Physical Sciences and Mathematics Commons^™

Trickle Irrigation, B Swan

Journal of the Department of Agriculture, Western Australia, Series 4

THE introduction of trickle irrigation has caused tremendous interest among commercial irrigators. While not a new concept, its application was formerly restricted to glasshouse and nursery use.

Low Cost Filter For Trickle Irrigation, C R. Coffman, G. L. Godley

Journal of the Department of Agriculture, Western Australia, Series 4

CLEAR water is essential for a successful trickle irrigation scheme. Most water sources are not sufficiently clean and some form of filtration is necessary.

Sprinkler Irrigation In Windy Conditions, K S. Cole, G. C. Brown

Journal of the Department of Agriculture, Western Australia, Series 4

THOSE summer winds—be they cooling afternoon breezes or scorching easterlies—are no help to the irrigationist.

Where sprinklers are used wind can result in uneven irrigation, reduced yields and spoilt produce.

Clay Cover For Roaded Catchments, J L. Frith, R. A. Nulsen

Journal of the Department of Agriculture, Western Australia, Series 4

RECENT dry years have stimulated interest in improved catchments for farm dams. Although roaded catchments have been installed on many farm dams in Western Australia, most of them fall short of their potential for increasing run-off.

Farm Dams In High Rainfall Areas, G C. Brown

Journal of the Department of Agriculture, Western Australia, Series 4

WATER storage is essential on most south-west farms to ensure adequate irrigation supplies in the dry summers. Government irrigation water supply schemes are limited and most farmers must supply their own water storage.

Land Levelling With Scrapers, K R. Southon

Journal of the Department of Agriculture, Western Australia, Series 4

A VARIETY of earth-moving equipment can be used in preparing land for flood irrigation, but the best machine for extensive earth moving over some distance is a power-driven, carry-all scraper.

Simple Evaporimeter For Timing Trickle Irrigation, C R. Coffman

Journal of the Department of Agriculture, Western Australia, Series 4

DIFFERENCES in soil types and size of trees in orchards make it impossible to give a single recommendation for trickle irrigation running time.

Daily running time for each situation can be simply and fairly accurately calculated from weekly readings of an easily constructed evaporimeter.

Assistant Director Retires, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

Mr. G. H. Burvill (63) retired on September 3 as Assistant Director of Agriculture after 44 years with the Department of Agriculture. He joined the Department as a cadet in 1927.

One of Western Australia's best-known agricultural scientists, Mr. Burvill has had an important influence on many aspects of the State's farming industries over more than 30 years.

He has an unequalled knowledge of the State's soils, climate and agriculture.

Testing Grain Crops, H M. Fisher

Journal of the Department of Agriculture, Western Australia, Series 4

TODAY'S competitive markets for crop products stress the need for greater awareness of buyers' requirements and more detailed knowledge about our ability to supply them.

Crop varieties and their performance in different environments are important aspects of production potential.

Bromination Of 1,2-Cyclononadiene And 1,3-Dimethylallene, Edward Benny Samuel

University of the Pacific Theses and Dissertations

Much information has been obtained on the orientation of unsymmetrical reagents about substituted allenes. Although hydrogen halide addition to 1,2-propadiene yields 2-halopropenes,^20,31 it has been ample demonstrated, at least in the case of halogenation and oxymercuration of the 1,2-alkyl substituted allenes, that the attacking electrophile ends up in the product attached to the central carbon of the original allenic system. ^{20,22,31,34,38,39,40} Using optically active 1,3-dimethylallene(15) it has been shown that the bromination and oxymercuration of 15 is stereospecific. ^22,39Knowledge of the absolute configurations of the optically active addition products have made it possible to propose a plausible mechanism …

Thermochemical Bond Energy Studies Of Various Transitional-Metal Bis-Beta-Diketone Compounds And Their Inner Orbital Splittings By Bomb Calorimetry, Charles Irvin Drew

University of the Pacific Theses and Dissertations

The thermochemical technique of static bomb calorimetry was used to determine the heats of combustion for some twenty chelated metal complexes. Studied were the first row transitional metals (Mn⁺² through Zn⁺²) bis-beta diketone complexes of acetylacetome and their related ligands and the acetyl ·· acetonates of Pd⁺², Pt⁺², Be⁺², Ce⁺³, Tl⁺¹, and Zr⁺⁴.

