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Articles 2251 - 2280 of 4868

Full-Text Articles in Physical Sciences and Mathematics

A Mass Spectrometric Investigation Of Novel Quadruplex Dna-Selective Berberine Derivatives, Karina Gornall, Siritron Samosorn, Bongkot Tanwirat, Apichart Suksamrarn, John B. Bremner, Michael J. Kelso, Jennifer L. Beck Jan 2010

A Mass Spectrometric Investigation Of Novel Quadruplex Dna-Selective Berberine Derivatives, Karina Gornall, Siritron Samosorn, Bongkot Tanwirat, Apichart Suksamrarn, John B. Bremner, Michael J. Kelso, Jennifer L. Beck

Faculty of Science - Papers (Archive)

ESI mass spectrometry was used to assess the binding of 13-substituted, 5-nitro-2-phenylindolyl- and 2-naphthalenyl-based berberine derivatives to inter- and intramolecular G-quadruplex DNA molecules. In contrast with the parent berberine, the compounds showed selectivity for quadruplex over duplex DNA and stabilised the quadruplex structure. They represent a new class of quadruplex DNA-selective ligands. © 2010 The Royal Society of Chemistry.

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Copper-Mediated Cyclization-Halogenation And Cyclization-Cyanation Reactions Of Β-Hydroxyalkynes And O-Alkynylphenols And Anilines, Nalivela K. Swamy, Arife Yazici, Stephen G. Pyne Jan 2010

Copper-Mediated Cyclization-Halogenation And Cyclization-Cyanation Reactions Of Β-Hydroxyalkynes And O-Alkynylphenols And Anilines, Nalivela K. Swamy, Arife Yazici, Stephen G. Pyne

Faculty of Science - Papers (Archive)

The CuX (X = I, Br, Cl, CN)-mediated cyclization-halogenation and cyclization-cyanation reactions of β-hydroxyalkynes and o-alkynylphenol and -aniline derivatives give rise to 3-halo- and 3-cyanofuro[3,2-b]pyrroles, 3-iodo-, 3-bromo-, and 3-cyanobenzofurans, and 3-cyanoindoles, respectively. © 2010 American Chemical Society.

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Crosslinking Neat Ultrathin Films And Nanofibres Of Ph-Responsive Poly(Acrylic Acid) By Uv Radiation, Adrian Gestos, Philip G. Whitten, Geoffrey Maxwell Spinks, Gordon G. Wallace Jan 2010

Crosslinking Neat Ultrathin Films And Nanofibres Of Ph-Responsive Poly(Acrylic Acid) By Uv Radiation, Adrian Gestos, Philip G. Whitten, Geoffrey Maxwell Spinks, Gordon G. Wallace

Faculty of Science - Papers (Archive)

Electrospun polyelectrolyte hydrogel nanofibres are being developed for many applications including artificial muscles, scaffolds for tissue engineering, wound dressings and controlled drug release. For electrospun polyelectrolytes, a post-spinning crosslinking process is necessary for producing a hydrogel. Typically, radiation or thermal crosslinking routines are employed that require multifunctional crosslinking molecules and crosslink reaction initiators (free radical producers). Here, ultraviolet subtype-C (UVC) radiation was employed to crosslink neat poly(acrylic acid) (PAA) nanofibres and films to different crosslink densities. Specific crosslink initiators or crosslinking molecules are not necessary in this fast and simple process providing an advantage for biological applications. Scanning probe microscopy …

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The Dissociated Form Of Kappa-Casein Is The Precursor To Its Amyloid Fibril Formation, Heath Ecroyd, David Thorn, Yanqin Liu, John Carver Jan 2010

The Dissociated Form Of Kappa-Casein Is The Precursor To Its Amyloid Fibril Formation, Heath Ecroyd, David Thorn, Yanqin Liu, John Carver

Faculty of Science - Papers (Archive)

Bovine milk kappa-casein forms a self-associating oligomeric micelle-like species, in equilibrium with dissociated forms. In its native form, intra- and inter-molecular disulfide bonds lead to the formation of multimeric species ranging from monomers to decamers. When incubated under conditions of physiological pH and temperature, both reduced and non-reduced kappa-casein form highly structured beta-sheet amyloid fibrils. We investigated whether the precursor to kappa-casein fibril formation is a dissociated state of the protein or its oligomeric micelle-like form. We show that reduced kappa-casein is capable of forming fibrils well below its critical micelle concentration, i.e. at concentrations where only dissociated forms of …

