Physical Sciences and Mathematics Commons^™

Procedure And Structure For An Instructional Laboratory Which Supplements Research, R. S. Adams Jr.

Journal of the Minnesota Academy of Science

This paper describes the organization of a laboratory course in Soil Chemical Analysis. Students select and pursue small research problems to gain experience in the soil analyses that are discussed in lecture and required in the laboratory. Involvement of the class in an actual research problem proved challenging to both the instructor and the class. The data obtained often supplemented current departmental research. Individual projects were found to be easier to supervise than team problems. This paper reports results of a team project examining parameters of a pot experiment. Shape of the pot, methods of watering, methods of fertilizing, and …

Discharge Of Radioactive And Thermal Wastes, Richard E. Pogue, Dean E. Abrahamson

Journal of the Minnesota Academy of Science

A combination of several economic factors, together with growing concern about air pollution associated with conventional, fossil-fuel electric generating facilities, hos contributed to the increase in size and number of nuclear-powered plants. Although these nuclear plants are "clean" from the standpoint of conventional air pollutants, they must dispose of thermal and radioactive wastes. This paper outlines the sources and quantities of these wastes, based on technical data for the boiling-water reactor proposed for Monticello, Minnesota.

An Urgent Appeal For Information On Minnesota's Natural Areas

Journal of the Minnesota Academy of Science

No abstract provided.

The Cedar Creek Natural History Area: A Progress Report, William H. Marshall

Journal of the Minnesota Academy of Science

During the past five years, the utilization of the Cedar Creek Natural History Area by educators, research workers, and special, groups has increased steadily. Progress in administration, management, operations, and land acquisition is described in this paper, and the needs for the future are indicated.

Morphology And Water Quality In Three Abandoned Granite Quarries, Keith M. Knutson

Journal of the Minnesota Academy of Science

Limnological conditions were studied in two abandoned granite quarries in George Friedrich Park, St. Cloud, Minn. These quarries were excavated from 1886 to 1890 and left shallow due to inadequate water pumping systems at the time. The quarries were less than one hectare in area and had mean depths of 7.3 and 8.2 m. The annual heat budget was about the same for both quarries, 10,535 gm. cal/cm•. Concentrations of [chemical symbols] were determined. Very low concentrations of nitrate nitrogen were found ([chemical symbols]). The hypomimia of both quarries contained hydrogen sulfide throughout the study. Data show West Quarry to …

An Investigation Of Amino Acid Decomposition, Jack H. Frost, E. Winston Grundmeier

Journal of the Minnesota Academy of Science

Amino acid decarboxylation studies generally show that extraneous reactions accompany CO, formation, especially at high temperature and when metal ion catalysts are used. In the present study some of these reactions are investigated in the reaction system, a- or ,a-amino acid and CuSO, at 130-155° C. Histidine, a- and .B -alanine, glycerine and norvaline were each studied for determination of products. The extent of formation of the products, NH,, CO,, aliphatic amines and Cu metal, was determined quantitatively. A near l: l correspondence in NH,:CO2 exists for the amino acids studied. No correspondence could be detected between Cu metal product …

Coleambally Irrigation Area: Herds, Crops, Fruit, Lydia Belthuis

Journal of the Minnesota Academy of Science

Coleambally, a new irrigation unit, to the south of the Murrumbidgee Irrigation Area in Australia, has come into operation since 1960. It is the first land to receive water from the large Snowy Mountain power and water storage development in southeastern New South Wales. This district of some 139,000 acres now produces rice, wheat, hay, vegetables, fat lambs and wool. When all Snowy Mountain structures are completed and reservoirs filled, the irrigation area will be more than tripled in size.

Dehydration And Rehydration Behavior Of Zinc And Magnesium Sulfate Heptahydrates, Hanaa Youssef Ghorab

Archived Theses and Dissertations

No abstract provided.

The Critical And High‐Temperature Behavior Of A Heisenberg Ferromagnet, Harry A. Brown

Physics Faculty Research & Creative Works

No abstract provided.

