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The Effect Of Kinetin On The Multiplication Rate Of Blepharisma Undulans, Mary Annunciata Mcmanus, Mary Sharon Geraghty

Proceedings of the Iowa Academy of Science

Kinetin, 6-furfurylaminopuime, has been found to promote cell division in plants, and has also been reported to increase the rate of division of animal cells. In previous studies of its effect on the rate of division of Paramecium caudatum, some workers have found a stimulatory effect, whereas others have found inhibition. The effect of low concentrations of kinetin (K) on the rate of division was tested for another ciliate, Blepharisma undulans. No significant stimulation of division was found. A significant inhibition of division was found after treatment with 0.5 ppm K and with 1.5 ppm K.

Antibiotics Stimulating Or Inhibiting Germination And Growth Of Rice, Robert C. Goss

Proceedings of the Iowa Academy of Science

This report is concerned with the effect of antibiotics on germination and translocation of native chemicals in the laboratory and on the plant's reaction to certain antibiotics used as soil drenches under greenhouse conditions. The seeds treated with antibiotics active against Gram positive organisms were deficient in both carbohydrates and proteins. The seeds treated with antibiotics active against Cram negative organisms had a delayed germination but a normal physiological development. Streptomycin had the most adverse effect on translocation but stimulated germination. Analysis of variance of germination indicated that seed germination was dependent upon the antibiotic used. The analysis for the …

Reports - The Board Of Directors; Financial Statement; Staff Reports; Committee Reports; Changes In By Laws

Proceedings of the Iowa Academy of Science

No abstract provided.

Unusual Exposure Of Silurian-Devonian Unconformity In Loomis Quarry Near Denver, Lowa, Fred H. Dorheim, Don L. Kock

Proceedings of the Iowa Academy of Science

In the Loomis quarry, located in the NW1/4 sec. 29 T. 91N., R. 13W., Bremer County, Iowa, there is an unusual exposure of an unconformity between the Silurian and the Devonian sediments. Several Niagaran hummocks rise approximately 30 feet above the general Silurian level with Devonian sediments (Cedar Valley and Wapsipinicon) deposited against the Hanks of the Niagaran remnants. A basal Wapsipinicon breccia is exposed in this section. Chert from the Silurian forms an important part of the breccia.

A Late Wisconsin Giant Beaver In Northern Iowa, W. D. Frankforter

Proceedings of the Iowa Academy of Science

Few discoveries of giant beaver, Castoroides, remains have been made in Iowa and these have usually been found under circumstances precluding determination of their geologic ages. The specimen reported herein from near Garner, Hancock County, Iowa, was recovered from a peat bed which lies within the border of a late Wisconsin, probably Cary, terminal moraine. According to radiocarbon dates recently announced for organic muck overlying till in a nearby peat bog the minimum date for the till would have to be approximately 12,000 b.p., thus older than Two Creeks interstadial. This find, places the giant beaver in Iowa during Two …

Foraminiferal Paleoecology Of The Gubik (Pleistocene) Formation Of The Barrow Area, Northern Alaska, Richard W. Faas

Proceedings of the Iowa Academy of Science

A group of samples taken from various units in a drill hole at the base of the sea cliffs, about 1½ miles south of Barrow Village, Northern Alaska, have been examined to determine their foraminiferal content. Application of recent knowledge of foraminiferal distribution and ecology served to point out that possible depth changes can be observed in the fossil assemblages. Correlation of these assemblages with existing particle size distribution data to determine paleoecological conditions reveals that the sediments were deposited in relatively shallow water under open-ocean, nearshore conditions and exhibit a shoaling-innundation relationship within the units represented. Temperatures during this …

Accurate Measurement Of Relative Humidity In Field Biology, Robert E. Henshaw, Donald E. Laughlin, Alvin Wilcox

Proceedings of the Iowa Academy of Science

Measurement of relative humidity has been neglected in most biological field studies partly because of difficulty of accurate measurement. This paper reviews classical relative humidity instruments and modern electrical transducers. Accuracies and operational problems are compared. Finally several approaches to construction of electronic humidity measuring instruments are presented together with a schematic of one circuit which has been field-tested.

