Digital Commons Network^™

Nocturnal Flights Of Triatoma Protracta (Uhler) As Indicated By Collections At Black Light Traps : (Hemiptera: Reduviidae: Triatominae), Robert D. Sjogren

Loma Linda University Electronic Theses, Dissertations & Projects

An investigation into the environmental and ethological factors relating to summer flights of Triatoma protracta protracta (Uhler) was performed utilizing black light traps of original design. Field observations were conducted on 51 evenings during the period June 1 to October 31, 1964. The traps were operated on a surveillance basis for the remainder of a twelve month period.

A total of 398 adult Triatoma protracta were collected in traps around a residence located in the chaparral covered foothills 10 miles east of Redlands, California. In addition to observations on field behavior, laboratory dissections were performed on each bug to obtain …

The Piezoelectric Effect Of Bone In Vitro, Lloyd E. Gauntt

Loma Linda University Electronic Theses, Dissertations & Projects

The mechanism of bone deposition and resorption, under stress, is incompletely understood. The direct piezoelectric properties of bone have been suggested as playing an active role in the internal morphology of bone tissue.

This study was designed to fabricate an apparatus and develop a technique to measure, quantitatively, the direct piezoelectric effect of the crystallites of bone.

In vitro studies were done with bone samples taken from bovine femur. The samples were subjected to stress loading and were observed to exhibit a pressure-induced electrical phenomenon. The amplitude of the potentials generated was dependent upon the magnitude of the bony deformation. …

Evaluation Of A Process Of Expanding The Palpi Of Male Spiders For Taxonomic Purposes, William A. Shear

Biology ETDs

Characteristics of the complicated palpal organs of male spiders are widely used in taxonomy. In species with a simple and unspecialized palpus, a gross observation is unusually satisfactory, but in species in which the palpal organ is complicated and specialized, many spider taxonomists expand the palpus in order to observe the structural details. Because the process of expansion has never been critically examined, there is little uniformity in figures and descriptions of new species. In many publications on spider taxonomy figures are of expanded palpi; in other publications, figure are of unexpanded palpi. The present study is based on 29 …

Some Aspects Of The Natural History Of The Rock Squirrel, Citellus Variegatus, William Stalheim

Biology ETDs

A field study was conducted during the summer and early fall months of 1964 to collect information on aspects of the natural history of the rock squirrel, Citellus variegatus grammurus. The study was done in Embudo Canyon at the foot of the west slope of the Sandia Mountains (6500 feet elevation) east of Albuquerque, New Mexico. Twenty nine squirrels were live trapped from a study area 350 yards long by 120 yards wide. These squirrels were painted for visual identification, toe clipped for permanent identification, and released at the point of capture. Field observations yielded information on social behavior, food …

It's A Mollusk, Dorothea S. Franzen

Honorees for Teaching Excellence

No abstract provided.

A Systematic Study Of The Genus Castilleja In New Mexico, Mary Carol Olsen

Biology ETDs

A critical field and herbarium study in Castilleja provides sufficient evidence for recognizing 20 species, 19 perennials and one annual of this genus in New Mexico. Castilleja species are found in a variety of habitats throughout New Mexico and flower from early April to late October. The yellow-bracted taxa are limited to the high mountains of the northern part of the state; others are more generally distributed. One taxon apparently is endemic to the White and Sacramento Mountains. One variety, described from the Charleston Mountains of Nevada, is now reported from the Chuska Mountains of New Mexico also. The scarlet-bracted …

Cesium And Sodium Metabolism By The New Mexico Whiptail Lizard, Margaret Flory

Biology ETDs

The effect of temperature on electrolyte metabolism in the lizard Cnemidophorus perplexus was studied. The biological half-time and tissue distribution were the aspects of cesium and sodium metabolism noted. Increased temperature results in a higher metabolic rate. Measurements were made of the extent oxygen consumption increased with raised temperature in C. perplexus. Radioisotopes sodium-22 and cesium-137 were injected intraperitoneally into lizards kept at several environmental temperatures. Whole body radioactivity counts were taken twice daily on the live animals to determine the retention curves. At 50% retention and 80% retention lizards were sacrificed and tissue radioactivity counts taken to determine electrolyte …

The Effects Of Ambient Pressure On The Biological Response Of Mice To Air Blast., Edward G. Damon

Biology ETDs

The extensive use of high-energy fuels and the development of a wide variety of high explosives have led to increased accidental and wartime exposure of men to detonations. furthermore, with the advent of the development of nuclear weapons, the need for a better under­standing of the biological effects of blast has been greatly increased.

