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Articles 31 - 60 of 89
Full-Text Articles in Social and Behavioral Sciences
Shipborne Solar Absorption Measurements Of Co2, Ch4, N2o And Co And Comparison With Sciamachy Wfm-Doas Retrievals, T Warneke, R De Beek, M Buchwitz, J Notholt, A Schulz, Voltaire A. Velazco, O Schrems
Shipborne Solar Absorption Measurements Of Co2, Ch4, N2o And Co And Comparison With Sciamachy Wfm-Doas Retrievals, T Warneke, R De Beek, M Buchwitz, J Notholt, A Schulz, Voltaire A. Velazco, O Schrems
Faculty of Science - Papers (Archive)
CO, CH4, N2O and CO2 were retrieved from high resolution solar absorption spectra obtained during a ship cruise from Capetown to Bremerhaven in January/February 2003 by Fourier Transform Infrared (FTIR) spectroscopy. Precisions of better than 0.5% for the column averaged volume mixing ratios (VMR) of CH4 and CO2 are achieved using of O2 as a reference gas. Shipborne FTIR-measurements of CO and data from SCIAMACHY/ENVISAT retrieved by the Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS) retrieval algorithm show qualitatively the same latitudinal variations. WFMDOAS data of CH4, N2O and CO2 measured over sea exhibit a great spread. The spread …
Structure Of The Early Palaeozoic Cape River Metamorphics, Tasmanides Of North Queensland: Evaluation Of The Roles Of Convergent And Extensional Tectonics, Christopher L. Fergusson, R A Henderson, K. J. Lewthwaite, D. Phillips, I. W. Withnall
Structure Of The Early Palaeozoic Cape River Metamorphics, Tasmanides Of North Queensland: Evaluation Of The Roles Of Convergent And Extensional Tectonics, Christopher L. Fergusson, R A Henderson, K. J. Lewthwaite, D. Phillips, I. W. Withnall
Faculty of Science - Papers (Archive)
The Early Palaeozoic Cape River Metamorphics consist mainly of psammitic gneiss and schist and occur as an extensive linear belt at the western margin of the Charters Towers Province 200 km southwest of Townsville in the northern Tasmanides. A prominent foliation (S2) is the main structure in the belt and is associated with tight to isoclinal folds, subparallel mineral and intersection lineations, and boudinaged pods of vein quartz and pegmatite. In the southwest, the main foliation is a crenulation cleavage (S2) related to D2 deformation. It overprints steeply dipping foliation (S1) formed in …
Pre-Mining Pattern Of Soils On Nauru, Central Pacific, Robert John Morrison, Harley I. Manner
Pre-Mining Pattern Of Soils On Nauru, Central Pacific, Robert John Morrison, Harley I. Manner
Faculty of Science - Papers (Archive)
The environment of Nauru, a raised atoll located in the central Pacific Ocean (0° 32′ S, 166° 56′ W), was devastated by mining of phosphate “rock” during the twentieth century. Some 100 million tonnes of phosphate material has been removed, leaving more than 80% of the island as a dolomite pinnacle–dominated karrenfeld. Based on fieldwork examining sites unmined at that time, laboratory studies on undisturbed profiles, aerial photographs, and old mining maps, a picture of what the soil pattern on Nauru was before mining has been developed. Four major soil associations were identified: the coastal fringe carbonate dominated soils set …
The Illawarra Beaches 1900-1945: A Place To Become Bronzed, Christine Metusela
The Illawarra Beaches 1900-1945: A Place To Become Bronzed, Christine Metusela
Faculty of Science - Papers (Archive)
It was not until the early 1900s that the Australian beach first emerged as a western recreational space. Swimming (known as surf bathing) became a legalised practice, surf lifesaving became institutionalised and activities such as surfing were introduced; all things that make up an important part of Australian culture today. This article examines the emergence of the surf lifesaving movement in the lllawarra between 1900 and 1945. By analysing surf club records the beach space can be seen as a place that has been 'made' and socially constructed. The surf lifesaving discourse brings insights into the beach making processes and …
Synthesis, Modeling, And Characterization Of Conducting Polymers, Geoffrey M. Spinks, Lianbin Zhao, Weihua Li, Yanzhe Wu, Dezhi Zhou, Gordon G. Wallace
Synthesis, Modeling, And Characterization Of Conducting Polymers, Geoffrey M. Spinks, Lianbin Zhao, Weihua Li, Yanzhe Wu, Dezhi Zhou, Gordon G. Wallace
Faculty of Science - Papers (Archive)
This paper presents synthesis and characterization of polypyrrole based conducting polymers in terms of electronic and mechanical disciplines. Using the electrochemical polymerization approach, conducting polymer samples with different dimensions (length, width, and thickness) was fabricated. For each sample, both sinusoidal and step excitations were used to study its mechanical and electrical properties. An equivalent electric circuit based on constant phase element (CPE) is proposed to model such responses. Electrochemical impedance spectroscopy (EIS) method was used to identify the relationship between the dimensions of conducting polymers and model elements parameters.
