Biology Commons^™

Combined Microspectrophotometry And Autoradiography Of Late Interphase Nuclei In Physarum Polycephalum, Joseph K. Vlchek

Master's Theses

No abstract provided.

Seasonal Changes In Morphology Of The Gonads Of The Bluegill Lepomis Macrochirus, Alan C. Roman

Master's Theses

No abstract provided.

Notes On The Algae Of Arkansas. 1. Chrysococcus, Kephyrion, Kephyriopsis, Pseudokephyrion And Stenokalyx, Richard L. Meyer

Journal of the Arkansas Academy of Science

The genera Chrysococcus, Kephyrion, Pseudokephyrion and Stonokalyx have received some consideration by investigators in Europe and in the boreal forest and tundra-range regions of the United States. Many of the species are considered to be cold-water stenotherms, thus occurring more frequently in northern habitats. In the present paper 4 species of Chrysococcus, 4 species of Kephyroin, 2 species of Pseudokephyrion and 2 species of Stenokalyx from Arkansas are discussed.

The In Vitro Synthesis Of Melanin In The Avian Pineal When Treated With D, L-Dopa, Bernadette Ann Nowicki

Master's Theses

No abstract provided.

Taxonomic Studies On The Genus Podocotyle (Trematoda: Opecoelidae), Paul Clinton Edmiston

University of the Pacific Theses and Dissertations

The original intent of this study was to reinvestigate and confirm the validity of thirteen species of Podocotyle reported from Dillon Beach, California. Eight species were described by Park (1937) and five described by Johnson (1949-unpublished). Among these species basic similarities were evident in such features as: cirrus sac, seminal vesicle, body shape, extent and distribution of vitellaria, which indicated the possibility of conspecificity. Because four of these species (Podocotly blennicottusi, P. california, P. pedunculata, and P. pacifica) were also reported from fishes of the Pacific Northwest coast by Ching (1960), Pratt and McCauley (1961), Arai (1969), and Hall and …

Lichens Of The Genus Parmelia From Columbia, Costa Rica, And Guatemala, Donald G. Flenniken

Dissertations and Theses @ UNI

During the summer of 1969 a total of eighty-four species of lichens belonging to four subgenera were collected in Colombia, Costa Rica, and Guatemala. Twelve of these are described as new. The subgenus Amphigymnia is represented by thirty-six species, three of which are described as new. The subgenus Parmelia is represented by forty-one species, eight of which are described as new. The subgenera Everniiformes and Xanthoparmelia are represented by two and five species, respectively, with no new taxa recognized. The lichen product strepsiline, previously known only in the lichen Cladonia strepsilis (Ach.) Vain., was found by microchemical tests in Parmelia …

Radio-Biotelemetry Studies Of Circadian Body Temperature Rhythms And Activity Levels [Of The] Zebra Finch (Peophilia Guttata), Vaughan Arthur Langman

University of the Pacific Theses and Dissertations

The object of this study was to determine the normal thermoregulatory patterns of zebra finches (Poephilia guttat) in as near a normal physiological and behavioral state as possible. Surface body temperature and level of activity were the two primary channels of information. Radiobioelemetry allowed the reduction of external disturbance during long periods of continuous recording.

Temperature Induced Changes In The Territorial Dynamics Of Cyprinodon Macularius Baird And Girard, Don Victor Plantz Jr.

University of the Pacific Theses and Dissertations

Behavior is qualitatively and quantitatively modified by the environment. Thus, any consideration of behavior must take into consideration the environmental conditions present. The present study evaluates the interrelationship between one environmental condition (temperature) and a measurable behavioral phenomenon (territoriality).

A Variation Of The Standard Steepest Ascent Search Procedure For Response Surface Experiments, George Whitfield Cobb

Theses and Dissertations

The results of this chapter lead to a modification of the standard stopping rule which breathes new life into the method of steepest ascent, but which is unfortunately not sufficient to effect a total resuscitation. As expected, there is no uniformly optimum stopping rule, nor even a uniformly best test statistic; both the optimum statistic and the optimum test level depend on the model parameters y1 and y2. One can, however, adopt a compromise rule which works reasonably well for all parameter combinations by testing at the 25% level with the statistic zn = 1/2(yn -yn-2). In many cases the …

The Effects Of Para-Chlorophenylalanine On A Conditioned Emotional Response In Rats, Roy J. Hartmann

Theses & Dissertations

The initial intent of this study was to investigate p-CPA's actions on conditioned "anxiety" (CER) in rats in order to ascertain whether the derived effects were qualitatively similar to those previously reported for "conflict" behavior. Specifically, the goals of this study were to determine if p-CPA would reinstate lever-pressing behavior that had been suppressed by a series of tone-shock pairings. If a change in behavior did occur, would the reintroduction of serotonin, through the use of 5-HTP, return the behavior to pre-drug control levels.

