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Articles 282901 - 282930 of 294041

Full-Text Articles in Physical Sciences and Mathematics

Comparative Phytochemistry Of Saururaceae Essential Oils., Lohit Venkateswara Tutupalli Jan 1974

Comparative Phytochemistry Of Saururaceae Essential Oils., Lohit Venkateswara Tutupalli

University of the Pacific Theses and Dissertations

In view of their native medicinal uses, a systematic investigation of the phytochemistry and Hippocratic screening of three members of the Saururaceac namely, Anemopsis californica, Saururus cernuus and Houttuynia cordata was undertaken.


A New Species Of Sipuncula (Aspidosiphon Exiguus N.Sp.), Belonging To The Interstitial Fauna Of Marine Beaches Collected By Mr. L. Botosaneanu During The Second Cuban-Romanian Biospeleological Expedition To Cuba 1973, S. J. Edmonds Jan 1974

A New Species Of Sipuncula (Aspidosiphon Exiguus N.Sp.), Belonging To The Interstitial Fauna Of Marine Beaches Collected By Mr. L. Botosaneanu During The Second Cuban-Romanian Biospeleological Expedition To Cuba 1973, S. J. Edmonds

International Journal of Speleology

Aspidosiphon exiguous, a new species of Sipuncula, is decribed, belonging to the interstitial fauna of the beaches. The specimens were collected during the second Cuba-Romanian biospeleological expedition in 1973.


Three Papers In Mathematical Logic, Henry P. Miranda '74 Jan 1974

Three Papers In Mathematical Logic, Henry P. Miranda '74

Fenwick Scholar Program

Three papers were written in partial fulfillment of the requirements for the Fenwick Scholar Program 1973-1974:

An Algebraic Proof of the Completeness of Sentential Logic proves the completeness of sentential logic using concepts of Boolean structures.

Godel's Proof of the Incompleteness of Axiomatic Number Theory discusses Godel's Incompleteness Theorem as a landmark in the Foundations of Mathematics which has meaning for mathematicians, logicians, and philosophers alike.

The Independence of the Continuum Hypothesis discusses the nature of independence proofs and briefly describes the boolean valued logic used to obtain the independence results.


Electromagnetic Fields In Water Treatment, Robert H. Fagan Jan 1974

Electromagnetic Fields In Water Treatment, Robert H. Fagan

Retrospective Theses and Dissertations

Properties and characteristics of colloidal systems are reviewed with a discussion of colloid systems to be found in natural and wastewaters. Current electric and magnetic field theory are reviewed and summarized to provide practical application of the theory to engineering problems in the environmental field. Literature of colloidal reactions to electrical and magnetic fields is discussed and reviewed to ascertain areas of potential application of electric and magnetic phenomena to natural and wastewater treatment systems having objectionable colloid suspensions. It is concluded that application of electrical fields (electrophoresis) does not currently hold much promise for practical applications in water treatment …


Dispersion Curves For Surface Electromagnetic Waves With Damping, Ralph William Alexander, G. S. Kovener, Robert John Bell Jan 1974

Dispersion Curves For Surface Electromagnetic Waves With Damping, Ralph William Alexander, G. S. Kovener, Robert John Bell

Physics Faculty Research & Creative Works

The Recent Observation of Back bending in the Dispersion Curves of Surface Plasmons on Silver Can Be Explained by Use of Fresnel's Equations. in the Presence of Damping, the Results of Attenuated-Total-Reflection Measurements Can Be Displayed as Dispersion Curves Either with or Without Back bending. the Measurements for Silver with Back Bending Are Expected for Experiments in Which the Frequency is Fixed, and the Propagation Constant (Or Angle of Incidence) is Swept. © 1974 the American Physical Society.


Optical Pumping In A Flowing Helium Afterglow With Additive Metal Impurity Atoms, Laird D. Schearer Jan 1974

Optical Pumping In A Flowing Helium Afterglow With Additive Metal Impurity Atoms, Laird D. Schearer

Physics Faculty Research & Creative Works

It is demonstrated that in a Penning collision of optically oriented metastable helium atoms with an impurity metal atom such as barium, both the longitudinal and transverse components of spin angular momentum are conserved. This results in a polarization of the ion which may be detected by optical emission in the case of excited ion levels or absorption for the ground states. A series of experiments is described which demonstrates the spin dependence of the Penning-collision process. The magnetic resonance of excited-state ions may be observed directly; from the resonance-linewidth radiative lifetimes may be measured. © 1974 The American Physical …


Fresnel Drag In Uniformly Moving Media, William F. Parks, J. T. Dowell Jan 1974

Fresnel Drag In Uniformly Moving Media, William F. Parks, J. T. Dowell

Physics Faculty Research & Creative Works

A general first-order formula is derived for the Fresnel-drag effect in a uniformly moving medium with a plane surface. The two classical equations due to Lorentz and Laub are shown to be special cases corresponding to different experimental arrangements. The recent experiment of Bilger and Zavodny on Fresnel drag in a ring laser is discussed. © 1974 The American Physical Society.


