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See detailInvestigation on the Delay Time of Coal Experiment by Laser-Induced Breakdown Spectroscopy
Li, Jie ULg; Lu, Jidong; Xie, Chengli et al

in Spectroscopy and Spectral Analysis (2008), 28(4), 736-739

Laser-induced breakdown spectroscopy is a new technology of elementary analysis , and it will be used in coal analysis. The delay time of signal is an important parameter of spectral analysis. A LIBS ... [more ▼]

Laser-induced breakdown spectroscopy is a new technology of elementary analysis , and it will be used in coal analysis. The delay time of signal is an important parameter of spectral analysis. A LIBS system was set up and three kinds of coal (Jiangxipingxiang coal , Shanxixishan coal and Guizhoupingzhai coal) were chosen for this investigation. The spectra in the range of 240 to 250 nm and 275 to 290 nm of the each three coal samples are shown and they record several spect ral lines of components such as C , Mg and Si according to the NIST database. The temporal evolution of SNR of spectral line was obtained , and the value of SNR increased with the time delay , then decayed. The temporal evolution of SNR was different as the coal , element and spectral line differs. Finally, optimum delay time of each spectral lines of element s in the coal samples was calculated according to the biggest value of signal-to-noise ratio , and the relation between the characteristic of coal , element, spectral line and the optimum delay time was analyzed. [less ▲]

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See detailQuantitative analysis of laser induced carbon plasma by intensity ratio calibration
Yao, Shunchun; Lu, Jidong; Xie, Chengli et al

in High Power Laser and Particle Beams (2008), 20(7), 1089-1092

Samples were excited by pulse laser and plasma was formed at atmospheric pressure.The technique of laser induced breakdown spectroscopy(LIBS)was applied to analyzing the carbon content in the samples.The ... [more ▼]

Samples were excited by pulse laser and plasma was formed at atmospheric pressure.The technique of laser induced breakdown spectroscopy(LIBS)was applied to analyzing the carbon content in the samples.The matrix element Si was selected as internal standard,calibration curves were drawn respectively using the peak intensity of carbon line and the intensity ratio of carbon line and silica line.The fitting degree of two different calibration curves,signal reproducibility and the accuracy of calibrated values were analyzed.The results of the analysis show that the intensity ratio method seems more adequate than the peak intensity method for establishing the calibration cures. [less ▲]

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See detailQuantitative analysis of lead in soil by laser-induced breakdown spectroscopy
Li, Yong; Lu, Jidong; Lin, Zhaoxiang et al

in Journal of Applied Optics (2008), 29(5), 789-792

Fast quantitative analysis of lead in the simulated soil made of chemical reagents (PbC12,SiO2,CaCO3 and KBr)was carried out with the laser—induced breakdown spectroscopy. The result shows that the ... [more ▼]

Fast quantitative analysis of lead in the simulated soil made of chemical reagents (PbC12,SiO2,CaCO3 and KBr)was carried out with the laser—induced breakdown spectroscopy. The result shows that the signal—to—noise ratio increases and then decreases with the time delay. The calibration curves of Pb content were constructed with the spectrogram acquired in experiments.It is found by the investigation that the average relative error of the method for the fast quantitative analysis of lead in soil is 8.33 and the minimum detection limit is 89 ug/g. The experimental result proves LIBS is capable of being used in the detection of lead in soil. [less ▲]

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See detailMatrix Effect on Laser Induced Breakdown Spectroscopy of Fine Coal
Xie, Chengli; Lu, Jidong; Li, Jie ULg et al

in Journal of Engineering Thermophysics (2008), 29(2), 331-334

The feasibility of laser—induced breakdown spectroscopy as a diagnostic tool for elementary analysis was documented widely,as well as the matrix effect of target material was proved to be remarkable ... [more ▼]