Combining Structure-Based Drug Design And Pharmacophores, Renate Griffith, T. T. T. Luu, James A. Garner, Paul A. Keller
Combining Structure-Based Drug Design And Pharmacophores, Renate Griffith, T. T. T. Luu, James A. Garner, Paul A. Keller
Faculty of Science - Papers (Archive)
Development towards integrated computer-aided drug design methodologies is presented by utilising crystal structure complexes to produce structure-based pharmacophores. These novel pharmacophores represent the ligand features that are involved in interactions with the target protein, as well as the space around the ligand occupied by the protein. The protein-ligand complexes can also yield information about all interactions that ligands could potentially form with the binding site, as well as about the size of the binding cavity. Together, these describe a 'superligand', which can also be viewed as a pharmacophore. Various types of novel pharmacophores are discussed and compared, using HIV-1 Reverse …
A Convenient And Efficient Synthesis Of (S)-Lysine And (S)-Arginine Homologues Via Olefin Cross-Metathesis, Timothy P. Boyle, John B. Bremner, Jonathan A. Coates, Paul A. Keller, Stephen G. Pyne
A Convenient And Efficient Synthesis Of (S)-Lysine And (S)-Arginine Homologues Via Olefin Cross-Metathesis, Timothy P. Boyle, John B. Bremner, Jonathan A. Coates, Paul A. Keller, Stephen G. Pyne
Faculty of Science - Papers (Archive)
A convenient five step synthesis of (S)-homolysine, incorporating a key olefin cross-metathesis step in the chain extension methodology, has been developed, together with a six step related synthesis of a new homologue of arginine, (S)-bishomoarginine.
Toxicity, Biotransformation, And Mode Of Action Of Arsenic In Two Freshwater Microalgae (Chlorella Sp. And Monoraphidium Arcuatum), Jacqueline L. Levy, Jennifer L. Stauber, Merrin S. Adams, William A. Maher, Jason K. Kirby, Dianne F. Jolley
Toxicity, Biotransformation, And Mode Of Action Of Arsenic In Two Freshwater Microalgae (Chlorella Sp. And Monoraphidium Arcuatum), Jacqueline L. Levy, Jennifer L. Stauber, Merrin S. Adams, William A. Maher, Jason K. Kirby, Dianne F. Jolley
Faculty of Science - Papers (Archive)
The toxicity of As(V) and As(III) to two axenic tropical 15 freshwater microalgae, Chlorella sp. and Monoraphidium arcuatum, was determined using 72-h growth rate inhibition bioassays. Both organisms were tolerant to As(III) (72-h IC50, concentration to cause 50% inhibition of growth, of 25 and 15 mg As(III)/L, respectively). Chlorella sp. was also tolerant to As(V) with no effect on growth rate over 72 h at concentrations up to 0.8 mg/L (72-h IC50 of 25 mg As(V)/L). M. arcuatum was more sensitive to As(V) (72-h IC50 of 0.25 mg As(V)/L). An increase in phosphate in the growth medium (0.15 to 1.5 …
Doing Discourse Analysis, Gordon R. Waitt
Doing Discourse Analysis, Gordon R. Waitt
Faculty of Science - Papers (Archive)
My hope in writing this chapter is to generate enthusiasm for geographical research employing discourse analysis. My intention is to provide some advice on doing discourse analysis to facilitale the design of research. I first outline why some geographers have been inspired by this approach. I suggest how Foucauldian discourse analysis is a break from other critical methods applied to textual analysis, including content analysis, semiology, and iconography. The theoretical underpinnings of the method provided by Michel Foucault, a French poststructuralist philosopher, is a key source of difference. I therefore condense Michel Foucault's contribution to discourse analysis by sketching out …
Walking With Hobbits: An Insider's View Of The Discovery At Liang Bua, Kira E. Westaway
Walking With Hobbits: An Insider's View Of The Discovery At Liang Bua, Kira E. Westaway
Faculty of Science - Papers (Archive)
Startling archaeological and palaeoanthropological discoveries tend to generate a wealth of responses from different social and professional groups. The recent discovery of a 'hobbit' generated a response from academic institutions, the media and the general public that was unexpected, but at the same time very indicative of how human beings perceive themselves. By reviewing how this find has impacted on these three groups, a mixture of emotions is revealed: disbelief, horror, intrigue and fascination. But can science, especially science in Indonesia, benefit from this period of intense scrutiny and interest brought about by the most important, albeit disputed, find of …
