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Articles 1 - 30 of 89
Full-Text Articles in Physical Sciences and Mathematics
Measurements Of Trace Gas Emissions From Australian Forest Fires And Correlations With Coincident Measurements Of Aerosol Optical Depth, Clare Paton-Walsh, N. B. Jones, Stephen R. Wilson, V Haverd, A. Meier, D. W. Griffith
Measurements Of Trace Gas Emissions From Australian Forest Fires And Correlations With Coincident Measurements Of Aerosol Optical Depth, Clare Paton-Walsh, N. B. Jones, Stephen R. Wilson, V Haverd, A. Meier, D. W. Griffith
Faculty of Science - Papers (Archive)
We present vertically integrated measurements of C2H2, C2H4, C2H6, HCOOH, CO, H2CO, HCN and NH3 through smoke plumes from Australian forest fires measured by ground-based solar absorption spectroscopy. The column amounts of these gases are highly correlated with simultaneous, co-located measurements of aerosol optical depth, providing a potential method of mapping biomass-burning emissions using satellite measurements of aerosol optical depth. We have calculated emission ratios relative to CO for the trace gases using aerosol optical depth as a proxy for CO and converted to emission factors by using an average emission factor for CO from literature measurements of extra-tropical forest …
Living With Trees – Perspectives From The Suburbs, Lesley M. Head, Pat Muir
Living With Trees – Perspectives From The Suburbs, Lesley M. Head, Pat Muir
Faculty of Science - Papers (Archive)
A study of suburban backyards and backyarders in Sydney and Wollongong revealed evidence of attitudes and behaviours in relation to trees. Attitudes are characterised under themes that indicate conditions of tolerance and belonging. They include attachment/risk, order/freedom and nativeness/alienness. While love is common, high levels of suspicion and intolerance towards trees in the suburban context are more common. Our findings confirm and throw further light on previous work indicating that many Australians have very partitioned views of the world in relationto where humans and nonhuman lifeforms belong. This partitioning must be understood in conceptual as well as spatial terms.
Culture As Concept And Influence In Environmental Research And Management, Lesley M. Head, D. Trigger, J. Mulcock
Culture As Concept And Influence In Environmental Research And Management, Lesley M. Head, D. Trigger, J. Mulcock
Faculty of Science - Papers (Archive)
Given that human activities have been implicated in the vast majority of contemporary environmental problems, it might be expected that research effort into those activities and the attitudes from which they stem would be both strongly supported by funding agencies, and of central interest to environmental scientists and land managers. In this paper we focus on an undervalued area of environmental humanities research—cultural analysis of the beliefs, practices and often unarticulated assumptions which underlie human–environmental relations. In discussing how cultural processes are central to environmental attitudes and behaviours, and how qualitative research methods can be used to understand them in …
Regioselective Synthesis Of Novel E-Edge-[60]Fullerenylmethanodihydropyrroles And 1,2-Dihydromethano[60]Fullerenes, Leila Chaker, Graham E. Ball, James R. Williams, Glenn A. Burley, Bill C. Hawkins, Paul A. Keller, Stephen G. Pyne
Regioselective Synthesis Of Novel E-Edge-[60]Fullerenylmethanodihydropyrroles And 1,2-Dihydromethano[60]Fullerenes, Leila Chaker, Graham E. Ball, James R. Williams, Glenn A. Burley, Bill C. Hawkins, Paul A. Keller, Stephen G. Pyne
Faculty of Science - Papers (Archive)
Treatment of a tethered N-(diphenylmethylene)glycinate-malonate derivative with [60]fullerene under Bingel conditions yielded an e-edge-[60]fullerenylmethanodihydropyrrole adduct in a regioselective manner. The regiochemical outcome was independent of the order of addition of either the N-(diphenylmethylene)glycinate or the malonate moieties. This new bis-adduct was also prepared in 13C enriched form allowing for its unequivocal structural characterization by 2D INADEQUATE NMR experiments. Ring-opening of the dihydropyrrole functionality of the bisadducts under reductive conditions gave exclusively novel dihydromethano[60]fullerene derivatives.