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Equilibrium And Kinetic Modeling Of The Adsorption Of Indigo Carmine Onto Silk, Naparat Jiwalak, Saowanee Rattanaphani, John B. Bremner, Vichitr Rattanaphani Jan 2010

Equilibrium And Kinetic Modeling Of The Adsorption Of Indigo Carmine Onto Silk, Naparat Jiwalak, Saowanee Rattanaphani, John B. Bremner, Vichitr Rattanaphani

Faculty of Science - Papers (Archive)

Quantitative adsorption kinetic and equilibrium parameters for indigo carmine dyeing of silk were studied using UV-visible absorption spectroscopy. The effect of initial dye concentration, contact time, pH, material to liquor ratio (MLR), and temperature were determined to find the optimal conditions for adsorption. The mechanism of adsorption of indigo carmine dyeing onto silk was investigated using the pseudo first-order and pseudo second-order kinetic models. The adsorption kinetics was found to follow a pseudo-second-order kinetic model with an activation energy (E-a) of 51.06 kJ/mol. The equilibrium adsorption data of indigo carmine dye on silk were analyzed by the Langmuir and Freundlich …

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Carbon Nanotube Architectures As Catalyst Supports For Proton Exchange Membrane Fuel Cells, Weimin Zhang, Peter Sherrell, Andrew I. Minett, Joselito M. Razal, Jun Chen Jan 2010

Carbon Nanotube Architectures As Catalyst Supports For Proton Exchange Membrane Fuel Cells, Weimin Zhang, Peter Sherrell, Andrew I. Minett, Joselito M. Razal, Jun Chen

Faculty of Science - Papers (Archive)

Catalyst support materials exhibit great influence on the performance and durability of proton exchange membrane (PEM) fuel cells. This minireview article summarises recent developments into carbon nanotube-based support materials for PEM fuel cells, including the membrane electrode assembly (MEA). The advantages of using CNTs to promote catalyst performance and stability, a perspective on research directions and strategies to improve fuel cell performance and durability are discussed. It is hoped that this mini-review will act as a conduit for future developments in catalyst supports and MEA design for PEM fuel cells.

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Advanced Microwave-Assisted Production Of Hybrid Electrodes For Energy Applications, Peter Sherrell, Jun Chen, Joselito M. Razal, Ivan P. Nevirkovets, Carol Crean, Andrew I. Minett, Gordon G. Wallace Jan 2010

Advanced Microwave-Assisted Production Of Hybrid Electrodes For Energy Applications, Peter Sherrell, Jun Chen, Joselito M. Razal, Ivan P. Nevirkovets, Carol Crean, Andrew I. Minett, Gordon G. Wallace

Faculty of Science - Papers (Archive)

Carbon nanotubes are one of the most prominent materials in research for creating electrodes for portable electronics. When coupled with metallic nanoparticles the performance of carbon nanotube electrodes can be dramatically improved. Microwave reduction is an extremely rapid method for producing carbon nanotube-metallic nanoparticle composites, however this technique has so far been limitied to carbon nanotube soot. An understanding of the microwave process and the interactions of metallic nanoparticles with carbon nanotubes has allowed us to extend this promising functionalisation route to pre-formed CNT elelctrode architectures. Nanoparticle reduction onto pre-formed architectures reduces metallic nanoparticle waste as particles are not formed …

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Casey: The Daintree Of Antarctica, Dana Bergstrom, Sharon A. Robinson Jan 2010

Casey: The Daintree Of Antarctica, Dana Bergstrom, Sharon A. Robinson

Faculty of Science - Papers (Archive)

Antarctica is at the edge of life on the planet. Less than 0.5% of the Antarctic continent is ice-free rock or soil and therefore only tiny pockets of land are available for plants to establish. The Australian Antarctic Territory is home to some of the rarest ecosystems on the planet and the plant life at Casey is as good as it gets - Casey has the most extensive and best developed plant communities in continental Antarctica: it is the 'Daintree' of Antarctica. The largest plants are the mosses and they are like miniature old growth forests, growing incredibly slowly. A …

