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Full-Text Articles in Physical Sciences and Mathematics
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
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.
Potential Roles Of Abundant Extracellular Chaperones In The Control Of Amyloid Formation And Toxicity, Mark R. Wilson, Justin J. Yerbury, Stephen Poon
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 …
A Fragmentation Study Of Isoflavones In Negative Electrospray Ionization By Msn Ion Trap Mass Spectrometry And Triple Quadrupole Mass Spectrometry, Jinguo Kang, Larry A. Hick, William E. Price
A Fragmentation Study Of Isoflavones In Negative Electrospray Ionization By Msn Ion Trap Mass Spectrometry And Triple Quadrupole Mass Spectrometry, Jinguo Kang, Larry A. Hick, William E. Price
Faculty of Science - Papers (Archive)
This study has elucidated the fragmentation pathway for deprotonated isoflavones in electrospray ionization using MSn ion trap mass spectrometry and triple quadrupole mass spectrometry. Genistein-d4 and daidzein-d3 were used as references for the clarification of fragment structures. To confirm the relationship between precursor and product ions, some fragments were traced from MS2 to MS5. The previous literature for the structurally related flavones and flavanones located the loss of ketene (C2H2O) to ring C, whereas the present fragmentation study for isoflavones has shown that the loss of ketene occurs elsewhere at ring A. In the further fragmentation of the [M-H-CH3]•- radical …
Structural, Metamorphic, And Geochronological Constraints On Alternating Compression And Extension In The Early Paleozoic Gondwanan Pacific Margin, Northeastern Australia, Christopher L. Fergusson, R A Henderson, I. W. Withnall, C M Fanning, D. Phillips, K. J. Lewthwaite
Structural, Metamorphic, And Geochronological Constraints On Alternating Compression And Extension In The Early Paleozoic Gondwanan Pacific Margin, Northeastern Australia, Christopher L. Fergusson, R A Henderson, I. W. Withnall, C M Fanning, D. Phillips, K. J. Lewthwaite
Faculty of Science - Papers (Archive)
The Ross-Delamerian orogenic belt formed along the early Paleozoic active Pacific margin of the newly merged Gondwana supercontinent. In its northern-most segment in the Townsville region of northeastern Australia, we have identified a short contractional phase of the Delamerian orogeny in the Argentine Metamorphics postdating formation of a mafic breccia with a U-Pb zircon age of 500 ± 4 Ma. Contraction was followed by widespread inferred extensional deformation with formation of flat-lying foliation, domal features, and amphibolite grade and greenschist retrograde metamorphism all synchronous with latest Cambrian to Early Ordovician extensional backarc volcanism, sedimentation and intrusions. One of these intrusions …
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
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 …
Smart Nanotextiles: A Review Of Materials And Applications, Gordon G. Wallace, Danilo De Rossi, Yanzhe Wu, King-Tong Lau, Shirley Coyle, Dermot Diamond
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 …
Co Measurements From The Ace-Fts Satellite Instrument: Data Analysis And Validation Using Ground-Based, Airborne And Spaceborne Observations, C Clerbaux, M George, S Turquety, K A. Walker, Nicholas B. Jones, David W. Griffith, C P Rinsland, E Mahieu, M De Maziere, A. Kagawa, J Hannigan, M Coffey, F Hase, M Hopfner, P Duchatelet, I Kramer, A Strandberg, K Strong, Y Kasai, B Barret, P Ricaud, D Murtagh, E Dupuy, V Catoire, C Robert, C Senten, N J. Livesey, M Luo, M Lopez-Puertas, Ph Medelec, A Pazmino, H Pumphrey, T Borsdorff, P F. Coheur, J P. Cammas, James Drummond, R De Zafra, M Deeter, L Emmons, F Eddounia, J C. Gille, E Le Flochmoen, C Boone, B Funke, M Schneider, G P. Stiller, P Bernath, D P. Edwards
