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A Comparison Of Glucose And Acetate Metabolism During Spore Germination In Phycomyces Blakesleeanus, Colin A. Campbell

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

Some Aspects Of Carbohydrate Metabolism In The Cercariae Of Schistosoma Mansoni Sambon, 1907, A. Eugene Dunham Jr.

Loma Linda University Electronic Theses, Dissertations & Projects

Cercariac of Schistosoma mansoni were studied for glycogen utilization, uptake of glucose from solution, lactic acid production, and respiration.

Using the anthrone method of determination of carbohydrate, the amount of glycogen used by a single cercaria in 4 hours is determined as 43.2 x 10^-4 μg ± 6.6 x 10^-4 μg.

Glucose was not observed to have been used from solution under the conditions of the experiment, even in the presence of trehalose. The determinations were made by the Glucostat method.

After deproteinization and desugarization, aliquots of supernatant from cercarial suspensions were analyzed for lactic acid using p-phenylphenol …

Concurrent Infections Of Schistosoma Mansoni And Trypanosoma Equiperdum In Mice, Venus Ee-Siriporn

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this investigation was to determine factors which may influence the survival time of mice infected with Trypanosoma equiperdum and the effects of T. equiperdum on mice infected with Schistosoma mansoni.

In order to maintain experimentally obtained standard hours of survival (88 hrs) in mice inoculated intraperitoneally with 150,000 T. equiperdum, it was found that trypanosomes removed from the donor rat should be kept at 25 C and all counts, dilutions of the organisms, and injection should be completed within 1 hour after removal from the donor host. Survival time of mice is increased as the …

The Effect Of Cesium-123 On Cesium-137 Uptake By Tissues In The Laboratory Rat, Richard Riley Tokarz

Biology ETDs

The effects of stable cesium-133 on cesium-137 metabolism were studied to better define mechanisms of cesium transport and binding by rat tissues. The extent to which the hypothetical cesium transport system can be overloaded was examined by giving cesium-133 and cesium-137 intraperitoneal injections within short time intervals. Whole animal and isolated tissue counts were made with a small animal whole body counter. Stable cesium-133 (0.02 g per animal) injected from 3 minutes to 24 hours prior to cesium-137 (0.15 ml containing 0.24 µCi per 100 g body weight) had little effect on the uptake of cesium-137 by tissues. Expressing data …

Normal Development Of The Aortic Isthmus, Elizabeth Short

Yale Medicine Thesis Digital Library

The development of the aortic isthmus, that region of the arch of the aorta between the left subclavian artery and the attachment of the ligamentum arteriosum, has received little attention. While the developmental history of the ductus arteriosus and foramen ovale has been well documented, as have the cardiac malformations associated with failure to complete this developmental sequence, little work has been done to define the normal sequence of isthmus development in its transition to an adult configuration in the postnatal period. It has long been recognized that the cardiac malformation known as infantile or preductal coarctation of the aorta …

Studies Of Diet As A Factor In 137-Cesium Metabolism In Rats, Morris Burton Snipes

Biology ETDs

Effects of diet on ¹³⁷Cs retention and distribution in the rat were examined. After a 7-day period, retention of an intraperitoneal dose of ¹³⁷Cs was higher than control values for rats fed semistarvation, high carbohydrate, high protein, and high fat diets. Relative distribution of ¹³⁷Cs among tissues .was examined considering changes in tissue composition due to diet variation. The primary effect of diet on cesium metabolism was a modification of cesium excretion via urine and feces. There appeared to be a direct relationship between mass of fecal material and the amount of ¹³⁷Cs excreted in feces. …

Geographical Variation Of The Apache Pocket Mouse In New Mexico, Daniel F. Williams

Biology ETDs

The geographic variation of Perognathus apache Merriam in New Mexico was investigated to determine the relationship of P. apache to P. flavescens Merriam and the relationships of the subspecies of P. apache to each other. Skin and skull measurements of adult specimens were analyzed statistically. Relative color values for adult specimens were estimated by selecting two individuals as color standards and comparing the other specimens with the standards. Apache pocket mice from southwestern New Mexico were found to be closer in size and proportions to the smaller P. flavescens from eastern New Mexico than to the larger Apache pocket mice …

A Comparative Food Habit Study Of Two Species Of Kangaroo Rats - Dipodomys Ordi And Dipodomys Merriami, Marilyn Kobylack Dunham

Biology ETDs

The present study was undertaken to investigate the food habits in two species of kangaroo rats, Dipodomys ordi Woodhouse and Dipodomys merriami Mearns, by comparing the seeds that they store in their cheek pouches. Since both species of kangaroo rat occur sympatrically at many places in the Southwest, Gennaro (1966) has concluded that interspecific competition with D. ordi might serve to limit the northern distribution of D. merriami in the Rio Grande Valley of New Mexico. The nature of this interspecific relationship was investigated through a comparison of the seeds of both species.

