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Articles 1 - 30 of 97
Full-Text Articles in Physical Sciences and Mathematics
Living In A Land Of Fire, R. J. Whelan, P. Kanowski, M. Gill, A. Andersen
Living In A Land Of Fire, R. J. Whelan, P. Kanowski, M. Gill, A. Andersen
Faculty of Science - Papers (Archive)
Fires are an inherent part of the Australian environment. They cannot be prevented, but the risks they pose — to life, health, property and infrastructure, production systems, and to environment values — can be minimised through systematic evaluation and strategic planning and management. Fires have a fundamental and irreplaceable role in sustaining many of Australia’s natural ecosystems and ecological processes, and they are a valuable tool for achieving many land management objectives. However, if they are too frequent or too infrequent, too severe or too mild, or mistimed, they can erode ecosystem ‘health’ and biodiversity and compromise other land management …
Uv-B Screening Potential Is Higher In Two Cosmopolitan Moss Species Than In A Co-Occurring Antarctic Endemic Moss – Implications Of Continuing Ozone Depletion, J. L. Dunn, Sharon A. Robinson
Uv-B Screening Potential Is Higher In Two Cosmopolitan Moss Species Than In A Co-Occurring Antarctic Endemic Moss – Implications Of Continuing Ozone Depletion, J. L. Dunn, Sharon A. Robinson
Faculty of Science - Papers (Archive)
Concentrations of UV-B absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Pigment concentrations were compared with a range of climatic variables to determine if there was evidence that pigments were induced by UV-B radiation, or other environmental parameters, and secondly if there were differences between species in their pigment responses. Significant seasonal differences in the potential UV-B screening pigments were found, with the two cosmopolitan species Bryum pseudotriquetrum and Ceratodon purpureus appearing better protected from the potentially damaging effects of ozone depletion than the Antarctic endemic Schistidium antarctici. Bryum pseudotriquetrum accumulated …
Review Of Structure And Basement Control Of The Lapstone Structural Complex, Sydney Basin, Eastern New South Wales, C. L. Fergusson
Review Of Structure And Basement Control Of The Lapstone Structural Complex, Sydney Basin, Eastern New South Wales, C. L. Fergusson
Faculty of Science - Papers (Archive)
In the western Sydney Basin, the Lapstone Structural Complex is a major north-trending association of monoclines and faults that forms the frontal ridge of the Blue Mountains Plateau. At Kurrajong Heights, the Lapstone Structural Complex is dominated by an east-facing monocline with a gently dipping central limb containing several different homoclinal segments. At the Hawkesbury Lookout section, strata are steeply dipping to near vertical along the main east-facing monocline. The Lapstone Structural Complex has been related to either steep east-dipping extensional faulting or to moderate to steep west-dipping contraction faults. Strike-slip displacement may also have played a role in its …
Synthesis Of Some Cyclic Indolic Peptoids As Potential Antibacterials, Vicki S. Au, John B. Bremner, Jonathan Coates, Paul A. Keller, Stephen G. Pyne
Synthesis Of Some Cyclic Indolic Peptoids As Potential Antibacterials, Vicki S. Au, John B. Bremner, Jonathan Coates, Paul A. Keller, Stephen G. Pyne
Faculty of Science - Papers (Archive)
The synthesis of cyclic peptoids containing an indole hydrophobic scaffold has been realised through the ring-closing metathesis of diallylated precursors. The precursors and their cyclic counterparts possessed poor antibacterial activity in contrast to previously reported cyclic peptoids containing hydrophobic scaffolds.