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Using An Unmanned Aerial Vehicle (Uav) For Ultra-High Resolution Mapping Of Antarctic Moss Beds, Arko Lucieer, Sharon A. Robinson, Darren Turner Jan 2010

Using An Unmanned Aerial Vehicle (Uav) For Ultra-High Resolution Mapping Of Antarctic Moss Beds, Arko Lucieer, Sharon A. Robinson, Darren Turner

Faculty of Science - Papers (Archive)

This study is the first to use an unmanned aerial vehicle (UAV) for mapping moss beds in Antarctica. Mosses can be used as indicators for the regional effects of climate change. Mapping and monitoring their extent and health is therefore important. UAV aerial photography provides ultra-high resolution spatial data for this purpose. In addition, we collected highly accurate and GPS transects to generate a detailed DEM. We calculated a topographic wetness index based on the DEM and compared it to the UAV photography to evaluate local growing conditions. This preliminary study shows that a UAV is an ideal platform for …

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Misidentification Of Tansy, Tanacetum Macrophyllum, As Yarrow, Achillea Grandifolia: A Health Risk Or Benefit?, Niko Radulovic, Polina Blagojevic, Danielle Skropeta, Aleksandra Zarubica, Bojan Zlatkovic, Radosav Palic´ Jan 2010

Misidentification Of Tansy, Tanacetum Macrophyllum, As Yarrow, Achillea Grandifolia: A Health Risk Or Benefit?, Niko Radulovic, Polina Blagojevic, Danielle Skropeta, Aleksandra Zarubica, Bojan Zlatkovic, Radosav Palic´

Faculty of Science - Papers (Archive)

Tansy, Tanacetum macrophyllum (Waldst. & Kit.) Sch. Bip., is often misidentified by herb collectors as yarrow, Achillea grand folia Friv. With the former, cases of poisoning induced by its ingestion are well documented, but the latter is widely used for ethnopharmacological purposes. The aim of this study was to estimate, based on the volatile metabolite profiles of the two species, the potential health risk connected with their misidentification. GC and GC-MS analysis of the essential oils hydrodistilled using a Clevenger-type apparatus from A. grandifolia, T macrophyllum, and two plant samples (reputedly of A. grandifolia, but in fact mixtures of A. …

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Reactions Of The Cn Radical With Benzene And Toluene: Product Detection And Low-Temperature Kinetics, Adam J. Trevitt, Fabien Goulay, Craig A. Taatjes, David L. Osborn, Stephen R. Leone Jan 2010

Reactions Of The Cn Radical With Benzene And Toluene: Product Detection And Low-Temperature Kinetics, Adam J. Trevitt, Fabien Goulay, Craig A. Taatjes, David L. Osborn, Stephen R. Leone

Faculty of Science - Papers (Archive)

Low-temperature rate coefficients are measured for the CN + benzene and CN + toluene reactions using the pulsed Laval nozzle expansion technique coupled with laser-induced fluorescence detection. The CN + benzene reaction rate coefficient at 105, 165, and 295 K is found to be relatively constant over this temperature range, (3.9−4.9) × 10−10 cm3 molecule−1 s−1. These rapid kinetics, along with the observed negligible temperature dependence, are consistent with a barrierless reaction entrance channel and reaction efficiencies approaching unity. The CN + toluene reaction is measured to have a rate coefficient of 1.3 × 10−10 cm3 molecule−1 s−1 at 105 …

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Environmental Effects Of Ozone Depletion And Its Interactions With Climate Change: 2010 Assessment, Sharon A. Robinson, Stephen R. Wilson Jan 2010

Environmental Effects Of Ozone Depletion And Its Interactions With Climate Change: 2010 Assessment, Sharon A. Robinson, Stephen R. Wilson

Faculty of Science - Papers (Archive)

This quadrennial Assessment was prepared by the Environmental Effects Assessment Panel (EEAP) for the Parties to the Montreal Protocol. The Assessment reports on key findings on environment and health since the last full Assessment of 2006, paying attention to the interactions between ozone depletion and climate change. Simultaneous publication of the Assessment in the scientific literature aims to inform the scientific community how their data, modeling and interpretations are playing a role in information dissemination to the Parties to the Montreal Protocol, other policymakers and scientists.

