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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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Scattering Of Electromagnetic Waves In The Troposphere And The Use Of This Technique For Communications, Irvin H. Gerks Jan 1960

Scattering Of Electromagnetic Waves In The Troposphere And The Use Of This Technique For Communications, Irvin H. Gerks

Proceedings of the Iowa Academy of Science

This article is an introduction to the subject of tropospheric scatter propagation for the non-specialist. It opens with a review of various modes of propagation which may exist in a non-turbulent atmosphere, such as diffraction and ionospheric reflection. The scattering of energy in a turbulent medium is then examined, and statistical methods are introduced to describe the resultant field. Special characteristics of the signal are discussed, such as variation with distance, climatic effects, frequency dependence, fading, bandwidth, and noise level. The paper concludes with a description of methods and equipment employed in the design of a communication system operating over …

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Stroboscopic Study Of Motion, Joseph Ball Jan 1960

Stroboscopic Study Of Motion, Joseph Ball

Proceedings of the Iowa Academy of Science

A stroboscopic method for demonstrating Newton's three laws of motion is described. By means of a camera and mechanical stroboscope, photographs are made from which measurements are taken to justify these laws.

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Proceedings Of The Seventy-Second Meeting Of The Iowa Academy Of Science Held At The State University Of Iowa, Iowa City, April 22 And 23, 1960: Minutes Of The 1960 Meeting Jan 1960

Proceedings Of The Seventy-Second Meeting Of The Iowa Academy Of Science Held At The State University Of Iowa, Iowa City, April 22 And 23, 1960: Minutes Of The 1960 Meeting

Proceedings of the Iowa Academy of Science

No abstract provided.

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Error Terms Of Numerical Integration Formulas, Robert J. Lambert Jan 1960

Error Terms Of Numerical Integration Formulas, Robert J. Lambert

Proceedings of the Iowa Academy of Science

This paper gives a proof that the polynomial function Qn (s) = ∫so t(t-1) (t-2) • • • (t-n)dt does not change sign on the interval (O,n). Heretofore it was generally believed that Qn (s) changed sign on the interval (O,n) when n was an odd integer. The technique of proof is to show that when n is odd, Qn (s) has an upper bound Qn (n-1) for (n-1)/2 ≤ s ≤ n which is shown to be negative. This result simplifies the treatment of the error terms in certain numerical integration formulas which …

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Studies Of Complexes Of The Transition Metals Iv. Cobalt Complex With Dithiomalonate, Ronald L. Brubaker, William A. Deskin Jan 1960

Studies Of Complexes Of The Transition Metals Iv. Cobalt Complex With Dithiomalonate, Ronald L. Brubaker, William A. Deskin

Proceedings of the Iowa Academy of Science

The cobalt (II) ion and the dithiolmalonate ion form a complex which is reasonably stable in aqueous solution and highly colored. Studies were conducted by means of spectrophotometric methods in the visible region. The composition of the complex and the overall formation constant were determined using the method of continuous variation of Job and successive dilutions of stoichiometric proportions of the ligand and metal. All measurements were made at room temperature with the solutions kept at a constant ionic strength of 0.1. The results indicate the composition of the complex to be that of three moles of ligand to one …

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Notes On Hibernating Bats In Dubuque County Caves, Ted J. Muir, Emmett Polder Jan 1960

Notes On Hibernating Bats In Dubuque County Caves, Ted J. Muir, Emmett Polder

Proceedings of the Iowa Academy of Science

In the fall and winter of 1958 and 1959 four species of bats, Myotis lucifugus, Myotis sodalis, Eptesicus fuscus, and Pipistrellus subftavus, were found in five Dubuque County caves. M. sodalis was a new species record for Iowa. Migration of bats into the caves began when the minimum temperature dropped to 24° F. The greatest increase in cave population occurred when the daytime high temperature was below freezing and nighttime lows ranged from 13° F. to 1° F. Midwinter copulation of E. fuscus was observed, and drinking of condensed water on cave ceilings by M. lucifugus was noted. No intercave …

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Newtonian And Galilean Reference Frames (Of The Special Theory Of Relativity) Defined And Compared By Elementary Mathematics, C. Jake Wolfson Jan 1960

Newtonian And Galilean Reference Frames (Of The Special Theory Of Relativity) Defined And Compared By Elementary Mathematics, C. Jake Wolfson

Proceedings of the Iowa Academy of Science

The stated reference systems are mathematically defined using three dimensional Cartesian coordinates and sets of functions, and then systematically developed and contrasted. The linearity of the Lorentz transformation equations for special relativity is shown to follow directly from the definition of a Galilean inertial reference system.

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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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Accidentally On Purpose, Robert Frost Jan 1960

Accidentally On Purpose, Robert Frost

James Hearst Documents

The poem Accidentally on purpose by Robert Frost sent as a Christmas greeting in 1960.

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Spoken At The Memorial Service For Ruth Suckow, H. W. Reninger Jan 1960

Spoken At The Memorial Service For Ruth Suckow, H. W. Reninger

Midwest: A Literary Review

No abstract provided.