The Maintenance Of High Affinity Plasminogen Binding By Group A Streptococcal Plasminogen-Binding M-Like Protein Is Mediated By Arginine And Histidine Residues Within The A1 And A2 Repeat Domains., Martina L. Sanderson-Smith, Mark J. Walker, Marie Ranson
The Maintenance Of High Affinity Plasminogen Binding By Group A Streptococcal Plasminogen-Binding M-Like Protein Is Mediated By Arginine And Histidine Residues Within The A1 And A2 Repeat Domains., Martina L. Sanderson-Smith, Mark J. Walker, Marie Ranson
Faculty of Science - Papers (Archive)
Subversion of the plasminogen activation system is implicated in the virulence of group A streptococci (GAS). GAS displays receptors for the human zymogen plasminogen on the cell surface, one of which is the plasminogen-binding group A streptococcal M-like protein (PAM). The plasminogen binding domain of PAM is highly variable, and this variation has been linked to host selective immune pressure. Site-directed mutagenesis of full-length PAM protein from an invasive GAS isolate was undertaken to assess the contribution of residues in the a1 and a2 repeat domains to plasminogen binding function. Mutagenesis to alanine of key plasminogen binding lysine residues in …
Fundamental And Biotechnological Applications Of Neutron Scattering Measurements For Macromolecular Dynamics, M. Tehei, R. Daniel, G. Zaccai
Fundamental And Biotechnological Applications Of Neutron Scattering Measurements For Macromolecular Dynamics, M. Tehei, R. Daniel, G. Zaccai
Faculty of Science - Papers (Archive)
To explore macromolecular dynamics on the picosecond timescale, we used neutron spectroscopy. First, molecular dynamics were analyzed for the hyperthermophile malate dehydrogenase from Methanococcus jannaschii and a mesophilic homologue, the lactate dehydrogenase from Oryctolagus cunniculus muscle. Hyperthermophiles have elaborate molecular mechanisms of adaptation to extremely high temperature. Using a novel elastic neutron scattering approach that provides independent measurements of the global flexibility and of the structural resilience (rigidity), we have demonstrated that macromolecular dynamics represents one of these molecular mechanisms of thermoadaptation. The flexibilities were found to be similar for both enzymes at their optimal activity temperature and the resilience …
International Assessments Of The Vulnerability Of The Coastal Zone To Climate Change, Including An Australian Perspective, P. A. Abuodha, C. D. Woodroffe
International Assessments Of The Vulnerability Of The Coastal Zone To Climate Change, Including An Australian Perspective, P. A. Abuodha, C. D. Woodroffe
Faculty of Science - Papers (Archive)
Australia, and considers global, and in some cases national, assessments of vulnerability to climate change to evaluate the implications for the Australian coast, or to assess the applicability of particular approaches and methods to Australia. Climate change vulnerability assessment aims at assisting policymakers in adequately responding to the challenge of climate change by investigating how projected changes in the Earth's climate may affect natural systems and human activities. Generally studies consider, exposure or susceptibility of natural coastal systems, the effect on socio-economic systems (“impact assessment”), and/or how human actions may reduce adverse effects of climate change on those systems or …
Trigger For Group A Streptococcal M1t1 Invasive Disease, J. N. Cole, Jason D. Mcarthur, F. C. Mckay, Martina L. Sanderson-Smith, Amanda J. Cork, Marie Ranson, M. Rohde, A. Itzek, H. Sun, D. Ginsburg, M. Kotb, V. Nizet, G. S. Chhatwal, Mark J. Walker
