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Preliminary Assessment Of The Handline (Banca) Fisheries In The Philippines (Fis/2009/033). Final Report, Ronald J. West, Mary Ann Palma, Noel Barut, Elaine Garvilles, Desiderio Ayanan Jan 2011

Preliminary Assessment Of The Handline (Banca) Fisheries In The Philippines (Fis/2009/033). Final Report, Ronald J. West, Mary Ann Palma, Noel Barut, Elaine Garvilles, Desiderio Ayanan

Faculty of Science - Papers (Archive)

The Philippines, with an Exclusive Economic Zone (EEZ) of 2.2 million sq. km, including over 7,000 islands, relies on fisheries as one of its major industries, sources of employment and in promoting food security. The hand-line fishery using bancas (or pump boats), catching commercially viable species such as tuna, is a major component of both municipal and commercial fisheries in the Philippines. Hand-line fishing is considered one of the most sustainable forms of fishing in the country. However, the economic significance of the hand-line fishery is increasingly threatened by a number of factors, including poor information on the fishery and …


Phytochemical Studies On Stemona Aphylla: Isolation Of A New Stemofoline Alkaloid And Six New Stemofurans, Thanapat Sastraruji, Sukanda Chaiyong, Araya Jatisatienr, Stephen G. Pyne, Alison T. Ung, Wilford Lie Jan 2011

Phytochemical Studies On Stemona Aphylla: Isolation Of A New Stemofoline Alkaloid And Six New Stemofurans, Thanapat Sastraruji, Sukanda Chaiyong, Araya Jatisatienr, Stephen G. Pyne, Alison T. Ung, Wilford Lie

Faculty of Science - Papers (Archive)

A new stemofoline alkaloid, (2′S)-hydroxy-(11S,12R)-dihydrostemofoline (3), new stemofurans M-R (8-13), and known compounds stemofoline (1), (2′S)-hydroxystemofoline (2), stemofuran E (4), stemofuran F (5), stemofuran J (6), and stilbostemin F (7) have been isolated from the root extracts of Stemona aphylla. The structures and relative configurations of these new compounds have been determined by spectroscopic data interpretation and from semisynthetic studies. These natural and semisynthetic alkaloids were tested for acetylcholinesterase inhibitory activities and were found to be 10-20 times less active than 1′,2′-didehydrostemofoline itself. Stemofurans 4, 6, 8, 11, and 13 were tested for their antibacterial and antifungal activities. Three of …


Light Interception And Utilisation, Sharon A. Robinson, J. R. Watling Jan 2011

Light Interception And Utilisation, Sharon A. Robinson, J. R. Watling

Faculty of Science - Papers (Archive)

Initial steps of photosynthesis involve interception and absorption of photons by photosynthetic organs; subsequent steps are involved with utilisation or dissipation of quantum energy so derived. Interception of light varies according to size, angle, orientation and surface features of the photosynthetic organ(s) and is also influenced by changes in the arrangement of photosynthetic tissue within those organs.


Lutein From De-Epoxidation Of Lutein Epoxide Replaces Zeaxanthin To Sustain An Enhanced Capacity For Non-Photochemical Chlorophyll Fluorescence Quenching In Avocado Shade Leaves In The Dark, Britta Forster, Barry James Pogson, Charles Barry Osmond Jan 2011

Lutein From De-Epoxidation Of Lutein Epoxide Replaces Zeaxanthin To Sustain An Enhanced Capacity For Non-Photochemical Chlorophyll Fluorescence Quenching In Avocado Shade Leaves In The Dark, Britta Forster, Barry James Pogson, Charles Barry Osmond

Faculty of Science - Papers (Archive)

Leaves of avocado (Persea americana Mill.) that develop and persist in deep shade canopies have very low rates of photosynthesis but contain high concentrations of lutein epoxide (Lx) that are partially de-epoxidized to lutein (L) after one hour exposure to 120 to 350 μmol photons m-2 s-1 increasing the total L pool by 5-10% (ΔL). De-epoxidation of Lx to L was near stoichiometric and similar in kinetics to de-epoxidation of violaxanthin (V) to antheraxanthin (A) and zeaxanthin (Z). Although the V pool was restored by epoxidation of A and Z overnight, the Lx pool was not. Depending on leaf age …