Population Variation In Fruit Material Of Acer Negundo L., Robert Williams Jr.

Masters Theses & Specialist Projects

1. Comparisons of the mean weight per hundred fruits of fourteen populations demonstrate a definite cline, seed originating from the northern habitats being heavier.

2. The fruit length, wing length and total length of the fruit material from thirteen populations increases with increase in latitude.

3. The average caloric value for all populations tested was 5,092 +/- 165 calories per gram. Due to the heavier weight of the fruit from the northern provinces, an higher energy content per fruit is indicated with increase in latitude.

4. Stratification and germination tests separate the populations into two large geographical groups with the …

The Application And Refinement Of Thin Layer Chromatographic Procedures In Analyzing The Ribonucleic Acids Present During The Morphological Development Of Two Varieties Of Avena Sativa L., Dorothy Anne Hackett

Masters Theses

No abstract provided.

Nesting And Brooding Characteristics Of Sharp-Tailed Grouse (Pedioecetes Phasianellus Jamesi Lincoln) In Southwestern North Dakota, Carter Drew Christenson

Theses and Dissertations

A study of the nesting and brood habitat preferences of sharp-tailed grouse (Pedioecetes phasianellus jamesi Lincoln) was conducted in southwestern North Dakota during the reproductive seasons of 1969 and 1970. Radio telemetry was used to monitor the spring and summer activities of seventeen sharp-tail hens. Eight brooding hens were semi-continuously radio-tracked for movement and cover selection. A quantitative and qualitative analysis of seventeen nests and eight renests was made to determine the preferred nesting cover and the effects of intensive grazing upon it .. Nests were established either in non-use areas or in areas of light to moderate grazing. These …

An Evaluation Of Student Attitudes In The Audio-Tutorial Biological Science Program At Western Michigan University And How They Are Reflected In Student Achievement Versus Time Spent In Laboratory, Dorothy Anne Hackett

Masters Theses

No abstract provided.

Variations In The Electrophoretic Mobility Of Purified Staphylocoagulase, John Elliott Hill

Biology ETDs

Coagulase production was investigated for 23 strains of Staphylococcus aureus. The coagulase from seven of these strains was purified and subjected to electrophoresis.

The dialyzable fraction of heart infusion broth was the growth medium. Coagulase was harvested from 5 hr shake cul­tures incubated at 37 c.

A series of dialysis steps lasting 24 hr at a tempera­ture of 2 C were used to purify the different coagulases. The crude coagulase was first separated from the growth med­ium by dialysis against deionized water. The coagulase was next precipitated by dialysis against a £H 3.8 acetate buf­fer which had an ionic strength …

Comparative Molt In Toxostoma Curvirostre And T. Bendirei, John L. Darling

Biology ETDs

Timing and pattern of molts were studied in two species of Southwestern thrashers, Toxostoma curvirostre and T. bendirei. Emphasis was placed upon description of the sequence of feather replacement. Adults of both species undergo a complete molt (the prebasic) following the breeding season. The pattern of molt is essentially the same in both species. However, the migratory T. bendirei completes the molt approximately one month earlier than T. curvirostre, which remains on or near the breeding grounds throughout the year. The molts of young birds of both species are also similar in pattern. A major difference is the telescoping of …

The In Utero Development Of Mouse Embryos After Cultivation In Vitro From Two-Cell To Blastocyst In 17b - Estradiol Treated Medium, Harley J. Schneider Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead state University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Harley J. Schneider, Jr. on August 27, 1970.