Cell Model Of A Fluid. Ii. Thermodynamic Properties Of The System, Ralph G. Tross, Louis H. Lund

Physics Faculty Research & Creative Works

In Paper I of this series (preceding paper) the model was formulated mathematically, and the solution derived in the form of an infinite series. The convergence and analyticity of the solution were investigated. It was then applied to one-, two-, and three-dimensional systems with nearest-neighbor interactions, and low-temperature series for these systems were obtained. In the present article the thermodynamics of the model are investigated. The series solution of the partition function derived in Paper I is applied to systems with interaction potentials of increasing complexity. The validity of the model is established by showing that in the appropriate limits …

Cell Model Of A Fluid. I. Evaluation Of The Partition Function And Series Expansions, Ralph G. Tross, Louis H. Lund

Physics Faculty Research & Creative Works

The partition function of a one-dimensional system of particles with all interactions active is formulated in terms of Ising ferromagnetic spin states. It is shown how the partition function for two- and three-dimensional systems can be obtained from the one-dimensional one by restricting the number of bonds per particle. After writing the partition function in matrix form, the operator of interest is diagonalized and its trace expressed in the form of a convenient infinite series. The series is shown to be absolutely convergent and its analytic properties are briefly investigated. It is then applied to one-, two-, and three-dimensional systems …

Dielectric Properties Of Solid Solutions Of Bifeo₃ With Pb(Ti, Zr)O₃ At High Temperature And High Frequency, Robert Travis Smith, Gary D. Achenbach, Robert Gerson, William Joseph James

Physics Faculty Research & Creative Works

Solid solutions of BiFeO₃ with PbTiO₃, PbTi_0.5Zr_0.5O₃, and PbZrO₃ were prepared. The crystallographic data on these solutions, which are basically perovskitic, are given. The dielectric constants of the materials were determined at a frequency of 0.53 GHz and at temperatures up to 800°C. Dielectric Curie points were found in solutions containing up to 90 mole % BiFeO₃. These results leave little doubt that BiFeO₃ is ferroelectric or antiferroelectric. The extrapolated Curie point for BiFeO₃ is above 850°C. BiFeO₃ appears more likely to be ferroelectric than …

Distribution And Mortality Of Saskatchewan-Banded White-Fronted Geese, Harvey W. Miller, Alex Dzubin, John T. Sweet

Nebraska Game and Parks Commission: Staff Research Publications

At its annual spring meeting in 1959 the Technical Committee of the Central Flyway Council recognized a decreased population of the white-fronted goose (Anser albifrons). The recorded harvest in Canada and the United States had exceeded the estimated wintering population in some years. After summarizing records for the Central and Mississippi Flyways the Committee found them inadequate for management and to help fill this void, recommended banding on local concentration areas including Saskatchewan.

Etude Du Comportement De L'Homme En Milieu Souterrain (Bilan De Cinq Experimentations), Pierre Saumande

International Journal of Speleology

In the course of live specially planned expeditions, the author studied the behaviour of man in the very special environment of caves. He explains the tests employed. The results obtained suggest that the human organism seems able to adapt to this uncommon environment but exhibits lethargy and reduced activity.

An Analytical Study Of Air Circulation In Caves, Arrigo A. Cigna

International Journal of Speleology

The different types of air circulation in caves are classified according to the origin of the circulation, as either static or dynamic. In a cave static causes are: (a) differences between inside and outside air density owing to: (i) air temperature; (ii) relative humidity; (iii) chemical composition; (b) atmospheric pressure variation. Dynamic causes are: (a) moving fluids: (i) inside the cave; (ii) outside the cave. Whenever possible the above mentioned phenomena have been considered from a mathematical point of view in order to obtain equations relating the different quantities involved.

Beiträge Zur Kenntnis Der Cavernicolen Antroleucosomiden (Diplopoda, Ascospermophora), Ionel Tabacaru

International Journal of Speleology

The family of the Antroleucosomidae is known from the Mediterranean region. In this paper the author describes the new genus Dacosoma with the species D. motasi of caves of the southern Carpathians together with two new species of Bulgarosoma, B. Ocellatum n. sp. of the caves of Mount Banat and B. meridionalis of the cave on Rhodope mountains. A new and complete description is also given for Antroleucosoma banaticum Verh. 1899 and B. bureschi Verh. 1926 based on the study of material coming from the type localities.

