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Biosystematic Evidence For Hybridization Between Lysimachia Quadriflora Sims And Lysimachia Hybrida Michaux (Primulaceae), Michael Owen Dillon

Dissertations and Theses @ UNI

Putative hybrids between Lysimachia guadriflora and L. hybrida were discovered in a marsh in Dickinson County in northwest Iowa. No previous reports of interspecific hybridization between these species were found in the literature. Ecological barriers usually separate the parental species; however, at this population, disturbances by grazing animals and yearly fluctuations in the water level allow them to exist sympatrically. The parental species have concurrent flowering periods, similar floral morphology and pigmentation, and are pollinated by non-specific pollinators. The disturbances also provide a wide range of microhabitats intermediate to those of the parents. Thus, hybridization has resulted because of the …

Mosquitoes Of Black Hawk County, Iowa, Martin Burdett Christiansen

Dissertations and Theses @ UNI

Mosquito populations of Black Hawk County, Iowa, were studied during the summers of 1970 and 1971. The primary sampling technique was the New Jersey light trap with supplementary collections of biting adults to determine species of importance to man. Twenty-two species of mosquitoes were collected in the county. This represents ten species more than had been previously reported from Black Hawk County. Information is presented on the relative abundance and seasonal succession of each species. Aedes vexans (Meigen) and A. trivittatus (Coquillett) were the primary pests of man, occurring from June through August. Aedes sticticus (Meigen) ranked as the third …

The Effects Of Estrogen On Ionized Calcium In Ovariectomized Calciphylactic Rats, Edward Luverne Hatcher

Dissertations and Theses @ UNI

This research was an attempt to discover the relationship between estrogen treatment and the serum calcium levels in ovariectomized rats. An attempt was also made to study the possible effects of estrogen on calcium deposition during the calcification process by utilizing the calciphylaxis phenomena as a potential biological model. Concentrations of ionized and total calcium in the serum of ovariectomized rats were measured utilizing a calcium selective electrode system and atomic absorption spectroscopy procedures respectively. This was done following 3- and 6-day treatments with estrogen (0.1 µg). The same analysis was used in the calciphylactic treatment procedures both with and …

Gastrointestinal Bacteria Of A Healthy Sheep, Paul Berger

Biology ETDs

Various portions of the gastrointestinal tract of a healthy sheep were sampled to determine the types of bacteria indigenous to the different areas. These portions included the abomasum, duodenum, jejunum, ileum, cecum, ascending colon, spiral colon, and descending colon. A minimum test set technique was developed and used to identify the bacteria. No definite pattern emerged when one region was compared with another region, although the total bacterial count for both the abomasum and the duodenum was less than that of the other locations sampled. Escherichia coli and an infrequent E. freundii were the only enteric bacteria found in the …

Ua77/1 Western Alumnus, Vol. 40, No. 2, Wku Alumni Relations

WKU Administration Documents

Quarterly magazine created for WKU alumni. Regular features are Hilltopics, Sports, Alumni Newsgrams and Notes and In Memoriam. This issue includes:

• Graduate School (College) is On Its Way
• Evening Class is Thataway
• The Hilltopper Hundred to the Rescue
• ETV - Keep Watching, It's All in Color
• Student Interns Learn How Government Works
• Significant Statements: The New Year Begins
• Good News for Fishermen: Reservoir Research
• There it Was! Your Homecoming - 1971
• Performing Arts Illuminate the Campus Scene
• Discovery 1 - Uncovering the Kentucky of Antiquity
• Discovery 2 - Reviving the Heritage of Kentucky
• Discovery 3 - The Intercultural Studies Program …

Absorption And Translocation Of Chelated Iron By Barley And Rice, Ching-Chang Eugene Li

Biology ETDs

A study was made of iron absorption and translocation in the Mimi variety of barley and the Saturn variety of rice. Various iron chelates were used as sources of iron in nutrient solutions. Radioactive iron was used in some experiments to investigate absorption and translocation of iron in both plant species.

Plants were grown in nutrient solutions with different levels of iron to compare the chlorophyll content, dry weight and iron content in shoots and roots. It was found that iron deficiency decreased chlorophyll content and iron content in tissue and also decreased growth of the shoots and roots. An …

The Constant Estrus Rat As A Source Of Viable Ova, John C. Drake

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 John C. Drake, Jr. on September 10, 1971.