Trigger For Group A Streptococcal M1t1 Invasive Disease, J. N. Cole, Jason D. Mcarthur, F. C. Mckay, Martina L. Sanderson-Smith, Amanda J. Cork, Marie Ranson, M. Rohde, A. Itzek, H. Sun, D. Ginsburg, M. Kotb, V. Nizet, G. S. Chhatwal, Mark J. Walker
Faculty of Science - Papers (Archive)
The globally disseminated Streptococcus pyogenes M1T1 clone causes a number of highly invasive human diseases. The transition from local to systemic infection occurs by an unknown mechanism; however invasive M1T1 clinical isolates are known to express significantly less cysteine protease SpeB than M1T1 isolates from local infections. Here, we show that in comparison to the M1T1 strain 5448, the isogenic mutant ∆speB accumulated 75-fold more human plasmin activity on the bacterial surface following incubation in human plasma. Human plasminogen was an absolute requirement for M1T1 strain 5448 virulence following subcutaneous infection of humanized plasminogen transgenic mice. S. pyogenes M1T1 isolates …
Suburban Life And The Boundaries Of Nature: Resilience And Rupture In Australian Backyard Gardens, Lesley M. Head, Pat Muir
Suburban Life And The Boundaries Of Nature: Resilience And Rupture In Australian Backyard Gardens, Lesley M. Head, Pat Muir
Faculty of Science - Papers (Archive)
Despite an academic shift from dualistic to hybrid frameworks of culture/nature relations, separationist paradigms of environmental management have great resilience and vernacular appeal. The conditions under which they are reinforced, maintained or ruptured need more detailed attention because of the urgent environmental challenges of a humanly transformed earth. We draw on research in 265 Australian backyard gardens, focusing on two themes where conceptual and material bounding practices intertwine; spatial boundary-making and native plants. We trace the resilience of separationist approaches in the Australian context to the overlay of indigeneity/ non-indigeneity atop other dualisms, and their rupture to situations of close …
Quality Control Of Protein Folding In Extracellular Space, J. J. Yerbury, E. M. Stewart, A. R. Wyatt, M. R. Wilson
Quality Control Of Protein Folding In Extracellular Space, J. J. Yerbury, E. M. Stewart, A. R. Wyatt, M. R. Wilson
Faculty of Science - Papers (Archive)
The pathologies of many serious human diseases are thought to develop from the effects of intra- or extracellular aggregates of non-native proteins. Inside cells, chaperone and protease systems regulate protein folding; however, little is known about any corresponding mechanisms that operate extracellularly. The identification of these mechanisms is important for the development of new disease therapies. This review briefly discusses the consequences of protein misfolding, the intracellular mechanisms that control folding and the potential corresponding extracellular control processes. Finally, a new speculative model is described, which proposes that newly discovered extracellular chaperones bind to exposed regions of hydrophobicity on non-native, …
The Synthesis And Testing Of Arenearylpyrimidylmethanes (Aapm) As Anti-Malarial Agents, N. R. Yepuri, R. Haritakul, R. Griffith, S. P. Leach, Paul A. Keller
The Synthesis And Testing Of Arenearylpyrimidylmethanes (Aapm) As Anti-Malarial Agents, N. R. Yepuri, R. Haritakul, R. Griffith, S. P. Leach, Paul A. Keller
Faculty of Science - Papers (Archive)
The anti-malarial activity of the arenearylpyrimidylmethane (AAPM) class of compounds emerged from database searching of a pharmacophore. A new 2 step synthesis of the AAPM scaffold is reported and subsequent substitution yielded a short synthesis of the lead anti-malarial compound. The presence of atropisomerism in this class of compounds is also reported for the first time.
