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A Computer Simulation Study Of Blood Cholinesterase Inhibition In Parathion Treated Rats, Scott Christopher Hennes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A computer simulation model of blood cholinesterase inhibition in rats resulting from a single oral or dermal dose of parathion was developed and tested. The model consists of a set of non-linear differential equations describing the absorption, distribution and metabolism of parathion and the kinetics of inhibition and reactivation of erythrocyte and plasma cholinesterase. The equations are numerically integrated to produce the time-course of each of the cholinesterase activities of the blood. The model was tested for validity by a comparison of the activities predicted by the model to values determined experimentally in male rats. The model successfully simulated plasma …

The Effects Of Tri-O-Tolyl Phosphate (Totp) On The Immune System Of Mice, Craig R. Brinkerhoff

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

TOTP is a prevalent industrial and environmental contaminant which has been shown to be a neurotoxic agent. This study was undertaken to investigate the effects of this compound on the immune system. Several techniques were employed to test the humoral as well as cellular effects. Male Swiss Webster mice were administered by gastric gavage with three doses of TOTP (5, 50, and 500 mg/kg) and one dose TMTP (50 mg/kg) in corn oil once a week for 13 weeks. Control animals were given corn oil alone.

Lymphocyte transformation was determined on cultures of splenic cells obtained from animals sacrificed at …

Rangeland Resource Inventory Of The Six-County Area Of Utah, Verl L. Bagley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The intent of this study is to estimate rangeland acreages, forage production, and potential forage production in Utah's Six-County Area (Juab, Millard, Piute, Sanpete, Sevier, and Wayne Counties). Acreages were classified by range site, climatic zone and by stage of plant community succession. Range site production data collected since 1953 by the U.S. Soil Conservation Service on Utah's rangelands provided a basis for estimating both present and potential forage production.

Comparison Of The Mineralogy And Morphology Of Some Cambic And Argillic Horizons In Soils Of Northern Utah, Randal Jay Southard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The mineralogy and morphology of a soil with a cambic horizon (Stingal) and a soil with an argillic horizon (Hansel), occurring in northern Utah, were studied. Pedons representing the central concept of each of the soils were sampled by genetic horizon for laboratory analyses. Particle- size distribution, calcium carbonate equivalent, cation-exchange capacity, organic carbon , and the mineralogy of the silt, coarse clay, and fine clay fractions were determined. Thin sections of the soils were examined with a petrographic microscope. Selected peds were observed using a scanning electron microscope, and elemental analyses were made with an x-ray analyzer.

The two …

Job Competencies, Employment Demands, And Perceived Training Needs In Production Agriculture In Utah, James O. Summers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was limited to 165 farmers involved in various segments of production agriculture in the state of Utah. County agents and vocational agriculture teachers in each county nominated these farmers as candidates according to their respective farming operations.

The following six defined areas of production agriculture were used as selection criteria to insure equal input in the study: Beef, Dairy, Swine, Sheep, Poultry, and Crops. All farmers were surveyed by means of persona l interviews conducted by either county agents or vocational agriculture instructors in their respective counties. The surveying instrument used was developed through a thorough review of …

The Effect Of Exploitation On Some Parameters Of Coyote Populations, Robert P. Davison

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study was conducted to examine the effect of exploitation on population parameters of coyotes (Canis latrans). Hypotheses tested were: (1) Substantial levels of exploitation do not change spring and fall coyote densities significantly; (2) Coyote recruitment (reproduction and immigration) rates are unaffected by substantial levels of exploitation; (3) Annual coyote survival rates are not related to intensity of harvest rates; (4) Coyote emigration rates remain unchanged by substantial levels of exploitation. Coyote demographic parameters were measured from 1975 to 1978 for a treatment population subject to substantial exploitation (Curlew Valley, Utah and Idaho), and for an unexploited …

Humoral And Secretory Immunoglobulins Of The Sheepshead, Archosargus Probatocephalus, A Marine Teleost, Craig J. Lobb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The sheepshead has two readily isolatable humoral immunoglobulins, a 16S tetrameric form and a 6S monomeric form. The 16S tetrameric form is composed of two subpopulations, one being a disulfide linked form (~700,000 daltons) and the other a noncovalently linked population of predominantly disulfide linked dimers (~350,000 daltons). The 6s immunoglobulin (~140,000 daltons) is composed of two noncovalently linked units (~70,000 daltons) each having one heavy and one light chain. The 6S immunoglobulin is antigenically deficient to the 16S immunoglobulin, this deficiency may be due to the heavy chain of the 6s protein lacking a~25,000 dalton segment present in the …

The Ferns Of The Rancho Del Cielo Region, Lawrence Victor Lof

Theses and Dissertations - UTB/UTPA

This paper contains a key to the fifty-seven fern species found on the eastern slope of the Sierra de Guatemala in southern Tamaulipas Mexico. Included are descriptions and drawings of each of the species In addition, the climate and its relation to the unique flora of the area is discussed.