Comparisons Of The Antigenic Relationships Of Pollen Extracts From Ambrosia Artemisaefolia, Ambrosia Elatior, Ambrosia Psilostachya And Ambrosia Trifida, James W. Meares

Biology ETDs

The antigenic relationships of Ambrosia artemisaefolia, Ambrosia elatior, Ambrosia psilostachya, and Ambrosia trifida were studied using the techniques of gel diffusion and pas­sive cutaneous anaphylaxis. Ten gram samples of defatted pollen were extracted for 7 2 hours with Coca's solution.

Each pollen extract was standardized on the basis of total nitrogen content per ml of extract using the Kjeldahl method. Antisera were prepared by injections of the pollen extract in Freund' s complete adjuvant. Rabbits were immunized subcutaneously against each pollen extract and antisera were collected five to six weeks after immunization. Gel diffusion analysis was performed by first pouring …

Breeding Biology Of The Sage Thrasher, John Wayne Gooding

All Master's Theses

The sage thrasher, Oreoscontes montanus (Townsend), is a common bird that breeds throughout the sage brush areas of the Great Basin and from northern Arizona to southern Saskatchewan. Although it is a fairly common and conspicuous bird, almost nothing about its life history has been published. This study was conducted in central Washington during the spring and summer of 1969 and the spring and early summer of 1970. During the 1969 season, emphasis was placed on finding and tracing the phenologies of as many nests as possible in order to determine the timing of the nesting cycle. During the 1970 …

Molecular Weight Determinations Of Some Salmonella Potsdam Bacteriophage Dna's, Winston H. Richards

Loma Linda University Electronic Theses, Dissertations & Projects

Two group A phages, P9c/2 and P4/2, were studied. Their density, sedimentation velocity, and biochemical properties were compared. Their densities were determined by density gradient centrifugation in 38.3% cesium chloride. Sedimentation velocity was used to determine their molecular weights. To accomplish this, the DNA of P9c/2 and P4/2 was labeled with tritium and T₂ DNA, labeled with ³²P, was used as a standard. The DNA of P9c/2 and P4/2 was separately mixed with T₂ DNA and centrifuged in a 0-15% sucrose gradient. The molecular weights were calculated using the formula D₂/D₁= (M_{2 …}

Extraction And Partial Purification Of Neurosecretory Substances From The Suprapharyngeal Ganglion Of Lumbricus Terrestris, William D. Vandenbosch

Masters Theses

No abstract provided.

A Development Of A Supplemented Ham's F-10 Medium For The Maintenance Of Thyroid Glands: A Method For Studying The Effect Of Cortisone Acetate On I 131 Uptake, Ronald Taylor

Masters Theses & Specialist Projects

The primary purpose of this investigation is to determine whether thyroid glands may be maintained on a supplemented Ham's F-10 medium and to determine whether this tissue culture may be used under experimental conditions to study the effects of cortisone acetate on thyroidal I¹³¹ uptake.

A Study Of The Genus Potentilla In New Mexico, John D. Garcia

Biology ETDs

Studies of collections of Potentilla which I made during the summer of 1969, and from collections in The University of New Mexico Herbarium indicate that there are 24 species of Potentilla in New Mexico. These are:

P. fruticosa L. ,P. arguta Pursh, P. fissa Nutt.,P. glandulosa Lindl., P. thurberi A. Gray (and 1 variety),

P. anserina L. (and 1 variety), P pennsylvanica L.,P. plattensis Nutt., P. crinita A. Gray (and 1 variety),

P. pulcherrima Lehm. (and 1 variety), P. ambigens Greene, P. hippiana Lehm. (and 1 variety), P. diversifolia Lehm., P. sierrae-blancae Wooton and Rydb., P. bicrenata Rydb., P. subviscosa …

Comparative Age And Growth Of Two Darters, Percina Peltata (Stauffer) And Percina Notogramma (Raney And Hubbs), In Virginia, Garnett William Link

Master's Theses

Two closely related species or darters, Percina peltata and Percina notogramma, occur sympatrically in Virginia. An analysis or the number of scale annuli and standard length measurements on 447 peltata and 195 notogrannna revealed four year classes in both species, with very few individuals surviving to III-year class. Both species had approximately 1:1 sex ratios after the first year, in which males were predominant. The growth of both species was approximately the same after the first year; however peltata, the larger species, apparently gains an advantage during the first year which it never loses. The sexes did not …

The Effects Of Estradiol And Growth Hormone On Liver And Plasma Protein Of The Hypophysectomized Water Snake, Terry Chong Der

Master's Theses

The effects of estradiol and ovine growth hormone (GH) on liver and plasma protein of hypophysectomized Nat rix fasciata (southern banded water snake) were investigated. Liver and plasma protein concentrations were determined colorimetrically end expressed a mg/gm wet weight tissue.