New Pieces To The Archaean Terrane Jigsaw Puzzle In The Nuuk Region, Southern West Greeland: Steps In Transforming A Simple Insight Into A Complex Regional Tectonothermal Model, Clark R L Friend, Allen Phillip Nutman
New Pieces To The Archaean Terrane Jigsaw Puzzle In The Nuuk Region, Southern West Greeland: Steps In Transforming A Simple Insight Into A Complex Regional Tectonothermal Model, Clark R L Friend, Allen Phillip Nutman
Faculty of Science - Papers (Archive)
In the south of the Nuuk region of West Greenland our 1980s mapping recognized four Archaean gneiss terranes (Færingehavn, Tre Brødre, Tasiusarsuaq and Akia terranes) with different protolith ages and separate early tectonothermal histories. Later in the Archaean these were juxtaposed and then experienced the same 2700-2500 Ma tectonothermal events. Here we abandon extrapolation of only these four terranes across the whole region, and distinguish two new terranes in the NE. The northernmost Isukasia terrane (previously regarded as the northernmost exposure of the Færingehavn terrane) consists of Palaeoarchaean rocks (>3600 Ma) tectonically bounded on its south by the 3075-2960 …
Complex 3670-3500 Ma Orogenic Episodes Superimposed On Juvenile Crust Accreted Between 3850 And 3690 Ma, Itsaq Gneiss Complex, Southern West Greenland, Clark R L Friend, Allen Phillip Nutman
Complex 3670-3500 Ma Orogenic Episodes Superimposed On Juvenile Crust Accreted Between 3850 And 3690 Ma, Itsaq Gneiss Complex, Southern West Greenland, Clark R L Friend, Allen Phillip Nutman
Faculty of Science - Papers (Archive)
The Itsaq Gneiss Complex of the Nuuk region, southern West Greenland, is dominated by 3850-3690 Ma tonalites intruded into and intercalated with lesser amounts of different ≥3850-3700 Ma supracrustal units. Published wholerock Sr and Nd isotopic studies demonstrate that the tonalites are juvenile crustal additions from a depleted mantle source. From our field studies and SHRIMP U/Pb zircon dating, we argue that this juvenile crustal accretion was spread over ca. 170 m.yr. (≥3850-3690 Ma). Following 3850-3690 Ma juvenile crustal accretion events, the evolution of the Itsaq Gneiss Complex continued with numerous crustal-reworking events between 3670 and 3500 Ma. Examples of …
Metasedimentary Complexes Of The Tuva-Mongolian Massif: Age, Provenances And Tectonic Position, I K Kozakov, E B Sal'nikova, Allen Phillip Nutman, V P Kovach, A B Kotov, V N Podkovyrov, Yu V Plotkina
Metasedimentary Complexes Of The Tuva-Mongolian Massif: Age, Provenances And Tectonic Position, I K Kozakov, E B Sal'nikova, Allen Phillip Nutman, V P Kovach, A B Kotov, V N Podkovyrov, Yu V Plotkina
Faculty of Science - Papers (Archive)
A complex problem of dating supracrustal rocks is unavoidable by analysis of tectonic position of polymetamorphic amphibolite and granulite complexes. Geochronological dates are necessary to constrain ages of source rocks and accumulation periods of clastic sediments, while isotopic-geochemical parameters open a possibility to estimate model ages of the crust in provenances. Using the ion microprobe SHRIMPTM (Hiroshima, Japan), clastic zircons from metasediments of the Erzin and Moren complexes of the Tuva-Mongolian massif in accretionary collage of Central Asia are dated and the Nd model age of respective rocks are estimated. The U-Th-Pb isotopic data suggest that clastic zircons from supracrustal …
Rnai-Mediated Knocking-Down Of Rlpk2 Gene Retarded Soybean Leaf Senescence, Xiaoping Li, Yuanyuan Ma, Pengli Li, Liwen Zhang, Yong Wang, Ren Zhang, Ningning Wang
Rnai-Mediated Knocking-Down Of Rlpk2 Gene Retarded Soybean Leaf Senescence, Xiaoping Li, Yuanyuan Ma, Pengli Li, Liwen Zhang, Yong Wang, Ren Zhang, Ningning Wang
Faculty of Science - Papers (Archive)
