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A Trophic Gradient Analysis Of Lake Powell: The 1994 Utah State University Aquatic Ecology Laboratory Analyses, Wayne A. Wurtsbaugh, Megan Barker, Ron Brunson, David Fogle, Scott Hawxhurst, Chad Mellison, Lis Phillips, Felipe Queiroz, Daniel Zamecnik

Watershed Sciences Faculty Publications

From 9-11 April, 1994, the Aquatic Ecology Laboratory Class (FW462) of Utah State University sampled the upper reaches of Lake Powell to assess if a trophic gradient existed. We °ampled physical and chemical parameters (temperature, oxygen, conductivity, and total phosphorus), phytoplankton chlorophyll a, littoral and pelagic zooplankton biomass and composition, littoral and profundal benthic invertebrates, and fish abundance measured in the littoral zone (gill nets) and the pelagic zone (hydroacoustics). Data was collected along the upper 50 miles of the reservoir between Bullfrog and the Hite marina near the Colorado River inflow.

Our field trip was done just prior to …

Physical And Functional Characteristics Of Cellclumping In Lactose-Positive Transconjugants Of Lactococcus Lactis Ssp. Lactis Ml3, H. Wang, Jeff Broadbent, J. K. Kondo

Nutrition, Dietetics, and Food Sciences Faculty Publications

Transconjugants of Lactococcus lactis ssp. lactis ML3 that acquire the ability to utilize lactose often exhibit self-aggregation and become able to transfer the ability to utilize lactose at frequencies 102 to 105 times higher than strain ML3. Our laboratory investigated the physical and functional characteristics of cell aggregation in ML3 transconjugants. Results showed that donor cell auto-aggregation was dissociated when cells were suspended in buffers that contained EDTA or when they were briefly exposed to proteinase K or α-chymotrypsin. Conjugation studies revealed that disruption of donor cell aggregation substantially decreased the efficiency of lactose plasmid transfer. Dissociation by EDTA or …

Insights, Fall, 1993, Utah State University

Discovery Magazine

Bi-annual alumni newsletter for the College of Science of Utah State University in Logan.

Rejex-It™Ag-36, A Potential Tool To Protect Seeds From Bird Depredation, Peter F. Vogt

Wildlife Damage Management Conference

The ever increasing bird populations (e.g., Black birds, geese etc.) are known to cause considerable losses to agriculture. This problem has reached serious proportions for crops that are farmed on large tracts and are seeded by aerial application such as rice and canola. ReJeX-iT™AG-36, a non-toxic, biodegradable bird aversion formulation, derived from food grade ingredients, has been proven in pen tests and field trials to be effective as a seed treatment to prevent birds from eating the treated seeds. The product does not harm the seeds or the effected birds in any way, even if ingested; it just makes the …

Can We Landscape To Accommodate Deer? The Tracy Estate Research Garden, Helen H. Heinrich, Susan Predl

Wildlife Damage Management Conference

The landscape of New Jersey is remarkably rich in vegetation and open space, despite the state's reputation as the nation's most populous state. This landscape is increasingly the product of intense interaction between the white-tailed deer (Odocoileus virginianus) and both native and cultivated vegetation, particularly in suburban communities, where both the whitetail and the vegetation coexist in abundance. Nearly extirpated at the tum of the century due to over-hunting, the state's white-tailed deer population today exceeds 140,000 because habitat is ideal and hunting seasons are carefully regulated. In many instances, where landowners choose not to use hunting as …

Balancing The Needs Of Society: Listening To The Public, Robert H. Schmidt

Wildlife Damage Management Conference

Wildlife damage management, as a professional activity, is involved in a broad range of management issues affecting agricultural productivity and profitability, human health and safety, and endangered and valued species management. Surveys by S. Kellert and others have indicated that the general public is agreeable to resolving wildlife damage issues, even utilizing lethal technologies. However, surveys and case histories have also indicated that the process involved in resolving wildlife damage issues invokes much public concern. By process I mean the specific methodologies, strategies, and resource and social tradeoffs involved in developing and implementing a wildlife damage management program.

