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2007

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Articles 4711 - 4740 of 6758

Full-Text Articles in Physical Sciences and Mathematics

Copper And Zinc Tolerance Of Two Tropical Microalgae After Copper Acclimation, Hilary L. Johnson, Jenny L. Stauber, Merrin Adams S, Dianne F. Jolley Jan 2007

Copper And Zinc Tolerance Of Two Tropical Microalgae After Copper Acclimation, Hilary L. Johnson, Jenny L. Stauber, Merrin Adams S, Dianne F. Jolley

Faculty of Science - Papers (Archive)

Current toxicity tests with microalgae are often criticized as being overly sensitive to metals because algae are cultured in metal-deficient media. If such bioassays overestimate copper toxicity in surface waters, the relevance of water quality guidelines derived from these tests is questionable. In this study, the effect of acclimation to copper at environmentally relevant concentrations, on the sensitivity of the marine diatom Nitzschia closterium and the freshwater green alga Chlorella sp. to copper and zinc was examined. N. closterium was acclimated in culture medium containing 5 or 25 g Cu L-1 for 200 days, while Chlorella sp. was acclimated in …

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Validation Of Mipas Hno3 Operational Data, D Y. Wang, M Hopfner, C E. Blom, W E. Ward, Nicholas B. Jones, G C. Toon, E Mahieu, S Wood, M De Maziere, P Demoulin, T Blumenstock, F Hase, H W. Fischer, D Smale, G Bianchini, G Redaelli, F Mencaraglia, J Urban, D Murtagh, M Pirre, V Catoire, N Huret, H Nakajima, C Piccolo, T Sugita, A Kleinbohl, U Cortesi, C Boone, H Oelhaf, C Keim, G Y. Liu, G Wetzel, S Mikuteit, K A. Walker, P Bernath, C Vigouroux, J Kuttippurath Jan 2007

Validation Of Mipas Hno3 Operational Data, D Y. Wang, M Hopfner, C E. Blom, W E. Ward, Nicholas B. Jones, G C. Toon, E Mahieu, S Wood, M De Maziere, P Demoulin, T Blumenstock, F Hase, H W. Fischer, D Smale, G Bianchini, G Redaelli, F Mencaraglia, J Urban, D Murtagh, M Pirre, V Catoire, N Huret, H Nakajima, C Piccolo, T Sugita, A Kleinbohl, U Cortesi, C Boone, H Oelhaf, C Keim, G Y. Liu, G Wetzel, S Mikuteit, K A. Walker, P Bernath, C Vigouroux, J Kuttippurath

Faculty of Science - Papers (Archive)

Nitric acid (HNO3) is one of the key products that are operationally retrieved by the European Space Agency (ESA) from the emission spectra measured by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboard ENVISAT. The product version 4.61/4.62 for the observation period between July 2002 and March 2004 is validated by comparisons with a number of independent observations from ground-based stations, aircraft/balloon campaigns, and satellites. Individual HNO3 profiles of the ESA MIPAS level-2 product show good agreement with those of MIPAS-B and MIPAS-STR (the balloon and aircraft version of MIPAS, respectively), and the balloon-borne infrared spectrometers MkIV and SPIRALE, …

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Photocatalytic Oxidation Of Methanol Using Titanium Dioxide/Single-Walled Carbon Nanotube Composite, Jun Chen, Carol M. Lynam, Chonlada Dechakiatkrai, Gordon G. Wallace, Sukon Phanichphant Jan 2007

Photocatalytic Oxidation Of Methanol Using Titanium Dioxide/Single-Walled Carbon Nanotube Composite, Jun Chen, Carol M. Lynam, Chonlada Dechakiatkrai, Gordon G. Wallace, Sukon Phanichphant

Faculty of Science - Papers (Archive)