Fallow Re-Assessment - Wheat Variety Investigations- Root Growth And Moisture Use, D Tennant Jan 1974

Fallow Re-Assessment - Wheat Variety Investigations- Root Growth And Moisture Use, D Tennant

Experimental Summaries - Plant Research

This report summarises progress and data available for the following investigations - Fallow Re-assessment - 72M29. Wheat Variety Investigations - Root Growth and Moisture Use. Location: Wongan Hills Research Station. Merredin Research Station.


Measurements Of The Magnetic Dipole Moments Of The Antiproton And The Sigma- Hyperon, B. Lee Roberts Jan 1974

Measurements Of The Magnetic Dipole Moments Of The Antiproton And The Sigma- Hyperon, B. Lee Roberts

Dissertations, Theses, and Masters Projects

No abstract provided.


Precession Of Positive Muons In Nickel, Mary Louis Grayson Foy Jan 1974

Precession Of Positive Muons In Nickel, Mary Louis Grayson Foy

Dissertations, Theses, and Masters Projects

No abstract provided.


The Effect Of Surface Impurities On The Thermal Accommodation Of Rare Gases On A Tungsten Surface, D. Vincent Roach, Louis Biolsi, Robert E. Harris Jan 1974

The Effect Of Surface Impurities On The Thermal Accommodation Of Rare Gases On A Tungsten Surface, D. Vincent Roach, Louis Biolsi, Robert E. Harris

Chemistry Faculty Research & Creative Works

A Rather Comprehensive Experimental Examination of the Effect of Surface Impurities (Potassium and Cesium) on the Thermal Accommodation of Rare Gases on a Tungsten Surface Has Been Made by Roach and Thomas. the Present Work Examines These Effects from a Theoretical Viewpoint with Particular Emphasis on the Effect on the Thermal Accommodation of Helium on a Tungsten Surface Caused by the Adsorption of Cesium Ions And/or Atoms. for This Examination, the Theory of Allen and Feuer Has Been Utilized using Reasonable Values of the Interaction Parameters for Helium with the Adsorbate as Well as the Force Constant for the Adsorbate-Substrate …


Effects Of Surfactants On Atomic Absorption Analysis Of Dilute Aqueous Copper And Nickel Solutions, Raymond L. Venable, Robert V. Ballad Jan 1974

Effects Of Surfactants On Atomic Absorption Analysis Of Dilute Aqueous Copper And Nickel Solutions, Raymond L. Venable, Robert V. Ballad

Chemistry Faculty Research & Creative Works

No abstract provided.


Comparative Cost Analysis Of Implementing Computer Assisted Instruction On General Purpose Computers, Minicomputers, Or Time-Shared Systems, William Henderson Trueheart Junior Jan 1974

Comparative Cost Analysis Of Implementing Computer Assisted Instruction On General Purpose Computers, Minicomputers, Or Time-Shared Systems, William Henderson Trueheart Junior

Legacy ETDs

No abstract provided.


Nitrous Acid Deamination Reactions Of Benzyl Amino-4,6-0-Benzylidene-D-Hexopyranosides, Wai-Pan Chan Jan 1974

Nitrous Acid Deamination Reactions Of Benzyl Amino-4,6-0-Benzylidene-D-Hexopyranosides, Wai-Pan Chan

University of the Pacific Theses and Dissertations

This study concerns an investigation of nitrous acid deamination of various amino sugar derivatives. Deamination reagents have also been used for the diazotization of aromatic compounds. Nitrous acid deamination was used in the deamination of amino acids pinacolic amino alcohols and amino sugars.


Measurements Of The Average Electric Dipole Polarizabilities Of The Alkali Dimers, Robert W. Molof, Thomas M. Miller, Henry L. Schwartz, Benjamin Bederson, John T. Park Jan 1974

Measurements Of The Average Electric Dipole Polarizabilities Of The Alkali Dimers, Robert W. Molof, Thomas M. Miller, Henry L. Schwartz, Benjamin Bederson, John T. Park

Physics Faculty Research & Creative Works

The average electric dipole polarizabilities of the homonuclear alkali dimers have been measured in an electric deflection experiment. The molecular results are normalized to the corresponding atomic polarizabilities by comparing deflections of atomic and molecular alkali beams passing through an inhomogenous electrostatic field. The average polarizabilities in units of 10-24 cm3 are: Li2(990°K), 34±3; Na2(736°K), 30±3; K2(569°K), 61±5; Rb2(534°K), 68±7; Cs2(515°K), 91±7. Copyright © 1974 American Institute of Physics.