Evidence Of Reduced Measurement Uncertainties From An Ftir Instrument Intercomparison At Kiruna, Sweden, A. Meier, Clare Paton-Walsh, C. Bell, T. Blumenstock, F. Hase, A. Goldman, A. Steen, R. Kift, P. Woods, Y. Kondo
Evidence Of Reduced Measurement Uncertainties From An Ftir Instrument Intercomparison At Kiruna, Sweden, A. Meier, Clare Paton-Walsh, C. Bell, T. Blumenstock, F. Hase, A. Goldman, A. Steen, R. Kift, P. Woods, Y. Kondo
Faculty of Science - Papers (Archive)
We report the results of an intercomparison of vertical column amounts of HCl, HF, N2O, HNO3, CH4, O3, CO2 and N2 derived from the spectra recorded by two ground-based FTIR spectrometers operated side-by-side using the sun as a source. The procedures used to record spectra and derive vertical column amounts followed the format of previous instrument intercomparisons organised by the Network for Detection of Stratospheric Change (NDSC), but the level of agreement achieved was significantly better than for previous intercomparisons. For most gases the differences were typically 1% or less, with at least one of the five datasets showing no …
Adaptation To Extreme Environments: Macromolecular Dynamics In Complex Systems, M. Tehei
Adaptation To Extreme Environments: Macromolecular Dynamics In Complex Systems, M. Tehei
Faculty of Science - Papers (Archive)
What we previously thought of as insurmountable physical and chemical barriers to life, we now see as yet another niche harbouring Fextremophiles_. Extremophiles and their macromolecules had to develop molecular mechanisms of adaptation to extreme physico–chemical conditions. Using neutron spectroscopy, we have demonstrated that molecular dynamics represents one of these molecular mechanisms of adaptation. To which extent do hyper-saline conditions and extreme temperatures influence molecular dynamics? First, molecular dynamics were analysed for halophilic malate dehydrogenase from Haloarcula marismortui (Hm MalDH) under different molar solvent salt concentration conditions influencing its stability. Secondly, mean macromolecular motions were measured in-vivo in psychrophile (Aquaspirillum …
Is Plasminogen Deployed As A Streptococcus Pyogenes Virulence Factor?, Mark J. Walker, Jason D. Mcarthur, F. Mckay, M. Ranson
Is Plasminogen Deployed As A Streptococcus Pyogenes Virulence Factor?, Mark J. Walker, Jason D. Mcarthur, F. Mckay, M. Ranson
Faculty of Science - Papers (Archive)
Streptococcus pyogenes (group A streptococcus) causes human skin and throat infections as well as highly invasive diseases including necrotising fasciitis. Group A streptococcal infections and invasive disease have made a resurgence in developed countries over the last two decades. S. pyogenes utilise multiple pathways for the acquisition and activation of human plasminogen, securing potent proteolytic activity on the bacterial cell surface. Recent experimental evidence using a humanised transgenic mouse model suggests a critical role for human plasminogen in the dissemination of S. pyogenes in vivo.
Tandem Mass Spectrometry Of Deprotonated Iodothyronines, A. M. Couldwell, M. C. Thomas, Todd Mitchell, A. Hulbert, Stephen J. Blanksby
Tandem Mass Spectrometry Of Deprotonated Iodothyronines, A. M. Couldwell, M. C. Thomas, Todd Mitchell, A. Hulbert, Stephen J. Blanksby
Faculty of Science - Papers (Archive)
In order to assist with the development of more selective and sensitive methods for thyroid hormone analysis the [M-H]– anions of the iodothyronines; T4, T3, rT3, (3,5)-T2 and the non-iodinated thyronine (T0) have been generated by negative ion electrospray mass spectrometry. Tandem mass spectra of these ions were recorded on a triple quadrupole mass spectrometer and show a strong analogy with the fragmentation pathways of the parent compound, tyrosine. All iodothyronines also show significant abundances of the iodide anion in their tandem mass spectra, which represents an attractive target for MRM analysis, given that iodothyronines are the only iodine bearing …
A Comparison Of The Gas Phase Acidities Of Phospholipid Headgroups:Experimental And Computational Studies, M. C. Thomas, Todd Mitchell, Stephen J. Blanksby
A Comparison Of The Gas Phase Acidities Of Phospholipid Headgroups:Experimental And Computational Studies, M. C. Thomas, Todd Mitchell, Stephen J. Blanksby
Faculty of Science - Papers (Archive)
Proton-bound dimers consisting of two glycerophospholipids with different headgroups were prepared using negative ion electrospray ionization and dissociated in a triple quadrupole mass spectrometer. Analysis of the tandem mass spectra of the dimers using the kinetic method provides, for the first time, an order of acidity for the phospholipid classes in the gas phase of PE < PA << PG < PS < PI. Hybrid density functional calculations on model phospholipids were used to predict the absolute deprotonation enthalpies of the phospholipid classes from isodesmic proton transfer reactions with phosphoric acid. The computational data largely support the experimental acidity trend, with the exception of the relative acidity ranking of the two most acidic phospholipid species. Possible causes of the discrepancy between experiment and theory are discussed and the experimental trend is recommended. The sequence of gas phase acidities for the phospholipid headgroups is found to; (i) have little correlation with the relative ionization efficiencies of the phospholipid classes observed in the negative ion electrospray process, and (ii) correlate well with fragmentation trends observed upon collisional activation of phospholipid [M-H]– anions.
