Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

PDF

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type

Articles 289681 - 289710 of 292548

Full-Text Articles in Physical Sciences and Mathematics

Synthesis Of Complexes Of Potassium Thiocyanate With Thiourea And Biurnet, Barclay Belding Fishburn Jun 1944

Synthesis Of Complexes Of Potassium Thiocyanate With Thiourea And Biurnet, Barclay Belding Fishburn

Honors Theses

The main objective of the work was an attempt to prepare certain compounds of the purine group for possible use in cardio-therapy, since the purine group is known to exert a stimulating action on the heart. However, under certain conditions these compounds cause a serious rise in blood pressure. It was thought that perhaps some compound which would produce dilation of the blood vessels could be combined with the purine group, to give a compound which would have the stimulative property, and in which the rise in blood pressure would be absent or at least minimized. Since such a type …

Go to article

A Preliminary Polarographic Investigation Of Hydrogen Bonding - The Ortho- And Para- Hydroxy Benzaldehydes, Edwin Gerald Newstead Jun 1944

A Preliminary Polarographic Investigation Of Hydrogen Bonding - The Ortho- And Para- Hydroxy Benzaldehydes, Edwin Gerald Newstead

Honors Theses

The polagraphic method should be able to determine the presence of hydrogen bonds in ortho-hydroxy benzaldehyde in carefully buffered water solutions. The wave-height for the reduction of ortho-hydroxy benzaldehyde in acid solution is about one-half the height in basic solution. This would seem to indicate that the intermediate reduction product is formed by the reduction of ortho-hydroxy benzaldehyde in acid medium. This intermediate is stabilized by the presence of a hydrogen bond, so that further reduction to the hydroxy benzyl alcohol is not possible at the dropping mercury electrode.

Go to article

Preparation Of Certain Purine Thiocyanate Complexes, Robert Wallace Carter Jun 1944

Preparation Of Certain Purine Thiocyanate Complexes, Robert Wallace Carter

Honors Theses

As the purine group of compounds is known to exert a stimulative effect on the heart, the object of this research was to prepare certain compounds of the purine group for possible use in cardiotherapy. However, a serious rise in blood pressure often accompanies the use of these compounds, it would be desirable to combine them with some compound which would dilate the blood vessels.

Go to article

A Study Of Mixed Hydrogels Of Titania And Zirconia, James Borst Bouck Jun 1944

A Study Of Mixed Hydrogels Of Titania And Zirconia, James Borst Bouck

Honors Theses

Hydrogels of titania, formed by addition of bases to acid solutions of titanium salts, have been known since Rose's work in 1823. Hydrogels of zirconia have been prepared and investigated by several workers. These hydrogels of titania and zirconia are both acid gels, that is, they are formed at pH's considerably less than 7.

Go to article

An Investigation Of The Reaction Of Bromopicrin With Liquid Ammonia, Seymour L. Meisel Jun 1944

An Investigation Of The Reaction Of Bromopicrin With Liquid Ammonia, Seymour L. Meisel

Honors Theses

The purpose of this research was to study the reaction between bromopicrin, also referred to as nitro-bromoform or tribromomonitromethane, with liquid ammonia. It seems surprising, but very little has been done on the reaction between these halogen nitro derivatives of methane and liquid ammonia.

Go to article

The Relation Between Viscosity And Silica Concentration Of Silicic Acid Gels, Jules David Viglielmo Jun 1944

The Relation Between Viscosity And Silica Concentration Of Silicic Acid Gels, Jules David Viglielmo

Honors Theses

In this work we have again been concerned with the silica concentration but have elected to use viscosity measurements as a means of studying the process of gelation rather than the former method used by Hurd and Schaffer. As pointed out by Hurd and Santora, who use the viscometer in studying the effect of added electrolytes the process of gelation may in this way be observed.

Go to article

Terminology Relating To The Occurrence, Behavior And Use Of Water In Nebraska, G. E. Condra Jun 1944

Terminology Relating To The Occurrence, Behavior And Use Of Water In Nebraska, G. E. Condra

Conservation and Survey Division

No abstract provided.

