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Articles 288751 - 288780 of 292687
Full-Text Articles in Physical Sciences and Mathematics
A Study Of The Effects Of The Chloride Ion On The Lead-Silver Anodes And On The Lead Tenor Of The Zinc Deposit In Zinc Electrolysis, William A. Mitchell
A Study Of The Effects Of The Chloride Ion On The Lead-Silver Anodes And On The Lead Tenor Of The Zinc Deposit In Zinc Electrolysis, William A. Mitchell
Bachelors Theses and Reports, 1928 - 1970
The electrolyte used in the commercial production of electrolytic zinc from zinc sulphate solutions contains small amounts of impurities each of which has its own effects upon the process. Impurities such as antimony, cobalt, nickel, and iron tend to lower the current efficiency while other impurities such as chlorine, fluorine, and nitrates tend to increase the corrosion of the lead anodes and thereby increase the lead tenor of the zinc deposit.
The Effect Of Germanium On The Current Efficiency In The Electrolysis Of Pure Zinc Sulfate Solution, Keith R. Bock
The Effect Of Germanium On The Current Efficiency In The Electrolysis Of Pure Zinc Sulfate Solution, Keith R. Bock
Bachelors Theses and Reports, 1928 - 1970
It has long been recognized that electrolytic zinc cells are extremely sensitive to impurities. In fact, certain impurities present in amounts as low as 0.1 mg/1 cause a serious loss of current efficiency. Also, the presence of several impurities in the electrolyte may accelerate the detrimental effect of each impurity.
Metal Dust Production, James H. Foreman
Metal Dust Production, James H. Foreman
Bachelors Theses and Reports, 1928 - 1970
The object of this thesis is to study the production of metal dust by direct application of a mechanical force to a stream of molten metal.
The Decomposition Of Calcium Tungstate And Synthetic Scheelite With Hydrochloric Acid, Robert R. Beebe
The Decomposition Of Calcium Tungstate And Synthetic Scheelite With Hydrochloric Acid, Robert R. Beebe
Bachelors Theses and Reports, 1928 - 1970
The decomposition of scheelite with hydrochloric acid was studied under conditions of variable acid concentration, time and temperature. The reactions were traced by weighing material untransformed and, in some cases, by analyzing the transformation products.
The Precipitation Of Calcium Tungstate From Sodium Tungstate Solution, Martin E. Messner
The Precipitation Of Calcium Tungstate From Sodium Tungstate Solution, Martin E. Messner
Bachelors Theses and Reports, 1928 - 1970
In view of the great need for tungsten in the present industrial world it is necessary that all known tungsten sourves be utilized to the greatest possible extent. Scheelite ores promise to be an increasingly important source of tungsten, inasmuch as the discovery of vast new deposits has been made and known deposits of high grade ores have practically been depleted.
The Indium-Mercury Constitutional Diagram, Bert E. Lake
The Indium-Mercury Constitutional Diagram, Bert E. Lake
Bachelors Theses and Reports, 1928 - 1970
Whenever metals differ greatly in electropositivity, intermetallic compounds are likely to form in preference to solid solutions. 21ercury and indium show a considerable difference in electropositivity. This would indicate that intermetallic compounds may play an important role in the constitutional diagram for the mercury-indium system.
The Effect Of Manganese On The Age Hardening Of Aluminum-Copper Alloys, Keith P. Burgess
The Effect Of Manganese On The Age Hardening Of Aluminum-Copper Alloys, Keith P. Burgess
Bachelors Theses and Reports, 1928 - 1970
It is known that age-hardening occurs in alloys of the solid solution type containing a hardening constituent, of a metal or metallic compound which is more soluble in the solvent phase at higher tempertures than at lower temperatures.
Cyclization Of W-Tertiary Butyl Uramido Benzoic Acid, John R. Lovett
Cyclization Of W-Tertiary Butyl Uramido Benzoic Acid, John R. Lovett
Chemistry Honors Papers
This 13 page thesis investigates the cyclization of w-tertiary butyl uramido benaoic acid and establishes the equation for the resulting reaction.
Geology Of The Mcrae Canyon Area Sierra County, New Mexico, Hugh P. Bushnell
Geology Of The Mcrae Canyon Area Sierra County, New Mexico, Hugh P. Bushnell
Earth and Planetary Sciences ETDs
Sedimentary Rocks exposed at the surface in the low area between the north-trending Caballo and Fra Cristobal Mountains of south-central New Mexico include the late Cretaceous Mesaverde formation, the late Cretaceous and early Tertiary McRae formation, and the Miocene-Pliocene Santa Fe formation. A thin veneer of Jordana pediment gravel covers the older rocks on the eastern edge of the area.
