Digital Commons Network^™

Effects Of Temperature And Salinity On The Osmotic Adjustment In The Euryhaline Rainbow Trout, Salmo Gairdneri Richardson And The Stenohaline Channel Catfish, Ictalurus Punctatus (Rafinesque)., Ronald Marvin Block

Theses and Dissertations

No abstract provided.

The Biological And Economic Aspects Of Cage Rearing Rainbow Trout, Salmo Gairdneri Richardson, In North Dakota., Douglas Robert Hahn

Theses and Dissertations

No abstract provided.

Hepatic Ornithine Metabolism In Hydrazine-Treated Rats, Van Saxton Hubbard

Theses and Dissertations

Ornithine plays an important role in mammalian intermediary metabolism. Ornithine can be (1) utilized as a component of the urea cycle, (2) decarboxylated to form putrescine, a precursor of the polyamines, spermidine and spermine, and (3) converted metabolically to arginine, proline and glutamate. In prior investigations conducted in our laboratories and others, free endogenous hepatic pools of ornithine were found to be elevated following hydrazine administration. Consequently, time-course alterations of arginase, ornithine δ-transaminase, ornithine transcarbamylase, and ornithine decarboxylase activities were investigated regarding the effect of hydrazine treatment on hepatic ornithine metabolism in the rat. As an outgrowth of these investigations, …

Synthesis And Evaluation Of Some Arylalkenyl And Arylepoxyalkyl Hydrogen Succinates And Hydrogen Glutarates As Inhibitors Of Rat Liver Β-Hydroxy-Β-Methylglutaryl Coenzyme A Reductase, Paul Emil Marecki

Theses and Dissertations

Atherosclerotic disease is an almost universal phenomenon and increases in severity and frequency with increasing age. Atherosclerosis may contribute to several disorders including bursting of an artery, blockage of an artery, or induction of arterial clotting. The culmination of these diseases is usually premature since at the time of death the unaffected organs are in reasonably satisfactory condition and could have operated for several more years. Among the many factors which act in concert to produce the disease, serum cholesterol levels play a central role. It has been suggested that the lowering of cholesterol levels will provide an effective means …

Maze Acquisition In The Zinc Deficient Rat, Paige M. Lokken

Theses and Dissertations

Interest in the role played by trace minerals in brain development and the subsequent effect on learning is recent. Biochemically a great number of studies on zinc have been done, but in only one other laboratory have the behavioral consequences of a zinc-deficiency been looked at. The present study attempts to partially replicate the previous studies and to explore the behavioral effect of a zinc-deficiency in a different manner. In the postnatal study, dams were made zinc-deficient from the day of delivery until weaning of the pups occurred (21 days). Paired animals were fed the same amount of food as …

Distribution Of S-Adenosylhomocysteine Hydrolase, S-Adenosylhomocysteine Nucleosidase, S-Ribosylhomocysteine Cleavage Enzyme And Homoserine Dehydratase In Various Species, Robert D. Walker

Theses and Dissertations

Microorganisms, plants and the major organs from cold and warm blooded vertebrates ware assayed for the presence of S-adenosylhomocysteine hydrolase, S-adenosylhomocysteine nucleosidase, S-ribosylhomocysteine cleavage enzyme and homoserine dehydratase.

S-Adenosylhomocysteine hydrolase was found in all yeasts and plants assayed and in the livers of all cold blooded vertebrates assayed except the Polyodon spathula (Paddlefish). Liver extracts from all warm blooded vertebrates except the Odocoileus hemionus (Mule deer), Odocoileus virginianus (Whitetail deer) and Homo sapiens (human) were also found to possess S-adenosylhomocysteine hydrolase. This enzyme was also found in the spleens of the Ictalurus punctatus (Channel cat), Perca flavescens (Yellow perch) and …

Ecology And Life History Of The Raccoon (Procyon Lotor Hirtus Nelson And Goldman) In The Northern Part Of Its Range, Wayne Fraser Cowan

