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2006

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Articles 331 - 360 of 375

Full-Text Articles in Physical Sciences and Mathematics

First Detection Of Meso-Thermospheric Nitric Oxide (No) By Ground-Based Ftir Solar Absorption Spectroscopy, Aldona Wiacek, Nicholas B. Jones, K Strong, J R. Taylor, Richard L. Mittermeier, Hans Fast Jan 2006

First Detection Of Meso-Thermospheric Nitric Oxide (No) By Ground-Based Ftir Solar Absorption Spectroscopy, Aldona Wiacek, Nicholas B. Jones, K Strong, J R. Taylor, Richard L. Mittermeier, Hans Fast

Faculty of Science - Papers (Archive)

We report the first detection of mesospheric-lower thermospheric (MLT, 50–130 km) NO from ground-based FTIR solar absorption spectra using Lorentz- and Doppler-broadened solar absorption lines in the stratosphere and in the MLT, respectively. We present the first characterization of vertical sensitivity in the FTIR NO retrieval and show that MLT NO partial columns can be retrieved with ~1 independent piece of information using a climatological NO profile extending up to 130 km. The information content analysis also improves the characterization of stratospheric partial column retrievals and is relevant to NO results obtained at other Network for the Detection of Stratospheric …

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Novel Polycyclic Diels-Alder Adducts From Ring Distorted 3-Aza[5] And 3-Aza[6] (1,7) Napthalenophanes, John B. Bremner, Wasna Jaturonusmee Jan 2006

Novel Polycyclic Diels-Alder Adducts From Ring Distorted 3-Aza[5] And 3-Aza[6] (1,7) Napthalenophanes, John B. Bremner, Wasna Jaturonusmee

Faculty of Science - Papers (Archive)

Ring distorted 3-aza[5] and 3-aza[6](1,7)naphthalenophanes have been shown to undergo ready Diels-Alder cycloaddition reactions with 4-phenyl-1,2,4-triazoline-3,5-dione, tetracyanoethylene, 1,1-dicyanoethylene and 1,1-diethyl methylenemalonate to form new functionalized polycyclic heterocyclic derivatives. Addition was shown to occur selectively in each case in the less substituted aromatic ring of the naphthalene moiety.

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Gay And Lesbian Identity Work At Home, Andrew W. Gorman-Murray Jan 2006

Gay And Lesbian Identity Work At Home, Andrew W. Gorman-Murray

Faculty of Science - Papers (Archive)

Geographical and sociological literature on gay/lesbian experiences of domestic environments has drawn attention to the heteronormativity of homes, focusing on how these sites often marginalise and silence gay/lesbian identities. While not denying these arguments, I suggest that many gay men and lesbians have also used domestic spaces to resist heteronormative socialisation and affirm gay/lesbian identities. In this paper I explore some of these affirmative uses. Drawing on 37 in-depth interviews with gay/lesbian Australians, I examine two key ways that some gay men and lesbians have used homes to consolidate their sexual identities: (i) the role played by domestic spaces in …

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Imagining King Street In The Gay/Lesbian Media, Andrew W. Gorman-Murray Jan 2006

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: …

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Antiquity Of The Oceans And Continents, Allen Phillip Nutman Jan 2006

Antiquity Of The Oceans And Continents, Allen Phillip Nutman

Faculty of Science - Papers (Archive)

Tracing the origin of the oceans and the division of the crust into distinct oceanic and continental realms relies on incomplete information from tiny vestiges of surviving oldest crust (>3.6 billions years old). Billions of years of tectonism, melting and erosion have obliterated the rest of that crust. Oceans and continental crust already existed almost four billion years ago because water-laid sedimentary rocks of this age have been found and because tonalites dominate in gneissic sequences dating from this period. Tonalites are igneous rocks produced by partial melting of hydrated basaltic crust at convergent plate boundaries. Collisional orogenic systems …

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Comment On ‘‘Zircon Thermometer Reveals Minimum Melting Conditions On Earliest Earth’’ Ii, Allen Phillip Nutman Jan 2006

Comment On ‘‘Zircon Thermometer Reveals Minimum Melting Conditions On Earliest Earth’’ Ii, Allen Phillip Nutman

Faculty of Science - Papers (Archive)

No abstract provided.

