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Fluoride Effects On The Growth And Morphology Of Two Thermophilic Cyanophytes Synechcoccus Lividus And Phormidium Laminosum, Ibrahim A. Arif

Biology

The effects of various concentrations of fluoride on growth of two thermophilic cyanophytes, Synechococcus lividus (unicellular) and Phormidium laminosum (filamentous) were studied. Growth of both algae was inhibited by fluoride in the concentrations tested. As the concentrations of fluoride increased, an extended adaptation lag phase was encountered. Synechcoccus lividus was more sensitive to fluoride than was Phormidium laminosum, being inhibited in total growth as well as growth rate. Fluoride effects on growth were compared to chloride and to chloride plus fluoride. The growth of S. lividus was stimulated by chloride alone and in combination with fluoride at all concentrations used; …

A Taxonomic Study Of Leymus Ambiguus And L. Salinae (Poaceae), Riley J. Atkins

Biology

Morphological studies of populations in Utah, Idaho, Arizona, and Colorado belonging to three taxa of Leymus Hochst. revealed that L. salinae (M. E. Jones) A. Love is comprised of two subspecies, subsp. salinae and subsp. salmonis (C. L. Hitchcock) R. J. Atkins comb. nov. Leymus ambiguus (Vasey & Scribner) D. R. Dewey is distinct from these two taxa and occurs in the Colorado Front Range. Tetraploid (2n=28) and octoploid (2n=56) races occur in both L. salinae subsp. salinae and L. ambiguus, but only tetraploids were found among L. salinae subsp. salmonis. A naturally occurring hexaploid (2n=42) was discovered in one …

The Effects Of The Antifertility Agent Af1312/Ts On The Testis And The Epididymus Of The Laboratory Mouse: A Light And Electron Microscope Study, Lyla M. Wagley

Biology

AF1312/TS, an antifertility agent synthesized by Silvestrini and associates in Italy, has the potential to be developed as a contraceptive in human males. This chemical's action is extremely specific, affecting initially, only the elements of the seminiferous epithelium. The drug's action is reversible, and dose, and species specific. This study was undertaken to observe the general morphplogical changes in the testis and epididymis of the mouse due to oral dosing with AF1312/TS. Damage was so drastic, it was evident with the light microscope. Fine structural analysis was used to determine the cell types involved, as well as the organelles damaged …

A Comparison Of The Vegetation On Soils Derived From Dolomite And Quartzite In The Bear River Range, Utah And Idaho, Elizabeth E. Neely

Biology

A comparison was made of the vegetation on soils derived from the Swan Peak Quartzite and the Fish Haven Dolomite Formations in the Bear River Range of northern Utah and southern Idaho. Eight sites on open slopes were selected for study along the contact line between the two geologic formations. Two 600 m2 plots with similar elevation, slope and aspect were established at each site. The vegetation was analyzed over two field seasons by determining the species present and their percentage of canopy cover. Soils were analyzed for nutrient levels, moisture content and texture. Differences were found in vegetation patterns …

The Robber Flies (Diptera: Asilidae) Of Utah, Charles Riley Nelson

Biology

As a result of taxonomic investigations, 157 species of Asilidae are recognized as occurring in Utah. Keys for subfamiles, genera, and species are given, along with information on seasonal and distributional occurrence in Utah. Seventy-six maps and fifty-seven figures are included, which show the Utah distribution of each species and illustrate important characters used in the keys. Trends in distributional patterns are discussed.

The Effects Of Neutral And Sex-Specific Terminology On Sex Stereotyping, Natalie J. Malovich

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was conducted to examine the effects of neutral and sex-specific terminology on sex stereotyping in regard to two primary questions: 1) whether or not the use of sex-neutral terminology alters subjects ' associations to particular words, and 2) whether, in the absence of gender identification, subjects make traditional sex-role assumptions about neutral terms. A third questions examined potential differences in male and female subjects' responses to neutral and sex-specific terminology.

Using a semantic differential technique, 40 male and 40 female volunteer subjects described a number of occupations and roles identified by sex-specific or sex-unspecified labels. Descriptions of those …

The Effect Of Long Term Storage Of Nonfat Dry Milk On Sensory Quality And On The Development Of Oxidative Derivatives Of Sterols, Nancy R. Driscoll

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nonfat dry milk (NOM) was evaluated to determine the effect of long term storage on its sensory quality, its solubility index and on the development of oxidative derivatives of sterols. Storage variables included the form of the milk, the atmosphere in the storage container, the type of package and the storage temperature. A trained taste panel evaluated the milk for the development of cooked, metallic, and oxidized/stale flavors, mouthfeel and overall acceptability. Gas chromatography was used to determine cholesterol content and the quantity of oxidative derivatives of cholesterol present in the samples.