The feasibility of laser—induced breakdown spectroscopy as a diagnostic tool for elementary analysis was documented widely,as well as the matrix effect of target material was proved to be remarkable impact on the spectral analysis. The influence of physical characteristics of fine coal,including particle size and area density,on the emission spectrum was surveyed,such as spectral intensity,standard deviation of characteristic spectrum and the detection threshold.An intense laser radiation with a wavelength of 1064 nm was used to ablate fine coal to form plasma plume,and the emission spectrum emitted as the plasma cooling of was analyzed by high—resolution echelle grating spectrometer coupled to intensified CCD camera.The results suggest that moderate particle size and material density are more advantageous to quantitative analysis of coal by laser—induced breakdown spectroscopy than the smallest or biggest size,which can be interpretable by heat—transfer mechanism in target after a shot of laser pulse. [less ▲]

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See detailMeasurement of carbon content in coal with laser—induced breakdown spectroscopy
Li, Ping; Lu, Jidong; Xie, Chengli et al

in Journal of Applied Optics (2008), 28(6), 756-759

The feasibility of rapid quantitative analysis of coal by Laser—Induced Breakdown Spectroscopy technique was studied.The calibration curve method for LIBS quantitative analysis is introduced.Five coal ... [more ▼]

The feasibility of rapid quantitative analysis of coal by Laser—Induced Breakdown Spectroscopy technique was studied.The calibration curve method for LIBS quantitative analysis is introduced.Five coal samples were selected as investigation subjects,the carbon plasma line of 505.2 nm was chosen as analysis spectrum line,and the carbon content of coal was analyzed quantitatively with delay of 0.8us, 1.2us, 1.6 us, 2.0 us and 2.4us. The results were compared with the results measured with Element Analysis Instrument.The error measured in1.6us delay was the minimum ,the effect of delay time on the quantitative analysis was analyzed.The results indicate that LIBS has a great potential in fast analysis of coal content. [less ▲]

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See detailThe murid herpesvirus-4 gH/gL binds to glycosaminoglycans.
Gillet, Laurent ULg; Colaco, Susanna; Stevenson, Philip G

in PLoS ONE (2008), 3(2), 1669

The first contact a virus makes with cells is an important determinant of its tropism. Murid Herpesvirus-4 (MuHV-4) is highly dependent on glycosaminoglycans (GAGs) for cell binding. Its first contact is ... [more ▼]

The first contact a virus makes with cells is an important determinant of its tropism. Murid Herpesvirus-4 (MuHV-4) is highly dependent on glycosaminoglycans (GAGs) for cell binding. Its first contact is therefore likely to involve a GAG-binding virion glycoprotein. We have previously identified two such proteins, gp70 and gp150. Gp70 binds strongly to GAGs. However, deleting it makes little difference to MuHV-4 cell binding or GAG-dependence. Deleting gp150, by contrast, frees MuHV-4 from GAG dependence. This implies that GAGs normally displace gp150 to allow GAG-independent cell binding. But the gp150 GAG interaction is weak, and so would seem unlikely to make an effective first contact. Since neither gp70 nor gp150 matches the expected profile of a first contact glycoprotein, our understanding of MuHV-4 GAG interactions must be incomplete. Here we relate the seemingly disconnected gp70 and gp150 GAG interactions by showing that the MuHV-4 gH/gL also binds to GAGs. gH/gL-blocking and gp70-blocking antibodies individually had little effect on cell binding, but together were strongly inhibitory. Thus, there was redundancy in GAG binding between gp70 and gH/gL. Gp150-deficient MuHV-4 largely resisted blocks to gp70 and gH/gL binding, consistent with its GAG independence. The failure of wild-type MuHV-4 to do the same argues that gp150 is normally engaged only down-stream of gp70 or gH/gL. MuHV-4 GAG dependence is consequently two-fold: gp70 or gH/gL binding provides virions with a vital first foothold, and gp150 is then engaged to reveal GAG-independent binding. [less ▲]