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Materialising Masculinity: Men And Interior Design, Andrew Gorman-Murray Jan 2010

Materialising Masculinity: Men And Interior Design, Andrew Gorman-Murray

Faculty of Science - Papers (Archive)

No abstract provided.

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Spatial Variability Of Cadmium, Copper, Manganese, Nickel And Zinc In The Port Curtis Estuary, Queensland, Australia, Brad M. Angel, Leigh T. Hales, Stuart L. Simpson, Simon C. Apte, Anthony A. Chariton, Damon A. Shearer, Dianne F. Jolley Jan 2010

Spatial Variability Of Cadmium, Copper, Manganese, Nickel And Zinc In The Port Curtis Estuary, Queensland, Australia, Brad M. Angel, Leigh T. Hales, Stuart L. Simpson, Simon C. Apte, Anthony A. Chariton, Damon A. Shearer, Dianne F. Jolley

Faculty of Science - Papers (Archive)

Port Curtis is a rapidly growing industrialised and urbanised harbour in Central Queensland, Australia. Water sampling surveys were undertaken in late 2003 and 2004, accompanied by additional sediment sampling to investigate the sources and behaviour of trace metals, and the effects of pH on metal partitioning between dissolved and particulate forms. Sampling and analyses of trace metals in waters and suspended particulates were undertaken along axial transects extending away from possible point-sources within the harbour. Additional sampling was undertaken in selected inlets and major freshwater sources to Port Curtis, including the Fitzroy River. Most dissolved metal concentrations were significantly elevated …

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Late Pliocene Age Of Glacial Deposits At Heidemann Valley East Antarctica: Evidence For The Last Major Glaciation In The Vestfold Hills, Eric Colhoun, Kevin W. Kiernan, Anne Mcconnell, P G Quilty, David Fink, Colin V. Murray-Wallace, J M Whitehead Jan 2010

Late Pliocene Age Of Glacial Deposits At Heidemann Valley East Antarctica: Evidence For The Last Major Glaciation In The Vestfold Hills, Eric Colhoun, Kevin W. Kiernan, Anne Mcconnell, P G Quilty, David Fink, Colin V. Murray-Wallace, J M Whitehead

Faculty of Science - Papers (Archive)

No abstract provided.

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Products Of The Benzene + O(3p) Reaction, Craig A. Taatjes, David L. Osborn, Talitha M. Selby, Giovanni Meloni, Adam J. Trevitt, Evgeny Epifanovsky, Anna I. Krylov, Baptiste Sirjean, Enoch Dames, Hai Wang Jan 2010

Products Of The Benzene + O(3p) Reaction, Craig A. Taatjes, David L. Osborn, Talitha M. Selby, Giovanni Meloni, Adam J. Trevitt, Evgeny Epifanovsky, Anna I. Krylov, Baptiste Sirjean, Enoch Dames, Hai Wang

Faculty of Science - Papers (Archive)

No abstract provided.

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Small Heat-Shock Proteins Interact With A Flanking Domain To Suppress Polyglutamine Aggregation, Amy L. Roberston, Stephen J. Headey, Helen M. Saunders, Heath Ecroyd, Martin J. Scanlon, John A. Carver, Stephen P. Bottomley Jan 2010

Small Heat-Shock Proteins Interact With A Flanking Domain To Suppress Polyglutamine Aggregation, Amy L. Roberston, Stephen J. Headey, Helen M. Saunders, Heath Ecroyd, Martin J. Scanlon, John A. Carver, Stephen P. Bottomley

Faculty of Science - Papers (Archive)

Small heat-shock proteins (sHsps) are molecular chaperones that play an important protective role against cellular protein misfolding by interacting with partially unfolded proteins on their off-folding pathway, preventing their aggregation. Polyglutamine (polyQ) repeat expansion leads to the formation of fibrillar protein aggregates and neuronal cell death in nine diseases, including Huntington disease and the spinocerebellar ataxias (SCAs). There is evidence that sHsps have a role in suppression of polyQ-induced neurodegeneration; for example, the sHsp alphaB-crystallin (αB-c) has been identified as a suppressor of SCA3 toxicity in a Drosophila model. However, the molecular mechanism for this suppression is unknown. In this …