On A New Species Of Earthworm From A Mexican Cave, Gordon Gates

International Journal of Speleology

Eodrilus mexicanus of the megadrile oligochaete family Acanthodrilidae is described along with some data as to development, regeneration and abnormality. Relationships with its American congeners, often inadequately characterized, are discussed and the present state of Eodrilus systematics is criticised. E. mexicanus seems likely to be of unusual interest as the second species of earthworm to have ovaries in segment xii.

A Propos De Troglobies Vivant Dans Les Eaux D'Une Mine De Fer De Lorraine, Jean-Paul Henry, Claude Marvillet

International Journal of Speleology

Two explorations of the galleries of the Orne-Pauline iron mine at Moyeuvre-Grande (Moselle), made one year apart, resulted in the collection on each occasion of varied and abundant material (5 spp. of peracarid crustaceans and a worm) of aquatic troglobites: 3 spp. of Niphargus, one of which is new to Lorraine (N. kochianus kochianus), 2 spp. of isopods, Asellus cavaticus and Caecosphaeroma burgundum (for which this is the northernmost locality), and finally a local form of Dendrocoelides collini.

Compte-Rendu De La Conférence Internationale De Spéléologie Et De Karstologie D'Istanbul (24 Sept.-14 Oct. 1964), Paul Fenelon

International Journal of Speleology

Arranged by geologist Dr. Temucin Aygen, the International Conference of Speleology and Karstology at Istanbul, with the participation of about twenty foreign scholars, opened first at Beyazit de Stamboul University. For three days papers and discussions enlivened the sessions, broken by tours around the Bosporus. During the following two weeks the members of the Conference took a field trip across Anatolia, through Ankara, Konya, Mersin, Antalya, Burdur, Izmir, Bursa, and Istanbul. They thus had the opportunity to investigate the principal karstic phenomena of Turkey - the Konya obrouks, travertines of’ Yerkòpru and Antalya, caves of the Mersin region, vauclusian springs …

Sur Quelques Collemboles Cavernicoles De Roumanie, Magdalena Gruia

International Journal of Speleology

An important collection of Collembola from Romania contained six species. One of them is new - Onychiurus orghidani n.sp. found in one cave of Oltenia. The presence of Onychiurus boldorii Denis in Romania is reported for the first time, and the discovery of a large number of Beckerella spelaea Ionesco made it possible to place this species in the genus Xenylla. Finally, additions are made to the known geographic distributions of Mesachorutes ojcoviensis Stach and Lepidocyrtus serbicus Denis.

Mineralization Of The Boss Bixby Anomaly, Iron And Dent Counties, Missouri, Frederick Joseph Smith

Masters Theses

"The Boss-Bixby deposit is located on the line dividing Iron and Dent Counties and belongs to the Southeast Missouri Precambrian Iron Metallogenic Province. The sequence of events leading to the formation of the deposit is reviewed. The mineralization occurred after intrusion of intermediate magma, but prior to the intrusion of granite. The ore minerals present are the following in the order of deposition: magnetite, ilmenite, giekielite, hematite, rutile, pyrite, molybdenite, cobaltite, chalcopyrite, bornite, sphalerite, galena, limonite, chalcocite, and cuprite. Four different methods of zoning are presented. Partial pressures of oxygen and sulphur [sic], as well as temperature controlled sequential deposition …

A Study Of Solvent Effects On The Reaction Between P-Nitrobenzyl Chloride And Hydroxide Ion In Aqueous Dioxane Homogeneous Media, Ken K. Ho

Masters Theses

"The kinetics and activation parameters of the reaction between p̲, p̲' - dinitrostilbene quantitatively, have been studied in five aqueous dioxane solvent systems at five different temperatures between 20⁰ and 40⁰C. At any one temperature the second-order rate constants are minimum in the 30% dioxane solvent mixture, reach a maximum in the 50% dioxane systems, and fall off slightly in the 60% and 70% dioxane systems. The Arrhenius activation energies are highest in the 30% dioxane and lowest in the 70% dioxane systems. The free energies of activation change in the same direction but the magnitude of change is much …

