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 detailLife-Dairyclim, European project aiming to mitigate methane emissions and carbon footprint of dairy cows
Lessire, Françoise ULiege; Bernard, Maxime; Reding, Romain et al

in Höglind, Mats; Bakken, Anne Kjersti; Hovstad, Knut Anders (Eds.) et al The multiple roles of grassland in the European bioeconomy (2016, September 04)

How can dairy farming contribute to reduce the climate change without compromising food security and farm economy? This is the question the project Life-Dairyclim wants to answer. The project gathers ... [more ▼]

How can dairy farming contribute to reduce the climate change without compromising food security and farm economy? This is the question the project Life-Dairyclim wants to answer. The project gathers partners from research groups, association of advisory services to farmers and feed industry in collaboration with private farmers in three countries (Belgium, Luxembourg and Denmark). It focuses on production of feed, including utilisation of grassland and feeding of dairy cows in order to implement strategies that can contribute to a sustainable development of the dairy sector. Feeding experiments to decrease methane from dairy cows will be assessed at the University of Liège (Belgium) with cows milked by an automatic milking system. Methane production will be analysed individually by a device (Guardian®) inserted in the feeding bin as well as by mid infrared spectrum analysis of milk. The effect of concentrate composition on methane production during grazing in combination with optimization of grazing practices will be studied in collaboration with the industrial partner, Dumoulin (Belgium). The carbon footprint of produced milk will be determined using lifecycle assessment methods based on input from the experiments in combination with effect of feed production on especially carbon sequestration from different type of crop and utilization by Aarhus University (Denmark) and Convis, association of advisory services to farmers (Luxembourg). An important part of the project is dissemination based on pilot farms in all three countries documenting the impact of mitigation strategies adopted during the project [less ▲]

Detailed reference viewed: 61 (8 ULiège)
Full Text
Peer Reviewed
See detailLifestyle Behaviours and Plasma Vitamin C and β-Carotene Levels from ELAN Population (Liège, Belgium)
PINCEMAIL, Joël ULiege; Vanbelle, Sophie ULiege; Degrune, Fabien et al

in Journal of Nutrition and Metabolism (2011), 2011

Several factors, including fruit and vegetables intakes, have been shown to significantly influence the plasma concentrations of the two antioxidants vitamin C and β-carotene. Deficiency levels of 6 mg/L ... [more ▼]

Several factors, including fruit and vegetables intakes, have been shown to significantly influence the plasma concentrations of the two antioxidants vitamin C and β-carotene. Deficiency levels of 6 mg/L (34.2 μM) for vitamin C and of 0.22 mg/L (0.4 μM) for β-carotene have been suggested below which cardiovascular risk might be increased. The present study performed on 897 presumably healthy subjects aged 40–60 years aimed to examine how modifiable lifestyle factors may be related to vitamin C and/or β-carotene deficiency. Gender, smoking, lack of regular physical activity and of daily fruit consumption (≥2/day), and social status (in particular, unemployment) were found to be significant risk factors for vitamin C deficiency. For β-carotene deficiency, the same factors were identified except social status; moreover, overweight and OC use in women were also found to have a deleterious effect. For non exposed subjects, the probability of developing vitamin C deficiency was 4% in men and 2.4% in women. This probability increased to 66.3% for men and to 44.3% for women (and even to 50.4% under OC use), when all risk factors were present. For β-carotene deficiency, the corresponding probabilities were equal to 29.7% in men and 13.7% in women (no risk factor present), and to 86.1% for men and 69.9% (91.6% for OC use) for women (all factors present), respectively [less ▲]

Detailed reference viewed: 121 (42 ULiège)
Full Text
Peer Reviewed
See detailLifestyle factors and serum androgens among 636 middle aged men from seven countries in the European Prospective Investigation into Cancer and Nutrition (EPIC).
Suzuki, Reiko; Allen, Naomi E.; Appleby, Paul N. et al

in Cancer causes & control : CCC (2009), 20(6), 811-21

OBJECTIVE: To evaluate the association between lifestyle and dietary factors and serum concentrations of androgens in middle-aged healthy men. METHODS: We conducted a cross-sectional analysis of the ... [more ▼]

