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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.

International Symposium: The Etiology Of Myocardial Infarction

Henry Ford Hospital Medical Journal

No abstract provided.

Front Matter

Henry Ford Hospital Medical Journal

No abstract provided.

A Report Of Some Examples Of Abnormal Halo Volume, Harold M. Frost, D. M. Bosworth, R. H. Halliburton, Ziya Sezgin

Henry Ford Hospital Medical Journal

No abstract provided.

The Advantages Of Vestopal W. As An Embedding Material For Biological And Medical Electron Microscopy, Robert R. Cardell Jr.

Henry Ford Hospital Medical Journal

No abstract provided.

The Living Network In Prairie Soils, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

This study treats of our midcontinental soils and of the wonderful network of roots within them of a vegetation which has clothed them for untold centuries. This vegetation has almost vanished so great has been the toll of the tractor-drawn plow, over- grazing and trampling, injudicious use of poisonous sprays, building of highways, and other causes. Virgin prairie and undisturbed soil occur in quantity only in areas where limestone underlies a shallow soil and prevents plowing or in sand so unstable that destroying the vegetation with its binding roots is almost synonymous with losing the soil. The many thousands of …

Kentucky Warbler (Vol. 37, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Investigation In The Physiology Of The Spore Formation Of Pseudoples Trifolii (Rostr.) And Petr., Emory S. Crosby

Masters Theses & Specialist Projects

Plant pathologists have worked to some extent for many years in an attempt to describe the complete physiology of the organism responsible for pepper spot of clover, particularly as found on white clover (Trifolium repens, L.). These works have not been extensive or concentrated and at the present time, no definite conclusions have been reached.

The causal agent of pepper spot of clover is Pseudoples trifolii (Rostr.).

Pseudoples trifolii usually is found parasitizing clover in the early spring and continues throughout the spring until the temperature exceeds thirty degrees centigrade. Elliott established that Pseudoples trifolii will not produce infectious spores …

Volume Tables For Aspen In Colorado, Geraldine Peterson

Aspen Bibliography

No abstract provided.

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. …

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.

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 …

Experimental Multiband Tetracycline Measurement Of Lamellar Osteoblastic Activity, Harold M. Frost, H. Roth, A. R. Villanueva, Stanko Stanisavljevic

Henry Ford Hospital Medical Journal

No abstract provided.

Abstracts Of Recent Publications Of The Professional Staff Of The Henry Ford Hospital And The Edsel B. Ford Institute For Medical Research

Henry Ford Hospital Medical Journal

No abstract provided.

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 Diets Low In Phenylalanine And Tyrosine For Collagen Disease, Eva H. Crites

Loma Linda University Electronic Theses, Dissertations & Projects

In 1957, Nishimura 74 made a startling proposition that linked collagen disease with hereditary metabolic defects. This defect was stated to be in the metabolism of tyrosine. Based on this report, a pilot study was conducted in which six rheumatoid arthritis patients and one scleroderma case were treated with a low phenylalanine and tyrosine diet.

The diets supplied approximately 1500 calories and 36 grams of protein. No more than 1500 mg. combined phenylalanine and tyrosine were given in any one day. Lofenalac was used as the principle source of protein.

During the six week test period laboratory studies were carried …

Effect Of Isocaloric Unsaturated Fats On Serum Cholesterol Of Patients Treated With Hypocholesterolemic Agents, Yvonne Marie Hatley

Loma Linda University Electronic Theses, Dissertations & Projects

The effect of a high unsaturated-low saturated fat diet on serum cholesterol levels were studied. Subjects were clinic patients receiving the following hypocholesterolmeic agents: triparanol (MER-29), diildothyroacetic acid (Diac), dextrothyroxine (d-T₄) and 3-methoxy-16, alpha-methyl-1,3,5, (10)-estratriene-16 beta, 17 beta-diol (Manvene or Anvene).

Fifteen hypercholesterolemic patients, eleven of whom were diabetic, were placed on diets with prescribed amounts of unsaturated fat. The caloric distribution was 40 per cent carbohydrate, 20 per cent protein, and 40 per cent fat. The level of unsaturated fat was 70 per cent of the total fat.

Seventy-one per cent of the patients on the hypocholesterolemic …

A Comparative Study Of The Growth Of Polyoma Virus In Two Secondary Cell Lines: Mouse Lymphoma And Normal Mouse Fibroblasts, Rheeta M. Stecker

Loma Linda University Electronic Theses, Dissertations & Projects

In comparing the growth of polyoma virus in secondary cell cultures of a mouse lymphoma (P388D₁, a known polyoma-supporting strain) and normal mouse fibroblasts (Earle’s L cells), the following observations have been made.

The L cell is capable of supporting the growth of the polyoma virus with reproduction and release of infectious particles. Viruses appear in the fluid from time to time over a period of several weeks. This probably represents a carrier state of the virus in L cells. Many of the L cells in infected cultures are not killed by the virus infection.

Virus particles released …

A Review Of Drug Addiction And A Study Of Its Relation To Carbohydrate Metabolism, Eppie Chung Hartsuiker

Loma Linda University Electronic Theses, Dissertations & Projects

The specter of addiction eventually involves everyone of the community. It is a three-fold problem of socio-economic, psychological, and physiological factors. The least understood is the physiological or biochemical aspect of addiction.