Titanium dioxide/single-walled carbon nanotube TiO2/SWNT composites were prepared for photocatalytic applications. Thecomposites were characterized using UV-visible and Raman spectroscopy, zeta-potential measurements, cyclic voltammetrycoupled with a photoreactor, scanning electron microscopy, and transmission electron microscopy coupled with energy dispersiveX-ray spectroscopy. The photocatalytic activity of TiO2 and the TiO2/SWNT composite was investigated using the photo-oxidationof methanol in sulfuric acid as supporting electrolyte. The results indicate that the TiO2/SWNT composite enhances the photocatalyticactivity compared to TiO2 alone. Electrochemical studies of the TiO2/SWNT composite were also carried out in varioussupporting electrolytes and the presence of SWNTs was shown to increase the current achieved in voltammetric …

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Validation Of Mipas Clono2 Measurements, M Hopfner, T Von Clarmann, Nicholas B. Jones, David W. Griffith, G C. Toon, E Mahieu, R Zander, S Wood, T Blumenstock, J Hannigan, M Coffey, F Hase, H W. Fischer, J Mellqvist, A Strandberg, Thorsten Warneke, C E. Blom, C Piesch, K W. Jucks, K Chance, W Kouker, T Reddmann, C Boone, H Oelhaf, C Keim, N Glatthor, M Kiefer, S Kellmann, R Ruhnke, A Linden, G Y. Liu, B Funke, M Milz, M Schneider, G Wetzel, T Steck, A Kleinert, S Mikuteit, G P. Stiller, U Grabowski, K A. Walker, P Bernath, F Friedl-Vallon, Justus Notholt Jan 2007

Validation Of Mipas Clono2 Measurements, M Hopfner, T Von Clarmann, Nicholas B. Jones, David W. Griffith, G C. Toon, E Mahieu, R Zander, S Wood, T Blumenstock, J Hannigan, M Coffey, F Hase, H W. Fischer, J Mellqvist, A Strandberg, Thorsten Warneke, C E. Blom, C Piesch, K W. Jucks, K Chance, W Kouker, T Reddmann, C Boone, H Oelhaf, C Keim, N Glatthor, M Kiefer, S Kellmann, R Ruhnke, A Linden, G Y. Liu, B Funke, M Milz, M Schneider, G Wetzel, T Steck, A Kleinert, S Mikuteit, G P. Stiller, U Grabowski, K A. Walker, P Bernath, F Friedl-Vallon, Justus Notholt

Faculty of Science - Papers (Archive)

Altitude profiles of ClONO2 retrieved with the IMK (Institut fur Meteorologie und Klimaforschung) science-oriented data processor from MIPAS/Envisat (Michelson Interferometer for Passive Atmospheric Sounding on Envisat) mid-infrared limb emission measurements between July 2002 and March 2004 have been validated by comparison with balloon-borne (Mark IV, FIRS2, MIPASB), airborne (MIPAS-STR), ground-based (Spitsbergen, Thule, Kiruna, Harestua, Jungfraujoch, Izana, Wollongong, Lauder), and spaceborne (ACE-FTS) observations. With few exceptions we found very good agreement between these instruments and MIPAS with no evidence for any bias in most cases and altitude regions. For balloon-borne measurements typical absolute mean differences are below 0.05 ppbv over the …

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Syntheses Of Spiro[Cyclopropane-1,3'-Oxindole]-2-Carboxylic Acid And Cyclopropa[C]Quinoline-7b-Carboxylic Acid And Their Derivatives, Sarah Yong, Alison T. Ung, Stephen G. Pyne, Brian W. Skelton, Allan H. White Jan 2007

Syntheses Of Spiro[Cyclopropane-1,3'-Oxindole]-2-Carboxylic Acid And Cyclopropa[C]Quinoline-7b-Carboxylic Acid And Their Derivatives, Sarah Yong, Alison T. Ung, Stephen G. Pyne, Brian W. Skelton, Allan H. White

Faculty of Science - Papers (Archive)

