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Full-Text Articles in Social and Behavioral Sciences

Automatic Reaction To A Chemical Event Detected By A Low-Cost Wireless Chemical Sensing Network, Stephen Beirne, King Tong Lau, Brian Corcoran, Dermot Diamond Dec 2008

Automatic Reaction To A Chemical Event Detected By A Low-Cost Wireless Chemical Sensing Network, Stephen Beirne, King Tong Lau, Brian Corcoran, Dermot Diamond

Faculty of Science - Papers (Archive)

A test-scale wireless chemical sensor network (WCSN) has been deployed within a controlled Environmental Chamber (EC). The combined signals from the WCSN were used to initiate a controllable response to the detected chemical event. When a particular sensor response pattern was obtained, a purging cycle was initiated. Sensor data were continuously checked against user-defined action limits, to determine if a chemical event had occurred. An acidic contaminant was used to demonstrate the response of the sensor network. Once the acid plume was simultaneously detected by a number of wireless chemical sensor nodes, an automatic response action, which was the purging ...


Dynamics Of Apomyoglobin In The Α-To-Β Transition And Of Partially Unfolded Aggregated Protein, E. Fabiani, A. M. Stadler, D. Madern, M. M. Koza, M. Tehei, M. Hirai, G. Zaccai Oct 2008

Dynamics Of Apomyoglobin In The Α-To-Β Transition And Of Partially Unfolded Aggregated Protein, E. Fabiani, A. M. Stadler, D. Madern, M. M. Koza, M. Tehei, M. Hirai, G. Zaccai

Faculty of Science - Papers (Archive)

Changes of molecular dynamics in the α-to-β transition associated with amyloid fibril formation were explored on apo-myoglobin (ApoMb) as a model system. Circular dichroism, neutron and X-ray scattering experiments were performed as a function of temperature on the protein, at different solvent conditions. A significant change in molecular dynamics was observed at the α-to-β transition at about 55 ˚C, indicating a more resilient high temperature β structure phase. A similar effect at approximately the same temperature was observed in holo-myoglobin, associated with partial unfolding and protein aggregation. A study in a wide temperature range between 20 K and 360 K ...


M Protein Mediated Plasminogen Binding Is Essential For The Virulence Of An Invasive Streptococcus Pyogenes Isolate, Martina L. Sanderson-Smith, K. Dinkla, J. N. Cole, Amanda J. Cork, P. G. Maamary, Jason D. Mcarthur, G. S. Chhatwal, Mark J. Walker Sep 2008

M Protein Mediated Plasminogen Binding Is Essential For The Virulence Of An Invasive Streptococcus Pyogenes Isolate, Martina L. Sanderson-Smith, K. Dinkla, J. N. Cole, Amanda J. Cork, P. G. Maamary, Jason D. Mcarthur, G. S. Chhatwal, Mark J. Walker

Faculty of Science - Papers (Archive)

The human protease plasmin plays a crucial role in the capacity of the group A streptococcus (Streptococus pyogenes; GAS) to initiate invasive disease. The GAS strain NS88.2 was isolated from a case of bacteremia from the Northern Territory of Australia, a region with high rates of GAS invasive disease. Mutagenesis of the NS88.2 plasminogen binding M protein Prp was undertaken to examine the contribution of plasminogen binding and cell surface plasmin acquisition to virulence. The isogenic mutant NS88.2prp was engineered whereby four amino acid residues critical for plasminogen binding were converted to alanine codons in the GAS ...


Small Heat Shock Protein Activity Is Regulated By Variable Oligomeric Substructure, J. L. Benesch, M. Ayoub, C. V. Robinson, J. A. Aquilina Aug 2008

Small Heat Shock Protein Activity Is Regulated By Variable Oligomeric Substructure, J. L. Benesch, M. Ayoub, C. V. Robinson, J. A. Aquilina

Faculty of Science - Papers (Archive)

The alpha-crystallins are members of the small heat shock protein (sHSP) family of molecular chaperones which have evolved to minimize intracellular protein aggregation, however they are also implicated in a number of protein deposition diseases. In this study we have employed novel mass spectrometry techniques to investigate the changes in quaternary structure associated with this switch from chaperone to adjuvant of aggregation. We have replicated the oligomeric rearrangements observed for in vivo disease-related modifications, without altering the protein sequence, by refolding the alpha-crystallins in vitro. This refolding results in a loss of dimeric substructure concomitant with an augmentation of substrate ...


