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Articles 68911 - 68940 of 69073

Full-Text Articles in Physical Sciences and Mathematics

The Crystallation Of Estrogen-Binding Protein From Candida Albicans, Carl Francis Ackerbauer Jun 1930

The Crystallation Of Estrogen-Binding Protein From Candida Albicans, Carl Francis Ackerbauer

Honors Theses

Cells of the type, Pt +, Metallic Salt, Incadescent Electric Lamp, were investigated for a study of the elctrolytic proceses whereby various ions entered and replaced others already in the glass. The medium has a high viscosity even to temperatures of several hundred degrees. The Study was confined to the nature of the changes and a possible quantitative result. Glass conducts electrolytically at all temperatures but more so at high temperatures, the Na + travels toward the cathode while the Sio--, not being a simple ion, and being very sluggish remains practically stationary. If the material, capable of supplying ions …


A Study Of Some Properties Of Silicic Acid Gels, William Joseph Rothemich Jr. Jun 1930

A Study Of Some Properties Of Silicic Acid Gels, William Joseph Rothemich Jr.

Honors Theses

When a solution of sodium silicate or water glass is mixed with an acid sooner or later a gel is formed. The speed of gelation is known to be dependent upon the concentration of water glass, the excess of acid or alkali present, agitation, temperature, and the kind of acid used. In my work with the setting of the gels these five points were kept as constant as possible.


The Determination Of Hydrogen Ion Concentration By The Electrometric Method, Evelyn Matthews Cook May 1930

The Determination Of Hydrogen Ion Concentration By The Electrometric Method, Evelyn Matthews Cook

Chemistry Honors Papers

This 12 page thesis examines the measurement of ion concentrations in solution using electrometric titration.


A Study Of The Dissociation Of Calcium Hydride, Kenneth Elwin Walker May 1930

A Study Of The Dissociation Of Calcium Hydride, Kenneth Elwin Walker

Honors Theses

The calcium hydride equilibrium has been investigated by a number of men but the results obtained have been almost as diversified as the the number of workers. There is considerable doubt as to the mechanism of the dissociation and the compounds formed. Some workers claim evidence of the two hydrides while others found only the normal hydride, CaH2. In most of the previous work, the equilibrium has been more or less disturbed by the volatility of the calcium and the hydride and also the reaction of the calcium or the hydride on the quartz containers. In this work an attempt …


The Effect Of Current Density On The Efficiency Of A Brass Cathode In Chromium Plating, Anton E. Budner May 1930

The Effect Of Current Density On The Efficiency Of A Brass Cathode In Chromium Plating, Anton E. Budner

Bachelors’ Theses

That chromium could be electrodeposited from chromic acid baths, has been an accomplished fact for over 70 years. However, only in the past few years, has the mechanism of the process been sufficiently understood to permit chromium plating on a commercial basis. Because of the properties and advantages of this particular deposit, tremendous interest and activity has developed in this practically new field. Numerous patents have been granted, but relatively little specific scientific information has been published. Much work can yet be done towards the development of this field. It is the problem of this thesis to study the effect …


A Study Of Various Metallic Electrodes In Potentiometric Titrations, Louie Boncyk May 1930

A Study Of Various Metallic Electrodes In Potentiometric Titrations, Louie Boncyk

Bachelors’ Theses

The significance of ion concentrations has been the subject of many investigations during the last few years. The results obtained have demonstrated without question the unlimited possibilities existing for laboratory and industrial applications of ion concentration measurements. It has been shown in many instances biological activity, fermentation, and filtration are influenced to a large extent by variations in the H-ion concentration. In addition, the way is open for improved control and accuracy in the many neutralization problems encountered in the laboratory. The lack of suitable electrodes has greatly retarded the practical applications of H-ion measurements to plant industrial problems. The …


The Distillation Curves Of Several Liquid Binary Stystems Of Various Aliphatic Alcohols With Benzene And Toluene, Jack Philip Eigen May 1930

The Distillation Curves Of Several Liquid Binary Stystems Of Various Aliphatic Alcohols With Benzene And Toluene, Jack Philip Eigen

Bachelors’ Theses

The object of this thesis is to determine the distillation curves of several liquid binary systems and to locate any constant boiling mixture by means of graphical representation.