Climate Change Manipulations Show Antarctic Flora Is More Strongly Affected By Elevated Nutrients Than Water, J. Wasley, Sharon A. Robinson, C. E. Lovelock, M. Popp
Climate Change Manipulations Show Antarctic Flora Is More Strongly Affected By Elevated Nutrients Than Water, J. Wasley, Sharon A. Robinson, C. E. Lovelock, M. Popp
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. The indirect effects of climate warming, including changes to the availability of key environmental resources, such as water and nutrients, are likely to have a greater impact upon continental Antarctic terrestrial ecosystems than the effects of fluctuations in temperature alone. To investigate the likely impacts of a wetter climate on Antarctic terrestrial communities a multi-season, manipulative field experiment was conducted in the floristically important Windmill Islands region of East Antarctica. Four …
Reactions Of Iminoglycines With C60 Fullerene And Their Unambiguous Characterisation Using Nmr Spectroscopy, Paul A. Keller, Stephen G. Pyne, Bill C. Hawkins
Reactions Of Iminoglycines With C60 Fullerene And Their Unambiguous Characterisation Using Nmr Spectroscopy, Paul A. Keller, Stephen G. Pyne, Bill C. Hawkins
Faculty of Science - Papers (Archive)
This review examines the addition of iminoglycine derivatives to C60, yielding protected fullerenyl pyrroline derivatives. Subsequent reduction with sodium cyanoborohydride produces ring-opening adducts which are protected fullerenyl α-amino acids. Pyrroline bisadducts can be produced using tethers to link two iminoglycine units together, and variations include combining with malonate reactive groups this giving rise to interesting observations as to the regioselectivity of such reactions. All derivatives are fully characterised by NMR spectroscopy, and in the case of bis-adducts, the regioselectivity is determined from 1H/13C and 13C/13C connectivity patterns using HMBC and INADEQUATE experiments, respectively, thus eliminating the need for comparative techniques …
The Role Of The Hpa Axis In Psychiatric Disorders And Crf Antagonists As Potential Treatments, Paul A. Keller, A. Mccluskey, J. Morgan, S. M. O'Connor
The Role Of The Hpa Axis In Psychiatric Disorders And Crf Antagonists As Potential Treatments, Paul A. Keller, A. Mccluskey, J. Morgan, S. M. O'Connor
Faculty of Science - Papers (Archive)
An overview of the links between the Hypothalamic-Pituitary-Adrenal (HPA) axis and psychiatric disorders is presented. The current treatments are outlined, indicating that they are insufficient to meet the needs of those that suffer from these affective disorders. Therefore, there is an urgent need for the generation of new therapeutics, in particular, against new targets. The association of the corticotrophin releasing factor (CRF) and the HPA axis indicates that CRF antagonists should be beneficial as potential therapeutics.
Predicting Impacts Of Fuel Reduction For Asset Protection On Threatened Species, R. J. Whelan, L. Collins, R. Loemker
Predicting Impacts Of Fuel Reduction For Asset Protection On Threatened Species, R. J. Whelan, L. Collins, R. Loemker
Faculty of Science - Papers (Archive)
Fuel reduction in bushland adjacent to urban development is an important component of bushfire management to protect lives and properties. In many urban areas, the objective of property protection by fuel reduction conflicts with biodiversity management objectives. Conserving threatened species in such situations will require information on spatial distributions of these species in the landscape. We used GIS modelling to predict the likely impacts of strategic fire advantage zones (SFAZs) on two threatened species in the Shoalhaven region of NSW: the eastern bristlebird and the glossy black cockatoo. We used current knowledge of the association between these animals and vegetation …
The Ecology Of Fire – Developments Since 1995 And Outstanding Questions, R. J. Whelan
The Ecology Of Fire – Developments Since 1995 And Outstanding Questions, R. J. Whelan
Faculty of Science - Papers (Archive)