Is It Easy Being Green? On The Dilemmas Of Material Cultures Of Household Sustainability, Chris Gibson, Gordon R. Waitt, Lesley M. Head, Nicholas J. Gill Jan 2011

Is It Easy Being Green? On The Dilemmas Of Material Cultures Of Household Sustainability, Chris Gibson, Gordon R. Waitt, Lesley M. Head, Nicholas J. Gill

Faculty of Science - Papers (Archive)

In the 1970s ‘greens’ were normally thought of as radicals because of their uncompromising political views about sustainability, non-violence, social justice and grassroots democracy. Sometimes greens were marginalised as ‘tree-huggers’ because of their affinity with the non-human world. Today, in popular discourse, ‘green’ provides the centre of sustainability gravity (Barr 2003). Green has become a definitive reflection of what individuals are to become as both consumers and citizens. It is easy, it is said, to be green. This is evident from product branding to categories used in government survey results to describe the ‘most acceptable’ household practices. But as green …


Is It Easy Being Green? On The Dilemmas Of Material Cultures Of Household Sustainability, Chris Gibson, Gordon R. Waitt, Lesley M. Head, Nick Gill Jan 2011

Is It Easy Being Green? On The Dilemmas Of Material Cultures Of Household Sustainability, Chris Gibson, Gordon R. Waitt, Lesley M. Head, Nick Gill

Faculty of Science - Papers (Archive)

In the 1970s ‘greens’ were normally thought of as radicals because of their uncompromising political views about sustainability, non-violence, social justice and grassroots democracy. Sometimes greens were marginalised as ‘tree-huggers’ because of their affinity with the non-human world. Today, in popular discourse, ‘green’ provides the centre of sustainability gravity (Barr 2003). Green has become a definitive reflection of what individuals are to become as both consumers and citizens. It is easy, it is said, to be green. This is evident from product branding to categories used in government survey results to describe the ‘most acceptable’ household practices. But as green …


Remarkable Synergistic Effects In A Mixed Porphyrin Dye-Sensitized Tio2 Film, Attila J. Mozer, Gordon G. Wallace, David L. Officer, Matthew Griffith, Pawel W. Wagner, Klaudia K. Wagner, George Tsekouras, Shogo Mori, Ying Dong Jan 2011

Remarkable Synergistic Effects In A Mixed Porphyrin Dye-Sensitized Tio2 Film, Attila J. Mozer, Gordon G. Wallace, David L. Officer, Matthew Griffith, Pawel W. Wagner, Klaudia K. Wagner, George Tsekouras, Shogo Mori, Ying Dong

Faculty of Science - Papers (Archive)

A remarkable 300% efficiency enhancement driven by a matching increase in the short circuit current was observed in a mixed porphyrin dye-sensitized solar cell constructed from two dyes in a 3:1 ratio. Absorbed photon-to-current conversion efficiency measurements indicate an improved charge injection yield for both dyes in the mixture. Several possible origins for the observed performance enhancement are discussed.


The Later Stone Age Calvaria From Iwo Eleru, Nigeria: Morphology And Chronology, Katerina Harvati, Chris Stringer, Rainer Grun, Maxime Aubert, Philip Allsworth-Jones, Caleb Adebayo Folorunso Jan 2011

The Later Stone Age Calvaria From Iwo Eleru, Nigeria: Morphology And Chronology, Katerina Harvati, Chris Stringer, Rainer Grun, Maxime Aubert, Philip Allsworth-Jones, Caleb Adebayo Folorunso

Faculty of Science - Papers (Archive)

Background: In recent years the Later Stone Age has been redated to a much deeper time depth than previously thought. At the same time, human remains from this time period are scarce in Africa, and even rarer in West Africa. The Iwo Eleru burial is one of the few human skeletal remains associated with Later Stone Age artifacts in that region with a proposed Pleistocene date. We undertook a morphometric reanalysis of this cranium in order to better assess its affinities. We also conducted Uranium-series dating to re-evaluate its chronology. Methodology/Principal Findings: A 3-D geometric morphometric analysis of cranial landmarks …


1-(3-Chlorophenyl)-2-Methyl-4-Nitro-1h-Imidazole-5-Carboxamide, Pawel W. Wagner, Maciej Kubicki, A Korzanski Jan 2011