Co Measurements From The Ace-Fts Satellite Instrument: Data Analysis And Validation Using Ground-Based, Airborne And Spaceborne Observations, C Clerbaux, M George, S Turquety, K A. Walker, Nicholas B. Jones, David W. Griffith, C P Rinsland, E Mahieu, M De Maziere, A. Kagawa, J Hannigan, M Coffey, F Hase, M Hopfner, P Duchatelet, I Kramer, A Strandberg, K Strong, Y Kasai, B Barret, P Ricaud, D Murtagh, E Dupuy, V Catoire, C Robert, C Senten, N J. Livesey, M Luo, M Lopez-Puertas, Ph Medelec, A Pazmino, H Pumphrey, T Borsdorff, P F. Coheur, J P. Cammas, James Drummond, R De Zafra, M Deeter, L Emmons, F Eddounia, J C. Gille, E Le Flochmoen, C Boone, B Funke, M Schneider, G P. Stiller, P Bernath, D P. Edwards
Faculty of Science - Papers (Archive)
The Atmospheric Chemistry Experiment (ACE) mission was launched in August 2003 to sound the atmosphere by solar occultation. Carbon monoxide (CO), a good tracer of pollution plumes and atmospheric dynamics, is one of the key species provided by the primary instrument, the ACE-Fourier Transform Spectrometer (ACE-FTS). This instrument performs measurements in both the CO 1-0 and 2-0 ro-vibrational bands, from which vertically resolved CO concentration profiles are retrieved, from the mid-troposphere to the thermosphere. This paper presents an updated description of the ACE-FTS version 2.2 CO data product, along with a comprehensive validation of these profiles using available observations (February …
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
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.
Preliminary Investigations Of Pigment Responses To Phylloxera Infestation, A L. Blanchfield, K S. Powell, Sharon A. Robinson
Preliminary Investigations Of Pigment Responses To Phylloxera Infestation, A L. Blanchfield, K S. Powell, Sharon A. Robinson
Faculty of Science - Papers (Archive)
Early detection of grape phylloxera (Daktulosphaira vitifoliae) infestation is vital for the implementation of post-outbreak quarantine in Australia. Remote sensing systems exploit changes in leaf pigment content associated with plant stress and offer a real possibility of a phylloxera-specific detection system. Pre-visual, symptomatic changes in the pigment content of phylloxera-infested grapevine leaves were investigated using high performance liquid chromatography (HPLC) as a potential aid to improve current phylloxera detection methods. A glasshouse trial was established to characterize the response of two grapevine varieties, Vitis vinifera ‘Cabernet Sauvignon’ and ‘Shiraz’, to phylloxera infestation, in a controlled environment. Field trials …
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
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 …
Structural History Of The Greenvale Province, North Queensland: Early Palaeozoic Extension And Convergence On The Pacific Margin Of Gondwana, Christopher L. Fergusson, R A Henderson, I. W. Withnall, C M Fanning
Structural History Of The Greenvale Province, North Queensland: Early Palaeozoic Extension And Convergence On The Pacific Margin Of Gondwana, Christopher L. Fergusson, R A Henderson, I. W. Withnall, C M Fanning
Faculty of Science - Papers (Archive)
The southeastern Georgetown Inlier (Greenvale Province) consists of Early Palaeozoic metamorphic rocks in fault contact along the Lynd Mylonite Zone with the Palaeoproterozoic to Mesoproterozoic craton of northeastern Australia. It has a central assemblage of metamorphosed silicic volcanic and sedimentary rocks considered equivalent to the Late Cambrian to Early Ordovician Seventy Mile Range Group that developed in an extensional backarc in the Charters Towers Province to the southeast. In the western part of the Greenvale Province the Oasis Metamorphics has a U-Pb zircon SHRIMP metamorphic age of 476 ± 5 Ma and is intruded by the granodioritic Lynwater Complex with …
Corticotropin Releasing Hormone - A Gpcr Drug Target, C. Hemley, A. Mccluskey, Paul A. Keller
