Biology Commons^™

Seasonal Effects On Blood Pressure, David C. Dotson

Masters Theses

The relationship of seasons and blood pressure was investigated. The individuals in the sample groups were of two types: normal individuals and individuals who have been diagnosed as hypertensives and under medical supervision. This was a seasonal study? measurements were taken during midsummer and early fall, 1979. Factors constituting the variable for individual differences included: sex, age, genetic factors, diet, general body build and managerial vs, laborer workload.

Individual differences were controlled by use of a randomized complete block design with each individual constituting a block. Season was the treatment factor, and individual was the blocking factor. Measurements were taken …

A Histopathological Study Of The Effect Of Ethylnitrosourea On Ha(Icr) Mice Testes, Mildred Rodriguez

Masters Theses

Ethylnitrosourea (ENU) is very strongly mutagenic, carcinogenic and teratogenic in mice. In the present study ENU was used to induce germ cell damage in the mouse testis. Mice were given single injections of vehicle, 50, 100, or 200 milligrams of ENU per kilogram of body weight and killed at various times over a fifteen week period. Microscopic examination of the testes showed that extensive killing of spermatogonial cells and therefore maturation depletion had occurred in the seminiferous tubules. The histopathology was dose dependent and the testicular weight decreased with an increasing ENU concentration.

Glycosaminoglycans Of Normal And Diabetic Human Plasma, Gloria Badiner

Masters Theses

Diabetic complications in nnn-insulin dependent tissues have led < researchers to investigate causitive parameters at the biochemical level. The purpose of this project was to measure glycosaminoglycans in diabetic and normal human plasma and to investigate any changes in glycosaminoglycan content for possible roles in diabetic complications.

Glycosaminoglycan content was measured by three methods; the alcian blue assay, protein-bound hexosamine, and total glycosaminoglycan isolate methods. Results show IDDM plasma to have significantly increased levels of glycosaminoglycans as assayed by the alcian blue test and protein-bound hexosamine. The total glycosaminoglycan isolate method did not correlate with either of the two other methods. No difference was demonstrated between normal and NIDDM plasma glycosamino glycan content.

The protein-bound hexosamine and the alcian blue assays correlate with age and type of diabetes. No differences between the sexes were demonstrated. Of particular interest are …

Seasonal Movements Of White-Tailed Deer In East-Central Illinois, James E. Chelsvig

Masters Theses

No abstract provided.

A Study Of Habitat Preference For The Aestivation Of The Alfalfa Weevil Hyper Postica (Curculionidae: Coleoftera), Donald D. Myers

Masters Theses

Habitat prefernce for the aestivation of Hyper postica was researched by the sampling of field borders. Sampling methods by the sampling of field borders. Sampling methods included soil and vegetative litter collection, sweeping of borders with an insect net and emergence trapping of wooded and grass habitat. Fields were swept once a week to determine if H. postica returned to the field before the winter season. The methods resulted in the following findings: Weevils do not aestivate litter. Data from sweeping indicated that weevils prefer areas that include alfalfa and grasses. Results of observations implied that there is a direct …

An Analysis Of Salt Eating In Birds, Kathryn Julia Herson

Masters Theses

No abstract provided.

Biological Studies On Some Ghanats Of Iran, Fardin Oliaei

Masters Theses

The present study was undertaken to monitor the quality of drinking water in the ghanats of Tehran during 1978-1979. Four sites were chosen, and various limnological parameters were investigated.

Physical-chemical analyses were evaluated to determine the composition of the water. There was no significant pollution related to chemical-physical parameters.

Planktonic samples were analyzed with the aid of a Sedgewich-Rafter counting cell. A total of 47 genera were found in all four ghanats.

The planktonic population declined dramatically in winter. Mean diversity and equitability of the algae showed no significant level of pollution and degradation in the study areas.

Bacterial content …

Effects Of Selenium On 1, 2-Dimethylhydrazine (Bmh) Metabolism And Dna Alkylation, Philip Robert Harbach

Masters Theses

No abstract provided.

A Comparative Anatomical Study Of The Pineal Gland In Mammals, Nishi Bala Sood

Masters Theses

No abstract provided.

The Effects Of Pre And Postnatal Gonadal Hormone Administration On The Adult Aggressive-Target Biting In Female Mice, David D. Smith

Masters Theses

Introduction

It is now well established that androgens and estrogens are intricately involved in influencing the sexual differentiation of the brain, as well as male and female differences of aggressiveness. Evidence is accumulating which indicates that these steroid hormones influence the pattern of nervous connection and organization developing in utero and in the early postnatal period.

To more completely link testosterone's involvement with aggressive behavior, one must examine the voluminous literature which links testosterone with developing neonatal correlates of aggression as well as with adult capacity to display aggressive behavior. In most species the male is more aggressive than the …

A Study Of Schistosomiasis In The Mizurata Area, Libya, Abubaker I. Swehli

Masters Theses

No abstract provided.