Solid purified samples of from 1 to 2 grams were combusted in a pressurized oxygen atmosphere to the reaction products H₂0 (1), C0₂ (g) and metallic oxides. The temperature …

The Effects Of Divalent Metal Ions On The Micellar Properties Of Sodium Dodecyl Sulfate, Michael U. Oko, Raymond L. Venable

Chemistry Faculty Research & Creative Works

Critical micelle concentrations and micellar molecular weights have been determined for sodium dodecyl sulfate in the presence of nitrates of copper, lead, zinc, and magnesium and critical micelle concentrations have been determined with sodium nitrate and silver nitrate as the added electrolytes. The thickness of the ionic atmosphere at the critical micelle concentration has been found to be 34.1 Å with no electrolyte present and 33.6 Å with 9.66 x 10-6 M sodium or silver nitrate and was found to increase upon addition of the 2:1 electrolytes. This is explained in terms of molecular and ionic interactions. Micellar molecular weights …

Petrology And Petrography Of The Croweburg Coal, North-Central Missouri, William Keith Wedge

Masters Theses

"Under a grant from the National Air Pollution Control Administration, the Missouri Geological Survey undertook a core drilling program of coals in north-central Missouri. The chemical and petrographic characteristics of five complete samples of the Croweburg coal recovered from this drilling project are major contributions of this study. Detailed lithologic logs of the drill cores are an additional contribution of the investigation. Megascopic lithotypes of vitrain, fusain, clarain, and durain as well as areas of mineral matter are described from polished column samples of the Croweburg coal for the first time in Missouri. Measured Croweburg coal sections from five drill …

Deux Monolistrini Nouveaux (Crustacea, Isopoda) Des Eaux Souterraines De Croatie, Christa L. Deeleman-Reinhold

International Journal of Speleology

A new subspecies and a new species are described: Monolistra (Monolistra) caeca meridionalis nov. subspec. was found in three caves in the northern part of Croatia, Yougoslavia. It is distinguishable from the typical form principally by the thin, acuminate form of the protuberance of the protopodite of the 2nd male peraeopod, by the endopodite of the 1st pleopod which bears 3-4 setae (1-2 in M. c. caeca), by the somewhat wider endopodite of the 3rd pleopod and by the shorter, only slightly curved uropods. A sketch shows the situation of 6 newly discovered localities in northern Croatia, 3 of …

Preference Responses And Tolerances Of The Troglobitic Carabid Beetle, Rhadine Subterranea, Robert W. Mitchell

International Journal of Speleology

Studies were made on the preference responses and tolerances of the troglobitic carabid beetle Rhadine subterranea to light, temperature, and relative humidity. The beetles are weakly photonegative and appear to have a strong preference for atmospheres of low saturation deficit. Both these responses seem to be orthokineses. They have a strongly developed temperature sense, and their temperature preferendum shifts seasonally. This response seems to be a klinotaxis. They are neither strongly stenothermal nor stenohygrobic. The preference responses, especially that of temperature, are probably mechanisms tending to restrict the beetles to their habitat. The tolerance data suggest that the epigeum could, …

Thermal Expansivity And Refractive Index Determinations For Some Hydrosol Systems And Their Similarity To Properties Ascribed To "Anomalous" Water, Gerald Wayne Chappue

Masters Theses

"The characteristic thermal expansion and refractive index of aqueous dispersions of SiO₂ and NaOH were determined for samples contained in quartz micro-capillaries. Comparison is made with the expansivity and refractive properties of anomalous water or polywater as reported by other investigators. The similarity between the properties and behavior of various hydrosol systems and those ascribed to anomalous water is cited as a serious challenge to the hypothesized existence of an allotropic modification of water"--Abstract, page ii.