Cell Wall-Bound Ultraviolet-Screening Compounds Explain The High Ultraviolet Tolerance Of The Antarctic Moss, Ceratodon Purpureus, L. J. Clarke, Sharon A. Robinson Aug 2008

Cell Wall-Bound Ultraviolet-Screening Compounds Explain The High Ultraviolet Tolerance Of The Antarctic Moss, Ceratodon Purpureus, L. J. Clarke, Sharon A. Robinson

Faculty of Science - Papers (Archive)

Studies of ultraviolet (UV) light-induced DNA damage in three Antarctic moss species have shown Ceratodon purpureus to be the most UV tolerant, despite containing lower concentrations of methanol-soluble UV-screening compounds than the co-occurring Bryum pseudotriquetrum. In this study, alkali extraction of cell wall-bound phenolics, combined with methanol extraction of soluble phenolics, was used to determine whether cell wall-bound UV screens explain the greater UV tolerance of C. purpureus. The combined pool of UV screens was similar in B. pseudotriquetrum and C. purpureus, but whilst B. pseudotriquetrum had almost equal concentrations of MeOH-soluble and alkali-extractable cell wall-bound UV-screening compounds, in C ...


Mid-Holocene Enso: Issues In Quantitative Model-Proxy Data Comparisons, J Brown, A W. Tudhope, M Collins, H V. Mcgregor Jul 2008

Mid-Holocene Enso: Issues In Quantitative Model-Proxy Data Comparisons, J Brown, A W. Tudhope, M Collins, H V. Mcgregor

Faculty of Science - Papers (Archive)

Evaluation of climate model simulations using observed data contributes to the assessment of confidence in model predictions of future climate change. The mid-Holocene represents an opportunity to evaluate model simulations of El Niño–Southern Oscillation (ENSO) in comparison with coral proxy evidence of reduced ENSO amplitude. Quantitative comparisons between coral records and model output have been limited by (1) the use of different measures of ENSO amplitude, (2) possible sampling of natural variability in short records, and (3) uncertainty about the stationarity of the relationship between central Pacific sea surface temperature (SST) variability and ENSO signals at the coral site ...


Allelic Variants Of Streptokinase From Streptococcus Pyogenes Display Functional Differences In Plasminogen Activation., Jason D. Mcarthur, F. C. Mckay, V. Ramachandran, P. Shyam, Amanda J. Cork, Martina L. Sanderson-Smith, J. N. Cole, U. Ringdahl, U. Sjobring, M. Ranson, Mark J. Walker May 2008

Allelic Variants Of Streptokinase From Streptococcus Pyogenes Display Functional Differences In Plasminogen Activation., Jason D. Mcarthur, F. C. Mckay, V. Ramachandran, P. Shyam, Amanda J. Cork, Martina L. Sanderson-Smith, J. N. Cole, U. Ringdahl, U. Sjobring, M. Ranson, Mark J. Walker

Faculty of Science - Papers (Archive)

A common mammalian defence mechanism employed to prevent systemic dissemination of invasive bacteria involves occlusion of local microvasculature and encapsulation of bacteria within fibrin networks. Acquisition of plasmin activity at the bacterial cell surface circumvents this defence mechanism allowing invasive disease initiation. To facilitate this process, S. pyogenes secrete streptokinase, a plasminogen activating protein. Streptokinase polymorphism exhibited by S. pyogenes isolates is well characterised. However, the functional differences displayed by these variants and the biological significance of this variation has not been elucidated. Phylogenetic analysis of ska sequences from 28 S. pyogenes isolates revealed two main sequence clusters (clusters 1 ...