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An Epididymal Form Of Cauxin, A Carboxylesterase-Like Enzyme, Is Present And Active In Mammalian Male Reproductive Fluids, Heath W. Ecroyd, Maya Belghazi, Jl Dacheux, M Miyazaki, T Yamashita, Jl Gatti Jan 2006

An Epididymal Form Of Cauxin, A Carboxylesterase-Like Enzyme, Is Present And Active In Mammalian Male Reproductive Fluids, Heath W. Ecroyd, Maya Belghazi, Jl Dacheux, M Miyazaki, T Yamashita, Jl Gatti

Faculty of Science - Papers (Archive)

Mass spectrometric analysis of a prion protein (PrP)-containing complex isolated from ram cauda epididymal fluid revealed a protein that showed homology to a carboxylesterase-like protein previously identified in cat urine (cauxin). Using anticauxin antibodies, immunoreactive bands were detected in corpus and cauda epididymal fluid from all mammals tested (ram, boar, mouse, and cat). In the ram, the protein was also present in seminal fluid but not found to be associated with sperm. The bands reacting with the anti-cauxin antibody coincided with those having esterase activity in a zymographic assay and its levels paralleled the esterase activity of native epididymal fluids. …

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The Carboeurope Regional Experiment Strategy, A J Dolman, J Noilhan, P Durand, C Sarrat, A Brut, B Piguet, A Butet, N Jarosz, Y Brunet, D Loustau, E Lamaud, L Tolk, R Ronda, F Miglietta, B Gioli, V Magliulo, M Esposito, C Gerbig, S Korner, O Glademard, M Ramonet, P Ciais, B Neininger, R W A Hutjes, J A Elbers, Ronald Macatangay, O Schrems, G Perez-Landa, M J Sanz, Y Scholz, G Facon, E Ceschia, P Beziat Jan 2006

The Carboeurope Regional Experiment Strategy, A J Dolman, J Noilhan, P Durand, C Sarrat, A Brut, B Piguet, A Butet, N Jarosz, Y Brunet, D Loustau, E Lamaud, L Tolk, R Ronda, F Miglietta, B Gioli, V Magliulo, M Esposito, C Gerbig, S Korner, O Glademard, M Ramonet, P Ciais, B Neininger, R W A Hutjes, J A Elbers, Ronald Macatangay, O Schrems, G Perez-Landa, M J Sanz, Y Scholz, G Facon, E Ceschia, P Beziat

Faculty of Science - Papers (Archive)

No abstract provided.

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Endogenous Nitrogen Excretion By Red Kangaroos (Macropus Rufus): Effects Of Animal Age And Forage Quality, Adam J. Munn, Terence J. Dawson, Ian D. Hume Jan 2006

Endogenous Nitrogen Excretion By Red Kangaroos (Macropus Rufus): Effects Of Animal Age And Forage Quality, Adam J. Munn, Terence J. Dawson, Ian D. Hume

Faculty of Science - Papers (Archive)

Red kangaroos (Macropus rufus) are large (>20 kg) herbivorous marsupials common to arid and semiarid Australia. The population dynamics of red kangaroos are linked with environmental factors, operating largely through juvenile survival. A crucial period is the young-at-foot (YAF) stage, when juveniles have permanently left the mother's pouch but still take milk from a teat in the pouch. Forage quantity and quality have been implicated in drought-related mortalities of juvenile kangaroos. Here we compared how forage quality affected nitrogen (N) intake and excretion by YAF, weaned, and mature, non-lactating female red kangaroos. On high-quality forage ( chopped lucerne hay, …

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Digestive Plasticity Of The Small Intestine And The Fermentative Hindgut In A Marsupial Herbivore, The Tammar Wallaby (Macropus Eugenii), Adam J. Munn, Peter Banks, Ian D. Hume Jan 2006

Digestive Plasticity Of The Small Intestine And The Fermentative Hindgut In A Marsupial Herbivore, The Tammar Wallaby (Macropus Eugenii), Adam J. Munn, Peter Banks, Ian D. Hume

Faculty of Science - Papers (Archive)

We investigated the effects of a ground, pelleted diet versus natural forage on the gross morphology of the gastrointestinal tract of a medium- sized (5 - 7 kg body mass) macropodid marsupial, the tammar wallaby ( Macropus eugenii). The empty wet mass ( g) of the small intestine of tammar wallabies maintained on a pelleted diet for 6 weeks was 22% greater than that of animals maintained on natural forage, once body mass was taken into account by ANCOVA. Similarly, the body-mass-adjusted length of the tammar wallaby caecum and proximal colon combined was 25% longer in animals maintained on the …

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Experimental Manipulation Of Shade, Silt, Nutrients And Salinity On The Temperate Reef Sponge Cymbastela Concentrica, D. E. Roberts, A. R. Davis, S. P. Cummins Jan 2006

