Search

Your search keyword '"Bégin-Drolet, André"' showing total 47 results
Start Over Author "Bégin-Drolet, André"
47 results on '"Bégin-Drolet, André"'

7. A Nanoparticle Ink Allowing the High Precision Visualization of Tissue Engineered Scaffolds by MRI (Small 30/2023)

Author

Leon‐Chaviano, Samila, primary, Kiseleva, Mariia, additional, Legros, Philippe, additional, Collin, Simon, additional, Lescot, Théophraste, additional, Henoumont, Céline, additional, Gossuin, Yves, additional, Laurent, Sophie, additional, Mayrand, Dominique, additional, Fradette, Julie, additional, Bégin‐Drolet, André, additional, Ruel, Jean, additional, and Fortin, Marc‐André, additional

Published
2023
Full Text
View/download PDF

18. Linear scanning ATR-FTIR for chemical mapping and high-throughput studies of Pseudomonas sp. biofilms in microfluidic channels

Author

Pousti, Mohammad, Joly, Maxime, Roberge, Patrice, Amirdehi, Mehran Abbaszadeh, Bégin-Drolet, Andre, and Greener, Jesse

Subjects
Physics - Instrumentation and Detectors, Physics - Biological Physics
Abstract

A fully automated linear scanning attenuated total reflection (ATR) accessory is presented for Fourier transform infrared (FTIR) spectroscopy. The approach is based on the accurate displacement of a multi-bounce ATR crystal relative to a stationary infrared beam. To ensure accurate positioning and to provide a second sample characterization mode, a custom-built microscope was integrated into the system and the computerized work flow. Custom software includes automated control and measurement routines with a straightforward user interface for selecting parameters and monitoring experimental progress. This cost-effective modular system can be implemented on any research-grade spectrometer with a standard sample compartment for new bioanalytical chemistry studies. The system was validated and optimized for use with microfluidic flow cells containing growing Pseudomonas sp. bacterial biofilms. The complementarity among the scan positioning accuracy, measurement spatial resolution and the microchannel dimensions paves the way for parallel biological assays with real-time control over environmental parameters and minimal manual labor. By rotating the channel orientation relative to the beam path, the system could also be used for acquisition of linear biochemical maps and stitched microscope images along the channel length., Comment: 9 pages, 6 figures

Published
2018
Full Text
View/download PDF

27. Microflow sensing and control using an in-channel birefringent biomembrane.

Author

Jia, Nan, Deng, Tianyang, Larouche, Charles, Galstian, Tigran, Bégin-Drolet, André, and Greener, Jesse

Abstract

This study describes the function, optimization, and demonstration of a new class of passive, low-cost microfluidic flow meters based on birefringent chitosan biomembranes analyzed by polarized microscopy. We subjected the membrane to dynamic flow conditions while monitoring the real-time response of its optical properties. We obtained figures of merit, including the linear response operating range (0 to 65 μL min−1), minimum response time (250 ms), sensitivity (2.03% × 10−3 μL−1 min), and minimum sensor longevity (1 week). In addition, possible sources of interference were identified. Finally, we demonstrate the membrane as a low-cost flow rate measurement device for the close loop control of a commercial pressure-driven pump. Preliminary experiments using a basic PID controller with the membrane-based flow rate measurement device showed that stable control could be achieved and the system could reach steady-state behavior in less than 15 seconds. Analysis of fundamental limits to sensor response time indicate the potential for faster steady-state behaviour. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

32. Full-Scale Implementation of an Automated Connecting Device for Modular Construction.

Author

Picard, Laurence, Blanchet, Pierre, and Bégin-Drolet, André

Subjects
MODULAR construction, RESEARCH personnel, FUNCTIONAL status, JOINTS (Engineering)
Abstract

Modular construction is characterized by assembling volumetric units on site. Once assembled on site, the structural integrity of modular buildings highly relies on connections that provide essential performance against critical loading conditions. Connections significantly impact field assembly activities, and previous research has highlighted the importance of their functional performance. In this study, the researchers focus on implementing automated connecting devices in a full-scale experimental project. It presents the implementation of a self-locking inter-modular connector and an investigation of the benefits and limitations of its application in modular building systems. This study also investigates the use of connectors as attachment points for modular handling and lifting. It evaluates the pros and cons of combining a single device's connecting and lifting functions. The implementation of an automated connecting device in the building design process is covered as well as the evaluation of its impacts on architectural, structural, and functional considerations. Finally, the potential of automated connecting devices to improve modular building systems' overall performance and efficiency is assessed, and guidelines are identified to facilitate their adoption. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results