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Studies Of Cs137 Metabolism In Several Mammals During Cold Exposure And Hibernation, Yu-Chong Lin

Biology ETDs

Experiments were conducted to define the extent to which lowered body temperature changes biological half-time and distribution of radiosotopes in tissues.

Metabolism of radioisotopes may be expected to be temperature dependent as the metabolism of many electrolytes has been demonstrated to involve temperature dependent mechanisms such as enzymatic transfer.

The effect of temperature on Cs 137 distribution in the mammalian hibernator, Citellus lateralis (Golden mantled ground squirrels) was studied. Experiments were conducted at the whole body and tissue levels. Radioactivity was measured with a small animal gamma scintillation detector. Whole body counts of animals given a single intraperitoneal injection of …

Phytosociological Study Of The Picuris Grant And Ethnobotanical Study Of The Picuris Indians., John C. Krenetsky

Biology ETDs

The objective of this study was to make a vegetative map and phytosociological study of the Picuris Grant, Taos County, New Mexico, and an ethnobotanical study of the Picuris Indians. The ethnobotanical study consists of a lid of commonly used plants and their uses.

The vegetation of the Grant is divided into five types: pinyon-juniper, ponderosa pine-pinyon-juniper, ponderosa pine, mixed conifer, and domestic. The first four types were subjected to intensive sampling using the line-strip method of Woodin and Lindsey modified to 400-foot elbs. Six elbs per slope exposure in each type were attempted.

Due to more favorable temperature and …

Geographic Variation Of The Pocket Gopher Thomomys Bottae In The Rio Grande Valley Of New Mexico, Thomas H. Follingstad

Biology ETDs

The geographic variation of the pocket gopher Thomomys bottae in the Rio Grande Valley of New Mexico and Conejos County, Colorado were studied. The pocket gophers were collected and prepared as standard museum skins and skulls. Various dimensions of the pocket gophers are measured, treated statistically, and plotted as Dice squares. Four groups of geographically related and like-sized animals were noted. These groups could be associated with four previously described subspecies of T. bottae. It was possible to observe a correlation between the mean size of each sample of gophers and the soil type in which they were found. The …

Relation Between Use Of Lincomycin And Outgrowth Of Yeast, Howard W. Clapp

Masters Theses

Introduction

The use of antibiotics has increased the average life expectancy of mankind. They have prevented and cured infectious diseases that previously terminated in death. Consequently, recovery is often prompt and complete.

Though a benefit to mankind, the use of antibiotics in the treatment of infectious disease has also been accompanied by new problems. For example, treatment of a primary infection such as a bacterial pneumonitis with a broad spectrum antibiotic, may result in the death of some of the bacteria. More than one species of bacteria, however, are often found in the infected area. If such be the situation, …

Phytotoxic Substances From Soil Microorganisms And Crop Residues, T.M. Mccalla, F.A. Haskins

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The role of organic matter in the growth of plants has been a subject of much investigation and controversy since the sixteenth century. During the early era, decomposition of plant residues and green and animal manures provided a primary source of minerals for plant growth. In addition, beneficial effects on soil structure and water-holding capacity were attribute to the presence of organic matter. With the development of agricultural chemistry culminating in the work of Liebig in the nineteenth century, it was discovered that plants could make satisfactory growth in the absence of added organic matter if suitable kinds and amounts …

Some Factors Involved In Growth And Sporulation Of Pilobolus Crystallinus Tode And Pilobolus Umbonatus Buller, Kenneth L. Poff

Master's Theses

Pilobolus umbonatus Buller and P. crystallinus Tode grew normally in a nitrogen atmosphere but their sporagnia were non-pigmented. When palced in anaerobic jars along with obligately anaerobic and obligately aerobic bacteria, the fungi grew in the range of oxygen concentrations too low for growth of the aerobic bacterium, but high enough to prevent growth of the anaerobe. The fungi did not grow when the oxygen was depleted to the point that allowed growth of the anaerobic bacterium. Catalase was not produced by the hyphae and trophocysts which normally grow beneath the surface of the medium, but was present in the …

Investigation Of Possible Autotoxicity In Daucus Carota L., Carole Greer Smith

Masters Theses

Section I

Introduction

Results of recent research indicate the probable existence of plant-produced chemical substances which affect the behavior of other plants. Germination-inhibiting, and growth-inhibiting substances have been found to be widely distributed throughout the Plant Kingdom (Garb, 1960). Although the presence of inhibitors has been demonstrated in laboratory experiments, their ecological significance has not been clearly defined.