Extract - Bushfire is on the agenda more than ever… internationally. The attention of the public and politicians has been captured by extensive media coverage on big fires in the last 5 years: Portugal, France, California, Colorado, South Africa, Indonesia, the Amazon – and 2001-02 and 2002-03 in SE Australia. The various enquiries that have followed these fire events, at least in Australia (e.g. the NSW Joint Select Committee on Bushfires 2002, the Victorian Government’s Inquiry into the 2002-2003 Victorian Bushfires – Esplin et al. 2003, the House of Representatives Select Committee Inquiry into the Recent Australian Bushfires – Nairn …
P159 Is A Proteolytically Processed, Surface Adhesin Of Mycoplasma Hyopneumoniae: Defined Domains Of P159 Bind Heparin And Promote Adherence To Eukaryote Cells., T. A. Burnett, K. Dinkla, M. Rohde, G. S. Chhatwal, C. Uphoff, M. Srivasta, S. J. Cordwell, S. Geary, X. Liao, F. C. Minion, Mark J. Walker, S. P. Djordjevic
P159 Is A Proteolytically Processed, Surface Adhesin Of Mycoplasma Hyopneumoniae: Defined Domains Of P159 Bind Heparin And Promote Adherence To Eukaryote Cells., T. A. Burnett, K. Dinkla, M. Rohde, G. S. Chhatwal, C. Uphoff, M. Srivasta, S. J. Cordwell, S. Geary, X. Liao, F. C. Minion, Mark J. Walker, S. P. Djordjevic
Faculty of Science - Papers (Archive)
Mycoplasma hyopneumoniae, the causative agent of porcine enzootic pneumonia, colonises the respiratory cilia of affected swine causing significant economic losses to swine production worldwide. Heparin is known to inhibit adherence of M. hyopneumoniae to porcine epithelial cilia. M. hyopneumoniae cells bind heparin but the identity of the heparin-binding proteins is limited. Proteomic analysis of M. hyopneumoniae lysates identified 27 kDa (P27), 110 kDa (P110) and 52 kDa (P52) proteins representing different regions of a 159 kDa (P159) protein derived from mhp494. These cleavage fragments were surface located and present at all growth stages. Following purification of 4 recombinant proteins spanning …
The Fragmentation Pathways Of Protonated Amiton In The Gas Phase: Towards The Structural Characterisation Of Organophosphorus Chemical Warfare Agents By Electrospray Ionisation Tandem Mass Spectrometry, S. Ellis-Steinborner, A. Ramachandran, Stephen J. Blanksby
The Fragmentation Pathways Of Protonated Amiton In The Gas Phase: Towards The Structural Characterisation Of Organophosphorus Chemical Warfare Agents By Electrospray Ionisation Tandem Mass Spectrometry, S. Ellis-Steinborner, A. Ramachandran, Stephen J. Blanksby
Faculty of Science - Papers (Archive)
Amiton (O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothiolate), otherwise known as VG, is listed in Schedule 2 of the Chemical Weapons Convention (CWC) and has a structure closely related to VX (O-ethyl-S-(2-diisopropylamino)ethyl methylphosphonothiolate). Fragmentation of protonated VG in the gas phase was performed using an electrospray ionisation ion trap mass spectrometer (ESI-ITMS) and revealed several characteristic product ions. Quantum chemical calculations provide the most probable structures for these ions as well as the likely unimolecular mechanisms by which they are formed. The decomposition pathways predicted by computation are consistent with deuterium labeling studies. The combination of experimental and theoretical data suggests that the fragmentation pathways …
Phylloxera Infested Grapevines Have Reduced Chlorophyll And Increased Photoprotective Pigment Content – Can Leaf Pigment Composition Aid Pest Detection?, A. L. Blanchfield, Sharon A. Robinson, L. J. Renzullo, K. S. Powell
Phylloxera Infested Grapevines Have Reduced Chlorophyll And Increased Photoprotective Pigment Content – Can Leaf Pigment Composition Aid Pest Detection?, A. L. Blanchfield, Sharon A. Robinson, L. J. Renzullo, K. S. Powell
Faculty of Science - Papers (Archive)
Grape phylloxera is a root-feeding pest of grapevines. In Australia, phylloxera infested vineyards are subjected to quarantine restrictions and early detection remains vital for the timely implementation of post-outbreak quarantine protocols. Current detection methods rely on time-consuming ground surveying which involves detailed examination of grapevine (Vitis vinifera L.) root systems. Leaf pigment composition is often a sensitive indicator of plant stress. The increasing popularity of remote sensing systems, which exploit those changes in pigments observed with plant stress, offers a real possibility for the development of a phylloxera specific remote detection system. Our objective was to investigate changes in grapevine …
