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Experimental And Mathematical Techniques For Kinetic Studies Of Larval Fruit Fly Growth, William J. Moressi, William F. Herrin, Charles C. Wunder Jan 1961

Experimental And Mathematical Techniques For Kinetic Studies Of Larval Fruit Fly Growth, William J. Moressi, William F. Herrin, Charles C. Wunder

Proceedings of the Iowa Academy of Science

Techniques have been developed in our laboratory which permit the study of growth patterns under a variety of experimental conditions. The experimental subject under investigation is the larva of the common fruit fly Drosophilia melanogaster. Studies involving exposure of the organism to thermal, gravitational, electromagnetic, and magnetic agents have already been conducted. A particular advantage of employing the larvae is that they possess a relatively rapid and simple growth pattern from which experimental constants can be obtained and statistically analyzed. During their 96-hour growth period, the approximate time from the hatching of the egg to pupae formation, the larvae need …

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Food Consumption Of Mice During Continual Centrifugation, Charles C. Wunder Jan 1961

Food Consumption Of Mice During Continual Centrifugation, Charles C. Wunder

Proceedings of the Iowa Academy of Science

High gravity simulated by continual centrifugation can evoke a slower growth with mice and other organisms. For white mice a transient reduction in food intake also occurs and is believed to be, in part, responsible for the reduced growth. Fields as high as 7 G's were employed. Mice of ages which varied from one to seven weeks at the onset of exposure were studied. A more drastic decrement in food consumption occurred with the older mice at higher field intensities.

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Some Effects Of Thyroxine-Reserpine Treatment On Growth Of Mice, Lester C. Shell, Louis Farrugia, Danzil Hawes-Davis, Alexander Philip, Tom Merritt, Dan Lock Jan 1961

Some Effects Of Thyroxine-Reserpine Treatment On Growth Of Mice, Lester C. Shell, Louis Farrugia, Danzil Hawes-Davis, Alexander Philip, Tom Merritt, Dan Lock

Proceedings of the Iowa Academy of Science

Thyroxine, reserpine, and a combination of the two drugs were given to white mice over a ten-week period. Effects on growth rate were noted. Data are presented which indicate that a sequence of thyroxine for two days and reserpine for one day, with the sequence repeated over the experimental period, proved to have greatest effect on growth rate.

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Trematodes Recovered From Passerine Birds Collected In Chickasaw County, Iowa, (With Notes On Other Avian Helminths), Charles J. Ellis Jan 1961

Trematodes Recovered From Passerine Birds Collected In Chickasaw County, Iowa, (With Notes On Other Avian Helminths), Charles J. Ellis

Dissertations and Theses @ UNI

The present study is a survey of the trematodes found in passerine birds collected in the Goodale Conservation Area of Chickasaw County, Iowa, from October 1959 through August 1960. Non-trematodic infections are reported also.

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Critical Analyses Of Selected One-Act Plays For Use In Junior High School, Alice Margaret Hayes Jan 1961

Critical Analyses Of Selected One-Act Plays For Use In Junior High School, Alice Margaret Hayes

Dissertations and Theses @ UNI

Production of plays and participation in plays should be integral parts of the junior high school program today, and there is a need for a critical analysis of plays of value and worth to the age-group that comprises the enrollment in a junior high school (ages 12-14). Lists of plays are available for the senior high school and for the elementary school but few studies have been made of plays suitable for the junior high school. There is no known analysis of such plays; hence, the need for this study. To know what is meant by plays of value and …

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The Effect Of Kinetin On The Rate Of Multiplication Of Paramecia, Mary Annunciata Mcmanus, Kathleen Sullivan Jan 1960

The Effect Of Kinetin On The Rate Of Multiplication Of Paramecia, Mary Annunciata Mcmanus, Kathleen Sullivan

Proceedings of the Iowa Academy of Science

A stimulation of the rate of division of Paramecium caudatum by kinetin has been reported. This paper reports investigations in which kinetin was found to be inhibitory, rather than stimulatory, to division of paramecia under similar conditions and at the same concentrations. Addition of IAA apparently counteracted the inhibition produced by kinetin.

