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Articles 284161 - 284190 of 293715
Full-Text Articles in Physical Sciences and Mathematics
The History Of The Stream Preservation Movement In Arkansas, Rex Moreland Terry
The History Of The Stream Preservation Movement In Arkansas, Rex Moreland Terry
Honors Theses
The history of Arkansas' Stream Preservation movement is not a long one, because only in the recent past have Arkansans taken a serious look at the long term effects of such things as damming streams and clearing land.
The core of the movement for stream preservation centers around the Buffalo River, in the Northwest Arkansas Ozarks. Because of this, the bulk of this paper will be devoted to the Buffalo.
Average Solid Angle For Detection Of Photon Pair Positron Annihilations, Albert S. Ferrari
Average Solid Angle For Detection Of Photon Pair Positron Annihilations, Albert S. Ferrari
Masters Theses
No abstract provided.
A Study Of Isospin Mixing In 16O Near 18 Mev Exitation Energy, Li-Yun Kuo
A Study Of Isospin Mixing In 16O Near 18 Mev Exitation Energy, Li-Yun Kuo
Masters Theses
No abstract provided.
Time-Series Study Of The Foreshore Zone In A Non-Tidal Environment, Randall Thomas Kerhin
Time-Series Study Of The Foreshore Zone In A Non-Tidal Environment, Randall Thomas Kerhin
Masters Theses
No abstract provided.
Imbedding Graphs In Pseudosurfaces, Wayne S. Petroelje
Imbedding Graphs In Pseudosurfaces, Wayne S. Petroelje
Masters Theses
No abstract provided.
The Constructive Theory Of Distributions, Elsie M. Gustafson
The Constructive Theory Of Distributions, Elsie M. Gustafson
Masters Theses
No abstract provided.
Synthesis And Proof Of Structure Of 2, 2-Dichloro-7h-Cyclobut-(A)-Indian-1-One: A New Route To 4, 5-Benztropolone, Thomas Renwick Potts
Synthesis And Proof Of Structure Of 2, 2-Dichloro-7h-Cyclobut-(A)-Indian-1-One: A New Route To 4, 5-Benztropolone, Thomas Renwick Potts
Masters Theses
No abstract provided.
Use Of Groundwater For Irrigation In 1970: Hamilton And York Counties, Ne, Eugene K. Steele Jr.
Use Of Groundwater For Irrigation In 1970: Hamilton And York Counties, Ne, Eugene K. Steele Jr.
Conservation and Survey Division
No abstract provided.
A New Test For Normality, Richard Leroy Roller
A New Test For Normality, Richard Leroy Roller
All Master's Theses
This paper presents a new test for normality which is based on a complete characterization of the normal distribution. Motivation for the test is given in terms of a proof of this characterization. The test is derived and evaluated by computer-simulated sampling from alternative distributions. The empirical powers of the test generated from such samplings are tabled and compared to nine commonly used tests. Evaluation of the proposed test is discussed and further avenues of investigation are suggested.
A Kinetic Study Pertaining To The Enzymatic Reduction Of Pyruvate By Lactate Dehydrogenase, Ronald Floyd Tienhaara
A Kinetic Study Pertaining To The Enzymatic Reduction Of Pyruvate By Lactate Dehydrogenase, Ronald Floyd Tienhaara
All Master's Theses
The reduction of pyruvate as catalyzed by lactate dehydrogenase has been studied by monitoring the oxidation of DPNH (diphosphopyridine nucleotide) at 340 nm. The kinetic investigation was carried out in phosphate buffer at 25° C. Since pyruvate exists in equilibrium with the enolized and hydrated forms, a kinetic analysis was devised to determine the nature of the true substrate for the enzymatic process. Also, a comparative study was made involving two isozymes of lactate dehydrogenase. The catalytic effectiveness of these isozymes was studied as a function of pH and substrate concentration.
