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Effect Of Iodinated Casein And Thiouracil On The Concentrations Of Carotenoids And Vitamin A In The Blood Plasma Of Young Dairy Animals, R. S. Allen, G. H. Wise, N. L. Jacobson

Proceedings of the Iowa Academy of Science

In recent years attention has been directed to the role of the thyroid gland in the metabolism of carotene and vitamin A. Drill and Truant (1947) reported that carotene administration failed to prevent xerophthalmia in thyroidectomized rats, whereas vitamin A supplementation cured the eye lesions. Moreover, Johnson and Baumann (1947), using liver storage of vitamin A as the criterion of conversion of carotene to vitamin A, found that hyperthyroid rats accumulated larger stores of vitamin A than normal rats receiving equivalent doses of carotene, but rats rendered hypothyroid by feeding either thiourea or thiouracil stored little vitamin A. Similar experiments …

Screening Chemotherapeutants For Control Of Oak Wilt, Paul F. Hoffman

Proceedings of the Iowa Academy of Science

Oak wilt, caused by the fungus Chalara quercina H. (6), has been present in the upper Mississippi valley for many years. Warder in 1880 (10) and Tiemann in 1927 (9) reported oaks dying in Wisconsin with symptoms now recognized to be characteristic of oak wilt. Today oak wilt is known to be distributed over the entire state of Iowa with the exception of the northwestern corner. The disease is considered one of the principal problems encountered in oak production in the central hardwood region and considerable emphasis has been placed on the development of suitable control methods.

Vegetational Changes In Ungrazed Grassland At The Iowa Lakeside Laboratory., Sylvia Rudman, Richard W. Pohl

Proceedings of the Iowa Academy of Science

A tract of upland grassland, about 60 acres in extent, was purchased by the Iowa Lakeside Laboratory in 1930. This plot lies just to the north of the mess hall and dormitories of the laboratory. The property, of rough and hilly topography, rises to a height about ninety feet above the level of Little Miller's Bay on West Okoboji Lake and drains southeastward to Little Miller's Bay. Before the purchase of this tract by the Laboratory, it was heavily pastured, but had never been plowed. As the result of this grazing, Kentucky bluegrass (Poa pratensis L.) had become the …

Montmorillonite A Factor In The Breakdown Of Concrete Aggregate, Fred H. Dorheim

Proceedings of the Iowa Academy of Science

This investigation (Dorheim, 1950) was made m an effort to identify mineralogical or textural characteristics of limestones that might affect the durability of concrete. The Iowa State Highway Commission has found that when certain limestones were used as coarse aggregate in concrete, that concrete gave excellent service in paving. Other limestones that responded to standard testing procedures in a similar manner, gave very poor results when used in concrete paving.

Papers Presented At The 1951 Meeting

Proceedings of the Iowa Academy of Science

No abstract provided.

Use Of The Morphology Of Buried Soil Profiles In The Pleistocene Of Iowa, W. H. Scholtes, R. V. Ruhe, F.F. Riecken

Proceedings of the Iowa Academy of Science

Buried profiles of weathering have been recognized and utilized by many geologists in the determination and classification of Pleistocene deposits (1) * (2) (10) (20). In Iowa, Kay (5) used the term gumbotil for super drift clays. The gumbotil was found on tabular divides and other remnants of the Kansan drift plain, and was considered to be the result of weathering of glacial drift (8). Kay and Apfel (7) recognized gumbotil as a weathered product, but as something distinct from soil. For example, the Aftonian interglacial stage was stated by them as being represented in Iowa by "wide-spread Nebraskan gumbotil, …

An Apparatus For Measuring Reaction Time Under Conditions Of Preoccupation, Richard E. Frey

Proceedings of the Iowa Academy of Science

It seems axiomatic that visual, auditory, or other stimuli are not raced to as quickly when the observer is preoccupied. Students of accident prevention have pointed out that laboratory measures of re· action time are not representative of everyday life situations where preoccupation and distractions present an entirely different situation from that of controlled laboratory conditions. The present apparatus was designed to measure various response times under controlled conditions, both with and without preoccupation

Sketches Of Little Known Iowa Ornithologists, James Hodges

Proceedings of the Iowa Academy of Science

It is not a rare event when one is making a detailed study of ornithology to come upon the names of older students of the subject that are apparently unknown to the ornithological public. Their only contribution to the subject may have been a regional or local list published in some obscure periodical or a set of unpublished journals kept over a period of years. It is my purpose to make an attempt to fill in some of these "unknowns" in our knowledge of historical ornithology. This paper contains three biographies: J. H. Paarmann; Hugo H. Schroder; Burtis H. Wilson.

The Alumnus, V34n4, December 1950, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- The Obligations of Opportunity
-- The Campus Today
-- The College, Community, and Family all Share the New President's Time
-- College Needs Outlined in "Strayer Report"
-- Meet Your New Officers
-- Panther Sports Parade
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- Arts and Industries

Iowa State Teachers College Schedule Of Classes, Fall 1950, 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 Alumnus, V34n3, September 1950, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- Homecoming Timetable
-- The Campus Today
-- President Malcolm Price Resigns; Accept Education Professorship
-- Sixty-Seventh Annual Reunion Attracts Nearly 400 Alumni, Friends
-- What is School District Reorganization?
-- Panther Sports Parade...home of champions
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- The Chapel Fund...

