Physical Sciences and Mathematics Commons^™

The Picric Acid Method Of Sugar Determinations As Applied To Solutions Containing Maltose And Lactose, John J. Hennecke

Bachelors’ Theses

Lewis and Benedict based their method of sugar determination upon the reaction which takes place when a glucose solution is heated with a few C.C. of picric acid to which a small amount of alkali has been added.

The Oxidation Of Mineral Oils And The Effect Of Positive And Negative Catalyst On The Oxidation Process, Arthur John Sherburne

Honors Theses

Although the readiness with which petroleum oils oxidize when exposed. to heat and air is well-known, and a great many so-called "service and "sludging" tests have been devised to ascertain and predict empirically, the value of oils when put to use as lubricants in automobiles, turbines, etc., or in transformers and condensers as heat absorbers and dielectric, little has been known of the chemistry of the oxidation of oil and of the quantitative effect on this oxidation of various catalytic substances. An ever increasing interest in petroleum chemistry can be noted by a reference to the literature of the past …

Equilibrium In The System Calcium, Calcium Hydride, Hydrogen, Douglas Small

Honors Theses

Moissan first showed in a qualitative way that hydrogen and calcium form a combination which is very little dissociated below 700 degrees C. He also showed that this compound can be expressed by the chemical formula CaH2 and seemed to be a well defined compound. Gautier makes a statement that calcium hydride begins to dissociate as soon as the hydrides of strontium and barium (about 675 degrees C.) Moldenhauer and Roll-Hansen made a systematic study of the dissociation from 780 degrees C. to 1027 degrees C. These workers point out that the equilibrium pressures may be masked by the action …

Selenium Sulfide -- A New Detector For Mercury Vapor, Birger Wilhelm Nordlander

Honors Theses

A new indicator for mercury vapor of extremely high sensitivity has been found; indeed, there seems to be practically no lower limit to the concentration that can be detected. This method is based on the reaction between active selenium sulfide and the vapor. The selenium sulfide is applied as a coating to paper and the coated paper is blackened on exposure to the air containing mercury vapor, the degree of blackening being a function of time of exposure, concentration of the mercury and other factors, which can be definitely controlled. Apparatus has been developed by means of which it is …

The Solubility Of Solid Paraffin In The Lower Molecular Weight Hydrocarbons, Paul Weber

Masters Theses

"In the process of oil refining, a certain fraction of distillate from the crude oil composes the so-called wax distillate fraction from which is obtained the various lubricating oils. But the presence of the waxes and solid paraffins in these oils is very undesirable as they possess no lubricating qualities. Consequently, they must be removed from this wax distillate before the oil can be marketed"--Introduction, page 1.

A Study Of Triboluminescence, George David Read

Honors Theses

The study of triboluminescence, a phenomenon of no great practical value at the present time, is representative of a class of phenomena which scientists choose to call “cold light” and whose cause has for many years been without satisfactory explanation. Because of the fact that no use has been found for the action which brings about this production of light very little work has been done to determine, quantitatively, any facts regarding it, and we have only a few theories which have been advanced without sufficient experimental data to prove any of them. Hence, this work was undertaken with only …

A Direct Reading Ionization Gauge For Pressure Measurement, A Calibration Of Standard Radio Tubes As Ionization Gauge, And A Determination Of The Vapor Pressure Curve For Solid Titanium Tetrachloride, Neil B. Reynolds

Honors Theses

.The work to be described in the following pages falls naturally under three distinct headings, and will, therefore, be taken up into three separate sections.

The work on the Direct Reading Ionization Gauge as performed under the direction of Mr. C. G. Found of the General Electric Research Company and is the subject of a paper by him and the author now in the hands of the editors of the Journal of the Optical Society of America and Review of Scientific Instruments. The remainder of the work reported here was done by the author at the Research Laboratory of the …

A Study Of The Electrical Conductivity Of Glass, William Worden Day

Honors Theses

This work was undertaken with the view of finding the alternating-current resistance of a specimen of soda-lime glass, and of determining how it changes with time, temperature, and amount of current passed. In all runs, we have restricted our work to the case of a one to one replacement of sodium ions for sodium ions by using a fused mixture of sodium-nitrate and sodium-nitrate as the electrolyte which makes contact to each side of the glass. Electrodes of both platinum and nickel were used to make contact with the fused salts.

