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Search Results: 1 - 10 of 145879 matches for " Dave Bélanger "
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Leukotrienes inhibit early stages of HIV-1 infection in monocyte-derived microglia-like cells
Jonathan Bertin, Corinne Barat, Dave Bélanger, Michel J Tremblay
Journal of Neuroinflammation , 2012, DOI: 10.1186/1742-2094-9-55
Abstract: To evaluate the role of LTs on HIV-1 infection in the CNS, monocyte-derived microglial-like cells (MDMis) were utilized in this study. Leukotriene-treated MDMis were infected with either fully replicative brain-derived HIV-1 isolates (YU2) or R5-tropic luciferase-encoding particles in order to assess viral production and expression. The efficacy of various steps of the replication cycle was evaluated by means of p24 quantification by ELISA, luciferase activity determination and quantitative real-time polymerase chain reaction (RT-PCR).We report in this study that virus replication is reduced upon treatment of MDMis with LTB4 and LTC4. Additional experiments indicate that these proinflammatory molecules alter the pH-independent entry and early post-fusion events of the viral life cycle. Indeed, LT treatment induced a diminution in integrated proviral DNA while reverse-transcribed viral products remained unaffected. Furthermore, decreased C-C chemokine receptor type 5 (CCR5) surface expression was observed in LT-treated MDMis. Finally, the effect of LTs on HIV-1 infection in MDMis appears to be mediated partly via a signal transduction pathway involving protein kinase C.These data show for the first time that LTs influence microglial cell infection by HIV-1, and may be a factor in the control of viral load in the CNS.Infection of the central nervous system (CNS) by human immunodeficiency virus type 1 (HIV-1) causes neurotoxicity and inflammatory disorders such as encephalitis and associated neurocognitive deficits [1]. Since the introduction of highly active antiretroviral therapy (HAART) as the standard of care for seropositive patients, the incidence of severe neurological complications caused by HIV-1 such as dementia has greatly diminished, but a more subtle form of CNS dysfunction known as minor cognitive and motor disorder has emerged [2]. Although a discordance between cerebrospinal fluid (CSF) and plasma viral load is often observed, sustained virus replicatio
Electrostatic Separation as a Characterizing Tool for the Insulation of Conductive Mineral Particles  [PDF]
Philippe Bébin, Dave Mavrovic, Annie Rochette
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2014, DOI: 10.4236/jmmce.2014.23025
Abstract: This work deals with a non-conventional use of a drum-type electrostatic separator. Indeed, the electrostatic separation process is used as a tool to evaluate the efficiency of different formulations of insulating coatings surrounding coarse and irregular conducting mineral particles. Our analysis is based on the change of the particle’s distribution in the conductive and the non-conductive pans after the electrostatic separation process. Different coating formulations were tested and we found that only hydrophobic components have to be used and that a composite formulation must be considered to sufficiently increase the coating thickness. Viscous hydrophobic oil combined with talc is a particularly relevant coating formulation for insulating hematite or ilmenite particles. The viscosity of the binder plays a crucial role as it guarantees the necessary cohesion of the coating itself. To evaluate the required thickness to obtain efficient insulating capabilities for the coating surrounding coarse and irregular mineral particles, we linked the experimental volume ratio between the coating and the particles and the theoretical ratio. The experimental volume ratio is calculated using the weights of all the materials used and their respective densities. Whereas, the theoretical one is calculated using the volume the mineral particles would have, considering them all identical, spherical, with a smooth surface and the volume of the coating being uniform with the same thickness on each mineral particle. We found that an efficient insulating coating for hematite particles means a thickness of 9.5% of the average mineral radius, ranging from 125 μm to 1250 μm, resulting in an equivalent insulating thickness of about 48 μm for particles of around 1 mm in diameter. Interestingly, all results originate from the analysis of the change occurring in the particle’s distribution in the different collecting pans of an electrostatic separator.
ALGUNOS APUNTES SOBRE LAS RAZONES DE LA REFORMA DEL PROCEDIMIENTO PENAL EN AMéRICA LATINA
Pierre Gilles Bélanger
Prolegómenos. Derechos y Valores , 2010,
Abstract: Actualmente en Latinoamérica, la mayor parte de los países han modificado sus códigos penales con el objeto de tener una mejor salud procesal. En esta transición, hace falta ayuda internacional real, apoyo, colaboración e intercambio de ideas, programas, experiencias, grupos de trabajo, capacitación a nivel bilateral y multilateral dirigida por expertos para los actores en el sistema penal y para la sociedad. Todos los países de Latinoamérica, han tenido éxitos y todos tienen fallas en las reformas procesales desarrolladas en materia penal. Parece entonces oportuno, empezar el dialogo y la colaboración para contribuir a una mejor comprensión y edificación de los sistemas penales y su evolución. Para ello se requiere compartir las experiencias que han funcionado en otros países, adaptándolas al marco jurídico de cada contexto en particular. Por un lado, esto ayuda a mejorar la comprensión operacional del procedimiento penal y por otro lado, el respeto de las garantías jurídicas establecidas en las Cartas Magnas de cada país y por ende estabilidad institucional, seguridad y desarrollo económico para la sociedad.
La réception de la littérature en Acadie : sur quelques débats autour de la critique dans L’évangéline et L’Acadie Nouvelle
David Bélanger
Voix Plurielles , 2012,
Abstract: De la naissance d’une littérature acadienne moderne, au commencement puis au développement de son institutionnalisation, moult querelles, polémiques et escarmouches ont éclaté entre les acteurs du milieu culturel acadien. Cet article tente d’en répertorier les tensions et les enjeux, grace aux outils sociologiques et au savoir littéraire. La querelle de l’Ancien contre les modernes (1963), la querelle du chiac et, plus particulièrement, celle autour du Djibou de Laval Goupil (1975) ainsi que la toute récente querelle du Magazine Nuit Blanche (2009) dévoilent effectivement la morphologie d’un champ littéraire en évolution.
à la croisée des chemins : les premiers chrétiens et leur quête identitaire
Steeve Bélanger
Cahiers des études Anciennes , 2010,
Abstract: Au sein d’une société, les groupes constituent des acteurs sociaux importants. Or, comme tout acteur social, les groupes sont appelés à traverser diverses phases au cours leur existence. à l’intérieur de ce cycle d’évolution, les deux premières phases, soit celle de la formation et de l’identification, sont cruciales pour le processus de construction identitaire. En effet, après s’être assemblé autour d’un noyau fondateur, le groupe prend premièrement conscience de son existence en tant qu’en...
Symmetry breaking and electroweak physics at Photon Linear Colliders
G. Bélanger
Physics , 1995,
Abstract: The physics potential of a high-energy photon collider is reviewed. The emphasis is put on aspects related to the symmetry breaking sector, including Higgs searches and production of longitudinal vector bosons.
Optimal number of users in Co-operative spectrum sensing in WRAN using Cyclo-Stationary Detector
Manish B Dave
Computer Science , 2014,
Abstract: Cognitive radio allows unlicensed users to access licensed frequency bands through dynamic spectrum access so as to reduce spectrum scarcity. This requires intelligent spectrum sensing techniques. This paper investigates the use of cyclo-stationary detector and performance evaluation for Digital Video Broadcast-Terrestrial (DVB-T) signals. Generally, DVB-T is specified in IEEE 802.22 standard in VHF and UHF TV broadcasting spectrum. Simulations results show that implementing co-operative spectrum sensing help in better utilization of resources. The paper further proposes to find number of optimal users in a scenario to optimize the detection probability and makes use of the particle swarm optimization (PSO) technique to find an optimum value of threshold.
Perception of Partner Abuse and Its Impact on Marital Violence from Both Spouses  [PDF]
Claude Bélanger, Cynthia Mathieu, Hélène Brisebois
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.411123
Abstract:

Few studies have investigated bi-directional models of marital violence. Research suggests that female victims are also often perpetrators of violence. Accordingly, some researchers propose that we should test the hypothesis that the victim and perpetrator roles can be played by both men and women. The current study addresses this issue by attempting to understand the effect that perceptions of spousal violence will have on both partners’ level of marital violence. Our objectives were to verify the links between levels of violence and perceptions of violence by both partners, and actual self-reports of each type of violence perpetrated. We verified if self-reports and partner’s reports of violence would differ, if one partner’s abuses would influence the other partner’s abuses, and whether the spouse’s self-reported violence or the other spouse’s perception of that violence had a differential impact on the level of violence perpetrated. Twenty-three couples in which the male partner was undergoing treatment for marital violence took part in the study. Results indicate that for both partners perceptions of partner violence modulate the level of marital violence that is perpetrated. The link between perceptions and violent behaviors appears to explain female marital violence better than that it does for males. Implications based on these results are discussed.

Identification of Potential Species Croton bonplandianum, Sedges and Balanitis aegyptiaca for the Application of Phytoremediation  [PDF]
Pritesh Parmar, Bhaumik Dave, Ketankumar Panchal, R. B. Subramanian
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.46153
Abstract:

Heavy metal contamination to the environment is a serious problem in the developing countries due to anthropogenic activities, a threat needs to remediate to sustain the life on earth, technology includes use of microorganisms and different plant species. In consideration of biomass, phytoremediation is a very useful techniques above all, can be exploit by identification of hyperaccumulator, which accumulates the heavy metal under metal stress condition. In view of constraints of efficient plant species in present study thirty seven different plant species were screened for the identification of heavy metal accumulators. Croton bonplandianum, sedges and Balanites aegyptiaca amongst the all exhibit superior potential of heavy metal accumulation. This is the first report to unravel the heavy metal accumulation property of three different plant species which can be exploited for the bioremediation of heavy metals.

Library Book Rate Awareness Campaign 2007 / Campagne de sensibilisation au Tarif postal des livres 2007
Laura Emery,Annie Bélanger
Partnership : the Canadian Journal of Library and Information Practice and Research , 2007,
Abstract:
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