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Articles 1 - 7 of 7
Full-Text Articles in Social and Behavioral Sciences
Carbon Dioxide Rebreathing In Respiratory Protective Devices: Influence Of Speech And Work Rate In Full-Face Masks, Carmen L. Smith, Jane L. Whitelaw, Brian Davies
Carbon Dioxide Rebreathing In Respiratory Protective Devices: Influence Of Speech And Work Rate In Full-Face Masks, Carmen L. Smith, Jane L. Whitelaw, Brian Davies
Faculty of Science, Medicine and Health - Papers: part A
Carbon dioxide (CO2) rebreathing has been recognised as a concern regarding respirator use and is related to symptoms of discomfort, fatigue, dizziness, headache, muscular weakness and drowsiness. Previous investigations are limited by small sample size and have not evaluated the relationship between CO2 inhalation and phonic respiration (breathing during speech) in respiratory protective devices (RPDs). A total of 40 workers trained in the use of RPDs performed a graded exercise test on a cycle ergonometer that increased in workload every 5 min. During the third minute of each stage, participants read aloud a prepared text. Measures of mixed expired CO2 …
Allochthonous And Autochthonous Contributions To Carbon Accumulation And Carbon Store In Southeastern Australian Coastal Wetlands, N Saintilan, K Rogers, D Mazumder, C Woodroffe
Allochthonous And Autochthonous Contributions To Carbon Accumulation And Carbon Store In Southeastern Australian Coastal Wetlands, N Saintilan, K Rogers, D Mazumder, C Woodroffe
Faculty of Science, Medicine and Health - Papers: part A
Estimates of carbon store and carbon accumulation rate in mangrove and saltmarsh are beset by issues of scale and provenance. Estimates at a site do not allow scaling to regional estimates if the drivers of variability are not known. Also, carbon accumulation within soils provides a net offset only if carbon is derived in-situ, or would not otherwise be sequestered. We use a network of observation sites extending across 2000 km of southeastern Australian coastline to determine the influence of geomorphic setting and coastal wetland vegetation type on rates of carbon accumulation, carbon store and probable sources. Carbon accumulation above …
Forest Fire Management, Climate Change, And The Risk Of Catastrophic Carbon Losses, David M. J. S Bowman, Brett P. Murphy, Mathias M. Boer, Ross A. Bradstock, Geoffrey J. Cary, Mark A. Cochrane, Rodderick J. Fensham, Meg A. Krawchuk, Owen F. Price, Richard J. Williams
Forest Fire Management, Climate Change, And The Risk Of Catastrophic Carbon Losses, David M. J. S Bowman, Brett P. Murphy, Mathias M. Boer, Ross A. Bradstock, Geoffrey J. Cary, Mark A. Cochrane, Rodderick J. Fensham, Meg A. Krawchuk, Owen F. Price, Richard J. Williams
Faculty of Science, Medicine and Health - Papers: part A
Approaches to management of fireprone forests are undergoing rapid change, driven by recognition that technological attempts to subdue fire at large scales (fire suppression) are ecologically and economically unsustainable. However, our current framework for intervention excludes the full scope of the fire management problem within the broader context of fire−vegetation−climate interactions. Climate change may already be causing unprecedented fire activity, and even if current fires are within the historical range of variability, models predict that current fire management problems will be compounded by more frequent extreme fire-conducive weather conditions (eg Fried et al. 2004).
