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X-Ray Diffraction Analysis Of Powdered Samples, William T. Gahan

Bachelors’ Theses

In the Physics laboratories of Marquette University there are two North American Phillips X-Ray Powder Diffraction Cameras. The purpose of this thesis is to place these cameras into operating order, and to check the results obtained from them. Special Telechron motors were fastened to the frame of the cameras to rotate the samples one revolution per minute, adaptable ways were machined to rest the cameras on.

Fluorescent Effects Produced By Rare Earth Elements, William J. Stekiel

Bachelors’ Theses

The subject matter of this thesis had its origin in a phenomena observed in the laboratory during a crystal analysis experiment by means of X-ray diffraction. While using crystals composed mainly of Neodynium and related rare earths as specimens, it was found that an unaccountable darkening of the film occurred in the region near the sample. This excessive darkening (over and above the normal amount produced by incident X-rays) was attributed to some type of back scattering of radiant energy produced by the crystalline elements composing the sample. Thus, the problem of this thesis was to carry out some simple …

Microradiography With Biological Specimens, Arthur D. Wellman

Bachelors’ Theses

Microradiography is a technique in which X-rays are directed through a very thin specimen onto a fine-grained photographic film and the image examined under magnification. It has been used chiefly as a supplementary tool in industrial analysis of metal structures, and even in this field has attained prominence only within the past decade. Its usefulness is limited to fine structures (except where minute flaws or impurities are to be examined in a material), and its success is limited by the degree of clarity in the radiograph to be magnified.

Calibration Of An X-Ray Unit As To Effective Wave-Lengths By Comparing Absorption Coefficients, Jerome James Woyci

Bachelors’ Theses

The purpose of this paper is to determine by the mass absorption coefficients of various substances, namely, aluminum, copper and iron, the effective wave-length of an X-ray beam which passes through particular thicknesses of the above materials. Since an X-ray tube does not emit a monochromatic wavelength but emits heterogeneous wave-lengths, we had to use a comparative method in order to obtain the desired results. It happens that the mass coefficient of absorption of carbon does not vary appreciably with an increase or decrease in wavelength, hence, we can use carbon as our standard or material to which we can …

Additional Equations For The Wigner_Seitz Model Of Solids, Alex Sharley Keene

Bachelors’ Theses

This report consists of an extension of the Wigner-Seitz equations to particular cases and boundary conditions. These equations are tools whereby energy bands and wave functions for a face centered lattice can be determined.

Design Construction And Use Of A Device To Demonstrate Motion In Two Dimensions, Robert R. Karnopp

Bachelors’ Theses

The production of visual materials is an interesting and challenging field for many teachers. This is a type of activity which has possibilities for teacher improvement, and which, at the same time, involves the production of instructional materials that are timely.

The Possibility Of Mercuric Sulfide Having A Yellow Color, John Joseph Savignac

Bachelors’ Theses

The author chose this particular problem because it is directly connected with a subject which he had previously studied and found very interesting. It was also of interest to this author because the answer to the immediate problem must be definite and without qualification, thus leaving no room for ambiguity.

An Investigation Of The Charge Acquired By A Metal Plate When Irradiated By X-Rays, Bernard Keith Betz

Bachelors’ Theses

The Photo-electric effect upon metals irradiated by X-rays can, under certain circumstances be completely concealed by some other phenomenon, unless certain precautions are made. It is the purpose of this paper to discuss the properties of this phenomenon.

Electrometric Microdetermination Of Water In Tungsten And Molybdenum Metal Powders By The Karl Fischer Reagent, Helen C. Efinger

Bachelors’ Theses

The problem of the determination of the moisture content or metal powders has been suggested by the Fansteel Metallur­gical Corporation, where I was formerly employed, as one which might prove of interest to them. I have been particularly interested in a topic of this nature since my only laboratory experience has been in metallurgical chemistry.

In this work I intend to make a comparison and evaluation of various methods of determining the moisture content of tungsten and molybdenum powders in order to show which would be the most applicable. Most of the common methods for determining the amount of moisture …

The Construction And Testing Of An Ionization Chamber Designed For Use In Measuring The Roentgen Intensity Of An X-Ray Source, William F. Lindsay

Bachelors’ Theses

It was the author’s assignment for an undergraduate thesis, to construct an ionization chamber, which, when connected to a Dershem electrometer, could be used to determine the intensity of an X-ray source producing ionization within the chamber. It was desired that the chamber conform to the physical dimensions of the ionization intensity unit, commonly called the “Roentgen".