1-(3-Chlorophenyl)-2-Methyl-4-Nitro-1h-Imidazole-5-Carboxamide, Pawel W. Wagner, Maciej Kubicki, A Korzanski

Faculty of Science - Papers (Archive)

In the crystal structure of the title compound, C11H9ClN4O3,pairs of NH N(imidazole) hydrogen bonds connect themolecules into centrosymmetric dimers, which are furtherconnected by NH O(carbamoyl) hydrogen bonds intoC(4) chains along [010]. Interplay of these two kinds ofhydrogen bonds connect the molecules into layers perpendicularto [101]. The imidazole [maximum deviation0.0069 (9) A ] and phenyl rings are inclined at a dihedral angleof 58.44 (6); the nitro group is almost coplanar [dihedralangle 5.8 (2)] with the imidazole ring while the carbamoylgroup is almost perpendicular [70.15 (13)] to it.


The Australian Methane Budget: Interpreting Surface And Train-Borne Measurements Using A Chemistry Transport Model, A Fraser, C C. Miller, Paul Palmer, Nicholas M. Deutscher, Nicholas B. Jones, David W. Griffith Jan 2011

The Australian Methane Budget: Interpreting Surface And Train-Borne Measurements Using A Chemistry Transport Model, A Fraser, C C. Miller, Paul Palmer, Nicholas M. Deutscher, Nicholas B. Jones, David W. Griffith

Faculty of Science - Papers (Archive)

We investigate the Australian methane budget from 2005-2008 using the GEOS-Chem 3D chemistry transport model, focusing on the relative contribution of emissions from different sectors and the influence of long-range transport. To evaluate the model, we use in situ surface measurements of methane, methane dry air column average (XCH 4) from ground-based Fourier transform spectrometers (FTSs), and train-borne surface concentration measurements from an in situ FTS along the north-south continental transect. We use gravity anomaly data from Gravity Recovery and Climate Experiment to describe the spatial and temporal distribution of wetland emissions and scale it to a prior emission estimate, …


Climate-Induced Reaction Norms For Life-History Traits In Pythons, Beata Ujvari, Richard Shine, L Luiselli, Thomas R. Madsen Jan 2011

Climate-Induced Reaction Norms For Life-History Traits In Pythons, Beata Ujvari, Richard Shine, L Luiselli, Thomas R. Madsen

Faculty of Science - Papers (Archive)

Climate change modelers predict increasingly frequent ''extreme events,'' so it is critical to quantify whether organismal responses (such as reproductive output) measured over the range of usual climatic conditions can predict responses under more extreme conditions. In a 20-year field study on water pythons (Liasis fuscus), we quantified the effects of climatically driven annual variation in food supply on demographic traits of female pythons (feeding rate, body size, body mass, and reproductive output). Reaction norms linking food supply to feeding rates and residual body mass were broadly linear, whereas norms linking food supply to female body size became curvilinear when …


Trial By Fire: Natural Hazards, Mixed-Methods And Cultural Research, Christine Eriksen, Nicholas J. Gill, Ross A. Bradstock Jan 2011

Trial By Fire: Natural Hazards, Mixed-Methods And Cultural Research, Christine Eriksen, Nicholas J. Gill, Ross A. Bradstock

Faculty of Science - Papers (Archive)

This paper considers the issues of research 'relevance' and 'use' to reflect upon a cultural geography research project on bushfire that did not begin with any specific aim of being useful to policy makers but which has garnered considerable and ongoing interest from a broad audience. It provides an example of how the integration of quantitative and qualitative research methods and data can enhance research into cultural aspects of natural hazards whilst simultaneously playing a key role in ensuring that the research results are of interest to a wide range of groups. Using a mixed-methods research approach was found to …


The Effect Of Field-Collected Biofilms On The Toxicity Of Copper To A Marine Microalga (Tetraselmis Sp.) In Laboratory Bioassays, Jacqueline L. Levy, Jenny L. Stauber, Steven A. Wakelin, Dianne F. Jolley Jan 2011

The Effect Of Field-Collected Biofilms On The Toxicity Of Copper To A Marine Microalga (Tetraselmis Sp.) In Laboratory Bioassays, Jacqueline L. Levy, Jenny L. Stauber, Steven A. Wakelin, Dianne F. Jolley

Faculty of Science - Papers (Archive)