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Ultrasensitive Detection Of Antibodies Using A New Tus-Ter-Lock Immunopcr System, Isabelle Morin, Nicholas E. Dixon, Patrick M. Schaeffer Jan 2010

Ultrasensitive Detection Of Antibodies Using A New Tus-Ter-Lock Immunopcr System, Isabelle Morin, Nicholas E. Dixon, Patrick M. Schaeffer

Faculty of Science - Papers (Archive)

A system consisting of a protein LG coated surface for the capture of mammalian antibodies (target), and an antigen fused to Tus and stoichiometrically linked to a DNA template via the Tus-Ter-lock sequence allowed the ultrasensitive detection of 5.5 attomol of target by real-time immunoPCR in complex media. © The Royal Society of Chemistry 2010.

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Train-Borne Measurements Of Tropical Methane Enhancements From Ephemeral Wetlands In Australia, Nicholas M. Deutscher, David W. T Griffith, Clare Paton-Walsh, Rittick Borah Jan 2010

Train-Borne Measurements Of Tropical Methane Enhancements From Ephemeral Wetlands In Australia, Nicholas M. Deutscher, David W. T Griffith, Clare Paton-Walsh, Rittick Borah

Faculty of Science - Papers (Archive)

We report greenhouse gas concentrations measured on a train covering a north-south transect through central Australia from north to south coast. During the monsoonal wet season we found significant enhancements in methane that correlate well with changing area of wetland inundation in Australian tropical savanna regions. We used a meteorological and air pollution model to quantify the ephemeral wetland fluxes necessary to cause the observed enhancements and estimate the constant Australian tropical wetland emissions. Annual Australian tropical ephemeral wetland fluxes are estimated at 0.4 +/- 0.2 Tg CH4, with permanent wetlands contributing a similar amount, 0.5 +/- 0.2 Tg CH4.

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Estimated Total Emissions Of Trace Gases From The Canberra Wildfires Of 2003: A New Method Using Satellite Measurements Of Aerosol Optical Depth & The Mozart Chemical Transport Model, Clare Paton-Walsh, L Emmons, Stephen R. Wilson Jan 2010

Estimated Total Emissions Of Trace Gases From The Canberra Wildfires Of 2003: A New Method Using Satellite Measurements Of Aerosol Optical Depth & The Mozart Chemical Transport Model, Clare Paton-Walsh, L Emmons, Stephen R. Wilson

Faculty of Science - Papers (Archive)

In this paper we describe a new method for estimating trace gas emissions from large vegetation fires using satellite measurements of aerosol optical depth (AOD) at 550 nm, combined with an atmospheric chemical transport model. The method uses a threshold value to screen out normal levels of AOD that may be caused by raised dust, sea salt aerosols or diffuse smoke transported from distant fires. Using this method we infer an estimated total emission of 15±5 Tg of carbon monoxide, 0.05±0.02 Tg of hydrogen cyanide, 0.11±0.03 Tg of ammonia, 0.25±0.07 Tg of formaldehyde, 0.03±0.01 of acetylene, 0.10±0.03 Tg of ethylene, …

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Specific Cellular Water Dynamics Observed In Vivo By Neutron Scattering And Nmr., Moeava Tehei, Marion Jasnin, Andreas Stadler, Giuseppe Zaccai Jan 2010

Specific Cellular Water Dynamics Observed In Vivo By Neutron Scattering And Nmr., Moeava Tehei, Marion Jasnin, Andreas Stadler, Giuseppe Zaccai

Faculty of Science - Papers (Archive)

Neutron scattering, by using deuterium labelling, revealed how intracellular water dynamics, measured in vivo in E. coli, human red blood cells and the extreme halophile, Haloarcula marismortui, depends on the cell type and nature of the cytoplasm. The method uniquely permits the determination of motions on the molecular length (Ba˚ ngstrøm) and time (pico- to nanosecond) scales. In the bacterial and human cells, intracellular water beyond the hydration shells of cytoplasmic macromolecules and membrane faces flows as freely as liquid water. It is not ‘‘tamed’’ by confinement. In contrast, in the extreme halophile archaeon, in addition to free and hydration …

