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The Synthesis Of 4-Hydroxy And 2-Hydroxy-Diphenyl Ketimines, Paul Vittum, Richard Anderson, J. B. Culbertson

Proceedings of the Iowa Academy of Science

These syntheses were carried out through the action of the corresponding hydroxy-nitrile upon magnesium phenyl bromide in an anhydrous ether medium. Over two equivalents of the Grignard reagent were employed, one to react with the phenol group and the other with the nitrile. The addition compound was decomposed with water and ammonium chloride at about -15 degrees C. The ketimine extracted with ether was precipitated as the hydrochloride by the addition of dry hydrogen chloride. The hydroxynitriles were prepared from the corresponding hydroxy-aldehydes by the action of acetic anhydride on their oximes. Some modifications were worked out in the preparation …

College Catalogue 1928-1929, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents

Calendar for 1929-30 ... 5
Officers of Administration and Instruction ... 6
Faculty ... 7
General Information ... 26
Plan of Organization ... 26
Residence Student Health ... 26
Expenses and Fees ... 27
Scholarships ... 29
Extension Service ... 29
College Organizations ... 29
Training in Actual Teaching ... 31
Public Lectures and Entertainments ... 31
Boarding and Lodging ... 31
Employment of Students ... 33
Twelve Weeks Normal Training ... 33
School Credits in Lieu of Certificate Examinations ... 34
Examinations for Teachers Certificates ... 34
The Placement Bureau ... 34
Advisers and Amount of …

Iowa State Teachers College Program Of Recitations, Winter 1928-29, Iowa State Teachers College

UNI Schedule of Classes

A listing and schedule of the courses being taught as well as policies and procedures concerning attending classes at the Iowa State Teachers College.

The Address Of The President - Contributions To The Pleistocene Geology Of Iowa, George F. Kay

Proceedings of the Iowa Academy of Science

Although for many years much has been spoken and written about the glacial deposits of Pleistocene age in Iowa, in connection with the meetings of this Academy and many other scientific organizations, there is as much interest in these deposits today as at any previous time. Your retiring President has chosen therefore as the subject of this address, "Contributions to the Pleistocene Geology of Iowa." It is my purpose to recall to your minds some of the geologists who have made contributions to the Pleistocene geology of Iowa, and insofar as the time at our disposal will permit to point …

The Temperature Effect On The Solubilities Of Nickel, Tin, Copper, Steel (Chromium) And Zinc In Raw Cow's Milk, G. N. Quam

Proceedings of the Iowa Academy of Science

The polished strips of metal were agitated by means of a device constructed to simulate plant conditions as nearly as possible. The losses in weight per square decimeter per thirty minute exposure recorded represent averages of eight to twenty-four determinations under the experimental conditions.

Magnetic Properties Of Thin Cobalt Films Electrolytically Deposited, E. P. T. Tyndall, W. W. Wertzbaugher

Proceedings of the Iowa Academy of Science

Initial magnetization curves and hysteresis loops of cobalt films from 40 to 100 millimicrons thick show the same general characteristics as iron films of the same range of thickness. The specific properties, however, are largely dependent on the acidity of the electrolyte. The linear relation between thickness and reciprocal of coercive force discovered for iron films is not in general true for cobalt, though it is approximated in some series of films.

Title Page - Front Matter

Proceedings of the Iowa Academy of Science

No abstract provided.

Proceedings Of The Forty-Third Annual Meeting Of The Iowa Academy Of Science, Held At Fairfield, April 26 And 27, 1929: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

The Effect Of Various Treatments On Microorganisms In The Soil Under A Five-Year Rotation, P. E. Brown, B. A. Tomlin

Proceedings of the Iowa Academy of Science

It is generally conceded now that microorganisms play a large part in the transformations through which various plant food constituents pass, in the soil. They are the agents which are chiefly responsible for the production of available plant food. They break down organic matter, liberating the plant food constituents contained therein. The products of this decomposition react with the complex mineral soil constituents and change them into soluble, available compounds. Certain microorganisms also have the ability of utilizing the free nitrogen of the atmosphere, fixing it in the soil, to serve later for the feeding of plants.

The Production Of Propionic Acid From Pentoses By Propionibacterium Pentosaceum, C. H. Werkman, R. M. Hixon, E. I. Fulmer, C. H. Rayburn

Proceedings of the Iowa Academy of Science

Propionibacterium pentosaceum attacks pentoses (xylose, arabinose) with the production of propionic and acetic acids.

A Parallel Carbon Arc For Direct Current, L. B. Spinney

Proceedings of the Iowa Academy of Science

An arc between carbons of equal diameter placed parallel to each other and spaced a small distance apart operates automatically on alternating current and the carbons burn down equally. When supplied with direct current the positive carbon is consumed at a rate approximately twice as great as that of the negative. Therefore to operate the ordinary parallel carbon arc on direct current some provision must be made to move the positive carbon forward, or a larger carbon must be used on the positive side of the circuit.