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Problems Of The Mechanism Involved In The Metamorphosis Of Bugula And Amaroecium Larvae, William F. Lynch Jan 1960

Problems Of The Mechanism Involved In The Metamorphosis Of Bugula And Amaroecium Larvae, William F. Lynch

Proceedings of the Iowa Academy of Science

Various treatments which induce precocious fixation or inhibit attachment of Bugula and Amaroecium larvae are reviewed. Heilbrunn's general theory of stimulation and anesthesia is thought to provide a fairly suitable explanation for the artificial induction or inhibition of metamorphosis of Bugula larvae, but the agents causing induced metamorphosis resemble those which affect cell division more than those which affect muscle contraction, a necessary correlate of the hypothesis. The hypothesis applied to Bugula larvae does not seem to offer a suitable explanation for induced metamorphosis in some ascidian tadpoles.

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Midwest, Volume 3, Number 2, Spring 1960 [Download Entire Issue] Jan 1960

Midwest, Volume 3, Number 2, Spring 1960 [Download Entire Issue]

Midwest: A Literary Review

No abstract provided.

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The Fish Net, Virginia Hudson Young Jan 1960

The Fish Net, Virginia Hudson Young

Midwest: A Literary Review

No abstract provided.

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Direct And Indirect Measurements Of Arterial Blood Pressure In Normal And Propylthiouracil-Treated Rats, Lloyd Hoffman Jan 1960

Direct And Indirect Measurements Of Arterial Blood Pressure In Normal And Propylthiouracil-Treated Rats, Lloyd Hoffman

Proceedings of the Iowa Academy of Science

Systolic and diastolic blood pressures were lowered in male rats by treatment with 0.1 percent dietary propylthiouracil for a period of ten to twelve weeks. At the best comparison levels systolic pressure measurements of experimental rats dropped 15.0 percent by the indirect method and 26.9 percent by the direct method when compared to the levels of control rats. The diastolic values of experimental animals dropped 18.3 percent as measured by the indirect method and 28.9 percent as measured by the direct method when compared to controls. Thus, the hypothyroid state induced by the drug propylthiouracil is accompanied by reduced systolic …

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Effects Of Suspended Animation On The X-Irradiation Syndrome, James P. Robbie Jan 1960

Effects Of Suspended Animation On The X-Irradiation Syndrome, James P. Robbie

Proceedings of the Iowa Academy of Science

Male albino mice in a condition of suspended animation were X-irradiated with a dosage of 2,000 r. These animals showed a remarkably greater resistance to the X-rays than did controls that were X-irradiated only. The animals that had been in suspended animation often lived twice as long as the controls. However, in many cases they died from shock shortly after being revived.

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Table Of Contents Jan 1960

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

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Invited Address - The Role Of Water Quality, Gordon E. Mccallum Jan 1960

Invited Address - The Role Of Water Quality, Gordon E. Mccallum

Proceedings of the Iowa Academy of Science

It is a real pleasure to be back on this campus and particularly at this time of year. It is certainly an honor and a privilege to speak before this distinguished gathering. A portion of your program has dealt with the staggering complexities which scientists face in getting man safely into outer space and back to earth. My discussion will point up another complex challenge in maintaining an earthly resource affecting the health and well-being of all mankind. Only this week a spokesman at the National Watershed Congress in Washington stated that wise use of our water resource can mean …

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Reserpine, Chlorpromazine, And Physiological Functions Of Mammals That Hibernate, G. Edgar Folk Jr., Harry M. Frankel, Mary A. Folk Jan 1960

Reserpine, Chlorpromazine, And Physiological Functions Of Mammals That Hibernate, G. Edgar Folk Jr., Harry M. Frankel, Mary A. Folk

