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A New Hypothesis Conerning The Sequence And Nature Of Meiotic Events In The Female Of Drosophila Melanogaster, Rhonda F. Grell

Doctoral Dissertations

Three of the basic phenomena comprising the meiotic process are synapsis, crossingover, and disjunction. It is generally conceded that some form of pairing must precede crossingover; that the crossingover process occurs prior to disjunction; and that disjunction implies a previous association of elements. Construction of a model describing the causal relations among the three events might be expected to be fairly simple, since the possibilities are limited. Yet, no model has been proposed that is consistent with all the genetic data.

Field Experiences With The Division Of Nutrition In The Wisconsin State Board Of Health, Joan Elizabeth Dow

Masters Theses

This report is based upon observations and experiences during a seven weeks' period of field training with the Division of Nutrition in the Wisconsin State Board of Health in Madison, Wisconsin.

The purpose of the field training was to supplement the on-campus academic education in Public Health Nutrition with practical nutrition experiences and observation. More specifically, the purpose was to help the student-nutritionist gain an understanding of the function of a state nutrition staff that works through a decentralized, district organization.

A varied program was planned by the Director of the Division of Nutrition to help the student accomplish these …

Management And Performance Of Swine At Ames Plantation, Everett E. Carrell

Masters Theses

The purpose of this study was to observe management practices and evaluate performance of straightbred and crossbread swine in the swine research program of the Animal Husbandry-Veterinary Science Department at Ames Plantation, Grand Junction, Tennessee. Data from straightbred Duroc, Hampshire, and Landrace and crossbred H X D and H X P X L pigs farrowed in the fall of 1956 and sold in the spring of 1957 at Ames Plantation were used in this study.

The author observed and assisted in all phases of management and production throughout one season. The management practices used are practical and could be adopted …

Management And Performance Of Beef Cattle At Ames Plantation, Everett E. Carrell

Masters Theses

The purpose of this study was to observe and participate in management practices, to become familiar with performance testing, and to evaluate bull groups used for one calf crop in the beef cattle research program of the Animal Husbandry Department at Ames Plantation, Grand Junction, Tennessee. Data from the 1958 spring calf crop were used. A feeding test in progress was also included in this study.

The author observed and assisted in all phases of management throughout one calving season. There was considerable variation in performance of the nine bulls used in this study. Indexes on the progeny of the …

Interrelationships Between Sulfate Metabolism And Tocopherols In The Weanling Rat, Young Ping Chin

Masters Theses

There have been numerous investigations in which reported observations point toward the existence of metabolic interrelationships between tocopherols, the sulfur-containing amino acids, and inorganic sulfur. In previous work, this laboratory has used mixtures partially composed of oxidized casein and casein to produce a protein source having a low methionine content and lending variation with respect to inorganic sulfate. Alpha protein, a purified soybean protein, is characteristically similar to oxidized casein in that both substances have a low sulfur amino acid content. Due to the expenses involved in the laboratory use of oxidized casein, the present investigation was undertaken to determine …

Capital Requirements On A Grade A Dairy Farm, Everett E. Carrell

Masters Theses

The purpose of this study was to determine if it was possible to secure a satisfactory return on capital invested in converting a cotton farm to a modern dairy, cotton, and hog system of farming. One of the eight farm management units located on the Ames Plantation in West Tennessee which was supervised by the University of Tennessee in cooperation with the Hobart Ames Foundation was used in the study. The unit was one formerly rented to a tenant for a standing rent of two bales of cotton. A new farming system was developed providing for a 50-50 sharing of …

Taxonomy And Ecology Of Fresh-Water Ostracods Of South-Central Texas, Charles Davidson Wise

Biology ETDs

The Ostracoda (Gk. ostrakon, a shell, and eidos, form) are extremely interesting crustaceans that differ from most crustaceans in possessing strongly calcified, bivalve carapaces, Ostracods occur in great abundance in all types of waters, both marine and non-marine. With the exception of very transient waters, probably as many as 90% or more of the bodies of fresh water in North America contain ostracods. Because the carapaces are easily fossilized, ostracods are abundant in deposits ranging from the Ordovician to the present.