Front Matter, Vol. 7 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

A Comparative Population Study Of Small Vertebrates In The Uranium Areas Of The Upper Colorado River Basin Of Utah, Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

This paper constitutes a terminal report to the United States Atomic Energy Commission for contract AT(11-1)819. It provides not only a faunistic and floristic study of areas having a high and low surface radiation, but also includes a consideration of their general ecology. Major emphasis is placed on the variation of the external characteristics of the small vertebrates of these areas with a statistical analysis of those characters examined in the lizards. The study was conducted in southeastern Utah (Tanner 1963, see map) from October 1959 through 1964, and was conducted as a test of the variation effects of natural …

End Matter, Vol. 7 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

The Importance Of Farm Management In The Under-Developed Economics, Hardev Singh Dhaliwal

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Throughout the history of mankind there always have been famines, disease, and poverty in some parts of the world, and this has been because of economic under - development to a great extent. For nearly a century after the publication of Adam Smith's "Wealth of Nations" in 1776, economic development was the main interest of economists . In the late nineteenth century, Europe, America, and Australia were developing rapidly and few people were interested in raising the incomes of Africans, Arabs, and Asians . Most of the countries in Africa and Asia were under European colonial rule, and being so, …

Kentucky Warbler (Vol. 41, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Amphibians And Reptiles Of Vigo County, Indiana, David Rubin

All-Inclusive List of Electronic Theses and Dissertations

Vigo County, Indiana is an extremely interesting area for herpetological studyo Its geographical location allows for the interplay of faunal elements from east, west, north, and south (Smith and minton, 1957) and its physiography permits investigation of the relations of terrain and glacial geology to herpetofaunal distribution. Blatchley (1891, 1899) published two papers on the amphibians and reptiles of the county and Allyn and Shockley (1938) reported on the county's salamandersa The present paper has the following objectives: to determine which species occur or have recently occurred in Vigo County; to determine amphibian and reptile distribution in the county; to …

Tularemia And Deer Flies In The Environs Of Utah Lake, Utah, Kaye B. Cox

Theses and Dissertations

Deer flies have been implicated as mechanical veotors of tularemia in Utah. Although infected flies heretofore have not been tound in nature, there is little doubt of their importance in transmitting tularemia to man. Two species present in this area, Chrysops discalis Williston and Chrysops noctifer Osten Sacken, have been shown experimentally to transmit the disease. The presence of deer flies in the environs of Utah Lake where tularemia is endemic oftera a potential health threat to man, and the expanding human population and development ot recreational facilities adjacent to the lake inorease this potential. Despite the taot that deer …

Cytogenetic Evidence For The Specific Distinction Of An Alaskan Marmot, Marmota Broweri Hall And Gilmore (Mammalia: Sciuridae), Robert L. Rausch, Virginia R. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Cytogenetic studies based upon somatic cells (bone marrow) have disclosed that the marmot hitherto designated Marmota caligata broweri Hall and Gilmore, occurring in the Brooks Range of Arctic Alaska, differs from M. c. caligata (Eschscholtz) in number of chromosomes (2n=36 as compared with 2n=42 in M. caligata) and in proportions of chromosomal types. Typical karyograms for the two species are presented. It is concluded that the Brooks Range marmot is specifically distinct from M. caligata, the applicable name being Marmota broweri Hall and Gilmore. Also determined were diploid chromosome numbers for two other Nearctic species of marmots, M. …

Some Movements Of Black-Tailed Jackrabbits In Northern Utah, Donald H. Rusch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This work describes the extent and pattern of some black-tailed jackrabbit (Lepus californicus) movements and areas of activity in northern Utah and their relationship to sex and age, and season of the year.

Black-tailed jackrabbits are the most common lagomorphs in much of the western United States, particularly in that vegetational association described by McDougal (1908) as the sagebrush desert. Furthermore, Adams and Adams (1959) have suggested a correlation between sagebrush (Artemisia tridentata) incidence and jackrabbit density.

Farmers often regard this species as a liability because of its depredations on alfalfa (Medicago sativa), crested …

A Survey Of The State Of Utah For Areas Infested With The Stem Nematode Of Alfalfa, Dwayne R. Buxton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant nematodes belong to a large group of invertebrates known as round worms, They derive their name from the Greek word "nema," meaning thread. In literature some authors refer to nematodes as nemas. In England and many parts of the United States, plant-parasitic nematodes are called eelworms.

While some damage to plants results from mechanical injury, salivary secretions injected by the nematode into the plant are usually the major cause of damage. Experiments conducted in the first part of the present century have demonstrated large differences in plant growth in soil infested with nematodes and soil freed of nematodes by …

Operation And Management Guides For A Dairy Manufacturing Plant, Mohammad Valanejad

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The dairy and food industries have become highly technical and almost completely mechanized. They also ranked as one of the greatest industries in the country at the present time and represent an investment of many billions of dollars.