Even-Parity Lattice Resonances And Anharmonicity In Ki: Ag+, Roger D. Kirby
Even-Parity Lattice Resonances And Anharmonicity In Ki: Ag+, Roger D. Kirby
Roger Kirby Publications
We report here the observation of four impurity-induced lattice resonances in KI:Ag+. In addition to the well-known T1u symmetry resonant mode at 17.3 cm-1, we have observed two even-parity resonant modes of A1g and Eg symmetries at 25 and 16.35 cm-1, respectively, and a T1u symmetry gap mode at 86.2 cm-1. The two even-parity modes were detected using far-infrared spectroscopic techniques with the sample in an external electric field. The field induces a strong mixing of the modes of opposite parity and results in large field-induced shifts. The Eg symmetry resonance has also been seen in the Raman spectrum of …
Water Resources News, Volume 3, No. 9, November 1971
Water Resources News, Volume 3, No. 9, November 1971
Water Current Newsletter
Program for the 1972 Interdisciplinary Seminar on Water Issues
Simulation of Groundwater Systems
Summer Short Course Planned
Recyling of Water
OSW Awards Freezing Plant Design Contract
Cloud-Seeding Program
Water Rights Study
"Turn-Key" Approach Proposed for Construction of Waste Treatment Plants
Water Quality Guidelines for Nation Being Updated by NAS for EPA
Nebraska Water Resources and Irrigation Development Seminar for the 1970s
EPA Names New Head of Solid Waste Programs Office
Symposium on Costs of Waster Pollution Control
Research Need
Symposium on Watershed Management
EPA Revising Regulations for Grants and Contracts
Internships in Science and Engineering
Symmetric Binary B-Trees: Data Structure And Algorithms For Random And Sequential Information Processing, Rudolf Bayer
Symmetric Binary B-Trees: Data Structure And Algorithms For Random And Sequential Information Processing, Rudolf Bayer
Department of Computer Science Technical Reports
No abstract provided.
The Howard University Reviews Of Science, Vol 1 No 1, Department Of Physics
The Howard University Reviews Of Science, Vol 1 No 1, Department Of Physics
Physics Faculty Publications
No abstract provided.
Mössbauer-Effect Studies Of The Phase Transitions In Antiferroelectric Pbzro₃ And Ferroelectric Pbti₀.₀₂Zr₀.₈O₃, James P. Canner, C. M. Yagnik, Robert Gerson, William Joseph James
Mössbauer-Effect Studies Of The Phase Transitions In Antiferroelectric Pbzro₃ And Ferroelectric Pbti₀.₀₂Zr₀.₈O₃, James P. Canner, C. M. Yagnik, Robert Gerson, William Joseph James
Physics Faculty Research & Creative Works
The Mössbauer spectra were studied for the antiferroelectric compound PbZrO3 and for the closely related ferroelectric PbTi0.2Zr0.8O3. In both cases, a substitution of 5-mol% BiFeO3 was made to permit the Mössbauer measurements. Little difference was found in the isomer shift in these compounds, whether they were in the ferroelectric, antiferroelectric, or cubic state, indicating that the bonding character is not affected by the transitions among the states. There was a pronounced and approximately equivalent dip in the recoil-free fraction at the Curie points of both the antiferroelectric and ferroelectric materials, associated with …
Survival Of Some Freshwater Fishes In The Alkaline Eutrophic Waters Of Nebraska, D. B. Mccarraher
Survival Of Some Freshwater Fishes In The Alkaline Eutrophic Waters Of Nebraska, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
Of 14 species of freshwater fishes held in cages in one or more of 13 alkaline lakes and ponds in Nebraska, few species survived more than a month where carbonate alkalinity, mostly as compounds of Na2C03 and KC03, was above 300 mg/liter. Of the 14 species tested, Sacramento perch (Archoplites interruptus), fathead minnow (Pimephales promelas), northern pike (Esox lucius), and the black bullhead (lctalurus melas), were the most tolerant of alkaline environments. Most centrachid fishes except A. interruptusand the green sunfish (Lepomis cyanel!us), did …
Report On Water Pollution Problems In Las Vegas Wash And Las Vegas Bay, Environmental Protection Agency
Report On Water Pollution Problems In Las Vegas Wash And Las Vegas Bay, Environmental Protection Agency
Publications (WR)
This report was prepared by the Federal Water- Quality Administration, Pacific Southwest Region, now the Environmental Protection Agency (EPA), Region IX, at the request of the State of Nevada, Department of Health, Welfare, and rehabilitation. In a letter, dated December 5, 1969, this agency asked for technical assistance, as authorized by the Federal Water Pollution Control Act, in developing discharge standards appropriate for Las Vegas Bay, Lake Mead, and the Lower Colorado River. The subsequent study was performed by EPA from January through August, 1970. The establishment of Nevada State Water Quality Standards for these waters will enable responsible officials …
The Ias Bulletin, V5n6, November 1971, Iowa Academy Of Science
The Ias Bulletin, V5n6, November 1971, Iowa Academy Of Science
IAS Bulletin
In this issue:
--- Officers, Directors, and Section Chairmen, 1971-72
--- An Open Letter from the President to the Members of the Iowa Academy of Science
--- Manuscripts for the Proceedings Invited
--- News from the Fall Directors' Meeting
--- Plans for 1972 Spring Meeting Shaping Up
--- Call for Papers for the 1972 Spring Meeting
--- Archeology Section Now Anthropology Section
--- What Ever Became of the Articulation Effort?