The Rate Of Decomposition Of Some Artificial Manures, Frederick B. Smith

Proceedings of the Iowa Academy of Science

Much interest has been manifested in the production of artificial manures since Hutchinson and Richards first suggested the process in 1921. They found that straw could be converted into a good grade of manure and also that if a proper proportion of the reagents and optimum moisture conditions were maintained, decomposition was very rapid. They recommended the addition to the straw of 14 pounds of nitrogen as ammonium sulfate, enough finely ground limestone to neutralize the acidity produced, and sufficient water to wet the straw and keep it moist.

The Distribution Of The Genus Tradescantia In Iowa, D. G. Deihl

Proceedings of the Iowa Academy of Science

The Tradescantias in the Grinnell herbarium have been critically studied with a view to determining the species and their distribution. Subsequently the collections at the herbaria at the State College at Ames and the State University at Iowa City have been reviewed. Grateful acknowledgement is made to Mr. R. I. Cratty of the State College at Ames, and to Dr. B. Shimek and Dr. R. B. Wylie at Iowa City, for their aid in the use of the College and University collections. Further credit is due to Dr. H. S. Conard for guidance and suggestions.

The Effect Of Pressures Up To 17,000 Atmospheres Upon Some Colloidal Suspensions, Robert Wilson, Thos. C. Poulter

Proceedings of the Iowa Academy of Science

In some work which was being conducted at Wesleyan during the past year, on the effect of pressures upon some living organisms, it was noticed that when the water containing these organisms was subjected to pressures of more than a few hundred atmospheres a turbidity was usually developed. This suggested that something in the solution was being precipitated by means of pressure. Upon inspection it was found that this was some of the colloidal constituents in the water, and it was desired to determine whether or not pressure alone would cause the precipitation of a pure colloidal suspension. A number …

A Synthetic Tone-Mixer, Joseph Tiffin

Proceedings of the Iowa Academy of Science

A device designed to demonstrate the phenomenon of "tone-mixing" will be exhibited and described. By means of this apparatus a vibrato may be synthetically produced with the number of pulses per second, extent of frequency fluctuation, and intensity relationship under control. The manner in which each of these variables influences the perceived tone can thus be determined. It is also possible to reproduce a vibrato whose rate, extent, and intensity relationship are identical with those of artistic singing. One factor at a time can then be varied and the relative importance of the several elements in the artistic tone determined. …

A Comparison In Academic Achievement Of The Student In The Upper Quartile With Those In The Lower Quartile As Measured By Aptitude Tests, J. E. Evans

Proceedings of the Iowa Academy of Science

Of the 464 freshmen included in this study fifty-five were in the lower quartile and 109 in the upper. The tests used for the study were the I. S. C. Aptitude Test and the Engineering Information Test. The fifty-five students in the lower quartile made 196 failures during the first three terms, while the 109 students made 169 failures in the same time.

Lightning Injury To Alfalfa, Joseph C. Gilman

Proceedings of the Iowa Academy of Science

Lightning injury to herbaceous plants has been a phenomenon that has interested plant pathologists and growers alike for many years, and in 1918 the knowledge, then available on this subject, was well summarized by Jones and Gilbert. These authors note that while lightning injury is a frequent occurrence in potato fields, and less common in tobacco, cotton and sugar beet plantings, it has been rarely observed on other herbaceous crops: but one case of such injury to alfalfa, that of Sitensky in Europe, has been reported.

Germination Of Trees And Shrubs, L. H. Pammel, C. M. King

Proceedings of the Iowa Academy of Science

This paper is the twelfth of a series of germination studies of trees and shrubs, which have appeared in proceedings of the Iowa Academy of Science. The seeds for the present study were mostly collected in Texas and Mexico during January and February of 1929, by L. H. Pammel and were planted in the greenhouse at Iowa State College, during January and February of 1929.

Thomson Effect In Single Crystal Zinc, L. A. Ware

Proceedings of the Iowa Academy of Science

Results for a series of crystals made from Kahlbaum zinc are much more consistent than any previously reported by the writer. The Voigt-Thomson symmetry relation appears to be satisfied for the Thomson Effect. The specific resistance and temperature coefficient of resistance have also been measured for all the crystals.

Roster And Records Of Secretary: 1903-1929, Iowa Academy Of Science

Iowa Academy of Science Documents

Meeting minutes, conference programs, and more from the Iowa Academy of Science during the years 1903-1929.

The Spontaneous Culture Method For Studying The Non-Symbiotic Nitrogen Fixing Bacteria Of The Soil, R. H. Walker, John L. Sullivan

Proceedings of the Iowa Academy of Science

During the years which have elapsed since the discovery of the non-symbiotic nitrogen-fixing bacteria there have been extensive investigations on the characteristics and activities of this group of organisms. They have been found to be of great importance from the fertility standpoint, adding appreciable amounts of nitrogen to the soil annually where the conditions are favorable for their development. In many cases too, a correlation has been found between the ability of a soil to support a vigorous Azotobacter growth and its crop producing power.