Some Like It Wet – Biological Characteristics Underpinning Tolerance Of Extreme Water Stress Events In Antarctic Bryophytes., J. Wasley, Sharon A. Robinson, C. E. Lovelock, M. Popp
Some Like It Wet – Biological Characteristics Underpinning Tolerance Of Extreme Water Stress Events In Antarctic Bryophytes., J. Wasley, Sharon A. Robinson, C. E. Lovelock, M. Popp
Faculty of Science - Papers (Archive)
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events. This study investigated the relative ability of three Antarctic moss species to tolerate physiological extremes in water availability and identified physiological, morphological, and biochemical characteristics that assist species performance under such conditions. Tolerance of desiccation and submergence was investigated using chlorophyll fluorescence during a series of field- and laboratory-based water stress events. Turf water retention and degree of natural habitat submergence were determined from gametophyte shoot size and density and ?13C signatures respectively. Finally, compounds likely to assist membrane structure and function during desiccation …
The Cape Grim Scanning Uv Spectrometer, Stephen R. Wilson
The Cape Grim Scanning Uv Spectrometer, Stephen R. Wilson
Faculty of Science - Papers (Archive)
The scanning spectral radiometer operating at Cape Grim provides estimates of irradiance for several spectral regions between 298 and 400 nm. The physical characteristics of the spectrometer system are documented, including the wavelength shift and cosine response of the detector head. The procedures used for the spectrometer’s in situ calibration are also described. The scatter in the resulting calibrations is quantified for the period between 2000 and 2003, providing an estimate of the (wavelength dependent) uncertainty in the measurement.
Dynamics Of Immobilized And Native Escherichia Coli Dihydrofolate Reductase By Quasielastic Neutron Scattering, M. Tehei, J. Smith, C. Monk, J. Ollivier, M. Oettl, V. Kurkal, J. L. Finney, R. M. Daniel
Dynamics Of Immobilized And Native Escherichia Coli Dihydrofolate Reductase By Quasielastic Neutron Scattering, M. Tehei, J. Smith, C. Monk, J. Ollivier, M. Oettl, V. Kurkal, J. L. Finney, R. M. Daniel
Faculty of Science - Papers (Archive)
The internal dynamics of native and immobilized Escherichia coli dihydrofolate reductase (DHFR) have been examined using incoherent quasielastic neutron scattering. These results reveal no difference between the high frequency vibration mean-square displacement of the native and the immobilized E. coli DHFR. However, length-scale-dependent, picosecond dynamical changes are found. On longer length scales, the dynamics are comparable for both DHFR samples. On shorter length scales, the dynamics is dominated by local jump motions over potential barriers. The residence time for the protons to stay in a potential well is t=7.95 ps for the native DHFR and t=20.36 ps for the immobilized …
Contribution Of The Alternative Pathway To Respiration During Thermogenesis In Flowers Of The Sacred Lotus, Jennifer R. Watling, Sharon A. Robinson, Roger S. Seymour
Contribution Of The Alternative Pathway To Respiration During Thermogenesis In Flowers Of The Sacred Lotus, Jennifer R. Watling, Sharon A. Robinson, Roger S. Seymour
Faculty of Science - Papers (Archive)
We report results from in vivo measurements, using oxygen isotope discrimination techniques, of fluxes through the alternative and cytochrome respiratory pathways in thermogenic plant tissue, the floral receptacle of the sacred lotus (Nelumbo nucifera). Fluxes through both pathways were measured in thermoregulating flowers undergoing varying degrees of thermogenesis in response to ambient temperature. Significant increases in alternative pathway flux were found in lotus receptacles with temperatures 16°C to 20°C above ambient, but not in those with lesser amounts of heating. Alternative pathway flux in the hottest receptacles was 75% of the total respiratory flux. In contrast, fluxes through the cytochrome …