--- Future Meetings of the Academy
--- Geology Monograph Widely Distributed
--- New Officers of ISTS
--- Special Summer Study Opportunity Available
--- Do-It-Yourself Kit for Activists
--- 56% of …
The Reduction Of Carbonyl Compounds By Sodium Naphthalenide, James Stinnett
The Reduction Of Carbonyl Compounds By Sodium Naphthalenide, James Stinnett
Masters Theses & Specialist Projects
The purpose of this investigation was to study the reactions of sodium naphthaienide with various aromatic carbonyl compounds, particularly aromatic aldehydes and ketones. Although sodium naphthalenide was first investigated in 1936 by Scott et al, the synthetic utility of this alkali metal adduct in organic chemistry has only recently been explored. It was thought that sodium naphthalenide might provide a synthetic advantage, as compared to sodium metal solutions, in the reduction of carbonyl functions to their respective glycols and/or alcohols.
Thermionic Space Charge Oscillations, William Carl
Thermionic Space Charge Oscillations, William Carl
Masters Theses & Specialist Projects
Thermionic electrons emitted into a potential well will produce radiation, the frequency of which is determined by the transit time of the electrons. This paper investigates the case where radiation is produced by a vacuum tube in which two Pierce guns face each other, one acting as the emitter, the other acting as a reflector. Symmetry and the focusing of the electron beam by the Pierce guns make it possible to make an accurate determination of the electron transit time. Measurements showed that the period of the oscillation was 1.5 times the period required for an electron to traverse the …
Precambrian Geology Of The Central Nacimiento Mountains, Sandoval County, New Mexico, Kent Richard Reed
Precambrian Geology Of The Central Nacimiento Mountains, Sandoval County, New Mexico, Kent Richard Reed
Earth and Planetary Sciences ETDs
The oldest Precambrian rocks in the area of study are represented by abundant inclusions and schlieren of hornblendite, plagioclase-hornblende schist, and plagioclase-hornblende-biotite schist. These inclusions are remnants of a pre-batholithic metamorphic terrane.
The next oldest, and dominant rock in the central Nacimiento Mountains is gneiss that ranges in composition from quartz monzonite to granodiorite. Where strongly sheared, the rock is microcline-biotite-quartz-plagioclase schist. Gradational zones of schist within the gneiss were mapped separately. The gneiss and the schist are cut by metamorphosed spessartite dikes and by leucocratic dikes of various textures and compositions.
Intruding the gneiss in the southeastern part of …
Cellular Inactivation By Heavy Ions, Neutrons, And Pions, Robert Katz, S. C. Sharma, M. Hamayoonfar
Cellular Inactivation By Heavy Ions, Neutrons, And Pions, Robert Katz, S. C. Sharma, M. Hamayoonfar
Robert Katz Publications
The delta-ray theory of the inactivation of cells by energetic heavy ions describes cellular survival after heavy ion bombardment through a two-component survival model, in which 4 operational parameters (E0,m0, σ0, and κ) describe the response of a particular cellular variety in a particular ambient condition, for an arbitrary radiation environment. The quantities m and E0 are the extrapolation number and extrapolated D-37 dose of the survival curve after gamma-ray irradiation. The quantities σ0 and κ are found from the initial slope of survival curves after irradiation with ions of different LET, …
Water Resources News, Volume 3, No. 8, October 1971
Water Resources News, Volume 3, No. 8, October 1971
Water Current Newsletter
WRC Report on Sharing Financial Responsibility of Water Development
Ground-water Quality Simulator
Environmental Impact Evaluation System Proposed
Industry-Government Oil Spill Conference Slated for 1973
National Urban Water Resources Research Program Report Published
River Development to Aid Rural Areas Should be "National Goal"
Water Circulation in San Francisco Bay Described
Discount Rate Raised to 5 3/8 Percent
Cornell Agricultural Waste Conference
Lawsuit Challenges Tennessee -- Tombigbee Waterwater
Corps of Engineers and Public Involvement
A Two-Layer Model Of The North Atlantic Thermocline, P. P. Niiler, Edward R. Simco, R. Larue
A Two-Layer Model Of The North Atlantic Thermocline, P. P. Niiler, Edward R. Simco, R. Larue
Faculty Articles
A two-layer model of mid-oceanic thermocline is developed, and a comparison of the depth and temperature of the thermocline in this model is made with a root-mean-square description of the hydrographic structure of the North Atlantic. It is shown that the Sverdrup balance is maintained within the rms errors, and the entire estimated heat flux from the atmosphere is used to produce the observed density changes along the path of persistent flow.
Computer Sheets, Walter A. Lawrance
Mill Pollution, Walter A. Lawrance
Pool Studies, Walter A. Lawrance
Special Studies, Walter A. Lawrance
D.O. And Other Tests, Walter A. Lawrance
L.A. General Data, Walter A. Lawrance