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Articles 69571 - 69600 of 69921
Full-Text Articles in Physical Sciences and Mathematics
The Grignard Reagents: Their Preparation, Flora Cooke
The Grignard Reagents: Their Preparation, Flora Cooke
Chemistry Honors Papers
This 14 page thesis examines various methods for the preparation of the Grignard reagent.
Chemical And Physical Considerations Of Carbohydrates, Flora Cooke
Chemical And Physical Considerations Of Carbohydrates, Flora Cooke
Chemistry Honors Papers
This 13 page thesis examines chemical and physical considerations of carbohydrates.
Some Aldehyde Condensation Derivatives Of Creatinine, Clarence England Denoon Jr.
Some Aldehyde Condensation Derivatives Of Creatinine, Clarence England Denoon Jr.
Master's Theses
When insulin, a substance which is used to reduce sugar in the blood is hydrolysed, products are obtained bearing some similarity to creatinine. Therefore, reasoning conversely, creatinine derivatives might be expected to posses as a hypo- glycemic (sugar reducing) effect.
The Brocard Points Of A Triangle, Mary Geraldine Stamm
The Brocard Points Of A Triangle, Mary Geraldine Stamm
Bachelors’ Theses
The Brocard points, two remarkable points related to a triangle, were first noticed in 1816 by August Leopold Crelle. In a paper published in Berlin, he showed how to determine a point inside a triangle, so that the angles (taken in the same order) formed by the lines joining it to the vertices are equal. Investigations were also made by Karl Friedrich Andreas Jacobi (1795-1855) of Pforta, and by some of his pupils. However, interest in these researches died out, and the matter was soon forgotten.
The Application Of Differential Equations To The Laws Of Physics, Sherman Baker
The Application Of Differential Equations To The Laws Of Physics, Sherman Baker
Bachelors’ Theses
In this treatment of the mathematical expression of physical laws, all proofs and expositions of problems that are taken from particular books are acknowledged in the text. Formulas and proofs that are given in a conventional form by authors generally and are the property of no single man are not acknowledged. Such are the alternating current equations, the Mass Action formulas, parts of the thermionic current discussion, and Fourier's equation for the flow of heat.
Some preparation in the sciences on the part of the reader is taken for granted in the presentation of the matter on this thesis. The …
A Geological Report On Several Localities Of Madison County, Montana, Hans Fritzsche
A Geological Report On Several Localities Of Madison County, Montana, Hans Fritzsche
Bachelors Theses and Reports, 1928 - 1970
The area selected for study comprises four different districts situated in Madison County, each of them showing typical geologic features: the South Boulder District, the "Montana type section of Paleozoic and Mesozoic rocks", the Mayflower District with the famous Mayflower mine, the Renova Hot Springs District as an excellent area for studying structural features, and the Silver Star Mining District with its contact metamorphic ore deposits.
A Preliminary Study Of The Micro-Fauna Of Certain Paleozoic Formations Of Montana, George Powe
A Preliminary Study Of The Micro-Fauna Of Certain Paleozoic Formations Of Montana, George Powe
Bachelors Theses and Reports, 1928 - 1970
The study of the micro-fauna of Montana formations has been almost entirely neglected. Because the petroleum industry of this state has not felt the necessity for using micro-paleontology in its sub-surface correlations, the science has been but little used. The Montana Power Company has had an examination made of some of its well cuttings by a competent micro-paleontologist who found some foraminifera in Mesozoic sediments. However, no investigations have been made to determine the presence and character of the micro-fauna of the Paleozoic formations of Montana.
The Effects Of Zinc Sulphate, Manganese Sulphate, And Iron Sulphate On The Lead Storage Cell., George A. Mccracken
The Effects Of Zinc Sulphate, Manganese Sulphate, And Iron Sulphate On The Lead Storage Cell., George A. Mccracken
Bachelors Theses and Reports, 1928 - 1970
The lead storage battery as it is used today is made up of the pasted type plates of lead dioxide, the anode, and sponge lead, the cathode, and wooden or hard rubber separators, which serve to insulate these from one another. In manufacturing these, it is desirable to keep them free from impurities.
