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Demonstration Of The Transition From The Particle Approach To The Wave Approach, Richard T. Johnson Jan 1963

Demonstration Of The Transition From The Particle Approach To The Wave Approach, Richard T. Johnson

Proceedings of the Iowa Academy of Science

This article describes a demonstration, suitable for elementary physics, to show the transition from the particle to the wave approach. Standing waves in a continuous string are approximated by particles fastened to a much lower density or "massless" string. The agreement between the continuous and discrete systems is good, and the wave approach is shown to be only another way of describing systems.

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Developments In Superconductivity, Douglas Finnemore Jan 1963

Developments In Superconductivity, Douglas Finnemore

Proceedings of the Iowa Academy of Science

Key experiments leading to our present understanding of superconductivity are reviewed.

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Stabilization Of Gravelly And Stony Soils With Lime, Fly Ash And Sodium Carbonate, Coleman A. O'Flaherty, Donald T. Davidson Jan 1963

Stabilization Of Gravelly And Stony Soils With Lime, Fly Ash And Sodium Carbonate, Coleman A. O'Flaherty, Donald T. Davidson

Proceedings of the Iowa Academy of Science

Although the use of lime, fly ash and sodium carbonate in the stabilization of fine grained soils has been extensively investigated, there has been relatively little work done in connection with coarse-grained Iowa soils. The main purpose of this investigation was, therefore, to study the effect of the addition of lime and fly ash upon two coarse-grained soils and a coarse-grained artificial mixture of soil and crushed stone. The effects resulting from using two different types of lime and a trace chemical activator, sodium carbonate, are also evaluated. It was found that gravelly and stony soils can be satisfactorily stabilized …

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Notes On Comparative Tolerance Of Some Iowa Turtles To Oxygen Deficiency (Hypoxia), Christopher H. Dodge, G. Edgar Folk Jr. Jan 1963

Notes On Comparative Tolerance Of Some Iowa Turtles To Oxygen Deficiency (Hypoxia), Christopher H. Dodge, G. Edgar Folk Jr.

Proceedings of the Iowa Academy of Science

Six species of Iowa turtles (including pharyngeal water-pumpers and non-pumpers) were tested for resistance to anoxia. Five species of juveniles were included in the series. With the exception of Trionyx, adult aquatic turtles tolerated hypoxia longer than juveniles of the same species. Some terrestrial species were as tolerant as some aquatic species. Maximum tolerance time submerged (18° to 19°C) was 56 hours for an equatic species, Chrysemys picta, whereas that of a terrestrial species, Terrapene ornata, was 12 hours.

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Solar Protons And Their Geophysical Effects, S. M. Krimigis Jan 1963

Solar Protons And Their Geophysical Effects, S. M. Krimigis

Proceedings of the Iowa Academy of Science

In this paper, a review of the present state of knowledge of solar particle emission is given, and the effect of this emission in geophysical phenomena is analyzed. It is pointed out that the particle emission can be categorized into (a) continuous plasma emission and (b) occasional emission of solar cosmic rays. The plasma emission mainly determines the shape of the magnetospheric boundary, whereas the cosmic ray emission accounts for the geomagnetic storms, intense aurorae, ionization of the upper atmosphere, and Forbush decreases in the primary cosmic radiation. In addition, some of the remaining fundamental questions to be investigated in …

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Effect Of Irradiation On Nissl Granules In Rat Spinal Cord Neurons - A Pilot Study, S. D. Miroyiannis, B. A. Raines, V. Jurczenko Jan 1963

Effect Of Irradiation On Nissl Granules In Rat Spinal Cord Neurons - A Pilot Study, S. D. Miroyiannis, B. A. Raines, V. Jurczenko

Proceedings of the Iowa Academy of Science

Literature concerning the structure and function of Nissl granules and the effect of irradiation on the central nervous system is reviewed. Four groups of rats were irradiated in the lower thoracic spinal region, using doses of 600 r, 900 r, 1200 r, and 4200 r respectively. Higher doses of the irradiation caused depletion of the Nissl granules and other effects on the nerve cells. Increasing chromatolysis was found with increasing doses of irradiation. These findings warrant further study.