Impact Of Changes In Natural Uv Radiation On Pigment Composition, Physiological And Morphological Characteristics Of The Antarctic Moss, Grimmia Antarctici., Sharon A. Robinson, J. D. Turnbull, C. E. Lovelock
Impact Of Changes In Natural Uv Radiation On Pigment Composition, Physiological And Morphological Characteristics Of The Antarctic Moss, Grimmia Antarctici., Sharon A. Robinson, J. D. Turnbull, C. E. Lovelock
Faculty of Science - Papers (Archive)
The impact of ambient UV-B radiation on the endemic bryophyte, Grimmia antarctici, was studied over 14 months in East Antarctica. Over recent decades, Antarctic plants have been exposed to the largest relative increase in UV-B exposure as a result of ozone depletion. We investigated the effect of reduced UV and visible radiation on the pigment concentrations, surface reflectance and physiological and morphological parameters of this moss. Plexiglass screens were used to provide both reduced UV levels (77%) and a 50% decrease in total radiation. The screen combinations were used to separate UV photoprotective from visible photoprotective strategies, since these bryophytes …
R120g Αb-Crystallin Promotes The Unfolding Of Reduced Α-Lactalbumin And Is Inherently Unstable., T. M. Treweek, A. Rekas, R. A. Lindner, Mark J. Walker, J. A. Aquilina, C. V. Robinson, J. Horwitz, M. Der Perng, R. A. Quinlan, J. A. Carver
R120g Αb-Crystallin Promotes The Unfolding Of Reduced Α-Lactalbumin And Is Inherently Unstable., T. M. Treweek, A. Rekas, R. A. Lindner, Mark J. Walker, J. A. Aquilina, C. V. Robinson, J. Horwitz, M. Der Perng, R. A. Quinlan, J. A. Carver
Faculty of Science - Papers (Archive)
α-Crystallin is the principal lens protein which, in addition to its structural role, also acts as a molecular chaperone, to prevent aggregation and precipitation of other lens proteins. One of its two subunits, αB-crystallin, is also expressed in many non-lenticular tissues, and a natural missense mutation, R120G, has been associated with cataract and desminrelated myopathy, a disorder of skeletal muscles (Vicart et al., 1998, Nature Genet. 20:92-95). In the present study, real-time 1H NMR spectroscopy showed that the ability of R120G αB-crystallin to stabilize the partially folded, molten globule state of α- lactalbumin was significantly reduced in comparison with wild …
Environmental Effects Of Ozone Depletion And Its Interactions With Climate Change: Progress Report, 2004, A Andrady, P Aucamp, A Bais, C. Ballare, L Bjorn, J R. Bornman, M Caldwell, T Callaghan, A P. Cullen, D J. Erickson, F R. De Gruijl, D P. Hader, Mohammad Ilyas, G Kulandaivelu, H D. Kumar, J Longstreth, Richard L. Mckenzie, M Norval, H Redhwi, R C. Smith, Keith R. Solomon, B Sulzberger, Y Takizawa, Xiaoyan Tang, A H. Teramura, A Torikai, J C. Van Der Leun, Stephen R. Wilson, R C. Worrest, R. G. Zepp
Environmental Effects Of Ozone Depletion And Its Interactions With Climate Change: Progress Report, 2004, A Andrady, P Aucamp, A Bais, C. Ballare, L Bjorn, J R. Bornman, M Caldwell, T Callaghan, A P. Cullen, D J. Erickson, F R. De Gruijl, D P. Hader, Mohammad Ilyas, G Kulandaivelu, H D. Kumar, J Longstreth, Richard L. Mckenzie, M Norval, H Redhwi, R C. Smith, Keith R. Solomon, B Sulzberger, Y Takizawa, Xiaoyan Tang, A H. Teramura, A Torikai, J C. Van Der Leun, Stephen R. Wilson, R C. Worrest, R. G. Zepp
Faculty of Science - Papers (Archive)
The complexity of the linkages between ozone depletion, UV-B radiation and climate change has become more apparent.
