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1. Laser-Induced Electron Diffraction: Inversion of Photoelectron Spectra for Molecular Orbital Imaging

Author

Puthumpally-Joseph, R., Viau-Trudel, J., Peters, M., Nguyen-Dang, T. T., Atabek, O., and Charron, E.

Subjects
Physics - Atomic Physics, Physics - Chemical Physics, Quantum Physics
Abstract

In this paper, we discuss the possibility of imaging molecular orbitals from photoelectron spectra obtained via Laser Induced Electron Diffraction (LIED) in linear molecules. This is an extension of our work published recently in Physical Review A \textbf{94}, 023421 (2016) to the case of the HOMO-1 orbital of the carbon dioxide molecule. We show that such an imaging technique has the potential to image molecular orbitals at different internuclear distances in a sub-femtosecond time scale and with a resolution of a fraction of an Angstr\"om.

Published
2016
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2. Laser-Induced Electron Diffraction: Alignment Defects and Symmetry Breaking

Author

Nguyen-Dang, T. T., Peters, M., Viau-Trudel, J., Couture-Bienvenue, E., Puthumpally-Joseph, R., Charron, E., and Atabek, O.

Subjects
Quantum Physics
Abstract

The fringe pattern that allows geometrical and orbital structure information to be extracted from LIED spectra of symmetric molecules is shown to reflect a symmetry conservation principle. We show that under a field polarization which preserves certain symmetry elements of the molecule, the symmetry character of the initial wave function is conserved during its time-evolution. We present a symmetry analysis of a deviation from a perfect alignment by decomposing the field into a major, symmetry-determining part, and a minor, symmetry breaking, part. This decomposition leads to a corresponding factorization of the time-evolution operator. The formalism is applied to the analysis of the robustness of LIED readings and inversions with respect to deviations from a perfect perpendicular and parallel alignment of a symmetric ABA triatomic molecule. The results indicate a particularly strong stability of the type of LIED spectra associated with the perpendicular alignment situation.

Published
2016
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3. Inversion of Strong Field Photoelectron Spectra for Molecular Orbital Imaging

Author

Puthumpally-Joseph, R., Viau-Trudel, J., Peters, M., Nguyen-Dang, T. T., Atabek, O., and Charron, E.

Subjects
Physics - Atomic Physics, Physics - Chemical Physics, Quantum Physics
Abstract

Imaging structures at the molecular level is a fast developing interdisciplinary research field that spans across the boundaries of physics and chemistry. High spatial resolution images of molecules can be obtained with photons or ultrafast electrons. In addition, images of valence molecular orbitals can be extracted via tomographic techniques based on the coherent XUV radiation emitted by a molecular gas exposed to an intense ultra-short infrared laser pulse. In this paper, we demonstrate that similar information can be obtained by inverting energy resolved photoelectron spectra using a simplified analytical model.

Published
2016
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12. American Society of Colon and Rectal Surgeons 95th Annual Convention Podium and Poster Abstracts June 9–14, 1996 Seattle, Washington