The synthesis of spiro[cyclopropane-1,3′-oxindole]-2-carboxylic acid, including novel 3-(2- and 3-pyridyl)-substituted analogues and the novel cyclopropa[c]quinoline-7b-carboxylic acid and their ester and amide derivatives is described. These syntheses involve diastereoselective cyclopropanation reactions of methyl 2-(2-nitrophenyl)acrylate and (3E)-(pyridin-2-ylmethylene)- and (3E)-(pyridin-3-ylmethylene)-1,3-dihydro-2H-indol-2-one with ethyl (dimethyl sulfuranylidene) acetate (EDSA). The synthesis of methyl cyclopropa[c]quinoline-7b-carboxylate involves a regioselective reductive cyclization of a nitro-diester precursor. The relative stereochemistry of key compounds has been determined by single-crystal X-ray structural analysis.

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Synthesis Of Benzo[C]Chromen-6-Ones Via Novel Cyclic Aryl-Pd(Ii)-Ester Enolate Intermediates, Stephen R. Taylor, Alison T. Ung, Stephen G. Pyne Jan 2007

Synthesis Of Benzo[C]Chromen-6-Ones Via Novel Cyclic Aryl-Pd(Ii)-Ester Enolate Intermediates, Stephen R. Taylor, Alison T. Ung, Stephen G. Pyne

Faculty of Science - Papers (Archive)

The examination of the palladium catalysed arylation reactions of mono-iodo derivatives of the phenyl and benzyl esters of benzoic acid, phenylacetic acid and dehydrocinnamic acid has resulted in the formation of benzo[c]chromen-6-ones, unexpected cinnamate and succinate products and diphenyl dimers. Many of these products can be rationalized as arising from novel cyclic ArPd(II)-enolate intermediates, formed by intramolecular C-H activation by ArPd(II).

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Solution Structure Of Domains Iva And V Of The Tau Subunit Of Escherichia Coli Dna Polymerase Iii And Interaction With The Alpha Subunit, Xun-Cheng Su, Slobodan Jergic, Max A Keniry, Nicholas E. Dixon, Gottfried Otting Jan 2007

Solution Structure Of Domains Iva And V Of The Tau Subunit Of Escherichia Coli Dna Polymerase Iii And Interaction With The Alpha Subunit, Xun-Cheng Su, Slobodan Jergic, Max A Keniry, Nicholas E. Dixon, Gottfried Otting

Faculty of Science - Papers (Archive)

The solution structure of the C-terminal Domain V of the τ subunit of E. coli DNA polymerase III was determined by nuclear magnetic resonance (NMR) spectroscopy. The fold is unique to τ subunits. Amino acid sequence conservation is pronounced for hydrophobic residues that form the structural core of the protein, indicating that the fold is representative for τ subunits from a wide range of different bacteria. The interaction between the polymerase subunits τ and α was studied by NMR experiments where α was incubated with full-length C-terminal domain (τC16), and domains shortened at the C-terminus by 11 …

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Chilling Out In The Country? Interrogating Daylesford As A 'Gay/Lesbian Rural Idyll', Andrew W. Gorman-Murray, Gordon R. Waitt, Christopher R. Gibson Jan 2007

Chilling Out In The Country? Interrogating Daylesford As A 'Gay/Lesbian Rural Idyll', Andrew W. Gorman-Murray, Gordon R. Waitt, Christopher R. Gibson

Faculty of Science - Papers (Archive)

Recent scholarship suggests that the gay/lesbian idyllisation of rural places is an urban construct, constituted through metropolitan sensibilities, communities and imaginaries. We extend this work through examining the construction of Daylesford, Victoria, as a ‘gay/lesbian rural idyll’. Daylesford annually hosts ChillOut, Australia’s largest rural gay/lesbian festival, which underpins its idyllisation. Utilising data drawn from fieldwork conducted at the 2006 festival and commentaries circulated in the gay/lesbian media, we argue that not only is Daylesford idyllised in the Australian gay/lesbian imaginary, but that rurality and urbanity are hybridised in its framing as a ‘gay/lesbian rural idyll’. This is manifested in several …