Some Environmental Features Of Hallett Station, Antarctica, With Special Reference To Soil Arthropods, Madison E. Pryor

Doctoral Dissertations

Introduction: Since Cook's voyage of 1772-1775, numerous expeditions, nationally and independently supported, have explored coastal and inland areas of Antarctica. The primary purpose of most early scientific expeditions was directed toward a study of the physical nature of the continent. In most instances, biologists were not included as expedition personnel and a large portion of the information concerning the flora and fauna of the continent has been contributed by investigators trained in a variety of scientific disciplines. A very few systematic investigations of land flora and soil fauna have been made. In spite of the obvious inadequacy of such investigations, …

Studies On The Morphology And Growh Rate Of The Cestode Hymenolepis Microstoma After Gamma Irradiation Of The Cysticercoids And Eggs, Huldrich H. Kuhlman

Doctoral Dissertations

From the literature on effects of radiation on mammals, insects, and other organisms, it appears that radiation produces abnormalities chiefly by destroying or inhibiting growing cells and tissues. The effects on length of the worms may be due to reduction in cell population responsible for growth. The presence of certain morphological abnormalities which have been observed, particularly those which have been characterized by the absence of one or more reproductive organs, might also be attributed to a change in the growth or embryological apparatus and that radiation only serves to increase the frequency of these disturbances.

For further similar studies …

Meiosis, Mitosis, And The Induction Of Chromosomal Abnormalities In Hymenolepis Diminuta By Gamma Rays, Raymond Louis Kisner

Doctoral Dissertations

Summary

A growth rate study for H. diminuta in ten worm infestations was attempted. The desired number of worms was not recovered from enough rats to determine a reliable growth curve. It was discovered that worm length varied within rats and between rats of comparable sex, age, weight, worm burden, and genetic background.

Shellfish Resources Of Washington, Robert Grant Levens

Graduate Student Research Papers

This paper will explore the salt water shellfish resources of Washington State. Particular emphasis will be placed upon the Pacific and Olympia Oysters, the Dungeness Crab, the research being done at Quilcene, and the lesser varieties of shellfish, including shrimp and the hardshell species of clams. The latter includes the littleneck, butter, Manila, and geoduc clams. A major emphasis will be the commercial importance of the shellfish, but the sportsman and the expanding role of Washington as a summer recreation area will not be overlooked.

An Ecological Study Of An Exclosure In The Mountain Brush Vegetation Of The Wasatch Mountains, Utah, Elray S. Nixon

Theses and Dissertations

This is a comparative study of the vegetation and soils of an exclosure in the mountain brush vegetation of the Wasatch Mountains, Utah. The exclosure was fenced and initially analyzed during the summers of 1949-1950. The study area is located in Pole Canyon in the Uinta National Forest, a few miles northeast of Provo, Utah. The dominant woody species of the vegetation in the exclosure are big toothed maple (Acer grandidentatum) and Gambel oak (Quercus gambelii). After settlement of the area in and around Provo, Pole Canyon became overgrazed by livestock. Since 1949 the area has been protected from grazing. …

An Analysis Of A Hybrid Complex Involving Agropyron Subsecundum, Agropyron Trachycaulum And Elymus Glaucus, Lewis Kay Shumway

Theses and Dissertations

In the past twenty years many workers have made contributions to a better understanding of hybridization and introgression through studies of members of the grass family. The present study is an attempt to increase the understanding of the importance and amount of hybridization and introgression in members of the Tribe Hordeae. This study is concerned with a hybrid complex involving Agropyron subsecundum (Link) Hitchc. (bearded wheatgrass), Agropyron trachycaulum (Link) Malte (slender wheatgrass) and Elymus glaucus Buckl. (blue wild rye).

Observations And Experiences With The Nutritionist In The Public Health Service Indian Hospital, Pine Ridge, South Dakota, Soekati Tjokrowirono

Masters Theses

(From the Introduction)

The two weeks of observation in the United States Public Health Service Indian Hospital in Pine Ridge as part of the student's year of graduate study in nutrition was planned for several reasons. The purpose of this observation was to gain knowledge of the organization and functioning of a local unit of a national health agency in the United States and to learn about public health work in the Indian Reservation of South Dakota, and about the nutrition section particularly.

A Report Of Field Training With The Nutrition Unit Of The Minnesota Department Of Health, Martha Russell Rider

Masters Theses

Seven weeks were spent in Public Health Nutrition field training with the Minnesota Department of Health under the direction of the Supervisor of the Nutrition Unit.