Although long term storage of NOM did not …

Childhood Experiences In Mormon Polygamous Families At The Turn Of The Century, Dorothy Geneve Young Willey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary purpose of this research was to gain insight into what childhood was like in turn-of-the-century Mormon polygamous families. This purpose was executed through two main avenues: basic empirical data and descriptive accounts. This type of research was crucial inasmuch as previous research and commentaries dealt with adult relations but little was known about children in this complex Mormon family structure.

In order to gain an understanding of childhood in Mormon polygamous families during this era, forty elderly individuals who were reared in plural marriages were interviewed in depth. A field type design was employed using a historical-cultural; in …

Investigation Of Selected Aspects Of Kokanee (Onchorhynchus Nerka) Ecology In Porcupine Reservoir, Utah, With Management Implications, Paul Joel Janssen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several aspects of kokanee (Onchorhynchus nerka) ecology were studied in the fluctuating, 80ha Porcupine Reservoir, Utah in order to determine optimum management strategies. In 1981, escapement was enumerated and estimates of egg deposition were made. An estimate of the resulting fry recruitment was also attempted and was successful up to the arrival of spring runoff. In 1982, escapement was enumerated and estimates of egg deposition were made, with subsequent estimates of egg deposition and percent survival to the advanced eyed stage. Age and growth rates were determined and survival rates estimated.

Escapement for 1981 and 1982 was 5,463 …

Using Videodisc Technology And The Index Of Nutritional Quality To Teach Dietary Guidance To Young Adults, Glenda Wigginton Edmunds

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A review of the literature indicated a need for nutrition education materials to be current with prevailing scientific knowledge, using advanced instructional technology. Individuals need help in applying nutrition principles to their dietary practices.

A nutrition education program utilizing the nutrient density concept and the dietary guidelines for use on videodisc with microcomputer interface was developed and evaluated. The evaluation of the program did not prove to be effective statistically but learners did show an interest in the program and had positive feedback in regard to the information presented and the technology used.

Selection And Preparation Of Lactic Culture Starters For Manufacture Of Cheddar Cheese, Aly Youssef Gamay

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A Spiral Plater and a Microtiter system were used to isolate and evaluate cultures for a paired strain culture program. Bacteriophage and temperature sensitivity data of 43 Streptococcus cremoris strains were introduced into a computer cluster program to pair the least similar strains.

Selected pairs were challenged with phage. Resistant mutants were developed.

Characteristics of proteinase positive and proteinase negative variants were examined. Proteinase positive isolates produced more changes in pH, cell mass and more generations in milk than their counter-parts. Paired proteinase negative cultures produced more change in pH and cell mass and more generations in milk than single …

Development, Implementation And Evaluation Of An Education Course For The Utah State University Coordinated Undergraduate Medical Dietetics Program, Cynthia Olson Obermiller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The entry-level clinical dietitian must possess competencies in the area of communications and in the process of education. Training and practice in these areas, as related to the profession of dietetics, must be provided during the professional phase of the dietetic student's training. The purpose of this study was to develop, implement and evaluate a course for the Coordinated Undergraduate Medical Dietetics Program at Utah State University. This course, entitled Education in Clinical Dietetics, was added to the junior year fall quarter curriculum. The ten-week course combined didactic and lab experiences to provide the students with a thorough background in …

Evaluation Of The Early Establishment Phase Of Agropyron Desertorum, Medicago Sativa And Atriplex Canescens In Monocultures And Mixtures, Oscar Luis Prado Escobar

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study evaluated the early establishment phase of various monocultures and mixed species plantings of Agropyron desertorum (AGDE), Medicago sativa (MESA), and Atriplex canescens (ATCA). The study was conducted under both greenhouse and field conditions. In the greenhouse, the experimental design was a split-plot, randomized-block design in time, using transplanted seedlings. The treatments were exposed to three water levels to determine species response to varying moisture availability. Plastic pots of 15.4 cm (diameter) by 17.9 cm (depth) were filled with 2,800 g of sandy-loam soil and brought to field capacity. The pots were weighted twice weekly and the water lost …

Social Interaction: The Relationship Between Facial Attractiveness And Verbal Influence Style, Laurie Jean Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine if male and female communicators utilize different styles of persuasion with an attractive versus an unattractive female target. Forty undergraduate students were asked to persuade a female confederate in either an attractive condition or an unattractive condition to eat M&M's. Perceptions of attractiveness and personality assessments were checked by a post-experimental questionnaire. Influence attempts were rated and categorized by the use of the Social Interaction Scoring System. Individual responses were then factor analyzed to identify profiles of persuasive communication. These behavioral profiles were then statistically compared across experimental conditions by analyses of …

The Prediction Of Tenure And Job Performance Based On The Job Activity Preference Questionnaire (Japq): A Concurrent Study, Nolan R. Roberts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to assess the concurrent validity of the JAPQ in predicting the work output and tenure levels of persons employed in the occupation of Data Entry Operator-Financial Keyer. Three separate hypotheses were tested: (1) JAPQ-D² differences based on employee tenure and output loads; (2) JAPQ dimension preference differences, which may not be reflected in JAPQ-D² scores; and, (3) the relationship between employee tenure and employee output. Separate research questions focused on the applicability of the JAPQ in predicting employee tenure and employee output, based on multiple regression results.