The Alumnus, V34n2, April 1950, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- Calendar of Spring Activities
-- The Campus Today
-- Progress of the Chapel Fund
-- They like to sing
-- The Challenge to Library Work Today
--History from an Old Blackboard
-- One Hundred Attend 18th Annual Reunion for the Chicago Alumni
-- Researchers Study the "Effects" of College
-- Alumnus Named to High Position in Education
-- Panther Sports Parade
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- Campus Saddened by Loss of Two Well-Loved Staff Members
-- Plenty of Seal Liver, but ....No Chicken for Alaska Sunday Dinner

Contributions To The Ornithology Of The Upper Mississippi Valley - Pt. I. An Unpublished List By J. H. Paarmann On The Birds Of Davenport, Iowa, And Vicinity, James Hodges

Proceedings of the Iowa Academy of Science

Recently the University of South Carolina press published an outstanding volume on the avifauna of that state. In years past other states have published similar works concerning their respective avifaunas. But alas, Iowa, or the entire Middle Western region for that matter, have remained in the background. This is not apparently because of the lack of interest in its bird life, or relative abundance of observers; but simply a matter of circumstances that can be rectified only with the passing of years. The 1907 list of The Birds of Iowa by R. M. Anderson is outdated in some respects while …

The Professional Status Of The Biologist, Frank M. Semans

Proceedings of the Iowa Academy of Science

The term "biologist" may suggest a person who didn't quite succeed as a specialist, for biology after all is not a single science but a series of related sciences, whose relationships are not always obvious. The small liberal arts college biology professor and some of the naturalists have probably come closest to the category of "biologist," although neither· has been customarily designated specifically as a "biologist." In the past two decades a small number of private entomologists, usually known as "consulting entomologists," have appeared and managed in most cases not much more than barely to exist financially. Recently the term …

College Catalog 1949-1950, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

College Calendar for the year 1950-1951 ... 6
State Board of Education ... 9
Officers of Administration ... 11
Officers of Instruction ... 13
Other Officers and Assistants ... 29
Faculty Committees ... 34
General Information
Foreword ... 37
Buildings and Grounds ... 38
Enrollment and Registration ... 43
Fees ... 44
The Residence of Women Students ... 45
The Residence of Men Students ... 47
Food Service ... 49
The Commons ... 42, 49
Resume of a Student's Expenses Per Year ... 49
Employment ... 50
Partial Fee Exemptions ... 50
Student Loan Funds ... 51 …

The Alumnus, V34n1, January 1950, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- The Campus Today
-- Mason City Alumni Elect Haahr
-- 330 at Des Moines Banquet
-- Message from President Price - '...crossing swords with ignorance...'
-- Your Opportunity to Help Build...
-- Religious Director Asks - Investment in Youth and Future
-- Panther Sports Parade
-- Schedule of Winter Activities
-- 26 States, 4 Countries Send Students
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- Summary of Placements

Reports: Executive Committee; Secretary; Treasurer; Staff Reports; Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

1950 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.

Some Observations Of The Paha Of Northeast Iowa, W. H. Scholtes, Guy D. Smith

Proceedings of the Iowa Academy of Science

The loess capped ridges associated with the Iowan glacial drift plain in northeast Iowa have been called "paha" by McGee (2)*, a term used by the Dakota Indians to describe these peculiar geological formations. The paha have been described (2) as "the elongated swell of soft and graceful contour, standing apart on the plain, or else connected with its fellows sometimes in long lines, again in congeries, and locally merging to form broad plateaus." The occurrence of paha in the Iowan drift plain of northeast Iowa has been reported by several authors (1, 2, 4, 5, 6, 7, 9). Most …

Effect On Growth And Efficiency Of Food Utilization Of Quantity Of Protein And Vitamin B12 Supplementation, Edmund Wei Cheng, Byron H. Thomas

Proceedings of the Iowa Academy of Science

Certain nutritional and therapeutic values of liver extracts had been demonstrated experimentally again and again prior to 1948. Most of the early studies were related mainly to hematopoiesis (Subbarow et al., 1945), yet others were concerned with their capacity to augment the growth promoting properties of rations for chicks (Nichol et al., 1948), mice (Bosshardt et al., 1946) and rats (Jaffe, 1946; Sporn et al., 1947; Ershoff, 1947; Zucker, 1948). More recently the beneficial effects of liver extracts for hogs and poultry have been attributed to an unknown factor (s) tentatively identified as the "animal protein factor, APF." The identity …

Iowa State Teachers College Schedule Of Classes, Winter 1949-50, 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 New Program Of Teacher Education, Iowa State Teachers College

History of Education Book Gallery

The curriculum described in this brochure represents an attempt by the faculty of the Iowa State Teachers college to define a new and improved four-year curriculum for prospective public school teachers. This curriculum is the result of six years of continuing study and change and a final and thorough-going revision of the entire curricular program during the past year.