Corticotropin Releasing Hormone - A Gpcr Drug Target, C. Hemley, A. Mccluskey, Paul A. Keller
Faculty of Science - Papers (Archive)
Corticotrophin Releasing Hormone (CRH) is a primary hormone in the fight or flight response targeting a membrane bound G-protein coupled receptor (GPCR). Many people worldwide stand to benefit by the development of CRH agonists and antagonists for the treatment of anxiety and depression, with additional therapeutic targets including Alzheimer’s, pain and the prevention of premature birth: so why the delay in development? In this review, we will discuss not only CRH, related proteins, receptors and ligands, but some of the obstacles that have arisen, as well as strategies being pursued to overcome these problems in the pursuit of this GPCR …
Air-Drying Of Banana: Influence Of Experimental Parameters, Slab Thickness, Banana Maturity And Harvesting Season, Minh-Hue Nguyen, William E. Price
Air-Drying Of Banana: Influence Of Experimental Parameters, Slab Thickness, Banana Maturity And Harvesting Season, Minh-Hue Nguyen, William E. Price
Faculty of Science - Papers (Archive)
Air-drying of banana slabs has been investigated and the influence of experimental parameters such as temperature, relative humidity and slab thickness has been studied. This was in part re-investigated because of inconsistencies in previous studies, particularly in relation to derived water diffusion coefficients. In addition, it is shown that harvest season and hence initial moisture content has a very marked influence on the drying kinetics. By contrast banana maturity (ripeness) has little influence on the kinetics despite there being significant differences in morphology and chemical composition between green and ripe bananas. The effect of these two variables on the drying …
Backyard:Nature And Culture In Suburban Australia, Lesley M. Head, Pat Muir
Backyard:Nature And Culture In Suburban Australia, Lesley M. Head, Pat Muir
Faculty of Science - Papers (Archive)
No abstract provided.
Using Calibration Approaches To Compensate For Remaining Matrix Effects In Quantitative Liquid Chromatography Electrospray Ionization Multistage Mass Spectrometric Analysis Of Phytoestrogens In Aqueous Environmental Samples, Jinguo Kang, Larry A. Hick, William E. Price
Using Calibration Approaches To Compensate For Remaining Matrix Effects In Quantitative Liquid Chromatography Electrospray Ionization Multistage Mass Spectrometric Analysis Of Phytoestrogens In Aqueous Environmental Samples, Jinguo Kang, Larry A. Hick, William E. Price
Faculty of Science - Papers (Archive)
Signal suppression is a common problem in quantitative LC-ESI-MSn analysis in environment samples, especially in highly loaded wastewater samples with highly complex matrix. Optimization of sample preparation and improvement of chromatographic separation are prerequisite to improve reproducibility and selectivity. Matrix components may be reduced if not eliminated by a series of sample preparation steps. However, extensive sample preparation can be time-consuming and risk the significant loss of some trace analytes. The best way to further compensate matrix effects is the use of internal standard for each analyte. However, in a multi-component analysis, finding appropriate internal standards for every analyte is …
The Unstructured C-Terminus Of The Tau Subunit Of Escherichia Coli Dna Polymerase Iii Holoenzyme Is The Site Of Interaction With The Alpha Subunit, Slobodan Jergic, Kiyoshi Ozawa, Neal K. Williams, Xun-Cheng Su, Daniel D. Scott, Samir M. Hamdan, Jeffrey A. Crowther, Gottfried Otting, Nicholas E. Dixon
The Unstructured C-Terminus Of The Tau Subunit Of Escherichia Coli Dna Polymerase Iii Holoenzyme Is The Site Of Interaction With The Alpha Subunit, Slobodan Jergic, Kiyoshi Ozawa, Neal K. Williams, Xun-Cheng Su, Daniel D. Scott, Samir M. Hamdan, Jeffrey A. Crowther, Gottfried Otting, Nicholas E. Dixon