The rigid health department regulations, together with the special processes required, call for many types of specialized equipments and procedures. Most of the processes require heat, power, and refrigeration. More exact control of processes, as well as more efficient operation, have become increasingly important as these industries have matured and as competition has become keener. Material handling and automation are major developments …

A Study Of 5-Fluorouracil: Its Effects And Mode Of Action In Drosophila Melanogaster, John B. Jenkins Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations involving the fluorinated pyrimidine, 5-fluorouracil, and its effects on viruses, bacteria, plants and mammals, have brought to light the following facts: FU inhibits the growth of bacteria, plants and mammalian cells and it decreases the ability of certain viruses to produce progeny. In other words, FU is an antimetabolite that inhibits growth and/or reproduction. Two mechanisms have emerged from these studies to define the mode of action of FU. The first mechanism involves the incorporation of the compound into the RNA of the organism thus altering the base sequence and creating a non functional or damaging nucleic acid. The …

Effect Of Fluoride On Respiratory Enzymes In Soybean Leaves, Arthur Chiu-Eng Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There are many reports relating the effects of fluorides on plant respiration. Fluoride has been regarded as an inhibitor of respiration. Warburg et al. (1942) demonstrated that fluoride inhibited enolase activity, therefore, decreased the respiration rate of yeast. Miller (1958), found a similar inhibition of enolase from pea seed. Bonner (1948), Bonner and Wildman (1946), and Laties (1949) reported that the fluoride ion in culture solutions reduced the respiration rate in Avena Coleoptile, spinach leaves and barley roots. Since the inhibition was reversed by the addition of pyruvate, they concluded that the inhibition of respiration was due to the inactivation …

A Longitudinal Study: The Relationship Of Various Physical Characteristics To Serum Cholesterol In Preadolescents And Adolescents, Carol Ann Milligan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although many theories have been formulated concerning atherosclerosis and its relationship to the incidence of coronary heart disease, few actual facts are known. It is known that atherosclerosis is very complex and appears to be influenced by many factors. It is postulated that an elevated serum cholesterol level is one predisposing factor.

Serum cholesterol levels are likewise influenced by many factors. Age, sex, body build, exercise, socio-economic levels, smoking, health status, weight loss or gain, dietary fat, endocrine function, and stress have been shown to be related to serum cholesterol levels, and according to some authors also are related to …

A Revision Of The Bee Genus Epeolus Latreille Of Western America North Of Mexico, Richard L. Brumley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Members of the genus Epeolus are small to medium-sized wasp-like bees which parasitize the colletid genus Colletes. Twenty-two species and two subgenera are recognized in this work.

Saponin Content Of Lahontan And Du Puits Alfalfas, George Allan Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Primitive peoples have used saponins for many years to kill fish and as a detergent.

Seasonal Habits And Habitat Of The Ruffed Grouse In The Wellsville Mountains, Utah, Robert L. Phillips

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ruffed grouse (Bonasa umbellus incana) inhabits much of the deciduous woodland of northern and central Utah. Its distribution is confined mainly to the Wasatch and Uinta mountain ranges. It has been observed in willows (Salix spp.) at 5, 000 feet elevation and in Douglas-fir (Pseudotsuga menziesii) at 9,000 feet.

The Effect Of Fluoride On C14O2-Fixation And The Synthesis Of Organic Acids, Amino Acids, Protein And Carbohydrates, Chin-Fung Li

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many studies have been conducted on the effect of fluoride on plants, but the exact mechanisms by which fluoride causes damage is little understood. The following physiological and metabolic processes are known to be affected by fluoride: a decrease in chlorophyll (McNulty and Newman, 1961), a diminished rate of photosynthesis (Thomas and Hendricks, 1956; Bishop, et al., 1958), decreased plant growth (Bonner and Thimann, 1950), inhibition of ascorbic acid synthesis (Smith, 1952), variation in starch and total polysaccharides (Donald and Emerson, 1961), inhibition of glucose transport (Jiri, et al., 1962), inhibition of metabolism (Ordin and Skoe, 1963), effects …

Host-Parasite Relationships Between Prunus Mahaleb And The Parasitic Nematodes Pratylenchus Neglectus And Meloidogyne Hapla, Bernard Al Tait

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah orchardists have encountered problems which they have needed to control for continued successful and economical fruit production. Some of these problems are diseases such as western-X virus, cytospora canker (Wadley, 1955) and codling moth (Davis, 1957). These diseases, because of their nature and severity, have received more attention than others.

Radiosensitivity And Cytogenetic Studies On An Interspecific Grass Hybrid, Paul James Bottino

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The complex response of plants to ionizing radiation has never been clearly understood. One of the main problems is the differential sensitivity of plants to radiation. A clear understanding of differential sensitivity lies far in the future. For the present a major question is: can we predict the radiosensitivity of a plant before radiation exposure? Some progress has been made in answering this question. Sparrow et al. (29) feel that they have a useful statistic which can be used to predict the approximate radiosensitivity of a plant. Average interphase chromosome volume has been tested on sixteen species of herbaceous plants …

A Revision Of The Eriogonum Deflexum Torr. Complex, James L. Reveal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study includes those annual species of Eriogonum which have glabrous cordate or obtusely based calyx-segments, and 5-lobed involucres which are deflexed or erect on rather stout peduncles. With the possible exception of a few peripheral taxa, these species are believed to constitute a natural assemblage.

Chlorophyll, Cartenoid And Protein Metabolism In Relation To Iron Chlorosis, Antaraguttu Subbayya Shetty

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Iron as an essential element has been known since 1843, when Gris proved its need for the growth and well being of plants. Since then, many investigations have been carried out on various aspects of iron nutrition, leading to the accumulation of a vast literature, a monument to the assiduity of the chemists and the biologists.