G
Graham R. Johnson
Researcher at Queensland University of Technology
Publications - 97
Citations - 5869
Graham R. Johnson is an academic researcher from Queensland University of Technology. The author has contributed to research in topics: Aerosol & Particle number. The author has an hindex of 32, co-authored 97 publications receiving 4542 citations. Previous affiliations of Graham R. Johnson include University of Queensland.
Papers
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Journal ArticleDOI
Size distribution and sites of origin of droplets expelled from the human respiratory tract during expiratory activities
Lidia Morawska,Graham R. Johnson,Zoran Ristovski,Megan Hargreaves,Kerrie Mengersen,Stephen Corbett,Christopher Y.H. Chao,Yuguo Li,David Katoshevski +8 more
TL;DR: In this article, a new expiratory droplet investigation system (EDIS) was used to conduct the most comprehensive program of study to date, of the dilution corrected droplet size distributions produced during different respiratory activities.
Journal ArticleDOI
Characterization of expiration air jets and droplet size distributions immediately at the mouth opening
Christopher Y.H. Chao,M.P. Wan,Lidia Morawska,Graham R. Johnson,Zoran Ristovski,Megan Hargreaves,Kerrie Mengersen,Stephen Corbett,Yuguo Li,Xaiojan Xie,David Katoshevski +10 more
TL;DR: The size distributions of expiratory droplets expelled during coughing and speaking and the velocities of the expiration air jets of healthy volunteers were measured using the interferometric Mie imaging and particle image velocimetry techniques to avoid air sampling losses.
Journal ArticleDOI
Modality of human expired aerosol size distributions
Graham R. Johnson,Lidia Morawska,Zoran Ristovski,Megan Hargreaves,Kerrie Mengersen,Christopher Y.H. Chao,M.P. Wan,Yuguo Li,Xaiojan Xie,Xaiojan Xie,David Katoshevski,Stephen Corbett +11 more
TL;DR: In this article, the authors integrated the results of two different investigative techniques spanning 3 decades of particle size from 700nm to 1mm, presenting a single composite size distribution, and identifying the most prominent modes in that distribution.
Journal ArticleDOI
Emergence and spread of a human-transmissible multidrug-resistant nontuberculous mycobacterium.
Josephine M. Bryant,Josephine M. Bryant,Dorothy M Grogono,Dorothy M Grogono,Daniela Rodriguez-Rincon,Isobel Everall,Karen Brown,Karen Brown,Pablo Moreno,Deepshikha Verma,Emily Hill,Judith Drijkoningen,Peter H. Gilligan,Charles R. Esther,Peadar G. Noone,Olivia Giddings,Scott C. Bell,Scott C. Bell,Rachel Thomson,Claire E. Wainwright,Claire E. Wainwright,Chris Coulter,Sushil Pandey,Michelle Wood,Michelle Wood,Rebecca E Stockwell,Rebecca E Stockwell,Kay A. Ramsay,Kay A. Ramsay,Laura J. Sherrard,Timothy J. Kidd,Timothy J. Kidd,Nassib Jabbour,Graham R. Johnson,Luke D. Knibbs,Lidia Morawska,Peter D. Sly,Andrew Jones,Diana Bilton,Ian F. Laurenson,Michael Ruddy,Stephen Bourke,Ian C. J. W. Bowler,Stephen J Chapman,Andrew Clayton,Mairi Cullen,Owen J. Dempsey,Miles Denton,M. Desai,Richard J Drew,Frank Edenborough,Jason T. Evans,Jonathan Folb,Thomas Daniels,Helen Humphrey,Barbara Isalska,Søren Jensen-Fangel,Bodil Jönsson,Andrew M Jones,Terese L. Katzenstein,Troels Lillebaek,Gordon MacGregor,Sarah Mayell,Michael Millar,Deborah E. Modha,Edward F. Nash,C. O'Brien,Deirdre O'Brien,Chandra Ohri,Caroline S. Pao,Daniel Peckham,Felicity Perrin,Audrey Perry,Tania Pressler,Laura Prtak,Tavs Qvist,Ali Robb,Helen Rodgers,Kirsten Schaffer,Nadia Shafi,Jakko van Ingen,Martin Walshaw,Danie Watson,Noreen West,Joanna L. Whitehouse,Charles S. Haworth,Simon R. Harris,Diane J. Ordway,Julian Parkhill,R. Andres Floto,R. Andres Floto +90 more
TL;DR: Using whole-genome analysis of a global collection of clinical isolates, it is shown that the majority of M. abscessus infections are acquired through transmission, potentially via fomites and aerosols, of recently emerged dominant circulating clones that have spread globally.
Journal ArticleDOI
The mechanism of breath aerosol formation.
Graham R. Johnson,Lidia Morawska +1 more
TL;DR: The observed asymmetry of production in the breathing cycle with very little aerosol being produced by exhalation is inconsistent with the widely assumed turbulence-induced aerosolization mechanism.