Investigations have revealed that there is a …

Behavioral Changes In Ants During Radiation Exposure, Niel Henry Milton Berg

Biology ETDs

There are only a few reports concerning the response of ants to irradiation and the majority of these are based on unpublished work. Apparent misinterpretations regarding the avoidance by ants of irradiation have occurred because of confusion as to dose, dose rate, and the type of radiation used. The only apparent demonstration of ant avoidance to radiation was made using x-rays at dose rates of 50-70 r/sec, although one author cites evidence for an ant avoidance response to 10 r/hr of 137Cs gamma rays.

In the present study, queen ants of the genus Pogonomyrmex, and worker ants of the species …

A Study Of The Extent Of Spread Of Infestation, Effects, And Possible Control Of The Tent Caterpillar In Lewis County, Kentucky, Edna Mae Love

Morehead State Theses and Dissertations

A thesis presented to the faculty of the Graduate School at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Arts by Edna Mae Love on May 22, 1968.

The Soluble Antigens Of Pasturella Pestis, Loris William Hughes

Biology ETDs

The soluble antigens of a virulent, newly isolated strain of Pasteurella pestis were compared to the anti­gens of an avirulent, well-documented strain (A-1122). The virulent strain gave two immunogenic fractions when passed through a Sephadex G-200, superfine column. The avirulent strain gave four. All fractions from both strains had a common antigen. The method of Sephadex separation appeared to be an excellent means for the separation and purification of the soluble antigens of P. pestis.

The Specific Suppression Of The Primary Immune Response By Passive Administration Of Mouse Antibody Fractions, Catherine Spain Safford

Biology ETDs

The primary immune response can be specifically suppressed by the passive administration of the homologous antibody close to the time of the primary antigenic stimulus. Although the mechanism of this antibody-mediated suppression of the immune response has not yet been elucidated, it is known that both ϒM ( (19S) and ϒG (7S) antibodies can function as inhibitors, ϒG antibodies being approximately 100 to 200 times more effective than ϒM antibodies. In mice and in several other animals the ϒG antibody has been further separated into two subclasses, designated 7Sϒ₁ and 7Sϒ₂ globulins. These two classes are distinguished by …

The Effects Of Laminar Air-Flow On The Viability Of Microorganisms, Royce M. Brockett

Biology ETDs

The effect of laminar air-flow on the viability of microorganism was investigated. The related factors of inoculum size and carrier medium were also studied. The test surface used in this study was stainless steel. Microorganisms were placed on the test strips and exposed to laminar air-flow. After the chosen exposure period the test strips were placed in a sterile petri dish and covered with tryptic soy agar. Viable counts were taken as the number of colonies developing after incubation. Viable counts obtained with this direct plating method were briefly compared with viable counts obtained by two other assay methods.

It …

Cultivation Of Trypanosoma Peromysci From Two Species Of Peromyscus, Norman R. Dollahon

Biology ETDs

Trypanosomes from mice of the species Peromyscus boylii and Peromyscus truei were isolated and cultured in NNN medium and in trypticase soy medium. A continuing culture of trypanosomes developed from blood of mice of the species P. truei. Trypanosomes from the blood of mice of the species P. boylii did not adapt to continuing cultures, but crithidias and rosettes were observed.

The cultures were incubated at temperatures of 1.5 C, 22 C, and 37 C. The organisms incubated at 1.5 C never advanced beyond the crithidial form, but they were observed in the culture medium after 40 days. The organisms …

A Study Of The Flora Of The Cochiti And Bland Canyons Of The Jemez Mountains., Charles W. Robertson

Biology ETDs

Cochiti and Bland canyons are adjacent steep-walled canyons in the Jemez Mountains. The canyons range in elevation from 6,000-8,500 ft and open into the Rio Grande Valley. The former has permanent water, the latter does not. Cochiti Canyon is constricted at its mouth and widest near its head.