Standard algal growth rate inhibition bioassays can lack environmental realism and may over- or underestimate metal bioavailability in natural systems. In aquatic environments, algal species interact with other biota, including other algae, bacteria and biofilms. In this work, the feasibility of incorporating marine biofilms into 72h algal growth inhibition toxicity tests was explored. The effects of copper on Tetraselmis sp. were tested in the absence and presence of characterised field-collected biofilms. We hypothesised that the addition of biofilm would prevent copper toxicity to the alga primarily through interactions of the metal with other cells and biofilm exudates. The sensitivity …


Photoelectron-Photofragment Coincidence Spectroscopy In A Cryogenically Cooled Linear Electrostatic Ion Beam Trap, Christopher J. Johnson, Ben B. Shen, Berwyck L. J Poad, Robert E. Continetti Jan 2011

Photoelectron-Photofragment Coincidence Spectroscopy In A Cryogenically Cooled Linear Electrostatic Ion Beam Trap, Christopher J. Johnson, Ben B. Shen, Berwyck L. J Poad, Robert E. Continetti

Faculty of Science - Papers (Archive)

A cryogenically cooled linear electrostatic ion beam trap for use in photoelectron-photofragment coincidence (PPC) spectroscopy is described. Using this instrument, anions created in cold, low-dutycycle sources can be stored for many seconds in a ∼20 K environment to cool radiatively, removing energetic uncertainties due to vibrationally excited precursor anions. This apparatus maintains a well-collimated beam necessary for high-resolution fragment imaging and the high experimental duty cycle needed for coincidence experiments. Ion oscillation is bunched and phase-locked to a modelocked laser, ensuring temporal overlap between ion bunches and laser pulses and that ions are intersected by the laser only when travelling …


Rotationally Resolved Infrared Spectrum Of The Na+-D2 Complex: An Experimental And Theoretical Study, Berwyck L. Poad, V Dryza, J Klos, A A. Buchachenko, E J. Bieske Jan 2011

Rotationally Resolved Infrared Spectrum Of The Na+-D2 Complex: An Experimental And Theoretical Study, Berwyck L. Poad, V Dryza, J Klos, A A. Buchachenko, E J. Bieske

Faculty of Science - Papers (Archive)

The infrared spectrum of mass-selected Na+-D2 complexes is recorded in the D-D stretch vibration region (2915-2972 cm−1) by detecting Na+ photofragments resulting from photo-excitation of the complexes. Analysis of the rotationally resolved spectrum confirms a T-shaped equilibrium geometry for the complex and a vibrationally averaged intermolecular bond length of 2.461 Å. The D-D stretch band centre occurs at 2944.04 cm−1, representing a −49.6 cm−1 shift from the Q1(0) transition of the free D2 molecule. Variational rovibrational energy level calculations are performed for Na+-D2 utilising an ab initio potential energy surface developed previously for investigating the Na+-H2 complex [B. L. J. …


Binding Of The Molecular Chaperone Alphab-Crystallin To Abeta Amyloid Fibrils Inhibits Fibril Elongation, Sarah L. Shammas, Christopher A. Waudby, Shuyu Wang, Alexander K. Buell, Tuomas P. Knowles, Heath W. Ecroyd, Mark E. Welland, John A. Carver, Christopher M. Dobson, Sarah Meehan Jan 2011

Binding Of The Molecular Chaperone Alphab-Crystallin To Abeta Amyloid Fibrils Inhibits Fibril Elongation, Sarah L. Shammas, Christopher A. Waudby, Shuyu Wang, Alexander K. Buell, Tuomas P. Knowles, Heath W. Ecroyd, Mark E. Welland, John A. Carver, Christopher M. Dobson, Sarah Meehan

Faculty of Science - Papers (Archive)

The molecular chaperone αB-crystallin is a small heat-shock protein that is upregulated in response to a multitude of stress stimuli, and is found colocalized with Aβ amyloid fibrils in the extracellular plaques that are characteristic of Alzheimer's disease. We investigated whether this archetypical small heat-shock protein has the ability to interact with Aβ fibrils in vitro. We find that αB-crystallin binds to wild-type Aβ42 fibrils with micromolar affinity, and also binds to fibrils formed from the E22G Arctic mutation of Aβ42. Immunoelectron microscopy confirms that binding occurs along the entire length …