Down To Atomic-Scale Intracellular Water Dynamics, M. Jasnin, M. Moulin, M. Haertlein, G. Zaccai, M. Tehei May 2008

Down To Atomic-Scale Intracellular Water Dynamics, M. Jasnin, M. Moulin, M. Haertlein, G. Zaccai, M. Tehei

Faculty of Science - Papers (Archive)

Water constitutes the intracellular matrix in which biological molecules interact. Understanding its dynamic state is a main scientific challenge, which continues to provoke controversy after more than 50 years of study. We measured water dynamics in vivo in the cytoplasm of Escherichia coli by using neutron scattering and isotope labelling. Experimental timescales covered motions from pure water to interfacial water, on an atomic length scale. In contrast to the widespread opinion that water is ‘tamed’ by macromolecular confinement, the measurements established that water diffusion within the bacteria is similar to that of pure water at physiological temperature.


In Vivo Measurement Of Internal And Global Macromolecular Motions In E. Coli, M. Jasnin, M. Moulin, M. Haertlein, G. Zaccai, M. Tehei Mar 2008

In Vivo Measurement Of Internal And Global Macromolecular Motions In E. Coli, M. Jasnin, M. Moulin, M. Haertlein, G. Zaccai, M. Tehei

Faculty of Science - Papers (Archive)

We present direct quasielastic neutron scattering measurements, in vivo, of macromolecular dynamics in E. coli. The experiments were performed on a wide range of time-scales, to cover the large panel of internal and self-diffusion motions. Three major internal processes were extracted at physiological temperature: a fast picosecond (ps) process that corresponded to restricted jump diffusion motions, and two slower processes that resulted from reorientational motions occurring in about 40 ps and 90 ps, respectively. The analysis of the fast process revealed that the cellular environment leads to an appreciable increase in internal molecular flexibility and diffusive motion rates compared to ...


Opacity Factor Activity And Epithelial Cell Binding By The Serum Opacity Factor Protein Of Streptococcus Pyogenes Are Functionally Discrete, C. M. Gillen, H. S. Courtney, K. Schulze, M. Rohde, Mark R. Wilson, A. M. Timmer, C. A. Guzman, V. Nizet, G. S. Chhatwal, Mark J. Walker Mar 2008

Opacity Factor Activity And Epithelial Cell Binding By The Serum Opacity Factor Protein Of Streptococcus Pyogenes Are Functionally Discrete, C. M. Gillen, H. S. Courtney, K. Schulze, M. Rohde, Mark R. Wilson, A. M. Timmer, C. A. Guzman, V. Nizet, G. S. Chhatwal, Mark J. Walker

Faculty of Science - Papers (Archive)

Serum opacity factor (SOF) is a unique multifunctional virulence determinant expressed at the surface of Streptococcus pyogenes and has been shown to elicit protective immunity against GAS infection in a murine challenge model. SOF consists of two distinct domains with different binding capacities: an N-terminal domain that binds apolipoprotein AI and a C-terminal repeat domain that binds fibronectin and fibrinogen. The capacity of SOF to opacify serum by disrupting the structure of high density lipoproteins may preclude its use as a vaccine antigen in humans. This study generated mutant forms of recombinant SOF with reduced (100-fold) or abrogated opacity factor ...


Somatic Mutation And The Antarctic Ozone Hole, L. J. Clarke, Sharon A. Robinson, D. J. Ayre Mar 2008

Somatic Mutation And The Antarctic Ozone Hole, L. J. Clarke, Sharon A. Robinson, D. J. Ayre

Faculty of Science - Papers (Archive)

1 Previous studies of Antarctic clonal moss populations using RAPD markers have reported extraordinarily high levels of genetic variation. This has been claimed to reflect somatic mutation, possibly resulting from elevated UV-B radiation. 2 Our study used microsatellite markers to compare the genetic variation present within continental Antarctic, sub-Antarctic and temperate populations of the moss Ceratodon purpureus. 3 In contrast to the RAPD studies, microsatellite data revealed that C. purpureus populations from continental Antarctica display less intra-population genetic diversity than populations from a range of temperate and sub-Antarctic sites. 4 Analysis of Molecular Variation (AMOVA) revealed that populations within the ...