The Thermolysis Of Bornyl And Iso-Bornyl Acetates, Allen Reed Jensen Jan 1974

The Thermolysis Of Bornyl And Iso-Bornyl Acetates, Allen Reed Jensen

Undergraduate Honors Capstone Projects

Recent investigations in the area of acetate gas phase thermolysis indicate a mechanism which involves a similar transition state despite the acetate used. The reaction preferentially goes through a cis-elimination with the β-hydrogen atoms, proceeding through a six-membered ring transition state.

The purpose of this study is to examine the effect of a strained bicyclic ring system upon the mechanism of acetate thermolysis. Throuqh kinetic studies and product identification of the pyrolyzed products of bornyl and iso-bornyl acetate, an insight into the preferred mechanism can be obtained. A previous study (cited later) indicated that the accepted six-membered cis …


Forage Production From Shrubs On Saline Land, C V. Malcolm Jan 1974

Forage Production From Shrubs On Saline Land, C V. Malcolm

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

In the first volume of the Journal of the Department of Agriculture in the year 1900, the results of experiments at Tulare Experiment Station in California on the growing of Australian saltbushes are reported.

Seed was first sent from Australia by Baron von Mueller in June, 1881. Three species of saltbush (A. semibaccata, A. numularia and A. vesicaria) are all reported to have grown well.

Although C. A. Gardner in 1929 suggested the growing of saltbushes for forage, the earliest and clearest recommendations are those of Teakle and Burvill in 1945.

Early research tended to concentrate mainly on the possibility …


Charge Transfer Between H ˉIons And O₂ Molecules And D ˉIons And O₂ Molecules In The Ground State., Paul Edgar Chaplin Jan 1974

Charge Transfer Between H ˉIons And O₂ Molecules And D ˉIons And O₂ Molecules In The Ground State., Paul Edgar Chaplin

Masters Theses

"This thesis has been prepared in the style utilized by the Physical Review A. Pages 1-17 will be presented for publication in that journal. Appendices I, II, III, and IV have been added for purposes normal to thesis writing"-- Abstract, p. ii


Barometric And Pump Test Determination Of The Characteristics Of A Carbonate Aquifer In The Vicinity Of Norman Creek, Phelps County, Missouri., Somchai Wongsawat Jan 1974

Barometric And Pump Test Determination Of The Characteristics Of A Carbonate Aquifer In The Vicinity Of Norman Creek, Phelps County, Missouri., Somchai Wongsawat

Masters Theses

"Carbonate rock aquifers underlie many parts of Missouri. As population and water use increase, these aquifers will increase in importance as sources of water supply. The purpose of this study is to investigate the applicability of barometric calculations and a variety of pump test evaluation equations to a shallow confined doloii mite aquifer. The aquifer is the upper Gasconade Formation of Lower Ordovician age in the vicinity of Norman Creek, south central Phelps County, Missouri.

The response of water level to atmospheric pressure showed that the carbonate aquifer in this study site has a rather high barometric efficiency (Bav …


The Completions Of Local Rings And Their Modules., Christopher Scott Taber Jan 1974

The Completions Of Local Rings And Their Modules., Christopher Scott Taber

Masters Theses

"This paper gives a generally self-contained introduction to the completions of local rings and their modules. The '.Fbrmal Power Series, the Ideal-adic, and the Projective Limit completions are established, and the conditions under which they are equivalent are also given. In addition, two methods of obtaining the completion of an R-module from the completion of the ring Rare supplied. As an ideal of R may also be taken as an R-module, a discussion of obtaining its completion from the completed ring is also provided. Two well-known examples are furnished in this paper"--- Abstract, p. ii


Linear Geometry, Phyllis L. Thomas Jan 1974

Linear Geometry, Phyllis L. Thomas

Masters Theses

"This paper contains material suitable for a one semester course in linear geometry where the student has had a one semester course in linear algebra previously. It compiles information in the areas of affine sets, affine geometry, convex sets, and a few applications. Also included are Caratheodory's theorem and the well-known theorem by Helly as proved by Radon"--Abstract, page ii.