Poly(T) Variation In Heteroderid Nematode Mitochondrial Genomes Is Predominantly An Artefact Of Amplification, Angelique H. Riepsamen, Tracey A. Gibson, Janet Rowe, David J. Chitwood, Sergei Subbotin, Mark P. Dowton Jan 2011

Poly(T) Variation In Heteroderid Nematode Mitochondrial Genomes Is Predominantly An Artefact Of Amplification, Angelique H. Riepsamen, Tracey A. Gibson, Janet Rowe, David J. Chitwood, Sergei Subbotin, Mark P. Dowton

Faculty of Science - Papers (Archive)

We assessed the rate of in vitro polymerase errors at polythymidine [poly(T)] tracts in the mitochondrial DNA (mtDNA) of a heteroderid nematode (Heterodera cajani). The mtDNA of these nematodes contain unusually high numbers of poly(T) tracts, and have previously been suggested to contain biological poly(T) length variation. However, using a cloned molecule, we observed that poly(T) variation was generated in vitro at regions containing more than six consecutive Ts. This artefactual error rate was estimated at 7.3 × 10−5 indels/poly(T) tract >6 Ts/cycle. This rate was then compared to the rate of poly(T) variation detected after the amplification of a …


Oxidation Of 4-Substituted Tempo Derivatives Reveals Modifications At The 1- And 4-Positions, David Marshall, M L. Christian, G Gryn'ova, M L. Coote, Philip J. Barker, Stephen J. Blanksby Jan 2011

Oxidation Of 4-Substituted Tempo Derivatives Reveals Modifications At The 1- And 4-Positions, David Marshall, M L. Christian, G Gryn'ova, M L. Coote, Philip J. Barker, Stephen J. Blanksby

Faculty of Science - Papers (Archive)

Potenital pathways for the deactivation of hindered amine light stabilisers (HALS) have been investigated by observing reactions of model compounds - based on 4-substituted derivatives of 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) - with hydroxyl radicals. In these reactions, dilute aqueous suspensions of photocatalytic nanoparticulate titanium dioxide were irradiated with UV light in the presence of water-soluble TEMPO derivatives. Electron spin resonance (ESR) and electrospray ionisation mass-spectrometry (ESI-MS) data were acquired to provide complementary structural elucidation of the odd- and even-electron products of these reactions and both techniques show evidence for the formation of 4-oxo-TEMPO (TEMPONE). TEMPONE formation from the 4-substituted TEMPO compounds is …


On The Growth Of National Geoparks In China: Distribution, Interpretation, And Regional Comparison, Guifang Yang, Zhenghong Chen, Mingzhong Tian, Fadong Wu, Robert A. L Wray, Yamin Ping Jan 2011

On The Growth Of National Geoparks In China: Distribution, Interpretation, And Regional Comparison, Guifang Yang, Zhenghong Chen, Mingzhong Tian, Fadong Wu, Robert A. L Wray, Yamin Ping

Faculty of Science - Papers (Archive)

Since the year 2000 China has created 139 National Geoparks; it started under the guidance of the former UNESCO's Division of Earth Science, and has therefore become one of the pioneers in this aspect. Many National Geoparks in China have been described over the past decade, but an understanding of the range of various landform features and their connection with geological and climatic constraints has not previously been published. Based on an increasing awareness of National Geoparks, the aim of this contribution is to provide a comprehensive overview of the National Geoparks of China by reviewing the geological heritage and …


The Nubian Complex Of Dhofar, Oman: An African Middle Stone Age Industry In Southern Arabia, Jeffrey I. Rose, Vitaly I. Usik, Anthony E. Marks, Yamandu H. Hilbert, Christopher S. Galletti, Ash Parton, Jean Marie Geiling, Viktor Cerny, Mike W. Morley, Richard Roberts Jan 2011

The Nubian Complex Of Dhofar, Oman: An African Middle Stone Age Industry In Southern Arabia, Jeffrey I. Rose, Vitaly I. Usik, Anthony E. Marks, Yamandu H. Hilbert, Christopher S. Galletti, Ash Parton, Jean Marie Geiling, Viktor Cerny, Mike W. Morley, Richard Roberts

Faculty of Science - Papers (Archive)

