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Articles 11581 - 11610 of 13539
Full-Text Articles in Entire DC Network
Data Processing Methodolgies, U.S. International Biological Program
Data Processing Methodolgies, U.S. International Biological Program
Modeling
No abstract provided.
Draft Proposal For 1974-76 And Review Of Scientific Accomplishment, U.S. International Biological Program
Draft Proposal For 1974-76 And Review Of Scientific Accomplishment, U.S. International Biological Program
Proposals
No abstract provided.
Proposal For 1974-76, U.S. International Biological Program
Proposal For 1974-76, U.S. International Biological Program
Proposals
No abstract provided.
Protection Of Our Fragile Upper Atmosphere, Clayton Clark
Protection Of Our Fragile Upper Atmosphere, Clayton Clark
Faculty Honor Lectures
Termination of U.S. government support for the Supersonic Transport, SST, may eventually cost the United States its leadership in aviation and billions of dollars in international trade losses, yet if the world wide SST program is allowed to continue, the costs to mankind as a result of damage to environmental resources could be much higher. The decision to terminate the project was heavily based upon concern for possible changes in the properties of the upper atmosphere as a result of SST operations in that realm, with consequent danger to plant and animal life on the Earth below. Briefly, the concern …
Community Characteristics Of Six Bundred Aspen- Conifer Sites And Their Related Animal Use, L.H. Kleinman
Community Characteristics Of Six Bundred Aspen- Conifer Sites And Their Related Animal Use, L.H. Kleinman
Aspen Bibliography
No abstract provided.
Effect Of Increased Water Supply On Net Returns To Dairy Farms In Sonsonate, El Salvador, Morris Whitaker, Gary Glenn, Allen Lebaron, Boyd Wennergren
Effect Of Increased Water Supply On Net Returns To Dairy Farms In Sonsonate, El Salvador, Morris Whitaker, Gary Glenn, Allen Lebaron, Boyd Wennergren
Reports
No abstract provided.
Effects Of Temperature On The Toxicity To The Aquatic Biota Of Waste Discharges - A Compilation Of The Literature, E. Joe Middlebrooks, M. J. Gaspar, R. D. Gaspar, J. H. Reynolds, Donald B. Porcella
Effects Of Temperature On The Toxicity To The Aquatic Biota Of Waste Discharges - A Compilation Of The Literature, E. Joe Middlebrooks, M. J. Gaspar, R. D. Gaspar, J. H. Reynolds, Donald B. Porcella
Reports
An extensive compiliation and general evaluation of the literature is presented which describes the temperature interaction with toxicity. Recent literature is summarized and made accessible along with a few generalized relationships such that researchers may design studies in a manner that will increase the utility of their results. A detailed indexing system is employed which makes the information contained in the report accessible by author, toxicant, and text organism. Summary tables of the most pertinent literature are also presented for easy subject retrieval. It was concluded that very little uniformity in experimental design is found between experiments on temperature-toxicity relationships, …
Ecological Implications Of Dimethyl Mercury In An Aquatic Food Chain, Lawrence P. Kolb, Donald B. Porcella, E. Joe Middlebrooks
Ecological Implications Of Dimethyl Mercury In An Aquatic Food Chain, Lawrence P. Kolb, Donald B. Porcella, E. Joe Middlebrooks
Reports
Laboratory studies indicate dimethyl mercury may be a major product of microbial methylation of inorganic mercury. Although another methylation product, monomethyl mercury, has been extensively studied, the physical, chemical, and biologicl factors affecting the transport and food chain distribution of dimethyl mercury have remained unclear. This report presents results of laboratory studies of volatilization rates from water as a function of temperature and mixing conditions, uptake kinetics and equilibrium concentrations in algae,
The French Influence On Eighteenth - Century English Literature, Linda Jane Grow
The French Influence On Eighteenth - Century English Literature, Linda Jane Grow
Undergraduate Honors Capstone Projects
The development of English literature in the eighteenth century was strongly influenced by France and French writers. Lately there has been an attempt to belittle the French influences. It is true that in the past the Gallic influence has been exaggerated, but it really cannot be overlooked.