Proceedings From The 30th Annual Marschall Italian Cheese Seminar, Various Authors

Cheese Industry Conference

Our interviews with cheese makers, owners, managers, and top management of mozzarella processing companies across the United States resulted in our quest for accurate data from which an automatic Mozzarella processing systems could be designed.

Ascorbic Acid Is An Abettor In Calcium Urolithiasis: An Experimental Study, P. P. Singh, R. Kiran, A. K. Pendse, Reeta Ghosh, S. S. Surana

Scanning Microscopy

Two sets of animal experiments using guinea pigs were planned to evaluate the effect of ascorbic acid supplementation on the lithogenic process. In the first set of experiments, 10, 40, and 60 mg doses of ascorbic acid/100g body weight/day were given for 105 days. Neither of the ascorbic acid doses given induced crystalluria, calcification or stone formation, thereby confirming our previous findings that ascorbic acid in the doses used by clinicians does not cause urolith formation. In the second set of experiments, ascorbic acid was supplemented in hypercalciuric (induced by calcium carbonate feeding) and hyperoxaluric (induced by sodium oxalate feeding) …

The Syringomycins: Finding Their Role In Nature, Jon Takemoto

Faculty Honor Lectures

About ten years ago, I began looking for a research problem in the field of plant-microbe interactions. As the name implies, this is the study of how plants and microorganisms associate-either for their mutual benefit or at the expense of one partner. An example is symbiotic nitrogen fixation between leguminous plants and root-colonizing bacteria. Both benefit-the plant gains nitrogen in a useful form and the bacteria gain nutrients and protection. A better understanding of a plant-microbe interaction system could be used to benefit agriculture. For example, boosting nitrogen fixation would mean less petroleum-derived nitrogen fertilizers. These interactive biological systems and …

Transformation And Gene Isolation By Functional Complementation In Cryphonectria Parasitica, The Chestnut Blight Fungus, Alice C. L. Churchill

Biology

An efficient DNA-mediated transformation system has been developed for the chestnut blight fungus Cryphonectria parasitica. Twelve vectors, each containing one of three dominant selectable antibiotic genes, were tested for their ability to confer resistance to either hygromycin B, benomyl, or G418 sulfate. Transformants were obtained with each vector screened, and in each case, transformation occurred by integration of the transforming DNA into the host genome. The cosmid vector pMOcosX conferred hygromycin B resistance to transformants at an efficiency of greater than 10⁴ transformants/µg DNA and was utilized for the construction of a wild-type genomic DNA library. This library …

The Reproductive Biologies Of Two Rare Species Of Astragalus (Fabaceae), A. Montii Welsh And A. Humillimus Gray Ex Brandegee, Susan M. Geer

Biology

Astragalus montii and A. humillimus are rare species that are isolated geographically as the result of growing on mountain tops or mesa tops. The breeding systems and pollinators of these two species were examined, as well as the effects of seasonality and water additions on fruit set of A. humillimus. The breeding system of A. montii was described and compared to that of two widespread sympatric congeners, A. miser and A. kentrophyta. Percent open-pollinated fruit set for A. montii was about as high as one congener and twice as high as the other. Only A. montii was autogamous. …

Growth And Water Relations Of Liquidambar Styraciflua L In An Urban Park And Plaza, Roger Kjelgren, James R. Clark

Plants, Soils, and Climate Faculty Publications

Growth and water relations of 10-year-old sweet gum (Liquidambar styraciflua L.) street trees were studied in sites with low and high potential evapotranspiration to determine how these differences are integrated by growth and water relations over time. The trees were located in the parking strip between the curb and sidewalk at a partially vegetated urban park and an urban plaza in Seattle, Washington. Crown size, and seasonal and diurnal stomatal conductance and water potential, as well as diurnal air temperature and humidity, were measured over 2 growing seasons. Yearly trunk growth since transplanting was measured from increment cores. Vapor pressure …