OBJECTIVE: To evaluate the association between lifestyle and dietary factors and serum concentrations of androgens in middle-aged healthy men. METHODS: We conducted a cross-sectional analysis of the association of lifestyle factors with circulating concentrations of androstenedione (A-dione), 3-alpha-androstanediol glucuronide (A-diol-g), testosterone (T), SHBG (sex hormone-binding globulin), and free testosterone (FT) among 636 men in the European Prospective Investigation into Cancer and Nutrition. RESULTS: Compared with the youngest age group (40-49 years), the oldest (70-79 years) had a higher mean concentration of SHBG (by 44%) and lower mean concentrations of A-diol-g (by 29%) FT (19%). Men in the highest BMI group (> or =29.83 kg/m(2)) had a higher mean A-diol-g concentration (by 38%) and lower mean concentration of T (by 20%) SHBG (29%) compared with the lowest (<24.16 kg/m(2)). Current smokers had higher mean concentrations of T (by 13%), SHBG (14%), and A-dione (15%) compared with never smokers. Physical activity and dietary factors were not associated with androgen concentrations, although men in the highest fifth of alcohol intake had higher mean concentrations of A-dione (by 9%), FT (11%) compared with the lowest. CONCLUSION: Our results suggest that age, body weight, smoking, and alcohol intake are associated with circulating androgen concentrations in men. [less ▲]

Detailed reference viewed: 38 (5 ULiège)
Full Text
Peer Reviewed
See detailLifetime absolute risk of hip and other osteoporotic fracture in Belgian women.
Hiligsmann, Mickaël ULiege; Bruyère, Olivier ULiege; Ethgen, Olivier ULiege et al

in BONE (2008), 43(6), 991-4

OBJECTIVES: To estimate the lifetime absolute risks of hip and other osteoporotic fracture in Belgian women aged 60 years and to examine the effect of changes in baseline population fracture risk and ... [more ▼]

OBJECTIVES: To estimate the lifetime absolute risks of hip and other osteoporotic fracture in Belgian women aged 60 years and to examine the effect of changes in baseline population fracture risk and changes in life expectancy. MATERIALS AND METHODS: Estimates were performed using a Markov microsimulation model and were based on the incidence of first fracture as well as life expectancy. Baseline scenario included projected mortality rates and increasing fracture incidence by 1% per year. Alternative scenarios were performed on age, life expectancy and trends in fracture incidence. Lifetime fracture risk for osteoporotic population (T-score <or= -2.5) was also estimated. RESULTS: In the baseline scenario, lifetime absolute risks of hip fracture and of any major osteoporotic fracture (hip, clinical vertebral or wrist) were respectively 24.8% and 44.3%. Alternative scenarios showed that when assuming no change of age-specific fracture rates over time, these lifetime risks were 18.3% and 35.2%, while these values were 20.0% and 38.3% assuming no future mortality reductions. For osteoporotic women, these values were respectively 34.5% and 51.5%. CONCLUSION: We conclude that absolute lifetime fracture risks are substantial and that trends in fracture incidence and changes in life expectancy have a marked impact on absolute lifetime fracture risks. [less ▲]

Detailed reference viewed: 54 (12 ULiège)
Full Text
Peer Reviewed
See detailLifetime and Landé factor measurements of 5p7p levels of Sn I by time-resolved laser spectroscopy
Zhang, Y.; Xu, J.; Zhang, W. et al

in Physical Review. A (2008), 78

Lifetimes for nine levels and Landé gJ factors for eight levels of the 5p7p configuration of neutral tin have been measured by the time-resolved fluorescence method and by the Zeeman quantum beat ... [more ▼]

Lifetimes for nine levels and Landé gJ factors for eight levels of the 5p7p configuration of neutral tin have been measured by the time-resolved fluorescence method and by the Zeeman quantum beat technique, respectively. A two-step laser excitation technique has been used for the measurements. The results obtained are compared with relativistic Hartree-Fock lifetime and gJ values taking core-polarization effects into account. [less ▲]

Detailed reference viewed: 59 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime and transition probability determination in xenon ions - The cases of XeVII and XeVIII
Biémont, Emile ULiege; Clar, Mathieu ULiege; Fivet, V. et al

in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2007), 44(1), 23-33

Radiative lifetimes have been calculated for 15 levels of Xe VII belonging to the configurations 5s5p, 5p(2), 5s5d, 5s6s, 5p5d, 4f5p, 5p5d and 5s5f and for 4 levels of the 5p and 5d configurations of Xe ... [more ▼]