Historically it is true to treat England and France as one country in respect to their literary activity between the middle of the seventeenth and eighteenth centuries. Roughly, there were about 100 years, between the execution of Charles I in 1649 and the execution of Louis XIV in 1793, during which there was …
Utopia..., David A. Griffith
Utopia..., David A. Griffith
Undergraduate Honors Capstone Projects
This short story is an attempt to dramatize human relations as the crux of Utopianism. Its science fiction setting has been deemphasized in order to keep distraction at a minimum. The House described in the story may be taken as a symbol of the phalanx - the physical structure - associated with Utopias. The story's focus, however, is on the importance and vulnerability of interpersonal communication in Utopia.
Social, Economic, Environmental, And Technical Factors Influencing Water Reuse, A. Bruce Bishop, Suravuth Pratishthananda, John Keith, Craig Colton, A. Berry Crawford
Social, Economic, Environmental, And Technical Factors Influencing Water Reuse, A. Bruce Bishop, Suravuth Pratishthananda, John Keith, Craig Colton, A. Berry Crawford
Reports
A growing population together with rising per capita income has resulted in increased demand for water for virtually all uses. At the same time there has been increased public concern for maintaining the quality of streams for recreation, sight-seeing, and other social uses, and to conserve environmental values. A partial answer to these conflicts in water use and management is more extensive waste water reclamation and reuse. Heretofore, water salvage and reuse has been mainly practiced in specific operational cases, such as recycling industrial process water, or on an ad hoc basis, such as a series of diversions and subsequent …
The Demand For Agricultural Water In Utah, Mark H. Anderson, Jay C. Andersen, John E. Keith, Calvin G. Clyde
The Demand For Agricultural Water In Utah, Mark H. Anderson, Jay C. Andersen, John E. Keith, Calvin G. Clyde
Reports
Water is recognized as an essential element in Utah's agricultural economy. It is the subject of much controvery and litigation and yet most discussion of the subject is based on opinions and prejudice rather than upon the basis of sound scientific evidence. This paper attempts to provide some of the economic information necessary for sound decisions in the development and use of Utah's water resources with respect to agriculture. Utah has been divided into ten drainage regions (hydrologi subregions) and the presently irrigated and potentially irrigable land according to land class were estimated for each country or portion of a …
Utah Science Vol. 33 No. 4, December 1972
Utah Science Vol. 33 No. 4, December 1972
Utah Science
Refocusing research to better serve Utah- editorial, Wynne Thorne 99
Translating agriculture into food 100
New shapes for turkey, Carroll Draper 101
Alfalfa insects research gets new dimensions 103
Modern treatments retard spoilage of fruit and produce, D. K. Salunkhe, M. T. Wu, and S. Jadhav 104
Natural hybridization among the pinyon pines, Ronald M. Lanner 109
Blood will tell, Clive W. Arave and T. A. Gillette 111
Genetic improvement of dairy cattle, R. C. lamb 113
Rural development: its dimensions and focus, Stan L. Albrecht 115
Research notes about stress 120
Pigs help answer questions about human nutrition, Deloy …
Utah Science Vol. 33 No. 3, September 1972
Utah Science Vol. 33 No. 3, September 1972
Utah Science
Utah agriculture is never static-editorial Doyle J. Matthews 71
Wildlife notes 72, 96
Getting answers from Utah's salt desert, Lois M. Cox 73
Iron deficiency- causes and consequences, Arthur Mahoney and Deloy G. Hendricks 75
New irrigation method saves water, but it's expensive, R. J. Hanks and Jack Keller 79
Water rights and zoning restrictions, Darwin B. Nielsen 83
Soils of the Wasatch valleys, LeMoyne Wilson and A. R. Southard 85
What you've wanted to know about lawns- but were afraid to ask, William F. Campbell 88
Regional climatic planning- guide for Utah, E. Arlo Richardson 91
Utah tree bulletin …
The Interaction Of Promazine With Selected Macromolecules And A Membrane Utilizing Absorption And Emission Spectroscopy, Jess D. Keeler
The Interaction Of Promazine With Selected Macromolecules And A Membrane Utilizing Absorption And Emission Spectroscopy, Jess D. Keeler