Faculty of Science - Papers (Archive)
The τ subunit of Escherichia coli DNA polymerase III holoenzyme interacts with the α subunit through its C-terminal Domain V, τC16. We show that the extreme C-terminal region of τC16 constitutes the site of interaction with α. The τC16 domain, but not a derivative of it with a C-terminal deletion of seven residues (τC16Δ7), forms an isolable complex with α. Surface plasmon resonance measurements were used to determine the dissociation constant (KD) of the α−τC16 complex to be ∼260 pM. Competition with immobilized τC16 by …
Detrital Zircon Ages In Neoproterozoic To Ordovician Siliciclastic Rocks, Northeastern Australia: Implications For The Tectonic History Of The East Gondwana Continental Margin, Christopher L. Fergusson, Robert A. Henderson, C Mark Fanning, Ian W. Withnall
Detrital Zircon Ages In Neoproterozoic To Ordovician Siliciclastic Rocks, Northeastern Australia: Implications For The Tectonic History Of The East Gondwana Continental Margin, Christopher L. Fergusson, Robert A. Henderson, C Mark Fanning, Ian W. Withnall
Faculty of Science - Papers (Archive)
U–Pb detrital zircon ages in variably metamorphosed, dominantly fine-grained clastic successions are used in northeastern Australia to identify two major successions along the East Gondwana margin. The older succession is of probable Late Neoproterozoic age and is considered part of a passive margin associated with rifting at c. 600 Ma. Most detrital zircons have ages in the range 1000–1300 Ma and were probably derived from an extension of a Late Mesoproterozoic (1050–1200 Ma) orogenic belt from the central Australian Musgrave Complex located 1500 km to the west. No evidence has been found for 600–800 Ma rifting of a Rodinian supercontinent …
Reductive Ring Opening Reactions Of Diphenyldihydrofullerenylpyrroles, William Hawkins, Paul A. Keller, Stephen G. Pyne
Reductive Ring Opening Reactions Of Diphenyldihydrofullerenylpyrroles, William Hawkins, Paul A. Keller, Stephen G. Pyne
Faculty of Science - Papers (Archive)
The reductive ring opening reaction conditions for the simple [60]fullerenyldihydropyrrole 1 have been optimized to include acetic acid in the reaction mixture to rapidly protonate the anionic intermediate. Under these conditions, the ring opened dihydrofullerene 2 was obtained in 68% yield. Under slightly modified conditions and at −78 °C, the reductive bis-ring opening of the tethered trans-4 isomer 3 provided the novel racemic bis-dihydrofullerenyl derivative 7.
The Importance Of Slime: Does Living In A Community Matrix Save Algal Cells From The Toxic Effects Of Copper?, Jacqueline Levy, Dianne F. Jolley, Jenny L. Stauber
The Importance Of Slime: Does Living In A Community Matrix Save Algal Cells From The Toxic Effects Of Copper?, Jacqueline Levy, Dianne F. Jolley, Jenny L. Stauber
Faculty of Science - Papers (Archive)
Microscopic algae are often used to assess the toxic effects of chemicals to the environment. They are good indicators of ecosystem health because they form the basis of the aquatic food chain and many algal species are sensitive to metals, like copper, at concentrations which occur naturally in the environment. Most toxicity tests with algae use planktonic species, that is, alga that live in the water as free-living species. To date, little research has been done on the toxicity of metals to attached algal species living in a community matrix known as biofilms, because of the difficulties in quantifying changes …
Characteristics And Error Estimation Of Stratospheric Ozone And Ozone-Related Species Over Poker Flat (65°N, 147°W), Alaska Observed By A Ground-Based Ftir Spectrometer From 2001-2003, A. Kagawa, Y. Kasai, Nicholas Jones, M. Yamamori, K. Seki, F. Murcray, Y. Murayama, K. Mizutani, T. Itabe
