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Articles 34111 - 34140 of 34506
Full-Text Articles in Physical Sciences and Mathematics
The Effect Of Metallic Fluorides On Oleic Acid At Elevated Temperatures, Lorraine W. Dupuis
The Effect Of Metallic Fluorides On Oleic Acid At Elevated Temperatures, Lorraine W. Dupuis
Bachelors’ Theses
The problem of finding the effect of metallic fluorine compounds on oleic acid at elevated temperatures was presented in connection with the thesis of J.J. Wocasek of Marquette University. Doctor Wocasek had used fluorine compounds as catalysts in a.n attempt to find a substitute for tung oil. He used the fluorides as catalysts in the esterification of glycerol with unsaturated acids.
The Molecular Weight Of Liquids In The Liquid State, Catherine O'Toole
The Molecular Weight Of Liquids In The Liquid State, Catherine O'Toole
Bachelors’ Theses
A Thesis Submitted to the Faculty of the College of Liberal Arts of Marquette University in Partial Fulfillment of the Requirements for the Degree of Bachelor of Science, Milwaukee, Wisconsin
Alkylaminoalkyl Esters Of 2-Thiophene Carboxylic And Furoic Acids, Henry Alouis Rutter Jr.
Alkylaminoalkyl Esters Of 2-Thiophene Carboxylic And Furoic Acids, Henry Alouis Rutter Jr.
Master's Theses
The association of local anesthetic activity with alkaninoalkyl ester of aromatic carbonyl acids has been well susbstantietes. Compounds obtained as varieties of the "anesthesiophoric" group are usually capable of some degree of local anesthetic activity.
Alkylaminoalkyl Aryoxyacetates, William Kenneth Easley
Alkylaminoalkyl Aryoxyacetates, William Kenneth Easley
Master's Theses
Numerous inInvestigations into the preparation, properties, and effects plant growth substances have been carried out. It has been shown that phenoxyacetic acids, napthoxyacetic acids, esters, anides and salts of phenoxyacetic acids and certain substituted products of these acids are plant growth promoting substances.
It is the purpose ot this work to produce esters of phenoxyacetic and napthoxyacetic acids which contain a secondary amino group and as a result of their ability to form acid salts, such as hydrochlorides, water soluble compounds. These compounds would be readily applicable to plants in sprays.
Heats Of Solution In Liquid Ammonia, Dorsey O. Thomas Jr.
Heats Of Solution In Liquid Ammonia, Dorsey O. Thomas Jr.
Honors Theses
The present work consists of measurements of the heats of solution of guanadine hydrocholride in this solvent. Also there will be presented a detailed description of the method of operation of the calorimeter which is being used.
Methylation Of Phenols, John James Adamzevich
Methylation Of Phenols, John James Adamzevich
Honors Theses
Although a good deal of work has been done lately on the methylation of phenols this is still a comparatively unknown field. The purpose of this investigation was to study the effect of temperature on the amount and type of product formed.
Solubility Determinations In Anhydrous Ethylenediamine, Joseph Hooker Dusenbury
Solubility Determinations In Anhydrous Ethylenediamine, Joseph Hooker Dusenbury
Honors Theses
Although the preparation of ethylenediamine is reported in the literature as early as 1853, the first isolation of the pure anhydrous compound was performed by A. W. Hoffmann in 1858. He prepared the pure diamine by repeated distillations from metallic sodium, and reported on the great stability of the 111ono-hydrate as a hindrance to obtaining the compound in a pure state, More recently, in 1934, Bailar at the University of Illinois reacted the crude diamine with zinc oxalate to give a salt which is stable at room temperature and may be heated to 200° in vacuo (all temperatures in degrees …
The Preparation Of Phenyldibromnitromethane, Edwin L. Mincher
The Preparation Of Phenyldibromnitromethane, Edwin L. Mincher
Honors Theses
The purpose of this research was to prepare plenyldibromnitromethane. Also it was desired to make some physical measurements on the compound if the compound could be made in sufficient quantity. So far as the author can find out, phenyldibromnitromethane is not described in the literature.
