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Articles 19351 - 19380 of 19581
Full-Text Articles in Entire DC Network
The Bromination Of 1,1,1-Ethanetriacetic Acid, John A. Gurney
The Bromination Of 1,1,1-Ethanetriacetic Acid, John A. Gurney
Theses and Dissertations
Essential to the entire field of Organic Chemistry is the nature of the carbon to carbon bond. Our current concepts and guiding principles concerning it are almost solely constructed from aliphatic compounds, certain simple ring species, and aromatic systems. Except for special cases, aliphatic and aromatic types are felt to be mildly strained or free from internal tension while the alicylic small and medium ring compounds are the so-called strained molecules. These strained compounds involve bending back or compression of two of the four carbon bonds from an equilibrium position. Distortions of more complex origin occur in the paracyclophanes and …
A Morphological Study Of The Subtribe Ithypori (Coleoptera: Curculionidae), Leslie J. Boothe
A Morphological Study Of The Subtribe Ithypori (Coleoptera: Curculionidae), Leslie J. Boothe
Theses and Dissertations
This is a morphological study of the subtrib!a Itb:ypori, undertaken to discover all that we can about the morphology and if possible justify the present classification. It includes four genera and fifteen identified species.
A Follow-Up Study Of The Graduated Of Bemidji State Colleges With Majors In Business Education For The Years 1953-1957, Donald C. Swedmark
A Follow-Up Study Of The Graduated Of Bemidji State Colleges With Majors In Business Education For The Years 1953-1957, Donald C. Swedmark
Theses and Dissertations
No abstract provided.
A Study Of Three Photochemical Activities Of Chloroplasts, Jimmy W. Hinkson
A Study Of Three Photochemical Activities Of Chloroplasts, Jimmy W. Hinkson
Theses and Dissertations
Chloroplasts of sugar beet leaves were subjected to treatment by heating, by incubation at pH 8.5 and pH 5.5, by incubation in ion low water, by sonic oscillation, by digestion with enzymes (lysozyme, pancreatin, and lipase), by extraction with digitonin, and by chemical compounds including 8-hydroxy-quinoline, sodium azide, zinc sulfate, phenyl mercuric acetate, potassium cyanide, 1-allylthiourea, 2,4-dinitrophenol, thymol, and p-chloromercuribenzoate. A comparative study was made of the effects of these treatments upon three photochemical reactions (the photoreduction of 2,6- dichlorophenol indophenol, the photoreduction of indigo carmine in the presence of a couple composed of 2,6-dichlorophenol indophenol and ascorbic acid, and …
Sulfur Metabolism In Toxic And Nutritional Hepatic Injury : Pt. I. Chemically Induced Necrotic Liver Degeneration ; Pt. Ii. Fatty Liver Degeneration, Fred L. Snyder
Theses and Dissertations
No abstract provided.
A Comparison Of The Health Knowledge And Health Interests Of University Of North Dakota Freshmen, Patricia Ann Warcup
A Comparison Of The Health Knowledge And Health Interests Of University Of North Dakota Freshmen, Patricia Ann Warcup
Theses and Dissertations
No abstract provided.
A Comparison Of Achievement Of Freshman Students In The Thief River Falls High School, Kermit L. Eastman
A Comparison Of Achievement Of Freshman Students In The Thief River Falls High School, Kermit L. Eastman
Theses and Dissertations
No abstract provided.
Requirements For The Bachelor's Degree For Men Students Majoring In Physical Education In The Northwest And Northcentral Sections Of The United States, Alvin E. Siegle
Requirements For The Bachelor's Degree For Men Students Majoring In Physical Education In The Northwest And Northcentral Sections Of The United States, Alvin E. Siegle
Theses and Dissertations
No abstract provided.
The Establishment And Implementation Of Guiding Principles For Motivation In Teaching Typewriting, Frank S. Strle
The Establishment And Implementation Of Guiding Principles For Motivation In Teaching Typewriting, Frank S. Strle
Theses and Dissertations
No abstract provided.
Blood Sugar Responses Of Dogs At Various Ages To Cold, Epinephrine, And Norepinephrine, Alvin L. Larson
Blood Sugar Responses Of Dogs At Various Ages To Cold, Epinephrine, And Norepinephrine, Alvin L. Larson
Theses and Dissertations
No abstract provided.
Effects Of Pyridoxine On Absorption From The Small Intestine Of The Rat, Lyle J. Coen
Effects Of Pyridoxine On Absorption From The Small Intestine Of The Rat, Lyle J. Coen
Theses and Dissertations
No abstract provided.