The Cache Valley Shoshones: Cultural Change, Subsistence, And Resistance, To 1870, John W. Heaton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the eighteenth and nineteenth centuries, the xii Shoshones of Cache Valley evolved from scattered pedestrian hunter-gatherers to large, armed, mounted bands that hunted and gathered from the Great Basin to the Plains. Trade with European Americans helped initiate this evolution. However, Shoshones did not respond passively to the presence of European Americans. Shoshones actively sought change, and incorporated trade goods into their culture within a Shoshone context. They adapted to each wave of European Americans that they encountered. When Mormons dispossessed them of their land, Cache Valley Shoshones resisted by going on the offensive. Finally overwhelmed, the remnants of …

Postbreeding Ecology Of Adult Male Northern Pintails And Cinnamon Teal Near Great Salt Lake, Utah, Robert R. Cox Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I studied nutrient reserves, digestive organs, molt intensity, diets, and seasonal changes in food resources available to postbreeding adult male Northern Pintails (Anas acuta) and Cinnamon Teal (Anas cyanoptera) in marshes near Great Salt Lake, Utah. Total lipid and protein reserves of Northern Pintails were lower during the flightless period than before or after. For Cinnamon Teal, total protein was lowest during the flightless period, and total lipid showed a similar trend. Total mineral did not differ among plumage classes in either species. Use of nutrient reserves in these species may be an endogenous rhythm in …

Treatment Of Low Quality Forages By Hydrogen Peroxide And(Or) Anhydrous Ammonia And Their Utilization In Ruminant Nutrition, Mohammed Diouri

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three experiments were conducted to evaluate low quality forages treatment by anhydrous ammonia (NH₃) and(or) hydrogen peroxide (H₂O₂).

In experiment I, a control and three treatments of barley straw were compared: NH₃, NH₃ after rehydration of the straw with water (NH₃+H₂O), and NH₃ after rehydration with a H₂O₂ solution (NH₃+H₂O₂). Forages were fed, with a supplement, at two levels of intake (ad libitum and 75% of ad lib.). Treatments were administered in a split-plot in a Latin …

Effects Of Rumen-Protected Amino Acids On Production In Holstein Cows, David Paul Dawson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Six nonlactating Holstein cows fitted with rumen and duodenal cannula were used to determine the efficacy of pH sensitive fatty acid polymer encapsulation as a means protecting amino acids from rumen fermentation and as a post-ruminal amino acid delivery system. The cows were arranged in a 2 X 2 factorial in a Latin Square design. Treatments were 1) the basal ration, and 2) basal ration plus rumen-protected lysine, methionine, and threonine at 10 g each per day.

Rumen parameters measured were pH, ammonia, volatile fatty acids, protozoa, liquid, and dry matter rate of passage, total viable bacteria, and viable cellulolytic …

The Relationship Between Perceived Parenting Styles And Adolescent Locus Of Control And Self-Concept, Lisa Ann Mcclun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Relationships between adolescents' perceptions of their parents' responsiveness and demandingness, adolescents' locus of control orientation, and adolescents' self-concept ratings were investigated. Subjects included 198 students from a middle school in northern Utah. Subjects were given the Nowicki-Strickland Internal-External Control Scale for Children, the Harter Self-Perception Profile for Adolescents, and the Perceived Parenting Style Survey.

Results indicated that subjects who perceived their parents as being authoritative had significantly (p < .001) more internal locus of control scores than subjects who reported either the permissive or authoritarian styles. Also, self-concept scores were significantly higher (p < .001) for the authoritative group than the authoritarian group on the Self-Perception Profile for Adolescents subscales of Scholastic Competence, Social Acceptance, Physical Appearance, Behavioral Conduct, Close Friendship, and Global Self Worth. The permissive group reported significantly lower scores (p < .05) on the subscales of Scholastic Competence and Behavioral Conduct. There was also a significant negative correlation (p < .001) between locus of control scores and the subscale scores on the Self-Perception Profile for Adolescents.