Effect Of Wave Length Bands Of Filtered Light On Germination Of Seeds Of Kentucky Bluegrass (Poa Pratensis), Louis N. Bass

Proceedings of the Iowa Academy of Science

Botanists have long known that light, supplied during the germination period, may increase germination percentages. Most studies concerning the effects of light on the germination of seeds have utilized the entire visible spectrum. Only a few workers have studied the effects of various portions of the spectrum. However, results of these studies, dealing with a number of species, have not been consistent. The effect of color of light on germination of Kentucky bluegrass seed has not been previously investigated. Since it is a light sensitive species it was felt that such a study would provide additional basic information on the …

Mechanism Of Salivary Amylase Action, John H. Pazur, Dexter French, Doris W. Knapp

Proceedings of the Iowa Academy of Science

The action of salivary amylase on amylo-type compounds is interpreted by most investigators as a random hydrolysis of the a-1, 4-glucosidic linkages. By this mode of action, intermediate reaction products which would have physical and chemical properties characteristic of the reaction mixture may be formed. The nature of these intermediates has been deduced from measurements of osmotic pressure, viscosity, iodine coloration, reducing power, etc. generally on crude enzymic digests. Investigations of this type which form the basis of the concept of random action are excellently reviewed by Hanes (9).

A Forced-Choice Rating Scale For College Instructors, A. R. Rustebakke, George D. Lovell, Charles F. Haner

Proceedings of the Iowa Academy of Science

The purpose of this study was to construct a forced-choice rating scale for evaluating students' opinions of college instructors. The scale constructed consists of 20 tetrads, or groups of 4 statements descriptive of instructors. These statements were chosen so that a pair of favorable items, both appearing to be equally favorable, and a pair of unfavorable items, both appearing to be equally unfavorable, make up each tetrad. From each tetrad the rater must choose the item most characteristic and the item least characteristic of the ratee. The reason for choosing items in this manner can be seen in Sisson's statement …

Home Range Of The Southern Woodchuck, Richard F. Trump

Proceedings of the Iowa Academy of Science

In this study of the home range of the woodchuck, Marmota monax monax (L), the mammals were live-trapped and marked with metal ear tags. Data from 65 catches of 47 specimens in Van Buren County, 1940-1941, from the writer's Master of Science thesis (Iowa State College, 1943), along with data from 58 catches of 24 specimens in Story County, 1946-1949, are incorporated in this report.

The Effectiveness Of Experienced And Inexperienced Teachers As Shown By Student Achievement, Orlando C. Kreider

Proceedings of the Iowa Academy of Science

The large number of students who enrolled in the colleges of the United States after World War II brought many unusual problems to college administrators. The influx of students was so great that the teaching personnel had to be rapidly increased. Many inexperienced teachers had to be employed. It is probable that temporary staff members included many whose training and other traits would have barred them from teaching except during such an emergency. This condition provided an excellent opportunity for testing many hypotheses that could not have been tested under prevailing college conditions in normal times. One of the important …

Some Physical Characteristics Of Wiesenboden And Planosol Soils Developed From Peorian Loess In Southwestern Iowa., Rudolph Ulrich, F. F. Riecken

Proceedings of the Iowa Academy of Science

A study by Hutton ( 1947, p. 426-31) of the gently sloping Prairie soils derived from Peorian, or Wisconsin, loess in southwestern Iowa showed that certain morphological, chemical, and physical properties are related to the thickness and distribution of the loess. Previous field studies had indicated that in a qualitative way, properties of the associated loess-derived Wiesenboden and Planosol soils also were related to thickness and distribution of the loess. The present study was undertaken to determine if quantitative information could be obtained on the functional relationship between certain soil properties, chiefly physical, and the loess distribution. The study consisted …

The Effect Of Thiouracil On The Golgi Apparatus Of The Thyroid Gland In The White Rat, Ralph H. Shepherd

Proceedings of the Iowa Academy of Science

Thiouracil, a heterocyclic derivative of thiourea related to pyrimidine, has been found to have certain goitrogenic effects as well as various other bodily effects on laboratory animals treated with the substance. The goitrogenic effects are inhibition of active thyroid hormone formation and a stimulation of gland growth. Inhibition of hormone formation is believed to be due to the combination of thiouracil with iodine (Miller, Roblin, and Astwood, 1945), and, as has been suggested, the drug may act as an antivitamin or antibiotic, since its toxic reactions are similar to those of sulfanilamide, another antivitamin (Laufer and Stewart, 1947). Stimulation of …

The Alumnus, V33n4, October 1949, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- Alumni Officers
-- The Campus Today
-- Fall and Winter Activities
-- Bureau of Publications...Changes Name and Function
-- Announce 83 New Appointments
-- State Fair Exhibit Tells...."What Makes a Good Teacher?"
-- Fuller Assumes Emeritus Status
-- Panther Sports Parade
-- Keeping Up with Alumni
-- Marriages
-- Dateline: Maracaibo, Venezuela
-- Births
-- Deaths
-- Summer Graduates Get Awards
-- Nearly 1,000 Alumni Give to Chapel Fund