Solvent Isotope Effect On Macromolecular Dynamics In E. Coli, M. Jasnin, M. Tehei, M. Moulin, M. Haertlein, G. Zaccai Feb 2008

Solvent Isotope Effect On Macromolecular Dynamics In E. Coli, M. Jasnin, M. Tehei, M. Moulin, M. Haertlein, G. Zaccai

Faculty of Science - Papers (Archive)

Elastic incoherent neutron scattering was used to explore solvent isotope effects on average macromolecular dynamics in vivo. Measurements were performed on living E. coli bacteria containing H2O and D2O, respectively, close to physiological conditions of temperature. Global macromolecular flexibility, expressed as mean square fluctuation (MSF) values, and structural resilience in a free energy potential, expressed as a mean effective force constant, hk0i, were extracted in the two solvent conditions. They referred to the average contribution of all macromolecules inside the cell, mostly dominated by the internal motions of the protein fraction. Flexibility and resilience were both found to be smaller ...


Synchronicity Of Thermogenic Activity, Alternative Pathway Respiratory Flux, Aox Protein Content, And Carbohydrates In Receptacle Tissues Of Sacred Lotus During Floral Development, Nicole M. Grant, Rebecca E. Miller, Jennifer R. Watling, Sharon A. Robinson Feb 2008

Synchronicity Of Thermogenic Activity, Alternative Pathway Respiratory Flux, Aox Protein Content, And Carbohydrates In Receptacle Tissues Of Sacred Lotus During Floral Development, Nicole M. Grant, Rebecca E. Miller, Jennifer R. Watling, Sharon A. Robinson

Faculty of Science - Papers (Archive)

The relationships between heat production, alternative oxidase (AOX) pathway flux, AOX protein, and carbohydrates during floral development in Nelumbo nucifera (Gaertn.) were investigated. Three distinct physiological phases were identified: pre-thermogenic, thermogenic, and post-thermogenic. The shift to thermogenic activity was associated with a rapid, 10-fold increase in AOX protein. Similarly, a rapid decrease in AOX protein occurred post-thermogenesis. This synchronicity between AOX protein and thermogenic activity contrasts with other thermogenic plants where AOX protein increases some days prior to heating. AOX protein in thermogenic receptacles was significantly higher than in post-thermogenic and leaf tissues. Stable oxygen isotope measurements confirmed that the ...


Removal Of Structurally Different Dyes In Submerged Membrane Fungi Reactor—Biosorption/Pac-Adsorption, Membrane Retention And Biodegradation, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi Jan 2008

Removal Of Structurally Different Dyes In Submerged Membrane Fungi Reactor—Biosorption/Pac-Adsorption, Membrane Retention And Biodegradation, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi

Faculty of Science - Papers (Archive)

The long-term performance of a submerged membrane fungi reactor was observed while a synthetic textile wastewater containing either or both of the two structurally different azo dyes was continuously fed. Compared to the Acid Orange II dye (simpler structure), higher biosorption but slower biodegradation of the polymeric dye (Poly S119) was observed in sterile batch tests. In the membrane bioreactor (MBR), although a relative abundance of fungi (66%) without any specific control of bacterial contamination could be maintained, unlike in pure fungus culture, enzymatic activity was below detection limit. Nevertheless, >99% removal of Poly S119 was consistently achieved under a ...