Leaf senescence that occurs in the last stage of leaf development is a genetically programmed process. It is very significant to elucidate the molecular mechanisms that control the initiation and progression of leaf senescence and the way the senescence signal is transduced. In a previous study on artificially induced soybean leaf senescence, we cloned a novel gene designatedrlpk2 (Genbank Accession No. AY687391) that encodes a leucine-rich repeat (LRR) receptor like protein kinase. The expression level ofrlpk2 gene was shown to be strongly up-regulated during both the natural leaf senescence process in this report and the artificially induced primary-leaf-senescence …
Macrochannels And Their Significance For Flood-Risk Minimisation, West Dapto, New South Wales, E. L. Roper, Ivars Reinfelds, Gerald C. Nanson
Macrochannels And Their Significance For Flood-Risk Minimisation, West Dapto, New South Wales, E. L. Roper, Ivars Reinfelds, Gerald C. Nanson
Faculty of Science - Papers (Archive)
A prominent characteristic of streams draining catchments in West Dapto, New South Wales, are well developed macrochannels that have formed within alluvial terraces in mid-catchment zones. A detailed hydraulic modelling study using HEC-RAS, HEC-GeoRAS and Arcview GIS indicates that these macrochannels are scaled to accommodate high magnitude floods. They offer a significant degree of natural protection from flood events up to and in excess of 100 years recurrence interval, essentially by operating as 'bankfull' channels during such events. Macrochannel landforms can be clearly distinguished and mapped on fine-scale digital elevation models (DEMs) and other GIS data sources such as rectified …
A Survey Of Martian Dust Devil Activity Using Mars Global Surveyor Mars Orbiter Camera Images, Jenny A. Fisher, Mark I. Richardson, Claire E. Newman, Mark A. Szwast, Chelsea Graf, Shabari Basu, Shawn P. Ewald, Anthony D. Toigo, R. John Wilson
A Survey Of Martian Dust Devil Activity Using Mars Global Surveyor Mars Orbiter Camera Images, Jenny A. Fisher, Mark I. Richardson, Claire E. Newman, Mark A. Szwast, Chelsea Graf, Shabari Basu, Shawn P. Ewald, Anthony D. Toigo, R. John Wilson
Faculty of Science - Papers (Archive)
A survey of dust devils using the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide- and narrow-angle (WA and NA) images has been undertaken. The survey comprises two parts: (1) sampling of nine broad regions from September 1997 to July 2001 and (2) a focused seasonal monitoring of variability in the Amazonis region, an active dust devil site, from March 2001 to April 2004. For part 1, dust devils were identified in NA and WA images, and dust devil tracks were identified in NA images. Great spatial variability in dust devil occurrence is highlighted, with Amazonis Planitia being the …
Rotational Effects In The Band Oscillator Strengths And Predissociation Linewidths For The Lowest 1pi U X 1sigma + G Transitions Of N2, V. E. Haverd, B.R. Lewis, S.T. Gibson, G. Stark
Rotational Effects In The Band Oscillator Strengths And Predissociation Linewidths For The Lowest 1pi U X 1sigma + G Transitions Of N2, V. E. Haverd, B.R. Lewis, S.T. Gibson, G. Stark
Faculty of Science - Papers (Archive)
A coupled-channel Schrödinger equation (CSE) model of photodissociation, which includes the effects of all interactions between the , , and and the and states, is employed to study the effects of rotation on the lowest- band oscillator strengths and predissociationlinewidths. Significant rotational dependences are found which are in excellent agreement with recent experimental results, where comparisons are possible. New extreme-ultraviolet (EUV)photoabsorption spectra of the key transition of are also presented and analyzed, revealing apredissociationlinewidth peaking near . This behavior can be reproduced only if the triplet structure of the state is included explicitly in the CSE-model calculations, with a spin-orbit …
High Spectral Resolution Solar Absorption Measurements Of Ethylene (C2h4) In A Forest Fire Smoke Plume Using Hitran Parameters: Troposheric Vertical Profile Retrieval, Curtis P. Rinsland, Clare Paton-Walsh, Nicholas B. Jones, David W. T Griffith, Aaron Goldman, Stephen W. Wood, Linda Chiou, Arndt Meier
High Spectral Resolution Solar Absorption Measurements Of Ethylene (C2h4) In A Forest Fire Smoke Plume Using Hitran Parameters: Troposheric Vertical Profile Retrieval, Curtis P. Rinsland, Clare Paton-Walsh, Nicholas B. Jones, David W. T Griffith, Aaron Goldman, Stephen W. Wood, Linda Chiou, Arndt Meier