Although there were some limitations in the study methodology, the significant differences found between the groups indicated that the authoritative parenting style positively correlates with higher self-concept and …

Intraventricular Hemorrhage Sequelae In Low Birthweight Infants: A Meta-Analysis, Shannon G. Thompson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Technological advances in neonatal care have dramatically improved the survival and disability rates among low birthweight infants (LBW). One common factor associated with later problems among these babies is intraventricular hemorrhage (IVH). A meta-analysis was conducted among LBW infants with and without IVH to determine developmental outcome. More than 450 studies were located. Only 125 studies met inclusion criteria.

Mean effect sizes were computed by comparing the LBW group to either a fullterm control group or to test norms. When compared to fullterm children, LBW children scored worse in all areas except gross motor skills.

Cognitive assessment was done commonly …

Formation Of Polycyclic Aromatic Hydrocarbons On The Surfaces Of Ultra-High Temperature Treated Meat, Michelle T. Foote

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of ultra-high temperature (UHT) on production of polycyclic aromatic hydrocarbons (PAHs) on the surface of beef steaks was determined. Beef steaks were treated with five treatments, raw, UHT, UHT/grill marks, UHT/grill marks/microwave, and charcoal grilled. Four PAHs, benzo[a]pyrene, benz[a]anthracene, benzo[b]fluoranthene, and benzo[k]fluoranthene, were quantified. High performance liquid chromatography (HPLC) and gas chromatography (GC) were used to purify and analyze the PAH extracts, respectively. Levels of PAH found on charcoal-grilled steaks were higher than those observed in the literature. A balanced incomplete block design was used to analyze the data. There were no significant differences among the treatments in …

Anaerobic Treatment Of Whey Permeate Using Upflow Sludge Blanket Bioreactors, Seokhwan Hwang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Whey permeate was anaerobically digested in laboratory scale upflow anaerobic sludge blanket reactors. Nine hydraulic retention times between 5 and 0.2 days were examined with a fixed influent concentration of 10.6 ± 0.2 g COD/L.

Chemical oxygen demand removal efficiency ranged from 99.0 to 18.9% and maximum production rate of methane gas was 2.67 L/L/day at a hydraulic loading rate of 12.97 kg COD/m³/day. About 70% of the chemical oxygen demand removed was converted to methane.

Both the nonlinear least square method with 95% confidence interval and linear regression were used to evaluate kinetic coefficients. The maximum substrate …

A Study Of Factors Controlling Physical Properties Of Mozzarella Cheese And The Manufacture Of A Reduced Fat Mozzarella Cheese, Richard Kevin Merrill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Variables affecting the physical properties of Mozzarella cheese were investigated. The effects of various milk-clotting enzymes were examined. The type of milk coagulating enzyme used played a significant role in determining physical properties of direct acid Mozzarella cheese. Cook color was not affected by enzyme type, but melt and stretch were significantly affected.

Proteolytic nature of starter cultures was reviewed and recommendation s were give n. Cheese made with proteinase-deficient strains had more stretch after holding for 14 and 28 d than cheese made with non-deficient strains. Cheese made with pairs or single strains of L. helveticus had the same …

The Impact Of Nutrition Education On Dietary Behavior And Iron Status In Participants Of The Supplemental Food Program For Women, Infants And Children, And The Expanded Food And Nutrition Education Program, Nedra K. Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted to determine the impact of nutrition education on participants of the Supplemental Food Program for Women, Infants and Children (WIC) and the Expanded Food and Nutrition Education Program (EFNEP). The specific objectives were to: 1) determine the impact of participation in EFNEP on iron status as assessed by hematocrit (hct) and ferritin levels; 2) determine the effect of nutrition knowledge on hct and ferritin values; and 3) determine the effect dietary behavior has on hct and ferritin levels for both WIC and EFNEP participants.