Physical Education In The Crookston Public School System, Linton R. Lehrer
Physical Education In The Crookston Public School System, Linton R. Lehrer
Theses and Dissertations
No abstract provided.
Studies On The Periodicity Of Certain Plankton Species Of Salem Lake, Gene A. Pratt
Studies On The Periodicity Of Certain Plankton Species Of Salem Lake, Gene A. Pratt
Theses and Dissertations
Plankton samples were taken periodically from one station in Salem Lake from the fall of 1955 through the winter of 1957. Other data including the pH, dissolved oxygen content, turbidity, brightness of day, temperature, and time of day were recorded at the time of each collection. The plankton samples were centrifuged and preserved in a 4% formalin solution. They were later examined microscopically, and density, percent density, and percent frequency calculations were made from them for ten selected species and for the five phyla which they represent.
Chemosynthetic Microorganisms In Leaching Sulfide Minerals, A. Keith Jameson
Chemosynthetic Microorganisms In Leaching Sulfide Minerals, A. Keith Jameson
Theses and Dissertations
This investigation showed that a single bacterium was capable of sulfide oxidation in exposed ore bodies. This single bacterium was isolated and characterized. It exhibited different characteristics than any previously known organism. It was found to be a chemosynthetic autotroph. An optimum nutrient concentration was determined for pyrite oxidation. The nutrient concentration was determined for pyrite oxidation. The nutrient contains only a source of phosphate and nitrogen. Urea was found to be a better source of nitrogen than ammonium sulfate which had previously been used. The effect of various organic compounds on the oxidation of pyrite was observed. Glucose and …
A Morphological Study Of Some North American Sitona (Coleoptera: Curculionidae), George J. Kidd
A Morphological Study Of Some North American Sitona (Coleoptera: Curculionidae), George J. Kidd
Theses and Dissertations
This study was undertaken to identify, if possible, some morphological characteristics of the U. S. Sitona species that would help simplify the classification of this difficult group. Because of extreme difficulty in obtaining positively identified specimens of all species reported, the scope was limited to eight identified species and one unidentified series. External structures studied include mouth parts, appendages, eyes, wings, and genitalia. The spermathecae were the only internal structures analyzed. Mandibular profiles were compared throughout the species represented and variations were noted. Labia and maxillae were observed but no distinctive differences were noticed. Antennae were found to be quite …
Oviposition Habits Of The Tick Dermacentor Parumapertus Neumann And Factors Influencing Egg Development, Clive D. Jorgensen
Oviposition Habits Of The Tick Dermacentor Parumapertus Neumann And Factors Influencing Egg Development, Clive D. Jorgensen
Theses and Dissertations
This paper includes data concerning the influence of relative humidity, temperature, and percentage of engorgement on the pre-oviposition period, oviposition period, post-oviposition period, and incubation period of the tick Dermacentor parumapertus Neumann. The influence of the percentage of engorgement on the oviposition period, oviposition rate, and egg number is considered. Data on the disposition and number of eggs in nature are discussed.
A Study To Determine The Ten Most Serious Problems Of Lds Seminary Students, And What The Seminary Is Doing To Help Students With These Problems, Ortho Christensen
A Study To Determine The Ten Most Serious Problems Of Lds Seminary Students, And What The Seminary Is Doing To Help Students With These Problems, Ortho Christensen
Theses and Dissertations
It was the purpose of this study to determine the ten most serious problems of L.D.S. Seminary students, and what the seminaries are doing to help students meet these problems.
Relationship Between The Study Of Geometry And Reading Ability, William J. Forseth
Relationship Between The Study Of Geometry And Reading Ability, William J. Forseth
Theses and Dissertations
No abstract provided.
A Comparative Study Of Business Teacher Education In The State Supported Institutions Of Higher Education In North Dakota, South Dakota, And Montana, Marvin K. Devig
A Comparative Study Of Business Teacher Education In The State Supported Institutions Of Higher Education In North Dakota, South Dakota, And Montana, Marvin K. Devig
Theses and Dissertations
No abstract provided.
The Effect Of Four Methods Of Teaching An Orientation Course On Problem Check List Responses, Donovan J. Allen
The Effect Of Four Methods Of Teaching An Orientation Course On Problem Check List Responses, Donovan J. Allen
Theses and Dissertations
No abstract provided.