It has been postulated that an upset in carbohydrate metabolism may be a biochemical cause of addiction. Several avenues were employed to investigate this possible cause of addiction.

1. A diet survey was conducted and revealed a greater consumption of refined carbohydrates, confections and alcoholic beverages in addicts.

2. Five-hour oral glucose tolerance tests were performed on 7 addicts and 12 non-addicts. These tests revealed that there were decreased glucose …

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Bark Beetles Of The Genus Dryocoetes (Coleoptera: Scolytidae) In North America, Donald Edward Bright Jr.

Theses and Dissertations

The genus Dryocoetes is widely distributed in Europe, Asia, North America and Central America. It consists of about sixty species, seven of which occur in North America.

A Study Of The Mitotic Karyotypes Of Five Species Of Culicine Mosquitoes Found In New Mexico, David A. Laycock

Biology ETDs

Karyotypic studies were made of five species of mosquitoes: Culex tarsalis Coquillett, Culex pipiens quinquefasciatus Say, Culiseta incidens (Thomson), Psorophora signipennis (Coquillett), and Aedes dorsalis (Meigen). Slides of tissue from the limb buds were prepared by the squash technique. All five species were found to have a diploid number of six. The study shows that Aedes dorsalis, Psorophora signipennis, and Culiseta incidens have virtually identical mitotic karyotypes, with two pairs of large and one pair of somewhat smaller chromosomes. Culex tarsalis and Culex pipiens quinguefasciatus have karyotypes that contain three sizes of chromosomes. In Culex tarsalis there are obvious size …

A Comparative Study Of The Antidiuretic Hormone Bio-Assay Using Three Species Of Bufo, Jeanne Marie Jordan

Biology ETDs

This study was designed to (1) determine and compare the sensitivity of three species of Toads of the genus Bufo to the hormone Pitressin, a commercial anti-diuretic hormone, (2) determine and compare the suitability of three species of Bufo as subjects in anti-diuretic hormone bio-assay, and (3) compare the physiological responses of the three species to the injected hormone.

Influence Of Auxins On Growth And Development Of Excised Embryos Of Pinus Ponderosa, Virgil K. Howe

Biology ETDs

The purpose of the experiment was to examine the influences of selected auxins upon seedling development post germinal cultures of excised embryos of Pinus ponderosa Laws (ponderosa pine). Seedlings were studied on an agar medium and later in quartz sand with added nutrients.

Mammals Of Mount Taylor, Valencia County, New Mexico, Eugene E. Schroeder

Biology ETDs

During the summer of 1960, three months were spent in making a comprehensive study of the kinds and ecological distribution of native mammals in and above the Transition Zone on Mount Taylor of Valencia County, New Mexico.

Mount Taylor, and old volcanic pile, rises 11,301 feet above sea level. Three boreal life zones, the Transition, Canadian, and Hudsonian were assigned to Mount Taylor.

Small mammals were collected by two sampling methods, quadrant and line trapping. However, mist nets were used for capturing bats. Quadrants were placed in various plant communities for three successive nights. Numbers and kinds of mammals recorded …

Some Aspects Of The Life History Of The Silky Pocket Mouse In New Mexico, Richard B. Forbes

Biology ETDs

Pocket mice of the subgenus Perognathus, especially those of the little known species Perognathus flavus Baird, present several interesting ecologic and taxonomic problems. A prerequisite of studies of these problems is a knowledge of extent of individual morphological variation attributable to age. A purpose of his paper is to investigate the relationship of age to size, molt and pelage, reproductive activity, and season in the silky pocket mouse. Another purpose is to analyze the summer food habits of P. flavus as revealed by study of several large series of pocket mice collected during August of 1958.

Science: In The Pursuit Of Truth And The Furtherance Of Understanding, Wayne Warde Wantland

Honorees for Teaching Excellence

No abstract provided.

Geographic Variation Of The Hispid Cotton Rat In New Mexico, A.L. Gennaro

Biology ETDs

A total of 520 cotton rats, Sigmodon hispidus, was examined to determine the kind and amount of geographic variation of these animals in New Mexico.

The distributional history of Sigmodon hispidus in New Mexico may be revealed by a relationship between color variation of these animals and soil color of areas from which these animals were taken. This relationship suggests, firstly, that Sigmodon hispidus has occupied the southern Rio Grande Valley for a longer period of time than it has areas east of the Rio Grande Valley, and secondly, that Sigmodon hispidus has only recently occupied the Deming Plain. …

A Pleistocene Molluscan Fauna Near Byers, Clay County, Texas, Don Allen, E. P. Cheatum

Journal of the Graduate Research Center

Fossil fresh-water and land mollusks are described from a Pleistocene alluvial deposit near Byers, in Clay County, Texas-an ancient lake-bed formed by an ox-bow cut-off during the meandering of the Red River. Using as indicators recognized faunas which are identified with known geological ages in the mid-continent region of the United States, a comparative study chart and vertical-range graph were made of the Byers shells to determine age of deposition. This comparative-study method dated the shell deposit back to an Illinoian age. The molluscan fauna indicates during this time a more humid and cooler climate without the summer high temperatures …