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- Western Australia (30)
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Articles 1 - 30 of 40
Full-Text Articles in Physical Sciences and Mathematics
Structure And Stability Of Hexacoordinated Sila Dianions, Mark S. Gordon, Marshall T. Carroll, Larry P. Davis, Larry W. Burggraf
Structure And Stability Of Hexacoordinated Sila Dianions, Mark S. Gordon, Marshall T. Carroll, Larry P. Davis, Larry W. Burggraf
Mark S. Gordon
The structures and stabilities of hexacoordinated silicon-containing dianions SiX6 2- have been investigated by using both ab initio (X= H, F) and semiempirical AMI (X= H, F, OH, Me, Cl) calculations. Both methods predict the hexacoordinated structures to be minima on the potential energy surfaces, although the semiempirical barriers for the reactions SiX6 2- -+ Six5- + x- appear to be rather overestimated based on the ab initio results for X = H, F. The positive charge on the central silicon atom actually increases as the number of ligands increases, and the role of d orbitals on that atom appears …
Structural And Energetic Evidence For Oxygen-Lithium-Nitrogen Chelation In A Model For Asymmetric Induction., Edward Arnett, Michael Nichols, Andrew Mcphail
Structural And Energetic Evidence For Oxygen-Lithium-Nitrogen Chelation In A Model For Asymmetric Induction., Edward Arnett, Michael Nichols, Andrew Mcphail
Michael A Nichols
No abstract provided.
The Reaction Of Organoboranes With N-Chloro-N-Sodiocarbamates: A Convenient Synthesis Of N-Alkylcarbamates, Nanette M. Wachter-Jurcsak
The Reaction Of Organoboranes With N-Chloro-N-Sodiocarbamates: A Convenient Synthesis Of N-Alkylcarbamates, Nanette M. Wachter-Jurcsak
Chemistry & Biochemistry Theses & Dissertations
N-alkylcarbamic acid esters are used extensively as fungicides, herbicides and pesticides. Industrial methods of preparation employ highly toxic reagents in their synthesis. Convenient and safe alternative methods are necessary.
Organoboranes are electrophilic compounds which can be employed as a source of alkyl substituents. They have been shown to successfully transfer alkyl groups to the nitrogen of chloramines. N-Alkylation of carbamic acid esters by reacting the corresponding N-chloro-N-sodiocarbamate with a variety of trialkylboranes is described. The yields of the various N-substituted products are discussed.
Two synthetic methods were devised. Originally, an equivalent of the isolated N-chlorocarbamate salt was added to the …
Structure-Energy Relations For The Aldol Reaction In Nonpolar Media., Edward Arnett, Franklin Fisher, Michael Nichols, Anthony Ribeiro
Structure-Energy Relations For The Aldol Reaction In Nonpolar Media., Edward Arnett, Franklin Fisher, Michael Nichols, Anthony Ribeiro
Michael A Nichols
No abstract provided.
Pea And Faba Bean Symbiosis With Rhizobium., J. Evans, C. Wallace, N. Dobrowolski
Pea And Faba Bean Symbiosis With Rhizobium., J. Evans, C. Wallace, N. Dobrowolski
Experimental Summaries - Plant Research
Trial 89WH55, 89KA57, 89M26, 90A12, 90A13, 90M59, 90M60
Location: Merredin, Konnongorring, Dalwallinu, Wongan Hills, Kojonup, Avondale Research Station.
To undertake relevant field studies to establish whether there are constraints to pea and bean symbiosis, arising from management, environment or genetics, and affecting crop N accumulation and productivity.
Trial 90BA60
Using Le-mat (omethoate) insecticide and legume inoculant on seed.
Location: Badgingarra Research Station,
To measure the effect of Lemat on the nodulation and growth of medics and luceme.
Depth Of Placement And Rates Of Nitrogen For Lupins On The South Coast., M. Seymour
Depth Of Placement And Rates Of Nitrogen For Lupins On The South Coast., M. Seymour
Experimental Summaries - Plant Research
Trial 90E13
Starter nitrogen for lupins, rates x depth of placement.