A preliminary study by the writer indicated the probability of autotoxicity in Daucus carota L., a biennial common to fields and roadsides in the northeastern United States. This study suggested the following investigation which was undertaken to determine more specifically the effects …

Commencement Program 1964, Loma Linda University

Commencement Programs

CONTENTS

3 | The Academic Procession

4 | The Vesper Service

6 | The Sermon

8 | Conferring of Degrees

11 | Candidates for Degrees

21 | Candidates for Certificates

22 | Awards

24 | Class Officers

25 | To Make Man Whole - Merilyn R. Chace & Perry W. Beach

26 | Academic Costume

28 | Waymarks

29 | Summary, 1905-64

The Effect Of Varying Protein Intake On Trichinella Spiralis Infection In Mice, Clare K. Kwan

Loma Linda University Electronic Theses, Dissertations & Projects

Three hundred Swiss Webster albino mice three weeks of age were placed on low (8%), medium (24%), high (48%) protein levels and a commercial laboratory animal feed, Purina Chow for various lengths of time: (1) simultaneously with infection, and four weeks thereafter, (2) three weeks before infection and throughout the four-week infection period, and (3) six weeks prior to infection and during the infection period. The protein source was casein. Sixty of the 300 mice used served as noninfected controls, and the other 240 were each infected with 400 washed, suspended Trichinella spiralis larvae obtained from a rat by the …

Some Aspects Of Kangaroo Rat Locomotion, Gerald G. Wheeler

Biology ETDs

Two species of kangaroo rats, Dipodomys merriami and D. ordi, were compared as to speed of locomotion in an experimental situation. They were timed as they moved through a hardware cloth tunnel with an electrified floor. Measurements of body parts especially those associated with a salutatory mode of locomotion were made, analyzed statistically, and their relation to the results discussed. The morphological data suggest that D. merriami can be expected to move more rapidly. Under laboratory conditions, however, D. ordi was faster (at the 95% confidence level). Possible reasons are discussed.

The Water-Bath As A Tool In Evaluating Responses Of Small Mammals To Thermal Stress, John T. Yelverton

Biology ETDs

The rate of heat loss from an animal to the environment is dependent upon multiple factors. External or environmental factors include the temperature gradient between the animal end the environment, humidity, and air velocity. With a water-bath technique these variables are eliminated by keeping the skin temperature of the animal nearly equal to that of the water.

In this study Citellus lateralis vas the only animal able to endure hypothermic conditions (25 C water) in either swimming or confined states by increasing metabolic rate. It is apparent that Mesocricetus auratus and Dipodomys ordi are more dependent upon passive temperature regulation …

The Effects Of Cobalt-60 On A Desert Root System, Mary G. Mayes

Biology ETDs

Tribulus terrestris L. (T. terrestris) is a late summer annual inhabiting relatively dry areas of southwestern United States. In the more northern latitudes of the Southwest, seeds do not germinate until about the middle of July when both day and night temperatures are high and the seasonal rains have started. The vinelike plant grows prostrate with a prominent deep penetrating taproot and even-numbered, pinnately compound leaves. The leaflets vary from three to seven pairs, are oblong, entire, folding together along the leaf axis at night or in windy or unusually cool weather. The flowers are usually lemon yellow, solitary, and …

Modern Pollen Rain And Fossil Profiles, Sandia Mountains, New Mexico, James Edward King

Biology ETDs

The modern pollen rain from each forest association on the east slope of the Sandia Mountains, new Mexico was sampled by the means of byrophytic pollsters. These modern pollen spectra were then compared to the diagrams of four fossil pollen profiles collected at 10,000, 8,000, 8,100, and 7,300 feet. It was found that the modern pollen rain of Picea and Abies is limited to the association in which these taxa are found and that down-slope, wind-borne drifting of Picea pollen is less than 400 feet. Since the only Picea found in the Sandia Mountains grow in the spruce-fir association, the …

Plant Distribution Of The Sandia Mountains Area, New Mexico, James N. Naylor

Biology ETDs

The Sandia Mountains are a block-fault range which attained the present height and topography during the Pleistocene epoch. The mountains are located just east of the Rio Grande in north-central New Mexico between 35° 05' N and 35° 18' N and between 106° 22' W and 106° 30' W. The general climate of the area is arid continental but there is much variation between the climate at the foot of the mountains and the climate at the crest ridge. There are four U. S. Weather Bureau weather stations within the area and a comparison is made among the weather records …