Solidified Alcohols, Mary Kay Enright

Bachelors’ Theses

The relatively new field of science, colloid chemistry, has risen to become an important addition to man's knowledge of the behavior of matter in the natural world and in the laboratory. Although it can no longer be viewed as a new science, it is still new enough to contain unexplored fields and to intrigue the investigator.

The study of gel formation has been received with interest by chemists of the nineteenth and twentieth centuries. This phenomenon of sudden gel formation instead of the expected crystalline precipitate while extracting with alcohol was encountered often in experimental work.

The inquisitive mind would …

An Investigation Of Haury And Ballard's Method Of Production Of Diketones As Applied To Diketones With Aromatic Nuclei, Eugene Chester Dziadulewicz

Bachelors’ Theses

This investigation was undertaken to determine the feasibility of preparing aromatic diketones by the new and novel method proposed by Haury and Ballard.

The Monadnock Volume 24, Number 2, May 1950, Clark University Geographical Society

The Monadnock (Clark Geographical Society)

Volume 24, Issue 2 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).

Geology Of The Golden Area, Santa Fe County, New Mexico, W. L. Emerick

Earth and Planetary Sciences ETDs

This report represents a detailed study of the geology of a small area in the vicinity of Golden, Santa Fe County, New Mexico. The area is one of low hills, dissected by numerous small arroyos, lying between the Ortiz Mountains on the north and the San Pedro Mountains on the south. To the west the area merges into the Hagan Coal Basin, and to the east the low pass between the mountains descends into the headwaters of Galisteo Creek and into the Estanica Valley.

An Electrochemical Determination Of The Free Energy Of Formation And Solubility Product Constant Of Silver And Mercury Sulfides, Earl Lloyd Gray

Theses and Dissertations

Because present data on free energy of formation and solubility product constants of the metal sulfides are both inconsistent and based on very old experimental data, a new study using modern techniques is amply justified. Because metal sulfide precipitates are often colloidal and becasue the solubility of these sulfides is so low, ordinary physical and analytical methods are not applicable to a direct determination fo the solubility product constant. Therefore, a more reliable thermodynamic approach was undertaken in this study. The standard free energy of formation of silver and mercury sulfide was determined from electromotive force measurements of suitable galvanic …

Harvest Of Wild And Stocked Fish From The Logan River Drainage, Louis S. Pechacek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Logan River heads in the southeastern corner of Franklin County, Idaho, and runs in a south and westerly direction. It enters the state of Utah through the northern boundary in the northeast corner of Cache County. The main stream is fed by two tributary streams which head in separate directions a few miles apart. The Franklin Basin branch is the main contributing tributary while the Beaver Creek branch is nearly as large.

An Investigation Into The Precipitation Of Copper From Mine Water By Cupric Copper Reduction, And The Subsequent Precipitation Of Copper As Cuprous Chloride, Jack T. Gentry

Bachelors Theses and Reports, 1928 - 1970

The objective of this thesis is to determine the possibility of applying a different method to the re­covery of the copper dissolved in the Butte mine waters, and thereby precipitate a purer cement copper with greater efficiency and less iron consumption.

Geology Of The Southern Ladron Mountains, Socorro County, New Mexico, E.A. Noble

Earth and Planetary Sciences ETDs

The Ladron Mountains are in a fault-block range consisting in large part of Pre-Cambrian rocks. They are flanked on the west by Paleozoic sediments and elsewhere by Tertiary and Quaternary deposits. The Pre-Cambrian rocks of the southern Ladron Mountains consist of a thick sequence of quartzite and schist which has been granitized by a sub-adjacent intrusion to such a degree that only remnants of unaltered quartzite and schist remain, the remainder of the rocks being largely paragneiss and para-granite. The nature of the intrusion is not known, but it is suggested that it may have been at least partly formed …

The Sixty-Second Session Of The Iowa Academy Of Science And The Seventeenth Convention Of The Junior Academy Of Science Of Iowa, April 21 And 22, 1950, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Disintegration Of Te121 And Te123 Isomers, Robert Katz, R. D. Hill, M. Goldhaber

Robert Katz Publications

Line intensities in the conversion electron spectra of Te¹²¹ and Te¹²³ were evaluated in a variable field, 180° focusing beta-ray spectrograph. Electron-electron coincidences were obtained between the transition pairs 82-213 kev in Te¹²¹ and 88.5-159 kev in Te¹²³. Decay schemes for the two isomers are shown.