Significant increases in liver protein levels occurred 48 and 7 hours after a single injection of estradiol in hypophysectomized animals. A single injection of GH had a like effect . Estradiol had a greater effect on liver protein levels than did GH. When estradiol and GH were administered together to hypophysectomized animals there was no apparent additive effect of the …

Distribution Of Two Lizards, Cnemidophorus Tigris And C. Scalaris, In Pine Canyon, Big Bend National Park, Texas, Ronald V. Lucchino

Biology ETDs

At the lower elevations, 3500 ft or less, in Pine Canyon, Cnemidophorus tigris and c. scalaris occupy the same general areas. Corresponding with a rise in elevation, the increase in vegetation density forces both lizards from the flat terrain into the arroyos that drain the canyon. Of the two species, only C. scalaris is found above an elevation of 4000 ft. At this elevation the coarseness of soil texture in the arroyos becomes evident and the sides of the arroyos are steeper. These changes are the result of the increase in the slope of the canyon.

Air and soil temperatures …

Review Of Die Infloreszenzen: Typologie Und Stellung Im Aufbau Des Vegetationskorpers. Zweiter Band. 1 Teil, By Wilhelm Troll. Gustav Fischer, Jena, 1969, Robert B. Kaul

School of Biological Sciences: Faculty Publications

Review of Die Infloreszenzen: Typologie und Stellung im Aufbau des Vegetationskorpers. Zweiter Band. 1 Teil, by Wilhelm Troll. Gustav Fischer, Jena, 1969.

The Ashy Petrel, Oceanodroma Homochroa, At Its Breeding Grounds On The Farallon Islands, California, Elden Aldis James-Veitch

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract not included]

Introduction:

The Farallon Islands are given as the type locality for the Ashy Petrel, Oceanodroma homochroa (Coues, 1864). Little of its biology has been studied, as information in the past has been limited to short period observations by visitors to off-shore islands along the California coast. Visitors of note were Cooper (1868), Bryant (1888), Blankinship (1892), Barlow (1894), Kaeding (1903), Emmerson (1904), Dawson (1911), Howell (1917 a and b), Loomis (1918), Thoresen (1960), and Bowman (1961).

The aim of this investigation is to provide a more detailed examination of the Ashy Petrel's breeding biology on the Farallon …

Genetic And Metabolic Controls For Sulfate Metabolism In Neurospora Crassa: Isolation And Study Of Chromate-Resistant And Sulfate Transport-Negative Mutants, George A. Marzluf

Biological Sciences Faculty Research and Publications

Mutants of Neurospora resistant to chromate were selected and all were found to map at a single genetic locus designated as cys-13. The chromate-resistant mutants grow at a wild-type rate on minimal media but are partially deficient in the transport of inorganic sulfate, especially during the conidial stage. An unlinked mutant, cys-14, is sensitive to chromate but transports sulfate during the mycelial stage at only 25% of the wild-type rate; cys-14 also grows at a fully wild-type rate on minimal media. The double-mutant strain, cys-13;cys-14, cannot utilize inorganic sulfate for growth and completely lacks the capacity to …

Ecological Distribution Of Spiny Lizards (Sceloporus) In Big Bend National Park, Texas, Teddy L. Brown

Biology ETDs

The ecological distribution of the four species of spiny lizards (Scelouorus) occurring in Big Bend National Park, Texas, was studied in the summers of 1968 and 1969. A total of 219 lizards was observed or collected by shooting with a pistol or rubber bands, by hand, and by use of can traps. The most abundant species was S. merriami (92 specimens observed or collected), second was S. poinsetti (63 specimens), third was s. magister (38 specimens), and least abundant was S. undulatus (26 specimens). Five general communities are described: Rio Grande flood­plain, desert scrub, desert grassland, pinyon-juniper-oak woodland, and ponderosa …