Conducting Carbon Nanofibre Networks: Dispersion Optimisation, Evaporative Casting And Direct Writing, Holly Warren, Reece D. Gately, Hayley N. Moffat, Marc In Het Panhuis
Conducting Carbon Nanofibre Networks: Dispersion Optimisation, Evaporative Casting And Direct Writing, Holly Warren, Reece D. Gately, Hayley N. Moffat, Marc In Het Panhuis
Faculty of Science, Medicine and Health - Papers: part A
The optimisation of vapour-grown carbon nanofibres (VGCNFs) dispersed in the biopolymer gellan gum (GG) and its usage as an ink for the direct writing of conducting networks are reported. Sonication optimisation showed that dispersing 10 mg per mL VGCNFs required 3 mg per mL GG solution and 4 minutes of low energy probe sonication. Free-standing films prepared by evaporative casting were found to exhibit electrical conductivity values of up to 35 ± 2 S cm-1. It is demonstrated that sonolysis has a detrimental effect on electrical conductivity. The dispersions were easily modified to allow for direct writing of conducting networks …
Bacterial Filtration Using Carbon Nanotube/Antibiotic Buckypaper Membranes, Luke J. Sweetman, Leighton J. Alcock, Jason D. Mcarthur, Elise M. Stewart, Gerry Triani, Marc In Het Panhuis, Stephen F. Ralph
Bacterial Filtration Using Carbon Nanotube/Antibiotic Buckypaper Membranes, Luke J. Sweetman, Leighton J. Alcock, Jason D. Mcarthur, Elise M. Stewart, Gerry Triani, Marc In Het Panhuis, Stephen F. Ralph
Faculty of Science, Medicine and Health - Papers: part A
The preparation of free-standing carbon nanotube “buckypaper” (BP) membranes consisting of either single-walled carbon nanotubes (SWNTs) or multi-walled carbon nanotubes (MWNTs), and the antibiotic ciprofloxacin (cipro), is reported. The electrical, mechanical and morphological properties of these membranes have been characterised and are compared to those of the corresponding buckypaper membranes containing the surfactant Triton X-100 (Trix). Analysis of scanning electron microscopic images of the surfaces of SWNT/cipro and SWNT/Trix (Trix = Triton X-100) buckypapers revealed that the diameter of their surface pores was significantly smaller than that of the corresponding materials prepared using MWNTs. Similarly, the average internal pore diameter …
First Intercalibration Of Column-Averaged Methane From The Total Carbon Column Observing Network And The Network For The Detection Of Atmospheric Composition Change, R Sussmann, A Ostler, F Forster, M Rettinger, N M. Deutscher, D W. T Griffith, J W. Hannigan, N Jones, P K. Patra
First Intercalibration Of Column-Averaged Methane From The Total Carbon Column Observing Network And The Network For The Detection Of Atmospheric Composition Change, R Sussmann, A Ostler, F Forster, M Rettinger, N M. Deutscher, D W. T Griffith, J W. Hannigan, N Jones, P K. Patra
Faculty of Science, Medicine and Health - Papers: part A
We present the first intercalibration of dry-air column-averaged mole fractions of methane (XCH4) retrieved from solar Fourier transform infrared (FTIR) measurements of the Network for the Detection of Atmospheric Composition Change (NDACC) in the mid-infrared (MIR) versus near-infrared (NIR) soundings from the Total Carbon Column Observing Network (TCCON). The study uses multi-annual quasi-coincident MIR and NIR measurements from the stations Garmisch, Germany (47.48° N, 11.06° E, 743 m a.s.l.), and Wollongong, Australia (34.41° S, 150.88° E, 30 m a.s.l.). Direct comparison of the retrieved MIR and NIR XCH4 time series for Garmisch shows a quasi-periodic seasonal bias leading to a …
Does Addition Of No2 To Carbon-Centered Radicals Yield Rono Or Rno2? An Investigation Using Distonic Radical Ions, Benjamin B. Kirk, Adam J. Trevitt, Stephen J. Blanksby
Does Addition Of No2 To Carbon-Centered Radicals Yield Rono Or Rno2? An Investigation Using Distonic Radical Ions, Benjamin B. Kirk, Adam J. Trevitt, Stephen J. Blanksby
Faculty of Science, Medicine and Health - Papers: part A
Nitrogen dioxide is used as a "radical scavenger" to probe the position of carbon-centered radicals within complex radical ions in the gas phase. As with analogous neutral radical reactions, this addition results in formation of an [M + NO2](+) adduct, but the structural identity of this species remains ambiguous. Specifically, the question remains: do such adducts have a nitro-(RNO2) or nitrosoxy-(RONO) moiety, or are both isomers present in the adduct population? In order to elucidate the products of such reactions, we have prepared and isolated three distonic phenyl radical cations and observed their reactions with nitrogen dioxide in the gas …