Fouling Resistant Compact Hollow-Fiber Module With Spacer For Submerged Membrane Bioreactor Treating High Strength Industrial Wastewater, Faisal I. Hai, Kazuo Yamamoto, Kensuke Fukushi, Fumiyuki Nakajima Jan 2008

Fouling Resistant Compact Hollow-Fiber Module With Spacer For Submerged Membrane Bioreactor Treating High Strength Industrial Wastewater, Faisal I. Hai, Kazuo Yamamoto, Kensuke Fukushi, Fumiyuki Nakajima

Faculty of Science - Papers (Archive)

Long-term investigations carried out in a submerged membrane fungi reactor treating textile wastewater revealed the excellent fouling prevention capacity of spacer-filled hollow-fiber modules. The type and arrangement of the spacers governed the overall rigidity of the modules and played the critical role in avoidance of sludge intrusion and retrieval of the original state (cleaning). A hybrid module (fiber packing density = 61.5%, surface area = 1.07 m2) obtained by winding a rigid spacer (thickness = 1 mm, opening = 7 mm × 7 mm) on the surface of a module originally containing a flexible thin spacer (opening = 1 mm × 1 mm) exhibited the ...


Growth Of Atomically Flat Nanofilms And Surface Superstructures Of Intrinsic Liquid Alloys, Toshiro Yamanaka, Jianli Wang, Tadaaki Nagao, Shin Yaginuma, Canhua Liu, Andrey Tupkalo, Toshio Sakurai Jan 2008

Growth Of Atomically Flat Nanofilms And Surface Superstructures Of Intrinsic Liquid Alloys, Toshiro Yamanaka, Jianli Wang, Tadaaki Nagao, Shin Yaginuma, Canhua Liu, Andrey Tupkalo, Toshio Sakurai

Faculty of Science - Papers (Archive)

Atomically flat nanofilms were formed during growth of Ga on a Si(111) surface using an In surfactant above the melting point of Ga (and In–Ga eutectic) throughout Ga coverages of 0.17 to 5 monolayers (0.17 ≤ ΘGa ≤5). Unique superstructures such as a quasisquare-lattice (QS) structure at ΘGa=3 to 4 and a 5x5 structure at 0Ga=5 appeared as ΘGa increased. The QS structure had Ga dimer layers similar to the square lattices of an alpha-Ga(100) plane but also maintained the 1x1 structure of Si(111). As dimer layers transformed into a monoatomic layer, QS ...


Three Years Of Greenhouse Gas Column-Averaged Dry Air Mole Fractions Retrieved From Satellite - Part 1: Carbon Dioxide, O. Schneising, M. Buchwitz, J. Burrows, H. Bovensmann, Markus Reuter, Justus Notholt, Ronald Macatangay, Thorsten Warneke Jan 2008

Three Years Of Greenhouse Gas Column-Averaged Dry Air Mole Fractions Retrieved From Satellite - Part 1: Carbon Dioxide, O. Schneising, M. Buchwitz, J. Burrows, H. Bovensmann, Markus Reuter, Justus Notholt, Ronald Macatangay, Thorsten Warneke

Faculty of Science - Papers (Archive)

Carbon dioxide (CO2) and methane (CH4) are the two most important anthropogenic greenhouse gases. SCIAMACHY on ENVISAT is the first satellite instrument whose measurements are sensitive to concentration changes of the two gases at all altitude levels down to the Earth’s surface where the source/sink signals are largest. We have processed three years (2003–2005) of SCIAMACHY near infrared nadir measurements to simultaneously retrieve vertical columns of CO2 (from the 1.58μm absorption band), CH4 (1.66μm) and oxygen (O2 A-band at 0.76μm) using the scientific retrieval algorithm WFM-DOAS. We show that the latest version of WFM-DOAS ...