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 …

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Current Applications Of Hyperspectral Remote Sensing In The Discrimination Of Australian Eucalypt Species, Laurie A. Chisholm, B Datt Jan 2006

Current Applications Of Hyperspectral Remote Sensing In The Discrimination Of Australian Eucalypt Species, Laurie A. Chisholm, B Datt

Faculty of Science - Papers (Archive)

hyperspectral remote sensing provides detail on biophysical variables related to forest ecosystem processes useful for tracking and predicting structure and function of vegetation considerable potential of laboratory spectrometry and near-range work in the field to derive stress indicators and changes in cholorphyll content has been demonstrated that includes a range of studies conducted on unique Australian vegetation types.

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Application Of Surrogate Methods For Assessing The Bioavailability Of Pahs In Sediments To A Sediment Ingesting Bivalve, Stuart L. Simpson, Victoria L. Burston, Dianne F. Jolley, Kim Chau Jan 2006

Application Of Surrogate Methods For Assessing The Bioavailability Of Pahs In Sediments To A Sediment Ingesting Bivalve, Stuart L. Simpson, Victoria L. Burston, Dianne F. Jolley, Kim Chau

Faculty of Science - Papers (Archive)

The usefulness of two surrogate methods for rapidly determining the bioavailability of PAHs in hydrocarbon-contaminated marine sediments was assessed. Comparisons are made between the PAHs accumulated by the benthic bivalve, Tellina deltoidalis, and the extractable-PAHs determined using a 6-h XAD-2 resin desorption method and a 4-h gut fluid mimic (GFM) extraction method. There were significant positive relationships between PAH bioaccumulation by the bivalves and sediment PAH concentrations. These relationships were not improved by normalising the sediment PAH concentrations to the organic carbon concentration. The average percentage lipid content of the bivalves was 1.47 ± 0.22% and BSAFs for total-PAHs ranged …

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Landscape Variability And The Response Of Asian Megadeltas To Environmental Change, Colin D. Woodroffe, Robert J. Nicholls, Yoshiki Saito, Zhongyuan Chen, S L. Goodbred Jan 2006

Landscape Variability And The Response Of Asian Megadeltas To Environmental Change, Colin D. Woodroffe, Robert J. Nicholls, Yoshiki Saito, Zhongyuan Chen, S L. Goodbred

Faculty of Science - Papers (Archive)

Deltas, occurring at the mouths of river systems that deposit sediments as they enter the sea, are some of the most dynamic sedimentary environments. They contain a long, and often economically significant, sedimentary record of their response to past episodes of climate and sea-level change. Geological investigation of these deposits, and the processes controlling sedimentation, provide insights into the response of deltas to environmental change, which in turn may offer rational and cost-effective strategies for the sustainable management of natural resources and land use in these dynamic systems in the face of future environmental change.

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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 Jan 2006

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 …

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Recruitment Failure And Shifts In Community Structure Following Mass Mortality Limit Recovery Prospects Of Black Abalone, C. Melissa Miner, Jessica M. Altstatt, Peter T. Raimondi, Todd E. Minchinton Jan 2006

Recruitment Failure And Shifts In Community Structure Following Mass Mortality Limit Recovery Prospects Of Black Abalone, C. Melissa Miner, Jessica M. Altstatt, Peter T. Raimondi, Todd E. Minchinton

Faculty of Science - Papers (Archive)

Mass mortalities of species can fundamentally alter the structure of natural communities, which can in turn negatively impact species’ recovery. Beginning in 1994, some of the largest remaining populations of black abaloneHaliotis cracherodii on the mainland coast of California, experienced mass mortalities due to the fatal disease called ‘withering syndrome’, which led to its listing as a species of concern by the USA National Marine Fisheries Service. We have been monitoring black abalone populations along the coast of southern and central California since 1992, and detection of withering syndrome at our southernmost site prompted us to investigate how the …

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New Applications Of Modulated Digital Images In Document Security, Robert A. Lee, Patrick W. Leech, Lawrey D. Mccarthy, Gerhard F. Swiegers Jan 2006

New Applications Of Modulated Digital Images In Document Security, Robert A. Lee, Patrick W. Leech, Lawrey D. Mccarthy, Gerhard F. Swiegers

Faculty of Science - Papers (Archive)