Studies On Methods Of Measuring The Nitrate Assimilating Power Of Soils, Ray A. Pendleton, Frederick B. Smith

Proceedings of the Iowa Academy of Science

The work of many investigators has demonstrated the fact that nitrate nitrogen disappears from soils to which organic materials of a high carbon-nitrogen ratio have been added. Doryland in 1916 claimed that soils have a definite nitrate consuming power and that additions of organic matter such as straw, dextrose, or other soluble sugars stimulated the disappearance of the nitrates. He attributed this disappearance to the fact that the nitrates were assimilated by microorganisms but not lost from the soil.

Variations In Soil Reaction Affect Nitrification, P. E. Brown, G. V. C. Houghland

Proceedings of the Iowa Academy of Science

In some of the earliest studies on nitrification, it was found that the reaction of the soil exerted a profound influence on the occurrence of the process. In strongly acid soils, frequently no nitrate formation took place, and as the acidity increased, the process proceeded more and more slowly. It was further noted that additions of lime to acid soils would stimulate the action of the nitrifying bacteria and a greater production of nitrates would occur.

The Effects Of Some Nitrogen Fertilizers On Nitrification, Ray A. Pendleton, P. E. Brown, F. B. Smith

Proceedings of the Iowa Academy of Science

A number of investigations have shown the effects of certain nitrogen fertilizers on the nitrification process and it has generally been noted that nitrates would stimulate the production of nitrates. The work of Coleman, Brown and Gowda and Greaves may be referred to in this connection.

Do Significant Physiological Strains Of Bacillus Amylovorus (Burr.) Trev. Exist?, Frank L. Howard

Proceedings of the Iowa Academy of Science

From the plant pathologist's viewpoint, more knowledge of the existence of physiological strains of Bacillus amylovorus would be of value. Stewart after a study of the organism in culture calls attention to slight variations in the fermentation reactions of the nine different isolated cultures with which he worked. Therefore, at the suggestion of Dr. H. E. Thomas of Cornell University, N. Y., this work was undertaken in an effort to contribute this information. The portion on acid tolerance has been checked in the laboratories of the State University of Iowa through the courtesy of Drs. G. Hansmann and W. F. …

The Effect Of Steffen Waste On The Fermentation Of Pentosans From The Corn Stalk, E. I. Fulmer, C. H. Werkman, R. M. Hixon, A. L. Williams

Proceedings of the Iowa Academy of Science

It was found that Steffen waste furnishes a suitable source of nitrogen, salts, and buffers for the growth of Aerobacter pectinovorum on pentosan material prepared from corn-stalks.

Physiological Behavior Of The Propionic Acid Group Of Bacteria, Sara E. Kendall, C. H. Werkman

Proceedings of the Iowa Academy of Science

The group constitutes a number of species of bacteria producing large quantities of propionic acid from carbohydrates. The generic diagnosis of the group is: Propionibacterium, Orla-Jensen, 1909. Gram positive, non-sporulating non-motile short rods showing marked morphological variation in acid media or when grown under aerobic conditions; normal growth anaerobic. Cultures are catalase positive. Carbohydrates, glucosides and alcohols attacked with the production of propionic acid, acetic acid and CO₂. The species are differentiated on the basis of sugar fermentation, nitrate reduction, pigment production and morphology. A key to the species is given with a description of each.

Study Of Peronospora Trifolioum Debary On Species Of Leguminosae, I. E. Melhus, M. K. Patel

Proceedings of the Iowa Academy of Science

The downy mildew, Peronospora trifoliorum deBy. of alfalfa, Medicago sativa L., is a widespread disease occurring in almost all countries of the world where alfalfa is grown. This disease assumes importance in the middle-west during wet seasons, particularly in the spring and fall. In Iowa it is most destructive on fall seedings and on the first cutting in the spring. The present studies were undertaken to throw light on the relation of moisture and temperature to spore germination and infection, the possible host range of the downy mildew, and its method of overwintering.

Notes On Fungi — 1928, G. W. Martin

Proceedings of the Iowa Academy of Science

In their report on the Gasteromycetes of eastern Iowa, Macbride and Allin include three species of Mutinus, M. bovinus Morgan (M. elegans (Mont.) E. Fischer), M. caninus (Huds.) Fr. and M. brevis B. & C. (= M. ravenelii (B. & C.) E. Fischer). Coker and Couch, on the other hand, in their recent splendid work on the Gasteromycetes, recognize but two species as occurring in Eastern North America, namely M. ravenelii and M. elegans.

Additional Notes On Iowa Mosses, Betty Blagg

Proceedings of the Iowa Academy of Science

During the year 1928-29, I have done no concentrated work on the Iowa mosses. A few interesting specimens have been picked up, however, in the little time that it was possible to devote to the work. Collections have been started in the vicinity of Ames, a part of the state in which almost no collecting has been reported. The Ledges State Park at Boone promises interesting possibilities, since the geological formations are quite different from those of the rest of the state. Rhodobryum roseum (Weis.) Limpr. was found fruiting. Dr. A. J. Grout says of this species, "Although common, in …