Habitat Utilization And Partitioning Within A Community Of Nesting Grassland Birds, John E. Buhnerkempe

Masters Theses

No abstract provided.

The Influence Of Food On Induction Of Males In Daphnia Pulex, Paul Henry Schreuder

Masters Theses

Introduction

Daphnia pulex Leydig (Crustacea, Cladocera) is a common component of the zooplankton of freshwater lakes and ponds. Its importance in the aquatic trophic structure as food for small fish has long been recognized.

Typical populations of daphnia consist almost exclusively of females. Under favorable conditions this situation is perpetuated by parthenogenetic reproduction. Eggs produced in this manner are referred to as parthenogenetic or summer eggs. When stressed by falling temperatures, drought, overpopulation, or starvation, populations shift to sexual.reproduction. Parthenogenetic eggs are produced which develop into males. Other eggs known as ephippial or winter eggs are also produced, which after …

An Investigation Of Nitrogen Utilization As A Factor In The Size Selective Feeding Habits Of Lepomis Macrochirus, Stephen M. Hinckley

Masters Theses

No abstract provided.

Chromosome Behavior And Cytokinesis Of Nezara Sp. And Lygaeus Sp., Mohamed Barka Marwan

Masters Theses

No abstract provided.

The Distribution And Abundance Of Tubificids In The Little Calumet River, Gladys Moreno

Masters Theses

No abstract provided.

A Survey Of Nine Common Laboratory Compounds As Causative Agents Of Ciliostasis In Tracheal Explants From Mice, Josie Marshall Fletcher

Masters Theses

No abstract provided.

The Effects Of Body Size, Hair And Brown Adipose Tissue Upon Fever In The Rabbit, Reginald L. Dean

Masters Theses

No abstract provided.

Vegetational Communities On An Abandoned Farm In Van Buren County, Michigan, Larry G. Visser

Masters Theses

Introduction

Several studies have been made of xeric forests in southern Michigan which have developed through secondary succession following the cutting of the presettlement vegetation. Brewer et al. (1973) described such an area in Allegan County, Michigan which was dominated by presettlement pine and is now dominated by oak. The oak forests of the Harvey Ott Preserve in Calhoun County, Michigan have been described by Catana (1967). Studies of the oak forests in the Haven Hill area in southeastern Michigan have been made by Thompson (1953). In addition to these studies of xeric forests in southern Michigan, extensive studies of …

Effects Of Anticonvulsant Drugs On The Morphological And Neurophysiological Aspects Of An Experimental Model Of Epilepsy, Linda D. Compton

Masters Theses

No abstract provided.

A Histological And Immunological Study Of The Forty-Eight Hour Normal Lymphocyte Transfer Reaction, Charles W. Ford

Masters Theses

No abstract provided.

Gap Formation: A Reproductive Isolating Mechanism For Parus Atricapillus And P. Carolinensis In Northern Indiana, Peter Gorham Merritt

Masters Theses

No abstract provided.

The Effects Of Gonadal Hormone Manipulations On Aggressive Target-Biting In Mice, George C. Wagner

Masters Theses

No abstract provided.

Behavioral Aspects Of Southwest Michigan Opilionids, Wolfgang C. Schroeter

Masters Theses

Introduction

Opilionids (Arachnida: Opiliones) are arachnids that have such descriptive common names as harvestmen or daddy longlegs. In the summer and early autumn opilionids become a conspicuous component of the invertebrate fauna; however, as common as these animals are, little attention has been paid to their behavior. Most published research on opilionids deals with their taxonomy.

The intraspecific interactions of opilionids is a significant area or ethology that needs careful examination. Intraspecific interactions fall into three categories reproductive, aggressive, and cooperative behaviors. A knowledge of the reproductive behavior of opilionids is essential for a complete picture or the evolution of …

A Bioassay Study Of Portage Creek Using Tetrahymena Pyriformis As An Indicator Organism, George T. Mimidis

Masters Theses

No abstract provided.

Home Range And Movements Of Fox Squirrels (Scirius Niger) In East Central Illinois, Sheryl L. Dyer

Masters Theses

No abstract provided.

Ecology Of A Mixed Gray And Fox Squirrel Population, Thomas R. St. Peter

Masters Theses

No abstract provided.

Ecology Of East-Central Illinois Hill Prairies, John Thomas Reeves

Masters Theses

No abstract provided.

The Study Of The Pathology Of The Middle One Third Of The Small Intestine Of The Spontaneously Diabetic Chinese Hamster, Patrick Murray

Masters Theses

No abstract provided.

Effects Of Hypobaric Hypoxia On Serotonin In Mouse Brain, Jacob Dale Peuler

Masters Theses

No abstract provided.