Sixty financial keyers were administered …

Electronic Feeding Doors For Individual Feeding Of Group Housed Sheep Compared To Individual Housing And Feeding Or Group Housing And Feeding, Ronald J. Lane

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thirty-six mature purebred cheviot ewes and 36 polypaysired wether lambs were used in two separate experiments to determine the usefulness of an electronic feeding door as contrasted with traditional feeding situations. The sheep were stratified by weight into three management categories; group housing and feeding (G+G), individual housing and feeding (1+1), or group housing and individual feeding (G+1) using an electronic feeding door. The weight stratification formed a light and a heavy weight class resulting in a 3x2 factorial design. Two different training procedures were used to arrive at a generalized 14-day training sequence that does not require physical handling …

An Extension Teaching Demonstration Using Broiler Chicks As A Model, Joseph B. Ishaya

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This test demonstration was intended to develop a modern management program to improve broiler production in Nigeria through extension teaching methodology. The management programs included animal health, nutrition, and general care.

Some of the factors that limit broiler production in Nigeria are associated with the management strategy presently adopted by Nigerian subsistence farmers.

This report considers the effect of different protein sources on broiler nutrition and the techniques necessary to get the farmers to practice the result of up-to-date research findings.

The extension teaching demonstration reported here is based on 60 day-old chicks. Chicks were randomly assigned to two pens, …

Effects Of Physical And Emotional Stress, Catecholamines And Naloxone On Hdl And Ldl Cholesterol Levels In Rats And Man, Andrew G. Goliszek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of investigations were undertaken to determine whether physical or emotional stress, catecholamines or naloxone (B-endorphon blocker) would increase serum total cholesterol and LDL and HDL levels. Physical stress given daily over a period of time caused a steady increase in serum total cholesterol and LDL without a significantly altering high density lipoproteins (HDL) or serum triglycerides. Daily injections of epinerphrine in oil caused an increase in both serum total cholesterol and LDL levels while daily injections of norepinephrine did not. Reversal of the treatments caused a reversed response in both groups of rats. Similar increases in both total …

Mule Deer Reproduction And Survival In The Lasal Mountains, Utah, Randall B. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mule deer (Odocoileus hemionus) reproduction and survival on the LaSal Mountains, Utah were studied from 1978-81. Reproductive rates were high, suggesting that summer and fall forage quality was adequate and was not responsible for low recruitment observed in recent years. The combined fetal rate, determined from laparotomies and carcasses, was 1.72 for all females older than 1 year (N = 114). Fetal rates were 1.15 for yearlings (N = 20), 1.80 for prime females (2-7 years, N = 78), and 1.75 for old females (8+ years, N = 16). No evidence of breeding was found among fawns (N …

Subunit Interactions In The Inducible Arginine Decarboxylase From Escherichia Coli B, Catalina N. Depusoy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The nature of the subunit interactions in the inducible arginine decarboxylase from Escherichia coli B is of considerable interest because of the observed differences in the catalytic activities of the dimer and the decamer; the decamer is active and the dimer is inactive. To study these interactions, inactive dimers were prepared by sodium borohydride reduction of the E-amino--pyridoxal-P Schiff base. Hybrid decamers were then prepared from varying molar ratios of native and reduced dimers. The hybrid decamers were indistinguishable from native decamers as observed in the analytical ultracentrifuge and on acrylamide gel electrophoresis. Kinetic studies indicated that true hybrids were …

Photochemical Energy Storage (Photosensitized Isomerization Of Norbornadiene To Quadricyclane By Copper(I) Complexes), Dennis J. Fife

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research has focused on the sensitized photoisomerization step of a solar energy storage system based on the interconversion of norbornadiene (NBD) and quadricyclane (Q). Sensitizers studied in the photoisomerization were arylphosphine complexes of copper(I) halides [(Ph₃P)₃CuX, (MePh₂P)₃CuX, (DIPHOS)CuCl; X = Cl, Br, I and DIPHOS = Ph₂P(CH₂)₂PPh₂]. The lowest electronic excited state of the complexes can be an effective triplet energy sensitizer as evidenced by a maximum quantum yield of 1.0 with (MePh₂P)₃CuX. The sensitization mechanism of the L …