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Relative Mitochondrial Volume In Liver Cells Of A/Jax Mice Under Influence Of Carbon Tetrachloride, Jim N. Tone, Leland P. Johnson Jan 1963

Relative Mitochondrial Volume In Liver Cells Of A/Jax Mice Under Influence Of Carbon Tetrachloride, Jim N. Tone, Leland P. Johnson

Proceedings of the Iowa Academy of Science

The purpose of this study was to determine the relative volume of mitochondria in situ in hepatic cells adjacent to the interlobular veins in the livers of normal A-Jax mice and of A-Jax mice fed carbon tetrachloride dosages for varying periods of time. The liver tissues were fixed in Regaud's fluid, sectioned at 3 microns, and stained with iron haematoxylin. A procedure developed by Meglitsch et al. was utilized in determining the relative mitochondrial volume of the hepatic cells. The following were determined in the study: (1) normal mice older than six weeks possessed a greater relative mitochondrial volume in …

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Acarine Fauna Of Bird Nests, Ellis A. Hicks, Robert T. Brown Jan 1963

Acarine Fauna Of Bird Nests, Ellis A. Hicks, Robert T. Brown

Proceedings of the Iowa Academy of Science

In summer, 1961, 10 nests, representing seven species of passeriform birds, were collected and processed in Berlese funnels to obtain the mites present. Representatives of 20 different families or superfamilies were identified in addition to five groups of larvae and nymphs which could not be identified to family. The families Eremaeidae and Dermanyssidae were most widely represented, and dermanyssids were most numerous. Mite populations are believed to become established in nests by (1) mites being brought into the nest by way of nest materials, (2) mites being brought into the nest on the bird itself, and (3) mites in their …

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The Effects Of 600 Roentgens Of X-1 Irradiation On The Nuclei Of Mouse Liver Cells, Laverne Boldhaupt Jan 1963

The Effects Of 600 Roentgens Of X-1 Irradiation On The Nuclei Of Mouse Liver Cells, Laverne Boldhaupt

Proceedings of the Iowa Academy of Science

Four methods were employed to detect a change in the parenchymal nuclei of liver cells in 8 = week old female A-Jax mice after receiving 600 roentgens of localized X-irradiation. These methods were: (1) determination of the percentage of parenchymal cell volume made up of nuclear material by means of the Chalkley point = ratio method, (2) estimation of the actual nuclear volume by means of camera lucida drawings, (3) estimation of the number of nuclei per cc of tissue, and (4) estimation of the ploidy distribution of the nuclei as inferred from nuclear volumes. Irradiated and non-irradiated mice were …

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The Western Hog-Nosed Snake (Heterodon Nasicus Nasicus Baird And Girard) In Southeastern Iowa, Christopher H. Dodge Jan 1963

The Western Hog-Nosed Snake (Heterodon Nasicus Nasicus Baird And Girard) In Southeastern Iowa, Christopher H. Dodge

Proceedings of the Iowa Academy of Science

Two specimens of the western hog-nosed snake (Heterodon nasicus nasicus Baird and Girrard) are reported from a sand prairie in Louisa County, Iowa. Also reported from the same locality is a specimen of the eastern massasauga (Sistrurus catenatus catenatus Rafinesque).

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Return Of Pigment In Regenerative Tissue After Inhibition By Phenylthiourea, Francis Clare Ladd Jan 1963

Return Of Pigment In Regenerative Tissue After Inhibition By Phenylthiourea, Francis Clare Ladd

Proceedings of the Iowa Academy of Science

Inhibition of melanogenesis in larval cells of five amphibian species (two genera) was attained by phenylthiourea treatment. Buff-colored granules were demonstrated in cells of three species, gray granules in two. Pigment returned five to fifteen minutes after withdrawal of PTU. The delay is thought to be due to the time needed for the autocatalytic formation of some dihydroxyphenylalanine, which with tyrosinase is required for melanogenesis, as reported by Lerner and Case. Results obtained with living cells were corroborated by study of fixed material. The data support an origin within the Golgi complex or endoplasmic reticulum.

