Search results for: A. Boivin

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Mars methane analogue mission: Mission simulation and rover operations at Jeffrey Mine and Norbestos Mine Quebec, Canada

A. Qadi, E. Cloutis, C. Samson, L. Whyte, more

Advances in Space Research > 2015 > 55 > 10 > 2414-2426

The Canadian Space Agency (CSA), through its Analogue Missions program, supported a microrover-based analogue mission designed to simulate a Mars rover mission geared toward identifying and characterizing methane emissions on Mars. The analogue mission included two, progressively more complex, deployments in open-pit asbestos mines where methane can be generated from the weathering of olivine into...

article

Albumine humaine comme traitement adjuvant du sepsis et du choc septique : mythe et réalité

J. Boisramé-Helms, A. Boivin, X. Delabranche, F. Meziani

Médecine Intensive Réanimation > 2014 > 23 > 2 > 148-158

Résumé L’albumine est une macromolécule de forme monocaténaire, très soluble, à charge négative, pouvant se lier aux cations et aux anions. C’est une protéine multifonctionnelle, qui joue un rôle essentiel dans la physiologie et la détoxification, notamment par sa spécificité de ligand et sa capacité à lier un grand nombre de substances endogènes ou exogènes, comme les médicaments. L’albumine humaine...

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Comparaison du bloc infraclaviculaire échoguidé à injection unique au bloc axillaire échoguidé à injection double : une étude prospective, randomisée, contrôlée à simple insu

A. Boivin, M.-J. Nadeau, S. Lévesque, N. Dion, more

Annales francaises d'anesthesie et de reanimation > 2013 > 32 > Supplement 1 > A100-A101

article

Electromagnetic induction sounding and 3D laser imaging in support of a Mars methane analogue mission

A. Boivin, P. Lai, C. Samson, E. Cloutis, more

Planetary and Space Science > 2013 > 82-83 > Complete > 27-33

The Mars Methane Analogue Mission simulates a micro-rover mission whose purpose is to detect, analyze, and determine the source of methane emissions on the planet's surface. As part of this project, both an electromagnetic induction sounder (EMIS) and a high-resolution triangulation-based 3D laser scanner were tested at the Jeffrey open-pit asbestos mine to identify and characterize geological environments...

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Measuring the prevalence of chronic diseases using population surveys by pooling self-reported symptoms, diagnosis and treatments: results from the World Health Survey of 2003 for South Asia

J.-F. Levesque, S. Mukherjee, D. Grimard, A. Boivin, more

International Journal of Public Health > 2013 > 58 > 3 > 435-447

Objectives Measuring disease prevalence poses challenges in countries where information systems are poorly developed. Population surveys soliciting information on self-reported diagnosis also have limited capacity since they are influenced by informational and recall biases. Our aim is to propose a method to assess the prevalence of chronic disease by combining information on self-reported diagnosis,...

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990 IL-6 Induced Increase in Intestinal Epithelial Tight Junction Permeability is Mediated by AP-1 Induced Up-Regulation of Claudin-2 Gene Activity

Dongmei Ye, Wanli Lei, Rana Al-Sadi, Michel A. Boivin, more

Gastroenterology > 2012 > 142 > 5 Supplement 1 > S-175

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Granzyme B contributes to extracellular matrix remodeling and skin aging in apolipoprotein E knockout mice

Paul R. Hiebert, Wendy A. Boivin, Thomas Abraham, Sara Pazooki, more

Experimental Gerontology > 2011 > 46 > 6 > 489-499

Apolipoprotein E knockout (apoE-KO) mice have been utilized for decades as a model of atherosclerosis. However, in addition to atherosclerosis, apoE-KO mice develop extensive cutaneous xanthomatosis, accelerated skin aging and frailty when fed a high fat diet. Granzyme B (GrB) is a pro-apoptotic serine protease that has recently been shown to exhibit extracellular proteolytic activity in certain pathologies...

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Activation of caspase‐3 in the skeletal muscle during haemodialysis

Michel A. Boivin, Shadi I. Battah, Elizabeth A. Dominic, Kamyar Kalantar‐Zadeh, more

European Journal of Clinical Investigation > 40 > 10 > 903 - 910

Eur J Clin Invest 2010; 40 (10): 903–910 AbstractBackground and Objective Muscle atrophy in end‐stage renal disease (ESRD) may be due to the activation of apoptotic and proteolytic pathways. We hypothesized that activation of caspase‐3 in the skeletal muscle mediates apoptosis and proteolysis during haemodialysis (HD).Materials and Methods Eight ESRD patients were studied before (pre‐HD) and during...

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Perforin-Independent Extracellular Granzyme B Activity Contributes to Abdominal Aortic Aneurysm

Ciara M. Chamberlain, Lisa S. Ang, Wendy A. Boivin, Dawn M. Cooper, more

The American Journal of Pathology > 2010 > 176 > 2 > 1038-1049

Granzyme B (GZMB) is a serine protease that is abundantly expressed in advanced human atherosclerotic lesions and may contribute to plaque instability. Perforin is a pore-forming protein that facilitates GZMB internalization and the induction of apoptosis. Recently a perforin-independent, extracellular role for GZMB has been proposed. In the current study, the role of GZMB in abdominal aortic aneurysm...