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The Repressor Element 1-Silencing Transcription Factor Regulates Heart-Specific Gene Expression Using Multiple Chromatin-Modifying Complexes, Andrew J. Bingham, Lezanne Ooi, Lukasz Kozera, Edward White, Ian C. Wood Jan 2007

The Repressor Element 1-Silencing Transcription Factor Regulates Heart-Specific Gene Expression Using Multiple Chromatin-Modifying Complexes, Andrew J. Bingham, Lezanne Ooi, Lukasz Kozera, Edward White, Ian C. Wood

Faculty of Science - Papers (Archive)

Cardiac hypertrophy is associated with a dramatic change in the gene expression profile of cardiac myocytes. Many genes important during development of the fetal heart but repressed in the adult tissue are reexpressed, resulting in gross physiological changes that lead to arrhythmias, cardiac failure, and sudden death. One transcription factor thought to be important in repressing the expression of fetal genes in the adult heart is the transcriptional repressor REST (repressor element 1-silencing transcription factor). Although REST has been shown to repress several fetal cardiac genes and inhibition of REST function is sufficient to induce cardiac hypertrophy, the molecular mechanisms …

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Dynamics Of A Salinity-Prone Agricultural Catchment Driven By Markets, Farmers' Attitudes And Climate Change, S Asseng, A Dray, Pascal Perez, X Su, J P. Muller Jan 2007

Dynamics Of A Salinity-Prone Agricultural Catchment Driven By Markets, Farmers' Attitudes And Climate Change, S Asseng, A Dray, Pascal Perez, X Su, J P. Muller

SMART Infrastructure Facility - Papers

An agent-based simulation model has been developed with CORMAS combining simplified bio-physical processes of land cover, dry-land salinity changes, rainfall, farm profitability and farmer decisions on land uses in a dry-land agricultural catchment (no irrigation). Simulated farmers formulate individual decisions dealing with land use changes based on the combined performance of their past land cover productivity and market returns. The willingness to adapt to market drivers and the ability to maximize returns varies across farmers. In addition, farmers in the model can demonstrate various attitudes towards salinity mitigation as a consequence of experiencing and perceiving salinity on their farm, in …

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Short- And Long-Term Operation Of The Lutein-Epoxide Cycle In Light-Harvesting Antenna Complexes, Shizue Matsubara, Tomas Morosinotto, C Barry Osmond, Roberto Bassi Jan 2007

Short- And Long-Term Operation Of The Lutein-Epoxide Cycle In Light-Harvesting Antenna Complexes, Shizue Matsubara, Tomas Morosinotto, C Barry Osmond, Roberto Bassi

Faculty of Science - Papers (Archive)

The lutein-5,6-epoxide (Lx) cycle operates in some plants between lutein (L) and its monoepoxide, Lx. Whereas recent studies have established the photoprotective roles of the analogous violaxanthin cycle, physiological functions of the Lx cycle are still unknown. In this article, we investigated the operation of the Lx cycle in light-harvesting antenna complexes (Lhcs) of Inga sapindoides Willd, a tropical tree legume accumulating substantial Lx in shade leaves, to identify the xanthophyll-binding sites involved in short- and long-term responses of the Lx cycle and to analyze the effects on light-harvesting efficiency. In shade leaves, Lx was converted into L upon light …

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Changes In Tropospheric Composition And Air Quality Due To Stratospheric Ozone Depletion And Climate Change, Stephen R. Wilson, Keith R. Solomon, Xiaoyan Tang Jan 2007

Changes In Tropospheric Composition And Air Quality Due To Stratospheric Ozone Depletion And Climate Change, Stephen R. Wilson, Keith R. Solomon, Xiaoyan Tang

Faculty of Science - Papers (Archive)

It is well-understood that reductions in air quality play a significant role in both environmental and human health. Interactions between ozone depletion and global climate change will significantly alter atmospheric chemistry which, in turn, will cause changes in concentrations of natural and human-made gasses and aerosols. Models predict that tropospheric ozone near the surface will increase globally by up to 10 to 30 ppbv (33 to 100% increase) during the period 2000 to 2100. With the increase in the amount of the stratospheric ozone, increased transport from the stratosphere to the troposphere will result in different responses in polluted and …