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Viability Of Trichinella Spiralis Larvae Stored In Serum, W. J. Zimmerman, John Mathews Jan 1963

Viability Of Trichinella Spiralis Larvae Stored In Serum, W. J. Zimmerman, John Mathews

Proceedings of the Iowa Academy of Science

Studies were made to determine the viability of Trichinella spiralis larvae stored in immune and nonimmune swine sera at refrigerator and room temperatures. In trial 1, the trichinae were maintained at room temperature in immune sera for 14 days with only slight reduction in viability, while 7 days storage in nonimmune sera reduced infectivity by nearly 50%. All trichinae were noninfective in both types of sera at 28 days. Room temperature storage in trial 2 gave no loss in viability after 7 days storage in nonimmune sera while infectivity for trichinae stored 7 days in immune sera was 33% of …

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An Inexpensive Microscope Llluminator, Donald G. Delisle Jan 1963

An Inexpensive Microscope Llluminator, Donald G. Delisle

Proceedings of the Iowa Academy of Science

Adequate lighting is often a problem when using microscopes without integral illumination. The lamp described is constructed of inexpensive and easily obtainable parts. It provides ample light for four student microscopes at considerably less cost than most currently available units.

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Officers, Iowa Academy Of Science Jan 1963

Officers, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.

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Proceedings Of The Seventy-Fifth Meeting Of The Iowa Academy Of Science At Iowa State University, Ames, April 19 And 20, 1963 Jan 1963

Proceedings Of The Seventy-Fifth Meeting Of The Iowa Academy Of Science At Iowa State University, Ames, April 19 And 20, 1963

Proceedings of the Iowa Academy of Science

No abstract provided.

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In Memoriam: Paul Lester Errington; Hiram S. Doty; Stuart C. Peterson; Harry M. Hines; Dorothy Miller Matala Jan 1963

In Memoriam: Paul Lester Errington; Hiram S. Doty; Stuart C. Peterson; Harry M. Hines; Dorothy Miller Matala

Proceedings of the Iowa Academy of Science

No abstract provided.

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Plant Communities Of The Loess Bluffs Of Northwestern Iowa, Jack L. Carter Jan 1963

Plant Communities Of The Loess Bluffs Of Northwestern Iowa, Jack L. Carter

Proceedings of the Iowa Academy of Science

No abstract provided.

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Additions To The Vascular Flora Of South Central Iowa, Reldon Beck Jan 1963

Additions To The Vascular Flora Of South Central Iowa, Reldon Beck

Proceedings of the Iowa Academy of Science

A field survey of Warren County made during the months of April, May, and June of 1962 identified over 200 collections of flowering plants. During the fall of 1962 a survey of the Red Rock Dam area identified over 50 collections of flowering plants. Simpson College Herbarium specimens of these areas were carefully checked and annotated. In these collections, 17 species were found that had not been previously published for these areas.

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The Vegetation Of The Glacial Border During The Wisconsin Maximum, L. J. Eilers Jan 1963

The Vegetation Of The Glacial Border During The Wisconsin Maximum, L. J. Eilers

Proceedings of the Iowa Academy of Science

The climate of the glacial boundary during the Wisconsin maximum was generally cooler and moister than at present. There is some evidence that a frost climate prevailed for some time at the glacial margin, suggesting that a tundra-like vegetation existed there. Pollen profiles indicate that a Picea-Abies forest existed south of the glacial margin and probably extended up to it during periods of climatic amelioration.