Go to article

Corona Discharge From Antenna Wire: A First Partial Report, Robert Katz May 1944

Corona Discharge From Antenna Wire: A First Partial Report, Robert Katz

Robert Katz Publications

Purpose: 1. To examine the conditions for corona at the surface of a wire. This report is a theoretical discussion. No test procedure was used.

Conclusions:
1. Calculation of the gradient at the surface of the fixed-wire liaison antenna (bare copperweld, .040" diameter) on the B-17 airplane indicates that it is of the order of 200 times the gradient measured at the top generating voltmeter.
2. Further work will be done by the Special Devices Branch in an attempt to determine the conditions under which insulated wire goes into corona.

Go to article

A Study Of Some Dehydrating And Infiltrating Agents, Monica Hoefs May 1944

A Study Of Some Dehydrating And Infiltrating Agents, Monica Hoefs

Bachelors’ Theses

The ethyl-alcohol-xylol series produces a hardening and shrinking of the tissues. It has long been criticized for this reason.

Go to article

Two Newly Discovered Conifers, George F. Beck Apr 1944

Two Newly Discovered Conifers, George F. Beck

All Faculty Scholarship for the College of the Sciences

Two genera of coniferous wood, apparently not listed among the Tertiary woods of the western states, have been recognized in the Percy Train collections from Rainbow Ridge, northwestern Nevada. These two, Tsuga (hemlock) and Chamaecyparis (cedar) bring up to 14 the genera of coniferous wood more or less certainly identified from the period and area in question.

Go to article

Status Of Tertiary Woods Of The Western States Representing The Juglandaceae, George F. Beck Apr 1944

Status Of Tertiary Woods Of The Western States Representing The Juglandaceae, George F. Beck

All Faculty Scholarship for the College of the Sciences

For many years there has been uncertainty concerning the generic status of some fossil leaves belonging without question to the walnut family as a whole. A review of the woods of Juglandaceae as they have appeared in Tertiary horizons of the western states has suggested which genera are present, and in what proportions their leaves (or other remains) might be expected to appear.

Go to article

Drought, Its Effects And Measures Of Control In Nebraska, G. E. Condra Apr 1944

Drought, Its Effects And Measures Of Control In Nebraska, G. E. Condra

Conservation and Survey Division

No abstract provided.

Go to article

Fluorite Near Silver Bow, Montana, Charles V. Campbell Feb 1944

Fluorite Near Silver Bow, Montana, Charles V. Campbell

Bachelors Theses and Reports, 1928 - 1970

The wartime demand for fluorspar has caused renewed interest in fluorite deposits. Near Silver Bow, Montana, a deposit of massive, coarsely crystalline fluorspar, which has not been described in the literature, has attracted the atten­tion of the United States Geological Survey.

Go to article

The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty Feb 1944

The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to elucidate this phenomena of frother incompatibility, and to offer an explanation based upon several divergent lines of investigation. The research was limited to four common frothing agents, namely, pine oil, n-amyl alcohol, sodium oleate, and sodium lauryl sulphate (Dreft).

Go to article

Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews Feb 1944

Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews

Bachelors Theses and Reports, 1928 - 1970

This thesis is concerned primarily with the production of metal powder compacts of iron and tin. In producing these compacts, the effects of process­ing variables on some of the essential properties of the pellets made were investigated.

Go to article

Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr. Feb 1944

Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr.

Bachelors Theses and Reports, 1928 - 1970

Although powder metallurgical methods have been used for years to fabricate tungsten and platinum, very little scientific data have been recorded until the beginning of this century. A large percentage of all commercial production at present is based upon past practice rather than upon scientific knowledge.

Go to article

Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk Feb 1944

Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk

Bachelors Theses and Reports, 1928 - 1970

The original objective of this project was to determine the effect of varying current intensity and electrode coating composition upon the spatter losses and porosity of arc welds made by alternating current. This subject was suggested by the Welding Research Council of the Engineering Foundation, which is a clearing house for welding research in order to avoid du­plication of work.

Go to article

Age Hardening Of Copper Antimony Alloys, William R. Stern Feb 1944

Age Hardening Of Copper Antimony Alloys, William R. Stern

Bachelors Theses and Reports, 1928 - 1970

A large number of alloys of varying percentages of copper and antimony were prepared. These alloys were treated in various ways which might be expected to produce age hardening. The effect of cold working was studied in the range where the alloys were malleable.

