Physical Sciences and Mathematics Commons^™

Ultraviolet Stimulated Thermoluminescent Response Characteristics Of Aluminum Oxide, Edward Ryan

Masters Theses & Specialist Projects

This investigation has demonstrated that some aluminum oxide crystals have high sensitivity and are well suited for detecting and measuring ultraviolet radiation rates significantly less than 0.1 pW/cm2. The thermoluminescent glow curve, linearity of response, and fading of the crystals were determined. An action spectrum was performed to determine the relative sensitivities of several crystals in a range of wavelengths from 230 nm to 546 nm. The sensitivity of the crystals was found to decrease as a function of exposure. An explanation for the decrease in sensitivity due to the presence of high temperature traps is presented. This investigation has …

Ultraviolet Stimulated Thermoluminescent Response Characteristics Of Aluminum Oxide, Edward Ryan Iii

Masters Theses & Specialist Projects

This investigation has demonstrated that some aluminum oxide crystals have high sensitivity and are well suited for detecting and measuring ultraviolet radiation rates significantly less than .01 µW/cm².

The thermoluminescent glow curve, linearity of response, and fading of the crystals were determined. An action spectrum was performed to determine the relative sensitivities of several crystals in a range of wavelengths from 230 nm to 546 nm.

The sensitivity of the crystals was found to decrease as a function of exposure. \n explanation for the decrease in sensitivity due to the presence of high temperature traps is presented.

This …

Calculated Temperature Of Grid Lateral Wires In Microwave Power Triodes, Jewell Tucker

Masters Theses & Specialist Projects

In microwave power triodes the grid drive power causes grid lateral wire heating. This development calculates the temperature of the wire as a function of the drive power, physical dimensions and characteristics of the wire material, for the following boundary conditions:

I. Constant grid drive, grid lateral wire of infinite length not connected to a heat sink.

II. Same as I except the wire is of finite length brazed to a grid frame.

III. The grid excitation in the form of pulses, and the grid lateral wire of finite length brazed to a grid frame.

the equations were verified experimentally …

Extraction Rate Study Of Ni(Iii) Oxinate & Separation Of Cu(Ii) & Ni(Ii) With Oxide Based On Differences In Rates Of Extraction, Somchai Taichilassunthorn

Masters Theses & Specialist Projects

This study was conducted with metal ion concentrations in the range of parts per million and used batch extraction techniques to study the non-equilibrium extraction of Cu(II) and Ni(II) oxinates. Contrary to other authors, atomic absorption was used exclusively for the analysis of phases.

The two main areas of investigation in this study were:

1. Kinetics study of extraction of Ni(II) oxinate.
2. Separation of Cu(II) and Ni(II) with oxine based on differences in rates of extraction.

It was the purpose of this work to study the extraction of Cu(II) and Ni(II) with oxine in chloroform. This particular pair of elements was …

A Correlation Study Of Atmospheric Conditions & Incidences Of Respiratory Deaths, Bernice Wilder

Masters Theses & Specialist Projects

Mortality data from two populations, Bowling Green and Lexington, Kentucky, were correlated with atmospheric conditions for this region. The mortality data included the cause of death by respiratory disease, age, sex and race. The respiratory diseases considered in this study were emphysema, tuberculosis, pneumonia, asthma, influenza, acute and chronic bronchitis. The atmospheric conditions considered t have an effect on health were temperature, barometric pressure, relative humidity and precipitation. Mean temperature, mean barometric pressure, and mean precipitation per month were correlated with the death rate per thousand but proved no significance at the .05 level in either study area. IN the …

Photochemistry Of Beta-Methyl-Beta-Nitrostyrene And Its Derivatives, Mohammad Z. Kassaee

Masters Theses & Specialist Projects

o-CH₃, o-CH₃O, m-CH₃O and p-CF₃-β-methyl- β-nitrostyrene (compounds not previously reported) were synthesized using the method of Lappin¹³ and Robertson.¹⁴ These styrenes were irradiated in the U.V. region. The yield of corresponding oximes varied from 85 to 100% in aqueous ethanol. This variation in yield of the oximes was attributed to the effect of the substituent on the phenyl rings of the corresponding styrenes. Electron donating substituents promoted the nitro-nitrite rearrangement and electron-withdrawing groups inhibited this rearrangement. A mechanism is proposed for this reaction which unifies and includes ideas proposed by …