Electricity For Industrial Arts, Frank R. Steckel
Electricity For Industrial Arts, Frank R. Steckel
Theses and Dissertations
No abstract provided.
An Analysis Of The Objectivity-Imperative And Related Problems In Sociological Methodology And Interpretation, Robert M. White
An Analysis Of The Objectivity-Imperative And Related Problems In Sociological Methodology And Interpretation, Robert M. White
Theses and Dissertations
No abstract provided.
Metabolic Changes In Newborn Dogs During Development Of Temperature Regulation, Donald G. Mcintyre
Metabolic Changes In Newborn Dogs During Development Of Temperature Regulation, Donald G. Mcintyre
Theses and Dissertations
No abstract provided.
Phosphorus Metabolism Of C3h Ascites Tumor Cells, George Miroff
Phosphorus Metabolism Of C3h Ascites Tumor Cells, George Miroff
Theses and Dissertations
No abstract provided.
Redistribution And Incorporation Of Sulfur-Containing Amino Acids During The Healing Of Experimental Wounds, Robert C. Nordlie
Redistribution And Incorporation Of Sulfur-Containing Amino Acids During The Healing Of Experimental Wounds, Robert C. Nordlie
Theses and Dissertations
No abstract provided.
The Effect Of Radioactive Phosphorus On Poliomyelitis Virus Type I (Mahoney Strain), George E. Kenny
The Effect Of Radioactive Phosphorus On Poliomyelitis Virus Type I (Mahoney Strain), George E. Kenny
Theses and Dissertations
No abstract provided.
Oxidation Of Molybdenite With The Aid Of Microorganisms, Ralph Anderson
Oxidation Of Molybdenite With The Aid Of Microorganisms, Ralph Anderson
Theses and Dissertations
This work represents a study on the biological oxidation of molybdenite, MoS2. The principal objective of this study was to investigate the possibility of the biological oxidation of molybdenite, to determine the physical and chemical conditions under which the oxidative process occurs, and to develop a strain of bacteria or alter the activity of the microorganisms by acclimatization to increase their activity on sulfide minerals, in particular molybdenite. Minerals used in this study were pyrite (FeS2), chalcopyrite (CuFeS2), molybdenite concentrate, and molybdenite ore. The microorganisms used in this investigation were autotrophic bacteria obtained from the leaching streams of Bingham Canyon, …
A Preliminary Investigation Of The Taxonomy And The Geographical Distribution Of The Chrysopidae (Neuroptera) Of Utah, Wayne A. Melander
A Preliminary Investigation Of The Taxonomy And The Geographical Distribution Of The Chrysopidae (Neuroptera) Of Utah, Wayne A. Melander
Theses and Dissertations
The writer undertook a preliminary investigation of the taxonomy and geographic distribution of a group of neuropterous insects, the Chrysopidae, in Utah. The main purposes of the investigation were to find what species and forms of these beneficial insects occur in Utah, to provide means for their identification, and to report upon their geographical distribution. Two main methods of investigation were employed. The first, a bibliographic method, was to carefully review the literature concerning the Chrysopidae of the United States for all references pertaining to their distribution and their taxonomy. The second method of investigation was to study insect specimens …
A Study Of The Hydra Of Salem Pond, Mary Elizabeth Dumas
A Study Of The Hydra Of Salem Pond, Mary Elizabeth Dumas
Theses and Dissertations
The site of investigation for this work was Salem Pond, Salem (formerly known a.s Pond Town), Utah. It was settled in 1851 by David Crockett and David Fairbanks. Colonization began in 1856 when a fort of adobe and lumber houses was built near the pond, and later, several industries located there, benefited by the water wheels constructed by the pioneers (Huf4 l947).
Photo-Oxidations Sensitized By Physiologically Important Substances, Ernel D. Ihnen
Photo-Oxidations Sensitized By Physiologically Important Substances, Ernel D. Ihnen
Theses and Dissertations
A study of the photo-oxidation of the 2,6-dichlorophenol indophenol-ascorbic couple was undertaken with a view to investigating the postulated mechanism of oxidation by a component of the oxygen evolving sequence operative in photosynthesis. A spectrophotometric method for the measurement of the progress of photo-oxidation was developed. Temperature and pH dependence were determined and the effect of various common inhibitors and physiological substances tested. None of the common Hill reaction inhibitors were effective in the ascorbic acid photo-oxidation in the system used. KCN and catalase as well as a few other high molecular weight proteins were able to inhibit dark auto-oxidation …