Go to article

The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien Feb 1944

The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien

Bachelors Theses and Reports, 1928 - 1970

An electrodeposition of an iron-manganese alloy was made from the same conditions determined by previous re­search. Various addition agents were experimented with in an attempt to produce better conditions for electro-deposition. It was found advantageous to add small a­mounts of sodium lauryl sulfate and ammonium sulfite to the electrolyte.

Go to article

An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry Feb 1944

An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry

Bachelors Theses and Reports, 1928 - 1970

Recent demands for petroleum to carry on the war effort have resulted in widespread prospecting in the northern Great Plains. Nearly all oil wells now drilled are of a depth to penetrate the marine Jurassic formations. It is known that these strata differ in thickness from place to place, but information of distribution, thickness, and lithology has not yet been compiled.

Go to article

Dokümantasyon Taşkömürün Tekni̇k Bakimdan Araştirilmasi Ve Kiymetlendi̇ri̇lmesi̇, - - Jan 1944

Dokümantasyon Taşkömürün Tekni̇k Bakimdan Araştirilmasi Ve Kiymetlendi̇ri̇lmesi̇, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

İstati̇sti̇k Ve Fi̇yatlar, - - Jan 1944

İstati̇sti̇k Ve Fi̇yatlar, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

Spectrophotometric Determinations Of The Sulfonamides, Paul William Brna Jan 1944

Spectrophotometric Determinations Of The Sulfonamides, Paul William Brna

Master's Theses

No abstract provided.

Go to article

The Determination Of Small Amounts Of Carbon Monoxide In Air, Edward J. Fitzsimons Jan 1944

The Determination Of Small Amounts Of Carbon Monoxide In Air, Edward J. Fitzsimons

Master's Theses

No abstract provided.

Go to article

Mta Ensti̇tüsünün Dokuzuncu Çalişma Yilinin Tekni̇k Bi̇lançosu, - - Jan 1944

Mta Ensti̇tüsünün Dokuzuncu Çalişma Yilinin Tekni̇k Bi̇lançosu, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

Umumi̇ Maden Durumu Madenci̇li̇ği̇mi̇zi̇n 21 Yillik Bi̇lançosu Ve 1944 Yilinin İlk 6 Ayindaki̇ Durumu, - - Jan 1944

Umumi̇ Maden Durumu Madenci̇li̇ği̇mi̇zi̇n 21 Yillik Bi̇lançosu Ve 1944 Yilinin İlk 6 Ayindaki̇ Durumu, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

Doğu Toroslardaki̇ Permokarboni̇fer Arazi̇si̇nde Bi̇r Boksi̇t Yataği, M. Blumenthal Jan 1944

Doğu Toroslardaki̇ Permokarboni̇fer Arazi̇si̇nde Bi̇r Boksi̇t Yataği, M. Blumenthal

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

Keçi̇borlu Kükürt Yataği, Necdet Egeran Jan 1944

Keçi̇borlu Kükürt Yataği, Necdet Egeran

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

Etütler Küre'deki̇ Eski̇ Bakir Yataği İle Yeni̇ Keşfedi̇len Aşiköy Yatağinin Ve Karadeni̇z Orta Ve Doğu Kesi̇mleri̇ Sahi̇l Bölgesi̇ni̇n Metallojeni̇si̇, V. Kovenko Jan 1944

Etütler Küre'deki̇ Eski̇ Bakir Yataği İle Yeni̇ Keşfedi̇len Aşiköy Yatağinin Ve Karadeni̇z Orta Ve Doğu Kesi̇mleri̇ Sahi̇l Bölgesi̇ni̇n Metallojeni̇si̇, V. Kovenko

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

Afyonkarahi̇sarla Kayseri̇ Arasindaki̇ Torosun İç Kenarindaki̇ Genç Volkani̇k Sahreler, P. De Wi̇jkerslooth Jan 1944

Afyonkarahi̇sarla Kayseri̇ Arasindaki̇ Torosun İç Kenarindaki̇ Genç Volkani̇k Sahreler, P. De Wi̇jkerslooth

Bulletin of the Mineral Research and Exploration

No abstract provided.

Go to article

First Prev Next Last