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See detailDetection of Heavy Metal Elements in Fume by Laser-Induced Breakdown Spectroscopy
Lin, Zhaoxiang; Li, Jie ULg; Liu, Linmei et al

in Chinese Journal of Lasers (2008), 35(12), 338-340

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See detailIngenierie tissulaire du parenchyme renal : une hypothese therapeutique ?
JOURET, François ULg; Pirson, Yves

in Medecine Sciences : M/S (2008), 24(6-7), 561-3

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See detailThe Murid Herpesvirus-4 gL regulates an entry-associated conformation change in gH.
Gillet, Laurent ULg; Colaco, Susanna; Stevenson, Philip G

in PLoS ONE (2008), 3(7), 2811

The glycoprotein H (gH)/gL heterodimer is crucial for herpesvirus membrane fusion. Yet how it functions is not well understood. The Murid Herpesvirus-4 gH, like that of other herpesviruses, adopts its ... [more ▼]

The glycoprotein H (gH)/gL heterodimer is crucial for herpesvirus membrane fusion. Yet how it functions is not well understood. The Murid Herpesvirus-4 gH, like that of other herpesviruses, adopts its normal virion conformation by associating with gL. However, gH switched back to a gL-independent conformation after virion endocytosis. This switch coincided with a conformation switch in gB and with capsid release. Virions lacking gL constitutively expressed the down-stream form of gH, prematurely switched gB to its down-stream form, and showed premature capsid release with poor infectivity. These data argue that gL plays a key role in regulating a gH and gB functional switch from cell binding to membrane fusion. [less ▲]

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See detailApport pour le restaurateur des ouvrages anciens traitant d'architecture
Gilles, Isabelle ULg

in Actes du LVe Congrès de la Fédération des Cercles d'Archéologie et d'Histoire de Belgique (2008)

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See detailLa peinture du XVe et du début du XVIe siècle dans les collections publiques de Liège
Allart, Dominique ULg

Book published by Centre "Primitifs flamands" (2008)

Ce sixième volume de la collection « Répertoires » éditée par le Centre "Primitifs flamands" rassemble des dossiers d’expertise sur quarante-quatre tableaux liégeois ou flamands du XVe et du début du XVIe ... [more ▼]

Ce sixième volume de la collection « Répertoires » éditée par le Centre "Primitifs flamands" rassemble des dossiers d’expertise sur quarante-quatre tableaux liégeois ou flamands du XVe et du début du XVIe siècle, conservés dans les collections publiques de Liège, au Grand Curtius, au Trésor de la Cathédrale, à l’église Sainte-Croix et à l’Université (collection Wittert). Parmi eux, on retrouvera des joyaux comme la "Vierge à l’Enfant avec sainte Marie-Madeleine et une donatrice" du Maître à la Vue de Sainte-Gudule, la "Vierge à l’Enfant" peinte par Pieter Coeck vers 1535. Parmi les pièces retenues figurent aussi des témoignages de l’histoire locale, comme la fameuse "Vierge au papillon" (Trésor de la Cathédrale de Liège), miraculeusement rescapée du sac de la ville par les troupes de Charles le Téméraire en 1468, et le "Diptyque Palude" (Grand Curtius), réalisé à la fin du XVe siècle pour Henri ex Palude, chantre de la Cathédrale Saint-Lambert. Une douzaine d’œuvres léguées à l’Université de Liège par le baron Adrien Wittert, en 1903, font aussi l’objet d’une étude détaillée. Il faut malheureusement déplorer l’état de conservation médiocre de certains des tableaux étudiés. L’un des objectifs de l’auteur est de sensibiliser les responsables de ce patrimoine à la nécessité d’en assurer plus efficacement la sauvegarde, et d’en confier les soins à des mains expertes. Abondamment illustré, ce luxueux ouvrage offre aux spécialistes et aux amateurs d’art un commentaire explicatif approfondi, assorti de comparaisons pour chacune des œuvres recensées, et une documentation scientifique et technique pour nombre d’entre elles. [less ▲]