Radiocarbon In Corals From The Cocos (Keeling) Islands And Implications For Indian Ocean Circulation, Q Hua, Colin D. Woodroffe, Scott Smithers, M Barbetti, David Fink
Radiocarbon In Corals From The Cocos (Keeling) Islands And Implications For Indian Ocean Circulation, Q Hua, Colin D. Woodroffe, Scott Smithers, M Barbetti, David Fink
Faculty of Science - Papers (Archive)
Annual bands of a Porites coral from the Cocos (Keeling) Islands, eastern Indian Ocean, were analysed by radiocarbon for 1955–1985 AD. A rapid oceanic response of the site to bomb 14C is found, with a maximum D14C value of 132% in 1975. This value is considerably higher than those for the northwestern Indian Ocean, suggesting that surface waters reaching Cocos are not derived from the Arabian Sea. Instead, D14C values for Cocos and those for Watamu (Kenya) agree well over most of the study interval, suggesting that the South Equatorial Current carries 14C-elevated water rather than 14C-depleted water westward across …
Macrochannels And Their Significance For Flood-Risk Minimisation, West Dapto, New South Wales, E. L. Roper, Ivars Reinfelds, Gerald C. Nanson
Macrochannels And Their Significance For Flood-Risk Minimisation, West Dapto, New South Wales, E. L. Roper, Ivars Reinfelds, Gerald C. Nanson
Faculty of Science - Papers (Archive)
A prominent characteristic of streams draining catchments in West Dapto, New South Wales, are well developed macrochannels that have formed within alluvial terraces in mid-catchment zones. A detailed hydraulic modelling study using HEC-RAS, HEC-GeoRAS and Arcview GIS indicates that these macrochannels are scaled to accommodate high magnitude floods. They offer a significant degree of natural protection from flood events up to and in excess of 100 years recurrence interval, essentially by operating as 'bankfull' channels during such events. Macrochannel landforms can be clearly distinguished and mapped on fine-scale digital elevation models (DEMs) and other GIS data sources such as rectified …
Palaeovolcanic Forcing Of Short-Term Dendroisotopic Depletion: The Effect Of Decreased Solar Intensity On Irish Oak, N. Ogle, Christian Turney, R.M. Kalin, L. O'Donnell, C.J. Butler
Palaeovolcanic Forcing Of Short-Term Dendroisotopic Depletion: The Effect Of Decreased Solar Intensity On Irish Oak, N. Ogle, Christian Turney, R.M. Kalin, L. O'Donnell, C.J. Butler
Faculty of Science - Papers (Archive)
The climatic effects of historical volcanic eruptions are well documented in the literature. What are less certain however, are the effects of eruptions on more distant environments, particularly vegetation. Here we present sub-annual δ13C records from two high-resolution Irish oak (Quercus spp.) chronologies that span the Laki (Grímsvötn) 1783–84 and Tambora 1815 eruptions. In both instances, a significant depletion in δ13C is recorded within the trees following the eruption (∼1.8‰). Historical meteorological datasets from observatories near to the trees sampled demonstrate that the shifts in carbon isotopic content cannot be accounted for by changes in …
Structural Re-Assignment Of The Mono- And Bis-Addition Products From The Addition Reactions Of N-(Diphenylmethylene)Glycinate Esters To [60]Fullerene Under Bingel Conditions, Graham E Ball, Glenn Ashley Burley, Leila Chaker, William Hawkins, James Williams, Paul A. Keller, Stephen G. Pyne
Structural Re-Assignment Of The Mono- And Bis-Addition Products From The Addition Reactions Of N-(Diphenylmethylene)Glycinate Esters To [60]Fullerene Under Bingel Conditions, Graham E Ball, Glenn Ashley Burley, Leila Chaker, William Hawkins, James Williams, Paul A. Keller, Stephen G. Pyne
Faculty of Science - Papers (Archive)
The addition of N-(diphenylmethylene)glycinate esters (Ph2C=NCH2CO2R) to [60]fullerene under Bingel conditions gives [60]fullerenyldihydropyrroles and not methano[60]fullerenyl iminoesters [C60C(CO2R)(N=CPh2)] as previously reported. Unequivocal evidence for the structure of C60C(CO2Et)(N=CPh2) was provided by INADEQUATE NMR studies on 13C enriched material. New mechanistic details are proposed to account for the formation of [60]fullerenyldihydropyrroles and their reductive ring-opening reactions.