In previous work we have demonstrated that selective masking, or modulation, of digital images can be used to create documents and transparent media containing covert or optically variable, overt images. In the present work we describe new applications and techniques of such "modulated digital images" (MDI's) in document security. In particular, we demonstrate that multiple hidden images can be imperceptibly concealed within visible, host images by incorporating them as a new, half-tone, printing screen. Half-toned hidden images of this type may contain a variety of novel features that hinder unauthorized copying, including concealed multiple images, and microprinted-, color-, and various …

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Helicase-Binding To Dnai Exposes A Cryptic Dna-Binding Site During Helicase Loading In Bacillus Subtilis, Charikleia Ioannou, Patrick M. Schaeffer, Nicholas E. Dixon, Panos Soultanas Jan 2006

Helicase-Binding To Dnai Exposes A Cryptic Dna-Binding Site During Helicase Loading In Bacillus Subtilis, Charikleia Ioannou, Patrick M. Schaeffer, Nicholas E. Dixon, Panos Soultanas

Faculty of Science - Papers (Archive)

The Bacillus subtilis DnaI, DnaB and DnaD proteins load the replicative ring helicase DnaC onto DNA during priming of DNA replication. Here we show that DnaI consists of a C-terminal domain (Cd) with ATPase and DNA-binding activities and an N-terminal domain (Nd) that interacts with the replicative ring helicase. A Zn21-binding module mediates the interaction with the helicase and C67, C70 and H84 are involved in the coordination of the Zn21. DnaI binds ATP and exhibits ATPase activity that is not stimulated by ssDNA, because the DNAbinding site on Cd is masked by Nd. The ATPase activity resides on the …

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Observations Of A Propagating Vortex In A Tidal Current, J B. Hinwood, E. J. Mclean, O. Gould Jan 2006

Observations Of A Propagating Vortex In A Tidal Current, J B. Hinwood, E. J. Mclean, O. Gould

Faculty of Science - Papers (Archive)

While observing the hydrodynamics and geomorphology of the entrance to Burrill Lake, a small estuary on the south coast of New South Wales, Australia, a striking vortex phenomenon was observed. This vortex is described and interpreted.

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Structure And Dynamics Of Sponge-Dominated Assemblages On Exposed And Sheltered Temperate Reefs, D. E. Roberts, S. P. Cummins, A. R. Davis, M. G. Chapman Jan 2006

Structure And Dynamics Of Sponge-Dominated Assemblages On Exposed And Sheltered Temperate Reefs, D. E. Roberts, S. P. Cummins, A. R. Davis, M. G. Chapman

Faculty of Science - Papers (Archive)

There have been few studies on the structure and dynamics of sponge-dominated assemblages, despite the fact that such assemblages are vulnerable to environmental impacts from many anthropogenic disturbances. Sponges are generally slow to recruit, slow growing and long lived; hence, they may be very vulnerable to anthropogenic and natural disturbances. In order to understand how such assemblages may respond to disturbance, it is essential to measure natural patterns of spatial differences and temporal changes, so that any future impact assessments can be identified. This study quantified and contrasted patterns of abundance in sponge-dominated assemblages on deep reefs (18 to 20 …

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The Geomorphological Evolution Of A Wave-Dominated Barrier Estuary: Burrill Lake, New South Wales, Australia, Brian G. Jones, Craig R. Sloss, David M. Price, C.E. Mcclennen, John De Carli Jan 2006

The Geomorphological Evolution Of A Wave-Dominated Barrier Estuary: Burrill Lake, New South Wales, Australia, Brian G. Jones, Craig R. Sloss, David M. Price, C.E. Mcclennen, John De Carli

Faculty of Science - Papers (Archive)

The geomorphological evolution of the Holocene wave-dominated barrier estuary at Burrill Lake on the New South Wales coast, Australia, has been delineated using a combination of seismic stratigraphy and the lithostratigraphic analysis of vibracores collected from the back-barrier estuarine environment. A combination of radiocarbon and aspartic acid racemisation-derived ages obtained on Holocene fossil molluscs, and the thermoluminescent signal in remnant Last Interglacial barrier sediments provides the chronological framework for this investigation. Results from this paper show that the barrier estuary occupies a relatively narrow (<1.5 km wide) and shallow (<40 m deep) incised bedrock valley formed during sea-level lowstands. Late Pleistocene sedimentary successions and remnants of the Last Interglacial barrier have been preserved within the incised valley axis and the mouth of the incised valley. These sediments, deposited during the Last Interglacial sea-level highstand, have subsequently been partially removed during the last glacial maximum. Overlying the antecedent late Pleistocene landsurface is a near basin-wide basal marine sand deposited in response to rising sea level associated with the most recent post-glacial marine transgression, which inundated the shallow incised valley ca.7800 years ago. More open marine conditions, with a diverse assemblage of estuarine and marine mollusc species, persisted until ca. 4500 years ago when the stabilizing Holocene barrier resulted in the development of a lowenergy back-barrier lagoonal environment. A late Holocene 1-2 m regression of sea level ca. 3000 years ago further restricted oceanic circulation, increased the rate of fluvial bay-head delta progradation and the extension of the backbarrier central basin mud facies. This evolutionary model of barrier estuary evolution developed for Burrill Lake is consistent with recent research conducted in Lake Illawarra and St Georges Basin and can be applied to other estuaries that have formed in relatively shallow and narrow incised bedrock valleys on tectonically stable, wave-dominated coastlines.

