A5044690614- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Water Quality and Pollution Assessment
- Aquatic Ecosystems and Phytoplankton Dynamics
- Soil and Water Nutrient Dynamics
- Marine and fisheries research
- Marine Biology and Ecology Research
- Atmospheric and Environmental Gas Dynamics
- Groundwater flow and contamination studies
- Geological formations and processes
- Coral and Marine Ecosystems Studies
- Geochemistry and Elemental Analysis
- Mine drainage and remediation techniques
- Geochemistry and Geologic Mapping
- Synthesis and Characterization of Heterocyclic Compounds
- Freshwater macroinvertebrate diversity and ecology
- Groundwater and Isotope Geochemistry
- Hydrology and Watershed Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Chemical Reaction Mechanisms
- Inorganic and Organometallic Chemistry
- Geophysical and Geoelectrical Methods
- Geology and Paleoclimatology Research
- Oceanographic and Atmospheric Processes
- Synthesis and Reactivity of Sulfur-Containing Compounds
Commonwealth Scientific and Industrial Research Organisation
1997-2025
CSIRO Oceans and Atmosphere
2016-2023
Eye Care Associates
2016
CSIRO Land and Water
1998-2015
ACT Government
2015
Australian National University
1999-2008
University of Canberra
2007
Ruhr University Bochum
1974
Abstract Die Rotationsbarriere der CC‐Bindungen im 1,3‐Dimethyl‐( 1a ) und 1,3‐Di‐ tert ‐butylallen ( 1b wurde aus den in Gasphase ermittelten Racemisierungsgeschwindigkeiten zu 46.17 bzw. 46.91 kcal/mol bestimmt. Durch Vergleich mit 2‐Buten ergibt sich für die Resonanzenergie des Allyl‐Radikals ein Wert von 14.0 (abgeschätzter Fehler ± 2 kcal/mol).
The variability in the inherent optical properties along an estuary‐coast‐ocean continuum tropical Australia has been studied. study area, Fitzroy Estuary and Keppel Bay system, is a shallow coastal environment (depth < 30 m) with highly turbid waters estuary blue oceanic bay subject to macrotides. Biogeochemical (IOPs) were sampled near‐surface layer spatially across tidal phase during dry season. These determinations included continuous measurements of spectral absorption, scattering...
The dynamic interplay between physical, chemical and biological factors in the development persistence of cyanobacterial blooms impounded rivers is an important topic. Over a 3-year study period, variable climatic conditions were recorded Fitzroy River, Queensland, Australia, which typical, lowland tropical river. Post-flood turbidity reduced available light well-mixed water column to levels insufficient for growth. Only when stratified slowly sinking particles dropped from surface layer did...
Lake Hume, a critical reservoir within the Murray River system, Australia, has been identified as potential source of cyanobacteria in downstream rivers during past mega-blooms. This study aims to evaluate impact lake-level fluctuations on cyanobacterial abundance at dam outlets, with goal mitigating risk intake from hydropower and irrigation outlets periods low levels. Utilising one-dimensional vertical hydrodynamic model (LAKEoneD), simulated time series data water temperature...
The effect of burrowing activities ghost shrimp (Neocallichirus limosus and Biffarius arenosus) heart urchin (Echinocardium cordatum) on the flux dissolved substances across water–sediment interface was examined by comparing transport tracer deuterium oxide (D2O) between sediments overlying water in experimental laboratory tanks with without fauna. This experiment complemented measurements diffusive naturally occurring isotopes radium (224Ra 223Ra) from into column. Despite different habits,...
In freshwater systems, phosphorus is adsorbed predominantly to clay within the sediments. Assuming a linear adsorption/desorption isotherm, rapid equilibrium adsorption, and transport by molecular diffusion, estimates are derived for (a) rates of exchange between pool in sediments dissolved water column (b) time scales re-establish after step change concentration. For oxic sediments, scale order tens days. Anoxic release much faster;the minutes. The treated sewage at Narrabri abruptly raises...
