: constats, défis, propositions
Carlier, Jean-Yves ULg

in Journal des Tribunaux (2011)

Detailed reference viewed: 19 (5 ULg)
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See detailEvolution psychodynamique à moyen terme de la détermination vocationnelle chez le grand adolescent
Stassart, Martine ULg

Doctoral thesis (1995)

Introduction , Conclusions and Defence.

Detailed reference viewed: 59 (13 ULg)
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See detailL'évolution psychodynamique à moyen terme du processus vocationnel chez le grand adolescent. Etudes de cas.
Stassart, Martine ULg

Doctoral thesis (1995)

The author presents a detailed story of six adolescents from 18 to 22 years from the point of view of their evolution in the field of vocational choice.

Detailed reference viewed: 74 (6 ULg)