Distribution And Ecology Of Cavernicolous Coleoptera In Bat Cave, Carter County, Kentucky, David Bruce Conn

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 by David Bruce Conn on April 28, 1980.

An Investigation Into A New England Fisheries Development Project: Towards The Expansion Of The Whiting Fishery, J. H. Kaelin

Marine Affairs Theses and Major Papers

In 1973, the New England Fishery Development Program (NEFDP), an industry/government partnership was formed to offset a portion of the economic decline of the New England fishing industry while encouraging the development of underutilized species and nontraditional fishery products. The purpose of this paper is to examine one of the NEFDP's development projects and to comment on its apparent success. This paper attempts to determine if domestic processors can be expected to produce whiting fillet blocks that can compete in the market place with foreign imports. Several aspects of the problem are favorably resolved-an abundant whiting resource is available; the …

Abstracts Of Papers, 92nd Session, Iowa Academy Of Science, April 18-19, 1980, Iowa Academy Of Science

Iowa Academy of Science Documents

Presentation abstracts from the annual meeting of the Iowa Academy of Science

The Annual Meeting Of The Iowa Academy Of Science April 18-19, 1980 [Program, 92nd Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Lagurus Curtatus, Lynn E. Carroll, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Lagurus Gloger, 1841

Mustela Nigripes, Conrad N. Hillman, Tim W. Clark

United States Department of Agriculture Wildlife Services: Staff Publications

CONTEXT AND CONTENT. Order Carnivora, Family Mustelidae, Genus Mustela, Subgenus Putorius. There are about 14 living species of Mustela including three of Putorius. No subspecies of M. nigripes have been recognized.

DIAGNOSIS. Mustela nigripes is about mink-sized; upper parts are yellowish buff, occasionally whitish, especially on the face and venter (Fig. 1); feet are black; tail is tipped with black; mastoid process is notably angular (Fig. 2) (Long, 1965). Ferrets (subgenus Putorius) differ from other Mustela (weasels and mink) in being larger than weasels and in having the following combination of characters: ventral and dorsal pelage without …

Relationship Between Relative Brain Size And Climbing Ability In Peromyscus, Cliff A. Lemen

School of Natural Resources: Faculty Publications

Eisenberg and Wilson (Evolution, 32:740-751, 1978) have documented an interesting relationship between the relative brain size of bats and the complexity of the habitat in which they forage. They found that bats that fly and forage through foliage have larger brains relative to their body size than those that forage in open air. Their explanation was that bats in the complex habitat must process more complex sonic information to navigate through the foliage. In order to do this a larger brain is required.

The Peromyscus of North America may offer a similar paradigm as far as habitat complexity …

South Dakota Farm And Home Research, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

Director’s Comments [p] 2
Plugged Plastic [p] 3
Sensing R-value in Walls [p] 5
No Overnight Answers [p] 7
Update: Alcohol Fuels [p] 10
Counterattack on Hessians [p] 12
Analytical Services [p] 14
Enzyme Inquiries [p] 18

A Study Of The Water Quality In A Closed Deinking Operation, John A. Fortunato

Paper Engineering Senior Theses

In studying the effects of deinking newspapers using recycled water, I found that the suspended solids hampered the efficiency of the operation and lowered the quality of the paper being produced. Biological activity in the water also plays an important role in the water quality of the system, and thereby the paper quality. Several of the water quality tests performed showed that the contaminants in the water will reach a plateau (equilibrium) region where no significant change is noticed. This implies that a closed system should be able to tolerate a moderate build up of some contaminants and still operate …

A Study Of Starches At The Size Press, Robert M. Mcdonald

Paper Engineering Senior Theses

A literature research is presented concerning the five different starches which were used. Also covered were size presses and how they affect paper properties. BOD was also covered, and how starch has a tremendous effect on it. The literature research indicates there are few quantitative results in this area.

The objective of the experimental work was to compare five different starches, applied at the size press, for physical and optical properties, and also BOD. The starches used were an ethylated, an oxidized, a cationic, a thermal-chemical and a thermal-chemical cationic. These five starches were applied at three solids levels and …

The Social Ecology Of Coyotes, Marc Bekoff, Michael C. Wells

Ethology Collection

No abstract provided.