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The association of promazine-HCl with bovine serum albumin, ammonium detergent micelles, and hemoglobin-free-rabbit-erythrocyte membranes were measured using the changes in the absorption and the emission of the interactants plus the fluorescent probe 1-anilino-8-naphthalene sulfonate. The binding of a promazine to serum protein and membrane did not alter the emission of the drug. However, the binding did produce a measurable quenching of the membrane and protein fluorescence. The quenching reaction was pH sensitive for both the protein and the membrane. Promazine binding to serum protein produced a hyperchromic change in the drugs absorption spectrum which paralleled the quenching reaction. The binding …
Utah Science Vol. 33 No. 2, June 1972
Utah Science Vol. 33 No. 2, June 1972
Utah Science
Ingenuity + time = $ saved + efficient research 39
A research tool for plant scientists - the electron microscope, W. F Campbell and S. L. Kimball 40
Weed control in cities and towns, Louis A. Jensen 44
Utah's most notorious poisonous weed-controlling ,tall larkspur, E. H. Cronin 47
Native plants for gardens, Berniece A. Andersen and Arthur H. Holmgren 50
To commute - or not to commute: a new choice for farm families, B. Delworth Gardner and Larry K. Bond 53
Logan lagoons good for ducks, David E. Dodge and Jessop B. low 55
Cubed hay gives better gains, …
A Simple Microradiometric Technique For The Rapid Measurement Of Monoamine Oxidase Activity In Rat Testicular Minced And Teased-Tubular Preparations, Ronald L. Urry
Biology
Two radiometric techniques are described for the measurement of monoamine oxidase activity in testicular tissue preparations. These techniques utilize 5-HT-2-14C (serotonin) as the substrate and measure its conversion into 5-HIAA-14C (hydroxy-indole acetic acid). The first technique described uses a substrate concentration of 0.9 µM (0.05 µCi) in an incubation volume of 3.1 ml and 120 mg of teased-tubules. Samples are incubated 1 hour. This assay was found suitable for use with teased-tubule preparations but not for preparations containing interstitual cells. An inhibitor was present in the interstitual cell preparations which at the low substrate concentrations used …
Growth Of The Rabbit Coccidium, Eimeria Magna, In Cell Cultures, Clarence A. Speer
Growth Of The Rabbit Coccidium, Eimeria Magna, In Cell Cultures, Clarence A. Speer
Biology
The in vitro development of Eimeria magna was studied using various cell types and compared with corresponding development observed in the intestinal epithelial cells of rabbits at 3, 4 and 5 days after inoculation. Leighton tubes were inoculated with sporozoites and the cultures examined at various intervals after incubation with phase-contrast or interference-contrast microscopy. Mucosal scrapings from infected rabbits were also examined. Mature first- and second-generation schizonts were seen in Madin-Darby bovine kidney (MDBK) cells and epithelioid embryonic bovine liver cells, whereas no development beyond the sporozoite occurred in fibroblastic, embryonic, bovine liver cells, lamb trachea cells and aggregates of …
The Regulation Of Purine Biosynthesis In A Phosphoribosylpyrophosphate Aminotransferase-Deficient Mutant Of Salmonella Typhimurium, Wen-Cherng Tsai
The Regulation Of Purine Biosynthesis In A Phosphoribosylpyrophosphate Aminotransferase-Deficient Mutant Of Salmonella Typhimurium, Wen-Cherng Tsai
Biology
The regulation of the alternate first enzyme of purine de novo synthesis (ribose-5'-phosphate aminotransferase) has been examined in pur-F 341, a purine-requiring mutant of Salmonella typhimurium deficient in the primary first enzyme (PP-ribose-P amidotransferase, EC 2.4.2.14). The ribose-5'- phosphate aminotransferase is feed-back inhibited by AMP, ADP, GDP and adenosine but not by ATP, GTP, GMP and free adenine. Pyrimidines (except CDP and UDP) and thiamine compounds show no significant inhibitory effect on ribose-5'-phosphate aminotransferase activity. The alternate enzyme seems to be also controlled at the gene-level by one or more intra-cellular purines (repression-derepression). The role of the aminotransferase in …
Homeotherm Productivity And Activity As A Function Of Microclimatological Variables, June K. Rushing
Homeotherm Productivity And Activity As A Function Of Microclimatological Variables, June K. Rushing
Biology
The purpose of this paper is to advocate the use of computer modeling as a tool in the study of homeotherm energetics. The relationships between measurable environmental variables and components of productivity were reviewed and discussed as a basis for data input in the models. Photoperiod, temperature, rainfall, and wind were suggested as measurable environmental parameters. The facets of productivity which can be predicted from these parameters are the timing, the energetic cost, and the energetic capacity for productivity.