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See detailHautrage (Lower Cretaceous) and Sclayn (Upper Pleistocene) - Field Trip Guide-book.
Damblon, Freddy ULg; Pirson, Stéphane; Gerrienne, Philippe ULg

in Memoirs of the Geological Survey of Belgium (2008), 55

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See detailThe World Health Report 2008 brings Primary Health Care back to business
Porignon, Denis ULg

Scientific conference (2008)

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See detailOn the modelling of compressed long plates related to sheet-section behaviour
Hofmeyer, H.; Jaspart, Jean-Pierre ULg

in Proceedings of the Fifth International Conference on Thin-Walled Structures (2008)

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See detailLes plantes ont-elles un quota de CO2 fixé ?
Périlleux, Claire ULg

Article for general public (2008)

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See detailLe bilinguisme gréco-latin dans les communautés juives d'Italie d'après les inscriptions (IIIe-VIe s. apr. J.-C.)
Rochette, Bruno ULg

in Biville, Frédérique; Decourt, Jean-Claude; Rougemont, Georges (Eds.) Bilinguisme gréco-latin et épigraphie (2008)

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See detailImpact of the plant protection practices on the operators' exposure: survey by the communes and ministry of equipment and transport (MET-RW)
Godeaux, Denis; Schiffers, Bruno ULg; Culot, Marc ULg

in Communications in Agricultural and Applied Biological Sciences (2008)

In order to gain a better understanding of non-agricultural pesticide use and to prepare the legislative and technical dossiers required under the Water Framework Directive, between October 2006 and March ... [more ▼]

In order to gain a better understanding of non-agricultural pesticide use and to prepare the legislative and technical dossiers required under the Water Framework Directive, between October 2006 and March 2007, two surveys were conducted of 97 Walloon communes and 65 districts of the Walloon Ministry of Public Works and Transport (MET) (General Directorates for Motorways and Roads and for Waterway Infrastructure). The questionnaire (26 questions on six topics) was sent by e-mail or fax, with a response rate of 60 out of 97 communes and 33 out of 65 districts. This article describes the health-related aspects of the surveys (environmental aspects are the subject of separate article). The surveys have brought to light a number of bad practices and a growing awareness of the non-agricultural users with respect to health risks. However, bad habits, legislation infringements and a failure to follow good plant protection practice are still a problem and pose major health risks (which endanger the operator and the public). Information, awareness-raising and, especially, training of people therefore remain a priority for nonagricultural users. [less ▲]

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See detailEnvironmental aspects in plant protection practices of non-agricultural pesticide users : case study of communes and the ministry of public works and transport (MET) of the Walloon region (Belgium)
Godeaux, Denis; Schiffers, Bruno ULg; Culot, Marc ULg

in Communications in Agricultural and Applied Biological Sciences (vol. 73) (2008)

In order to gain a better understanding of non-agricultural pesticide use and to prepare the legislative and technical dossiers required under the Water Framework Directive, between October 2006 and March ... [more ▼]

In order to gain a better understanding of non-agricultural pesticide use and to prepare the legislative and technical dossiers required under the Water Framework Directive, between October 2006 and March 2007, two surveys were conducted of 97 Walloon communes and 65 districts of the Walloon Ministry of Public Works and Transport (MET) (General Directorates for Motorways and Roads and for Waterway Infrastructure). The questionnaire (26 questions on six topics) was sent by e-mail or fax, with a response rate of 60 out of 97 communes and 33 out of 65 districts. This article describes the environmental aspects of the surveys (health-related aspects are the subject of separate article). The surveys have brought to light a number of good practices (including zero pesticides) and a growing awareness of environmental issues among non-agricultural users. However, bad habits, legislation infringements and a failure to follow good plant protection practice are still a problem and pose major environmental risks (in the form of water pollution from pesticides). Information, awareness-raising and training therefore remain a priority for nonagricultural users. [less ▲]

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See detailMarine and fresh water palynomorphs from the Jauf Formation, Northwest Saudi Arabia
Miller, A.; Breuer, P.; Al-Ghazi, A. et al

Conference (2008)

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