Radiative lifetimes have been calculated for 15 levels of Xe VII belonging to the configurations 5s5p, 5p(2), 5s5d, 5s6s, 5p5d, 4f5p, 5p5d and 5s5f and for 4 levels of the 5p and 5d configurations of Xe VIII. A relativistic Hartree-Fock approach including core-polarization effects, on the one hand, and a purely relativistic multiconfiguration Dirac-Fock method, on the other hand, have been used for the calculations. The accuracy of the present set of results has been assessed through comparisons with radiative lifetime measurements obtained by beam-foil spectroscopy. A good agreement between theory and experiment is observed for most of the levels. A new set of transition probabilities is proposed for 169 transitions of Xe VII and 45 transitions of Xe VIII. [less ▲]

Detailed reference viewed: 32 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime and transition probability determinationin Xe IX
Garnir, Henri-Pierre ULiege; Enzonga Yoca, S.; Quinet, Pascal ULiege et al

in Journal of Quantitative Spectroscopy & Radiative Transfer (2009), 110

A new set of transition probabilities is proposed for Xe IX.They have been calculated by two different theoretical approaches i.e. a fully relativistic multiconfiguration Dirac–Fock (MCDF) method and a ... [more ▼]

A new set of transition probabilities is proposed for Xe IX.They have been calculated by two different theoretical approaches i.e. a fully relativistic multiconfiguration Dirac–Fock (MCDF) method and a partly relativistic Hartree–Fock (HFR) approach takingcore-polarization effects in to account. Their accuracy has been evaluated through comparisons with lifetimeme asurements for 11 levels performed using beams of Xeþ ions produced by a 2 MVV an de Graaff accelerator. The agreement theory-experimentis nice for most of the levels and gives more weight to the theoretical models used for the calculations and, consequently,to the new transition probabilities [less ▲]

Detailed reference viewed: 31 (1 ULiège)
Peer Reviewed
See detailLifetime calculations in Yb II
Biémont, Emile ULiege; Dutrieux, J.-F.; Martin, I. et al

in Journal of Physics : B Atomic Molecular & Optical Physics (1998), 31

Detailed reference viewed: 32 (1 ULiège)
Full Text
Peer Reviewed
See detailLifetime Measurement by Beam-Foil Spectroscopy
Garnir, Henri-Pierre ULiege; Bastin, Thierry ULiege; Dumont, Paul-Dominique ULiege

in Phys. Scr. (1996), T65

The beam-foil source can produce spectra of almost every ion and allows easy measurement of atomic lifetimes of excited levels. Beam-foil spectra have some unique characteristics that made them valuable ... [more ▼]

The beam-foil source can produce spectra of almost every ion and allows easy measurement of atomic lifetimes of excited levels. Beam-foil spectra have some unique characteristics that made them valuable tool for the term analysis of highly charged ions. As an example, we will describe the work undertaken at Liège on Ne IV and Ne V. Beam-foil is still the only general method for measuring the lifetime of atomic levels in highly charged ions. However, the accuracy of the classical beam-foil method is limited by the non-selective broadband excitation in the foil that populates almost all excitation levels up to very high energy and corrupts by cascading phenomena the normal single-exponential decay curves. We will describe some techniques that have been invented to obviate this infamous “cascading effect”, especially the beam-foil-laser spectroscopy method recently developed in our laboratory. We will present an overview of the beam-foil spectroscopy research performed at the University of Liège together with other recent trends in the field of fast-beam spectroscopy. [less ▲]

Detailed reference viewed: 42 (3 ULiège)
See detailLifetime measurement of the 2p3d 3P2 level in N II by beam-foil-laser spectroscopy
Bastin, Thierry ULiege; Baudinet-Robinet, Y.; Dumont, Paul-Dominique ULiege et al

Poster (1992)

Detailed reference viewed: 7 (3 ULiège)
See detailLifetime measurement of the 2p3d 3P2 level in N II by beam-foil-laser spectroscopy
Bastin, Thierry ULiege; Baudinet-Robinet, Y.; Biémont, Emile ULiege et al

Poster (1992)

Detailed reference viewed: 21 (4 ULiège)
Full Text
Peer Reviewed
See detailLifetime measurements and calculated transition probabilities in WIII
Palmeri, P.; Quinet, Pascal ULiege; Fivet, V. et al

in Physica Scripta (2008), 78

New experimental lifetimes for two levels in doubly ionized tungsten, W III, have been obtained using the time-resolved laser-induced-fluorescence technique. Theoretical oscillator strengths obtained from ... [more ▼]