A Study Of The Action Of Potassium Hypobromite And Sodium Hypochlorite On Adipamide, William Marzluff
A Study Of The Action Of Potassium Hypobromite And Sodium Hypochlorite On Adipamide, William Marzluff
Honors Theses
The Hoffman reaction of an amide with a hypohalite to give a primary amine in excellent yields is the basis of many syntheses in organic chemistry. This project is concerned with the study of the action of sodium hypobromite and sodium hypochloride on adipamide. Isolation of reaction products, if possible, identification of reaction products, if possible, identification of the products, and determination of the yield of the reaction were desired. It was hope that a diamine, putresecine, would result from this reaction, and therefore the steps in isolation of the products were carried out with this in view.
A Partial Study Of The Reaction Between Pentanedione-2,4 And Formaldehyde, Joseph Anthony Sincius
A Partial Study Of The Reaction Between Pentanedione-2,4 And Formaldehyde, Joseph Anthony Sincius
Honors Theses
It was the purpose of this research to observe the reaction of pentanedione-2,4 with formaldehyde, and to study the principle reaction product. The secondary purpose of the research was, if possible, to obtain a cyclic compound like 1,3 dihydrorescrcinol.
Dialysis Of Silicic Acid Gels, Arthur C. Glamm
Dialysis Of Silicic Acid Gels, Arthur C. Glamm
Honors Theses
The primary purpose of this investigation was to prove or disprove the existence of an equilibrium between polysilicic acid molecules and simple silicic acid molecules in a set silicic acid gel. The investigation involved the controlled dialysis of typical gels from their time mixing, through the time of set and into the aging period. Since numerous silica determinations were to be made, it was thought advisable to disregard the time consuming gravimetric method. The secondary purpose of this investigation was therefore, to determine if the colorimetric method for the determination of silica, as devised by Winkler (1) in 1914 and …
Synthesis Of Terpenes, Jeanetta Reneberger
Synthesis Of Terpenes, Jeanetta Reneberger
Chemistry Honors Papers
This 16 page thesis examines the classification and preparation of terpenes.
Experiments On The Keto-Cleavage Of D1 (2-Cyanoethyl) Acetoacetic Ester, Charles W. Huff
Experiments On The Keto-Cleavage Of D1 (2-Cyanoethyl) Acetoacetic Ester, Charles W. Huff
Chemistry Honors Papers
This 12 page thesis examines effects of the addition of acrylo-nitrile to acetoacetic ester.
The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford
The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford
Theses and Dissertations
This brief discussion and research paper attempts to correlate a large portion of the information about the preparation of known organic chloroformates and carbonates, to point out the present and possible future uses of these compounds, and to contribute some information concerning the preparation of a number of the organic carbonates. A comparison of the different methods of preparation is made.
Specific Gravities And Fluidity Factors Of Glaze Slips, E. S. Amos
Specific Gravities And Fluidity Factors Of Glaze Slips, E. S. Amos
Journal of the Arkansas Academy of Science
No abstract provided.
Simple Ignition Furnaces, L. B. Roberts, J. C. Hackney
Simple Ignition Furnaces, L. B. Roberts, J. C. Hackney
Journal of the Arkansas Academy of Science
No abstract provided.
Note On The Occurrence Of D-Manitol In Native Persimmon, Irving T. Beach
Note On The Occurrence Of D-Manitol In Native Persimmon, Irving T. Beach
Journal of the Arkansas Academy of Science
No abstract provided.
Calycanthne. Distillation With Zinc Dust, Irving T. Beach
Calycanthne. Distillation With Zinc Dust, Irving T. Beach
Journal of the Arkansas Academy of Science
No abstract provided.
Lipide Stimulation Of Lactobacilli., Virginia R. Williams
Lipide Stimulation Of Lactobacilli., Virginia R. Williams
LSU Historical Dissertations and Theses
No abstract provided.
The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay
The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay
Masters Theses
"The purpose of this thesis is to provide a means of preparing highly purified samples of neodymium and praseodymium compounds when the material to be refined already exists in a state of approximate purity. The method described cannot be profitably used to purify the individual rare earths without first concentrating them. The process is not intended to be quantitative, for it is a fractional crystallization technique using a concentrated hydrochloric acid medium"--Introduction, page 1.
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
Masters Theses
"There has been a need for a rapid and an accurate method for the determination of fluorine in its compounds. Both gravimetric and volumetric methods have been studied, but both methods were time consuming or inaccurate or both. Colorimetric methods had been studied before F. Richter developed his method but none had been reported to be as satisfactory as his method. This method was investigated because it was thought that F. Richter's method would be a satisfactory colorimetric determination for fluorine in its compounds"--Introduction, page 1.