Prodromus Of Vertebrate Paleontology And Geochronology Of Bermuda, Storrs L. Olson, David B. Wingate, Paul J. Hearty, Frederick V. Grady
Prodromus Of Vertebrate Paleontology And Geochronology Of Bermuda, Storrs L. Olson, David B. Wingate, Paul J. Hearty, Frederick V. Grady
Faculty of Science - Papers (Archive)
Summary Pleistocene sea-level fluctuations were the primary determinant of geological deposition and biotic evolution on Bermuda. The island is composed of carbonate sand deposited on the eroded summit of a submarine volcano during ele- vated sea-levels of interglacial periods. A few vertebrate remains have been recovered directly from interglacial sandstones, mainly of mid-Pleistocene age. Glacial intervals are marked by red soils derived mainly from atmospheric dust. Vertebrate fossils of glacial age are not preserved at the surface and are known only from caves and fissure fills. Fossil faunas are known on Bermuda from the last two glacial episodes but none …
No Academic Borders?: Transdisciplinarity In University Teaching And Research, Alice W. Russell
No Academic Borders?: Transdisciplinarity In University Teaching And Research, Alice W. Russell
Faculty of Science - Papers (Archive)
Transdisciplinarity has been a veritable mantra, especially in the humanities and social sciences, for twenty years or more. Yet academic structures and research application requirements still struggle to come to grips with crossboundary research and teaching. Making universities more trans-discipline-friendly is a tricky task, however. As Wendy Russell explains, trans-disciplines require disciplines, and disciplinary boundaries, too.
Effects Of Javan Rusa Deer (Cervus Timorensis) On Native Plant Species In The Jibbon-Bundeena Area, Royal National Park, New South Wales, David Keith, Belinda Pellow
Effects Of Javan Rusa Deer (Cervus Timorensis) On Native Plant Species In The Jibbon-Bundeena Area, Royal National Park, New South Wales, David Keith, Belinda Pellow
Faculty of Science - Papers (Archive)
A reconnaissance survey and exclosure experiment were carried out to examine the effects of Javan rusa deer on native flora and vegetation in Royal National Park on the southern outskirts of Sydney, Australia. Of 78 native plant species examined during the survey, only nine showed no evidence of vertebrate herbivory or physical damage and the majority of these plants were ferns and sedges. The other 69 species showed effects that included defoliation (young and/or old leaves), removal of shoots, bark-stripping, stem breakages and destruction or consumption of reproductive material. These effects varied in severity between species and from place to …
Combined Effects Of Solar Radiation And Desiccation On The Mortality And Development Of Encapsulated Embryos Of Rocky Shore Gastropods, R. Przeslawski
Combined Effects Of Solar Radiation And Desiccation On The Mortality And Development Of Encapsulated Embryos Of Rocky Shore Gastropods, R. Przeslawski
Faculty of Science - Papers (Archive)
Intertidal encapsulated embryos may be synchronously exposed to many environmental stressors, but interactions between some of these factors remain poorly understood. Here, the effects of solar radiation and desiccation on embryonic mortality and developmental rates were assessed using laboratory and field experiments. Egg masses of 3 intertidal gastropod species were exposed for 72 h to combinations of spectral (full spectrum, UV-blocked, dark) and daily emersion treatments (control, 15, 30, 60 min). Siphonaria denticulata and Bembicium nanum embryos were expected to be tolerant to emersion and UVR as they are routinely deposited on exposed rock platforms. In contrast, Dolabrifera brazieri embryos …
Confirmation Of The Structure Of Oxystemokerrin By Single Crystal X-Ray Structural Analysis And A Proposed Biosynthesis, Pitchaya Mungkornasawakul, Hayden Matthews, Alison T. Ung, Stephen G. Pyne, Araya Jatisatienr, Wilford Lie, Brian W. Skelton, Allan H. White
Confirmation Of The Structure Of Oxystemokerrin By Single Crystal X-Ray Structural Analysis And A Proposed Biosynthesis, Pitchaya Mungkornasawakul, Hayden Matthews, Alison T. Ung, Stephen G. Pyne, Araya Jatisatienr, Wilford Lie, Brian W. Skelton, Allan H. White
Faculty of Science - Papers (Archive)
The crystal structure of the pentacyclic Stemona alkaloid oxystemokerrin (2), isolated from the roots of Stemona kerrii, is reported, confirming the structure proposed for this compound in a contemporaneous spectroscopic study. This compound is a diastereomer of stemocurtisinol (3), whose structure we have recently reported from S. curtisii, also confirmed by a single-crystal X-ray study. These alkaloids have opposite configurations at C-4 and C-19. A possible biosynthetic pathway for the biosynthesis of 2 and 3 is proposed.