The Canadian, Transition and upper Sonoran life zones are represented in the study area. Due to the variety of exposures these zones seldom occur exclusively over large areas. The varied topography, volcanic outcroppings, disturbance by man, and water supply all contribute to the extreme diversity and variety of the flora. The flora …

The Effects Of Radiation And Temperature Stress On An Aquatic Ecosystem, Gene L. Samsel Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Gene L. Samsel, Jr. on May 14, 1968.

Seasonal Changes In Fat Content Of The Big Brown Bat, Eptesicus Fuscus, Neil S. Weber

Biology ETDs

Bats were collected from 22 April 1967 through 30 September 1967 from various localities in New Mexico. Eighty-one individuals were desiccated in a vacuum desiccator, after which total body fat was extracted with 95% ethanol and petroleum ether. Data are presented on total body water and total body fat. Total body fat increases from April to September. Comparison of males and females reveals that both sexes have the greatest increase in body fat sometime in September.

A Serological Estimate Of Monzygotic Twinning In Sheep, William D. Stansfield

Biological Sciences

No abstract provided.

Marine Fungi Of Iceland: A Preliminary Account Of Ascomycetes, A. R. Cavaliere

Biology Faculty Publications

This paper reports, for the first time, 25 species of marine pyrenomycetes from Icelandic waters. Taxonomic notes are included for certain species.

Surtsey, a submarine volcanic upthrust off the south coast of Iceland (Thorarinsson, 1967), is a current center for cooperative geophysical, geochemical, and biological investigations on an international scale. The mycological portion of the total biological research effort of the Surtsey project has emphasized a survey of the marine and freshwater mycoflora on the mainland of Iceland itself as a necessary prerequisite to ecological studies on Surtsey. With the exception of two reports on aquatic phycomycetes (Larsen, 1931, and …

Daily Nest Opening And Closing Of The Ant Pogonomyrmex Californicus, Lynn R. Heath

Loma Linda University Electronic Theses, Dissertations & Projects

In a study of timing in this ant ten of the twelve nests which were observed opened synchronously in the morning and closed in the evening. However, one was never seen to close and another closed during the day and stayed open at night.

A seasonal progression was shown by later opening times and earlier closing times. Opening and closing temperatures at the surface of the ground and three inches deep showed no seasonal progression.

In most cases the days when the nests opened the earliest the temperatures at opening time were the highest.

Soon after nests had closed they …

Systemic Studies Of The Genus Gila (Cyprinidae) Of The Colorado River Basin, Paul Bernard Holden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three Hundred and nine specimens of Gila from the Colorado River basin were studied. A form of numerical taxonomy, taximetrics, was used to help classify the specimens. The data from these fish indicate that many of the present hypotheses concerning their taxonomy are not valid. The concept of ecosubspecies or ecological subspecies does not fit the Colorado basin Gila. The roundtail and bonytail chubs, G. robusta Baird and Girard and G. elegans Baird and Girard respectively, currently treated as subspecies, are well separated morphologically, ecologically and reproductively and therefore are better considered two valid species. The relationship between G. …

Floral Morphology And Phylogeny In The Hydrocharitaceae, Robert B. Kaul

School of Biological Sciences: Faculty Publications

The vascular anatomy of 13 of the 15 genera of the Hydrocharitaceae has been studied, and certain aspects of floral morphology are considered. The flowers of the family show a broad range of specialized structures combined with primitive characteristics. The origin of paired and single stamens is interpreted as probable modifications of fascicled stamens. Extreme reduction in the androecium is shown for several genera. Tendencies toward reduction and fusion within the gynoecium are pronounced. Most genera are at least slightly syncarpous, but a few are apocarpous. The inferior ovary is appendicular in nature, with some genera exhibiting more complete fusion …

Floral Development And Vasculature In Hydrocleis Nymphoides (Butomaceae), Robert B. Kaul

School of Biological Sciences: Faculty Publications

The flower of Hydrocleis nymphoides consists of three sepals which arise in spiral succession, three simultaneously arising petals, numerous stamens and staminodia which arise in centrifugal order, and six carpels. A residual apex remains at maturity. The first-formed members of the androecium are stamens and the later-formed members are staminodia which develop below the stamens and which become outwardly displaced during expansion of the receptacle. The androecium is supplied by branching vascular trunk bundles. The carpels are completely open but the ventral margins are slightly conduplicately appressed basally. A single dorsal bundle provides the stigmatic area with vascular tissue, and …

Acid Phosphate Activity In Tobacco Mosaic Virus Susceptible And Hypersensitive Varieties Of Burley Tobacco, David J. Saxon

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by David J. Saxon on January 23, 1968.