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Recracking Of Jointed Rock Masses In The Sydney Basin, New South Wales, Australia, H. Memarian, C. L. Fergusson Jan 2007

Recracking Of Jointed Rock Masses In The Sydney Basin, New South Wales, Australia, H. Memarian, C. L. Fergusson

Faculty of Science - Papers (Archive)

Fracture mapping of Late Permian – Early Triassic flat-lying sedimentary rocks in the Sydney Basin, New South Wales, Australia, shows that joints developed originally in extension were faulted in subsequent events. Joints with a regional distribution fall into two, early and late formed groups. Group I joints propagated horizontally and never interfered with each other. These joints were subsequently reworked or recracked. Recracking commenced with jointing and continued with lateral slip. Faulted joints grew horizontally by linking of recracked segments. En echelon arrays are the result of vertical propagation of faulted joints into intact rock. Recracking of rock also resulted …

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Polypyrrole Based Switchable Filter System, Yanzhe Wu, Lorrain Nolan, Shirley Coyle, King Tong Lau, Gordon G. Wallace, Dermot Diamond Jan 2007

Polypyrrole Based Switchable Filter System, Yanzhe Wu, Lorrain Nolan, Shirley Coyle, King Tong Lau, Gordon G. Wallace, Dermot Diamond

Faculty of Science - Papers (Archive)

BioTex is an EU funded project aiming to develop textile-based sensors for monitoring biological fluids. In the context of the project, there is a need to develop an effective sample delivery strategy for the wearable biomedical devices. A compact, electroactive switchable membrane would be useful as a valve to control the sample delivery within such devices. A method that employed inherently conducting polymers deposited onto a permeable substrate to form a switchable membrane was investigated [1, 2, 3]. By application of specific voltages, the permeability (pore size) of the membrane can be switched to swollen (expand) and contracted forms, which …

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Chemical Vapour Deposition Grown Carbon Nanotubes For Interconnect Technology, R. W. Leahy, E. Lahiff, A Minett, W. J. Blau Jan 2007

Chemical Vapour Deposition Grown Carbon Nanotubes For Interconnect Technology, R. W. Leahy, E. Lahiff, A Minett, W. J. Blau

Faculty of Science - Papers (Archive)

Multiwall carbon nanotubes have been grown by catalytic chemical vapour deposition using iron catalyst particles drop cast onto etched silicon wafers. The catalyst used was poly(styrene-vinylferrocene) in toluene solution which has an iron content of 2.1%. The etched silicon wafers have trench regions of varying widths ranging from 0.32 to 1 μm. For trench widths below 0.5 μm the number of “interconnecting” tubes growing from one side of the trench to the other increases sharply. A significant proportion of these “interconnects” are found to be Y-junction and multiple junction MWNTs. A systematic study of the effects of each of the …

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Direct Imaging Of Lipid-Ion Network Formation Under Physiological Conditions By Frequency Modulation Atomic Force Microscopy, Michael J. Higgins, Suzi P. Jarvis, Takeshi Fukuma Jan 2007

Direct Imaging Of Lipid-Ion Network Formation Under Physiological Conditions By Frequency Modulation Atomic Force Microscopy, Michael J. Higgins, Suzi P. Jarvis, Takeshi Fukuma

Faculty of Science - Papers (Archive)

Various metal cations in physiological solutions interact with lipid headgroups in biological membranes, having an impact on their structure and stability, yet little is known about the molecular-scale dynamics of the lipid-ion interactions. Here we directly investigate the extensive lipid-ion interaction networks and their transient formation between headgroups in a dipalmitoylphosphatidylcholine bilayer under physiological conditions. The spatial distribution of ion occupancy is imaged in real space by frequency modulation atomic force microscopy with sub-Angstrom resolution.