Author

Obrand, D., Gordon, P. H., Rowley, S., Grace, R. H., Rai, S., Moran, M. R., Rai, A. M., Farouk, R., Lee, P. W. R., Edwards, J., Thorne, M., MacDonald, A. W., Duthie, G. S., Monson, J. R. T., Shabahang, M., Brenner, R., Wright, A., Montgomery, E., Trock, B., Buras, R., Schumaker, L., Nolla, J., Buffan, A., Uskokovic, M., Nauta, R., Evans, S., Velázquez, O. C., Zhou, D., Seto, R. W., Choi, J., Jabbar, A., Breen, F., Rombeau, J. L., Casillas, S., Dietz, D. W., Brand, M. I., Vladisavljevic, A., Jones, S. C., Milsom, J. W., Stuntz, M., Wilmoth, G., Ong, J., Stabile, B., Stamos, M. J., Kahn, H., Alexander, A., Rakinic, J., Nagle, D., Fry, R., Simons, A. J., Kerr, R., Toms, C., Groshen, S., Ross, R., Morris, M., Beart, R., Ortega, A., Anthone, G., Lucha, P., Rosen, L., Stasik, J., Olenwine, J., Riether, R., Khubchandani, I., Ogunbivi, O., Birnbaum, E., Fleshman, J., Kodner, I., McLeod, R. S., Geerts, W., Sniderman, K., Greenwood, C., Gregoire, R., Taylor, B., Silverman, R., Atkinson, K., Burnstein, M., Marshall, J., Burul, C., Anderson, D., Ross, T., Wilson, S., Barton, P., Maetani, S., Onodera, H., Morimoto, H., Imamura, M., Hyams, D. M., Mamounas, E., Petrelli, N., Rockette, H., Jones, J., Wolmark, N., Sofo, L., Ratto, C., Valentini, V., Ippoliti, M., Nucera, P., Merico, M., Bellantone, R., Doglietto, G. B., Crucitti, F., Goes, R., Simons, A., Gunderson, L., Grado, G., Streeter, O., Sun, J. H., Decanini-Garza, P., Kim, D. G., Wong, W. D., Rothenberger, D. A., Madoff, R. D., Madlensky, L., Berk, T., Bapat, B., Redston, M., Gallinger, S., Cohen, Z., Winde, G., Schmid, K. W., Brandt, B., Müller, R., Osswald, H., Jang, Y., Steinhagen, R., Heimann, T., Schnitzler, M., Blackstein, M., McLeod, R., Devesa, J. M., Madrid, J. M. Fernandez, Enriquez, J. M., Geerdes, B. P., Heineman, E., Konsten, J., Baeten, C. G. M., Michot, F., Lehur, P. A., Denis, P., Grise, P. H., Leborgne, J., Teniere, P., Buzelin, J. M., Stebbing, J. F., Brading, A. F., Mortensen, N. J. McC, Gunn, J., Gardiner, A., Abdullah, N., Nyam, D. C. N. K., Pemberton, J. H., Ilstrup, D., Lund, J. N., Scholefield, J. H., Stamm, L., Matzel, K. E., Stadelmaier, U., Dünne, A., Hohenberger, W., Sala, C., Garcia-Granero, E., Molina, M. J., Garcia, J. V., Lledo, S., Ternent, C. A., Shashidharan, M., Blatchford, G. J., Christensen, M. A., Thorson, A. G., Sentovich, S. M., Jensen, L. L., Lowry, A. C., Zaheer, S., Reilly, W. T., Tsang, C., Singer, D., Richard, C. S., Stern, H. S., Oliveira, L., Daniel, N., Bernstein, M., DeMarta, D., Weiss, E. G., Nogueras, J. J., Wexner, S. D., Keighley, M. R. B., Korsgen, S., Agachan, F., Kim, D. -S., Goldberg, S. M., Durham, R. M., Pruitt, G., Longo, W. E., Marchesa, P., Oliart, S., Goldblum, J., Fazio, V. W., Rantis, P. C., Daniel, G. L., Vernava, III, A. M., Becker, J. M., Marie, G. St., Ferzoco, S., Franklin, M., Rosenthal, D., Goldstein, E. T., Bass, E. M., DelPino, A., Tan, A., Pearl, R., Orsay, C., Sher, M. E., Sands, L. R., Påhlman, Lars, Hewett, P. J., Thomas, W. M., King, G., Eaton, M., Allendorf, U. D. F., Bessler, M., Whelan, R. L., Trokel, M., Laird, D., Nowygrod, R., Treat, M. R., Vukasin, P., Steele, G., Weston, L., Allendorf, J. D. F., Sellers, G., Joo, J. S., Bruce, C. J., Coller, J. A., Murray, J. J., Schoetz, Jr., D. J., Roberts, P. L., Schoetz, D., Bockler, M., Rosenblatt, M., Malhorta, S., Roberts, P., Murray, J., Coller, J., Rusin, L., Liu, C. D., Newton, T. R., Zinner, M. J., Ashley, S. W., McFadden, D. W., Tusek, D. L., Church, J. M., Strong, S. A., Grass, J., Steinhart, A. H., Greenberg, G. R., Siminovich, K., Blair, J. E., Cruz, C., Prabhakar, L. P., Laramee, C., Nelson, H., Dozois, R. R., Ozuner, G., Hull, T., Fazio, V., Navaro, G., Bauer, J. J., Gorfine, S. R., Gelemt, I. M., Harris, M. T., Kreel, I., Marcello, P. W., Rusin, L. C., Veidenheimer, M. C., Ogunbiyi, O. A., Thibault, C., Sagar, P., Wolff, B. G., Lee, F., Lee, E. C., Pennoyer, W. P., Vignati, P. V., Cohen, J., MacRae, H. M., O'Connor, B., Ton, E., Hain, J. M., Perez-Ramirez, J. J., Spencer, M. P., Gemlo, B. T., Neto, J. A. Reis, Quilici, F. A., Cordeiro, F., Reis, Jr., J. A., Neto, C. I. Reis, Gottesman, L., Tjandra, J., Takano, M., Kuromizu, J., Tsuji, Y., Lee, C. S., Ferrara, A., Levy, J. R., Larach, S. W., Krecker, M., Williamson, P. R., Wong, D. W., Sarmiento, J. M., Burgart, L. J., Frizelle, F. A., Ilstrup, D. M., Salem, R., Smith, L. E., Rooney, P. S., Chapman, M. A. S., Steele, R. J. C., Koren, R., Gal, R., Kyzer, S., Chaimoff, CH., Rodríguez-Bigas, M. A., Mahoney, M. C., Weber, T. K., Petrelli, N. J., Ault, G., Ceron, O., Conti, P., Hadfield, M. B., Turnbull, L. W., Nicholson, A. A., Horsman, A., Shibata, D., Sentovich, S., Hyland, W., Busse, P., Bleday, R., Allendorf, J., Whelan, R., Horvath, K., Treat, M., Wronski, M., Arbit, E., Bilsky, M., Galicich, J. H., Miller, A. S., Lewis, W. G., Williamson, M. E. R., Sagar, P. M., Holdsworth, P. J., Johnston, D., Smith, A. H., Marchetti, F., Thompson-Fawcett, M. W., Warren, B. F., Mortensen, N. J. M., Bouchard, S., Belliveau, P., Trudel, J., Zinsmeister, A. R., Schleck, C. D., McIntyre, P. B., Hanson, R. B., Read, T. E., Dominguez, J. M., Hyman, N. H., Beck, D. E., Dayton, M. T., Stryker, S. J., Wolf, B. G., Young-Fadok, T. M., Meagher, A., Benn, P. L., Takao, Y., Chen, F. C., Wu, J., Milsom, J., Stein, B. L., Vasilevsky, C. A., Hartley, J. E., Cureshi, A., Sellers, G. J., Van, D., Ludwig, K. A., Garcia-Ruiz, A., Espat, N. J., Rao, G. N., Drew, P. J., Pfeifer, J., Park, U. C., Gonzalez, A., Okamoto, T., Konishi, F., Tsukamoto, T., Senba, S., Kashiwagi, H., Kojima, M., Togashi, T., Kanazawa, K., Yoon, W. H., Kang, Y. N., Hong, K. H., Park, H. D., Koo, S. H., Song, K. S., Kim, J. C., Roh, S. A., Park, K. C., Jessup, J. M., Changchien, C. R., Wang, J. Y., Hsu, K. C., Chen, J. S., Tang, R., You, Y. T., Ho, Y. S., Guttman, R., Nelson, R., Sardinha, T. G. S., Gilliland, J., Kroll, M., Lee, E., Wexler, J., Hudzinski, D., Glass, D., Wolff, B. D., King, D. W., Talley, N., Chen, W. S., Lin, W. C., Hsu, H., Wrightson, W. R., Galandiuk, S., LaRocca, R., Myers, S. R., Tada, M., Inoue, H., Tsubaki, M., Endo, M., Sobzcak, S., Welch, J. P., Cohen, J. L., Allen, L. W., Morrow, J. S., Behen, S. L., Smith, K. W., Cali, J. R., Bailey, H. R., Fucini, C., Elbetti, C., Messerini, L., Law, W. L., Butts, D. R., Max, E., Memon, M. A., Devine, J., Feeney, J., Talley, N. J., Stephenson, E. R., Ilahi, O., Koltun, W. A., Spellman, M., Rantis, R. C., Vernava, A. M., Parra, R. O., Breen, E., Hayes, P., Quinn, D., Whitlow, C. B., Opelka, F. G., Gathright, J. B., Golub, R. W., Maccabee, P. J., Combs, A. J., Grose, E. A., Taylor, B. M., Kozell, K., McGannon, E., Krogh, K., Nielsen, J., Djurhuus, J. C., Mosdal, C., Sabroe, S., Laurberg, S., Chen, M. F., Kerner, B. A., Khanduja, K. S., Wise, Jr., W. E., Padmanabhan, A., Meesig, D. M., Yasin, M. T., Aguilar, P. S., Ho, Y. H., Tan, M., Seow-Choen, F., Rustin, R. B., and Harmon, J. M.