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The Length Distributions Of Non-Coding And Coding Sequences In Relation To Gene Expression: A Study On Arabidopsis Thaliana, R Caldwell, J Kongcharoen, Y Lin, R Zhang Jan 2010

The Length Distributions Of Non-Coding And Coding Sequences In Relation To Gene Expression: A Study On Arabidopsis Thaliana, R Caldwell, J Kongcharoen, Y Lin, R Zhang

Faculty of Science - Papers (Archive)

No abstract provided.

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Structures, Biological Activities And Phylogenetic Relationships Of Terpenoids From Marine Ciliates Of The Genus Euplotes, Graziano Guella, Danielle Skropeta, Graziano Di Giuseppe, Fernando Dini Jan 2010

Structures, Biological Activities And Phylogenetic Relationships Of Terpenoids From Marine Ciliates Of The Genus Euplotes, Graziano Guella, Danielle Skropeta, Graziano Di Giuseppe, Fernando Dini

Faculty of Science - Papers (Archive)

In the last two decades, large scale axenic cell cultures of the marine species comprising the family Euplotidae have resulted in the isolation of several new classes of terpenoids with unprecedented carbon skeletons including the (i) euplotins, highly strained acetylated sesquiterpene hemiacetals; (ii) raikovenals, built on the bicyclo[3.2.0]heptane ring system; (iii) rarisetenolides and focardins containing an octahydroazulene moiety; and (iv) vannusals, with a unique C-30 backbone. Their complex structures have been elucidated through a combination of nuclear magnetic resonance spectroscopy, mass spectrometry, molecular mechanics and quantum chemical calculations. Despite the limited number of biosynthetic experiments having been performed, the large …

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Learning How To Be An Academic - The Story Of A New Academic In The Sciences, Danielle Skropeta Jan 2010

Learning How To Be An Academic - The Story Of A New Academic In The Sciences, Danielle Skropeta

Faculty of Science - Papers (Archive)

No abstract provided.

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Average Mass Scan Of The Total Ion Chromatogram Versus Percentage Chemical Composition In Multivariate Statistical Comparison Of Complex Volatile Mixtures, Niko Radulovic, Polina Blagojevic, Danielle Skropeta Jan 2010

Average Mass Scan Of The Total Ion Chromatogram Versus Percentage Chemical Composition In Multivariate Statistical Comparison Of Complex Volatile Mixtures, Niko Radulovic, Polina Blagojevic, Danielle Skropeta

Faculty of Science - Papers (Archive)

The analysis of complex volatile mixtures by gas chromatography-mass spectrometry (GC-MS) is a time-consuming process. It involves separation and identification of the components based on their retention times and fragmentation patterns, followed by determination of their relative percentages from integration of their peak areas. Herein we show that multivariate statistical analysis of the relative abundances of the m/z values obtained from the average mass scans (AMS) of the complex mixture is a faster and potentially more reliable method of assessing these mixtures. To achieve this, 15 model complex mixtures, were prepared comprising varying amounts of 10 different constituents. The AMS …

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Hydration Dependent Studies Of Highly Aligned Multilayer Lipid Membranes By Neutron Scattering , Marcus Trapp, Thomas Gutberlet, Fanni Juranyi, T Unruh, Bruno Demé, Moeava Tehei, Judith Peters Jan 2010

Hydration Dependent Studies Of Highly Aligned Multilayer Lipid Membranes By Neutron Scattering , Marcus Trapp, Thomas Gutberlet, Fanni Juranyi, T Unruh, Bruno Demé, Moeava Tehei, Judith Peters

Faculty of Science - Papers (Archive)

We investigated molecular motions on a picoseconds timescale of 1,2-Dimyristoyl-sn- Glycero-3-Phosphocholine (DMPC) model membranes as a function of hydration by using elastic and quasielastic neutron scattering. Two different hydrations corresponding to approximately nine and twelve water molecules per lipid were studied, the latter being the fully hydrated state. In our study we focused on head group motions by using chain deuterated lipids. Information on in-plane and out-of-plane motions could be extracted by using solid supported DMPC multilayers. Our studies confirm and complete former investigations by K¨onig et al. and Rheinst¨adter et al. who describe the dynamics of lipidmembranes, but did …