An Analysis Of Mite Populations In Muskrat Houses, Robert A. Buckley, Ellis A. Hicks

Proceedings of the Iowa Academy of Science

During the summers of 1960 and 1961, samples of material from muskrat houses in Goose Lake, Hamilton County, Iowa, were analyzed for their acarine content to obtain information on the factors influencing the composition of mite populations. Representatives of 18 different families or groups were obtained. Their ecology is discussed from the following relationships: (1) immediately available flora and composition of muskrat houses, (2) size of houses and occurrence of mites, (3) utility of houses and occurrence of mites, (4) sampling area of houses and occurrence of mites, and (5) the mite populations themselves.

A Test For The Identity Of "Dysoptic" With "Blind" In Mice, Margaret L. Watson

Proceedings of the Iowa Academy of Science

A genetic test for the identity of two mutants "Dysoptic" and "Blind" was made. The results of breeding point to their identity, but the results are not absolutely conclusive. A study of the Dysoptic-Blind embryo may furnish the final evidence.

Growth Of Turtles During Continual Centrifugation, Christopher H. Dodge, Charles C. Wunder

Proceedings of the Iowa Academy of Science

Juvenile Red Eared turtles (Pseudemys scripta elegans) were continuously centrifuged for as long as 9 weeks at 5 and 6 times the Earth's gravity. On a carapace-length basis growth was 159±75% more at 5 G than under control conditions (1 G). These results were contrary to those with young mice at comparable fields in which the mice displayed a slower growth rate than their controls. The nature of the response appears to be dependent upon the feeding pattern.

Effects Of The Antithyroid Drug, Propylthiouracil, On Organ Weights, Nacl Intake, And Blood Glucose Levels Of Adrenolectomized White Rats, Ross A. Madden

Proceedings of the Iowa Academy of Science

The antithyroid drug, propylthiouracil, results in anatomical changes and increase in NaCl solution intake within one week of treatment. These changes are independent of the adrenal gland. The blood glucose levels are not changed greatly with propylthiouracil treatment.

The Influence Of The Antithyroid Drug, Propylthiouracil, On Gestation And Lactation In Rats, Kenneth M. Cook

Proceedings of the Iowa Academy of Science

The anti-thyroid drug, propylthiouracil (PTU), when fed to female rats at the dietary level of 0.1% has a slight effect on the average number of young per litter if administered during the preconception period or gestation but if administered continuously during these periods results in a much lower litter size. PTU treatment of mothers during lactation results in cretin-like young and poor survival rates during lactation and after weaning. Ratios of thyroid weight to body weight indicate transfer of PTU to young during gestation and lactation.

Periodicity And Synchronicity Of Plasmodium Relictum In The Pigeon, John N. Farmer, A. Kenneth Moore

Proceedings of the Iowa Academy of Science

A strain of Plasmodium relictum, isolated from a mourning dove, is being maintained by blood passage through pigeons. Studies concerning the periodicity and synchronicity of this organism indicate the length of the asexual cycle to be 24 hours correlated with a high degree of synchronicity. Segmentation occurs between 5 and 9 PM, with sporulation occurring between 5 AM and 1 PM. The pathogenicity of the strain to pigeons is moderate, with a tendency to kill several days after the crisis of infection has passed. Exoerythryocytic schizonts have been demonstrated in several of the birds that died, with these stages tending …

A Report On A Creative Thesis Project Involving The Use Of Bisque Clay As An Original Print Form, Raymond E. George

Dissertations and Theses @ UNI

This thesis is intended to report on the possibilities of using bisque clay as a medium for expression in the area of the original print. The report is based on a series of experiments that were meant to achieve particular results. Being experimental in nature , each project afforded insight to corrections, innovations, or impossibilities as it developed.

Biology Laboratories, Facilities, And Activities In Representative Oregon High Schools, Norman D. Graybeal

Dissertations and Theses @ UNI

The laboratory activities that are included in high school biology and the laboratory facilities that are available for use in these activities will be considered in this investigation. Information for this study will be obtained from public senior high schools of the state of Oregon.