The field training was planned for the purpose of helping the student obtain a practical understanding of the functions of an official health agency, and particularly of the role of the public health nutritionist within the agency.

Six weeks of the field training included orientation in selected divisions of the Minnesota Department of Health. It also included observation of the nutrition program within the department and with other official and voluntary agencies and professional …

Thiamine Retention In Pork After Home Canning, Sermsii Gongsakdi

Masters Theses

Pork has long been recognized as contributing important quantities of thiamine in human nutrition. It has been shown to be a richer source of this food factor than beef or poultry meat.

Pork serves as a principal source of animal protein in Thai food according to Chandrapanond (1959). Besides contributing high quality protein, lean pork muscle is said to be the chief source of thiamine in Thailand.

In order to have pork available all year round, it is the aim of the Thai government to introduce methods of home food preservation to their people. Canning is a method of preservation …

The Interrelationship Of Tocopherols And Sulfur Metabolism, Betty June Pendergrass

Masters Theses

The metabolic effects of the tocopherols and or sulfur have been inadvertently linked through research findings. Although not initially postulated, a relationship between vitamin B and sulfur has turned up in such phenomena as prevention of dietary hepatic necrosis, muscular dystrophy, erythrocyte hemolysis; and structural alteration of mucopolysaccharides, proteins, and lipoproteins. The relationship between vitamin E and sulfur remains ill-defined at present; the available information has been obtained as a by-product of research efforts oriented toward other goals. However, an increasing body of evidence indicates that significant behavioral interactions may occur. The present investigation was designed to evaluate possible interrelationships …

Effect Of Feeding Various Hay-Concentrate Rations On The Production And Composition Of Milk, K. C. Mathew

Masters Theses

Introduction: The composition of cow's milk and the variations to which it is subjected are questions of great importance. This is true both from the standpoint of physiology and from the standpoint of human nutrition. For these reasons the composition of milk has been subjected to careful investigation for a long time.

Factors Affecting The Performance Of Broilers, G. R. Nair

Masters Theses

The efficiency of broiler production has increased greatly in recent years and can be attributed to advancements in the areas of breeding, management, nutrition, and disease control. No single factor in any one of these areas can be said to account for the major share of this increased efficiency but rather it is the combination of a large number of factors such as breeding techniques, and breed improvement, of improved management practices, and of advances in nutrition and disease control.

The optimum combination of conditions or factors for broiler production is seldom, if ever, realized. Information which might have been …

The Hemodynamic Changes In Anesthetized Dogs Subjected To Hypoxia And Cold, Virden A. Dohner

Biology ETDs

The combined effects of hypoxia and cold no doubt were known by the ancients in the areas of the world where there are mountains of considerable height. But the ancients feared the mountains (6) and therefore have left no precise information which might incline one to believe they noted symptoms of physiological significance.

Determinants Of Occurrence And Distribution Of Fungi In Marine Environments, Paul W. Kirk

Master's Theses

Studies ware made of the effects of temperature and nutrient levels on salinity optima for growth and sporulation of Chaotomium Globosum and two marine Pyranomycetes, Torpedospora radiata, and Halosphaeriopais sp. Methods of culture and evaluation of sporulation were also investigated.

Discussion focused on ecological implications of data, in particular, on the probable survival value to a marine-fit fungus or a Phoma pattern mechanism-envolving vegetative and reproductive phases. As the seasons progress, the region where concentrations and proportions or salts are most favorable remains similar to that where vitamin requirements are least and biotic factors are most favorable.

A Morphological Study Of Some Larval Ticks Of The Genus Dermacentor With Emphasis On Structures Of Possible Taxonomic Importance, Richard Grant Robertson

Theses and Dissertations

This study was undertaken to evaluate and determine morphological characteristics which might prove valuable in the identification of the larvae of the following species of ticks of the genus Dermacentor Koch: D. albipictus Packard, D. andersoni Stiles, D. hunteri Bishop, D. parumapertus Neuman, and D. variabilis Say. A taxonomic key for the identification of all of the Canadian and United States species of the larvae of the genus Dermacentor Koch cannot be constructed until specimens of D. halli and D. occidentalis have been examined. However, the followng conclusions were reached regarding the species studied: 1. Position of setae is of …

