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A Preliminary Report On A Check-List Of Iowa Teleosts, W. W. Aitken
A Preliminary Report On A Check-List Of Iowa Teleosts, W. W. Aitken
Proceedings of the Iowa Academy of Science
In 1927, George E. Potter and David T. Jones recorded in volumes, thirty-four proceedings of the Iowa Academy of Science, a compilation and revision of the fish records published for Iowa. In this article all of the available published records for Iowa fish were brought together, and species lists, with locality records and bibliography were recorded together with the tracing of any synonymy through all the sources; some interpretations were made. The Potter and Jones list presented one hundred and twenty-seven recognized species with a hypothetical list including twenty-one species and sub-species. This list has been of appreciable benefit to …
Effects Of Ultracentrifuging Oxytricha, Harold W. Kirshenblit
Effects Of Ultracentrifuging Oxytricha, Harold W. Kirshenblit
Proceedings of the Iowa Academy of Science
Oxytricha, a hypotrich having two macronuclei, was ultracentrifuged at a force of about 50,000 times gravity for five to ten minutes. It was found that the macronuclei and micronuclei are of different relative densities, the macronuclei being drawn to the centrifugal pole by high-speed centrifuging, while the micronuclei appear to be only slightly affected by the forces used. Oxytricha may be stratified and torn in two, and the fragments are able to move about independently of each other. Fragments without marconuclei are capable of normal activity, the external body form being regained in from fifteen minutes to an hour or …
Illustrations Of The Fleshy Fungi Of Iowa I. The Purple-Brown Spored Agarics, J. C. Gilman
Illustrations Of The Fleshy Fungi Of Iowa I. The Purple-Brown Spored Agarics, J. C. Gilman
Proceedings of the Iowa Academy of Science
One of the functions of the Iowa Academy of Science is to acquaint ourselves with the flora and fauna of our state and to make record of the occurrence of plants or animals which have some peculiarly desirable or undesirable character which makes them noteworthy. We have many papers and scattered references to the fungus flora of the state, but at no time have adequate illustrations of the fleshy-fungi occurring here been published. I propose, therefore, to gather into this series of notes illustrations of the more common fleshy-fungi of Iowa in order that the interested membership may become more …
Liverworts Of The So-Called Unglaciated Area Of Iowa, Henry S. Conard
Liverworts Of The So-Called Unglaciated Area Of Iowa, Henry S. Conard
Proceedings of the Iowa Academy of Science
For ten years it has been well known to geologists that all of the State of Iowa was at one time or another covered by Pleistocene ice. The northeastern corner of the State is usually mapped as unglaciated - a part of "the unglaciated area" which includes adjacent corners of Illinois, Wisconsin and Minnesota. At no time was this area an island in a sea of ice as the maps suggest. It was once swept on the west by a glacier that extended far to the south. At another time the area was swept by ice on the east. The …
Application Of The Van't Hoff Equation To Adsorption Equilibria, H. H. Rowley, W. B. Innes
Application Of The Van't Hoff Equation To Adsorption Equilibria, H. H. Rowley, W. B. Innes
Proceedings of the Iowa Academy of Science
Isothermal adsorption data for many gases and vapors on charcoal and other adsorbents have been shown by various investigators (1), (2), (3), (4), to agree satisfactorily with the Langmuir adsorption isotherm, except for deviations, possibly due to multilayer adsorption, as the pressure of the saturated vapor is approached. The Langmuir equation is derived on the hypothesis of a unimolecular adsorbed layer. The rate of adsorption, assumed proportional to the pressure p and the fraction of the surface unoccupied, (1 - ϑ), is equated to the rate of desorption which is assumed proportional to the fraction of the surface covered, ϑ, …
Studies On Alcohol Gelation Of Serum, T. U. Marron
Studies On Alcohol Gelation Of Serum, T. U. Marron
Proceedings of the Iowa Academy of Science
Lewin (1) described a gelation reaction which takes place in human blood serum when it is mixed with an equal quantity of 80 per cent ethyl alcohol in vitro. Varying degrees of rigidity of the mixture were noticed with sera from different persons. In this study an attempt was made to discover whether there was any correlation between the degree of gelation and the type of disease had by hospitalized patients. In later studies search was also made for correlation of this reaction with composition and physical properties of the sera.