A Framework For Comparing Remotely Sensed And In-Situ Co2 Concentrations, Ronald Macatangay, Thorsten Warneke, C. Gerbig, S. Korner, R. Ahmadov, M. Heimann, Justus Notholt Jan 2008

A Framework For Comparing Remotely Sensed And In-Situ Co2 Concentrations, Ronald Macatangay, Thorsten Warneke, C. Gerbig, S. Korner, R. Ahmadov, M. Heimann, Justus Notholt

Faculty of Science - Papers (Archive)

A framework has been developed that allows validating CO2 column averaged volume mixing ratios (VMRs) retrieved from ground-based solar absorption measurements using Fourier transform infrared spectrometry (FTS) against measurements made in-situ (such as from aircrafts and tall towers). Since in-situ measurements are done frequently and at high accuracy on the global calibration scale, linking this scale with FTS total column retrievals ultimately provides a calibration scale for remote sensing. FTS, tower and aircraft data were analyzed from measurements during the CarboEurope Regional Experiment Strategy (CERES) from May to June 2005 in Biscarrosse, France. Carbon dioxide VMRs from the MetAir Dimona ...


Social Justice In The Forest: Aboriginal Engagement With Australia's Forest Industries, Sue Feary Jan 2008

Social Justice In The Forest: Aboriginal Engagement With Australia's Forest Industries, Sue Feary

Faculty of Science - Papers (Archive)

What remains of Australia’s native forests are important to Aboriginal people for environmental, cultural and economic reasons. Managers of forests in protected areas at State and Commonwealth levels have policies for involving Aboriginal people in forest management and for protecting the intangible and tangible values that Aboriginal people place on forests, but there are limited opportunities for significant economic returns to Aboriginal communities. Outside of conservation reserves, there are native timber production forests on crown land, plantations on private and public land and, forests on Aboriginal land, that offer a range of opportunities for Aboriginal people to engage with ...


Human Pathogenic Streptococcal Proteomics And Vaccine Development, J. N. Cole, A. Henningham, C. M. Gillen, V. Ramachandran, Mark J. Walker Jan 2008

Human Pathogenic Streptococcal Proteomics And Vaccine Development, J. N. Cole, A. Henningham, C. M. Gillen, V. Ramachandran, Mark J. Walker

Faculty of Science - Papers (Archive)

Gram-positive streptococci are non-motile, chain-forming bacteria commonly found in the normal oral and bowel flora of warm-blooded animals. Over the past decade, a proteomic approach combining 2-DE and MS has been used to systematically map the cellular, surface-associated and secreted proteins of human pathogenic streptococcal species. The public availability of complete streptococcal genomic sequences and the amalgamation of proteomic, genomic and bioinformatic technologies have recently facilitated the identification of novel streptococcal vaccine candidate antigens and therapeutic agents. The objective of this review is to examine the constituents of the streptococcal cell wall and secreted proteome, the mechanisms of transport of ...


The Holocene Paleo-Tsunami History Of West Australia, S. R. Scheffers, A. Scheffers, D. Kelletat, Edward A. Bryant Jan 2008

The Holocene Paleo-Tsunami History Of West Australia, S. R. Scheffers, A. Scheffers, D. Kelletat, Edward A. Bryant

Faculty of Science - Papers (Archive)

West Australian coastlines experienced several tsunamis in mid-Holocene times. To expand our knowledge about Holocene tsunami events in West Australia, the authors extended the previously studied spatial scale to include the central- and south-western coastlines. Several of the discovered events were mid- and young Holocene (≤1000 yr BP) tsunami impacts on the outer coast of the Cape Range Peninsula. Five hundred kilometres to the south between Cape Cuvier and Point Quobba, additional tsunami evidence exists on top of steep cliffs over a coastal stretch of 30 km. The sedimentary signature of two tsunamis is documented in this area by wide ...


Understanding The Tolerance Of Antarctic Mosses To Climate Change, Sharon A. Robinson, L J. Clarke Jan 2008

Understanding The Tolerance Of Antarctic Mosses To Climate Change, Sharon A. Robinson, L J. Clarke

Faculty of Science - Papers (Archive)

Climate change is expected to affect the high latitudes first and most severely, rendering Antarctica one of the most significant baseline environments for the study of global climate change. Despite this, there have been few long-term studies of the response of Antarctic vegetation to climate change. The Windmill Islands region supports some of the most extensive and best developed vegetation on continental Antarctica, with lush, green mossbeds along many of the lakes and melt streams close to Casey station. Over the past 12 years my University of Wollongong colleagues and I have studied the mosses of this region to better ...