Imagining King Street In The Gay/Lesbian Media, Andrew W. Gorman-Murray
Imagining King Street In The Gay/Lesbian Media, Andrew W. Gorman-Murray
Faculty of Science - Papers (Archive)
The identities of places do not exist a priori, but are derived from various representations constructed through social and cultural processes. The media is a key producer and disseminator of place images and identities in contemporary society. This paper examines the way the gay/lesbian media have imagined the King Street precinct, one of Sydney’s ostensible gay/lesbian localities, between 2003 and 2005. Through textual analyses of these media commentaries, I argue that King Street is often represented in comparison with Sydney’s other notable gay/lesbian space, the Oxford Street precinct. I find, moreover, that this imagined binary relationship is shifting and changing: …
Sampling Patchily Distributed Taxa: A Case Study Using Cost-Benefit Analyses For Sponges And Ascidians In Coastal Lakes Of New South Wales, Australia, P. B. Barnes, A. R. Davis, D. E. Roberts
Sampling Patchily Distributed Taxa: A Case Study Using Cost-Benefit Analyses For Sponges And Ascidians In Coastal Lakes Of New South Wales, Australia, P. B. Barnes, A. R. Davis, D. E. Roberts
Faculty of Science - Papers (Archive)
Estuaries worldwide are under increasing threat from human impacts. Because much of their fauna remains unstudied and in many cases undescribed, these systems present real challenges for effective management. In eastern Australia the study of estuarine fauna is often further complicated by its patchy distributions. This is particularly the case for assemblages of sessile invertebrates in coastal saline lakes. This study quantified distributions of sponges and ascidians at a hierarchy of spatial scales in the seagrass meadows of 2 coastal saline lakes in New South Wales, Australia. Nine species of sponge, many of which were undescribed, and 3 species of …
The Loss Of Carbon Dioxide From Activated Perbenzoate Anions In The Gas Phase: Unimolecular Rearrangement Via Epoxidation Of The Benzene Ring, David G. Harman, Aravind Ramachandran, Michelle Gracanin, Stephen J. Blanksby
The Loss Of Carbon Dioxide From Activated Perbenzoate Anions In The Gas Phase: Unimolecular Rearrangement Via Epoxidation Of The Benzene Ring, David G. Harman, Aravind Ramachandran, Michelle Gracanin, Stephen J. Blanksby
Faculty of Science - Papers (Archive)
The unimolecular reactivities of a range of perbenzoate anions (X−C6H5CO3-), including the perbenzoate anion itself (X = H), nitroperbenzoates (X = para-, meta-, ortho-NO2), and methoxyperbenzoates (X = para-, meta-OCH3) were investigated in the gas phase by electrospray ionization tandem mass spectrometry. The collision-induced dissociation mass spectra of these compounds reveal product ions consistent with a major loss of carbon dioxide requiring unimolecular rearrangement of the perbenzoate anion prior to fragmentation. Isotopic labeling of the perbenzoate anion supports rearrangement via an initial nucleophilic aromatic …
Places Of Reconciliation: Gay, Lesbian And Transgender Place-Based Belongings In A Regional Australian Centre, Gordon R. Waitt, Andrew W. Gorman-Murray
Places Of Reconciliation: Gay, Lesbian And Transgender Place-Based Belongings In A Regional Australian Centre, Gordon R. Waitt, Andrew W. Gorman-Murray
Faculty of Science - Papers (Archive)
Place-based belonging is a key concern of geographical work on sexuality. Marginalised through practices of heterosexism and homophobia, gay men, lesbians and other sexual minorities have a heightened awareness of where they belong – of where they can perform sexual difference. Much research here focuses on place-based belonging in metropolitan centres. There is less consideration of how sexual minorities sustain place-based belonging in regional centres, which are also believed to exhibit higher levels of homophobia. Drawing on in-depth interviews, we examine how sexual minorities generate place-based belonging in Townsville. We argue that place-based belonging be understood as an ongoing relational …