Mechanisms Of Climate Variability, Edward A. Bryant
Mechanisms Of Climate Variability, Edward A. Bryant
Faculty of Science - Papers (Archive)
Climatic hazards originate with the processes that move air across the Earth's surface due to differential heating and cooling. Surprisingly, examination of these processes has focused upon heating at the tropics and downplayed the role of cold air masses moving out of polar regions due to deficits in the radiation balance in these latter regions. Fluctuations – in the intensity of pulses of cold air moving out of polar regions or of heating at the equator – and the location of the interaction between these cold and warm air masses, are crucial factors in determining the magnitude, frequency, and location …
Doing Discourse Analysis, Gordon R. Waitt
Doing Discourse Analysis, Gordon R. Waitt
Faculty of Science - Papers (Archive)
My hope in writing this chapter is to generate enthusiasm for geographical research employing discourse analysis. My intention is to provide some advice on doing discourse analysis to facilitale the design of research. I first outline why some geographers have been inspired by this approach. I suggest how Foucauldian discourse analysis is a break from other critical methods applied to textual analysis, including content analysis, semiology, and iconography. The theoretical underpinnings of the method provided by Michel Foucault, a French poststructuralist philosopher, is a key source of difference. I therefore condense Michel Foucault's contribution to discourse analysis by sketching out …
Catalytic Transesterification Of Beta-Ketoesters With Zeolite H-Fer Under Solvent Free Conditions, Sudhir R. Shengule, K Pasupathy, Subhash P. Chavan, Vikas Shinde, R Anand
Catalytic Transesterification Of Beta-Ketoesters With Zeolite H-Fer Under Solvent Free Conditions, Sudhir R. Shengule, K Pasupathy, Subhash P. Chavan, Vikas Shinde, R Anand
Faculty of Science - Papers (Archive)
Zeolite H-FER catalyzes the transesterification of ??-ketoesters with variety of alcohols under solvent-less condition in excellent yields. The catalyst can be reused without any loss of activity. ?? ARKAT.
Phytochemical Studies On Stemona Plants: Isolation Of Stemofoline Alkaloids, Thanapat Sastraruji, Araya Jatisatienr, Stephen G. Pyne, Alison T. Ung, Wilford Lie, Morwenna C. Williams
Phytochemical Studies On Stemona Plants: Isolation Of Stemofoline Alkaloids, Thanapat Sastraruji, Araya Jatisatienr, Stephen G. Pyne, Alison T. Ung, Wilford Lie, Morwenna C. Williams
Faculty of Science - Papers (Archive)
Six new stemofoline alkaloids, (2‘R)-hydroxystemofoline (5), (3‘R)-stemofolenol (6), (3‘S)-stemofolenol (7), 1‘,2‘-didehydrostemofoline-N-oxide (8), the first C19 stemofoline alkaloid, methylstemofoline (9), and the first glycosidated Stemona alkaloid, stemofolinoside (10), and three known alkaloids, (2‘S)-hydroxystemofoline (2), (11Z)-1‘,2‘-didehydrostemofoline (3), and (11E)-1‘,2‘-didehydrostemofoline (4), have been isolated from a root extract of an unidentified Stemona species. The structure and relative configuration of these new alkaloids have been determined by spectral data interpretation and …
The History Of Aridity In Australia: Chronological Developments, Ed Rhodes, John Chappell, Toshiyuki Fujioka, Kat Fitzsimmons, John Magee, Max Aubert, Dolan Hewitt
The History Of Aridity In Australia: Chronological Developments, Ed Rhodes, John Chappell, Toshiyuki Fujioka, Kat Fitzsimmons, John Magee, Max Aubert, Dolan Hewitt
Faculty of Science - Papers (Archive)
Desert dune-fields are quintessential features of arid landscapes. During arid phases in the recent geological past, such as the global last glacial maximum (LGM) at around 20,000 years ago, many parts of Australia experienced significant sand movement, with sand migrating down-wind and forming linear dunes. Sand entrainment and deposition is controlled by vegetative surface stabilisation, wind speed and direction, which in turn are controlled by regional climate and local factors including ground-water levels. Climate also affects sand supply, through its effects on erosion in the source areas and transport to the dune-building areas.