Such an investigation has a commercial aspect. A research of this kind is valuable to the paint industry, and also for any industry interested in preparing very pure liquids by distillation. The following investigation limits itself to a study of. boiling point curves of mixtures of various aliphatic alcohols with benzene or toluene. These systems are reputed to have a minimum boiling which would be very valuable in the paint industry as …


An Analysis Of Pecan Nut Shells, Marie I. Bond May 1930

An Analysis Of Pecan Nut Shells, Marie I. Bond

Bachelors’ Theses

This thesis deals with the methods or analysis or pecan nut shells and an attempt to identify the extracted pigment.

At present nut shells are waste products. This makes their study interesting from a commercial standpoint. In view of the fact that very little work of this kind has been done, nut shell analysis offers interesting research problems as well as excellent practice in the technique or organic analysis.

Such great interest is now being taken in plant pigments that, a thorough investigation of the red pigment yielded by pecan nut shell would be an appreciated contribution to science.


Experiments On The Effect Of Current Density Of The Porosity Of Chromium Plated Steel, William G. Hilger May 1930

Experiments On The Effect Of Current Density Of The Porosity Of Chromium Plated Steel, William G. Hilger

Bachelors’ Theses

The application of chromium plating in industry has grown out of a series of experiments conducted in the past few years. However as early as 1854, research was carried on in this field, but it was only in the years 1920 - 1925, that the chromium plating industry became an actual fact. From then on it has progressed very rapidly. In the present day chromium is applied for two main purposes: (a) to produce a permanent and decorative effect and, (b) to prolong the life of mechanical parts subjected to unusual conditions of wear or temperature. The electrodeposition of chromium …


A Determination Of The Solubility Curves Of Several Liquid Ternary Systems And The Effect Of Change Of Temperature On These Curves, Samuel Klieger May 1930

A Determination Of The Solubility Curves Of Several Liquid Ternary Systems And The Effect Of Change Of Temperature On These Curves, Samuel Klieger

Bachelors’ Theses

The following paper treats of the solubility relations found in ternary systems. The components of the system are, the lower alcohols, Benzene or toluene and water. The work consists of a determination of the solubility curve of the three components in various proportions. The influence of temperature on the solubility is so studied.


The Amount And Identification Of Amyl Alcohols In A Commercial Mixture Of Pentanols, M. Eugenia Eberhard May 1930

The Amount And Identification Of Amyl Alcohols In A Commercial Mixture Of Pentanols, M. Eugenia Eberhard

Bachelors’ Theses

Casing head gasoline obtained from natural gas yields five commercial products. One of these is a mixture of amyl alcohols. As treated by the Sharples Company, West Virginia, pentane is separated and treated with chlorine. Three chlorine derivatives are produced. These are treated with caustic soda and may f'orm eight possible amyl· aloohols~1 The products of the normal pentane, only, are the subject matter of this thesis.


History Of Applied Geometry, Evelyn Jackson Jan 1930

History Of Applied Geometry, Evelyn Jackson

Electronic Thesis and Dissertation

Mathematics: Just what does the word mean to us? After a moment of thought many different meanings may present themselves to our minds. At first we are inclined to say that the word mathematics covers a vast field. We are justified in so thinking because mathematics embraces a wide scope of study. Were we to say that it is a science we should place it in its proper genius, for it is truly a science of numbers and space. However, could not the science be the art of calculation or the art of computation?


The Utility Of Mathematics, Jack R. Dunn Jan 1930

The Utility Of Mathematics, Jack R. Dunn

Electronic Thesis and Dissertation

No abstract provided.


History Of Applied Geometry, Evelyn Jackson Jan 1930

History Of Applied Geometry, Evelyn Jackson

Electronic Thesis and Dissertation

No abstract provided.


Geological Report Of The Shoshone Region, Idaho, Eldred R. Harrington Jan 1930

Geological Report Of The Shoshone Region, Idaho, Eldred R. Harrington

Earth and Planetary Sciences ETDs

This report sets forth the results of a five year study of the Shoshone region, Idaho. The region is situated in south-central Idaho on both sides of the Snake river. The southern and larger part of the region lies in the Columbia River Plateau province while the northern and smaller part of the area lies in the Northern Rocky Mountains province.

An areal geology map and several cross-sections accompany the report which is further illustrated by numerous photographs.