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Effect Of Gibberellic Acid On Oats, K. J. Frey Jan 1960

Effect Of Gibberellic Acid On Oats, K. J. Frey

Proceedings of the Iowa Academy of Science

Oat plants were sprayed with gibberellic acid in concentrations of 10 ppm, 100 ppm, 1000 ppm, and 2,500 ppm at 24 hours before and 24 and 144 hours after anthesis. The application 24 hours before or after anthesis caused 10 percent to 50 percent elongation of the upper internodes. Weight of the primary kernels was depressed approximately 10 percent and that of the secondary 15 percent. The effect upon seed size was independent of time of application or concentration.

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Matty, Virginia Hudson Young Jan 1960

Matty, Virginia Hudson Young

Midwest: A Literary Review

No abstract provided.

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In Memoriam - Frank E. Brown; Charles Harvey Brown; Samuel Wheeler Edgecombe; W. Merle Robinson; Bruce F. Stiles; John A. Schulz; Lester Yoder; Thomas W. Zbornik Jan 1960

In Memoriam - Frank E. Brown; Charles Harvey Brown; Samuel Wheeler Edgecombe; W. Merle Robinson; Bruce F. Stiles; John A. Schulz; Lester Yoder; Thomas W. Zbornik

Proceedings of the Iowa Academy of Science

No abstract provided.

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Development Of The Helicoid Andscorpioid Cymes In Myosotis Laxa Lehm. And Mertensia Virginica L., Paul V. Prior Jan 1960

Development Of The Helicoid Andscorpioid Cymes In Myosotis Laxa Lehm. And Mertensia Virginica L., Paul V. Prior

Proceedings of the Iowa Academy of Science

The vegetative and inflorescence apices of Myosotis laxa and Mertensia virginica have been compared and contrasted in order to determine how helicoid and scorpioid cymes differ in development. The apices have been interpreted on the basis of the tunica-corpus theory, since no clear histogenic layers could be determined for these species. The stem apex enlarges and broadens at the onset of flowering, and apical dominance is lost. The number of tunica layers is reduced in both cases, and the enlargement of the apex is found to be due to more, not larger cells. The helicoid cyme of Myosotis laxa results …

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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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Carbonate Concretions In The Karlicher Loess Profile, Rheinland, E. Rosauer, J. Frechen Jan 1960

Carbonate Concretions In The Karlicher Loess Profile, Rheinland, E. Rosauer, J. Frechen

Proceedings of the Iowa Academy of Science

A loess profile near the town of Karlich in the Rhein-land of Western Germany contains various forms of carbonate which are described in detail. A systematic relationship concerning a transition from finely divided grains of carbonate to large complex concretions is given. The stratigraphic presence of three distinct zones of carbonate concretions and the results of analysis for carbonate content in the entire profile are presented as additional evidence for a ternary (and possibly a quaternary) climatic differentiation of the most recent glacial stage in the Middle Rhein region.

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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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Notes On The Chemotherapy Of Hexarnitiasis, W. C. Mcguire, N.F. Morehouse Jan 1960

Notes On The Chemotherapy Of Hexarnitiasis, W. C. Mcguire, N.F. Morehouse

Proceedings of the Iowa Academy of Science

A method for controlled evaluation of drugs against Hexamita meleagridis in turkeys is presented. Experiments evaluating selected drugs and reevaluating all compounds and antibiotics previously reported to be efficacious against this species are described. Most of these compounds were tested against two separate isolates of this parasite, one from Indiana (1950) and the other from Wisconsin (1959). All preparations found effective against one isolate showed similar efficacy against the other. Conversely, preparations ineffective against one isolate were also ineffective against the other. Among the compounds showing efficacy were several antibiotics and dibutyl tin salts. Dibutyl tin dilaurate was found to …

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Some Blood Parasites From Birds In Central Iowa, John N. Farmer Jan 1960

Some Blood Parasites From Birds In Central Iowa, John N. Farmer

Proceedings of the Iowa Academy of Science

During 1957, 1958, and 1959, blood smears from 568 birds were examined. Ninety-nine (17.25%) of these birds were found to harbor haemosporidian parasites. Four species of birds harbored Plasmodium, four species were infected with Leucocytozoon, and five species with Haemoproteus. Trypanosomes and microfilariae were observed in two species.

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Self-Inhibition Of Germination Of The Conidia Of Peronospora Manshurica, Vernyl D. Pederson Jan 1960

Self-Inhibition Of Germination Of The Conidia Of Peronospora Manshurica, Vernyl D. Pederson

Proceedings of the Iowa Academy of Science

Percentage germination of the conidia of Peronospora manshurica (Naum.) Syd. ex Gaum. was inversely proportional to their concentration on the surface of water agar. It appeared that the adverse effect of high concentration on germination was due to an inhibitor associated with the conidia. The inhibitor diffused readily in water, was lost after exposure to air for a few days, but accumulated when the conidia were stored anaerobically.

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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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Members Of The Iowa Academy Of Science Jan 1960

Members Of The Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.

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English 1, Olive Hambly Jan 1960

English 1, Olive Hambly

Midwest: A Literary Review

No abstract provided.

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