Characteristics And Error Estimation Of Stratospheric Ozone And Ozone-Related Species Over Poker Flat (65°N, 147°W), Alaska Observed By A Ground-Based Ftir Spectrometer From 2001-2003, A. Kagawa, Y. Kasai, Nicholas Jones, M. Yamamori, K. Seki, F. Murcray, Y. Murayama, K. Mizutani, T. Itabe
Faculty of Science - Papers (Archive)
It is important to obtain the year-to-year trend of stratospheric minor species in the context of global changes. An important example is the trend in global ozone depletion. The purpose of this paper is to report the accuracy and precision of measurements of stratospheric chemical species that are made at our Poker Flat site in Alaska (65◦ N, 147◦ W). Since 1999, minor atmospheric molecules have been observed using a Fourier-Transform solar-absorption infrared Spectrometer (FTS) at Poker Flat. Vertical profiles of the abundances of ozone, HNO3, HCl, and HF for the period from 2001 to 2003 were retrieved from FTS …
Mechanochemical Coupling In The Myosin Motor Domain. I. Insights From Equilibrium Active-Site Simulations, Haibo Yu, Liang Ma, Yang Yang, Qiang Cui
Mechanochemical Coupling In The Myosin Motor Domain. I. Insights From Equilibrium Active-Site Simulations, Haibo Yu, Liang Ma, Yang Yang, Qiang Cui
Faculty of Science - Papers (Archive)
Although the major structural transitions in molecular motors are often argued to couple to the binding of Adenosine triphosphate (ATP), the recovery stroke in the conventional myosin has been shown to be dependent on the hydrolysis of ATP. To obtain a clearer mechanistic picture for such ‘‘mechanochemical coupling’’ in myosin, equilibrium active-site simulations with explicit solvent have been carried out to probe the behavior of the motor domain as functions of the nucleotide chemical state and conformation of the converter/relay helix. In conjunction with previous studies of ATP hydrolysis with different active-site conformations and normal mode analysis of structural flexibility, …
Free Fatty Acids From The Crude Hexane Extract Of The Aerial Parts Of Heliotropium Indicum Linn. Growing In Phitsanulok, Thailand, Theeraphan Machan, Jurgen Korth, Boonsom Liawruangrath, Saisunee Liawruangrath, Apiwat Baramee, Stephen G. Pyne
Free Fatty Acids From The Crude Hexane Extract Of The Aerial Parts Of Heliotropium Indicum Linn. Growing In Phitsanulok, Thailand, Theeraphan Machan, Jurgen Korth, Boonsom Liawruangrath, Saisunee Liawruangrath, Apiwat Baramee, Stephen G. Pyne
Faculty of Science - Papers (Archive)
Sixteen free fatty acids from the crude hexane extract of the aerial parts of Heliotropium indicum Linn. growing in Phitsanulok, Thailand, have been identified after conversion to their methyl esters with boron trifluoride-methanol followed by quantification by GC-FID and identification by GC-MS analysis. They accounted for 95% of the chromatographable components, with 9,12-octadecadienoic acid, (39.7%), 9-octadecenoic acid (32.4%), hexadecanoic acid (14.2%) and octadecanoic acid (5.1%), as the major constituents. A small amount of 6,10,14-trimethyl-2-pentadecanone and 3,7,11,15-tetramethyl-2-hexadecen-1-ol as well as a homologous series of n-alkanes present at trace level and ranging from C25 to C31 was also found …
Sensitivity Of Marine Microalgae To Copper: The Effect Of Biotic Factors On Copper Adsorption And Toxicity, Jacqueline Levy, Jenny L. Stauber, Dianne F. Jolley
Sensitivity Of Marine Microalgae To Copper: The Effect Of Biotic Factors On Copper Adsorption And Toxicity, Jacqueline Levy, Jenny L. Stauber, Dianne F. Jolley
Faculty of Science - Papers (Archive)
Microalgae are sensitive indicators of environmental change and, as the basis of most freshwater and marine ecosystems, are widely used in the assessment of risk and development of environmental regulations for metals. However, interspecies differences in sensitivity to metals are not well understood. The relationship between metal-algal cell binding and copper sensitivity of marine microalgae was investigated using a series of 72-h growth-rate inhibition bioassays and short-term (1-h) uptake studies. A range of marine algae from different taxonomic groups were screened to determine whether copper adsorption to the cell membrane was influenced by biotic factors, such as the ultrastructure of …