Extracellular Production Of Coagulase, Deoxyribonuclease Acid Phosphatase, Alkaline Phosphatase, And Lipase By Staphylococcus Aureus, Robert Lee Nelson

Biology ETDs

The activity of extracellular coagulase, deoxyribonuclease, acid phosphatase, alkaline phosphatase and lipase for 10 strains of Staphylococcus aureus was investigated. The enzymatic activities were also tested for the presence of a specific enzyme inactivator. The relationship of EH and cell density to the five enzymes was also studied.

The extracellular enzymes used in these experiments were prepared by removing cells by centrifugation from the broth of O, 6, 12, 24, 36, 48, and 60 hr cultures. Cell numbers were determined by the standard plate count method. Inactivation of specific enzymes was measured by mixing equal volumes of 6 hr broth …

Coexistence In Unisexual-Bisexual Species Complexes Of Poeciliopsis (Pisces: Poeciliidae), William S. Moore, Frances E. Mckay

Biological Sciences Faculty Research Publications

All-female forms of Poeciliopsis rely on males of closely related bisexual species for sperm. The natural habitat of Poeciliopsis in Sonora, Mexico, consists of a variety of small ponds connected by intermittent watercourses. Optimal areas, containing mixed female aggregates, are defended by territorial males. Social structure in natural populations very closely resembles that of laboratory experiments, wherein subordinant males show reduced mate discrimination and inseminate unisexuals.

An equation relating male density to unisexual inseminations is used in a computer simulation model of a population. A stable equilibrium is inherent in unisexual-bisexual species complexes but the level of equilibrium is affected …

Vocalizations Of The Townsend Chipmunk (Eutamias Townsendii), Greig Michael Warner

Dissertations and Theses

This study describes and analyzes the vocalizations of the Townsend chipmunk (Eutamias townsendii) in Oregon. Tape recordings of calls were collected primarily from Forest Park in Portland (Oregon) during 1970 and 1971, and sonograms of these recordings were produced. Findings were compared with those of Brand (1970) who investigated E. townsendii vocalizations in California. The prominent calls in the vocal repertoire of townsendii are the quist, the quirt, and the chipper. These calls all appear to be warning calls. The quist note is a a chevron-shaped (A) figure representing a sound which begins at a low frequency (1-2 KC), sharply …

Serological Studies On Twelve Species Of Candida, Etta W. Fraser

Theses & Dissertations

The studies on the serology of Candida emphasize the fact that their antigenic structure is complicated. The results of the agglutination, precipitin reactions and complement fixation tests are confusing, contradictory and, so far, too impractical for the clinical laboratory. This study is an attempt to clarify the situation by using the newer techniques of the Ouchterlogy agar gel-diffusion precipitin method, (18) the hemolysin method, as well as the usual agglutination procedure. Since the precipitin method appears of possible value in diagnosis, this will be the main emphasis in this work.

Participation Of The Renin-Angiotensin System In The Control Of Vascular Capacity During Hemorrhagic Hypotension, James Robert Powell

Masters Theses

Introduction

Review of the Literature

Severe hypotension has long been held as being one of the most potent stimuli for activation·of the mechanisms responsible for circulatory homeostasis. It has been accepted that the most immediate response to hypotension involves activation of the autonomic nervous system causing an increased vascular tone. In addition to various neurogenic mechanisms that function to cause an increase in vascular tone, several humeral mechanisms have also been implicated.

Rocha e Silva and Rosenberg (1969) described the release of vasopressin (ADH) from the posterior lobe of the pituitary in response to hemorrhage in the dog. They postulated …

A Biosystematic Study Of Cacalia Atriplicifolia L. With Emphasis On Its Life History, Tso Pen Chang

Masters Theses

No abstract provided.