A Syllabus Of Line Geometry, Alice Willmarth Jan 1930

A Syllabus Of Line Geometry, Alice Willmarth

University of the Pacific Theses and Dissertations

In the study of advanced geometry, we shall deal with a certain important relation between pairs of figures in space, and also between their properties. There are two distinct parts to analytic geometry, the analytic work and the geometric interpretation. Two systems of geometry, depending upon different elements with the same number of coordinates, will have the same analytic expressions and will differ only in the interpretation of the analysis. In such a case it is often sufficient to know the meaning of the coordination and the interpretation of a few fundamental relations in each system in order to find …


Iron And Cobalt Salts As Catalysts In The Oxidation Of Sodium Sulfite By Free Oxygen, Loren C. Bryner Jan 1930

Iron And Cobalt Salts As Catalysts In The Oxidation Of Sodium Sulfite By Free Oxygen, Loren C. Bryner

Theses and Dissertations

The present investigation was carried out to show the catalytic effect of some iron and cobalt salts on the oxidation of sodium sulfite solutions by free oxygen. The rate of reaction was determined by measuring the volume of water required to replace the absorbed oxygen. A photograph and diagrammatical arrangement of the apparatus is given, (Page 14). From the preliminary experiments it was found that the rate of oxidation of sodium sulfite solutions is dependent upon concentration, and speed of the shaker.


A Study Of The Striated Spark By The Method Of Instantaneous Photography, Laurence L. Cruise Jan 1930

A Study Of The Striated Spark By The Method Of Instantaneous Photography, Laurence L. Cruise

Master's Theses

In 1867 Toepler found the existence of a pulse spreading from the region around the spark immediately after it had passed. Since the density of the air in the pulse differs from that of the surrounding gas, the pulse is optically different from the rest of the field and so can be made visible by the “Shadowgraph Method.” Topeler’s work was the first of its kind where an instantaneous view, say of the order of several millionths of a second, of the electric spark was obtained. IN 1926 Dr. Zinszer, while studying the life history of the electric spark by …


Revision Of The Jefferson City Formation In The Rolla Quadrangle, James Shelley Cullison Jan 1930

Revision Of The Jefferson City Formation In The Rolla Quadrangle, James Shelley Cullison

Masters Theses

"The geology of the Rolla quadrangle was mapped by Lee in 1912. At that time all the dolomitic strata above the Roubidoux and beneath the Carboniferous formations in this area were placed in the Jefferson City. A more detailed study of the stratigraphy of the whole Ozark region by Ulrich has shown that some of the strata which had been included in the Jefferson City formation on lithologic grounds are not equivalent to the dolomites in the type section at Jefferson City, Missouri"--Introduction, page [1].


A Measurement Of The Extent Of The Color-Sensitive Areas Of The Retina And Of The Wavelengths Of Light Stimulating The Respective Receptor Mechanisms, Charles A. Rinde Jan 1930

A Measurement Of The Extent Of The Color-Sensitive Areas Of The Retina And Of The Wavelengths Of Light Stimulating The Respective Receptor Mechanisms, Charles A. Rinde

University of the Pacific Theses and Dissertations

The interest of the writer was directed toward the phenomena of color vision in 1927 as a result of attending concurrently two courses in the University of California touching upon the subject, but treating it quite differently with results far from mutually consistent. Prof. R. S. Minor, in his course on physical optics, discussed color vision from the physicist’s standpoint, making use of the Young-Helmholtz theory; while Prof. G. M. Stratton gave the psychological treatment, based upon the Ladd-Franklin theory, as a part of his general psychology. Several of the more obviously points of conflict impressed the writer so strongly …


Faraday's Laws Of Electrolysis, M. Aquinas Dec 1929

Faraday's Laws Of Electrolysis, M. Aquinas

Bachelors’ Theses

Physics has no equal, perhaps, in bringing the student to an appreciation of the beauty, the order and the harmony or the universe, and thus drawing the heart and the mind to God whose unbounded powers executed the eternal and marvelous wonders that are all about us.

It is intensely fascinating to take peeps into the "laboratories of God" and wonder what will be the next secret that He will let man in on. It seems as the ages roll by He gradually allows us to share more and more in His secrets or nature; He appears to be slowly …


The Quantitative Analysis Of Sodium Acetate, Henry A. Budzinski Aug 1929

The Quantitative Analysis Of Sodium Acetate, Henry A. Budzinski

Bachelors’ Theses

There are many methods by which Sodium Acetate can be analysed for its purity. Each method is satisfactory and the results obtained vary only slightly. However, this essay is for the purpose of determining the method which is most suitable for all conditions, and setting this method as a standard.