A Study Of The Beneficiation Of Low-Grade Domestic Chromite, Darrell Edward Bodie
A Study Of The Beneficiation Of Low-Grade Domestic Chromite, Darrell Edward Bodie
Bachelors Theses and Reports, 1928 - 1970
Chromite, a strategic mineral, is being consumed in ever increasing quantities in the United States today. Although the United States imports practically all of the chromite that is being consumed, it is gradually becoming necessary to exploit the low-grade deposits that are located within the United States, and also the low-grade deposits of Canada.
Group-Phase Velocity Demonstrator, Robert Katz
Group-Phase Velocity Demonstrator, Robert Katz
Robert Katz Publications
The speed with which the concepts of group velocity, phase velocity, and beats are grasped, integrated, and retained can be materially aided with the following simple demonstration apparatus.
Geologic Dating And The Time Scale Of The Ice Age, H. E. Wright Jr.
Geologic Dating And The Time Scale Of The Ice Age, H. E. Wright Jr.
Journal of the Minnesota Academy of Science
No abstract provided.
Cosmic Radiation And Radio-Carbon Age Determination, Leland S. Bohl
Cosmic Radiation And Radio-Carbon Age Determination, Leland S. Bohl
Journal of the Minnesota Academy of Science
No abstract provided.
A Simple Apparatus For Demonstrating Bernouli's Principle, G. M. Wissink
A Simple Apparatus For Demonstrating Bernouli's Principle, G. M. Wissink
Journal of the Minnesota Academy of Science
No abstract provided.
Heavy Rains Show Need For Soil Conservation Practices, G H. Burvill
Heavy Rains Show Need For Soil Conservation Practices, G H. Burvill
Journal of the Department of Agriculture, Western Australia, Series 3
Autumn 1953 will stand out in the weather records for the widespread heavy rains in the pastoral areas and wheatbelt. The rains which came from the cyclonic storms of March 22-25, totalled five to 12 inches in many pastoral areas and two to seven inches in the Northern and Eastern Wheatbelt. The steady rain soaked the land, but where the falls were heaviest, runoff to lower parts caused flooding and local inconvenience. All in all, it was a very welcome rain, especially where the previous winter had been dry. In the wheatbelt, ploughing and cultivation were soon in full swing …
Effect Of Bicarbonate Ion And Root Aeration On Lime-Induced Chlorosis, Willard L. Lindsay
Effect Of Bicarbonate Ion And Root Aeration On Lime-Induced Chlorosis, Willard L. Lindsay
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Chlorosis in plants has been recognized as a devastating disease for over one-hundred and fifty years. It is easily recognized by a yellowing of the plant foilage and is associated with a reduced chlorophyll synthesis.
Chlorosis is found so frequently on calcareous soils that its cause is attributed at least in part to this soil factor. It is therefore referred to as lime-induced chlorosis. This type of chlorosis has become a serious problem, especially in many of the fruit-growing regions of Europe and the Western United States where the soils are calcareous. In Utah the disease is more destructive than …
A Petrographic Analysis Of The Basal Member Of The Kootenai Formation, Frank E. Coupal
A Petrographic Analysis Of The Basal Member Of The Kootenai Formation, Frank E. Coupal
Bachelors Theses and Reports, 1928 - 1970
The basal member of the Kootenai formation in southwestern Montana is typically a fine to medium-grained "salt and pepper" sandstone and chert-pebble conglomerate. The section between Delpine, Montana, and Melrose, Montana, generally thickens and markedly coarsens to the West.
The Benefication Of A Low-Grade, Montana Scheelite Ore, Walter G. Parker
The Benefication Of A Low-Grade, Montana Scheelite Ore, Walter G. Parker
Bachelors Theses and Reports, 1928 - 1970
The increasing importance of tungsten as an industrial metal and the recent discoveries of extensive deposits of low-grade tungsten ores in Montana led to the investigation which is reported in this paper. The purpose of this investigation was to determine if a saleable concentrate could be obtained from one of these low-grade, Montana scheelite ores.
The Determination Of Chlorine In Alkyl Chlorobenzoates To Establish Their Identity And Purity, Clifford R. Berres
The Determination Of Chlorine In Alkyl Chlorobenzoates To Establish Their Identity And Purity, Clifford R. Berres
Bachelors’ Theses
Four years ago an investigation began at Marquette University with the purpose of determining the value of alkyl chlorobenzoates as derivatives for alcohols in characterization work. The outcome of this initial investigation was the preparation of thirty compounds previously unreported in the literature, namely, the methyl through decyl, nonyl excepted, ortho- and para-chlorobenzoates, and 2,4 and 3,4 dichlorobenzoates. The method of preparation and physical constants of these compounds were determined by Mr. Robert Johnson who presented a thesis on the "Preparation of Alkyl Chlorobenzoates and Their Application as Alcohol Derivatives" in June, 1949.