To determine if the application of nitrogen at seeding will enable lupins to grow vigorously at the beginning of the season, and have better growth at flowering. Deep placement is used to reduce the effects of high nitrogen fertiliser on plant establishment.
Cranola Rapseed Variety Assessment. Cranola Agronomy. Linseed. Tillage., J. D. Warren
Cranola Rapseed Variety Assessment. Cranola Agronomy. Linseed. Tillage., J. D. Warren
Experimental Summaries - Plant Research
Trial 90AB15. 90N68, 90EB39
Canola : assessment of early maturing Stage 2 lines.
Location: Katanning, Newdegate Research Station, East Beverley Annex
Production of Canola in medium rainfall zones offers the opportunity for a rapid expansion of the industry. However presently recommended varieties take too long to mature for the area's shorter growing season. The Stage 2 trials assess Canola lines selected on the basis of earliness from the remnants of Dr Roy's now defunct rapeseed breeding programme as well as selections from Eastern States breeding programmes. The trials arc conducted at three sites to account for environmental effects on cultivar …
Phosphorus Nutrition., M. D. Bolland, M. J. Baker
Phosphorus Nutrition., M. D. Bolland, M. J. Baker
Experimental Summaries - Plant Research
Evaluation of soil test for phosphate on sandy soils.
Results presented for this project, commenced in 1988, which started as a joint project between the Department of Agriculture and Soil Science and Plant Nutrition, School of Agriculture, University of Western Australia.
In the field experiments, 10 levels of superphosphate (three replicates) were applied in May 1988, and 10 levels of superphosphate (also three replicates) were applied in May 1989 onto an adjacent area to the 1988 treatments. Colwell P I(soil test values) and yield data are presented for 1988 and 1989 for the 1988 treatments layed out in 1988, and …
Phosphorus And Sulphur Nutrition Of Pastures In High Rainfall Areas., M. D. Bolland, M. F. Clarke
Phosphorus And Sulphur Nutrition Of Pastures In High Rainfall Areas., M. D. Bolland, M. F. Clarke
Experimental Summaries - Plant Research
J.S.Yeates and M.F.Clarke started these experiments. In January 1990 M.D.A. Bolland replaced J.S. Yeates (who became Regional Manager of the Northern Agricultural Region) as the Research Officer responsible for the management of the long-term experiments, and to continue the research on the topic.
In the experiments the fertilizers wee applied in autumn (March-April) in the years listed in the tables.
Trial 80AL4
Location: Cuthbert.
A new experiment was started in 1989 to compare two partially acidulated rock phosphate (PARP) fertilizers with ordinary (single) superphosphate (OSP).
Trial 84AL32
Location: Denmark
The fertilizers compared are ordinary (single) superphosphate (OSP). New (pre 1990) …
Rhizoctonia Bare Patch Of Cereals And Lupins. Sterile Red Fungus (Srf) And Control Of Take-All Disease In Wheat., G. C. Macnish
Rhizoctonia Bare Patch Of Cereals And Lupins. Sterile Red Fungus (Srf) And Control Of Take-All Disease In Wheat., G. C. Macnish
Experimental Summaries - Plant Research
Trial 86E31
Rhizoctonia strains and paddock history.
Location: Esperance Downs Research Station ( Paddock C5)
To determine the effects of pasture, cultivation and cropping on Rhizoctonia root rot, Rhizoctonia patch and distribution of patch and non-patch strains of R. spp
Trial 88E39
Rhizoctonia patch mini-plot establishment area.
Location: Esperance Downs Research Station ( Paddock N1B)
To examine the effects of cultivation and minimum tillage in patches in lupins and to provide sites for mini-plot experiment.
Trial 88KO15
Rhizoctonia bare patch establishment area.
Location: Kojaneerup annex.
To establish an area (with a known history) for future research.