Glutamic Acid Residues In The C-Terminal Extension Of Hsp25 Are Critical For Structural And Functional Integrity, A. M. Morris, T. M. Treweek, J. A. Aquilina, J. A. Carver, Mark J. Walker Jan 2008

Glutamic Acid Residues In The C-Terminal Extension Of Hsp25 Are Critical For Structural And Functional Integrity, A. M. Morris, T. M. Treweek, J. A. Aquilina, J. A. Carver, Mark J. Walker

Faculty of Science - Papers (Archive)

Small heat shock proteins (sHsps) are intracellular molecular chaperones that prevent the aggregation and precipitation of partially-folded and destabilized proteins. sHsps are comprised of an evolutionarily conserved region of 80-100 amino acids denoted the α-crystallin domain which is flanked by regions of variable sequence and length: the N-terminal domain and the C-terminal extension. Whilst the two domains are known to be involved in organization of the quaternary structure of sHsps and interaction with their target proteins, the role of the C-terminal extension is enigmatic. Despite the lack of sequence similarity, the C-terminal extension of mammalian sHsps is typically a short ...


Inkjet Printing: A Viable Tool For Processing Polymer Carbon Nanotube Composites, Marc In Het Panhuis, William R. Small Jan 2008

Inkjet Printing: A Viable Tool For Processing Polymer Carbon Nanotube Composites, Marc In Het Panhuis, William R. Small

Faculty of Science - Papers (Archive)

The inkjet processing of water dispersable polymer carbon nanotube composite materials is reported. Single printed layers displayed good optical transparency, sheet resistance, and conductivity. It is demonstrated that an alcohol sensor based on a single printed layer of polymer carbon nanotube composite could operate at a lower voltage compared to a sensor based on a single printed layer of the polymer.


Validation Of Ace-Fts V2.2 Methane Profiles From The Upper Troposphere To Lower Mesosphere, M De Maziere, C Vigouroux, P F. Bernath, P Baron, T Blumenstock, C Boone, C Brogniez, V Catoire, M Coffey, P Duchatelet, David W. Griffith, J Hannigan, Y Kasai, I Kramer, Nicholas B. Jones, E Mahieu, G L. Manney, C Piccolo, C Randall, C Robert, C Senten, K Strong, J R. Taylor, C Tetard, K A. Walker, S Wood Jan 2008

Validation Of Ace-Fts V2.2 Methane Profiles From The Upper Troposphere To Lower Mesosphere, M De Maziere, C Vigouroux, P F. Bernath, P Baron, T Blumenstock, C Boone, C Brogniez, V Catoire, M Coffey, P Duchatelet, David W. Griffith, J Hannigan, Y Kasai, I Kramer, Nicholas B. Jones, E Mahieu, G L. Manney, C Piccolo, C Randall, C Robert, C Senten, K Strong, J R. Taylor, C Tetard, K A. Walker, S Wood

Faculty of Science - Papers (Archive)

The ACE-FTS (Atmospheric Chemistry Experiment Fourier Transform Spectrometer) solar occultation instrument that was launched onboard the Canadian SCISAT-1 satellite in August 2003 is measuring vertical profiles from the upper troposphere to the lower mesosphere for a large number of atmospheric constituents. Methane is one of the key species. The version v2.2 data of the ACE-FTS CH4 data have been compared to correlative satellite, balloon-borne and ground-based Fourier transform infrared remote sensing data to assess their quality. The comparison results indicate that the accuracy of the data is within 10% in the upper troposphere lower stratosphere, and within 25% in ...