The hitherto unknown sulphones (2-, 4-, and 5-methylsulphonyl- 2-phenylsulphonyl-pyrimidine) sulphoxides 5-methylsulphinyl- 2-phenylsulphinyl-pyrimidine) are prepared from the corresponding thioethers by oxidative methods. 2-Phenylsulphonylpyrimidine is also made 2-chloropyrimidine with sodium benzenesulphinate. 2- 4-derivatives undergo a variety of ready nucleophilic displacement reactions on preparative scale, second-order rate constants for their aminolysis pentylamine or cyclohexylamine...
Abstract Fluxes of carbon dioxide (CO 2 ) and methane (CH 4 from hydroelectric water supply reservoirs are receiving increasing attention around the world with a number research groups having undertaken measurements these emissions across range lakes located in different climates landscapes. The use floating chambers (aka flux chambers) is most common technique for direct measurement fluxes. However, relative performance systems, especially chamber designs, not well documented. We report...
The relative importance of floodplain carbon inputs and in-stream metabolic processes have not been well quantified in major Australian rivers. We seasonal phytoplankton primary production net ecosystem during irrigation flow regimes at four sites each located ~100 km apart the middle Murrumbidgee River. During periods dominated by storage release, gross productivity, system respiration chlorophyll concentrations all increased downstream so that overall metabolism was strongly heterotrophic...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of the thermal cyclobutane to ethylene reaction. Pyrolysis 7,8-cis,exo-dideuteriobicyclo[4.2.0]octaneJohn E. Baldwin and Phillip W. FordCite this: J. Am. Chem. Soc. 1969, 91, 25, 7192Publication Date (Print):December 1, 1969Publication History Published online1 May 2002Published inissue 1 December 1969https://doi.org/10.1021/ja01053a051Request reuse permissionsArticle Views85Altmetric-Citations21LEARN ABOUT THESE METRICSArticle...
Subtropical systems experience occasional severe floods, dramatically altering the phytoplankton community structure, in response to changes salinity, nutrients, and light. This study examined effects of a 1:100 year summer flood on an Australian subtropical bay – Moreton Bay over 48 weeks, from January December 2011. Immediately after maximum levels were reached rivers flowing into bay, lowest highest turbidity values, more than decade, measured areal extent flood-related parameters was...
Abstract Ben Chifley Reservoir, the only potable water supply for Bathurst, New South Wales, Australia, has been experiencing recurrent cyanobacterial bloom problems since 1991. A study was undertaken from June 1998 to July 1999 assess limnological characteristics pertinent eutrophication and associated blooms. From January–May 1999, reservoir exhibited significant numbers of cells, totalling > 9000 cells mL −1 . The highest number (> 27 000 ) recorded during April 1999. quality...
Environmental Context. The Fitzroy River Basin is a major contributor to the loads of suspended sediment and nutrients reaching coastal areas in southern Great Barrier Reef. Cost-effective investment improved land, vegetation, water management lower these requires an understanding sources movement sediments within basin. This multidisciplinary geochemical modelling study provides for first time quantitative estimate spatial hydrology-related variation Basin. Abstract. An integrated...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereoselective and stereospecific thermal isomerizations of trans-1,2-di(prop-1'-enyl)cyclopropanesChristina Ullenius, Phillip W. Ford, John E. BaldwinCite this: J. Am. Chem. Soc. 1972, 94, 16, 5910–5911Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://pubs.acs.org/doi/10.1021/ja00771a071https://doi.org/10.1021/ja00771a071research-articleACS PublicationsRequest reuse...
Environmental context. Undisturbed sediments provide a record to past events in catchment. In this study we examine changes sources of sediment and their variation over the century due climate extensive modification catchment after European settlement. We also highlight how multiple lines forensic evidence acquired from can be used reconstruct history range timescales. Abstract. Enhanced delivery nutrients Great Barrier Reef has potential profoundly influence ecological processes natural...
Abstract Major floods impacted the city of Brisbane, eastern Australia, in January 2011, delivering large amounts dissolved and particulate materials nutrients into adjacent coastal embayment, Moreton Bay. The resulting spatially resolved changes biogeochemical optical properties Bay were examined 1, 2, 6, 19, 49 weeks after main freshwater discharge. One week postflood, total suspended matter (TSM) chlorophyll a (TChl ) concentrations varied over 1 order magnitude throughout Bay, particle...