A continuance of this investigation was undertaken …
Geology Of The Rendezvous Peak Area, Cache And Box Elder Counties, Utah, Robert L. Ezell
Geology Of The Rendezvous Peak Area, Cache And Box Elder Counties, Utah, Robert L. Ezell
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This thesis presents the results of a geologic investigation of the Rendezvous Peak area, Cache and Box Elder Counties, Utah (Figure 1). The area lies between the Bear River Range on the east and the Northern Wasatch Mountains on the west (Figure 2). It is south of Cache Valley in which Logan, Utah, is located and north of Ogden Valley, east of the Wasatch Range near Ogden, Utah.
The Rendezvous Peak area is centrally located in a little known and critical area between the Logan Peak syncline in the Bear River Range and the more complex structures in the Wasatch …
The Reaction Of Some Sodium Salts Of Fatty Acids And Benzoic Acid With Α-Bromobenzyl Cyanide, Richard W. Perkins
The Reaction Of Some Sodium Salts Of Fatty Acids And Benzoic Acid With Α-Bromobenzyl Cyanide, Richard W. Perkins
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Fife (4) and O'Shaughnessy (12) have made a series of di-esters by allowing the sodium salts of various fatty acids to react with ethyl monochloracetate according to the following equation:
RCO2Na ≠ ClCH2CO2C2H5 ---------> RCO2CH2CO2C2H5 ≠ NaCl .
The mechanism of the reaction appears to be ionic and to involve the attack of an RCO2- ion on the carbon atom to which the chlorine atom is attached. As the RCO2- approaches this carbon atom the chlorine atom moves …
Test 491: Mccormick Super W-4, Nebraska Tractor Test Lab
Test 491: Mccormick Super W-4, Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
Test 492: Farmall Super H, Nebraska Tractor Test Lab
Test 492: Farmall Super H, Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
The Preparation Of The Heavy Metal Soaps Of Naphthenic Acids, Frederick H. Owens
The Preparation Of The Heavy Metal Soaps Of Naphthenic Acids, Frederick H. Owens
Chemistry Honors Papers
This 13 page thesis examines the preparation of heavy metal soaps from purified naphthenic acids.
Test 490: John Deere Model 60 (All Fuel), Nebraska Tractor Test Lab
Test 490: John Deere Model 60 (All Fuel), Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
An Azimuth-Stabililzed Balloon Platform, Alfred H. Spano
An Azimuth-Stabililzed Balloon Platform, Alfred H. Spano
Physics & Astronomy ETDs
In the study of Zodiacal Light, an interesting task is the determination of the intensity and the position of this glow on the celestial sphere. The problem of photographing this phenomenon from the earth’s surface has been hampered generally by the inevitable presence of the atmosphere between the camera and the object. However, it is expected that at the height of some thirty kilometers above the earth, the atmospheric haze will be reduced enough so that pictures of the zodiacal region may be obtained without significant absorption. To accomplish this, it is necessary to keep the balloon-borne camera pointed in …
Use Of A Simple Blowing Device To Facilitate Inspection Of Wheat For Internal Infestation, Max Milner, E. P. Farrell, Robert Katz
Use Of A Simple Blowing Device To Facilitate Inspection Of Wheat For Internal Infestation, Max Milner, E. P. Farrell, Robert Katz
Robert Katz Publications
Enforcement of sanitary practices in the commercial handling of wheat, particularly with reference to insect infestation, requires a method of inspection of wheat for internal or hidden insect infestation which is reliable, yet rapid enough for routine use. A number of inspection methods have been developed for this purpose, and a review has been published (1) of those proposed up to two years ago. A rigorous evaluation of several of these techniques has been made recently (2).
The rapid inspection method suggested to the grain trade by the Food and Drug Administration (2), based on the results of an extensive …
Paleontology And Stratigraphy Of The Carboniferous Rocks Of The Placitas Region, Northern Sandia Mountains, Sandoval County, New Mexico, Donald Francis Toomey
Paleontology And Stratigraphy Of The Carboniferous Rocks Of The Placitas Region, Northern Sandia Mountains, Sandoval County, New Mexico, Donald Francis Toomey
Earth and Planetary Sciences ETDs
A paleontologic and lithologic study of the Carboniferous rocks of the northern Sandia Mountains demonstrates that this predominantly marine sequence is divisible into several important series which are recognizable elsewhere.
The pre-Pennsylvanian rocks lack diagnostic fossils. However, correlation with a fossiliferous sequence in the southern Nacimiento Mountains, based on similar lithology and stratigraphic position, indicates a middle mississippian Meramec age for these rocks. The thickness ranges from 21 to 81 feet; they consist mainly of limestone associated with basal elastics. This sequence lies directly on Pre-Cambrian rocks. Nine sections have been measured and are shown geographically on three plates.
Unconformably …