Introducing Aquatic Ecology To Ninth Graders, Inez P. Sutton

Masters Theses

Chapter I

Introduction

In discussing the basis for teaching high school biology, Van Deventer¹ states, "...the present typical course in high school biology serves adequately neither the terminal student nor the college entrance student." He holds that today's courses present watered-down versions of college courses to the student before the intelligence of the student has matured enough to grasp such subject matter. As a result there is very little carry-over value from such courses, and the students may even develop a dislike for biology. This study constitutes an effort to understand these problems and to devise ways of solving …

Evaluation Of Hydroxyprogesterone Acetate In The Prevention Of Canine Estrus, Kenneth B. Haas

Masters Theses

Foreword

Thirty years ago, endocrinology was a laboratory curiosity appreciated by few veterinarians. In those rare instances when the new science escaped from the laboratory and reached the clinic, the endocrine preparations used were extremely crude and often ineffective. In the growth of endocrinology as a science, availability of pure crystalline hormones has played an essential role, and to chemical synthesis must be credited the preparations which make specific endocrine therapy possible today.

In the last two decades endocrinology has come into its own in veterinary medicine, especially in regard to sex endocrinology. But only in the last ten years …

Some Experiments On The Utilization Of Rice Straw In Papermaking, Kirit C. Mody

Paper Engineering Senior Theses

I. A Brief Description of Rice Straw

The botanical name for rice straw is Oryza sativa. Rice is a well-known cereal and is the staple food of hundreds of millions of people. According to R. J. Rochevica, cultivated rice, including all numerous varieties, originated from will species, which are indigenous to Africa, India, and Indo-China (6).

Blood Oxygen Capacity Of Birds, J. R. Powell

Master's Theses

Avian blood oxygen capacity (BOC: Vol. %) was measured by a modified Roughton - Scholander syringe method with regard to parameters of body weight and sex. Two samples, collected from the Richmond vicinity, were investigated: the domestic pigeon (Columba livia Gmelin) and 25 other bird species.

"A Study Of A Method To Predict Printing Quality Of Paper By Means Of Smoothness And Elongation Test Results", William R. Castle

Paper Engineering Senior Theses

The object of this thesis is to investigate the use of smoothness and elongation test results as criterion for evaluating the printing quality of paper. The relationship of smoothness and printing quality has been known for many years and in all previous work it has been shown to be influential to printing quality. The relationship of elongation and printing quality has never been investigated. The experimental procedure consisted of testing the paper samples for smoothness and elongation, and determining the printing quality of the different papers with the I. G. T. Printability Tester. The results of the analysis of the …

The Utilization Of Hydrogenated Tall Oil In Paper Furnishes, Thomas W. Asmus

Paper Engineering Senior Theses

A literature survey is presented concerning the properties of tall oil, the theory of catalysis, and catalytic hydrogenation applied to tall oil. It is the purpose of the experimental work to prepare a material from tall oil by hydrogenation which will lend itself more useful as a sizing agent for certain low grades of paper.

The experimental results indicated that by hydrogenating tall oil soap, a whiter, less oily material is obtainable. Handsheets were prepared using this hydrogenated material, the starting material, and rosin size as sizing agents. It was found that the handsheets sized with the hydrogenated material had …

Deinking Of Coated Magazine Papers: Experiments With Some Enzymes, Edgar E. Moore Jr.

Paper Engineering Senior Theses

Introduction

At the present time fairly harsh procedures are used to deink magazine waste paper. The paper must be cooked in the presence of strong chemicals such as sodium hydroxide at elevated temperature and in some cases this is even carried out under pressure. This results in the removal of ink but the fibers are considerably darkened due to this procedure (1,2). It was the object of this survey to explore the literature to see if there is any information on a relatively mild method involving enzymes, which due to the absence of harsh chemicals and high temperatures would possibly …

Pigment Coating Of Paper In The Laboratory A Comparison Of Several Methods, Clare L. Longton

Paper Engineering Senior Theses

Four Bench-type laboratory coaters were compared as to their pattern formation which influences the printability of the coated sheet.

The four Bench-type laboratory coaters used were Wire Wound Doctor Rods, Bird Film Applicators, Bench Trailing Blade Coater and the Martinson Coater.

A constant solids content coating color was used which consisted of 100 parts coating clay and 18 parts casein. A record of the viscosity of the coating slip was kept.

The coated sheets were evaluated by visual inspection, and photomicrographs were taken of the most characteristic patterns. Coat weight, reproducibility and smoothness values were also determined.

It was found …