Studies Of The Reorientational Relaxation Of Pyridine In Water By Depolarized Rayleigh Light Scattering, C. H. Wang, Scott L. Whittenburg, P. A. Lund, D. H. Christensen

Chemistry and Biochemistry Faculty Publications

The depolarized Rayleigh spectra of aqueous solutions of pyridine have been studied using a high‐finesse Fabry–Perot interferometer as a function of temperature and concentration. The Rayleigh relaxation times are found to have a complex concentration and viscosity dependence. The classical Stokes–Einstein–Debye equation for molecular reorientation breaks down in this system. The Rayleigh relaxation time of pyridine molecules is not determined by the macroscopic shear viscosity of the solution. The specific interaction due to the formation of hydrogen bonds between pyridine and water molecules plays a very important role in affecting the relaxation time. At a fixed temperature the plot of …

The Chemical Buildup In A Closed Water System Using Recycled Fiber Furnish, Stephen R. Tremont

Paper Engineering Senior Theses

In recirculating whitewater in a closed water system, the solids will increase leading to operational problems such as corrosion, scale, reduced drainage rates, reduced wire life, increased temperatures, felt plugging, foam, and dirt. In dealing with these problems, whitewater samples from a conventional seven vat cylinder board machine were tested for chemical composition. The machine operates on a closed water loop and produces approximately 250 tons per day recycled boxboard. Tested anions included chloride, silica, phosphates, nitrates, sulfate, sulfide and tannin-lignin. Cations analyzed included calcium, barium, iron, aluminum and copper. Tests were conducted over an eighteen day machine running period …

Agricultural Experiment Station News April 1980

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S OFFICE
1972-73 ENROLLMENTS
PROJECTS APPROVED FROM JANUARY THROUGH MAY 1980
GRANTS AND CONTRACTS
PERSONNEL ACTION FROM JANUARY THROUGH MARCH 1980
FEATURE ARTICLE: AGRICULTURAL MECHANIZATION – WHO WINS? WHO LOSES?
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - March 1980
BULLETINS PRINTED

Owen's Vertebral Archetype And Evolutionary Genetics: A Platonic Appreciation, Scott F. Gilbert

Biology Faculty Works

No abstract provided.

Biological Studies On Some Ghanats Of Iran, Fardin Oliaei

Masters Theses

The present study was undertaken to monitor the quality of drinking water in the ghanats of Tehran during 1978-1979. Four sites were chosen, and various limnological parameters were investigated.

Physical-chemical analyses were evaluated to determine the composition of the water. There was no significant pollution related to chemical-physical parameters.

Planktonic samples were analyzed with the aid of a Sedgewich-Rafter counting cell. A total of 47 genera were found in all four ghanats.

The planktonic population declined dramatically in winter. Mean diversity and equitability of the algae showed no significant level of pollution and degradation in the study areas.

Bacterial content …

Population Dynamics Of Small Mammals In Two Plant Communities Of The Merritt Island National Wildlife Refuge, Jeffrey A. Goldberg

Retrospective Theses and Dissertations

No abstract provided.

Population Ecology Of The Beach Mouse, Peromyscus Polionotus Niveiventris, Douglas Dale Extine

Retrospective Theses and Dissertations

No abstract provided.

The Effects Of High Cheese Diets On Brain Serotonin And Alcohol Consumption, Beverly A. Utt

Loma Linda University Electronic Theses, Dissertations & Projects

Male weanling rats were placed on a nutritionally adequate casein diet and randomly assigned to one of eight groups. The first four groups were force fed alcohol for 22 days prior to the experimental phase of the study, while the last four groups had access to water only. Upon commencing the experimental phase each group was given one of the following diets: continuation of the casein diet; Cheddar; Limburger; or Roquefort cheese diets, along with the choice of alcohol and/or water. The particular cheeses were chosen for their ability to raise brain serotonin levels (62) . Alcohol consumption was measured …

"Blinding" Of Shoots And A Leaf Gall In Amsinckia Intermedia Induced By Anguina Amsinckia (Steiner And Scott, 1934) (Nemata, Tylenchidae), With A Note On The Absence Of A Rachis In A. Amsinckia, C. Nagamine, Armarnd R. Maggenti

Harold W. Manter Laboratory of Parasitology: Faculty Publications

"Blinding" and a leaf gall induced on Amsinckia intermedia Fisch. and Mey. by Anguina amsinckia (Steiner and Scott) are described. A. amsinckia induced blinding by galling the terminal apical meristem of its host. The leaf gall was formed by a ventral curling of the distal edge of the leaf. The absence of a rachis in the ovary of A. amsinckia is noted.

Sarcocystis Of Passerine Birds: Sexual Stages In The Opossum (Didelphis Virginiana), Edith D. Box, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Sexual stages of a Sarcocystis of passerine birds were demonstrated by feeding muscle cysts from cowbirds (Molothrus ater) and grackles (Cassidix mexicanus) to opossums (Didelphis virginiana). Opossums were examined at necropsy at 36 h, 13.5 days, and 29.5 days post-inoculation (PI). Large numbers of macro- and microgamonts were present in the small intestine 36 h PI, while only sporocysts and oocysts were present 13 days or more PI. Microgamonts in different stages of development were in the intestinal epithelium above the nucleus and macrogamonts were at the base of the epithelial cells or in …

Effects Of Selenium On 1, 2-Dimethylhydrazine (Bmh) Metabolism And Dna Alkylation, Philip Robert Harbach

Masters Theses

No abstract provided.