The Esterification Of 1, 3-Butanediol And Phenyl Methyl Carbinol, M. Dale Hawley

Dissertations and Theses @ UNI

Naturally occurring esters are common. The esters of glycerol and organic acids, constituting vegetable oils and animal fats, are essential to many forms of life. Esters of monohydroxy alcohols and organic acids occur in fruits and flowers and are partially responsible for their characteristic odors. Modern chemical technology has lifted the class of esters to still higher levels of importance in the lives of men. By varying the reactants and the reaction conditions, many compounds of significant industrial importance have been produced. Because of this wide applicability of esters in industry, esterification, its mechanism and kinetics, is under intensive research …

General Semantics At Work: A Handbook For High School Teachers Of English, Georgia Burge

Dissertations and Theses @ UNI

The purpose of this handbook, General Semantics at Work, is fourfold: (1) to encourage the teacher of high school English to place as much emphasis upon improving the language attitudes of his students as upon improving their language skills, on the theory that the attitudes will determine the ultimate quality of the skills; (2) to summarize the system of general semantics, which its originator, Alfred Korzybski, chooses to call "a discipline," because it not only explains but trains; (3) to discuss the nature of the three components of language attitudes; namely, (a) the language itself, the tool of the communication …

Iowa State Teachers College Schedule Of Classes, Spring 1961, 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.

Air Ion Densities In A Smoke-Filled Room, Philip J. Lorenz

Proceedings of the Iowa Academy of Science

This study was concerned with the differentiation and measurement of small, intermediate, and large ion densities in a sealed room. It was found that the background density of large negative ions exceeded that of any other class. Under conditions of tobacco smoke pollution, large ions of both positive and negative charge were the major components of the air ion population. This was accompanied by a persistent attrition of high mobility ions both during and after smoking.

The Bounty System In Iowa, David W. Waller, Paul L. Errington

Proceedings of the Iowa Academy of Science

A study of the history and functioning of the bounty system in Iowa demonstrates the legal weaknesses, costliness, and general ineffectiveness of this method of controlling undesired wildlife. The bounty laws have developed by trial and error. Early laws were simplified and primarily intended for the protection of livestock from the larger predators, notably wolves. After 1900, the program was expanded to include nuisance species and, more recently, in intended behalf of game protection. Bounty rates were changed many times in response to changes in attitudes toward troublesome wildlife and the cost of maintaining the program. Because of bounty frauds, …

An Analysis Of The Content Of Perceptual Responses To Randomly Derived Stimuli, George G. Karas, Sheldon K. Edelman, Steve Zyzanski, Don Goodrich

Proceedings of the Iowa Academy of Science

In order to understand the role of the stimulus in form perception, an analysis of perceptual responses and stimulus characteristics must be undertaken. Previous research was focused upon the characteristics of the stimulus. This study presents a first approach to categorization of response.

Objective, randomly-derived stimuli were presented tachistoscopically to Ss, who responded with their associations to the stimuli. The data suggest that the categories are meaningful ways of construing these responses. Some categories seem to be basic, while others require further differentiation. Hypotheses for future research have been obtained from these data.

A Survey Of Reptiles And Amphibians Of Buena Vista County, Iowa, James L. Christiansen

Proceedings of the Iowa Academy of Science

Snakes found, listed in order of abundance, were: Thamnophis radix haydeni, Thamnophis sirtalis parietalis, Elaphe vulpina, Thamnophis sirtalis sirtalis, Opheodrys vernalis blanchardi, and Lampropeltis doliata triangulum. Pituophis melanoleucus sayi was found in neighboring Cherokee County. Two hybrids involving the genus Thamnophis were found. Eumeces septentrionalis septentrionalis was the only lizard found, and Ambystoma tigrinum tigrinum the only salamander. Rana pipiens pipiens was the most abundant frog, and Pseudacris triseriata triseriata was the only other frog found. Bufo americanus americanus was the only toad found. Chelydra serpentina serpentina, Chrysemys picta belli, and Trionyx spinifer hartwegi were the only turtles found. There …

Field Biology At Algona High School, Summer, 1960, Joe E. Collier, George J. Balluff

Proceedings of the Iowa Academy of Science

The class was made up of seven junior and senior boys who had already successfully completed a regular one-year course in biology. The overall classroom time was 120 hours. Five hours were spent in the school and the remaining time was spent in the field. During the 5-week course, dove banding, wildlife survey of a section of land, gill-netting of fish, vegetation transect, and identification of birds, plants, fish, reptiles, amphibians, and mammals was carried on.