The Flathead Catfish In Unchannelized And Channelized Missouri River, Nebraska, Larry A. Morris, Ralph Langemeier, Arthur Witt Jr.

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

Flathead catfish, Pylodictus olivaris (Rafinesque), were studied in approximately 83.7 km of unchannelized and 67.6 km miles of channelized Missouri River. Growth rates were slower in the unchannelized section than they were in the channelized section. The oldest fish in the unchannelized section was 25 years old, while in the channelized study area the oldest was 10 years. In the pectoral spines of progressively older fish from both sections, enlargement of the lumen obliterated early annuli. Much of the annual increment of growth was accomplished during June, July and August. Males became sexually mature at 3 to 4 years of …

Surface Plasmons And The Reflectivity Of N-Type Insb, William E. Anderson, Ralph William Alexander, Robert John Bell

Physics Faculty Research & Creative Works

The Reflectivity of N-Type InSb Has Been Measured in the Far Infrared. the Doping of the Samples Was Such that the Free-Carrier Plasma Frequency Was Near the LO Mode Frequency. the Results Suggest that Samples with a Sufficiently Thick Damage Layer Show Effects Due to Surface Plasmons. Use of a Simple Model Indicates that the Surface-Plasma Excitations Are Coupled to the Phonons. © 1971 the American Physical Society.

Experimental And Theoretical Study Of The Sign Preference In The Nucleation Of Water Vapor, Daniel R. White, James L. Kassner

Physics Faculty Research & Creative Works

The nucleation of water vapor on ions in atmospheres of helium and argon was studied using an expansion type cloud chamber. Separation of the positive and negative ions was achieved so that the nucleation could be studied as a function of both the sign of the ionic charge and the supersaturation. A semiphenominological theory was developed as an extension of the classical liquid drop theory to include the effects of the ionic charge on the nucleation process. The theoretical model of the prenucleation embryo was assumed to possess an oriented dipole surface layer with the direction of orientation dependent on …

Heisenberg Ferromagnet With Biquadratic Exchange, Harry A. Brown

Physics Faculty Research & Creative Works

The usual Heisenberg Hamiltonian with bilinear exchange -2JS→1•S→2 has been extended to include a biquadratic term -2αJ(S→1•S→2)2, with an adjustable parameter α. A method equivalent to constant coupling was employed to calculate the effect of the biquadratic exchange term on the Curie temperature, magnetization, susceptibility, specific heat, and entropy for lattices with spin-1 atoms. As α goes from 0 to 1, the Curie temperature falls by a factor 2 to 3, while the asymptotic Curie temperature is reduced by the factor 2. The magnetization rises much more rapidly below TC, and the specific heat has a peak and discontinuity several …

The History And Nature Of Pi, Karen A. Rand

Honors Theses

No abstract provided.

A Study Of The Exotic Game Bird Introduction Program In The Sandy Point Area Of Virginia 1970-1971, Hans Wachtmeister

Dissertations, Theses, and Masters Projects

No abstract provided.

Anodic Dissolution Of Beryllium In Anhydrous Media, William Joseph James, Martin E. Straumanis

Chemistry Faculty Research & Creative Works

No abstract provided.

The Oxidative Decarboxylation Of Polyaminocarboxylic Acids - Ii. A Comparative Kinetic Study Of The Oxidation Of Nta, Edta, Cdta And Dtpa With Cerium(Iv) In Sulfuric Acid Media, Samir B. Hanna, Rita Hessley, William H. Webb, William R. Carroll

Chemistry Faculty Research & Creative Works

The rates of oxidation of four chelating agents, NTA, EDTA, CDTA, and DTPA with Ce(IV), in sulfuric acid media, were determined spectrophotometrically by a stopped-flow technique. The reductive ability is in the order CDTA > EDTA > DTPA > NTA. The influence of varying the acidity of the medium was studied, and in each case a maximum in the rate constant vs. [H+] plot was observed. A possible interpretation of the reactivities and the influence of acidity is advanced. © 1971 Springer-Verlag.