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Carbon Nanotubes: Enhancing The Polymer Building Blocks For Intelligent Materials, Marc In Het Panhuis Jan 2006

Carbon Nanotubes: Enhancing The Polymer Building Blocks For Intelligent Materials, Marc In Het Panhuis

Faculty of Science - Papers (Archive)

Electroactive polymers can be engineered at the molecular level to recognise external stimuli, they are conductive and they are capable of localised processing. These are properties which make them ideal building blocks for intelligent materials. This article investigates the suitability of carbon nanotubes of enhancing (polymer) building blocks for intelligent materials.

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Random Mating In The Brooding Coral Acropora Palifera, Karen Miller, David J. Ayre Jan 2006

Random Mating In The Brooding Coral Acropora Palifera, Karen Miller, David J. Ayre

Faculty of Science - Papers (Archive)

For marine invertebrates such as corals, restricted dispersal of sperm and/or larvae have been invoked to explain large heterozygote deficits and population subdivision apparent in many genetic surveys. Equally though, for the many corals and other invertebrates that are hermaphroditic, inbreeding through self-fertilisation may also account for heterozygote deficits. Flexibility of mating systems to allow at least some level of self-fertilisation may be favoured by selection, as this would facilitate the founding of new populations by low numbers or densities of colonists. While tests for self-compatibility are relatively easy for broadcast-spawning corals, experimentally determining the level of selfing in corals …

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Sydney's Creative Economy: Social And Spatial Challenges, Christopher R. Gibson Jan 2006

Sydney's Creative Economy: Social And Spatial Challenges, Christopher R. Gibson

Faculty of Science - Papers (Archive)

The recent popularity of Richard Florida's work on the rise of the 'creative class' invites attention not only on the size and impact of the creative economy in Australia, but on its geography as well." At the core of Florida's approach is the premise that places compete with each other for a new kind of economic development, fuelled not by the availability of raw materials, cheap labour, or state investment in infrastructure, but by the decisions of producers in creative industries such as film, music, design and advertising to live and work in particular localities. Such creative producers constitute a …

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Tandem Mass Spectrometry Reveals The Quaternary Organization Of Macromolecular Assemblies, J L Benesch, Andrew Aquilina, Brandon T. Ruotolo, Frank Sobott, C V Robinson Jan 2006

Tandem Mass Spectrometry Reveals The Quaternary Organization Of Macromolecular Assemblies, J L Benesch, Andrew Aquilina, Brandon T. Ruotolo, Frank Sobott, C V Robinson

Faculty of Science - Papers (Archive)

The application of mass spectrometry (MS) to the study of progressively larger and more complex macromolecular assemblies is proving increasingly useful for structural biologists. The scope of this approach has recently been widened through the application of a tandem MS procedure. This two-step technique involves the selection of specific assemblies in the gas phase, and inducing their dissociation through collisions with argon atoms. Here we investigate the mechanism of this process and show that dissociation of subunits from a macromolecular assembly follows a sequential pathway, with the partitioning of charge between the dissociation products governed primarily by their relative surface …

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Microcosm: A Lost Cost 3-D Wireless Sensor Test-Bed Within A Controllable Environment, David Marsh, Richard Tynan, Stephen T. Beirne, Roderick L. Shepherd, Gregory O'Hare, Dermot Diamond, Brian Corcoran Jan 2006

Microcosm: A Lost Cost 3-D Wireless Sensor Test-Bed Within A Controllable Environment, David Marsh, Richard Tynan, Stephen T. Beirne, Roderick L. Shepherd, Gregory O'Hare, Dermot Diamond, Brian Corcoran

Faculty of Science - Papers (Archive)

This paper describes the creation of Microcosm, a low cost wireless sensor network test-bed within a controlled environment to facilitate WSN experiments in three dimensions, with an emphasis on executing sensing-related experiments. The design of the sensing hardware, software, support tools and the experimental environment itself are given. Issues related to the design of this configuration are discussed, with the potential pitfalls and eventual solutions alike given. Finally, current and future uses for the test-bed are listed.