Despite the numerous studies proposing early human population expansions from Africa into Arabia during the Late Pleistocene, no archaeological sites have yet been discovered in Arabia that resemble a specific African industry, which would indicate demographic exchange across the Red Sea. Here we report the discovery of a buried site and more than 100 new surface scatters in the Dhofar region of Oman belonging to a regionally-specific African lithic industry - the late Nubian Complex - known previously only from the northeast and Horn of Africa during Marine Isotope Stage 5, ~128,000 to 74,000 years ago. Two optically stimulated luminescence …


An Evaluation Of Environmental Factors Affecting Species Distributions, Michael B. Ashcroft, Kristine O. French, Laurie A. Chisholm Jan 2011

An Evaluation Of Environmental Factors Affecting Species Distributions, Michael B. Ashcroft, Kristine O. French, Laurie A. Chisholm

Faculty of Science - Papers (Archive)

Many different models can be built to explain the distributions of species. Often there is no single model that is clearly better than the alternatives, and this leads to uncertainty over which environmental factors are limiting species’ distributions. We investigated the support for different environmental factors by determining the drop in model performance when selected predictors were excluded from the model building process. We used a paired t-test over 37 plant species so that an environmental factor was only deemed significant if it consistently improved the results for multiple species. Geology and winter minimum temperatures were found to be the …


Incorporation Of Chlorinated Analogues Of Aliphatic Amino Acids During Cell-Free Protein Synthesis, Dannon J. Stigers, Zachary I. Watts, James E. Hennessy, Hye-Kyung Kim, Romeo Martini, Matthew C. Taylor, Kiyoshi Ozawa, Jeffrey W. Keillor, Nicholas E. Dixon, Christopher J. Easton Jan 2011

Incorporation Of Chlorinated Analogues Of Aliphatic Amino Acids During Cell-Free Protein Synthesis, Dannon J. Stigers, Zachary I. Watts, James E. Hennessy, Hye-Kyung Kim, Romeo Martini, Matthew C. Taylor, Kiyoshi Ozawa, Jeffrey W. Keillor, Nicholas E. Dixon, Christopher J. Easton

Faculty of Science - Papers (Archive)

3-Chloro-Abu and 4-chloro-Nva are biosynthetically incorporated into E. coli peptidyl-Pro cis-trans isomerase B, as substitutes for Val and Leu, respectively. The extent of incorporation is up to 90%, and substituted protein is catalytically active. By contrast, 4-chloro-Val is not an effective replacement for Ile.


Multiple Incursions And Putative Species Revealed Using A Mitochondrial And Nuclear Phylogenetic Approach To The Trogoderma Variabile (Coleoptera: Dermestidae) Trapping Program In Australia, M. A. Castalanelli, Katarina Maryann Mikac, A. M. Baker, K. Munyard, M. Grimm, D. M. Groth Jan 2011

Multiple Incursions And Putative Species Revealed Using A Mitochondrial And Nuclear Phylogenetic Approach To The Trogoderma Variabile (Coleoptera: Dermestidae) Trapping Program In Australia, M. A. Castalanelli, Katarina Maryann Mikac, A. M. Baker, K. Munyard, M. Grimm, D. M. Groth

Faculty of Science - Papers (Archive)

The Warehouse beetle, Trogoderma variabile (Coleoptera: Dermestidae), is an internationally significant invasive pest of packed goods and stored grain. When it was first documented in Australia at Griffith, New South Wales, in 1977, an eradication campaign was initiated. After several years and considerable effort, the eradication campaign was abandoned. To monitor the presence and spread of T. variabile, surveys were carried out by government agencies in 1992 and 2002. When survey data was compared, it was concluded that the distribution of morphologically identified T. variabile had doubled in most Australian states. Here, we used samples from the 2002 survey to …


Green Fluorescent Protein-Based Biosensor To Detect And Quantify Stress Responses Induced By Dna-Degrading Colicins, Sam Abraham, James Chin, Huub J. M. Brouwers, Bernadette Turner, Ren Zhang, Toni A. Chapman Jan 2011

Green Fluorescent Protein-Based Biosensor To Detect And Quantify Stress Responses Induced By Dna-Degrading Colicins, Sam Abraham, James Chin, Huub J. M. Brouwers, Bernadette Turner, Ren Zhang, Toni A. Chapman

Faculty of Science - Papers (Archive)

Here we report the development of a whole-cell biosensor to detect and quantify the induction of the SOS response activated by DNA-degrading colicins. This biosensor utilizes the SOS-responsive cda promoter to regulate the expression of green fluorescent protein. The biosensor assay revealed induction of stress for all DNA-degrading reference colicins (E2, E7, and E8).