New Synthetic Tools In The Pyridine, Quinoline And Other Nitrogen-Heterocyclic Series, Sydney M. Spatz, H. Gilman
New Synthetic Tools In The Pyridine, Quinoline And Other Nitrogen-Heterocyclic Series, Sydney M. Spatz, H. Gilman
Proceedings of the Iowa Academy of Science
The halogen-metal interconversion reaction now makes possible the preparation of hitherto difficultly or completely inaccessible organolithium compounds from the corresponding bromo- or iodo-nuclear substituted nitrogen heterocycles by means of other organolithium compounds like n-propyllithium and n-butyllithium : C5H4NBr +n-C4H9Li ( 3-bromopyridine) → C5H4NLi +n-C4H9Br ( 3-pyridyllithium). These organolithium compounds of the nitrogen heterocycles are of a relatively high order of reactivity with other functional groups. Some of the types reported on in the pyridine series are: 1. 3-pyridyllithium in 70 per cent yield from …
Oil Discovery Excitement In Iowa, Charles Keyes
Oil Discovery Excitement In Iowa, Charles Keyes
Proceedings of the Iowa Academy of Science
Nearly a quarter of a century ago, I ventured to present a paper before this Academy in which was pointed out a number of definite geological structures that could serve as oil reservoirs, and that were the most likely belts wherein to make practical tests for natural gas and rock-oil, in this state and Missouri. At the time, and for long after, oil men were so engaged in exploration of the then new oil-fields of Oklahoma, east Texas and Louisiana that little attention could be given to new explorations elsewhere. Recently, certain oil companies have been attracted to the Iowa …
A Study Of The Effectiveness Of Problem Solving On Achievement In College Physics, C. J. Lapp
A Study Of The Effectiveness Of Problem Solving On Achievement In College Physics, C. J. Lapp
Proceedings of the Iowa Academy of Science
A study was made between matched pairs of students from two separate years. One year the students were assigned problems but no check-up was made as to whether the problems were solved. The next year the same textbook and lessons were used, but the students were required to hand in six solved problems three times per week. The criterion of success was the scores made on the Coöperative Physics Test. Approximately 130 matched pairs of students were studied consisting of various levels of ability.
A Study Of The Effectiveness Of Mathematical Versus Physical Solutions In Problem Solving In College Physics, C. J. Lapp
A Study Of The Effectiveness Of Mathematical Versus Physical Solutions In Problem Solving In College Physics, C. J. Lapp
Proceedings of the Iowa Academy of Science
An experiment has been conducted in an attempt to determine if there is a significant difference between the achievements of two matched groups of students each having differential treatment with respect to problem solving as measured by a standard final examination. The Physical Solution method gave unquestionably statistically significant results for the upper one-third of the groups. There was no significant difference in the low group which fact tended to hide a small but significant difference from the whole group.
1940 Little Tutor, Iowa State Teachers College High School
1940 Little Tutor, Iowa State Teachers College High School
Malcolm Price Laboratory School Yearbooks
The student yearbook of the Teachers College High School (later the Northern University High School, part of the Malcolm Price Laboratory School of the University of Northern Iowa).
The Alumnus, V24n1, January 1940, Iowa State Teachers College
The Alumnus, V24n1, January 1940, Iowa State Teachers College
The Alumnus
Inside This Issue:
-- An Alumni Calendar of Events
-- The Campus Today
-- Graduates are Urged to Register for Jobs
-- The Athenia Disaster - My Story
-- Little Prisoners, Row on Row!
-- We'd Love to Have You Over
-- The Prowl...
