Digital Commons Network^™

Asexual Reproduction In Planaria Studies On Inhibition, Hal R. Fitzgerald

Theses and Dissertations

The invertebrates display several methods of asexual reproduction, such as fission and gemnule formation and budding (Hay, 1966). Planaria reproduce asexually only by fission.

Preparation Of New Amino-, Thio-, And Sulfonyladamantane Derivatives, Joseph Craig Argyle

Theses and Dissertations

Various synthetic schemes were used to prepare a number of new amino-thio- and sulfonyladamantane compounds. By a nucleophilic substitution on 1-bromoadamantane, 1-(p-nitrophenylthio)adamantane was prepared from p-nitrothiophenol; the amino- and sulfonyl- derivatives of this compound were also prepared. Silver tosylate was used to generate the 1-adamantyl carbonium ion from 1-bromoadamantane in a synthetically useful procedure for preparing 1-adamantylamides from nitriles. Three 1-(1-adamantylcarbinyl)-2,5-dialkylpyrroles were prepared by Knorr-Paal reactions and reduced to the corresponding pyrrolidines. Thio- and aminomethyl 1-adamantyl ketones were prepared from methyl and bromomethyl 1-adamantyl ketones, respectively. Aliphatic and aromatic oxiranes were reacted with 1-aminoadamantane in a bomb at elevated temperatures …

Calorigenic Effects Of Thyroxine And Triiodothyronine On Rat Diaphragm., Robert Lee Chambers

Theses and Dissertations

Since the isolation of triiodothyronine (T3) by Pitt-Rivers and Gross (1953) several questions as to its role as a thyroid hormone arose. Does T3 have the same or different actions than that of thyroxine (T4 )? Is T3 an emergency hormone, since its synthesis relative to T4 is greatly increased during periods of low iodine intake and its response time is I/5th that of T4 (Ackerman and Arons, 1958)? Are there any interactions modifying their respective actions?

The Synthesis And Properties Of New Potentially Chemotheraputic [Sic] Pteridine Derivatives, Walter Wesley Parish

Theses and Dissertations

A new general synthetic method for the preparation of 6-thiopteridines has been developed. The method involves the addition of thiols to intermediate pyrimidine nitrones formed in situ by the reaction of 4-amino-5-nitrosopyrimidines with pyridinium-activated acetonitriles, acetates, acetophenones, and other methylketones. Ca. forty new pteridines were prepared by this method. The preparation of six new 6-pteridinyl ketones, two new 6- pteridinyl ketone thiosemicarbazones, and two new 6-sulfonylpteridines and their 4-acetamido derivatives is also reported. 4-Acetamido-2- amino-7-phenylpteridine 5-oxide was prepared by the reaction of 2- amino-4,6-diacetamido-5-nitrosopyrimidine with either phenylsulfonyl-acetophenone or phenacylpyridinium bromide. Evidence relating to the structure of the acylated 4-amino-5- nitrosopyrimidines …

A Survey Of The Helminth Parasites And Coccidia Of Cattle And Sheep In Utah Valley, Joseph Carl Fox

Theses and Dissertations

A survey of gastro-intestinal parasites in cattle and sheep in Utah Valley was conducted. Cattle in the valley were not seriously parasitized by helminths, whereas sheep usually had heavy helminth infections. Ten genera of helminths and 8 species of coccidia were identified in cattle in the valley, and 14 genera of helminths and 8 species of coccidia were identified in sheep. In conjunction with the survey, meteorologic studies were conducted May through September, 1909, to ascertain the effects which irrigation had upon micro-environments on grass pastures in relation to the development of free-Iiving stages of gastro-intestinal nematodes of ruminants. The …

Taxonomy And Ecology Of Fungi Imperfecti From Four Locations In Utah Lake, Utah Co., Utah, Laird Max Hartman

Theses and Dissertations

Fungi imperfecti were cultured from water and bottom sediment samples collected at four locations of Utah Lake. These study sites included: (a) The mouth of Provo River, the largest fresh-water tributary entering Utah Lake, (b) Mud Lake, a large shallow area known for its high nitrogen content, (c) the entrance of the Spanish Fork River into the lake, a large fresh-water tributary containing wastes from industry and agricultural enterprises, (d) Jordan River, the only natural outlet of Utah Lake. One hundred and thirty-eight species of fungi imperfecti were identified. A total of 89 species were isolated from the Spanish Fork …

Changes With Growth In Selected Body Proportions Of The Woundfin Minnow (Plagopterus Argentissimus Cope: Cyprinidae), Edward James Peters

Theses and Dissertations

In this study 883 specimens of the woundfin minnow (Plagopterus argentissimus Cope) from the Virgin River in Utah, were weighed and measured. Ratios of body measurements to standard length, and gonad weight to total weight were calculated. From the gonad weight:total weight ratios it was determined that woundfins spawn during a period from April through June, and that the first significant gonad development is during the third year of life. Several body proportions such as, snout length, gape, upper jaw length and peduncle depth grew nearly isometrically. Growth of other body proportions was more or less allometric. Head length, body …

Ecological Factors Affecting Lateral Distribution Of Goldeye Hiodon Alosoides (Rafinesque), In The Little Missouri Arm, Lake Sakakawea, North Dakota, Stanley I. Johannes

Theses and Dissertations

The lateral distribution of goldeye, Hiodon alosoides (Rafinesque) in Little Missouri Arm, Lake Sakakawea, North Dakota, was investigated during 1967 and 1968. This species, which is of commercial importance in Canada, is present in great abundance in Lake Sakakawea, yet is not commercially exploited in that body of water.