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2635 Ma Amphibolite Facies Gold Mineralisation Near A Terrane Boundary (Suture?) On Storo, Nuuk Region, Southern West Greenland, Allen P. Nutman, Ole Christiansen, Clark R. L Friend Jan 2007

2635 Ma Amphibolite Facies Gold Mineralisation Near A Terrane Boundary (Suture?) On Storo, Nuuk Region, Southern West Greenland, Allen P. Nutman, Ole Christiansen, Clark R. L Friend

Faculty of Science - Papers (Archive)

Gold on Storø (in the Nuuk region of southern West Greenland) occurs in a slice of strongly deformed, amphibolite facies, Neoarchaean quartzo-feldspathic metasedimentary rocks and amphibolites in tectonic contact with the Eoarchaean Færingehavn terrane and the Meso- to Neoarchaean Akia terrane. The gold is associated with either löllingite (FeAs) + arsenopyrite or pyrrhotite, which belong with the amphibolite facies silicate mineral assemblages. Zircons were U/Pb dated by SHRIMP to constrain the timing of mineralisation. The 2700–2830 Ma oscillatory-zoned, high Th/U volcano-sedimentary zircon as whole grains and cores are interpreted to give the maximum depositional age of the rocks hosting the …

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Comment On "A Vestige Of Earth's Oldest Ophiolite", Allen P. Nutman, Clark R. L Friend Jan 2007

Comment On "A Vestige Of Earth's Oldest Ophiolite", Allen P. Nutman, Clark R. L Friend

Faculty of Science - Papers (Archive)

No abstract provided.

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Mimicking Phosphorylation Of Alphab-Crystallin Affects Its Chaperone Activity, Heath W. Ecroyd, Sarah Meehan, J Horwitz, Andrew Aquilina, J L Benesch, C V Robinson, Cait Macphee, John Carver Jan 2007

Mimicking Phosphorylation Of Alphab-Crystallin Affects Its Chaperone Activity, Heath W. Ecroyd, Sarah Meehan, J Horwitz, Andrew Aquilina, J L Benesch, C V Robinson, Cait Macphee, John Carver

Faculty of Science - Papers (Archive)

No abstract provided.

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Potential Roles Of Abundant Extracellular Chaperones In The Control Of Amyloid Formation And Toxicity, Mark R. Wilson, Justin J. Yerbury, Stephen Poon Jan 2007

Potential Roles Of Abundant Extracellular Chaperones In The Control Of Amyloid Formation And Toxicity, Mark R. Wilson, Justin J. Yerbury, Stephen Poon

Faculty of Science - Papers (Archive)

The in vivo formation of fibrillar proteinaceous deposits called amyloid is associated with more than 40 serious human diseases, collectively referred to as protein deposition diseases. In many cases the amyloid deposits are extracellular and are found associated with newly identified abundant extracellular chaperones (ECs). Evidence is presented suggesting an important regulatory role for ECs in amyloid formation and disposal in the body. A model is presented which proposes that, under normal conditions, ECs stabilize extracellular misfolded proteins by binding to them, and then guide them to specific cell receptors for uptake and subsequent degradation. Thus ECs and their receptors …

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An Alternative Approach To Coal Mine Site Water Management: A Case Study On West Cliff Colliery, Antony Volcich, Stephen A. Short, Adrian C. Hutton, Robert John Morrison Jan 2007

An Alternative Approach To Coal Mine Site Water Management: A Case Study On West Cliff Colliery, Antony Volcich, Stephen A. Short, Adrian C. Hutton, Robert John Morrison

Faculty of Science - Papers (Archive)

The provision of water supply, its usage and discharge, are major concerns for all mines, often accounting for a significant portion of the daily running costs. To reduce these costs, mines will collect as much site runoff as possible, and recycle the water whenever economically feasible. The constant recycling of on-site waters can mean that, over time, the levels of salinity, acidity or alkalinity, or other contaminants may build up within the internal water management system to a point which may lead to problems with licensed discharge requirements. This project investigated the water quality at West Cliff Colliery, in order …