Synthesis Of Castanospermine, Theeraphan Machan, Andrew S. Davis, Boonsom Liawruangrath, Stephen G. Pyne Jan 2008

Synthesis Of Castanospermine, Theeraphan Machan, Andrew S. Davis, Boonsom Liawruangrath, Stephen G. Pyne

Faculty of Science - Papers (Archive)

The diastereoselective synthesis of castanospermine is described in 11 synthetic steps from L-xylose. The borono-Mannich reaction between L-xylose, allylamine and (E)-styrene boronic acid gives a tetrahydroxy amine with the desired configurations for C-6, C-7, C-8 and C-8a in the target molecule. A novel pyrrolo[1,2-c]oxazol-3-one precursor was employed to allow for the control of pi-facial diastereoselectivity in an osmium(VIII)-catalysed syn-dihydroxylation (DH) reaction. A regioselective ring-opening of the cyclic sulfate derivative of the resulting diol then secured the C-1 hydroxyl group of castanospermine with the correct configuration. A Mitsunobu cyclization then provided di-O ...


Scaling The Rural: Reflections On Rural Cultural Studies, Christopher R. Gibson, Andrew W. Gorman-Murray, Kate Darian-Smith Jan 2008

Scaling The Rural: Reflections On Rural Cultural Studies, Christopher R. Gibson, Andrew W. Gorman-Murray, Kate Darian-Smith

Faculty of Science - Papers (Archive)

How can cultural analysis be brought to bear on the rural? This central question for rural cultural studies prompts our exploration of how the rural has been delineated and interpreted in the developed West, as a departure for thinking about new intellectual approaches to rurality that span spaces, times and academic disciplines. In this paper we adopt a broad schema, discussing insights from rural studies, cultural geography and history. As Michael Woods ( Rural Geography ) has handily pointed out, 'rural' is

one of those curious words which everyone thinks they know what it means, but which is actually very difficult to ...


Evaluation Of A Low Cost Wireless Chemical Sensor Network For Environmental Monitoring, Jer Hayes, Stephen Beirne, King-Tong Lau, Dermot Diamond Jan 2008

Evaluation Of A Low Cost Wireless Chemical Sensor Network For Environmental Monitoring, Jer Hayes, Stephen Beirne, King-Tong Lau, Dermot Diamond

Faculty of Science - Papers (Archive)

We present work on the development and testing of a low-cost wireless chemical sensor network (WCSN) for monitoring irritant/toxic gases in the environment. The WCSN used in this work takes advantage of recent advances in low power wireless communication platforms and uses colorimetric sensors to detect the presence of certain target gases. This sensor network adopts a star configuration and performs one way RF communications from individual sensor nodes to the base-station. Each node in the network is composed of a multiple sensor platform that measures light intensity, temperature and motion. The light sensor was used as the chemical ...


The Key Importance Of Soy Isoflavone Bioavailability To Understanding Health Benefits, T. A. Larkin, William E. Price, L. Astheimer Jan 2008

The Key Importance Of Soy Isoflavone Bioavailability To Understanding Health Benefits, T. A. Larkin, William E. Price, L. Astheimer

Faculty of Science - Papers (Archive)

Research over the past two decades has provided significant epidemiological and other evidence for the health benefits of the consumption of soy-based foods. A large number of dietary intervention studies have examined the effects of soy isoflavones on risk factors for cardiovascular disease and hormone-dependent cancers. However, these report large variability in outcome measures, very limited reproducibility between studies and in some cases, controversy between results of clinical trials using dietary soy or soy protein and isoflavone supplementation. This highlights a major gap in our understanding of soy isoflavone uptake, metabolism, distribution, and overall bioavailability. There are many potential factors ...


Vegetation Over Hydrologic Control Of Sediment Transport Over The Past 100,000 Yr, Anthony Dosseto, Simon Turner, P P Hesse, Kate Maher, Kirstie Fryirs Jan 2008

Vegetation Over Hydrologic Control Of Sediment Transport Over The Past 100,000 Yr, Anthony Dosseto, Simon Turner, P P Hesse, Kate Maher, Kirstie Fryirs

Faculty of Science - Papers (Archive)

No abstract provided.