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Demographic Feedback Between Clonal Growth And Fragmentation In An Invasive Seaweed, Jeffrey T. Wright, Andrew R. Davis Jan 2006

Demographic Feedback Between Clonal Growth And Fragmentation In An Invasive Seaweed, Jeffrey T. Wright, Andrew R. Davis

Faculty of Science - Papers (Archive)

Many abundant plants, invertebrates, and seaweed are clonal, and this allows the formation of high-density aggregations, foraging, and the placement of modules into new space, and rapid rates of expansion. For these species, population density and rates of expansion are functions of recruitment of asexual modules and post-recruitment vegetative growth and survivorship. In this study, we provide the first experimental test of the relative importance of these two processes in determining the abundance of a clonal seaweed using Caulerpa taxifolia, an invasive green alga that spreads rapidly and reaches very high abundance. We asked two main questions: What is …

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Polyamide Platinum Anti-Cancer Complexes Designed To Target Specific Dna Sequences, David Jaramillo, Nial J. Wheate, Stephen F. Ralph, Warren A. Howard, Yitzhak Tor, Janice Aldrich-Wright Jan 2006

Polyamide Platinum Anti-Cancer Complexes Designed To Target Specific Dna Sequences, David Jaramillo, Nial J. Wheate, Stephen F. Ralph, Warren A. Howard, Yitzhak Tor, Janice Aldrich-Wright

Faculty of Science - Papers (Archive)

Two new platinum complexes, trans-chlorodiammine[N-(2-aminoethyl)-4-[4-(N-methylimidazole-2-carboxamido)-N-methylpyrrole-2-carboxamido]-N-methylpyrrole-2-carboxamide]platinum(II) chloride (DJ1953-2) and trans-chlorodiammine[N-(6-aminohexyl)-4-[4-(N-methylimidazole-2-carboxamido)-N-methylpyrrole-2-carboxamido]-N-methylpyrrole-2-carboxamide]platinum(II) chloride (DJ1953-6) have been synthesized as proof-of-concept molecules in the design of agents that can specifically target genes in DNA. Coordinate covalent binding to DNA was demonstrated with electrospray ionization mass spectrometry. Using circular dichroism, these complexes were found to show greater DNA binding affinity to the target sequence:  d(CATTGTCAGAC)2, than toward either d(GTCTGTCAATG)2, which contains different flanking sequences, or d(CATTGAGAGAC)2, which contains a double base pair mismatch sequence. DJ1953-2 unwinds the DNA helix by around 13°, but neither metal complex significantly affects the DNA melting temperature. Unlike simple DNA minor …

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Annotated Possum And Glider Records From The Queensland Naturalist, Kevin Maloney, Jamie Harris Jan 2006

Annotated Possum And Glider Records From The Queensland Naturalist, Kevin Maloney, Jamie Harris

Faculty of Science - Papers (Archive)

Valuable observations on the occurrence of species are often recorded and published by naturalists. -The Queensland Naturalist is an important source of historic records on the distribution of many species. In this report, we survey past volumes of this journal records of possum and glider species, and also provide the latest sources of information on the distribution of possums and gliders in Queensland (Qld).

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Development Of A Submerged Membrane Fungi Reactor For Textile Wastewater Treatment, Faisal I. Hai, Kazuo Yamamoto, Kensuke Fukushi Jan 2006

Development Of A Submerged Membrane Fungi Reactor For Textile Wastewater Treatment, Faisal I. Hai, Kazuo Yamamoto, Kensuke Fukushi

Faculty of Science - Papers (Archive)

A submerged microfiltration membrane bioreactor implementing the white-rot fungus Coriolus versicolor was developed for the treatment of textile dye wastewater following explorations with different fouling-prevention techniques. The optimum combination ensuring permeate quality and precluding membrane fouling comprises of placing a bundle of hollow fibers within a non-woven coarse-pore (50–200 μm) mesh cage, so as to avoid direct deposition of sludge onto it, together with arrangements for its periodic high-pressure back-washing (3 s/10 min) and chemical back-flushing (100 ml/m2, every third day). Under controlled temperature (29±1°C) and pH (4.5±0.2), and applied HRT and an average flux of 15 h and 0.021 …

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