Distribution And Ecology Of The Bats Of The Mogollon Mountains Area, Clyde Jones

Biology ETDs

The purpose of this investigation is to record information concerning distribution, ecology, and natural history, and to determine, if possible, the factor or group of factors that may influence distribution and activity of bats in the Mogollon Mountains area of southwestern New Mexico and extreme northwestern Arizona. A total of 1595 specimens of bats were collected on 101 occasions from 44 localities within the study area. Most of the specimens assembled for study were collapsed by mist nets placed over water tanks, over ponds and streams, or over entrances to mines and caves. A few specimens were shot. For nearly …

Nucleic Acids And Protein Synthesis, Sheldon Nicol

Honors Projects

The unprecedented growth of interest in protein synthesis among biochemists is both a result of, and has contributed to, our rapidly advancing knowledge of the chemistry and metabolism of the nucleic acids. Over the past two decades, evidence has accumulated which points to an intimate association between cellular nucleic acid and protein synthetic activity. A large number of experiments in bacterial systems have shown that ribonuclease disrupts the cell's protein synthetic machinery and that ribonucleic acid (RNA) can frequently restore it. Studies of bacterial transformation (Hotchkiss, 1957) and the discovery of the autonomous infectivity of tobacco mosaic virus RNA (Gierer …

A Comparative Analysis Of Amino Acids In Tetrahymena Pyriformis Under Feeding And Starvation Conditions, Jeanne Whitaker Clabough

Theses & Honors Papers

No abstract provided.

Laboratory Studies On The Effects Of Temperature, Relative Humidity, And Host Variations On Tetranychus Canadensis (Mcgregor) In Utah, Leland D. White

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

The four-spotted spider mite, Tetranychus canadensis (McGregor) has been identified from parts of seventeen states, Washington, D. C., and Danada since it was first recognized as a new species by McGregor (1950) from Ontario, Canada. During this thirteen-year period it has been reported on at least twenty-eight different host plants including ornamentals and orchard, vegetable, and forage crops.

Studies On The Relationship Of Serum Lipids And Dietary Intake Of Fat In Senior Citizens, Lina Wu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A number of research studies have shown that aging is a continuous and cumulative process of biological changes which frequently result in cardiovascular diseases in the older age group. Degenerative diseases of old age such as atherosclerosis and coronary artery diseases appear to be related to abnormal lipid metabolism. The findings which indicate serum cholesterol values rise with age are by no means unanimous. The combined evidence in the literature points out that serum cholesterol of newborn infants is low, then rises steadily with age in both sexes from adolescence through middle age with a higher value in males than …

A Study On The Biochemistry Of Riboflavin In Higher Plants As Influenced By Iron, Dayna L. Stocks

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

Riboflavin, 6,7-dimethyl-9-(D-1'-ribityl) isoalloxazine, has been studied extensively by workers in many fields of interest. Because of its almost universal occurrence in plants and its requirement by most animals as a vitamin, it is of interest to both the botanist and the zoologist. It is also of interest to the photochemist and its photo chemistry is currently being studied by several groups (27, 35, 47, 49). In addition riboflavin has been implicated in the photo inactivation of indole-acetic acid (16) and 2,4-D (20). It is also thought to be involved in the processes of bioluminescence (33, 48) and phototropism (17). At …

A Comparative Osteological Study Of Two Species Of Colubridae (Pituophis And Thamnophis), Robert E. Bullock

Theses and Dissertations

With reference to anatomical studies it appears that the aerpents are indeed a neglected group ot reptiles. Although some early writers recorded a few fragmentary obser-vations on the anatomy of snakes, no attempt was made to undertake a complete comprehensive study. Cole (1944) has rightfully referred to this section of vertebrate anatomy as "almost virgin field." The serpent area of reptilian anatomy is deserving ot a more intensive investigation because of the considerable number ot adaptations demonatrated by this group of reptiles in relation to their peculiar types ot locomotion and methods ot feeding. It is important to understand the …

Culture And O-Hydroxycinnamic Acid Content Of Excised Melilotus Roots, Larry G. Williams, Francis A. Haskins, Herman J. Gorz

Department of Agronomy and Horticulture: Faculty Publications

Excised roots of biennial sweetclover were successfully cultured through repeated transfers on a modified White's medium solidified with agar. Roots also grew well in shaker-agitated liquid cultures over the pH range 4.5 to 7.0. Exposure of the cultures to bright illumination resulted in submaximal growth. No net synthesis of o-hydroxycinnamic acid was observed in the cultured roots.