'Murphy, Do You Want To Delete This?' Hidden Histories And Hidden Landscapes In The Murchison And Davenport Ranges, Northern Territory, Australia., N. J. Gill, A. Paterson, M. Kennedy
'Murphy, Do You Want To Delete This?' Hidden Histories And Hidden Landscapes In The Murchison And Davenport Ranges, Northern Territory, Australia., N. J. Gill, A. Paterson, M. Kennedy
Faculty of Science - Papers (Archive)
[Extract] During Easter in 2000 we (AP and NG) were in Central Australia during heavy rainfalls and flooding. Roads were cut and we were stuck in Tennant Creek. We decided to review documents held by the local museum. This included material used in the late 1970s to compile a general history of Tennant Creek, the only such work of which we are aware. It was interesting to note that in one case the author had written to a pastoralist they had recently visited, and included a section describing the role of Aboriginal people at their station. In brackets after this …
Beyond Yellowstone? Conservation And Indigenous Rights In Australia And Sweden, Michael Adams
Beyond Yellowstone? Conservation And Indigenous Rights In Australia And Sweden, Michael Adams
Faculty of Science - Papers (Archive)
Faced with the paradox of a large global increase in conservation reserves and a simultaneous global decrease in actual effective protection for biodiversity, conservation scientists and others are questioning established conservation theory and practice. Conservation is largely a ‘residual’ landuse, which often conflicts with another residual landuse, the remaining lands owned or accessed by Indigenous peoples. I argue that the Western conservation model has created this situation, and that engaging with Indigenous ways of relating to ‘nature’ could lead to improved outcomes. From the basis that environmental problems are fundamentally social problems, and using case studies from Australia and Sweden, …
Mobile Polar Highs Over Australia : Origins And Effect On Rainfall, C. Hargraves, Edward A. Bryant
Mobile Polar Highs Over Australia : Origins And Effect On Rainfall, C. Hargraves, Edward A. Bryant
Faculty of Science - Papers (Archive)
Mobile Polar Highs (MPHs) are masses of cold air that move out aperiodically from the Antarctic Icecap and eventually cross Australia. Their movement from the Weddell Sea and the Lambert Glacier was monitored between 26 March and 20 July 2004 using daily satellite images and synoptic charts. Their leading edge appears on these images as a distinct arced cloudband. The patterns of MPHs were then linked to significant rainfall events—>50 mm in 24 hrs—in southeastern Australia. Although most of this area of Australia was in drought over the study period, three major rainfall events resulted from the passage of …
Planning For Natural Hazards — How Can We Mitigate The Impacts?, Edward A. Bryant, Lesley M. Head, J. Morrison
Planning For Natural Hazards — How Can We Mitigate The Impacts?, Edward A. Bryant, Lesley M. Head, J. Morrison
Faculty of Science - Papers (Archive)
Australia has the same frequency of natural hazards as any other continent; however, the types and impact of hazards are very different. Globally, the deadliest hazards are floods, earthquakes, tropical storms and tsunami. In Australia, the deadliest hazards are heat waves, floods, tropical cyclones and bushfires. Similarly, while the most expensive hazards ranked globally are also floods, earthquakes and tropical cyclones, in Australia, the costliest hazards are tropical storms, floods, wind and bushfires. Our isolated population distribution, together with rugged topography along the eastern and southern coastal fringe where the bulk of the population is concentrated, has lead to a …