Effects Of The Cle Elum Reservoir On The Ephemeroptera (Mayflies) Of The Cle Elum River, David Bruce Ainsworth

All Master's Theses

The purpose of this study was to determine the physical and chemical effects of the Cle Elum Reservoir on the Cle Elum River and to evaluate these effects in respect to the Ephemeroptera of the Cle Elum River. Specific objectives were: (1) To determine the effects of the reservoir on current velocity, volume of flow, turbidity, and temperature. (2) To determine the effects of the reservoir on alkalinity, hardness, dissolved oxygen, and pH. (3) To evaluate the effects of the reservoir on the Ephemeroptera of the Cle Elum River.

The Riparian Vegetation Of Swauk Creek, Edward L. Schneider

All Master's Theses

An investigation was made to document the structure and composition of the flora along Swauk Creek, a riparian transect into Central Washington's Cascade Range. Distributions of the major species are discussed and a key has been constructed to facilitate identification of the riparian associations.

The Relation Of Temperature To Calcification In Montipora Verrucosa, Walter W. Cox

Loma Linda University Electronic Theses, Dissertations & Projects

A method for quantitatively comparing calcification rates in coral was used to find an optimum growth temperature for Montipora verrueosa. This method is based on the uptake of the radioactive isotope ca⁴⁵. By supplying the water the corals are growing i·n with a known amount of radioactivity and comparing this with the activity of the coral samples, a rate of Ca⁴⁵C0₃ incorporation can be determined per unit of time.

Various tests show that inorganic exchange does not appear to be a significant factor in interpretation of the results obtained. The edge of a colony calcifies …

An Extension Of The Cochran Q Test, Soo-Young Cho

Loma Linda University Electronic Theses, Dissertations & Projects

The familiar x ² test is ordinarily used to compare percentage distributions of categorical data for two or more independent samples. A more accurate com parison of the percentages is sometimes obtained if the samples consist of matched individuals. The NcNemar test is generally used when comparing only two related samples. Where there are three or more samples the Cochran Q test is used. Both of these tests apply only to the case of dichotomized responses. This thesis extends the Cochran Q test to the case where the responses are multinomial. A generalized statistic corresponding to Cochran's result is obtained. …

An Investigation Of The Behavior Of Citellus Townsendii Townsendii (Bachman) In Central Washington, Mark Roy Fuller

All Master's Theses

This study of the behavior of Citellus townsendii townsendii was based on field observations of animals at their northern most distribution. The squirrels' seasonal activity and behavioral repertoire, when considered with environmental parameters, suggest important adaptations for survival. The animals were in torpor from about July to February. Activity generally occurred during the midmorning hours, allowing them to avoid temperature extremes. Quantitative analysis of behavioral observations indicated that most activities occurred in a non-random order.

Change In Cysteine And Total Basic Amino Acid Contents In Regenerating Planaria, Lynn Gunnison

Masters Theses

No abstract provided.

The Ecology And Behavior Of The Burrowing Owl In Central New Mexico, Dennis J. Martin

Biology ETDs

A population of Burrowing Owls (Speotyto cunicularia) in Central New Mexico was studied during 1970 and 1971. Individuals of this population nest in Rock Squirrel (Spermophilus variegatus) burrows in an arroyo and railway cut-through. Physical aspects of burrows used by these owls were measured and comparisons were made with other nesting colonies. Sixty-seven Burrowing Owls were banded to facilitate investigations of behavior, population dynamics and migration. Burrowing Owl vocalizations were examined with the aid of a Sonagraph. Statements are made as to their physical description, etiology, function, ontogeny, relationship to other calls and associated behavioral displays. Descriptions of the owl's …

The Effect Of Dimethylsulfoxide On The Infectivity Of The T1-Coliphage, Grergory Kyle Reeder

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 Gregory Kyle Reeder on July 22, 1971.

Characteristics Of A Bacteriophage Isolated For Pseudomonas Tabaci, Linda R. Nichols

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 Linda R. Nichols on July 19, 1971.

Biomechanical Relationships In Astragalus And Oxytropis (Fabaceae), Stephan L. Albrecht

Biology ETDs

The results of a biomechanical study of the generic relationships of Astragalus and Oxytropis are presented.

Dried plant materials was hydrolyzed in 2 N hydrocholoric acid, the hydrolysates were extracted with n-amyl alchol, and chromatographed in two dimenstions using thin layer chromatography (TLC). The patterns and the R_F values of the "spots" separated were recorded and analysed.