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Smart Nanotextiles: A Review Of Materials And Applications, Gordon G. Wallace, Danilo De Rossi, Yanzhe Wu, King-Tong Lau, Shirley Coyle, Dermot Diamond Jan 2007

Smart Nanotextiles: A Review Of Materials And Applications, Gordon G. Wallace, Danilo De Rossi, Yanzhe Wu, King-Tong Lau, Shirley Coyle, Dermot Diamond

Faculty of Science - Papers (Archive)

The development of smart nanotextiles has the potential to revolutionize the functionality of our clothing and the fabrics in our surroundings. Nanoscale manipulation results in new functionalities for intelligent textiles, including self-cleaning, sensing, actuating, and communicating. This is made possible by such developments as new materials, fibers, and finishings; inherently conducting polymers; carbon nanotubes; and antimicrobial nanocoatings. These additional functionalities have numerous applications, encompassing healthcare, sports, military applications, and fashion. The wearer and the surrounding environment may be monitored in an innocuous manner, giving continuous updates of individual health status or environmental hazards. More generally, smart textiles become a critical …

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Conducting Polymers With Fibrillar Morphology Synthesized In A Biphasic Ionic Liquid/Water System, J.M. Pringle, Orawan Ngamna, Carol M. Lynam, Gordon G. Wallace, Maria Forsyth, Douglas Macfarlane Jan 2007

Conducting Polymers With Fibrillar Morphology Synthesized In A Biphasic Ionic Liquid/Water System, J.M. Pringle, Orawan Ngamna, Carol M. Lynam, Gordon G. Wallace, Maria Forsyth, Douglas Macfarlane

Faculty of Science - Papers (Archive)

The synthesis of poly(pyrrole), poly(terthiophene), and poly(3,4-ethylenedioxythiophene) with unusual fibrillar morphologies has been achieved by chemical polymerization in a biphasic ionic liquid/water system. Use of aqueous gold chloride as the oxidant, with the monomers dissolved in a hydrophobic ionic liquid, allows the polymerization to occur at the ionic liquid/water interface. The resultant conducting polymer fibrils are, on average, 50−100 nm wide and can be thousands of nanometers long. The polymers produced in this ionic liquid system are compared to those synthesized in a biphasic chloroform/water system.

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Reef Development At High-Latitudes During Multiple Interglacial Cycles: New Evidence From Lord Howe Island, Southwestern Pacific, David Kennedy, Colin D. Woodroffe, J -X Zhao Jan 2007

Reef Development At High-Latitudes During Multiple Interglacial Cycles: New Evidence From Lord Howe Island, Southwestern Pacific, David Kennedy, Colin D. Woodroffe, J -X Zhao

Faculty of Science - Papers (Archive)

Reef development during past Interglacial periods, when sea level and sea surface temperatures were higher than today, provide unique insights into how reef systems may respond to projected human-induced global warming. Lord Howe Island currently represents the southernmost limit of reef development in the Pacific. Reef growth of Pleistocene age has been inferred to have occurred around the island, and this paper provides the fi rst detailed descriptions on the character of this development. Two phases of reef growth are identifi ed, which occurred as isolated fringing reefs along the edge of the basaltic hills of the island. Uranium-series dating …

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Finding Similarity Relations In Presence Of Taxonomic Relations In Ontology Learning Systems, A. R. Vazifedoost, Farhad Oroumchian, M. Rahgozar Jan 2007

Finding Similarity Relations In Presence Of Taxonomic Relations In Ontology Learning Systems, A. R. Vazifedoost, Farhad Oroumchian, M. Rahgozar

University of Wollongong in Dubai - Papers

Ontology learning tries to find ontological relations, by an automatic process. Similarity relationships are one of non-taxonomic relations which may be included in ontology. Our idea is that in presence of taxonomic relations we are able to extract more useful non-taxonomic similarity relations. In this paper we investigate the specifications of an implemented system for extracting these relations by means of new context extraction method which uses taxonomic relations.