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A Study Of Photosynthesis In Clear Lake, Lowa, Cornelius I. Weber Jan 1963

A Study Of Photosynthesis In Clear Lake, Lowa, Cornelius I. Weber

Proceedings of the Iowa Academy of Science

The oxygen and carbon-14 methods were used to measure photosynthesis in Clear Lake, Iowa during 1958 and 1959. Differences in the rates of photosynthesis at widely separated stations were generally small. Daily variations in the rate of photosynthesis were not greater than two-fold. The correlation between the rate of photosynthesis and the incident illumination was 0.81, and the efficiency of utilization of incident light energy was 0.72 per cent. The net gain of organic matter at the phytoplankton level during the period May 1 to November 1 was equivalent to 3480 pounds of glucose per acre.

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The Influence Of Bicarbonate Ios Concentration On Cell Division And Cell Orientation Of Pediastrum, Joseph S. Davis Jan 1963

The Influence Of Bicarbonate Ios Concentration On Cell Division And Cell Orientation Of Pediastrum, Joseph S. Davis

Proceedings of the Iowa Academy of Science

Disorientation of daughter colonies of Pediastrum was induced by reduction of the bicarbonate ion concentration in the culture medium. Threshold values were established for disorientation by the use of two sources of bicarbonate ions. Below these threshold values daughter colonies were disoriented; above them, oriented. When placed in new solutions having bicarbonate ion concentrations above the threshold values, colonies which were disoriented by bicarbonate ion deficiency produced oriented daughter colonies. When placed into new solutions having higher bicarbonate ion concentrations, colonies cultured in solutions with bicarbonate ion concentrations above threshold values increased cell divisions in the mother cells and hence …

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Studies On The Possible Transmission Of Trichopyton Equinum By The Common Stable Fly, John L. Richard Jan 1963

Studies On The Possible Transmission Of Trichopyton Equinum By The Common Stable Fly, John L. Richard

Proceedings of the Iowa Academy of Science

Stomoxys calcitrans failed to transmit Trichophyton equinum from infected to uninfected susceptible ponies and from infected to uninfected guinea pigs. Flies that had fed on lesions caused by this strain of T. equinum could not be demonstrated to carry the fungus. T. equinum was shown to be viable in the skin lesions by cultural methods and tissues of the lesions were shown to be infectious for guinea pigs.

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Occurrence Of A Nucleolar-Like Body In Lotus Corniculatus L., E. A. Wernsman Jan 1963

Occurrence Of A Nucleolar-Like Body In Lotus Corniculatus L., E. A. Wernsman

Proceedings of the Iowa Academy of Science

A genotype of the variety Empire Lotus corniculatus L. was found containing an organelle which appeared as an extra nucleolus within the nucleus. In microspore mother cells this organelle first appeared at early prophase I, staining much more intensely than the normal nucleolus and remained until mid-diakinesis, at which time it disappeared. This cycle coincided with that of the normal nucleolus. It has not been determined if the nucleolar-like body arises from a nucleolar organizer as does the normal nucleolus. This organelle was not associated with any chromosome in 16 per cent of the microspore mother cells examined at stages …

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The Demonstration Of Mitotic Figures In Green Algae, William R. Bowen Jan 1963

The Demonstration Of Mitotic Figures In Green Algae, William R. Bowen

Proceedings of the Iowa Academy of Science

Wittman's aceto-iron-haematoxylin stain was combined with Hoyer's mounting medium in a rapid method for demonstrating mitosis in the green algae. Both filamentous and unicellular forms were killed, fixed, and stained in one step with the self-mordanting stain. Cells were then washed with acetic acid and transferred directly to the water-soluble Hoyer's medium. Slides prepared in this manner are permanent. Chlorophyll was bleached from the algal cells by this medium. This revealed the stained nuclei and mitotic figures. This simplified technique is particularly suitable for student use.