Published
1996
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14. Backfires: The joyful noise of the commentariat, rebutted sporadically by Ed.

Author

Gray, Tony, Babnik, Samo, Fry, Todd, Trudel, J., Lamb, Connor, Copeland, Jay, Hollingsworth, Greg, Petersen, Steen, Woolley, Bob, Loibissio, Joseph C., Gentner, Doug, Bedford, Joshua, Sklenar, L. J., Larsen, Sebastian, M., William, Gillis, Joshua, O'Steen, Rex, Mussari, Joe, Ehlers, Gabriel, and Theriot, Carson

Published
2018

15. Patient-driven hand hygiene audit process at a regional cancer center.

Author

Bow, E.J., Bourrier, V., Trudel, J., Kostiuk, N., and McLeod, J.M.

Abstract

A patient-driven hand hygiene compliance audit strategy was piloted in a Canadian provincial cancer agency during routine provision of cancer outpatient care by health care providers (physicians, nurses, and health care aides) under conditions where the deployment of an independent external auditor was not feasible. The results of the audit suggest the feasibility of this approach as a routine institutional performance metric. [ABSTRACT FROM AUTHOR]

Published
2018
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17. Prosocialité perçue par les éducatrices en centre de la petite enfance et pragmatique du langage des enfants de 4 ans : une question de genre ?

Author

Bouchard, C., Sylvestre, A., Leblond, J., and Trudel, J.

Subjects
EARLY childhood educators, SPECIFIC language impairment in children, SOCIAL context
Abstract

L'objectif de cet article consiste à étudier l'influence de la pragmatique du langage (usage du langage en contexte social) des filles et des garçons âgés de 4 ans (n = 120) sur la prosocialité telle qu'elle est perçue par leur éducatrice (n = 22) en centre de la petite enfance. À l'instar de moult travaux, les résultats font ressortir une différence significative en faveur des filles plutôt que des garçons, témoignant d'une perception différentielle de genre en prosocialité perçue. Puis, ils démontrent que l'initiative conversationnelle des garçons influe sur l'évaluation de la prosocialité perçue par leur éducatrice en CPE, alors que chez les filles, elle ne permet pas d'en rendre compte. En revanche, la pragmatique manifestée des filles (intentions de communication) est reliée à leur prosocialité perçue, tandis qu'elle ne l'est pas chez les garçons. Ces résultats tendent à témoigner d'une influence différenciée de la pragmatique du langage selon le sexe des enfants de 4 ans dans la prosocialité perçue par leur éducatrice en CPE. The aim of this article is to study the influence of pragmatic skills (language use in social context) of girls and boys aged 4 (n = 120) on prosociality as perceived by their early childhood educators (n = 22). As with many works, the results show a significant difference in favor of girls rather than boys, indicating a differential perception of gender in perceived prosociality. Then, they show that the conversational initiative of the boys influences the evaluation of the prosociality as perceived by their early childhood educators, whereas for the girls, it does not make it possible to account for it. On the other hand, girls' expressed pragmatics (communication intentions) are related to their perceived prosociality, whereas it is not the case for boys. These results tend to show a differentiated influence of the pragmatic skills according to the sex of 4-year-olds in the perceived prosociality by their early childhood educators. [ABSTRACT FROM AUTHOR]

Published
2020
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19. Several thaumatin-like proteins bind to beta-1,3-glucans.