Selenium In Proteins From Toxic Foodstuffs, Edgar Page Painter
Selenium In Proteins From Toxic Foodstuffs, Edgar Page Painter
Electronic Theses and Dissertations
The importance of the selenium problem has been established. Knight (1) in an address before The Association of Official Agricultural Chemists summarized the progress made on the problem, conservatively emphasized its importance, and stressed the need for extensive research. It is a paramount problem not only in South Dakota, but in many other states as well.
An Application Of A Theorem Of Borel On Natural Boundaries To The Theta-Zero Functions And Analogous Functions, Louis William Tordella
An Application Of A Theorem Of Borel On Natural Boundaries To The Theta-Zero Functions And Analogous Functions, Louis William Tordella
Master's Theses
No abstract provided.
Foundations Of Differential Geometry., Frank Atkinson Rickey
Foundations Of Differential Geometry., Frank Atkinson Rickey
LSU Historical Dissertations and Theses
No abstract provided.
Parabolic Curves, M.J. Berchmans Gentinetta
A Contribution To The Preparation Of Synthetic Rubber From Butyl Alcohol, Rosalia Aloisia Leutgoeb
A Contribution To The Preparation Of Synthetic Rubber From Butyl Alcohol, Rosalia Aloisia Leutgoeb
Bachelors’ Theses
Rubber, on account of its almost universal usefulness is one of the important materials of modern time. The unequalled utility of it is found in its physical properties, such as elasticity and toughness, which are not possessed by other plastic substances.
Some Contributions To Iodometric Technique, Justin Kimber Dyche
Some Contributions To Iodometric Technique, Justin Kimber Dyche
University of the Pacific Theses and Dissertations
Analysis is a very important branch of chemistry, for it is such a practical part of the science. Analysis is itself divided into two parts. Qualitative analysis discovers what things are present in the material in question. Quantitative analysis then determines how much of each ingredient is present. This thesis considers a limited section of quantitative analysis.
This thesis deals with the use of iodine in volumetric analysis, which is called either iodimetry or iodometry. In this type of analysis, the iodine is used in solution and reacts with some other material, also in solution, and takes up electrons. That …
Geology And Ground Water Resources Of Burke, Divide, Mountrail, And Williams Counties In North Dakota, Andrew G. Alpha
Geology And Ground Water Resources Of Burke, Divide, Mountrail, And Williams Counties In North Dakota, Andrew G. Alpha
Theses and Dissertations
No abstract provided.
The Important Lines In A Triangle, Jane Bogiel
The Important Lines In A Triangle, Jane Bogiel
Bachelors’ Theses
Geometry, as one of the fields of Mathematics, has been the object of extensive studies in ancient, Greek times, as well as in modern times, times of revival of scientific interests and researches. Analytical, descriptive, and projective geometry has been introduced as means of symplifying the study of the relations of different geometrical elements. Consequently, pure geometrical methods have been almost altogether abandonned, and, it is only in introducing basic geometrical concepts that they are now used. --This, however, seems to be the only reasonable course as long as the new methods do not change the basic structure of the …
Effect Of Varying Supports On Nickel As A Catalyst In The Hydrogenation Of Unrefined And Refined Soy Bean Oil, Nate W. Fredman
Effect Of Varying Supports On Nickel As A Catalyst In The Hydrogenation Of Unrefined And Refined Soy Bean Oil, Nate W. Fredman
Bachelors’ Theses
Hydrogenation is a subject that has grown in importance only within the last thirty years. Before 1900, little was known about the process of adding hydrogen to a liquid oil to form a solid fat, the latter of which has a great deal more uses than the former. Much trouble was experienced, since conditions controlling the process must be very definite in order to obtain good results.