Proceedings of the Iowa Academy of Science

Since two of the tranquilizing drugs, chlorpromazine and reserpine, are believed to act upon the hypothalamus, and since mammals that hibernate are presumed to have a different hypothalamus from non-hibernating laboratory animals, a logical design was to study the effects of these two drugs on bats, hamsters, mice, and white rats. The bats were more resistant than mice to reserpine. Hamsters did not show hypothermic effects with either drug at room temperature, except as reflected in the heart rate under reserpine. In a cold environment when rats and hamsters were compared, effects were opposite in respect to both core temperature …

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The Effect Of Temperature And Light Upon The Phenotypes Of Some Collembola, Mary F. Willson Jan 1960

The Effect Of Temperature And Light Upon The Phenotypes Of Some Collembola, Mary F. Willson

Proceedings of the Iowa Academy of Science

Of five species reared under different conditions of temperature and light, only Hypogastrura matura exhibited a phenotypic difference. This difference was in the relative lengths of the furcula and the head and appeared to be a matter of selective survival rather than a direct response of the phenotype to the environment.

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An Ecological Reconnaissance Of The Bottom Fauna, Millers Bay, Lake Okoboji, Philip T. Clampitt, Elizabeth L. Waffle, Richard V. Bovbjerg Jan 1960

An Ecological Reconnaissance Of The Bottom Fauna, Millers Bay, Lake Okoboji, Philip T. Clampitt, Elizabeth L. Waffle, Richard V. Bovbjerg

Proceedings of the Iowa Academy of Science

The bottom fauna and related ecological factors were investigated in a bay of Lake West Okoboji, Iowa, during the summer of 1959. Two contiguous areas were compared: (1) a relatively small, shallow bay largely enclosed by land and partially separated by a narrow sand spit from (2) a larger, deeper bay opening into the major lake basin. Data include particle size analysis and organic content of substratum, and qualitative and quantitative distribution of more than 50 species of macroscopic bottom animals. Density and bio-mass of animals were calculated at 14 stations. Chironomids (Diptera) were the dominant group in the study …

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Invited Address - The Possible Role Of The Coronary Flow In Determining Myocardial Oxygen Consumption, William J. Whalen Jan 1960

Invited Address - The Possible Role Of The Coronary Flow In Determining Myocardial Oxygen Consumption, William J. Whalen

Proceedings of the Iowa Academy of Science

When Dr. Thielen first contacted me in connection with this talk, I thought I would discuss some factors that influence the strength of contraction of heart muscle, including human heart muscle. (By including data from humans I felt I could stay within the framework of the general topic of today's seminar.) However, since that time I have been writing a paper on some of my work with isolated strips of heart muscle. This work concerns the relation of the oxygen consumption of the heart to the strength of its contraction, the frequency at which contraction occurs (the heart rate), and …

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Histological And Histochemical Study Of The Roots Of Zamia Floridana And The Endophytic Alga Contained In Them, Ronald Meyer Jan 1960

Histological And Histochemical Study Of The Roots Of Zamia Floridana And The Endophytic Alga Contained In Them, Ronald Meyer

Proceedings of the Iowa Academy of Science

Some of the epigean roots are found to contain an endophytic blue-green alga, Anabaena cycadearum; others are free of algae but are later invaded. Normal roots and algal-free roots possess a diarch protostele; algal-infected roots have a triarch protostele. The normal root has an epidermis which in the other roots is sloughed off and replaced by a leathery phelloderm. The algal-infected root contains in the mid-cortex a wide area filled with algal cells and spanned at infrequent intervals by starch-free layer, radially elongated cortical cells. The algal-free root contains a starch-free layer of cells in the mid-cortex which are believed …

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Effects Of Capillary Permeability On Tracers In The Blood, Victor W. Bolie, Neal R. Cholvin Jan 1960

Effects Of Capillary Permeability On Tracers In The Blood, Victor W. Bolie, Neal R. Cholvin

Proceedings of the Iowa Academy of Science

Numerous advantages arise from a concise mathematical formulation of the influence of capillary permeability on tracers in the blood. The paper deals with a theoretical description of the depletion of a blood-borne tracer under the combined influences of the reversible process of transcapillary diffusion and irreversible processes such as renal excretion and first-order enzymatic degradations. Numerical calculations are illustrated graphically to show application of the theory to typical tracer dilution problems.