Sulfide Mineralogy And Fabrics Of The Iron Ores At Benson Mines, New York, Pedro Hugo TumialáN De La Cruz

Masters Theses

"The occurrence of sulfide minerals and their textural relationships to the silicate and oxide minerals in the Benson Mines, New York, iron deposit were investigated by ore microscopic and petrographic means. The Benson deposit is one in which the dominant iron oxides, magnetite and hematite, occur in a quartz-feldspar gneiss which was subjected to hornblende granulite subfacies metamorphism. Two hundred ore and country rock specimens were systematically collected from all parts of the open pit mine. Polished sections and thin sections were prepared from nearly all of the collected specimens. The oxide ore exhibits a granular texture in which isolated …

Endogenous Metabolism Of Polyporus Sulfureus. : Utilization Of Exogenous Carbohydrates And Fatty Acids, Shu-Mei Wang

Masters Theses

"A strain of Polyporus sulfureus from the collection at the University of Missouri at Rolla was used in this investigation. Organisms of this genus have been reported to produce eburicoic acid in good yield and this was confirmed for the organism used in this study by the isolation and identification of eburicoic acid from the mycelium. Growth studies of this organism showed that 4% malt extract is a better medium than synthetic media containing asparagine, nitrate or nitrate plus 0.5% yeast extract as nitrogen sources. An examination of the pH of the culture medium led to the conclusion that regardless …

The Downhole Suspension And Testing Of An Electrodynamic Shear Wave Exciter, Robert Franklin Kehrman

Masters Theses

"The work in this research project was aimed at designing a Downhole Electromagnetic Shear Wave Generator capable of delivering a wide frequency band, random, continuous signal. This Exciter was built using a compressed-air driven piston assembly for downhole application. The device was tested in the laboratory in a concrete test facility. It proved to be capable of transmitting a continuous, measurable stress into the concrete in a 100 to 5,000 hertz frequency band"--Abstract, page ii.

Absolute Specification Of X-Ray Spectra By Laplace Transform Analysis Of Attenuation Data, Gerald Robert Lusk

Masters Theses

"A well characterized, variable plate separation ion chamber was utilized as a detector to collect x-ray attenuation data for generating information on the Laplace transform predicted spectrum of a 50 KvCP conventional x-ray tube. The variable plate separation feature allows one to include a wavelength dependent correction to the detector response which is associated with the hardening of the x-ray spectrum as it traverses the attenuating material. With this correction, the conventional two-term Laplace transform was shown to approximate independently the bremsstrahlung and characteristic L radiation from the tungsten target. The detector provides an absolute statement of the target-referenced x-ray …

West Midlands Development : The Interpretation Of Lands Department Soil Maps Of The West Midlands Area, T C. Stoneman

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

Before most Crown land in the West Midlands area was released, Lands Department survey parties examined and mapped the soils using a soil classification system based on technical advice from the Department of Agriculture.

West Midlands Development : Fertilizers For The West Midlands, Department Of Agriculture, Western Australia

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

FARMING the light lands of the West Midland area would be impossible without fertilisers.

Most light land areas are inherently very low in phosphate and also require nitrogen.

The nitrogen can come from fertiliser for cereal crops, or can be built up by growing appropriate legume pasture plants such as clovers and lupins.

West Midlands Development : Cereals For The West Midlands, Department Of Agriculture, Western Australia

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

THE sandplain soils and climate of the West Midlands area are primarily suited to grazing.

However, the place of cereals is receiving a great deal of attention in view of their advantages in the early stages of development, and the need for the diversification of farm production.

Wheat In Development Programmes For New Esperance Farmers, R J. Doyle, G. D. Oliver

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

IN the December, 1967, issue of the Journal of Agriculture, we reported on five development budgets for the Esperance region.

The aim of the exercise was to find out if a new settler concentrating on sheep, with $20,000 available for development after acquisition of land, could make a reasonable living for himself and his family while developing his farm.