Kinase Inhibitors From Marine Sponges, Danielle Skropeta, Natalie Pastro, Ana Zivanovic Jan 2011

Kinase Inhibitors From Marine Sponges, Danielle Skropeta, Natalie Pastro, Ana Zivanovic

Faculty of Science - Papers (Archive)

Protein kinases play a critical role in cell regulation and their deregulation is a contributing factor in an increasing list of diseases including cancer. Marine sponges have yielded over 70 novel compounds to date that exhibit significant inhibitory activity towards a range of protein kinases. These compounds, which belong to diverse structural classes, are reviewed herein, and ordered based upon the kinase that they inhibit. Relevant synthetic studies on the marine natural product kinase inhibitors have also been included.


Emission Ratios Of The Tropospheric Ozone Precursors Nitrogen Dioxide And Formaldehyde From Australia's Black Saturday Fires, Emma Young, Clare Paton-Walsh Jan 2011

Emission Ratios Of The Tropospheric Ozone Precursors Nitrogen Dioxide And Formaldehyde From Australia's Black Saturday Fires, Emma Young, Clare Paton-Walsh

Faculty of Science - Papers (Archive)

The ‘Black Saturday’ fires were a series of devastating forest fires that burned across Victoria, Australia, during February and March of 2009. In this study we have used satellite data made publically available by NASA from the Ozone Monitoring Instrument (OMI) and the Atmospheric InfraRed Sounder (AIRS) to track the smoke plume from the Black Saturday firestorm and explore the chemical aging of the smoke plume in the first days after emission. We also determined emission ratios for formaldehyde and nitrogen dioxide within smoke from fires actively burning across Victoria between 7 and 17 February 2009. The mean emission ratios …


Determining An Optimal Model For Processing Lidar Data At The Plot Level: Results For A Pinus Radiata Plantation In New South Wales, Australia, Christine Stone, Trent D. Penman, Russell Turner Jan 2011

Determining An Optimal Model For Processing Lidar Data At The Plot Level: Results For A Pinus Radiata Plantation In New South Wales, Australia, Christine Stone, Trent D. Penman, Russell Turner

Faculty of Science - Papers (Archive)

Small-footprint, discrete return airborne laser scanning (ALS or lidar) data is increasingly being used by forest managers to assist forest inventories. In this study, airborne lidar and plot-based data were collected from a 5 000 ha study site within Green Hills State Forest, a Pinus radiata D.Don plantation in southern New South Wales, Australia. A series of area-based lidar metrics were extracted and modelled against four inventory attributes (mean tree height, stem density, basal area and stand volume) obtained from 63 ground plots. For all response variables, regression tree models had the best model fit compared to Random Forest and …


Validation Of The Atmospheric Chemistry Experiment By Noncoincident Mkiv Balloon Profiles, Voltaire A. Velazco, G. Toon, J.-F. Blavier, A. Kleinbohl, G. Manney, W. Daffer, P. Bernath, K. Walker, C. Boone Jan 2011

Validation Of The Atmospheric Chemistry Experiment By Noncoincident Mkiv Balloon Profiles, Voltaire A. Velazco, G. Toon, J.-F. Blavier, A. Kleinbohl, G. Manney, W. Daffer, P. Bernath, K. Walker, C. Boone

Faculty of Science - Papers (Archive)

We have compared volume mixing ratio profiles of atmospheric trace gases measured by the Atmospheric Chemistry Experiment (ACE) version 2.2 and the MkIV solar occultation Fourier transform infrared spectrometers. These gases are H2O, O3, N2O, CO, CH4, HNO3, HF, HCl, OCS, ClONO2, HCN, CH3Cl, CF4, CCl2F2, CCl3F, COF2, CHF2Cl, and SF6. Due to the complete lack of close spatiotemporal coincidences between the ACE occultations and the MkIV balloon flights, we used potential temperatures and equivalent latitudes from analyzed meteorological fields to find comparable ACE and MkIV profiles. The results show excellent agreement for CH4, N2O, and other long‐lived gases but …