-- Reunions
-- Letters
-- News
-- Marriages
-- Births
-- Deaths
-- I'm proud to be a graduate of the Iowa State Teacher College because...
A Study Of The Urogenital Systems Of Emys Blandingii, With Observations On The Occurance Of Mullerian Ducts In Males, Frank A. Nicholson, P. L. Risley
A Study Of The Urogenital Systems Of Emys Blandingii, With Observations On The Occurance Of Mullerian Ducts In Males, Frank A. Nicholson, P. L. Risley
Proceedings of the Iowa Academy of Science
It is somewhat surprising that accurate information concerning the urogenital systems and cloacae of male and female turtles is not readily available to the student of comparative anatomy. Literature pertaining to the urogenital system of turtles is concerned mostly with species alien to North America, and is mainly in foreign publications; also, most illustrations do not give clear or precise impressions of these structures. The information available either is of a too general nature and includes somewhat superficial observations on numbers of species, or is concerned with only a single aspect of the entire system. In view of this, it …
Differences In The Phosphatase Systems Of Plant And Animal Tissue By A Michrotechnic, James J. Hilbe, T. U. Marron
Differences In The Phosphatase Systems Of Plant And Animal Tissue By A Michrotechnic, James J. Hilbe, T. U. Marron
Proceedings of the Iowa Academy of Science
Gomori1 has shown the location of phosphatase m animal organs by a michrotechnic. The principle is as follows: tissue sections are incubated in the presence of a substrate. Phosphate ions will be split off by the enzyme and in the presence of the calcium ion will form insoluble calcium phosphate at the point of liberation. Calcium phosphate can be converted to a dark colored insoluble precipitate. The visible precipitate then indicates the location of the phosphatase. The purpose of this research has been to subject the plant material to a similar procedure and so demonstrate any similarity or dissimilarity …
Chemical Evidences Of Intoxication, R. W. Getchell
Chemical Evidences Of Intoxication, R. W. Getchell
Proceedings of the Iowa Academy of Science
Chemical methods to determine whether the driver of an automobile is under the influence of alcohol are replacing the older physical tests. The technique consists of distilling the alcohol from a known quantity of body fluid - blood or urine - into a standard solution of acidified potassium dichromate. Through subsequent titration, the quantity of unreduced dichromate is determined and the number of milligrams of alcohol per 100 milliliters of body fluid is computed. Reliable methods of analysis, differing in details but not in principle, have been developed by Widmark of Sweden, Nicloux of France, Harger of Indiana, Muehlberger of …
A Taxonomic Study Of The Genus Galium In Iowa, Philip Jordon Leyendecker Jr.
A Taxonomic Study Of The Genus Galium In Iowa, Philip Jordon Leyendecker Jr.
Proceedings of the Iowa Academy of Science
The genus Galiurn, a member of the Madder family (Rubiaceae), is world-wide in its distribution and includes approximately two hundred and fifty species. Ten species of Galium were enumerated by R. I. Cratty1 in his annotated list of Iowa flora. Two new species, four varieties and three forms have since been reported for the state. The present study of the genus was undertaken with two objects in view: first, to clarify our understanding of the species found in Iowa, many of these specimens having been incorrectly named, and second, to incorporate the several name changes since the last edition …
Plants Of Mahaska County, Iowa, Daniel W. Augustine
Plants Of Mahaska County, Iowa, Daniel W. Augustine
Proceedings of the Iowa Academy of Science