Theses and Dissertations

A study of the ecology and life history of the northern raccoon Procyon lotor hirtus Nelson and Goldman, 193C) was conducted in southwestern Manitoba between June, 1967, and August, 1969. Information concerning growth, development, reproduction and population characteristics was gathered from carcasses of 293 raccoons of juvenile, yearling, and adult age. Seasonal activities and home ranges were determined by marking 81 mobile raccoons and 13 nestlings, and by recaptures of 27 of these. Movements of 11 raccoons were monitored electronically, A total 1,109 scats and 298 stomachs and colons were analyzed for food content and to determine seasonal requirements of …

The Effects Of Intrauterine Shock On The Emotionality Of The Offspring In The Albino Rat, Mary B. Mehrer

Theses and Dissertations

Recent research with animals indicates that stress applied during pregnancy can influence the emotionality of the offspring (Thompson, 1957; Fazzaro, 1971). The present study x^as designed to investigate the effects of escapable versus inescapable electric shock, administered during pregnancy, on the behavior of the offspring. Female Sprague-Dawley albino rats were mated and placed into three groups. Group I females were given daily sessions of twenty-five, escapable, 0.6mA shocks from Day 10 through Day 16 of pregnancy. Group II females were given the same amount of inescapable shock. Control subjects were placed in the shock apparatus for an equivalent amount of …

The Effect Of Tobacco Mosaic Virus Infection On The Activity Of Ribulose-1,5-Diphosphate Carboxylase From Three Varieties Of Lycopersicon Esculentum Miller, Yu-Sun-Kitty Chang

Theses and Dissertations

Control and TMV-infected leaf tissues of three varieties of tomatoes, Marglobe, Moscow and Delicious, were analyzed for Ribulose Diphosphate Carboxylase (RuDPCase). The specific activity of RuDPCase based on protein concentration determined by peak area obtained with the Model E Ultracentrifuge, specific activity of RuDPCase based on protein concentration determined by Lowry's method, total amount of RuDPCase per gram fresh weight, total protein of plant leaves, total chlorophyll, and ratio of Chlorophyll a to Chlorophyll b were determined. Tobacco Mosaic Virus (TMV) infection resulted in an increase in specific activity of RuDPCase and the amount of total protein (at 2 days …

I. An Isothermal Titration Microcalorimeter. Ii. Importance Of Micronutrients In Nutrition. Iii. Zinc Bibliography, John Willard Gardner

Theses and Dissertations

I. An isothermal titration microcalorimeter having a colume of 4 ml and capable of temerature control to ±2 x 10-5°C is described. Major components include a constant temperature water bath controlled to ±3 x 10-4°C, a platinum reation vessel, and an isothermal control circuit consisting of constant Peltier thermoelectric cooling and variable Joule heating controlled by a thermistor in an AC Wheatstone bridge circuit. The calorimeter was tested by measuring the heat of ionization of water and was found to produce data accurate to ± 0.1% where small samples are used such as in the investigation of many biological systems.

Fate And Metabolism Of Bas 290-H In A Model Ecosystem, Kuo-Mei Chang

Theses and Dissertations

The use of chemicals to control economic pests has grown in this century both in the amount and the diversity of materials used (Headley and Lewis, 1967). About ten billion pounds of pesticides have been used in the United States since 1945. It is estimated that there are 340 million acres of cultivated lands in the Continental United States. Of this amount, approximately 119 million acres were sprayed with herbicides, 97 million acres were treated with insecticides and 25 million acres were treated with fungicides and other minor pesticides (Matsumura, 1972).