Faculty of Science - Papers (Archive)
The tropospheric mixing ratio profile of ethylene (C2H4)(C2H4) has been retrieved from a high spectral resolution ground-based infrared solar absorption spectrum. The spectrum was recorded during intense fires in New South Wales, Australia on January 1, 2002, and was analyzed with the C2H4C2H4 spectral parameters added to the 2000 HITRAN compilation. Absorption by C2H4C2H4 in the smoke-affected spectrum extends over a broad spectral range in a region with observable rotational fine structure. The fine structure occurs in addition to the View the MathML source949.5cm-1ν7ν7 band Q branch that is traditionally used to quantify C2H4C2H4 amounts from infrared atmospheric measurements assuming …
Comparisons Between Sciamachy And Ground-Based Ftir Data For Total Columns Of Co, Ch4, Co2 And N2o, B Dils, M De Maziere, T Blumenstock, M Buchwitz, R De Beek, Nicholas B. Jones, David W. Griffith, P Demoulin, A G Frankenberg, H Duchatelet, Hans Fast
Comparisons Between Sciamachy And Ground-Based Ftir Data For Total Columns Of Co, Ch4, Co2 And N2o, B Dils, M De Maziere, T Blumenstock, M Buchwitz, R De Beek, Nicholas B. Jones, David W. Griffith, P Demoulin, A G Frankenberg, H Duchatelet, Hans Fast
Faculty of Science - Papers (Archive)
Total column amounts of CO, CH4, CO2 and N2O retrieved from SCIAMACHY nadir observations in its near-infrared channels have been compared to data from a ground-based quasi-global network of Fourier-transform infrared (FTIR) spectrometers. The SCIAMACHY data considered 5 here have been produced by three different retrieval algorithms, WFM-DOAS (version 0.4, 0.41 for CH4), IMAP-DOAS (version 0.9) and IMLM (version 5.5) and cover the January to December 2003 time period. Comparisons have been made for individual data, as well as for monthly averages. To maximize the number of reliable coincidences that satisfy the temporal and spatial collocation criteria, the 10 SCIAMACHY …
Localized Storms, Edward A. Bryant
Localized Storms, Edward A. Bryant
Faculty of Science - Papers (Archive)
The previous chapter was mainly concerned with the effects of strong winds generated by secondary features of general air circulation. These winds were associated with the development of low-pressure cells spanning areas of 10,000–100,000 km−2. While tropical cyclones and extra-tropical depressions produce some of the strongest winds and highest amounts of precipitation over the widest areas, they are by no means the only source of high winds or heavy precipitation. These values can be matched by thunderstorms, which cover no more than 500 km2 in area and rarely travel more than 100–200 km before dissipating. They can produce high-magnitude, short-period …
An Automated Gis Method For Modeling Relative Wave Exposure Within Complex Reef-Island Systems: A Case Study Of The Great Barrier Reef, Marjetta L. Puotinen
An Automated Gis Method For Modeling Relative Wave Exposure Within Complex Reef-Island Systems: A Case Study Of The Great Barrier Reef, Marjetta L. Puotinen
Faculty of Science - Papers (Archive)
Patterns of wave energy play a significant role in shaping the long-term structure of coral reef communities worldwide. For example, sections of reefs have been shown to vary greatly in morphology (dominant size class, growth form) as coral colonies adapt in response to local-scale differences in the wave heights typically experienced. These differences result in zonation (crest, lagoon, and slope), producing characteristic growth forms and species assemblages that vary in their vulnerability to damage from waves (Done 1993). Those communities experiencing the greatest typical wave energy align themselves parallel to the water flow, adopt stream-lined forms and are usually smaller …
Potential Application Of Solid Electrolyte P11oh In Ni/Mh Batteries, C.Y Wang, J. Sun, Hua-Kun Liu, S. X. Dou, D. Macfarlace, M. Forsyth
Potential Application Of Solid Electrolyte P11oh In Ni/Mh Batteries, C.Y Wang, J. Sun, Hua-Kun Liu, S. X. Dou, D. Macfarlace, M. Forsyth
Faculty of Science - Papers (Archive)
No abstract provided.