During the growing season of 1938 the opportunity to collect plants of the central section of southeastern Iowa was made possible. This flora is of importance because it represents the significant floristic features of the southeastern quarter of the state. Since its purchase from the Indians 97 years ago, there has been a very definite change in the floristic aspects of this section of Iowa. This change is still taking place and is resulting in the extinction of some of the native plants in the region. However, many of these plants are still to be found in Mahaska County, although …
Insoluble Residue Of The Missouri And Virgil Series In Southwestern Iowa, Edwin H. Wenberg
Insoluble Residue Of The Missouri And Virgil Series In Southwestern Iowa, Edwin H. Wenberg
Proceedings of the Iowa Academy of Science
The younger Pennsylvanian strata of Iowa can be correlated largely on the basis of their insoluble residues. Samples were collected from exposed strata in southwestern Iowa, and adjacent parts of Missouri and Nebraska. After digestion in cold dilute muriatic acid the residues were separated by elutriation into two portions, one consisting of fragments and aggregates larger than 1/20 mm. diameter and thus suited for examination under the binocular microscope, and the other consisting of fine silts and clays. The percentages of each portion as well as the nature of the residues were used in correlation. Chert is the most diagnostic …
The Relation Of Background, Interest And Study Habit To Grades In College, A. R. Lauer
The Relation Of Background, Interest And Study Habit To Grades In College, A. R. Lauer
Proceedings of the Iowa Academy of Science
Measures were made of attitudes toward certain matters relating to college activities (Y), study habits (S) as measured by pencil and paper tests, background, (C) as measured by the Iowa State College Cultural Inventory, and the grade-point-average of 87 students (G). Correlations were computed to determine the relative importance of the factors studied. The reliability of the grades was sufficient to insure the significance of results. It is shown by multiple correlation technique that the most important item measured for prognosticating grades is interest (Y). The second important item was background (C), which is somewhat related to intelligence, and study …
1940 Old Gold, Iowa State Teachers College
1940 Old Gold, Iowa State Teachers College
UNI Yearbooks
The student yearbook of the Iowa State Teachers College, later known as the University of Northern Iowa.
Title Page - Front Matter
Proceedings of the Iowa Academy of Science
No abstract provided.
Genetic Stability Of Tomato Diploids And Tetraploids Derived From Haploid, E. W. Lindstrom
Genetic Stability Of Tomato Diploids And Tetraploids Derived From Haploid, E. W. Lindstrom
Proceedings of the Iowa Academy of Science
By doubling the chromosomes of a haploid tomato asexually (decapitation-callus technique) an absolutely homozygous diploid is produced. Ten generations of severe selection to "break" this pure line have resulted only in very minor changes, easily attributable to a normal mutation rate. Data on the effect of the selection pressure on dry weight of plants and on size and weight of fruits show no statistically significant effects in two selection lines and a barely significant ( 5 per cent point) effect in a third selection line. Only one major point-mutation was noted among the 12,000 experimental plants (a mutation to a …
Soil Moisture Content And General Plant Growth Conditions Of Eroded Soil As Infliences By Contour Furrowing, Moras L. Shubert, J. M. Aikman
Soil Moisture Content And General Plant Growth Conditions Of Eroded Soil As Infliences By Contour Furrowing, Moras L. Shubert, J. M. Aikman
Proceedings of the Iowa Academy of Science
A research program of water conservation and of soil rebuilding and maintenance has been initiated in southern Iowa as a phase of the Cooperative Hillculture project of the Iowa Agricultural Experiment station and the Soil Conservation Service. Existing and newly established vegetative covers are being evaluated as interplanting materials between the rows of larger, chiefly woody, and plants of economic value which are grown in furrows on the exact contour under varying degrees of cultivation.