The Effects Of Thiamin Deficiency And Thiamin Antagonists On Cardiac Function In The Rat, D. James B. Sutherland

Theses and Dissertations

A study was made to determine what biochemical changes were involved in the slowing of the rat heart rate during thiamin deprivation, pyrithiamin or oxythiamin treatment. The appearance of bradycardia during progressive thiamin deficiency was shown to be related to the reduction in myocardial enzymatic activity of pyruvate (PDH) and 2-ketoglutarate (2-KGDH) dehydrogenase, and not due to inanition alone since pair-fed control rats did not show bradycardia until the agonal stage. Bradycardia was not the result of reduced energy since CP, ATP, ADP, and AMP levels remained normal even though PDH and 2-KGDH activity dropped to 20% of normal by …

Reproduction And Development Of Ferrissia Rivularis (Say) (Basommatophora: Ancylidae) And The Effects Of Maleic Hydrazide On Its Development And Fecundity, Yuan-Hsu Kang

Theses and Dissertations

Ferrissia rivularis was selected for research because of its local accessibility and because essentially nothing was known of its reproduction and development. Reproductive and developmental biology is first described herein from the natural environment. This is then compared with the effects created by experimental exposure to a selected herbicide, maleic hydrazide, which might be a potential threat to certain invertebrates in the natural environment.

The Purification And Characterization Of Cytochrome B₅ From Porcine Kidney, M. Dean Klingler

Theses and Dissertations

A soluble form of cytochrome b_5, with a 413/280 nm ratio of nearly unity, has been isolated and purified from porcine kidney using fractional precipitation, ion exchange resins, and gel filtration procedures. The cytochrome b_5 shows heat stability up to 50° and is stable in the pH range 6.0 to 8.5. The oxidized protein exhibits an absorption maximum at 413 nm, while the reduced form shows three peaks: 423, 526, 556 nm. Molecular weight determinations have given variable results, suggesting the possibility of a polymer composed of four and eight units of a 13,500 molecular weight protomer. This study has …

The Determination Of Thiamin And Its Derivatives In Brain Tissue Of Control, Thiamin-Deficient, Oxythiamin- And Pyrithiamin-Treated Rats, David S. Murdock

Theses and Dissertations

The determination of total thiamin, free thiamin, thiamin di phosphate (TDP) plus thiamin triphosphate (TTP), and total α- hydroxyethylthiamin (HET) levels in rat brain in control, deficient, oxythiamin- (OTH) and pyrithiamin- (PTH) treated rats was accomplished. It was found that the TDP + TTP/thiamin ratio observed in the thiamin-deficient, OTH- and PTH-treated rats was constant and did not differ from the ratio observed in the control rat brains. The brain levels of TDP + TTP decreased to 39% and 12% of the control thiamin levels in deficient and PTH-treated rats respectively. The brain HET and TDP + TTP levels of …

A Proposed Mechanism Of Action For In Vitro Excystation Of Two Species Of Coccidia, William Ronald Jolley

Theses and Dissertations

Excystation of coccidian oocysts is accomplished in vitro by altering wall permeability with CO2 and a reducing agent, then activating the enclosed sporozoites with a solution of trypsin and bile. Elucidation of the mechanism of action of the CO2-reducing agent treatment was the basic intent of this study. Oocysts of Eimeria stiedae (rabbit) and E. tenella (chicken) were tested for the presence of an excystation-associated enzyme by incubating sporulated oocysts in fluids extracted from variously treated oocysts, and by carbon-14 labelling; the effect of CO2 -reducing agent treatment on oocyst walls was investigated by titration with acid or base for …

The Effect Of Ethanol Ingestion On Liver Microsomal Phosphatidyl Choline Biosynthesis., David Nelson Skurdal

Theses and Dissertations

No abstract provided.

Part I: Silver Complexes As Adsorbents In Gas-Solid Chromatography. Part Ii: The Attempted Analysis Of Sulfa Drugs By Gas Chromatography., Samuel Harold Givand

Theses and Dissertations

No abstract provided.

An Analysis Of The Personal Economic Knowledge Of North Dakota High School Juniors And Seniors., Richard L. Hilde

Theses and Dissertations

No abstract provided.

Pattern Of Watershed Enrichment And Its Effects On Nutrient Budgets And Weed Growth In A Culturally Eutrophied Lake, Stanley James Miekicki

Theses and Dissertations

No abstract provided.