The Evaporation Of Pyroxylin Solvents And Non-Solvents And The Effect Of Dissolved Pyroxylin On Various Types Of Evaporation Curves, Herbert Heinrich

Bachelors’ Theses

In 1833 Braconnot described a body which he called Xyloidine. This material was obtained by the action of nitric acid on starch. In 1838 Pelonze produced a similar body by treating paper with nitric acid. Although these experiments were conducted several years before those of Soh8nbein, yet we give Schonbein the honor of priority because of bis extensive studies on the new compound "ex­plosive cotton wool". The material was produced by the combined action of nitric and sulphuric acids on cellulose. A patent was granted to him in the United States December 5, 1846, but little attention was paid to …

A Study Of The Preparation And Properties Of Some Metallic Soaps, Charley George Hagan

Bachelors’ Theses

Soap may be defined as the sodium or potassium salt of the acids that are found in fats. The metallic soaps are those soaps or salts of the metallic bases other than sodium or potassium. The Study of the preparation, properties and uses of metallic soaps is rather an old one, most of the research along that line being done during the last quartile of the nineteenth century. Nothing of any importance has been done of late years in this field of research. Nearly all the work has been done by foreign investigators. The metallic soaps of oleic acid are …

Studies Of Tungsten Hexachloride, Arthur Andrew Vernon

Honors Theses

The purpose of this thesis is to give a summary of the work done in studying the equilibrium conditions and rate of reaction of the compound tungsten hexachloride, together with some of its applications to the elimination of spots in coiled filaments. Tungsten hexachloride is a purple colored crystalline compound formed by passing chlorine over red hot tungsten in a tube from which all the air has been washed. It is rather unstable at room temperature in the presence of moist air, forming an oxychloride formula WoCl4 and then decomposing into tungsten oxide into the formula WO3 and the vapor …

A Study Of The Equilibrium Between Lead, Lead Iodide And Iodine, William Worden Day

Honors Theses

Although considerable work was done in 1924 by N. B. l Reynolds on the equilibrium between Lead, Lead Iodide and Iodine, there is, at the present time, no accurate data as to vapor pressure of Iodine over Lead Iodide at various temperatures. The same is likewise true of almost all metal halides and this work was undertaken to get such data as could be computed 1 by direct pressure measurements. The fact that these vapors are very corrosive makes it impossible to use a McLeod gauge or any other common form of manometer to measure the pressure directly.

A Study Of The Process Of Electrical Conduction In Films Of India Ink, Henry Adolph Letteron

Honors Theses

The grid leak used in radio engineering often is an ink film. Is it used as a path of escape of electrons from the grid. This path is necessary, for electrons collect on the grid and cause it to become negatively charged. Since a vacuum tube will not function unless the grid is charged positively with respect to the filiament, the necessity of the grid leak is obvious. The rate of absorption of electrons by the grid, and of their removal by the grid leak can be controlled to a certain extent by varying this grid leak resistance.

The Sugar Content Of Blood, Ben King Harned

Masters Theses

Summary and Conclusions:

1 We have shown that the picric acid methods are not accurate.

2. We have shown that the titrimetric methods are not adapted to clinical use.

3. We have demonstrated that the Folin-Wu method, which gives the same results

as the titrimetric methods, and is the most accurate method used in clinics,

gives results approximately 15 per cent too high, because of interfering

substances.

4. We have developed a mercuric nitrate method, specific for blood sugar by

virtue of the fact that it precipitates interfering substances before making the

determination.

5. We have developed an acetone method, …

A Study Of The Reactions Of The Sulphies Of The Tin Group With Hydrochloric Acid And In Non-Aqueous Solutions, Charles Bernard Cannon

Bachelors’ Theses

Arsenic, antimony, and tin constitute the so-called tin group, a subdivision of the hydrogen sulphide, or second group, in qualitative analysis.

The Equilibrium Between Lead, Lead Iodide And Iodine, Neil Bailey Reynolds

Honors Theses

The fact of the instability of lead iodide at moderately high temperatures is well known. This work was undertaken in order to discover, if possible, the degree of dissociation, its change with the temperature, and to collect any other important facts connected with the equilibrium.