Aphanorhegma Patens In Iowa, Roberta O'Harra
Aphanorhegma Patens In Iowa, Roberta O'Harra
Proceedings of the Iowa Academy of Science
In the autumn of 1939, our Botany class went on a field trip to the Iowa River Valley in Tama County near Montour. We went especially for the purpose of gathering mosses and liverworts. Upon our return, we began an examination of our specimens, and I discovered a species of the genus Aphanorhegma in my collection. It had been growing on the mud of the river bank by Kronk's bluff. There are only two known species of Aphanorhegma; one of which is patens, and the other serratum. In Iowa, the only reported species to date is the latter, serratum. The …
Chemical Transformations By Acetobacter, Nandor Porges
Chemical Transformations By Acetobacter, Nandor Porges
Proceedings of the Iowa Academy of Science
The enzymatic systems elaborated by micro-organisms permit them to catalyze chemical transformations some of which are difficult or impossible to effect by ordinary chemical methods. Although organisms induce chemical changes, the successful application of such enzymatic transformations on a practical scale necessitates, in addition to other factors, the selection of the organism appropriate for the desired reaction and the determination of the optimum conditions. The possible utilization of the fermentation products of the Acetobacter has stimulated interest in the transformations brought about by this group of bacteria. Without going into a detailed discussion, this paper indicates some activities exhibited by …
Ecological And Floristic Aspects Of Clay And Palo Alto Counties, Ada Hayden
Ecological And Floristic Aspects Of Clay And Palo Alto Counties, Ada Hayden
Proceedings of the Iowa Academy of Science
A survey of the native flora of Clay and Palo Alto Counties with reference to plants useful to waterfowl includes the plants useful for food, for nesting materials and for cover. The plants are listed systematically as well as referred to associations. The range of distribution for flora of the state has been extended and some plants apparently new to the state have been recorded.
Evaluation Of Quantitative Experiments, Melvin Mueller, R. W. Getchell
Evaluation Of Quantitative Experiments, Melvin Mueller, R. W. Getchell
Proceedings of the Iowa Academy of Science
The purpose of this evaluation of quantitative experiments for general college chemistry was; first, to learn the different types of quantitative experiments used; second, to examine the methods or instructions given; third, to run a few trials to discover the range of error expected; and fourth, to determine the cause of error in some cases. It was the aim to carry out all trials as a general chemistry student would, using a good grade horn pan balance with a $6.00 set of weights. At least three trials were run to determine the expected range of error and to give a …
The Solubility Of Anhydrous Magnesium Perchlorate In Diethyl Ether, H. H. Rowley, Frank J. Seiler
The Solubility Of Anhydrous Magnesium Perchlorate In Diethyl Ether, H. H. Rowley, Frank J. Seiler
Proceedings of the Iowa Academy of Science
In the study of the physical properties of non-aqueous solvates considerable work has been done on the systems magnesium bromide-diethyl ether (1-3) and zinc bromide-diethyl ether (4). It is planned to extend these studies to the bromides of other elements in the same periodic group as well as to related compounds. One of the authors (R) during a study of the three component system, water-diethyl ether-magnesium bromide, tried to determine the amount of water in a sample of ether solution by use of the drying agent Dehydrite, which is anhydrous magnesium perchlorate. It was noted that the magnesium perchlorate appeared …
Cyanogen Chloride With Organomagnesium Compounds, George H. Coleman, Robert W. Leeper
Cyanogen Chloride With Organomagnesium Compounds, George H. Coleman, Robert W. Leeper
Proceedings of the Iowa Academy of Science
A Grignard reagent is commonly represented by the formula RMgX. It has been established, however, that the following equilibrium exists in such a reagent (1, 2, 3). 2RMgXR2Mg + MgX2. The assumption has been made that almost without exception the reactions of RMgX and R2Mg are the same and that therefore the representation of the reagent as RMgX is permissible. One of the first exceptions noted was in the reaction between alkyl sulfonates and the Grignard reagent (4, 5, 6). In this work it was shown that each component in the above equilibrium has a different …
Plastics From Soybean Meal And Furfural, L. K. Arnold, A. D. Quackenbush Jr.
Plastics From Soybean Meal And Furfural, L. K. Arnold, A. D. Quackenbush Jr.
Proceedings of the Iowa Academy of Science
It is well known that most protein substances may be hardened to form relatively hard, tough, and water resistant materials by suitable chemical treatment. Perhaps the oldest application of this type is the tanning of leather. Much more modern and of much more popular appeal is the production of some 10,000 tons casein annually to be made into such items as buttons, buckles, fountain pens, and various novelties in an attractive array of pastel colors. While milk casein, hardened by formaldehyde, makes excellent plastics the casein is higher in cost than some available proteins so that the possibility of using …