Channel Pattern And Deltaic-Estuarine Process In The Indo-Pacific Region, Colin D. Woodroffe
Channel Pattern And Deltaic-Estuarine Process In The Indo-Pacific Region, Colin D. Woodroffe
Faculty of Science - Papers (Archive)
This paper explores the concept that deltaic-estuarine geomorphology is a function of the dominant processes. It has been traditional to recognize river, wave and tidal processes as the principal controls on the gross morphology of deltas. To a lesser extent, these processes are also recognized as significant controls on the shape of estuaries. The complex deltas of the Southeast Asian region contain active deltaic plains and often extensive abandoned deltaic plains which preserve an imprint of the processes which have shaped them. In northern Australia, where estuaries are more extensive than deltas, similar geomorphological features can be recognized and the …
Illuminating Southeast Asian Prehistory : New Archaeological And Paleoanthropological Frontiers For Luminescence Dating, Richard G. Roberts, Michael J. Morwood, Kira E. Westaway
Illuminating Southeast Asian Prehistory : New Archaeological And Paleoanthropological Frontiers For Luminescence Dating, Richard G. Roberts, Michael J. Morwood, Kira E. Westaway
Faculty of Science - Papers (Archive)
Since the explorations of Alfred Russel Wallace and Eugène Dubois in the nineteenth century, Southeast Asia has been one of the world's focal points for studies of biogeography and biodiversity, human evolution and dispersal, environmental change, and the spread of culture, farming, and language. Yet despite its prominence, reliable chronologies are not available for many of the critical archaeological, evolutionary, and environmental turning points that have taken place in the region during the last 1.5 million years. In this paper, we discuss some of these chronological problems and describe how luminescence dating may help overcome them. "Luminescence dating" is a …
Photoelectrochemical Cells Based On Inherently Conducting Polymers, Gordon G. Wallace, Chee O. Too, David L. Officer, Paul C Dastoor
Photoelectrochemical Cells Based On Inherently Conducting Polymers, Gordon G. Wallace, Chee O. Too, David L. Officer, Paul C Dastoor
Faculty of Science - Papers (Archive)
This review of photoelectrochemical cells (PECs) based on inherently conducting polymers (ICPs) deals with the mechanisms of operation and the various factors that influence the overall efficiency of PECs. The factors addressed include ICP composition and oxidation state, the use of nanostructured surfaces and interfaces, and the PEC electrolyte and redox mediator.
Fractionation Of Sedimentary Arsenic From Port Kembla Harbour, Nsw, Australia, Glennys A. O'Brien, William E. Price, Bryan E. Chenhall, Muhammad Damris
Fractionation Of Sedimentary Arsenic From Port Kembla Harbour, Nsw, Australia, Glennys A. O'Brien, William E. Price, Bryan E. Chenhall, Muhammad Damris
Faculty of Science - Papers (Archive)
The binding of arsenic in sediments of the heavily industrialised Port Kembla Harbour, NSW, Australia, has been investigated. Both dredge and core samples have been used to develop a sieving/sequential extraction (SE) procedure. Dredge samples included oxic surficial and deeper anoxic sediment. The main core sample analysed was 18 cm deep, sliced at 2 cm intervals. Sediment was sieved to three size ranges (250 microm) and each of these was then subjected to a four step SE, sequentially solubilizing arsenic as ion exchangeable, 1 M HCl soluble, NH(2)OH.HCl soluble, and strong oxidising acid soluble. Concentrations of 50-500 mg As kg(-1) …
Autopolymerization Of Pyrrole In The Presence Of A Host/Guest Calixarene, David A. Reece, Jennifer M. Pringle, Stephen F. Ralph, Gordon G. Wallace
Autopolymerization Of Pyrrole In The Presence Of A Host/Guest Calixarene, David A. Reece, Jennifer M. Pringle, Stephen F. Ralph, Gordon G. Wallace
Faculty of Science - Papers (Archive)