Some Approaches To New Antibacterial Agents, John B. Bremner
Some Approaches To New Antibacterial Agents, John B. Bremner
Faculty of Science - Papers (Archive)
Bacteria use a number of resistance mechanisms to counter the antibacterial challenge, and one of these is the expression of transmembrane protein-based efflux pumps which can pump out antibacterials from within the cells, thus lowering the antibacterial concentration to nonlethal levels. For example, in S. aureus, the NorA pump can pump out the antibacterial alkaloid berberine and ciprofloxacin. One general strategy to reduce the health threat of resistant bacteria is to block a major bacterial resistance mechanism at the same time as interfering with another bacterial pathway or target site. New developments of this approach in the context of dual-action …
Flip-Type Disorder In 3-Substituted 2,2':5',2''-Terthiophenes, David L. Officer, Pawel W. Wagner, Maciej Kubicki
Flip-Type Disorder In 3-Substituted 2,2':5',2''-Terthiophenes, David L. Officer, Pawel W. Wagner, Maciej Kubicki
Faculty of Science - Papers (Archive)
In the crystal structures of four thiophene derivs., (E)-3'-[2-(anthracen-9-yl)ethenyl]-2,2':5',2''-terthiophene, C28H18S3, (E)-3'-[2-(1-pyrenyl)ethenyl]-2,2':5',2''-terthiophene, C30H18S3, (E)-3'-[2-(3,4-dimethoxyphenyl)ethenyl]-2,2':5',2''-terthiophene, C22H18O2S3, and (E,E)-1,4-bis[2-(2,2':5',2''-terthiophen-3'-yl)ethenyl]-2,5-dimethoxybenzene, C36H26O2S6, at least one of the terminal thiophene rings is disordered and the disorder is of the flip type. The terthiophene fragments are far from being coplanar, contrary to terthiophene itself. The central C-C=C-C fragments are almost planar but the bond lengths suggest slight delocalization within this fragment.
Annual Variation Of Strato-Mesospheric Carbon Monoxide Measured By Ground-Based Fourier Transform Infrared Spectrometry, Voltaire A. Velazco, S.J. Wood, M Sinnhuber, I Kramer, Nicholas B. Jones, Y Kasai, Justus Notholt, Thorsten Warneke, T Blumenstock, F Hase, F Murcray, O Schrems
Annual Variation Of Strato-Mesospheric Carbon Monoxide Measured By Ground-Based Fourier Transform Infrared Spectrometry, Voltaire A. Velazco, S.J. Wood, M Sinnhuber, I Kramer, Nicholas B. Jones, Y Kasai, Justus Notholt, Thorsten Warneke, T Blumenstock, F Hase, F Murcray, O Schrems
Faculty of Science - Papers (Archive)
We present long-term time-series of strato-mesospheric CO vertical columns measured from stations located in Antarctica, mid-latitudes and the Arctic, covering the period from 19972005. The instrument and the measurement technique allows the separation of tropospheric and strato-mesospheric contributions to the CO column, therefore providing information on the chemistry and dynamics both at low and high altitudes. Data from polar stations show a similar annual variability of strato-mesospheric CO with a strong maximum in late winter and spring. A small enhancement in late summer for some stations, which we call the "summer bulge", can be seen occasionally. Generally, the mid-latitude stations …
Incremental Accretion Of A Sandy Reef Island Over The Past 3000 Years Indicated By Component-Specific Radiocarbon Dating, Colin D. Woodroffe, Bongkoch Samosorn, Q Hua, Deirdre E. Hart
Incremental Accretion Of A Sandy Reef Island Over The Past 3000 Years Indicated By Component-Specific Radiocarbon Dating, Colin D. Woodroffe, Bongkoch Samosorn, Q Hua, Deirdre E. Hart
Faculty of Science - Papers (Archive)