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Comparative Study Of Effects Of Gravity On The Growth Of Hamsters And Mice, Stanley R. Briney, Charles C. Wunder Jan 1960

Comparative Study Of Effects Of Gravity On The Growth Of Hamsters And Mice, Stanley R. Briney, Charles C. Wunder

Proceedings of the Iowa Academy of Science

Syrian golden hamsters appear to withstand gravitational stress better than white mice. When these animals were subjected to four weeks of continual centrifugation at four times the Earth's gravity (4 G's), both showed a definite decrease in body mass during the first week, then a subnormal growth rate for the remaining three weeks of exposure as compared to their controls living within the Earth's gravity (1 G).

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An Ecological Catalog Of The Lake Okoboji Gastropods, Richard V. Bovbjerg, Martin J. Ulmer Jan 1960

An Ecological Catalog Of The Lake Okoboji Gastropods, Richard V. Bovbjerg, Martin J. Ulmer

Proceedings of the Iowa Academy of Science

A five year survey was made of the gastropods of Lake West Okoboji, Iowa. Only 11 species comprise the present fauna, a remnant of what was earlier in this century several times larger. These species are: Amnicola limosa (Say), Amnicola lustrica Pilsbry, Ferrissia rivularis (Say), Gyraulus parvus (Say), Helisoma trivolvis (Say), Lymnaea reftexa Say, Lymnaea obrussa Say, Menetus exacuous (Say), Physa gyrina Say, Physa sayii Tappan, and Valvata tricarinata (Say). These are now confined to areas less than 10 meters in depth with numbers of species and densities much greater in the bays than in the main body of the …

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Plant Communities Of Southeastern Iowa, Robert A. Davidson Jan 1960

Plant Communities Of Southeastern Iowa, Robert A. Davidson

Proceedings of the Iowa Academy of Science

Twenty-four localities, or general habitat types, in southeastern Iowa and their associated plant communities are identified.

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The Influence Of The Antithyroid Drug, Propylthiouracil, On Reproduction In Rats, Kenneth M. Cook Jan 1960

The Influence Of The Antithyroid Drug, Propylthiouracil, On Reproduction In Rats, Kenneth M. Cook

Proceedings of the Iowa Academy of Science

The antithyroid drug, propylthiouracil (PTU), when fed to white rats at the dietary level of 0.1 percent PTU in finely ground laboratory chow for ten weeks prior to mating, does not affect the ability of either male or female rats to reproduce. All metabolic evidences examined indicate a lower metabolism under the influence of PTU. The PTU dietary treatment was ceased at conception of PTU females. Characteristics of the offspring did not differ from those produced by mothers maintained on normal laboratory chow throughout the experiment.

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Altered Growth Of Animals After Continual Centrifugation, Charles C. Wunder Jan 1960

Altered Growth Of Animals After Continual Centrifugation, Charles C. Wunder

Proceedings of the Iowa Academy of Science

Two different animals have demonstrated an accelerated growth after prolonged centrifugation. This report is primarily concerned with larvae of the common fruit fly, Drosophila melanogaster, after 24 hour periods of centrifugation at fields between 2200 and 3300 G's. Similar studies are reported for the laboratory white mouse, Mus musculus after seven days of centrifugation at 7 G's. The faster growth is possibly due to more efficient growth, resulting as an adaptation to greater gravity. Such a suggestion is supported by the finding that centrifuged larvae exhibit a reduced oxygen requirement for growth.