Scholasticism An Intellectual Basis And Unifying Principle Of Modern Science, Alice V. Johnson Jul 1929

Scholasticism An Intellectual Basis And Unifying Principle Of Modern Science, Alice V. Johnson

Electronic Thesis and Dissertation

Amid the almost uninterrupted disintegration of systems during the last three centuries, the philosophy of St. Thomas has alone been able to stand the shock of criticism; it alone has proved sufficiently solid and comprehensive to serve as an intellectual basis and unifying principle for all the new facts and phenomena brought to light by modern science.


The Chromite Deposits Of Stillwater And Sweetgrass Counties, Montana, Uuno Sahinen Jun 1929

The Chromite Deposits Of Stillwater And Sweetgrass Counties, Montana, Uuno Sahinen

Bachelors Theses and Reports, 1928 - 1970

In writing this report, two objects were kept in mind, (1) to explain, if possible, the origin of the chromite deposits found in Sweetgrass and Stillwater Counties, and (2) to bring up to date all information on these deposits which had thus far been available.

The work done consisted of study of the rocks and ores of the area under the microscope, both as thin sections and as polished sections, practically all of which was done at the Montana State School of Mines, during the school year of 1928 - 1929.

The rock specimens and much information as to their …


The Cycloid, Some Related Curves And Their Derivation, Ann Downer Jun 1929

The Cycloid, Some Related Curves And Their Derivation, Ann Downer

Bachelors’ Theses

In studying the history of the cycloid and the related curves, it is interesting to note that the earliest notations and explanations were given not by a mathematician but by an artist. The description and instrumental construction of the epicycloid curve was presented in about 1525 by Albrecht Durer (1471-1528) a celebrated sculptor and painter of Nurnberg in his book "Underweysund der Messung mit dem Zyrkenund Rychtsceyd." The original idea, however, goes as far back as the time of Hipparchus, an astronomer, who used it in his astronomical theory of epicycles. This curve was now neglected until G. Desargues and …


The Constant Of Torsion Of A Given Wire, Ella M. Blunk Jun 1929

The Constant Of Torsion Of A Given Wire, Ella M. Blunk

Bachelors’ Theses

"Using a given wire, the value of n determined dynamically is generally somewhat larger than the value determined by statical method. This is due partly to the fact that a wire, under the action of a torque, does not at once acquire its final twist. The twist increases under the application of a constant torque; and therefore, during a brief application of the torque (for example, during an oscillation of heavy body attached to the wire) the torque per unit twist has larger value than when the torque is applied for a long time. " Edwin Edser

The purpose of …


Curve Tracing In Polar Coordinates, Virginia Higgins Jun 1929

Curve Tracing In Polar Coordinates, Virginia Higgins

Bachelors’ Theses

No abstract provided.


Quadratic Equations, Floyd George Hydar Jun 1929

Quadratic Equations, Floyd George Hydar

Bachelors’ Theses

In algebra, an equality which exists only for particular values of certain letters representing the unknown quantities is called an equation. These particular values are called the roots of the equation, and the determination of these roots is known as the solution of the equation.


The Cubic Equation In One Variable, Ella M. Horst Jun 1929

The Cubic Equation In One Variable, Ella M. Horst

Bachelors’ Theses

No abstract provided.


The Effect Of Carbon Dioxide Tension Upon The Ability Of Goldfish To Abosorb Oxygen At Low Tension, Thressa A. Hickman Jun 1929

The Effect Of Carbon Dioxide Tension Upon The Ability Of Goldfish To Abosorb Oxygen At Low Tension, Thressa A. Hickman

Masters Theses

Within recent years much has been contributed to our knowledge of the physiology of respiration. Van Slyke (1921) in a study of the carbon dioxide carriers of the blood concluded that hemoglobin is almost as completely responsible for the transport of CO2 in the blood as it is for the transport of oxygen. And that from 80% to 95%, sometimes possibly all, of the alkali furnished to neutralize the CO2 that enters the venous blood comes from the hemoglobin.

Powers (1922) found that species of marine fishes have an optimum pH of more or less wide range for …