Low-lying reef islands appear particularly threatened by anticipated sea-level rise, and determining how they formed and whether they are continuing to accumulate sediment is essential for their sustainable management. Depositional chronology of Warraber Island, a small sand cay in Torres Strait, Australia, is re-examined based on AMS radiocarbon dating of specific skeletal components. Whereas radiometric dating of bulk sand samples indicated one or more discrete phases of mid-late Holocene deposition, component-specific AMS radiocarbon dating of sand grains indicates sustained incremental growth over the past 3000 years. Ages on gastropods that lived on the reef flat around the island indicate continuing …
Effect Of Overlying Water Ph, Dissolved Oxygen, Salinity And Sediment Disturbances On Metal Release And Sequestration From Metal Contaminated Marine Sediments, Clare Atkinson, Dianne F. Jolley, Stuart L. Simpson
Effect Of Overlying Water Ph, Dissolved Oxygen, Salinity And Sediment Disturbances On Metal Release And Sequestration From Metal Contaminated Marine Sediments, Clare Atkinson, Dianne F. Jolley, Stuart L. Simpson
Faculty of Science - Papers (Archive)
Experiments were undertaken to examine the key variables affecting metal release and sequestration processes in marine sediments with metal concentrations in sediments reaching up to 86, 240, 700, and 3000mgkg1 (dry weight) for Cd, Cu, Pb and Zn, respectively. The metal release and sequestration rates were affected to a much greater extent by changes in overlying water pH (5.58.0) and sediment disturbance (by physical mixing) than by changes in dissolved oxygen concentration (38mgl1) or salinity (1545 practical salinity units). The physical disturbance of sediments was also found to release metals more rapidly than biological disturbance (bioturbation). The rate of oxidative …
Stratomesospheric Co Measured By A Ground-Based Fourier Transform Spectrometer Over Poker Flat, Alaska: Comparisons With Odin/Smr And A 2-D Model, Nicholas B. Jones, Y Kasai, E Dupuy, Y. Murayama, J Urban, B Barret, M Sinnhuber, A. Kagawa, T. Koshiro, P Ricaud, D Murtagh
Stratomesospheric Co Measured By A Ground-Based Fourier Transform Spectrometer Over Poker Flat, Alaska: Comparisons With Odin/Smr And A 2-D Model, Nicholas B. Jones, Y Kasai, E Dupuy, Y. Murayama, J Urban, B Barret, M Sinnhuber, A. Kagawa, T. Koshiro, P Ricaud, D Murtagh
Faculty of Science - Papers (Archive)
The interseasonal variability of stratomesospheric CO is reported from Poker Flat, Alaska, using spectra from a ground-based Fourier Transform Spectrometer (gb-FTS) for the time period from 2000 to 2004. The CO spectra were analyzed using an optimal estimation technique that separates the tropospheric and stratospheric/mesospheric components into partial columns. The distribution of CO in the polar winter is such that the gb-FTS retrieved partial column is weighted to the mesosphere. The gb-FTS data are compared with measurements of partial column CO from the Sub-Millimeter Radiometer on board the Odin satellite and shown to be in very good agreement despite the …
(Z)-2-Phenyl-3-(2,2':5',2''-Terthiophen-3'-Yl)Acrylonitrile, David L. Officer, Pawel W. Wagner, Maciej Kubicki
(Z)-2-Phenyl-3-(2,2':5',2''-Terthiophen-3'-Yl)Acrylonitrile, David L. Officer, Pawel W. Wagner, Maciej Kubicki
Faculty of Science - Papers (Archive)
In the crystal structure of the title compd., C21H13NS3, one of the terminal thiophene rings is disordered in approx. a 3:1 ratio of components, and the disorder is of the flip type. The terthiophene units are far from coplanarity, in contrast to terthiophene itself. The conformation might be described, for the unit of greater occupancy, as quasi-cis [the S-C-C-S torsion angle is 41.1 (5)degrees] quasi-trans [the S-C-C-S torsion angle is -140.1 (4)degrees], and for the less-occupied part as quasi-cis-quasi-cis [35.7 (6)degrees]. The dihedral angle between the terminal ring planes is as high as 71.7 (2)degrees. The central C-C=C-C group is …