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Some Aspects Of Quantitative Histology Of The Liver Of A-Jax Mice Before And During Tumor Induction With Carbon Tetrachloride, Paul A. Meglitsch, Robert R. Mote, Leland P. Johnson Jan 1960

Some Aspects Of Quantitative Histology Of The Liver Of A-Jax Mice Before And During Tumor Induction With Carbon Tetrachloride, Paul A. Meglitsch, Robert R. Mote, Leland P. Johnson

Proceedings of the Iowa Academy of Science

The proportion of the cell populations composed of parenchymal, littoral, and other types of cells is reported for control mice, mice repeatedly anesthetized, mice fed with olive oil repeatedly, and mice fed with carbon tetrachloride and olive oil, showing that the cellular components undergo a marked change when carbon tetrachloride is administered. The proportion of the liver volume occupied by parenchymal cells is found to be relatively stable throughout the period of tumor induction. The nuclear-cytoplasmic ratio of parenchymal cells is found to fall with the aging of control mice and those fed olive oil or anesthetized during the period …

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Epizootiology Of Trichiniasis In Wildlife From A Southcentral Iowa Area, W. J. Zimmermann, E. D. Hunnard, L. H. Schwarte, H. E. Biester Jan 1960

Epizootiology Of Trichiniasis In Wildlife From A Southcentral Iowa Area, W. J. Zimmermann, E. D. Hunnard, L. H. Schwarte, H. E. Biester

Proceedings of the Iowa Academy of Science

Sixteen species of wildlife, comprising 1,925 specimens, were examined for Trichinella spiralis during the 1953-1960 period. Species found to be infected with parasites were rat, fox, mink, raccoon, and badger. Initially a high incidence of trichinae was found in the rat, fox, and mink, followed by a marked decline. There is some evidence of a cyclic occurrence in mink. The possible significance of wildlife reservoirs as vectors of trichiniaisis to grain-fed swine is discussed.

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Some Mammal Remains From A Jackson County Cave, James M. Trosky, Emmett Polder Jan 1960

Some Mammal Remains From A Jackson County Cave, James M. Trosky, Emmett Polder

Proceedings of the Iowa Academy of Science

Excavation of a trench in the floor of a cave at Springbrook, Jackson County, Iowa, yielded bones of nine species of mammals. At a depth of 19 to 24 inches the jawbone of a porcupine and the upper right canine tooth of a black bear were found. There are no museum records of either species in Iowa. Intermingled with these remains were clam shells and ashes probably left by cave dwelling Indians. Historical literature indicates that the bear probably was extinct in Iowa before the Civil War and the porcupine before the advent of white settlers.

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Cottontails With "Horns", Arnold O. Haugen Jan 1960

Cottontails With "Horns", Arnold O. Haugen

Proceedings of the Iowa Academy of Science

Published information on papillomas, commonly called horns, on cottontails (Sylvilagus floridanus) in Iowa dates back to 1907. Specimens of horned rabbits are on record from Woodbury, Pottawattamie, Cherokee, Franklin, and Boone counties. Those from the last two counties were necropsied at Iowa State University in 1958 and 1959-60, respectively. Information from conservation officers and biologists shows sight records for a number of years past for at least 16 additional counties. The malady seems to be limited almost entirely to the western half of the state.

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A Case Of Rattlesnake Poisoning In Iowa With A Description Of Early Symptoms, Christopher H. Dodge, G. Edgar Folk Jr. Jan 1960

A Case Of Rattlesnake Poisoning In Iowa With A Description Of Early Symptoms, Christopher H. Dodge, G. Edgar Folk Jr.

Proceedings of the Iowa Academy of Science

The circumstances surrounding a bite by a swamp rattlesnake on the finger of the author are recorded. The symptoms and the treatment are described, and the possibility that other field workers might be bitten is discussed.

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An Electrophoretic Analysis Of Normal And Pathological Sera, Joan Lee Socknat Jan 1960

An Electrophoretic Analysis Of Normal And Pathological Sera, Joan Lee Socknat

Proceedings of the Iowa Academy of Science

The technique of closed-strip filter paper electrophoresis was used to analyze and compare normal and pathological human sera, and to study the effects of age, species, and stress on animal sera. Problems encountered were overcome by varying pressure, buffer, dye, electrodes, sources of voltage of electric current, and the denaturing and dyeing process.

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