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Granzyme B and perforin in atherosclerosis and skin pathologies

Wendy A. Boivin, Rani P. Cruz, Hongyan Zhao, Tyler Varnals, more

Matrix Biology > 2008 > 27 > Supplement 1 > 40

article

II. Herbicide capillary and gravity-driven transient flows

F. Bartoli, A. Boivin, M. Schiavon

Geoderma > 2006 > 136 > 3-4 > 494-503

A disc infiltrometer with a disc diameter of 80 mm has been operated in the field at −0.2 kPa a few days after the spring of 2003 spraying of a mixture of bentazone and isoproturon on three dried tilled topsoils differing in texture but under the same climatic and vegetation conditions. In the first part of this series of papers, we characterized the transient water flow, allowing us to study the...

article

I. Water capillary and gravity-driven transient flows: A preliminary examination

F. Bartoli, A. Boivin, M. Schiavon

Geoderma > 2006 > 135 > Complete > 269-283

A disc infiltrometer with a disc diameter of 80 mm has been operated in the field at −0.2 kPa few days after the Spring 2003 spraying of a mixture of bentazone and isoproturon on three dried tilled topsoils differing in texture but under the same climatic and vegetation conditions. We have derived both infiltration parameters from the disc infiltrometer records and capillary invasion parameters from...

article

Prednisolone protects against TNF-A induced disturbance of intestinal epithelial tight junction barrier

Thomas Y. Ma, Jehad Barakat, Neil H. Hoa, Luis Acosta-Mondragon, more

Gastroenterology > 2003 > 124 > 4 Supplement 1 > A315

article

Mechanism of mesalamine protection against TNF-A induced increase in Caco-2 intestinal epithelial tight junction permeability

Thomas Y. Ma, Neil T. Hoa, Michel A. Boivin, Jehad Barakat, more

Gastroenterology > 2003 > 124 > 4 Supplement 1 > A324

article

Equal aspiration rates in gastrically and transpylorically fed critically ill patients

Jan Esparza, Michel A. Boivin, Michael F. Hartshorne, Howard Levy

Intensive Care Medicine > 2001 > 27 > 4

Abstract. Objectives: To determine the difference in aspiration rates between gastrically and transpylorically fed patients in the intensive care unit. Design: A prospective controlled study of critically ill patients randomized to receive either a gastrically placed feeding tube or a transpylorically placed feeding tube. Setting: University teaching hospital's medical intensive care unit. The study...

article

Equal aspiration rates in gastrically and transpylorically fed critically ill patients

Jan Esparza, Michel A. Boivin, Michael F. Hartshorne, Howard Levy

Intensive Care Medicine > 2001 > 27 > 4 > 660-664

Objectives: To determine the difference in aspiration rates between gastrically and transpylorically fed patients in the intensive care unit. Design: A prospective controlled study of critically ill patients randomized to receive either a gastrically placed feeding tube or a transpylorically placed feeding tube. Setting: University teaching hospital's medical intensive care unit. The study...

article

One-to-one correspondence between the two genetic units and the tandemly duplicated transcriptional units of the polyhomeotic locus of Drosophila

A. Boivin, M.-O. Fauvarque, J.-M. Dura

Molecular Genetics and Genomics > 1999 > 261 > 1 > 196-200

Abstractpolyhomeotic (ph) is a complex locus in Drosophila defined by two genetic units. Two mutational events are necessary to obtain the null lethal phenotype. Molecular analysis has shown that the ph locus contains two transcriptional units coding for two very similar proteins. Although a strong argument in favor of a strict correlation between the genetic and molecular units can be constructed,...

article

Symptomatic hypocalcemia from oral sodium phosphate: a report of two cases

Michel A. Boivin, Susan R. Kahn

The American Journal of Gastroenterology > 1998 > 93 > 12 > 2577-2579

The use of oral sodium phosphate has, only in very rare instances (seven cases in the literature), been recognized to cause symptomatic hypocalcemia. We report a case in an elderly woman that led to severe tetany and a 10-day admission to control the electrolyte disturbances. The patient was predisposed to developing this complication because of chronic renal failure and vitamin D deficiency. The...

article

An Example in Tangential Meromorphic Approximation

A. Boivin, A.H. Nersessian

Journal of Approximation Theory > 1996 > 87 > 1 > 103-111

It is known that all sets of meromorphic uniform approximation inCwhich satisfy an additional condition involving the Gleason parts of the algebraR(K) are then also sets of tangential approximation by meromorphic functions. In this paper, we construct a set which, although it is a set of tangential approximation, does not satisfy this extra condition on parts and, thus, showing that the condition...

article

Gibbs free energies of formation of amorphous Si ₂ O ₃ , SiO and Si ₂ O

M. Nagamori, J.-A. Boivin, A. Claveau

Journal of Non-Crystalline Solids > 1995 > 189 > 3 > 270-276

A thermodynamic methodology was put forward to assess the standard heats of formation and absolute entropies of silicon oxides, based on various thermal behaviors such as decomposition temperatures. The standard heats of formation at 298 K thus calculated are 1345.53, 426.08 and 342.84 kJ/mol for Si ₂ O ₃ (am), SiO(am) and Si ₂ O(am), respectively. The standard entropies obtained...

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