Author

Trudel, J, Grenier, J, Potvin, C, and Asselin, A

Abstract

Pathogenesis-related proteins from intercellular fluid washings of stressed barley (Hordeum vulgare L.) leaves were analyzed to determine their binding to various water-insoluble polysaccharides. Three proteins (19, 16, and 15 kD) bound specifically to several water-insoluble beta-1,3-glucans. Binding of the barley proteins to pachyman occurred quickly at 22 degreesC at pH 5.0, even in the presence of 0.5 M NaCl, 0.2 M urea, and 1% (v/v) Triton X-100. Bound barley proteins were released by acidic treatments or by boiling in sodium dodecyl sulfate. Acid-released barley proteins could bind again specifically and singly to pachyman. Water-soluble laminarin and carboxymethyl-pachyman competed for the binding of the barley proteins to pachyman. The N-terminal sequence of the 19-kD barley beta-1,3-glucan-binding protein showed near identity to the barley seed protein BP-R and high homology to other thaumatin-like (TL) permatins. The 16-kD barley protein was also homologous to TL proteins, whereas the 15-kD barley protein N-terminal sequence was identical to the pathogenesis-related Hv-1 TL protein. Antifungal barley protein BP-R and corn (Zea mays) zeamatin were isolated by binding to pachyman. Two extracellular proteins from stressed pea (Pisum sativum L.) also bound to pachyman and were homologous to TL proteins.

Published
1998
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22. A new lectin-gold complex for ultrastructural localization of galacturonic acids.

Author

Benhamou, N, Gilboa-Garber, N, Trudel, J, and Asselin, A

Abstract

We report the development of a cytochemical affinity technique for detection of galacturonic acids at the ultrastructural level. The highly purified gonad lectin from Aplysia depilans (AGL) was tagged with colloidal gold particles and used for labeling carbohydrates in resin-embedded sections of various plant and fungal tissues. Patterns of AGL binding sites were compared to those obtained with a D-galactose-specific lectin, Ricinus communis agglutinin I. Differences in labeling patterns were noted, indicating that the lectins exhibited differential carbohydrate binding. In addition, the considerable loss of labeling over isolated wheat coleoptile walls treated for removal of pectin, after incubation with the AGL-gold complex, strongly suggested an affinity of AGL for pectic substances. A series of cytochemical controls, including sugar inhibition tests, has proven the specificity of the technique and the high affinity of AGL towards galacturonic acids. The potential value of this new lectin for ultrastructural studies on cell wall pectic substances in plant biology and pathology is demonstrated.

Published
1988
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23. Cloning, sequencing, and expression in Escherichia coli of a Streptococcus faecalis autolysin

Author

Béliveau, C, Potvin, C, Trudel, J, Asselin, A, and Bellemare, G

Abstract

A Streptococcus faecalis genomic bank was obtained by partial digestion with MboI and cloning into the SalI restriction site of pTZ18R. Screening of about 60,000 Escherichia coli transformants for cell wall lysis activity was done by exposing recombinant colonies grown on medium containing lyophilized Micrococcus lysodeikticus cells to chloroform and toluene vapors in order to release proteins. Because this procedure provoked cell death, colonies could not be used directly for transformant recovery; however, recovery was achieved by partial purification of plasmid DNA from active colonies on the agar plate and transformation of E. coli competent cells. About 60 recombinants were found. One of them (pSH6500) codes for a lytic enzyme active against S. faecalis and M. lysodeikticus cell walls. A shorter clone (pSH4000) was obtained by deleting an EcoRI fragment from the 6.5-kb original insert, leaving a 4-kb EcoRI-MboI insert; this subclone expressed the same lytic activity. Sequencing of a portion of pSH4000 revealed a unique open reading frame of 2,013 nucleotides coding for a 641-amino-acid (74-kDa) polypeptide and containing four 204-nucleotide direct repeats.

Published
1991
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25. Is Pinker right?

Author

Trudel, J.

Subjects
LETTERS to the editor, CONDUCT of life
Abstract

A letter to the editor is presented in response to an article on an improvement in human condition published in the November 2011 issue.

Published
2011

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