Chemists have found that the main requisite in the above process is the catalyst. It must be very carefully prepared and controlled. But instead of using only the catalyst, many modern research workers …
A Comparison Of I.Q. And Achievement In Plane Geometry Among Students In The Senior High School At Joplin, Missouri, Vivian L. Hummer
A Comparison Of I.Q. And Achievement In Plane Geometry Among Students In The Senior High School At Joplin, Missouri, Vivian L. Hummer
Electronic Theses & Dissertations
No Abstract
Investigations Concerning Bentonite Deposits Near Ramsay, Montana, Anton A. Anjel, John F. Sullivan
Investigations Concerning Bentonite Deposits Near Ramsay, Montana, Anton A. Anjel, John F. Sullivan
Bachelors Theses and Reports, 1928 - 1970
The purpose of Part I of this report is to determine the origin of the bentonite deposits, also to locate them with reference to section corners in the vicinity and to determine their extent.
The field work for this report was done in the fall of 1933 and during the spring of 1934. The roads, geologic contacts, and culture in general were mapped with the use of an open sight alidade and plane table. Distances were determined on the roads by the speedometer on the automobile; the detailed survey in the immediate vicinity of the deposits was done with use …
Supergene Enrichment Of Silver Ores With Special Reference To Those From Neihart, Montana., Thomas Walker Page
Supergene Enrichment Of Silver Ores With Special Reference To Those From Neihart, Montana., Thomas Walker Page
Bachelors Theses and Reports, 1928 - 1970
In the development of a technique it was necessary to learn the fundamentals of ore microscopy as applied to the various minerals of silver, which included the use of reflected polarized light, etch reactions, microchemical analysis, and sight recognition of mineral. In addition it was necessary to become familiar with the accepted criteria of sequence, replacement, and other textural phenomena.
Geology And Ore Deposits Of The Butte-Highland Gold Mine., Stockton Veazey Jr.
Geology And Ore Deposits Of The Butte-Highland Gold Mine., Stockton Veazey Jr.
Bachelors Theses and Reports, 1928 - 1970
The Butte-Highland mine is situated at the head of Basin Creek, in the Highland mining district, Silver Bow County, about 14 miles south of Butte. The tunnel portal and present surface plant are at an elevation of about 7350 feet above sea level, facing westward across the head of Basin Creek valley. The "ghost" mining town of Highland lies a mile to the east, near the forks of Fish Creek. Access to the mine is obtained at present from Beaudine's siding, 12 miles west. The property may also be reached, with difficulty, over poor roads from Limekiln hill, or from …
Preliminary Floatation Tests On The Beneficiation Of A Low-Grade Montana Bituminous Coal., William Packwood Given
Preliminary Floatation Tests On The Beneficiation Of A Low-Grade Montana Bituminous Coal., William Packwood Given
Bachelors Theses and Reports, 1928 - 1970
Coal is an aggregation of vegetal matter with varying small amounts of mineral and animal matter which have been so changed by the processes of sedimentation, decay and metamorphism that it has become a dense, dark, combustible substance. It occurs in beds varying in thickness from one foot or less to over 300 feet. The horizontal extent of a bed is sometimes continuous over an area as large as the State of Montana.
Auriferous Tertiary Gravels Near Rocker, In Silver Bow County, Montana, William C. Mclaughlin
Auriferous Tertiary Gravels Near Rocker, In Silver Bow County, Montana, William C. Mclaughlin
Bachelors Theses and Reports, 1928 - 1970
Between the villages of Rocker and Silver Bow, in southwestern Montana, are found an interesting group of placers. Gold occurs in Tertiary gravel beds that are interstratified with beds of rhyolitic volcanic ash. With the aid of a plane table and open-sight alidade, a small portion of the lake-bed area near Rocker was mapped; all distances were paced, but numerous checks assure a fairly accurate map.