New experimental lifetimes for two levels in doubly ionized tungsten, W III, have been obtained using the time-resolved laser-induced-fluorescence technique. Theoretical oscillator strengths obtained from a HFR calculation including the effects of core-polarization are reported for all transitions from levels below E < 70 000 cm−1 and with log g f > −2, thus greatly extending our knowledge of the radiative data in W III. Good agreement is found between the calculated lifetimes and the experimental values from this and previous works. These new results fill a gap in the available data for this ion which is expected to play an important role in fusion reactors. [less ▲]

Detailed reference viewed: 19 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime measurements and calculations in singly ionized ytterbium
Biémont, Emile ULiege; Quinet, Pascal ULiege; Dai, Z. W. et al

in Journal of Physics B-Atomic Molecular and Optical Physics (2002), 35(22), 4743-4749

New radiative lifetimes, measured by time-resolved laser-induced fluorescence spectroscopy, are reported for five Rydberg states of singly ionized ytterbium. Free Yb+ ions were produced in a laser-induced ... [more ▼]

New radiative lifetimes, measured by time-resolved laser-induced fluorescence spectroscopy, are reported for five Rydberg states of singly ionized ytterbium. Free Yb+ ions were produced in a laser-induced plasma. The experimental results have been compared with HFR calculations, taking core-polarization effects into account, and a good agreement (within 25%) between theory and experiment is observed for four levels. HFR results are also proposed for np (n less than or equal to 7) and nf (n less than or equal to 8) Rydberg states and compared with available data. [less ▲]

Detailed reference viewed: 24 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime measurements and calculations in Y+ and Y2+ ions
Biémont, Emile ULiege; Blagoev, K; Engström, L et al

in Monthly Notices of the Royal Astronomical Society (2011), 414

Detailed reference viewed: 14 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime measurements and transition probabilities in Mo II
Lundberg, H; Engström, L; Hartman, H et al

in Journal of Physics : B Atomic Molecular & Optical Physics (2010), 43

Detailed reference viewed: 16 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime measurements and transition probability calculations in singly ionized tungsten (WII)
Nilsson, H.; Engström, L.; Lundberg, H. et al

in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2008), 49

New measurements of radiative lifetimes for 9 levels in singly ionized tungsten (Wii) have been performed with the time-resolved laser-induced-fluorescence technique. Transition probabilities have been ... [more ▼]

New measurements of radiative lifetimes for 9 levels in singly ionized tungsten (Wii) have been performed with the time-resolved laser-induced-fluorescence technique. Transition probabilities have been obtained from a combination of experimental lifetimes and theoretical branching fractions. The reliability of the present results is assessed through the good agreement observed between the calculated lifetimes and the experimental values from this work and from previous publications. These new results fill in a gap in the available data for this atomic species particularly important for fusion reactors. [less ▲]

Detailed reference viewed: 24 (0 ULiège)
Full Text
Peer Reviewed
See detailLifetime measurements for doubly ionized uranium
Biémont, Emile ULiege; Palmeri, P.; Quinet, Pascal ULiege et al

in Journal of Physics B-Atomic Molecular and Optical Physics (2002), 35(7), 1701-1705

The first lifetime measurements for doubly ionized uranium are reported in the present work. They relate to five levels belonging to the configurations 5f(2)6d(2), 5f(2)6d7s and 5f(3)7p and have been ... [more ▼]

The first lifetime measurements for doubly ionized uranium are reported in the present work. They relate to five levels belonging to the configurations 5f(2)6d(2), 5f(2)6d7s and 5f(3)7p and have been obtained with a time-resolved laser-induced-fluorescence technique, the ions being produced by laser ablation of a uranium oxide target. [less ▲]

Detailed reference viewed: 22 (0 ULiège)
Peer Reviewed
See detailLifetime Measurements for the 4p2P° and 5p2P° Levels and calculation of Transition Probabilities in Na I
Lowe, R. M.; Biémont, Emile ULiege

in Journal of Physics : B Atomic Molecular & Optical Physics (1994), 27

Detailed reference viewed: 19 (1 ULiège)
Peer Reviewed
See detailLifetime measurements in odd-parity Rydberg series of neutral Lead by time-resolved laser spectroscopy
Li, Z. S.; Svanberg, S.; Biémont, Emile ULiege et al

in Physical Review. A (1998), 57

Detailed reference viewed: 9 (1 ULiège)