Amino Acid And Protein Metabolism During Development Of The Alfalfa Weevil Hypera Postica (Gyllenhal), Darrel J. Gunderson
Amino Acid And Protein Metabolism During Development Of The Alfalfa Weevil Hypera Postica (Gyllenhal), Darrel J. Gunderson
Biology
Amino acid and protein metabolism were studied during growth and development of the alfalfa weevil. The amino acids were separated and identified by two-dimensional thin layer chromatography on cellulose plates and quantitative determinations were made with a ninhydrin spectrophotometric method. The radioactive isotope glucose-U-C14 was used to determine amino acid requirements and their rates of synthesis. A total of 23 amino acids were identified in the fourth instar larvae. Of these, 21 were free amino acids and 17 were protein amino acids. Limited concentrations of methionine, Y-aminobutyric acid and tryptophan in the insect were directly correlated with their dietary …
Chemical Differences Between Nectar Of Onion And Competing Plant Species And Probable Effects On Attractiveness To Pollinators, Gordon D. Waller
Chemical Differences Between Nectar Of Onion And Competing Plant Species And Probable Effects On Attractiveness To Pollinators, Gordon D. Waller
Biology
Levels of potassium in nectar of onion, Allium cepa L., varied from 3600 to 13,000 parts per million, about ten times higher than that of nectar of competing flora tested. An open-pollinated amphidiploid derived from the interspecific cross, A. cepa x A. fistulosum L., was the only onion with nectar potassium level as low as that of competing flora, and it was more attractive to honey bees, Apis mellifera L., than was the common onion. Addition of potassium salts to sugar solutions at the rate of 1500, 3000, 4500, 6000, or 7500 parts per million potassium clearly reduced uptake of …
Purification And Properties Of L-Asparaginase (L-Asparagine Amidohydrolase, Ec 3.5.1.1) From Bacillus Kaustophilus, Amin Abdul-Jabbar Al-Selami
Purification And Properties Of L-Asparaginase (L-Asparagine Amidohydrolase, Ec 3.5.1.1) From Bacillus Kaustophilus, Amin Abdul-Jabbar Al-Selami
Biology
L-asparaginase was isolated and purified 60 fold from Bacillus kaustophilus by heat treatment, ammonium sulfate fractionation, adsorption chromatography on glass beads and preparative electrophoresis. The purified sample from ammonium sulfate precipitation and adsorption chromatography on glass beads could be stored at 4 C for several weeks and could withstand freezing and thawing without loss of activity. Kinetic studies showed that this L-asparaginase has a temperature optimum of 74 C, an activation energy of 11,400 calories, a pH optimum of 9.2 in sodium carbonate-bicarbonate buffer and Michaelis constant for asparagine of 3.7 x 10-3 Mat 74 C and pH 9.2. …
Tissue Mineral Imbalances In Cattle With Brisket Disease, Patricia H. Field
Tissue Mineral Imbalances In Cattle With Brisket Disease, Patricia H. Field
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Twenty four cattle, six each of healthy cows and calves, and cows and calves with brisket disease, were obtained, examined and slaughtered. The concentrations of calcium, chloride, cobalt, copper, iron, magnesium, molybdenum, phosphorus, potassium, sodium and zinc; and percent absolute dry matter and percent ash were determined in tissues selected from the following: cardiac, hepatic, renal, osseous, whole blood and blood serum. In addition, certain physical and biological parameters were recorded for each animal. The results were analyzed as a 2 x 2 factorial, segregating the effects of age and brisket disease, and the age-disease interaction.