Experimental gill nets were fished from the surface at eight locations along the Little Missouri Arm to detect differences in goldeye populations along the length of the arm. A total of 7,191 fish were taken of which 6,536 or 90.80% were goldeye. Mesh selectivity data was recorded; 1 1/4 inch mesh …

A Study Of The Fine Structure Of Perinotochordal Microfibrils In Normal And Enzyme-Treated Chick Embryos., Richard G. Frederickson

Theses and Dissertations

No abstract provided.

The Biological Regulation Of Copper Homeostasis In The Rat., Gary William Evans

Theses and Dissertations

No abstract provided.

Investigations Of The Use Of Gonadotropins To Induce Spawning In The White Sucker Catostomus Commersoni (LacéPèDe), Shih-Kuo Tao

Theses and Dissertations

No abstract provided.

Biotin Production And Utilization In Certain Natural Environments, Gordon M. Fillipi

Theses and Dissertations

No abstract provided.

The Influence Of Family Culture On School Related Interests And Activities On 9th-12th Graders In An Urban Community : A Replication, James R. Reynolds

Theses and Dissertations

No abstract provided.

The Fine Structure Of The Subarachnoid Angle And A Lateral Recess Of The Subarachnoid Space, William A. Himango

Theses and Dissertations

No abstract provided.

Thermal Regulatory And Cardiorespiratory Responses In The Rat Exposed To Controlled Hyperbaric Environment, Larry Stetzner

Theses and Dissertations

No abstract provided.

Enzymes Involved In Gluconeogenesis In Rabbit Liver, Kathleen A. Ebert

Theses and Dissertations

No abstract provided.

The Ultrastructure Of Intranuclear Annulate Lamellae In The Giant Cells Of The Albino Mouse Chorioallantoic Placenta, Robert S. Pope

Theses and Dissertations

No abstract provided.

Fleas From Citellus Tridecemlineatus And Their East-West Distribution In North Dakota, Robert F. Kinzel

Theses and Dissertations

No abstract provided.

The Action Of Alcohol On The Peripheral Nervous System As Determined By Changes In The Electroencephalogram, Ronald A. Szymankowski

Theses and Dissertations

No abstract provided.

The Fine Structure Associated With Developing Cartilage In The Perinotochordal Area Of The Chick Embryo, Mark D. Olson

Theses and Dissertations

No abstract provided.

The Development Of A Unit On Business Ethics For A Secretarial Arts Program, Joan E. Hedley

Theses and Dissertations

No abstract provided.

Seasonal And Daily Food Habits Of Goldeye, Hidon Alosides (Rafinewque), In The Little Missouri Arm Of Lake Sakakawea, North Dakota, Bernard Lee Evenhuis

Theses and Dissertations

No abstract provided.

Avian Reticuloendotheliosis Virus (Strain T): Characterization Of The Virus In The Vertebrate Host And Certain Hematophagous Arthropods., Kenneth David Thompson

Theses and Dissertations

No abstract provided.

Paleoenvironmental Reconstruction Of Late Quaternary Lacustrine Sediments (Seibold Site) In Southeastern North Dakota, William B. Bickley Jr.

Theses and Dissertations

The Seibold Site on the Missouri Coteau in northwest Stutsman County, North Dakota, contains a late Quaternary lacustrine deposit with a spectaculary preserved and diverse biota; more than 150 species occur, of which the mollusks and fish are figured and discussed in detail in this study. The stratigraphic sequence, in ascending order, is a follows: 1) pebbly silt; 2) clayey silt; 3) organic mud; 4) calcareous mud; 5) sandy silt and clay; 6) silty sand; and 7) sandy silt and clay.

The stratigraphic sequence and biota suggest a 5-phase history for the area during the last 11,000 years. During phase …

Photochemistry Of Quinine And Related Systems, Enrique F. Travecedo

Theses and Dissertations

No abstract provided.

Educational Needs As Expressed By Seniors, Their Parents And Educators Innortheastern North Dakota., Gerald Patrick Norberg

Theses and Dissertations

No abstract provided.

Life Histories, Productivity, And Energy Relationships Of Midge Populations In A Highly Mineralized Northern Prairie Lake., James D. Knauss

Theses and Dissertations

No abstract provided.

Studies On The Morphology And Chemistry Of The Swelling Process In Rat Liver Mitochondria., Duane R. Myron

Theses and Dissertations

No abstract provided.

Biological Sciences Curriculum Study Guidelines And Selected Practices Inthe Biology Methods Courses Of Minnesota State Colleges., Donald Frederick Darling

Theses and Dissertations

No abstract provided.

Physiological And Kinetic Factors Affecting The Transport And Accumulation Of Pantothenic Acid Into Non-Proliferating Cells Of Lactobacillus Plantarum., Ralph Joseph Germinario

Theses and Dissertations

No abstract provided.