Methods In Determinative Minerology, Ruth Hespenheide

Chemistry Honors Papers

This 11 page thesis examines various schemes for determining minerals.

The Disintegration Of Refractory Brick By Carbon Monoxide, Wilbur J. Darby

Masters Theses

"In experimental work carried on at East St. Louis, Illinois in 1916 and 1917, with a furnace of commercial size for the electrothermic dry distillation of zinc ores, a difficulty that developed was the destruction of the firebrick lining in certain parts of the large condenser. The condenser was satisfactory in other ways, yielding a large proportion of the zinc as liquid metal, with no blue powder; but in order to obtain a proper length of service from the condenser it became necessary to find and overcome the cause of the disintegration of the lining ... it will be evident …

Glucose From Corn Cobs, Barney Nudelman

Masters Theses

"The efforts of American chemists in recent years have been devoted largely to the utilization of our waste products...Corn cobs offer a particularly inviting field for research along this line on account of the large supply of cobs available and the variety of substances obtainable from them. One of the leaders in this branch of investigation is Dr. F. B. LaForge of the Chemistry Division of the Bureau of Agriculture, who has contributed numerous papers on the subject. In one of these, in collaboration with C. S. Hudson, he describes, among other things, the preparation of glucose, but recognizes the …

Quantitative Analysis (Gravimetric), L. Arthur Walton

Chemistry Honors Papers

This 24 page thesis examines the determination of various compounds using gravimetric analyses.

Volumetric Chemical Analysis, Beatrice Brooks

Chemistry Honors Papers

This 20 page thesis illustrates various methods of volumetric processes.

Methyl Amines From Carbinol And Ammonium Chloride, Arthur Mark Howald

Masters Theses

"During the spring of 1919 we undertook to prepare tri-methyl-amine for the Research Department of the Eastman Kodak Company in the Industrial Chemistry Laboratory of the Missouri School of Minds. According to V. Merz and K. Gasiorowski the three methyl amines were qualitatively proven to be present in the reaction products obtained by heating methyl alcohol, ammonia and zinc chloride to 220°C. in a bomb for fourteen hours. As these raw materials are inexpensive we attempted to prepare the tri-methyl-amine by this reaction employing for the purpose a small industrial autoclave. Methyl amines were obtained by the yield especially of …

The Chemistry Of Nitrogenous Food Stuffs, Emma M. Schweigert

Chemistry Honors Papers

This 18 page thesis contains analyses of various nitrogenous foods.

Non-Nitrogenous Foods, Edna M. Boyd

Chemistry Honors Papers

This eight page thesis discusses the chemical compositions of various non-nitrogenous foods.

The Chemistry Of Selected Food Stuffs And Condiments, Leslie F. Rutledge

Chemistry Honors Papers

This 17 page thesis discusses the composition of various foods, including milk, butter, bread and wine.

A Chemical Study Of The Enrichment Of Copper Sulfide Ores., John Dustin Clark

UNM Bulletins

The author reports on the results of sixty experiments on processes related to the enrichment of the sulfide ores of copper. Also submitted to Leland Stanford Junior University toward the Degree of Doctor of Philosophy.

Some Phenomena Which Accompany The Electrolysis Of Certain Salt Solutions, When The Electrodes Are Physically Separated By Means Of A Diaphragm Of Solid Gelatine, Containing The Same Salt As Is Used For The Electrolyte: A Study Of The Automatic Termination Of The Electrolysis, When Conducted Under The Above Conditions, Ernest Carl Wagner

Chemistry Honors Papers

This 22 page thesis is a record of work done during the summer of 1910, by Dr. W. H. Stoner, and during the summer of 1912 and the spring of 1914, by the writer, in the Chemical Laboratory of the Medico-Chirurgical College of Philadelphia.

Portland Cement, Asphalts And Bitumens, George R. Ensminger

Chemistry Honors Papers

This 37 page thesis classifies and analyzes cements, rock asphalt and bitumen.

Estelle Angier Science Notebook, M. Estelle Angier

Scrapbooks

1914 science notebook of Estelle Angier (Class of 1914). Class notes, descriptions of experiments, and conclusions. Angier added an additional note at the end of the notebook in 1971.

The Detection Of Poisons, Lloyd S. Cassel

Chemistry Honors Papers

This 29 page thesis examines methods to determine the presence of various classes of poisons.