Trial 89E12
Rhizoctonia bare …
Virus Diseases In Lupins., R. Jones, Simon Mckirdy, A. R. Baker, J. Stevenson
Virus Diseases In Lupins., R. Jones, Simon Mckirdy, A. R. Baker, J. Stevenson
Experimental Summaries - Plant Research
Trial 90BA12, 90WH17, 90A6, 90MT13
Location: Badgingarra, Wongan Hills, Avondale and Mt Barker.
Cucumber Mosaic Virus - Effect of different levels of infection in seed sown.
Trials were done at Badgingarra and Wongan Hills in which plots were sown with seed of cv. Gungurru which transmitted CMV at rates of 5,, l' and O,. The plots were separated by 30 m wide cereal buffers. The intended plant density of 45 plants/sq m (seeding rate 80 kg/ha) was not achieved at either site because of non-wetting soil problems (Table 1). Establishment of CMV infected seedlings as opposed to healthy ones was …
Leaf Diseases Of Wheat, R. Loughman, Geoff Thomas, J. A. Bathgate, W. R. Smith
Leaf Diseases Of Wheat, R. Loughman, Geoff Thomas, J. A. Bathgate, W. R. Smith
Experimental Summaries - Plant Research
Trial 90PE10
Strategic variety mixtures to reduce septoria diseases of wheat. Evaluation of wheat lines for suitability to mixing for septoria control.
Location: Mt. Barker Research Station
To determine components of partial resistance to both Septoria species to ensure that lines with components that are complimentary are chosen for evaluation as mixtures for Septoria control.
Trial 90MT12 and 90ME10
Assessing effects of a paired variety mixture to reduce Septoria.
Location: Borden and Mt Barker Research Station.
To assess the effects of a variety mixture on Septoria diseases.
Trial 90MT11 and 90JE9
Evaluating variety mixtures to reduce septoria, using a range …
Tactical Nitrogen For Wheat., J. W. Bowden, S. J. Burgess, Ian Fillery
Tactical Nitrogen For Wheat., J. W. Bowden, S. J. Burgess, Ian Fillery
Experimental Summaries - Plant Research
Trial 90NO104, 90NO111, 90NO112, 90MO53
Associated Work: 90N0105,111,112, 90M053,54, 55 and 56
Wheat responses to levels, sources and times of application of nitrogen.
Location: Southern Brook, Regan's Ford
This project characterizes the dynamics of nitrogen supply to a wheat crop at each of the sites on which various methods of making fertilizer recommendation were tested. It supposedly provides the "optimum" nitrogen fertilizer regime as well as detailed information on nitrogen supply and demand so that results can be made transferable to other situations.
Trial 90NO105, 90NO112, 90M054
Related trials: 90N0104, 105,111,112; 90M053,54,55 and 56
Tactical nitrogen application for wheat.
Location: …
Management Of Lupin Root Rots In The Northern Agricultural Region., W. Macleod
Management Of Lupin Root Rots In The Northern Agricultural Region., W. Macleod
Experimental Summaries - Plant Research
Trial 90GE93
Field survey of lupin root diseases in the northern wheatbelt.
Location: Northern Agricultural Region - majority within Geraldton Advisory District.
To determine the extent, severity and exact nature of fungi causing root and hypocotyl rots of lupins in the northern wheatbelt.
Trial 90GE98
Effect of time of sowing on rhizoctonia infection of lupins.
Location: Woorree.
To examine the effects of sowing lupins at various intervals after the start of the season on the level of Rhizoctonia hypocotyl rot.
Trial 90EC24
Observations on stunt patch on the eradu sandplain.
Location: East Chapman Research Station.
To examine the effects of …
Pleiochaeta Diseases Of Lupins, Mark Sweetingham
Pleiochaeta Diseases Of Lupins, Mark Sweetingham
Experimental Summaries - Plant Research
Trial 90WH20, 90SC5, 90LG8
Rates of dicarboximide fungicides for lupins.