Reports - The Board Of Directors; Financial Statement; Staff Reports; Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

Organization Of The Centroplasm In Nostoc Pruniforme, T. E. Jensen, C. C. Bowen

Proceedings of the Iowa Academy of Science

Electron micrographs of thin sections of Nostoc pruniforme fixed in KMnO₄ and embedded in Epon consistently revealed structure in the centroplasrn. Organization of the continuous phase, as well as several kinds of included bodies, are described. Elongate structures with highly ordered, fine, lamellae stacked normal to the long axis were the most striking objects observed.

Effects Of Floods On Mammal Distribution, Sherman A. Hoslett

Proceedings of the Iowa Academy of Science

Several species of small mammals are not found in suitable habitats on broad flood-plains of the Mississippi River Valley. In the narrow up-stream flood-plains of the river valley of Northeastern Iowa, some species remain in the flooded area; others migrate out temporarily. Floods, in this case, have only a temporary effect on local populations.

Wildlife Habitats On Iowa Farms Following Application Of Soil Conservation Practices, Sylvan T. Runkel

Proceedings of the Iowa Academy of Science

The U. S. Soil Conservation Service assists Iowa farmers to plan and apply soil and water conservation practices on farm land. Farmers themselves decide which practices they will apply. Almost all soil conservation practices affect wildlife. Most of them help by stabilizing land use patterns, increasing the ecotone, and adding or protecting herbaceous and woody cover. Iowa conservation farmers are making an important contribution by establishing and maintaining conservation practices beneficial to a varied and important wildlife population.

A Study Of Blindness In The House Mouse, Margaret L. Watson, Alan Orr, Theodore D. Mcclure

Proceedings of the Iowa Academy of Science

A study of blindness in mice, heterozygous for a dominant lethal mutation is reported. The eyelids may fail to fuse in the late embryo or may open at 2 or 3 days of age. The expression of the character may be an opacity of one or both eyes, reduced size of eyeball in one or both eyes, or opacity in one with reduced size in the other. Penetrance is incomplete.

Electron Microscope Observations Of Intracellular Responses To Immobilization Antibody In Tetrahymena Pyriformis, Robert E. Henshaw

Proceedings of the Iowa Academy of Science

Through the coupling of high resolution electron microscopy with the sensitive and flexible techniques of agar diffusion it is possible to study in great detail the nature, site, and degree of intracellular damage caused by exposure to antibody. Tetrahymena is well suited for this type of study since pure cultures are readily grown axenically in the laboratory. Control cells exposed to saline solutions, neutral serum, or heterologous antiserum showed few differences from normal cells. In cells treated with homologous antibody a greatly increased number of cavities appear in the cytoplasm along Pitelka's primary meridian. It is suggested that these cavities …

Day-Night Changes After Exercise In Body Temperatures And Heart Rates Of Hamsters, G. Edgar Folk Jr., Richard R. Schellinger, Delbert Snyder

Proceedings of the Iowa Academy of Science

A day-night rhythm of body temperature in the golden hamster (Mesocricetus auratus) is described, showing a maximum of about 37.6°C in the night-animal and a minimum which is about l.3°C lower in the day-animal. The day-night difference is still present after forced exercise, indicating that the temperature-regulating mechanism, rather than muscular activity alone, accounts in part for the observed day-night rhythm of body temperature in the hamster. A day-night rhythm of heart rate was also found with a resting midnight level of 457 beats/min, and a resting noon minimum level which is about 45 beats/min lower. Apparently the hamster has …