The flavonoid patterns for all the plant organs studied were similar and no definite relationships between the flavonoid patterns and morphological characters could be ascertained. The flavonoid patterns exhibited by the members of both taxa indicate that the present means of morphological …

The Embryonic Viability Of The Constant Estrus Mouse, Claudia M. Hicks

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 Claudia M. Hicks on July 8, 1971.

Phytoplankton Composition At Lake Drummond In The Dismal Swamp, Virginia, William Howard Poore Jr.

Biological Sciences Theses & Dissertations

Abstract unavailable.

Intestinal Absorption And Lipolysis Of Safflower Oil And Other Unsaturated Vegetable Oils In Rats, Robert Leslie Gregory

Master's Theses

The intestinal lipolysis and absorption of safflower, corn, peanut, olive, cottonseed and soybean oils were studied in the rat. Oils and pancreatic lipase were injected into the rat jejunum and ileum (ligated in situ), and the amount of esterified fatty acids absorbed and free fatty acids present in the gut after 3 hours was determined.

Safflower oil was absorbed significantly less than the other oils. There was no significant difference between the absorption rates of the other oils. When the oils were subjected to porcine pancreatic lipase in vitro, safflower oil also exhibited the lowest rate of hydrolysis.

The rates …

A Comparative Study Of Solubilized Proteins From Phycomyces Blakesleeannus By Disc Electrophoresis, Douglas Burton Gillespie

Master's Theses

Mycelial, sporangiophore, and zygospore solubilized protein fractions o Phycomyces blakesleeanus Burgeff were separated on polyacrylamide gels and stained. Protein patterns of 8 and 13 day old mycelia of the + strain were identical as were the patterns of the same two age groups of the - strain. The + mycelia exhibited 9 protein bands while the - strain contained 10 bands. Seven bands were homologous to both strains. Sporangio­phore samples of 5 and 10 day old cultures from + and - strains contained 4 protein bands homologous to all 4 samples. The protein band at 9 mm was also …

The Induced Differentiation Of Mouse Ectoderm To Epidermis By Growth On Freeze-Thawed Dermis, Albert Joseph Banes

Master's Theses

Previous investigators have grown or maintained adult or embryonic skin in tissue culture and on the chorioallantoic membrane (CAM) of chickens. These studies have revealed two important factors involved in culturing skin: (1) the presence of an inducer which originates in the dermis and affects the phenotype of epithelial cells; and (2) the influence of the physical surface of the substrate on which epidermis is cultured.

The current investigation presents evidence that ectoderm from the limb buds of 10 to 12 day-old mouse embryos can form an epidermis when combined with dermis killed by alternate freezing and thawing, and cultured …

Investigations Of Biochemical Relationships In New Mexico Ribes (Saxifragaceae), John G. Mexal

Biology ETDs

The classification of Ribes based on morphological characters is hampered by interspecific similarities. Nine species found in New Mexico were studied chemotaxonomically on the basis of flavonoid variability and content. A soxhlet extraction apparatus was used to extract the flavonoids. Methanolic extracts of both fresh and preserved leaves were studied using thin-layer chromatography. The results supported the current subgeneric breakdown of Ribes into Ribesia and Grossularia. Ribesia contains between two and four anthocyanins, while Grossularia contains no detectable anthocyanins. Evidence presented in this paper indicates that R. aureum Pursh (Ribesia) and R. inerme Rydb. (Grossularia) are misplaced subgenerically. Biochemically, at …

Effects Of Insulin, Sodium And D-Glucose On Amino Acid Absorption In The Intestine Of Rats, Andre-Gerard Craan

Dissertations and Theses

Amino acid absorption across rat intestine in vitro was inhibited or stimulated by insulin depending on the hormone serosal concentration.

The absence of sodium ions from the incubating solution resulted in a significant decrease of L-alanine absorption. However, L-alanine was enhanced in a sodium-free medium by the addition of insulin on the serosal side of the intestine.

A sizable decrease in L-alanine and L-lysine absorption was produced by introduction of D-glucose (0.2 % and 2 %) in the Krebs-Ringer's incubating buffer. Nevertheless, the presence of D-glucose did not prevent the stimulatory effect of insulin on amino acid absorption.