Studies In Locomotion And Anatomy Of Scombroid Fishes, Harry L. Fierstine, Vladimir Walters

Biological Sciences

Acceleration rates, analyses of body movements, and pertinent anatomical features are given for various members of the Scombridae, Istiophoridae, and Xiphiidae and are discussed in light of the modern work on smaller freshwater teleosts and marine cetaceans.

Acceleration values up to 43.1 m/sec² are given for Thunnus albacares and Acanthocybium solanderi. Nearly 100% of the propulsive thrust comes from the caudal fin. There are two main intervertebral joints which are concerned with locomotion, a pre-peduncular and a post-peduncular joint with the body and peduncle held almost stiff, a condition similar to that described for marine cetaceans. The caudal …

Biological Aspects Of Heat Pollution, Theodore Olson

Journal of the Minnesota Academy of Science

The importance of temperature as an environmental factor has long been recognized by the ecologist, and its special impact upon the aquatic ecosystem has been of interest to aquatic biologists since they first began to observe interactions between living things and the physical environment. Interest in water temperatures as an environmental factor has recently become more widespread; and one aspect of the phenomenon, namely "thermal pollution," has attracted special attention.

Some Aspects Of The Symbionts Of Cassiopeia Frondosa, Dolores Ahles O.S.F.

Journal of the Minnesota Academy of Science

Symbiodinium microadriaticum were found localized in the mesoglea of Cassiopeia, the upside-down jellyfish. Axenic cultures of the symbiont were produced, utilizing chemically defined media. Studies of the life cycle established the presence of isogametes which had previously been postulated. Reactions to various bands of the spectrum were noted, and tolerance tests for survival in darkness and under temperature stress were carried out. Nutritional experiments established nitrates as the best nitrogen source and verified the fact that vitamins B12 and Thiamine, though not essential far life, hove a stimulating effect on the growth and motility of these zooxanthellae.

Distribution And Abundance Of Molluscs In A Fresh Water Environment, Peter Moyle, James Bacon

Journal of the Minnesota Academy of Science

The molluscs of o northwestern Minnesota lake were sampled using transects, a sampling frame, and SCUBA. The species sampled were: Amnicola limosa, Valvata tricarinata, Gyraulus parvus, Physa cf. P. gyrina, Helisoma anceps, H. campanulata, Promenetus exacuous, Ferrissia parallela, Anodonta marginata, Lampsilis siliquoidea, and Sphaerium cf. S. striatum. The unionid clams, the adult Helisoma spp. and the Physa adults were associated with the absence of aquatic vegetation. Distinct associations of snail species were found with each plant association: G. parvus and V. tricarinata with the deep water Nitella opaca association, A. limosa and V. tricarinata with the mid-depth mixed macrophyte association, …

Characteristics Of Four Marl Lakes As Related To Biological Productivity, J. E. Maloney, John Dobie, John B. Moyle

Journal of the Minnesota Academy of Science

Physical and chemical characteristics of four dimictic eutrophic lakes of northcentral Minnesota with marl deposits are discussed in relation to production of invertebrate animals (benthos and plankton) that are the basic food of fish . Two of the lakes have a history as "productive" fish lakes and the other two as "problem" fish lakes. The "productive" lakes, as a type, have a larger surface area, a longer shallow-water littoral shelf, and a lower proportion of marly soils in the littoral zone than do the "problem" lakes. The standing crop of invertebrates was about twice as great per habitat unit in …

Invertebrate Fauna And Environment Of Deposition Of The Niobrara Formation (Cretaceous) Of Kansas, Halsey W. Miller

Fort Hays Studies Series

This paper reevaluates, and where desirable, synonymizes species. Previously unrecorded species are described and illustrated. The environment of the Niobrara Formation in Kansas is described. The author collected specimens in Scott, Logan, Gove, Trego, Rooks and Phillips Counties, Kansas.