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Association Testing By Haplotype-Sharing Methods Applicable To Whole-Genome Analysis, Ilja M. Nolte, Andre R. De Vries, Geert T. Sijker, Ritsert C. Jansen, Dumitru Brinza, Alexander Zelikovskiy, Gerard J. Te Meerman Jan 2007

Association Testing By Haplotype-Sharing Methods Applicable To Whole-Genome Analysis, Ilja M. Nolte, Andre R. De Vries, Geert T. Sijker, Ritsert C. Jansen, Dumitru Brinza, Alexander Zelikovskiy, Gerard J. Te Meerman

Computer Science Faculty Publications

We propose two new haplotype-sharing methods for identifying disease loci: the haplotype sharing statistic (HSS), which compares length of shared haplotypes between cases and controls, and the CROSS test, which tests whether a case and a control haplotype show less sharing than two random haplotypes. The significance of the HSS is determined using a variance estimate from the theory of U-statistics, whereas the significance of the CROSS test is estimated from a sequential randomization procedure. Both methods are fast and hence practical, even for whole-genome screens with high marker densities. We analyzed data sets of Problems 2 and 3 of …

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Role Of The Semi-Lunar Process In Locust Jumping, David W. Cofer, James Reid, Ying Zhu, Gennady Cymbalyuk, William J. Heitler, Donald H. Edwards Jan 2007

Role Of The Semi-Lunar Process In Locust Jumping, David W. Cofer, James Reid, Ying Zhu, Gennady Cymbalyuk, William J. Heitler, Donald H. Edwards

Neuroscience Institute Faculty Publications

We have developed a software toolkit, AnimatLab, which allows researchers to build and test virtual organisms. We used this software to build a virtual locust, and then asked how the semi-lunar process is utilized during jumping, and how manipulation or removal of the virtual SLP influences jump dynamics.

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Critical Mathematics Pedagogy: Transforming Teachers’ Practices, David W. Stinson, Carla R. Bidwell, Christopher C. Jett, Ginny C. Powell, Mary M. Thurman Jan 2007

Critical Mathematics Pedagogy: Transforming Teachers’ Practices, David W. Stinson, Carla R. Bidwell, Christopher C. Jett, Ginny C. Powell, Mary M. Thurman

Middle-Secondary Education and Instructional Technology Faculty Publications

This study reports the effects of a graduate-level mathematics education course that focused on critical theory and teaching for social justice on the pedagogical philosophies and practices of three mathematics teachers (middle, high school, and 2-year college). The study employed Freirian participatory research methodology; in fact, the participants were not only co-researchers, but also co-authors of the study. Data collection included reflective essays, journals, and “storytelling”; data analysis was a combination of textual analysis and autoethnography. The findings report that the teachers believed that the course provided not only a new language but also a legitimization to transform their pedagogical …

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What Is Mathematics?: Teachers Exploring The Philosophy Of Mathematics, Kimberly White-Fredette, David W. Stinson Jan 2007

What Is Mathematics?: Teachers Exploring The Philosophy Of Mathematics, Kimberly White-Fredette, David W. Stinson

Middle-Secondary Education and Instructional Technology Faculty Publications

No abstract provided.

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Analysis Of Mitochondrial Dna Coding Region Snps By Pyrosequencing, Kyle Robert Carl Parker Jan 2007

Analysis Of Mitochondrial Dna Coding Region Snps By Pyrosequencing, Kyle Robert Carl Parker

Electronic Theses and Dissertations

To date, the use of mitochondrial DNA in forensic analysis has relied on the presence of variations in the control region to differentiate between samples. One problem that this analysis has shown is the occurrence of common Haplogroup H haplotypes or identical sequences. Thus, there is a need to enhance the distinguishing power of this type of analysis. One option has been to investigate the mitochondrial coding region for polymorphisms that could differentiate between samples with identical control region haplotypes. The goal of this study has been to identify polymorphic coding region sites for development in a Pyrosequencing assay that …

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