Magnetic Behavior Of Rare-Earth Iron-Rich Intermetallic Compounds, Dominique Givord, Remy Lemaire, William Joseph James, Jean Michel Moreau, Jayant S. Shah

Chemistry Faculty Research & Creative Works

The thermal variation of lattice parameters of rare earth-transition metal intermetallic compounds rich in Fe, Co, or Ni in the temperature range of 25-900oK is studied. For the Fe compounds, negative thermal expansion is observed below their magnetic ordering temperatures regardless of the nature of substitutional ordering. For Co and Ni compounds, the thermal expansion behavior is normal. It is then concluded that for the Fe compounds, the magnetic properties are mainly determined by the Fe-Fe interatomic distances and the number of Fe nearest neighbors, whereas for Co and Ni compounds the magnetic properties are determined by the conduction electron …

Anclote Environmental Project Report 1970, Marine Science Institue, University Ofsouth Florida

Reports

A comprehensive environmental study involves lengthy and complex research and this report presents results which are preliminary in nature. The sampling period was limited to the fall (September-November) of 1970 in an area which shows marked seasonality. The results however represent a considerable body of information on the Anclote environment and valuable conclusions can be drawn from them. Included in the reports of each sub-discipline which follow are comments on future objectives, especially those for the coming year.

Anclote Environmental Project Report 1971, Marine Science Institute, University Of South Florida

Reports

The sub-discipline reports which follow represent a considerable body of data on the Anclote environment. In general the results provide additional support for many of the conclusions stated or implied in the Annual Report for 1970 (op. cit.). The considerable diversity and complexity of the Anclote estuary and Anchorage including the major role of the grassbeds is now documented in some detail. The overall results also support previous recommendations concerning power plant construction and design (op. cit.).

Study Of Channel Sediments, James River & Hampton Roads Area, R. J. Huggett

Reports

Bottom sediment samples were collected from 3 locations transecting the channel in the lower James and Elizabeth rivers.

Palladium(Ii) And Platinum(Ii) Complexes Of 2-Cyanophenyl Diphenylphosphine, David Harrison Payne

University of the Pacific Theses and Dissertations

There has been no successful chelation of any phosphorus-acetylenic or phosphorous-nitrile ligand. The objectives of this study were to synthesize such ligands and to study their chemistry and chelating tendencies. The best choice appeared to be the preparation of ortho-substituted triphenylphosphines similar to the chelating ligand allylphenyldiphenylphosphine. The Grignard reactions utilized in the preparation of the olefinic compound could not be used in most cases due to the high reactivity of the acetylene and nitrile function Bromobenzene and iodobenzene have been reacted with alkali metal phosphines under conditions that were probably too drastic for the acetylenic and nitrile functions. There …

Fluorescence Lifetimes And Quantum Efficiencies Of Some 1,10-Phenanthrolines, Paul John Tabakian

University of the Pacific Theses and Dissertations

Fluorescence properties of fourteen substituted 1,10-Phenanthrolines were determined using two different solvent systems. Hour different sets of experiments were performed in order to measure fluorescence lifetimes, quantum efficiencies, absorption and corrected fluorescence spectra, oscillator strengths, and Stoke’s shifts. Two of the phenanthrolines, the 5-Nitro-1,10-Phenanthroline and the 1,10-Phenanthroline-5,6-Dione, did not fluoresce.

A new equation was developed in order to extract the true fluorescence lifetimes τ from the observed fluorescence output f(t), and the lamp decay function I(t). This equation was [see PDF] where “A” was the weight factor or the normalization constant for the appropriate functions. A test of this equation …