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Articles 291811 - 291840 of 294450

Full-Text Articles in Physical Sciences and Mathematics

A Cytolocical Study Of The 4th Chromosome Of Eyeless Drosophila, Joyce Ruth Soelch May 1943

A Cytolocical Study Of The 4th Chromosome Of Eyeless Drosophila, Joyce Ruth Soelch

Bachelors’ Theses

In Drosophila Melanogaster the recessive gene for eyeless and its normal allelomorph, which cause in general a redaction of the size of the eye in the adult fly, are situated in the small 4th chromosome. The purpose of this experiment was to make a Cyto- logical study and comparison of the 4th chromosomes of the eyeless Drosophila and the normal plus or wild type to determine whether this recessive gene, located on the 4th chromosome, results in a difference in the number, size, formation, or location of bands.

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A Suggested Method For The Measurement Of Unsaturation In Organic Compounds By Means Of A Hydrogen Number, Richard Roberts May 1943

A Suggested Method For The Measurement Of Unsaturation In Organic Compounds By Means Of A Hydrogen Number, Richard Roberts

Bachelors’ Theses

The measurement of unsaturation in organic compounds are commonly expressed in terms of an iodine number, but as this value is not trustworthy in a number of cases, it has been suggested by earlier worker that an indication of unsaturation could be obtained by the quantitative hydrogenation of a compound and expressing the result in terms of a hydrogen number. Although such determinations have been previously made, usually at elevated temperatures and pressures, it is the purpose of this work to carry out the hydrogenation at room temperature and atmospheric pressure. For purposes of comparison, determinations will be made at …

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A Viscometric Determination Of The Diastatic Effect Of Amylase On Starches, Dawn Marie Ehlert May 1943

A Viscometric Determination Of The Diastatic Effect Of Amylase On Starches, Dawn Marie Ehlert

Bachelors’ Theses

Internal friction causes some liquids to flow with less freedom than true solutions of the same density. or with less freedom than water. This is attributed in part to larger particle size and prompts one to propose that when using solutions in which the dissolved substance has not been dispersed and subdivided to single molecular particles that the dissolved particles may be present as com­binations. These combinations may increase to enlarged dimensions with changes in temperature, density. electric charges. etc. Similar conditions are characteristic o starch solutions. The solutions are colloidal and vary in particle size. In some situations the …

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Gas - Volumetric Semimicrodetermination Of Carbon: A Wet Method For Aliphatic And Cyclic Compounds, Roger P. Staiger May 1943

Gas - Volumetric Semimicrodetermination Of Carbon: A Wet Method For Aliphatic And Cyclic Compounds, Roger P. Staiger

Chemistry Honors Papers

This 18 page thesis explains the technique and apparatus of gas-volumetric semimicrodetermination of carbon and shows the accuracy of this method.

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The Dry Lake Section Of The Brazer Foundation, James S. Yolton May 1943

The Dry Lake Section Of The Brazer Foundation, James S. Yolton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Dry Lake section of the Brazer formation, totalling 3100 feet in thickness, is an excellent exposure containing an abundance of fossils many of which are well preserved. The fauna indicates that the formation is to be correlated with the Upper Iowan and Chester series of the type Mississippian system in the Mississippi Valley section. Substantial fossil evidence indicates the following correlation for the Brazer formation members. The C unit represents the western equivalent of the Middle Meramec group, i.e., the Salem and St. Louis limestones. The D member is decidedly Ste. Genevieve in general faunal aspects but, because of …

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Spectrographic Analysis Of Montana Limestones, Clifford A. Barkell Apr 1943

Spectrographic Analysis Of Montana Limestones, Clifford A. Barkell

Bachelors Theses and Reports, 1928 - 1970

Spectrographic analysis of limestones as a possible method of correlation of geologic formations is an altogether new line of investigation. As far as known the only previous work consists of a few analyses made by Fred Lines in his bachelor thesis work at Montana School of mines in the spring of 1942.

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Concentration By Flotation Of A Complex Galena - Sphalerite - Chalcopyrite Ore From The Nine Mile District Near Missoula, Montana, Truxton J. Fisher, John L. Tokich Apr 1943

Concentration By Flotation Of A Complex Galena - Sphalerite - Chalcopyrite Ore From The Nine Mile District Near Missoula, Montana, Truxton J. Fisher, John L. Tokich

Bachelors Theses and Reports, 1928 - 1970

At the present time ore bodies being mined are becoming more and more complex in mineral association, thus presenting a more difficult problem in their concentration. Lead-zinc sulphide ores are among the more common ores which present such difficulties.