Location: Wongan Hills Research Station, South Carrabin Research Station, East Hyden.
To compare the disease control and yield response of Rovral and Sumisclex seed treatments at a range of rates.
Trial 90M11, 90BA17
Rates of dicarboxide fungicides for lupins.
Location: Merredin Research Station, Badgingarra Research Station.
To compare the disease control and yield response of Rovral and Sumisclex seed treatments at a range of rates,
Selection And Evaluation Of Medic Lines With Resistance To Aphids And Improved Agronomic Characteristics., P. Evans
Experimental Summaries - Plant Research
Trial 89AB12 and 89AB11
Location: Great Southern Agricultural Institute.
Ten commercial cultivars and twenty breeding lines were evaluated in 1990. To assess the effect of insect attack throughout the season, two treatments were imposed, sprayed throughout the season and unsprayed.
Development And Management Of Cattle Pastures In The High Rainfall Zone., Tony Albertsen
Development And Management Of Cattle Pastures In The High Rainfall Zone., Tony Albertsen
Experimental Summaries - Plant Research
Trial 87V8
Development and management of cattle pastures in the high rainfall zone.
To compare the effect of pasture species, pasture management and grazing management on pasture quantity, quality and cattle production.
Phalaris evaluation
In 1989 ninety three lines of Phalaris agrundinacea backcross with P. aquatica, bred by Dr. R.N. Oram (CSIRO Canberra) were drilled sown into unreplicated 10m single row plots at Vasse Research Station. In addition 7 controls (with two replications) were planted. Similar trials were planted by Mr. L. Cransberg (Albany) and Dr. R.N. Oram (Bendigo).
Evaluation of annual and short term rotation ryegrass.
The increasing range …
Deep Phosphate Banding., R. J. Jarvis
Deep Phosphate Banding., R. J. Jarvis
Experimental Summaries - Plant Research
Trial 90A1
Lupins sown 26/4. York gum/jam sandy loam 33 ppm bic. P. Wheat in 1989. Cultivation reduced yield (one pass banding points). Deep banding P overcame this reduction. No additional response to banding compared with TD or D. No response to P. Yield 2.0 t/ha.
Trial 90A2
Wheat sown 8/6. York gum/jam sandy loam 42 ppm bic. P. Lupins in 1989. All treatments had deep cultivation in the one pass. No response to deep band cf. drilled. 23% response to P. Top yield was 1.9 Oa.
88EB12 Wheat sown 5/6. Loamy grey sand/clay 27 ppm bic. P. Lupins in …
Organochlorine Residues In Soil, Plant And In The Body And Wool Fat Of Wethers., Tony Albertsen
Organochlorine Residues In Soil, Plant And In The Body And Wool Fat Of Wethers., Tony Albertsen
Experimental Summaries - Plant Research
Trial 5841
The accumulation and rundown of dieldrin in wethers.
Location: Brookhampton, Donnybrook, Jindong, Manjimup, Carbunup and Pemberton
The background, aims, experimental method, and the first years results and discussion have been reported in the 1989 experimental summary.
The latter phase of the study was continued until December 1990 on six of the sites (these were Brookhampton, Donnybrook, Jindong, Manjimup, Carbunup and Pemberton) with similar measurements being obtained at regular intervals. The sheep monitored during this phase were the 1989 Main mob and the 1989 Replacement mob.
Trace Element Nutrition., R. F. Brennan
Trace Element Nutrition., R. F. Brennan
Experimental Summaries - Plant Research
Trial 66N14
Long Term Copper Residual Trial
Location: Newdegate Research Station.
To determine the residual value of previously applied copper.
Trial 86N27
Residual Value of Zinc with DAP.
Location: Newdegate Research Station.
To determine the decline in effectiveness of zinc on this soil types using DAP.
86LG34
Residual Value of Copper, Zinc and Sulphur with DAP Fertilizer
Location: South Newdegate.