Targeting C-Reactive Protein For The Treatment Of Cardiovascular Disease, Mark B. Pepys, Gideon M. Hirschfield, Glenys A. Tennent, J Ruth Gallimore, Melvyn C. Kahan, Vittorio Bellotti, Philip N. Hawkins, Rebecca M. Myers, Martin D. Smith, Alessandra Polara, Alexander J. A Cobb, Steven V. Ley, J. Andrew Aquilina, Carol V. Robinson, Isam Sharif, Gillian A. Gray, Caroline A. Sabin, Michelle C. Jenvey, Simon E. Kolstoe, Darren Thompson, Stephen P. Wood
Targeting C-Reactive Protein For The Treatment Of Cardiovascular Disease, Mark B. Pepys, Gideon M. Hirschfield, Glenys A. Tennent, J Ruth Gallimore, Melvyn C. Kahan, Vittorio Bellotti, Philip N. Hawkins, Rebecca M. Myers, Martin D. Smith, Alessandra Polara, Alexander J. A Cobb, Steven V. Ley, J. Andrew Aquilina, Carol V. Robinson, Isam Sharif, Gillian A. Gray, Caroline A. Sabin, Michelle C. Jenvey, Simon E. Kolstoe, Darren Thompson, Stephen P. Wood
Faculty of Science - Papers (Archive)
Complement-mediated inflammation exacerbates the tissue injury of ischaemic necrosis in heart attacks and strokes, the most common causes of death in developed countries. Large infarct size increases immediate morbidity and mortality and, in survivors of the acute event, larger non-functional scars adversely affect long-term prognosis. There is thus an important unmet medical need for new cardioprotective and neuroprotective treatments. We have previously shown that human C-reactive protein (CRP), the classical acute-phase protein that binds to ligands exposed in damaged tissue and then activates complement1, increases myocardial and cerebral infarct size in rats subjected to coronary or cerebral artery ligation, respectively2,3. …
Experimental Manipulation Of Shade, Silt, Nutrients And Salinity On The Temperate Reef Sponge Cymbastela Concentrica, D. E. Roberts, A. R. Davis, S. P. Cummins
Experimental Manipulation Of Shade, Silt, Nutrients And Salinity On The Temperate Reef Sponge Cymbastela Concentrica, D. E. Roberts, A. R. Davis, S. P. Cummins
Faculty of Science - Papers (Archive)
Discharge of sewage effluent into the ocean has been shown to cause changes in the structure and distribution of a range of biological assemblages, including those dominated by sponges. To date, the underlying mechanisms by which exposure to sewage alters such assemblages is unclear, although a number of potential models have been proposed. Here, a series of manipulative field experiments were done using the phototrophic spongeCymbastela concentrica. Hypotheses from the general models that increased shade, silt, nutrients or salinity gradients were tested to find a cause for observed declines in populations exposed to sewage. Changes in the variables …
Cyclicity In The Nearshore Marine To Coastal, Lower Permian, Pebbley Beach Formation, Southern Sydney Basin, Australia: A Record Of Relative Sea-Level Fluctuations At The Close Of The Late Palaeozoic Gondwanan Ice Age, Brian G. Jones, Stuart C. Tye, James A. Maceachern, Kerrie L. Bann, Christopher R. Fielding
Cyclicity In The Nearshore Marine To Coastal, Lower Permian, Pebbley Beach Formation, Southern Sydney Basin, Australia: A Record Of Relative Sea-Level Fluctuations At The Close Of The Late Palaeozoic Gondwanan Ice Age, Brian G. Jones, Stuart C. Tye, James A. Maceachern, Kerrie L. Bann, Christopher R. Fielding
Faculty of Science - Papers (Archive)
The Lower Permian (Artinskian to Sakmarian) Pebbley Beach Formation of the southernmost Sydney Basin in New South Wales, Australia, records sediment accumulation in shallow marine to coastal environments at the close of the Late Palaeozoic Gondwanan ice age. This paper presents a sequence stratigraphic re-evaluation of the upper half of the unit based on the integration of sedimentology and ichnology. Ten facies are recognized, separated into two facies associations. Facies Association A (7 facies) comprises variably bioturbated siltstones and sandstones with marine body fossils, interpreted to record sediment accumulation in open marine environments ranging from lower offshore to middle shoreface …