Aqueous solutions containing pyrrole and calix-6-arenehexasulfonic acid were found to undergo polymerization in the absence of either a chemical oxidant or electrochemical oxidation. The product was an unstable colloidal suspension consisting of spherical polypyrrole particles measuring ≥500 nm in diameter. Conductivity measurements showed the material to be insulating, while cyclic voltammetry studies demonstrated that it was electroactive. Infrared spectroscopy and microanalysis confirmed that the polypyrrole produced was doped with calix-6-arenehexasulfonic acid. When the reaction was repeated using solutions containing stabilizing agents, stable colloidal dispersions were obtained. These were shown by both particle size analysis and transmission electron microscopy to contain …
Environmental Effects Of Ozone Depletion And Its Interactions With Climate Change: Progress Report, 2004, A Andrady, P Aucamp, A Bais, C. Ballare, L Bjorn, J R. Bornman, M Caldwell, T Callaghan, A P. Cullen, D J. Erickson, F R. De Gruijl, D P. Hader, Mohammad Ilyas, G Kulandaivelu, H D. Kumar, J Longstreth, Richard L. Mckenzie, M Norval, H Redhwi, R C. Smith, Keith R. Solomon, B Sulzberger, Y Takizawa, Xiaoyan Tang, A H. Teramura, A Torikai, J C. Van Der Leun, Stephen R. Wilson, R C. Worrest, R. G. Zepp
Environmental Effects Of Ozone Depletion And Its Interactions With Climate Change: Progress Report, 2004, A Andrady, P Aucamp, A Bais, C. Ballare, L Bjorn, J R. Bornman, M Caldwell, T Callaghan, A P. Cullen, D J. Erickson, F R. De Gruijl, D P. Hader, Mohammad Ilyas, G Kulandaivelu, H D. Kumar, J Longstreth, Richard L. Mckenzie, M Norval, H Redhwi, R C. Smith, Keith R. Solomon, B Sulzberger, Y Takizawa, Xiaoyan Tang, A H. Teramura, A Torikai, J C. Van Der Leun, Stephen R. Wilson, R C. Worrest, R. G. Zepp
Faculty of Science - Papers (Archive)
The complexity of the linkages between ozone depletion, UV-B radiation and climate change has become more apparent.
Carbanions: Formation, Structure And Thermochemistry, Stephen J. Blanksby, John H. Bowie
Carbanions: Formation, Structure And Thermochemistry, Stephen J. Blanksby, John H. Bowie
Faculty of Science - Papers (Archive)
This chapter deals with even-electron carbanions: their formation, structure and thermochemical properties in the gas phase. There are a number of excellent reviews already available on the chemistry of carbanions: these discuss in the main, reactivity and anion molecule chemistry.1-4 In this chapter we focus primarily on the formation, structure and thermochemistry of simple hydrocarbon anions while other chapters in this encyclopaedia cover the broader aspects of carbanion chemistry (see Volume 1, “Strained Ring and Highly Basic Carbanions” and this volume, Reactions of Organic Molecules with Organic Ions: “Reactions of Anions with Carbonyl Centres: C–C Bond Forming Reactions”, and Unimolecular …
Does Mate Guarding Prevent Rival Mating In Snow Skinks? A Test Using Aflp, Mats M. Olsson, Beata Ujvari, Erik Wapstra, Thomas R. Madsen, Rick Shine, S. Bensch
Does Mate Guarding Prevent Rival Mating In Snow Skinks? A Test Using Aflp, Mats M. Olsson, Beata Ujvari, Erik Wapstra, Thomas R. Madsen, Rick Shine, S. Bensch
Faculty of Science - Papers (Archive)
We report on likely mixed paternity in a natural population of snow skinks (Niveoscincus mirolepidotus) from alpine Tasmania, Australia. This species is nonterritorial and males guard females after copulation, suggesting that guarding behavior has evolved to prevent rival mating of still-receptive females. To what degree does this mate-guarding prevent rival copulations? We sampled gravid females at random in the wild and looked for within-clutch mixed paternity among their offspring using amplified fragment length polymorphism (AFLP). Incorporating all visualized fragments, offspring band-sharing based on maternal bands was 0.94 (60.05, SD), whereas for paternal fragments it was 0.54 (60.46, SD). We then …