The Lower Reaches Of Long Creek, Kentucky: A Karst Anomaly In Allen County, Doral Conner

Masters Theses & Specialist Projects

A field study of the lower reaches of the Long Creek drainage area in southeastern Allen County, Kentucky, established the karst character of that area. The area heretofore had been described as a non-karst area. Four swallow holes, which individually or collectively totally pirate Long Creek, were identified. Two major resurgences of the pirated flow were located and described. A detailed study of a portion of the Long Creek drainage area revealed thirty-four springs, all of which were pirated at least once, and no flow from these springs reached Long Creek by surficial routes. The field survey also revealed dolines …

Some New Metallocenes, Larry Warfield

Masters Theses & Specialist Projects

The synthesis and characterization of some new metallocenes is discussed. These organometallic compounds contain some of the first reported pi-complexes between an aromatic ylid, triphenylphosphoniumcyclopentadienvlide. and some transition metals.

Also reported is the synthesis of some new mercury halide metallocenes involving dimethylsulfoniumcyclopentadienylide as the sigma bonded organic substrate.

New Applications Of The Mannich Reaction, Yu-Fang Wang

Masters Theses & Specialist Projects

French chemists found that the reaction of trifluoroacetic anhydride with the N-oxide of trimethlyamine leads to the methylenedimethylimmonium trifluoroacetate. This salt is considered to be the actual reagent in the Mannich reaction conducted with dimethylamine and formaldehyde. Indeed use of this salt gives higher yields than those obtained via the classical Mannich procedure. This salt could be distilled under vacuum (5 x 10^-2 mm) and reacted with phenylmagnesium bromide to give an 80% yield of benzyldimethylamine. The trimethlsilyl ethers of ketones were employed as intermediates and exhibited regioselectively. For unsymmetrical ketones, the more stable enol was formed thermodynamically and …

Ua77/1 Western Alumnus, Vol. 45, No. 1, Wku Alumni Relations

WKU Archives Records

WKU alumni magazine. Features the following articles:

• Relevance - Western Environmental Programs
• The Environmental Sciences & Technology Building
• Snodgrass, Jim. Environmental Education
• Hurst, Teri. Carpooling - The Energy Saver
• Henderson, Ray. A Piece of the Rock - Football
• Mud, Rice and Camellias
• Conlin, Bill. Hilltoppers Classy Club - Football
• Feix, Jimmy. Western Pays Its Tribute to This Dear & Gentle Man - Nick Denes
• Bruce, Don. Teacher of the Year - Paula Morgan
• Ward, Robert. Letters from Ireland
• Conway, Sheila. A Dream Come True - Randy Yeager
• Remember When? - Faculty Photograph
• Governor Julian Carroll Honors Dr. L.Y. Lancaster for …

Ua12/2/19 Earth Week, Energy For Student Awareness

WKU Archives Records

Newspaper created by the Energy for Student Awareness group regarding Earth Week and environmental issues.

Ua66/7/2 Newsletter, Wku Chemistry

WKU Archives Records

Newsletter created by and about the WKU Chemistry department.

Ua66/8 Visibility Chart For College Heights Weather Station, J. M. B., Wku Geography & Geology

WKU Archives Records

Visibility chart created for the College Heights Weather Station. The chart measures 40" x 32" and is a series of concentric circles showing visible items up to 8 miles distant from the weather station. The inner most circles are at 1/4 and 1/8 mile intervals; 1/2 mile intervals through 3 miles and then 1 mile intervals to 8 miles. Features included on the chart are Pearce-Ford Tower, McDonald's restaurant, WBKO TV tower, Bowling Green-Warren County Hospital Water Tower, Bowling Green Water tower, Greenview Hospital, knobs and the Greewood Interchange