The Age-Hardening Of Duralumin, Allison Richard Dyer
The Age-Hardening Of Duralumin, Allison Richard Dyer
Bachelors Theses and Reports, 1928 - 1970
The development of wrought alloys of aluminum to which high strength and ductility can be imparted by heat treatment began with the work of Wilm and Claesser in Germany, 1905-1911. During this time an alloy was developed which was later commercially produced in that country under the tradename of duralumin. The need for strong, light alloys for aircraft during the World War greatly hastened the development of duralumin.
Ammoniacal Sulphate Leach Of Ananconda Zinc Calcine Recovery Of The Zinc By Electrolysis., Authur Jewett Bovee Jr.
Ammoniacal Sulphate Leach Of Ananconda Zinc Calcine Recovery Of The Zinc By Electrolysis., Authur Jewett Bovee Jr.
Bachelors Theses and Reports, 1928 - 1970
Zinc is produced from ores by two general methods, distillation and electrolysis.
The general principles involved in the electrolytic zinc process of today were known as far back as 1880. Difficulties encountered in purifying the solution for electrolysis and lack of suitable mechanical apparatus were the main reasons that such a long time elapsed before the process was used to produce zinc in commercial quantities.
Precipitation Of Gold, Silver, And Copper From Cyanide Solutions On Activated Charcoal., Rayworth Francis Howe
Precipitation Of Gold, Silver, And Copper From Cyanide Solutions On Activated Charcoal., Rayworth Francis Howe
Bachelors Theses and Reports, 1928 - 1970
Charcoal has been known for a considerable length of time to have the property of recovering gold, silver, and copper from cyanide solutions of these metals. Quantitative data that may shed light on the mechanism of the removal of these metals is very limited except that charcoal in a form known as activated has the power to abstract gold and silver in considerable quantities from the above solutions.
The Effect Of Impurities On The Electrodeposition Of Zinc From Zinc Sulfate Solution Containing Antimony., Emmitt L. Klebba
The Effect Of Impurities On The Electrodeposition Of Zinc From Zinc Sulfate Solution Containing Antimony., Emmitt L. Klebba
Bachelors Theses and Reports, 1928 - 1970
It has been proven by research and years of experience, that before electrolytic zinc is possible, the electrolyte, as zinc sulfate solution must be prepared as pure as is economical. In other words, the ideal electrolyte must only be a solution of one metal - zinc. Every other metal and carbon must be excluded if good recovery and a firm deposit is to be obtained.
Alloys Of Lead And Tellurium, Ettore A. Peretti
Alloys Of Lead And Tellurium, Ettore A. Peretti
Bachelors Theses and Reports, 1928 - 1970
Prior to the last few years little practical use was made of the element tellurium, which is obtained from gold and silver tellurides and from the slimes of electrolytic copper refineries. Lately, however, more study has been made of its properties when alloyed with other metals. It was the purpose of this thesis to study the effects of the addition of tellurium to lead, particularly in small amounts.
Conodonts From The Quadrant Shales Of Montana, Don R. Cubbage
Conodonts From The Quadrant Shales Of Montana, Don R. Cubbage
Bachelors Theses and Reports, 1928 - 1970
Conodonts have not been known to exist in Montana prior to the discovery of the specimens discussed and described in this paper. With this fact in mind, the author has endeavored to correlate the species of seven genera found in the Quadrant formation of Montana with similar micro-organisms from other North American areas.
The Sine-Function, Audrey Siehr
The Sine-Function, Audrey Siehr
Bachelors’ Theses
Since the sine function is one of the most important elements of that phase of mathematics known as Trigonometry, it is only proper that we pause a moment for a short explanation of that subject. Trigonometry originated with the Greeks as the name itself implies. It was derived from the two Greek words trlgonon, meaning triangle; and metria, meaning measure. Trigonometry, then, dealt with problems related to measuring triangles.