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A Study Of Certain Substitution Groups, Merle Mitchell Apr 1943

A Study Of Certain Substitution Groups, Merle Mitchell

Mathematics & Statistics ETDs

This thesis purposes to study a certain group of movements which can be expressed as substitutions. The groups of movements which send a square into itself is to be studied as a group of eight substitutions on the vertices for the purpose of leading up to the real problem of this paper. From the octic group, it is natural to proceed to a study of the movements which send a cube into itself. In particular, it is the aim of this thesis to discover the group of the cube and to analyze some of its properties. There are twenty-eight rotations …

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Permeability And Porosity Studies Of The Cut Bank Oil Sand, Wesley Edward Davis Apr 1943

Permeability And Porosity Studies Of The Cut Bank Oil Sand, Wesley Edward Davis

Bachelors Theses and Reports, 1928 - 1970

In studying the Cut Bank field and its numerous wells, it is found that dry holes are surrounded by producing wells, and also that the field as a whole is very irregular; water, oil, and gas zones in many cases following no definite pattern. In some instances, this phenomenon may be due to the lensing and thinning of the producing sands, but it is evident that this is not the only factor. There­fore, the controlling factors must be porosity and permeability.

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Coal In Montana, Clifford A. Barkell Apr 1943

Coal In Montana, Clifford A. Barkell

Bachelors Theses and Reports, 1928 - 1970

Coal was first mined in Montana in the year 1880. For the last thirty years the mining of coal in this state has been very important-with few people realizing its value. In the mineral industry, the value of the annual production of coal is exceeded by none of the non-metallics, and only by gold, silver, and copper in the metallics. At the present time the coal production of Montana is valued at about 41000,000.00 annually.

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Zinc Plating Magnesium, Howard Wilbur Adam Apr 1943

Zinc Plating Magnesium, Howard Wilbur Adam

Bachelors Theses and Reports, 1928 - 1970

Magnesium and magnesium alloys are becoming more and more important in modern industry. Their use in the aviation industry has been greatly curtailed because of their comparatively poor resistance to corrosion especially in moist atmospheres. Many methods have been adopted to improve their resistance to corrosion.

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The Electrodeposition Of Iron-Manganese Alloys, Earl C. Roberts Apr 1943

The Electrodeposition Of Iron-Manganese Alloys, Earl C. Roberts

Bachelors Theses and Reports, 1928 - 1970

Various electrolytes were experimented with in an attempt to deposit an iron-manganese alloy. An Alloy was obtained from a solution containing ferrous ammonium sulfate, manganous sulfate, and ammonium sulfate. Further experimentation was done in an effort to determine the optimum conditions of deposition and the highest manganese alloy which could be produced.

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On The Production Of Polyploidy With Paradichlorbenzene, Mary Anne Carey Apr 1943

On The Production Of Polyploidy With Paradichlorbenzene, Mary Anne Carey

Bachelors’ Theses

The subject of polyploidy has been of scientific interest for some time. The true nature of the cause of this phenomenon has been disputed ever since its existence was made known. Polyploidy is the condition in which the haploid number of the chromosomes, contained within the nucleus, is multiplied so that there is a higher number of chromosomes present than there is in the typical diploid cell of that particular plant or animal. The diploid number of the chromois known as 2n, therefore, higher multiples would be referred to as 3n, 4n, 8n etc. Some plants or animals have one …

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Abstract Papers Apr 1943

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

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Preliminary Report On Subtratum Temperature Studies On Root Growth, Stanley W. Oexemann Apr 1943

Preliminary Report On Subtratum Temperature Studies On Root Growth, Stanley W. Oexemann

Journal of the Minnesota Academy of Science

No abstract provided.

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Abstract Papers Apr 1943

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

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Back Matter Apr 1943

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.

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Establishment, Development, And Management Of Conifer Plantations In The Eli Whitney Forest, New Haven, Connecticut, Ralph C. Hawley, Harold J. Lutz Jan 1943

Establishment, Development, And Management Of Conifer Plantations In The Eli Whitney Forest, New Haven, Connecticut, Ralph C. Hawley, Harold J. Lutz

Yale School of the Environment Bulletin Series

No abstract provided.