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Changes In Training For Teachers Made Necessary By Cba, Andrew Stevenson Jan 1963

Changes In Training For Teachers Made Necessary By Cba, Andrew Stevenson

Proceedings of the Iowa Academy of Science

In summary, surveys conducted at the State University of Iowa have revealed the following points that lead to a single conclusion: 1) Science teachers in Iowa are generally eager to improve their courses and their teaching. 2) Science teachers desire help from the colleges in securing appropriate training in order to approach the "new" science courses. 3) New graduates of most colleges and Universities feel wholly inadequate about teaching the new courses. 4) Apparently considerable reorganization of college curricula is necessary to provide certified teachers who would be ready to teach the CBA course (and presumably the other new courses). …

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The Dipole Moment Of Styrene, Joseph E. Plamondon, R. J. Buenker, Dennis J. Koopman, Robert J. Dolter Jan 1963

The Dipole Moment Of Styrene, Joseph E. Plamondon, R. J. Buenker, Dennis J. Koopman, Robert J. Dolter

Proceedings of the Iowa Academy of Science

The dipole moment of styrene, calculated from eighteen solutions ranging in weight fraction from 0 - 100%, was found to be 0.181 D. The method and results of the measurement were compared to the method and results of Petro and Smyth for the same compound. It was concluded that the atomic polarization in styrene in small, and thus is taken into account by the measurement of the molar refraction at the sodium D line. It was further proposed that the relatively large dipole moments of trans-p, βdinitrostyrene and trans-p, βdicyano-styrene may be due, at least in …

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Measurement Of Thermal Properties By The Arc Image Furnace, W. R. Mcmahon, D. R. Wilder Jan 1963

Measurement Of Thermal Properties By The Arc Image Furnace, W. R. Mcmahon, D. R. Wilder

Proceedings of the Iowa Academy of Science

A number of imaging furnace systems and sources are discussed with emphasis on the carbon arc image furnace. Several potential applications of the carbon arc image furnace in high temperature research are described and a new method of heat capacity determination is discussed.

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Sulfonation Of Bathophenanthroline And Bathocuproine, Richard L. Cryberg, Harvey Diehl Jan 1963

Sulfonation Of Bathophenanthroline And Bathocuproine, Richard L. Cryberg, Harvey Diehl

Proceedings of the Iowa Academy of Science

Diphenyl-l, 10-phenanthroline, introduced in 1952 as a spectrophotometric reagent for iron by Smith, McCurdy and Diehl (1) , has proved useful and popular; some twenty papers (2) have now appeared detailing its application to the determination of iron in sea water, wine, serum, urine, various metals, and other materials. This reagent was given the common name Bathophenanthroline. The great sensitivity of the reagent is made peculiarly useful by virtue of the solubility of its red, ferrous derivative in isoamyl alcohol, for extraction of the red compound from water into the immiscible solvent provides a concentration method making possible the determination …

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Natural Area Conservation In Iowa, S. Galen Smith Jan 1963

Natural Area Conservation In Iowa, S. Galen Smith

Proceedings of the Iowa Academy of Science

Natural areas are being rapidly destroyed throughout the world and especially in Iowa with its intensive agriculture. Natural areas are valuable as sources of research materials, for documentation of accomplished research, for teaching, and for recreation. Through cooperative action between public and private organizations, many natural areas have been preserved in Iowa. However, recreational and other use of these areas may destroy their natural values. It is important that many more natural areas be preserved by such organizations as The Nature Conservancy as well as the state. Of particular value are teaching and research areas near schools, unusual habitats with …

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Notes On The Biology Of The Jackrabbit In Iowa, Paul D. Kline Jan 1963

Notes On The Biology Of The Jackrabbit In Iowa, Paul D. Kline

Proceedings of the Iowa Academy of Science

White-tailed jackrabbits, Lepus townsendii campanius Hollister, are found throughout Iowa with the exception of a few southeastern counties. Over much of their range they are relatively rare. They appear in greatest abundance on the recently glaciated soils in northern and central counties, and on the Missouri loess soils of the west-central counties. Dry growing seasons seem conducive to hare abundance; populations decline during wet seasons. Jackrabbits provide considerable hunting sport during winter. Their pelts are utilized in felt manufacture and their flesh as a staple food for ranch mink. They are known to eat sprouting corn and soybeans, and occasionally …

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