A Spectral Study Of Some Deuterated Toluenes., Charles Hooper Smith
A Spectral Study Of Some Deuterated Toluenes., Charles Hooper Smith
LSU Historical Dissertations and Theses
No abstract provided.
Crude Oil Salts In Petroleum Refining., Thomas Porter Bailey 1914-2001
Crude Oil Salts In Petroleum Refining., Thomas Porter Bailey 1914-2001
Electronic Theses and Dissertations
No abstract provided.
A Study Of The Synthesis Of 4-Chlorobutanal., Carl E. Moore 1915-2012
A Study Of The Synthesis Of 4-Chlorobutanal., Carl E. Moore 1915-2012
Electronic Theses and Dissertations
No abstract provided.
Studies In The Determination Of Iodine In Soils Organic Materials, And Waters, Russell T. Lundell
Studies In The Determination Of Iodine In Soils Organic Materials, And Waters, Russell T. Lundell
Theses and Dissertations
A summary of the literature on the nutritional value of iodine in the diet of various forms of life is given. The majority of evidence indicates that iodine is an essential element in plant and animal nutrition. It functions particularly in animal metabolism in the form of thyroxine. The occurrence of iodine in a nature has been briefly discussed. Investigations made in this regard indicate iodine to be almost universally distributed in very minute amounts. Most iodine salts are soluble in water and their distribution is affected by water movements. Results of iodine determinations made during the course of this …
The Effect Of Sodium And Potassium Ions On The Time Of Set Of Silicic Acid Gels, Orin Chester Hansen
The Effect Of Sodium And Potassium Ions On The Time Of Set Of Silicic Acid Gels, Orin Chester Hansen
Honors Theses
This paper will deal with the relative effect of the potassium and sodium ions on the time of set. To determine this effect, gels were prepared using potassium silicate in place of the sodium silicate used in the previous experiments on the effects of electrolytes in this laboratory. The heat of activation for the setting of the potassium silicate gels was determined by the method used by Hurd and Letterton (7) in which the logarithm of the time of set was plotted against the reciprocal absolute temperature, the heat of activation being computed from the slope of the resulting line …
The Effect Of Polyvalent Electrolytes On The Viscosity Of Silicic Acid Gel Mixtures, David John Gimber
The Effect Of Polyvalent Electrolytes On The Viscosity Of Silicic Acid Gel Mixtures, David John Gimber
Honors Theses
Von Weimarn has shown that the degree of supersaturation at the time of formation, and the viscosity of the medium account, qualitatively at least, for the resulting character of the precipitate from a solution, whether it be crystalline of amorphous. When fairly concentrated solutions form precipitates they are usually colloidal in nature and may even be gelatinous, or a jelly may be formed. When a precipitate, thus formed, retains an appreciable quantity of the liquid in which it was dissolved in the form of a semi-rigid mass, it is termed a “gelatinous precipitate”, and if all the liquid is initially …
Heats Of Solution In Liquid Ammonia, Merwin William Warren
Heats Of Solution In Liquid Ammonia, Merwin William Warren
Honors Theses
The present work consists in measurements of the integral heat of solution of dimethylamine hydrochloride, and its isomer, ethyl ammomium chloride, and preliminary measurements on phenyl-amine hydrochloride.
Degree Of Substitution In Ethylchlorosilanes, Charles Guare
Degree Of Substitution In Ethylchlorosilanes, Charles Guare
Honors Theses
When an organo-magnesium halide is reacted with an excess of trichlorosilane, a mixture of products results according to the equations. If phenyl magnesium bromide is used, a mixture of high boiling products results, the highest boiling point of which is approximately 250° at 14mm. pressure. If ethyl magnesium bromide is used, it may be shown that, making certain assumptions and under the conditions of the experiment, if ethyl magnesium bromide is added to the trichlorosilane, monosubstitution is promoted, whereas if the trichlorosilane is added to the ethyl magnesium bromide, polysubstitution is promoted.
Application Of The Cathode Ray Oscillograph To Polarographic Analysis, George Sidney Wooster
Application Of The Cathode Ray Oscillograph To Polarographic Analysis, George Sidney Wooster
Honors Theses
The object of this work is to devise a method of reproducing on a cathode ray oscillograph the current-voltage curves that are obtained with the Fisher Electropode, and from these curves determine directly the half-wave potentials of the elements present in a test solution. This test solution is composed of copper, lead, cadmium, and zinc ions in a supporting electrolyte of .1 normal k C1.