Effects Of A Wildfire On Seed Rain And Soil Seed Reserve Dynamics Of A Good Condition Sagebrush-Grass Rangeland In Central Utah, Mohamed Ali Hassan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objectives of this research were to investigate the ecological importance of soil seed reserves and seed rain on regeneration of a good condition sagebrush-grass range vegetation after a wildfire and draw conclusions leading to better understanding and management of such ecosystems. Investigations were conducted for two successive years on a community where major plants were neither rhizomatous nor sprouting. In such cases soil seed reserves and seed rain have to be the main source of regeneration. In addition to monitoring soil seed reserves and seed rain, vegetation changes during the past two years and the historical conditions of the …

Development And Pathogenicity Of The False Root-Knot Nematode Nacobbus Aberrans And Its Relationship With Heterodera Schachtii And Meloidogyne Hapla On Sugarbeet, Renato Nunzio Inserra

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Duration of embryogenic development of a Nebraska population of Nacobbus aberrans at 15 and 25 C were 51 and 9-10 days respectively. The first juvenile (J1) molted in the egg and the nematode emerged as J2. Kochia and sugarbeet root leachates did not significantly affect the percent of cumulative egg hatch. Temperature significantly affected juvenile emergence (P= 0.05), as less than 1, 5, and 20% of the eggs hatched at 5, 10 and 15 C, respectively. More than 70% of the eggs hatched at 20 and 25 C. At 25 C, postembryogenic development from egg to egg was …

Limitations Of Computerized Impact Assessment Models For Planning In Small Towns, Mark Richard Brown

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Western boomtowns have been the focus of intense planning activity since the early 1970's. The goal of this activity has been to manage rapid growth caused by large energy, industrial, and resource developments. Planning assistance has been made available to impact communities in a variety of forms including financial aid from senior levels of government and from impacting industries, economic and demographic forecasting models, growth-management consulting firms, case studies, and comprehensive handbooks for community action. There has been rapid mobilization of sophisticated administrative and technical expertise to mitigate the problems of impacted communities.

Plant Responses To Clinostating And Mechanical Stress: Growth And Flowering Responses, Chauncy Steed Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plants rotated about a horizontal axis show certain growth responses. This research was designed to clarify which of the responses of clinostating are caused by gravity compensation and which are caused by mechanical stresses. Plants used were Xanthium strumarium L. (cocklebur) Chicago strain and Lycopersicon esculentum Mill. (tomato) cv. Rutgers. Six automated treatments that ran for five days were used to separate out the effects. Treatments were: 1) controls, 2) horizontal clinostat, 3) intermittent clinostat, 4) inversion (every 10 min), 5) invert and return, and 6) vertical rotation. Plant height and diameter changes were measured at ink dots with a …

Crsp Power Peaking Capacity: Generation At Outlet Glen Canyon Unit, Arizona: Concluding Report, Robert N. Broadbent, Clifford I. Barrett

Elusive Documents

No abstract provided.

Development Of Microstructure In Set-Style Nonfat Yogurt - A Review, Miloslav Kalab, Paula Allan-Wojtas, Beverley E. Phipps-Todd

Food Structure

The development of microstructure in natural set-style nonfat yoghurt was stud i ed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In addition to thin-sectioning and conventional SEM described in the literature, this review illustrates gelation of milk with micrographs obtai ned by rotary shadowing of casein micelles and their clusters. The existence of void spaces occupied by lactic acid bacteria in yoghurt was con finned by cold-stage SEM of uncoa ted specimens. The microstructure of yoghurt is affected by the preheat treatment of milk, bacterial starter cultures, total solids content , and the presence of thickening agents. …

Food Microstructure

Food Structure

No abstract provided.

Llaffs - A Lightning-Locating And Fire-Forecasting System, United States Department Of Agriculture, Forest Service

Forestry

This publication contains programs and documentation to implement an algorithm for calculating lightning fire probability. This calculation is based on a model originally developed for the National Fire-Danger Rating System. The model algorithm estimates the probability that a lightning discharge from cloud to ground will ignite a fire in fuels at the ground terminus of the lightning. Probability is estimated using variables that are measures of the fuel state and type, rain, and lightning. Details of the model can be found in Fuquay and others (1979), Latham (1979), and Fuquay (1980).

Measuring Species Diversity On Revegetated Surface Mines: An Evaluation Of Techniques, United States Department Of Agriculture, Forest Service

Mines and Mineral Resources

This report reviews the three most commonly used techniques for measuring species diversity in plant communities: (1) diversity indices, (2) rank correlation tests, and (3) similarity indices. The author discusses the suitability of each technique for assessing species diversity on mined land and evaluates the most often used indices, test statistics, or coefficients of each technique. Applications of the Shannon-Weiner diversity index, Spearman's rank order correlation coefficient, Motyka and others' and Bray and Curtis' version of Sorensen's similarity index, and Spatz' version of Jaccard's index for assessing mined land species diversity are presented in the appendix.