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Variable Direct And Indirect Effects Of A Habitat-Modifying Invasive Species On Mortality Of Native Fauna, James E. Byers, Jeffrey T. Wright, Paul E. Gribben Jan 2010

Variable Direct And Indirect Effects Of A Habitat-Modifying Invasive Species On Mortality Of Native Fauna, James E. Byers, Jeffrey T. Wright, Paul E. Gribben

Faculty of Science - Papers (Archive)

Habitat-modifying invasive species can influence rates of predation on native prey either directly by providing protective structure or indirectly by modifying traits of prey species responding to the habitat. The alga Caulerpa taxifolia is one of the most successful invasive species of shallow-water marine systems globally, often provisioning habitat in areas previously lacking in vegetated structure. We experimentally evaluated the direct effect of Caulerpa to provide refuge for the native clam Anadara trapezia and how this balances with its influence on two trait-mediated indirect interactions that may increase Anadara's susceptibility to predators. Specifically, Caulerpa's alteration of physical and chemical properties …

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The Use Of Cattle Ear-Tags As Patagial Markers For Large Birds-A Field Assessment On Adult And Nestling Australian White Ibis, John M. Martin, Richard E. Major Jan 2010

The Use Of Cattle Ear-Tags As Patagial Markers For Large Birds-A Field Assessment On Adult And Nestling Australian White Ibis, John M. Martin, Richard E. Major

Faculty of Science - Papers (Archive)

To test the effectiveness of patagial marking with cattle ear-tags for Australian White Ibis (Threskiornis molucca), 105 adults and 58 nestlings were fitted with tags on each wing. Resighting frequency of adults, survival of nestlings, breeding behavior and foraging movements were monitored. The resighting frequency of wing-tagged adults was compared with resightings of 160 adults marked with colored leg-bands. Survival rates of wing-tagged nestlings were compared with an equal sample of 58 nestlings fitted with colored leg-bands. Over six months, 96% of tagged adults were resighted and there was no indication of impaired flight, with foraging movements ranging up to …

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Myriocin-Mediated Up-Regulation Of Hepatocyte Apoa-I Synthesis Is Associated With Erk Inhibition, Elias N. Glaros, Woojin Scott Kim, Brett Garner Jan 2010

Myriocin-Mediated Up-Regulation Of Hepatocyte Apoa-I Synthesis Is Associated With Erk Inhibition, Elias N. Glaros, Woojin Scott Kim, Brett Garner

Faculty of Science - Papers (Archive)

Sphingolipids including sphingomyelin have been implicated as potential atherogenic lipids. Studies in apoE (apolipoprotein E)-null mice have revealed that the serine palmitoyltransferase inhibitor myriocin reduces plasma levels of sphingomyelin, ceramide, sphingosine-I-phosphate and glycosphingolipids and that this is associated with potent inhibition of atherosclerosis. Interestingly, hepatic apoA-I (apolipoprotein A-I) synthesis and plasma HDL (high-density lipoprotein)cholesterol levels were also increased in apoE-null mice treated with myriocin. Since myriocin is a known inhibitor of ERK (extracellular-signal-related kinase) phosphorylation, we assessed the possibility that myriocin may be acting to increase hepatic apoA-I production via this pathway. To address this, HepG2 cells and primary mouse …

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Organic Bionics, Gordon G. Wallace, Simon E. Moulton, Caiyun Wang Jan 2010

Organic Bionics, Gordon G. Wallace, Simon E. Moulton, Caiyun Wang

Faculty of Science - Papers (Archive)

Bionic technology involves the efficient integration of biology and electronics and is providing the basis for significant improvements in a number of medical treatments. The use of organic conducting polymers to provide a compatible multifunctional platform to interface the world of biology and electronics has attracted an increasing amount of attention over the past 15 years. This paper will discuss advances being made in the development of organic bionics and their application to improved health strategies. © 2010 Copyright SPIE - The International Society for Optical Engineering.

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