Double Reflection Dips - From Grating Ruled Semiconductors, Le-Fu Teng Jan 1974

Double Reflection Dips - From Grating Ruled Semiconductors, Le-Fu Teng

Doctoral Dissertations

"The double dips, previously observed by Fischer, Anderson, et al., which appeared in the reflection spectra of grating surfaces on the Te-doped semiconductors GaAs and InSb around the plasmon and phonon frequencies have been measured in more detail. In the plasmon region, several possible explanations of the phenomenon are discussed. A simple equation checked with the rigorous theory is proposed and is shown to fit the data well. In the phonon region, the extra dip is calculated and identified as being caused by surface phonons"--Abstract, page ii.


A Numerical Study Of Ordinary Differential Equations With Periodic Coefficients, Richard Bruce Schuessler Jan 1974

A Numerical Study Of Ordinary Differential Equations With Periodic Coefficients, Richard Bruce Schuessler

Masters Theses

"In this thesis a method for solving ordinary differential equations with periodic coefficients is derived. In addition, by utilization of Floquet theory, a theorem is given by which it is possible to determine the stability of the zero solution. Error bounds are given for the method and for the two dimensional case bounds are given for the error in the eigenvalues. Several numerical examples are given to illustrate the method"--Abstract, page ii.


An Analysis Of The Bourbeuse River As A Source Of Concrete Aggregate., David John Lexa Jan 1974

An Analysis Of The Bourbeuse River As A Source Of Concrete Aggregate., David John Lexa

Masters Theses

"This thesis represents a study made to evaluate the sand and gravel deposits of the Bourbeuse River as a source of concrete aggregate. The Meramec River has long been a major source of aggregate in Missouri; however, proposed dam construction will limit the quantity available for exploitation. The Bourbeuse River, a tributary of the Meramec, was chosen for evaluation as an alternate source.

The study was conducted in two parts: an estimation of available quantity; a determination of the quality of the material. Quantity of material was estimated through an analysis of drill logs, correlated with the results of basic …


The Physical And Petrographic Characteristics Of Formcoke Produced Experimentally From Lignite And Subbituminous Coal, Bruce L. Ramsey Jan 1974

The Physical And Petrographic Characteristics Of Formcoke Produced Experimentally From Lignite And Subbituminous Coal, Bruce L. Ramsey

Theses and Dissertations

Formcoke was produced experimentally from a North Dakota lignite and a Wyoming subbituminous coal. The effect of initial charring tem perature (600°C or 900°C), of char grain size (less than 18 mesh, less than 35 mesh, or less than 60 mesh), of briquetting pressure (1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000 or 10,000 psi) of binder percentage (5, 10, 15, 20 or 25 per cent), and of final carbonization heating rate (18°C/:min, 12°C/min or 6°C/min) on formcoke briquet com pressive strength was studied.

A final carbonization heating rate of 6°C/min produced uniform shape briquets. Rates of 12°C/min and …


Interaction Between A Fossorial Rodent (The Pocket Gopher, Thomomys Bottae) And A Desert Plant Community, Ross E. Dingman, Lex Byers Jan 1974

Interaction Between A Fossorial Rodent (The Pocket Gopher, Thomomys Bottae) And A Desert Plant Community, Ross E. Dingman, Lex Byers

Memorandum

No abstract provided.


Deep Creek Validation Study: Results Of Data Search For Aquatic Model, G. W. Minshall, J. Perry Ii, S. Walrath, C. Nimz, M. Mcsorley, J. Brock Jan 1974

Deep Creek Validation Study: Results Of Data Search For Aquatic Model, G. W. Minshall, J. Perry Ii, S. Walrath, C. Nimz, M. Mcsorley, J. Brock

Memorandum

No abstract provided.


Role Of Annual Grasses And Shrubs In Nutrient Cycling Of Great Basin Plant Communities, Lawrence G. Kline, Cyrus M. Mckell Jan 1974

Role Of Annual Grasses And Shrubs In Nutrient Cycling Of Great Basin Plant Communities, Lawrence G. Kline, Cyrus M. Mckell

Memorandum

No abstract provided.


Seasonal Use Of Soil Moisture By Mature Velvet Mesquite (Prosopis Juliflora Var. Velutina), Dwight R. Cable Jan 1974

Seasonal Use Of Soil Moisture By Mature Velvet Mesquite (Prosopis Juliflora Var. Velutina), Dwight R. Cable

Memorandum

No abstract provided.


Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Applications, E. M. Romney, Arthur Wallace, J. D. Childress, J. E. Kinnear, H. Kaaz, P. A.T. Wieland, M. Lee, T. L. Ackerman Jan 1974

Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Applications, E. M. Romney, Arthur Wallace, J. D. Childress, J. E. Kinnear, H. Kaaz, P. A.T. Wieland, M. Lee, T. L. Ackerman

Memorandum

No abstract provided.