It's Time To Take Stock

United States Environmental Protection Agency: Publications

Likening colleges and universities to the automobile industry may seem far-fetched, but is it? Each is engaged in fashioning and selling necessary products- one trained men, the other mechanical equipment. Both entered the post-war years with production at low ebb; unable to satisfy pent-up customer demands. Time and high-speed assembly lines have bridged the gap of gas buggy shortage. The impact of selective buying by a discriminating public is now real cause for concern among some of the motor moguls. Rumor has had it that schools teaching wildlife management are overproducing. We decided to gather facts and opinions at the …

An Experimental Investigation Of The Alac Processes For The Volumetric Determination Of Phosphates, Gilbert O. Isaacson

Bachelors’ Theses

At present, the best method for the quantitative determination of phosphates is the long gravimetric procedure known as the phospho-molybdate method. Theoretically, a volumetric method using alkalimetry and acidimetry techniques should be applicable. The work reported in the following pages represents an attempt to apply this theory, and thereby greatly facilitate quantitative analysis f or this class of compounds.

Microorganisms And Soil Structure, T. M. Mccalla

Department of Agronomy and Horticulture: Faculty Publications

SUMMARY

Laboratory tests were made to determine the effectiveness of different compounds and microbial groups in increasing the stability of Peorian loess lumps against the action of falling water drops. The influence of these on percolation tests in the laboratory was also determined.

Many organic substances-dextrose, sucrose, starch, peptone, cullulose, and gum arabic-did not themselves contribute directly to soil-structure stability, though these substances do furnish energy material for soil microorganisms, which can convert them readily into either microbial tissue or decomposition products that increase soil-structure stability. Lignin, proteins, oils, fats, waxes, resin, and paraffin increased the stability of lumps of …

Public Health Reports, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Preliminary tests with DDT for the control of mosquitoes, forest insects, and agricultural pests demonstrated that it was toxic to a wide variety of animal life. Because there were indications that the new insecticide would be widely used, apprehension was expressed by some groups that its extensive or indiscriminate use would cause extensive harm to wildlife.

The desirability of carefully controlled use was early recognized by those in charge of extensive programs for the control of insects of public health importance. A joint statement of policy for the use of DDT issued early in 1945 (1) by the Army and …

Physical Properties Of The Ternary System: Ethylene Glycol - Disthylene Glycol - Water, Robert Marvin Tombaugh

Master's Theses or Doctor of Nursing Practice

Since approximately two-thirds (12) of the energy from the fuel in automobile engines is converted to unusable heat, it is necessary that a method of cooling the engines be provided. In most present-day engines of this type, an indirect method is utilized, namely, the transfer of heat to a liquid and thence from the liquid to the surrounding air by means of radiators Water is universally used for the coolant liquid because of its availability and high heat transfer properties. However, water has its limitations. A significant limitation of water as a coolant is its corrosive action causing rust clogging …

Proper Mixtures Of Ellis County Soils For Adobe Construction, And Their Physical Properties, Buster Wayne Read, W. G. Read, H. A. Zinszer

Fort Hays Studies Series

This paper deals with the adobe strategy of construction which is mixing and puddling the materials to be applied to a sun-dried brick or to a structure of that material. The work was divided into three main parts: (1) Survey of Ellis County Soils; (2) Selection of soil material with respect to shrinkage; and (3) Treatment of soils with respect to waterproofing.

The Mt. Pleasant Story, United States Department Of Agriculture

Elusive Documents

No abstract provided.

Ecology And Silviculture Of Whitecedar And Associated Hardwoods In Southern New Jersey, Silas Little Jr.

Yale School of the Environment Bulletin Series

No abstract provided.

Leaflet No 1003 - The Salt Problem In The Wheat Belt, G. H. Burvill

Bulletins 1 - 2999

IN the wheat belt of Western Australian bare patches in farm paddocks are often seen. Many are bare, or almost bare, because of too much salt in the soil. The excess of salt prevents the germination of seeds, or kills living plants, because it causes the water supply for germination or growth to be cut off. This salt problem is so serious in places that single farms or groups of farms have been ruined; wheat growing on them has become unprofitable.

Digestion Studies With Sheep And Wild Antelope On A Sagebrush Ration, Paul Harold Kohler

Electronic Theses and Dissertations

Introduction: Those who are responsible for the management of antelope, range livestock, and the range seek to maintain such a balance that al may thrive and reproduce. This is inevitably a difficult objective since the balance in numbers of antelope and livestock may be changed annually, but range flora changes only in long-time cycles. Therefore, the balance between the wild and domestic species and the range must be adjusted frequently by range and livestock management. The adjustment of the number of domestic animals to fit the carrying capacity of the range may be accomplished by changing management and marketing practices …