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White Pine Blister Rust In Western North America, J. L. Mielke Jan 1943

White Pine Blister Rust In Western North America, J. L. Mielke

Yale School of the Environment Bulletin Series

No abstract provided.

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Polyhydroxyamines, John Wotiz Jan 1943

Polyhydroxyamines, John Wotiz

Master's Theses

"The industrial growth of aliphatic chemistry, which has constituted one of the outstanding advances of recent years, has been almost entirely in the field of hydrocarbons and their simpler chlorine and oxygen derivatives… Representative of the aliphatic amines, possibly only the methyl, amyl and ethanol amines may be said to have been commercially available. And yet the field of aliphatic nitrogen chemistry possesses the greatest variety of known aliphatic compounds; there are at least several nitrogen analogs of each oxygen compound, often more stable, more definitely characterized, and more reactive chemically." Relatively few aminoalcohols, especially polyhydroxyaminoalcohols have been prepared. Due …

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Pheasant Weights And Time Of Season In Relation To Meat Production In Nebraska, Levi L. Mohler Jan 1943

Pheasant Weights And Time Of Season In Relation To Meat Production In Nebraska, Levi L. Mohler

Nebraska Game and Parks Commission: Staff Research Publications

During the 1942 pheasant hunting season in Nebraska 479 bagged cock pheasants were weighed in western and southwestern counties. Analysis of the weights revealed that the time of the open season apparently has a material effect upon the tonnage of meat harvested for human consumption.

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Limnological Notes On Lake Superior, Samuel Eddy Jan 1943

Limnological Notes On Lake Superior, Samuel Eddy

Journal of the Minnesota Academy of Science

No abstract provided.

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The Reaction Of Beta-Hydroxy Ketones With Phenyl Magnesium-Bromide Keteneimines., Mack Castleman Fuqua Jan 1943

The Reaction Of Beta-Hydroxy Ketones With Phenyl Magnesium-Bromide Keteneimines., Mack Castleman Fuqua

LSU Historical Dissertations and Theses

No abstract provided.

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The Kinetics And Mechanism Of The Alkaline Fading Of Iodo Phenol Blue - The Diacetone-Alcohol - Hydroxide Ion Reaction., Ralph Theodore Overman Jan 1943

The Kinetics And Mechanism Of The Alkaline Fading Of Iodo Phenol Blue - The Diacetone-Alcohol - Hydroxide Ion Reaction., Ralph Theodore Overman

LSU Historical Dissertations and Theses

No abstract provided.

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Zeta Potentials., Joseph Ehrman Pryor Jan 1943

Zeta Potentials., Joseph Ehrman Pryor

LSU Historical Dissertations and Theses

No abstract provided.

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The Physiography Of Beauregard And Allen Parishes., Wilbur Charles Holland Jan 1943

The Physiography Of Beauregard And Allen Parishes., Wilbur Charles Holland

LSU Historical Dissertations and Theses

No abstract provided.

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On The Fourier Developments Of A Certain Class Of Theta Quotients, M. A. Basoco Jan 1943

On The Fourier Developments Of A Certain Class Of Theta Quotients, M. A. Basoco

Department of Mathematics: Faculty Publications

In this paper we shall be concerned with the functions φka(z) defined by the relation
(1) φka(z) ≡{d/(dz)logℓα (z,q)}k = {[ℓά(z,q)] ÷ [ℓα(z,q)]k, α + 0, 1, 2, 3,
where ℓα(z, q) is a Jacobi theta function and k is a positive integer. In the first place, we shall derive the Fourier developments which represent these functions in a certain strip of the complex plane; it …

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Direct Spectrophotometric Determination Of Lead Naphthenate In Linseed Oil, Nicholas Peter Oehlberg Jan 1943

Direct Spectrophotometric Determination Of Lead Naphthenate In Linseed Oil, Nicholas Peter Oehlberg

Master's Theses

No abstract provided.

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The Potentiometric Determination Of Zinc In Dowmetal Alloys., James S. Goodman Jan 1943

The Potentiometric Determination Of Zinc In Dowmetal Alloys., James S. Goodman

Electronic Theses and Dissertations

No abstract provided.

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The Monadnock Volume 17, Number 1, December 1942, Clark University Geographical Society Dec 1942

The Monadnock Volume 17, Number 1, December 1942, Clark University Geographical Society

The Monadnock (Clark Geographical Society)

Volume 17, Issue 1 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).

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