Photochemistry Of Bilirubin, Donella M. O'Neill

Theses and Dissertations

No abstract provided.

Report On The Conduction Of An Informal Adult Discussion Series In Conjunction With Children's Storyhour At The Grand Forks Public Library, Janet L. Berg

Theses and Dissertations

No abstract provided.

Effects Of Ethanol On Amino Acid Absorption By The Rat Small Intestine, Craig B. Fabel

Theses and Dissertations

No abstract provided.

Effect Of Ethanol On Phospholipid Metabolism, R W. Bryan

Theses and Dissertations

No abstract provided.

Some Ecologic Relationships In An Anaerobic-Aerobic Experimental Waste Treatment System., Gordon M. Fillipi

Theses and Dissertations

No abstract provided.

The Effects Of Different Gases On Excystation Of Coccidian Oocysts, James B. Jensen

Theses and Dissertations

Excystation of coccidian oocysts is a diphasic process where CO2 and suitable reducing agents cause changes in oocyst wall permeability (phase I) allowing the entrance of trypsin and bile which activate the sporozoites (phase II). This project was an indirect study of the mechanism of CO2 action by the substitution of NO, NO2, N2O, H2S, SO2 , CH4, NH3 and 8M urea in place of CO2. Changes in oocyst wall permeability of Eimeria stiedae, E. bovis and E. tenella were determined by incubation with the reagents and cysteine HCl followed by treatment with trypsin and bile to initiate activation of …

A Career Curriculum In Physical Education For Grade Five, Alicia C. Vorland

Theses and Dissertations

No abstract provided.

Bionomics And The Influence Of Diet Upon The Maturation Of Orchopeas Leucopus (Baker), Lynden Phillip Baum

Theses and Dissertations

Knowledge of the bionomics of plague vectors, es-pecially factors which influence life history, host pre-ference, and fluctuations of flea populations, are basic to an understanding of plague ecology. Orchopeas leucopus (Baker), an ectoparasite of cricetid rodents such as Peromyscus maniculatus (Wagner), and Peromyscus truei (Baird), is a vector of plague in the western United States (Holdenried and Morlan, 1955). In a study of nine biotic corrnnunities in the Utah portion of the Great Basin, P. maniculatus was the most abundant rodent in seven of the biotic corrnnunities (Olsen, 1966). Because of the ubiquitous nature of P. maniculatus an interchange of …

Population Dynamics Of Fleas (Siphonaptera) On The Uinta Ground Squirrel, Spermophilus Armatus Kennicott, Dennis I. Anderson

Theses and Dissertations

The Uninta ground squirrel, Spermophilus armatus Kennicott, is the most abundant diurnal rodent in the Wasatch Mountains at the 7,000-9,000 foot level particularly in the campgrounds and picnic areas. Contact between man and the Uninta ground squirrel may be hazardous inasmuch as the causative agent of plague has been isolated from S. armatus and its flea parasites (Public Health Reports, 1937, 1938a, 1938b; Meyer, 1938; Byington, 1940; Allred, 1951; and Beck, 1955). Since these fleas are vectors of sylvatic plague and potential vectors of human plague, detailed knowledge about their population dynamics is desirable.

The Distribution Of Meyenia Fluviatilis At Lincoln Beach Area Of Utah Lake With Notes On Seasonal Occurrence Of Gemmules, Chadwick E. Smith

Theses and Dissertations

This study of the distribution of the fresh-water sponge, Meyenia fluviatilis, at the Lincoln Beach area of Utah Lake involved the following: First, sampling of the area for the presence or absence of the species. Second, sampling at two separate areas at different depth intervals to determine if the number of sponge colonies and colony size were in any way related to depth. Finally, monthly sampling at one area to determine when gemmules of M. fluviatilis were present in the sponge colonies. Meyenia fluviatilis was found to be commonly distributed in 1-2 m of water on the lower surface of …