To determine the decline in effectiveness of copper, zinc and sulphur on this soil types using DAP
Trial 67E8
Grain Yields of Wheat Grown on a Residual Copper Trial.
Location: Esperance Downs Research Station.
The trial was originally designed to …
Weed Control On The South Coast., J. H. Moore
Weed Control On The South Coast., J. H. Moore
Experimental Summaries - Plant Research
Trial 90A141
Barley variety tolerance to herbicides.
Location: Gairdner river.
To determine the tolerance of five barley varieties to 19 herbicides and mixtures.
Trial 90AL43
Herbicides for erodium control in serradella.
Location: North Woogenilup.
To determine the efficacy and phytotoxicity of a range of herbicides at varying rates, on erodium in a first year serradella pasture.
Trial 90AL44
Silvergrass control in pasture.
Location: Cheynes Beach Road.
To determine the efficacy of simazine and gramoxone, either tankmixed or individually at varying rates, on silver grass in a clover based pasture.
Trial 90AL45
Pattersons curse control.
To determine which herbicides and at …
Weed Control In Crops And Pasture., J. Buckley
Weed Control In Crops And Pasture., J. Buckley
Experimental Summaries - Plant Research
Trial 90WH74
Crop establishment trial
Location: Wongan Hills Research Station.
To assess the effect of timing of roundup and sprayseed application and cultivation on crop growth.
Trial 90AB19
Ryegrass control in wheat using slow release trifluralin.
Location: Katanning.
To compare 2 experimental formulations of controlled release trifluralin at 4 rates and 2 timings with some commonly used herbicides for the control of ryegrass in wheat.
Trial 90ME84
Early application of 2, 4-D to wheat.
Location: Corrigin.
To assess the use of 2,4-D.amine at early times of application for the control of broadleaf weeds in wheat.
Trial 90WH92
Early application of …
Weed Control In Cereals And Pastures Including Declared Plants., J. Peirce, B. J. Rayner
Weed Control In Cereals And Pastures Including Declared Plants., J. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 90C49
Grass and broad leaved weed control in direct sown crops.
Location: Chapman Valley Research Station.
The low rate of sprayseed with diuron was not as effective on the grasses. It may indicate some antagonism within the mix as the same rate of sprayseed with metribuzin did not cause any drop in grass control. The addition of 2, 4-D amine may have boosted the mixes activity on capeweed as the sprayseed metribuzin mix was not very good on capeweed.
Trial 90EB37
Grass and broad leaved weed control in direct sown crops.
Location: East Beverley Annex.
Part of the trial …
Characterization Of Organic Sulfur Compounds In Coals And Coal Macerals, Stephen R. Palmer, Edwin J. Hippo, Michael A. Kruge, John C. Crelling
Characterization Of Organic Sulfur Compounds In Coals And Coal Macerals, Stephen R. Palmer, Edwin J. Hippo, Michael A. Kruge, John C. Crelling
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works
Peroxyacetic acid oxidation has been used to investigate the type and distribution of organic sulfur species in samples of vitrinite, sporinite and inertinite, separated from the Herrin No.6 and an Indiana No.5 coal seam. It was established that organic sulfur species were selectively preserved during oxidation and their analysis led to some of the first sulfur-33 NMR spectra obtained for coal. The effects of maceral separation processes on model compounds were also studied. Results from our studies support the following conclusions: 1). Different macerals have different distributions and types of organic sulfur species. 2). Organic sulfur compounds in coal occur …
Geochemistry Of Selected Maine Peat Deposits, Stephen A. Norton
Geochemistry Of Selected Maine Peat Deposits, Stephen A. Norton
Maine Collection
Geochemistry of Selected Maine Peat Deposits
by Steven Allen Norton
Maine Geological Survey, Department of Conservation, Augusta, Maine, 1990.