The following statistically significant …
Irrigation And Non-Irrigation Alternatives For Reducing Sugar Cane Transportation Costs In Santa Cruz, Bolivia, Lee M. Bailey
Irrigation And Non-Irrigation Alternatives For Reducing Sugar Cane Transportation Costs In Santa Cruz, Bolivia, Lee M. Bailey
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The major objective of this study was to investigate various alternatives for lowering the cost of transporting sugar cane in Santa Cruz, Bolivia. These alternatives included both irrigation and non-irrigation possibilities. Production costs for sugar cane were determined by using studies completed by the USAID-Utah State University study team, budget studies of Senor Carlos Castro of the Guabira' sugar cane mill in Santa Cruz and a study undertaken by Senor Enrique Gomez, a graduate student at Utah State University.
A cane registry commissioned by the National Sugar Cane Commission was used in conjunction with a least-cost transportation model in order …
Economic Efficiency Of Grazing Systems, Muhammad Nazir
Economic Efficiency Of Grazing Systems, Muhammad Nazir
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Benefits and costs of implementing the specialized grazing systems on federal rangelands managed by the Bureau of Land Management (BLM) were studied. First only the direct benefits and costs were used to determine the internal rates of return on the Bureau of Land Management investments in grazing systems. Secondly, the effects of these systems on profits of private ranchers were determined. Finally the benefits and costs stream on the Bureau of Land Management and the changes in ranchers' profits were brought together to find out the net gain to society from investing the federal funds in specialized grazing systems.
The …
Population Biology Of The Black-Tailed Jackrabbit (Lepus Californicus) In Northern Utah, L. Charles Stoddart
Population Biology Of The Black-Tailed Jackrabbit (Lepus Californicus) In Northern Utah, L. Charles Stoddart
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Population biology of the black-tailed jackrabbit population on a 250-square-mile area in Curlew Valley, northern Utah, was studied from 1962-70. During this period the fall population density index increased from 40.0 in 1962, to 60.6 in 1963, decreased progressively to a low of 21.2 in 1967, then increased the following 3 years to a high of 185.0 in 1970.
Breeding was synchronous with four conception periods each year; in some years a fifth conception period was evident. The first conception period occurred about the last half of January; other periods followed at 40-day intervals indicating a 40-day gestation period and …
Population Ecology Of Uinta Ground Squirrels, Norman A. Slade
Population Ecology Of Uinta Ground Squirrels, Norman A. Slade
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The behavior and ecology of Uinta ground squirrels (Spermophilus armatus) at the Utah State University Forestry Field Station northeast of Logan, Utah were studied from 1964-1971 to determine the role of behavior in population regulation. From 1965 to 1968, data were collected to establish population norms. In 1968, the population density was reduced experimentally to help elucidate regulatory processes. This paper compares the dynamics of the population before and after the population reduction.
Before the density reduction, juvenile survival was lower than that of yearlings and adults. The disappearance of juveniles was associated with their tendency to disperse …
Visual Perception In Pre-School Children, Howard Mark Bardwell
Visual Perception In Pre-School Children, Howard Mark Bardwell
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study was undertaken to determine if sessions in discrimination tasks with the aid of instructional cues would influence the visual perceptual abilities of pre-school children. The research was conducted in the Child Development Laboratories at Utah State University. Twenty children were used--ten in the experimental group and ten in the control group. The ten children in the experimental group were given training in performing tasks that required ability in visual perception. The ten children in the control group received no such training.
It was found that the ten children who received the individualized instruction scored significantly higher on post-test …
The Use Of Story Reading As A Method Of Improving Verbal Expression Of Head Start Children, Romayne Norris Sternad
The Use Of Story Reading As A Method Of Improving Verbal Expression Of Head Start Children, Romayne Norris Sternad
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this experimental study was to conduct and evaluate a teaching method for improving verbal expression performance of Head Start children. The teaching method of language stimulation given the experimental subjects was based on story reading and retelling with active participation by the children in daily small group tutoring sessions, for seven weeks. An academic program given the control subjects included specific vocabulary and sequencing training. Verbal expression was measured by an analysis of stories told by each subject before and after tutoring, in response to sequence pictures and standup figures. Measures of vocabulary, sentence structure and evidence …