Arctic Health Research Center, U.S. Public Health Service, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A program of research in Alaska was initiated by the United States Public Health Service in 1948, with the establishment of a field station in temporary facilities located at Anchorage. This station, officially designated the Arctic Health Research Center in May 1950, was founded largely as the result of surveys of health conditions in Alaska conducted during 1946 and 1947 by two committees representing the American Medical Association. The reports of these committees led Congress to pass a special appropriation bill to support the investigation of health problems in Alaska.

Six research sections were set up within the first year. …

Effect Of Fluoride On The Respiration Of Leaves From Higher Plants, Ming-Ho Yu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies concerning the effects of fluoride on the metabolism of both animals and plants have been of interest to many workers. In plants, it has been known that fluoride will inhibit the growth, that it will induce chlorosis as an evidence of visible injury, and that necrosis will eventually result. The economic importance associated with fluoride damage has been widely recognized, and, as a consequence, fluoride has become a major problem of air pollution.

Studies Of The Incorporation Of 5-Fluorouracil Into Tobacco Mosaic Viral Rna By Cell-Free Synthesing Systems Isolated From Infected Tobacco Plants, Helen Lu-Sheng Wang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research on biosynthesis of tobacco mosaic virus (TMV) ribonucleic acid in vitro has been reported by a number of laboratories (8, 16, 17). Bonner et al. postulated that ribonucleic acid could be synthesized from nucleotides by chromatin extracted from nuclei of pea seedlings (5, 14, 22). The evidence from in vitro synthesis of viral RNA suggested that an enzyme, RNA polymerase, links the four nucleotides (ATP, UTP, CTP, GTP) with viral RNA present as a primer and magnesium ions participating as a catalyst (7, 8).

Influence Of Sodium And Calcium Chlorides In The Nutrient Solution On Secretions Of Salt Glands Of Tamarix Species, Don L. Chadwick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Salt glands are an adaptation for living in saline habitats possessed by several species of plants. In the family of Plumbaginaceae at least three mangrove genera, Aegialitis, Aegiceras, and Avicennia, possess salt glands according to Scholander (1962). Salt glands of the small ornamental shrubs, Statice gmelini, and Limonium latifoluim of the same family, were studied by Ruhland (1915) and Arisz (1955). Spartina townsendii of the Graminaceae and Tamarix petandra, Tamarix hispida, and Tamarix aphylla of the Tamaricaceae families also have the glands.

Neutral 17-Ketosteroids And 17, 21-Dihydroxy-20-Ketosteroids In Urine Of University Students, Shon-Hua Yu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Degenerative disease of old age such as atherosclerosis and cerebral hemorrhage appear to be related to abnormal lipid metabolism. Many investigators have studied the role of steroid hormones on lipid and cholesterol metabolism in rats and chickens. The results have consistantly indicated that both corticosteroids and sex hormones play an important role in the regulation of lipid and cholesterol metabolism, in vivo. Serum cholesterol values in humans have been decreased by estrogens, while androgen administration tends to increase circulating cholesterol. Estrogens have been shown to decrease circulating cholesterol and prevent cholesterol-induced coronary atherosclerosis in chickens. A study of the …

Production And Waterfowl Utilization Of Sago Pondweed (Potamogeton Pectinatus) On The Marshes Of The Bear River In Northern Utah, Robert Leon Craner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

According to MCAtee (1918), Mabbott (1920), Martin and Uhler (1939) and other leading waterfowl food habit authorities, sago pondweed (Potamogeton pectinatus) is one of the most important waterfowl food plants in the United States. The seeds, vegetative leaves and stems, and the tubers of this plant are apparently sought by waterfowl.

A History Of Timber Resource Use In The Development Of Cache Valley, Utah, Douglas M. Bird

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It has long been realized that the forests and forest products contributed very significantly toward the economic development of the Western United States. However, the extent of this contribution over a relatively small area has never been fully analyzed. Therein lies the primary justification for this paper. The author hopes that the readers of this paper will, through their reading, gain some appreciation of the major role the forest and its products played in the development of the western community.

Because of some important social differences between the area described in this paper and other western communities, the history herein …

On The Behavioral Responses Of Free Uinta Ground Squirrels To Trapping, David F. Balph

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Biologists often trap animals to obtain information on them. If trapping is selective toward some animals, the information may be inaccurate. Most mammalogists know or suspect that their trapping techniques (reviewed by Hayne, 1949; and Stickel, 1954) contain sources of bias. Since trapping remains the only feasible way to obtain information on many animals, researchers have tried to discover sources of sampling error and refine their techniques. They have found that one major source of difficulty may lie in the behavior of animals. Individual animals seem to respond differently to trapping, both initially and through learning (Geis, 1955; Crowcroft and …