Contents: Introduction / Purpose of Study / Location of Study Sites / Methods / Acknowledgements / Results / Water Chemistry / Dating of Short Cores / Chemistry of Short Cores / Core Interpretations / Summary / References Cited
Biological Activity And Conformational Analysis Of Nikkomycins And Their Analogs, Eduardo Krainer
Biological Activity And Conformational Analysis Of Nikkomycins And Their Analogs, Eduardo Krainer
Dissertations, Theses, and Capstone Projects
Nikkomycins and polyoxins are peptidyl nucleoside antibiotics produced by Streptomyces species. They are potent inhibitors of chitin synthetases from pathogenic fungi, and polyoxins have been used in Japan for many years as agricultural fungicides and for insect control. Since chitin synthetase is not found in mammals and both families of antibiotics are not toxic, these inhibitors are potentially attractive for clinical use. Unfortunately these compounds seem to have only a fungistatic action, and they are not used clinically at present.
A procedure for efficiently obtaining nikkomycins X and Z of very high purity from crude antibiotic is described. These nikkomycins …
Barley Development Experiment., K. J. Young
Barley Development Experiment., K. J. Young
Experimental Summaries - Plant Research
Trial 88ES1
Mechanisms controlling development in barley.
Location: Melijinup Field Station.
A range of barley varieties have been assessed for their level of adaptation to a range of sowing dates across the cereal growing region of W.A. This study aims to determine the mechanisms controlling development in cultivars which represent the range of development responses available. The relative importance of photoperiod and vernalisation response and inherent earliness will be determined for each variety.
Atmospheric Input Of Polycyclic Aromatic Hydrocarbons To The Sea Surface Microlayer, Lino J. Gallo
Atmospheric Input Of Polycyclic Aromatic Hydrocarbons To The Sea Surface Microlayer, Lino J. Gallo
Dissertations, Theses, and Masters Projects
Atmospheric input of polycyclic aromatic hydrocarbons (PAH) to water was studied and the effects of sea surface microlayer (SSM) determined. The York River system and the Perrin River areas were monitored with a drum skimmer and a high volume air sampler. Experiments were conducted in the laboratory under controlled conditions. The SSM extracted vapor phase PAH of low molecular weight from the air, and there, aromatic compounds went from dissolved into particulate phase very rapidly. Water covered with a natural SSM received much less atmospheric input of PAH than water without SSM in a given period of time. Henry's law …
Comparison Of The Molecular Structures Of Monovalent Cation Salets Of N,N-Dimethyldithiocarbamate. Novel Synthesis And Crystal Structure Of (Phi4)(S2cn(Ch3)2)2h2o, Mark Draganjac, David Minick, Elizabeth M. Holt
Comparison Of The Molecular Structures Of Monovalent Cation Salets Of N,N-Dimethyldithiocarbamate. Novel Synthesis And Crystal Structure Of (Phi4)(S2cn(Ch3)2)2h2o, Mark Draganjac, David Minick, Elizabeth M. Holt
Journal of the Arkansas Academy of Science
Crystals of the tetraphenylphosphonium N,N-dimethyldithiocarbamate dihydrate (C₂₇H₃₀NO₂PS₂; F.W. = 495.6) are monoclinic; P2₁/n; a = 13.349(6), b = 20,968(6), c = 9.800(4) Å, β = 109.01(3)°; Z = 4; V = 2593.4(16) Å^3; Dₓ = 1.269 gcm- 3 . Data were collected at ambient temperature using MoKα radiation (λ = 0.71069 Å).F(000) = 1048, linear absorption coefficient, n = 2.80 cm- 1. The structure was solved by direct methods and subsequently refined by full matrix least squares techniques. Final R value = 0.064 for 1 61 0 reflections and 298 varied parameters. Due to the nature of the cation, interactions …
Evaluation Of Persian And Balansa Clovers., R. Snowball
Evaluation Of Persian And Balansa Clovers., R. Snowball
Experimental Summaries - Plant Research
Trial 89MC6, 89HA3, 89W10
Evaluation of Persian and Balansa clovers.
Evaluate a range of Trifolium species including a selection of Persian and Balansa clovers.