Each study participant completed a 24-hour dietary recall record plus food frequency …

Sensory And Functional Properties Of Wheat Stored Under Home Conditions, Marilyn M. Shumway

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Samples of wheat that had been stored in homes up to 48 years were collected with information about age and storage conditions. Germination, weight per bushel, protein, moisture, grade, and aroma were investigated. Volumes of gluten balls and bread made from ground whole wheat samples were measured. Sensory attributes of bread were evaluated by Quantitative Descriptive Analysis (QDA) for eight flavor and seven texture characteristics. Because of the tremendous variation in samples, generalizations on cause and effect are difficult to make. No one criterion was a perfect indicator of quality. A high percentage of germination was one of the better …

Effect Of Salinity (Nacl) On Germination, Growth, Ion Accumulation, And Protein Synthesis In Alfalfa (Medicago Sativa L.), Thamir S. Al-Niemi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To study the effect of NaCl stress on gene expression in alfalfa (Medicago sativa L.), greenhouse and laboratory experiments were conducted with 22 cultivars during germination and post-germination growth. The ability of alfalfa cultivars to germinate at the different NaCl concentrations was not related to their postgermination performance (salt tolerance) under those conditions.

Genetic effects were evident for Na and Cl ion uptake and accumulation in alfalfa shoots and roots. The strategies of alfalfa cultivars to cope with NaCl stress includes exclusion of Na from shoots and Cl from roots or from the whole plant depending on cultivar and …

Influence Of The Ruminant Digestive Process On The Germinability Of Range Forage Species, Mohammed S. Al-Mashikhi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ingestion and dispersal of seeds of desirable species by domestic livestock is potentially important as a range improvement practice, but the passage of seed by livestock has only been studied in a fragmented way, particularly for species adapted to rangelands of western North America. The objectives of this research were to examine the effects of different periods of exposure to in vitro and in vivo digestion processes in cattle on the germinability of several grass species, and determine if the in vitro incubation technique is a good predictor of seed fate following passage through the ruminant digestive tract.

Seeds of …

Preliminary Public Health Assessment: Petrochem Recycling Corporation/Ekotek Salt Lake City, Salt Lake County, Utah, Agency For Toxic Substances And Disease Registry, Divisoin Of Health Assessment And Consultation

All U.S. Government Documents (Utah Regional Depository)

The Petrochem/EkoTek site was operated by several owners as a refinery from 1953 until 1978 and as a hazardous waste storage treatment facility and a petroleum recycling facility from 1978 through 1988. Removal of essentially all petroleum products and hazardous wastes in tanks and drums was accomplished from 1988 - 1991. The process that will lead to the complete clean-up of the facility is ongoing. The site was added to the National Priorities List (NPL) in October 1992. Exposure of humans to contaminants in soil and air is thought to have occurred near Petrochem. The source(s) of those contaminants in …

Utah Science Vol. 54 No. 1, Spring 1993

Utah Science

2 Breeding Livestock, Gene by Gene

7 This is No Bull: Sex Changes on Dairy Farms

11 Genetic Engineering for Resistance Against Bovine Virus Diarrhea

13 Better Treatments for a "New" Disease

15 Research in Brief

24 The Caine Dairy Center

28 Ewes Don't Transmit Scrapie to Unborn Lambs

32 New Technique Mean More Calves

34 Construction Slated for New Animal Disease Diagnostic Laboratory

Urinary Calculi: Review Of Classification Methods And Correlations With Etiology, M. Daudon, C. A. Bader, P. Jungers, O. Beaugendre, M. P. Hoarau

Scanning Microscopy

Current physical and chemical methods available for urinary stones analysis are critically reviewed. No one method is sufficient to provide all the clinically useful information on the structure and composition of the stones. We show that a combination of refined morphological and structural examination of stone with optical microscopy, complemented by compositional analysis using infrared spectroscopy of the core, cross-section and surface of calculi, provides a precise and reliable method for identifying the structure and crystalline composition, and permits quantification of stone components while being highly cost effective. Using such morphoconstitutional studies leads to a classification of urinary stones in …

Preparation Of Dinosaur Fossils For Scanning Electron Microscopic Evaluation Of Bone Histology, C. Barreto, R. M. Albrecht

Scanning Microscopy

The quality of preservation is a major determinant of the amount and kind of information to be derived from a paleontological specimen. Various fossilization regimes may produce specimens that contain biological information on a microscopic level. Light microscopic inspection of adolescent fossil dinosaur bones from the Two Medicine Formation (northwestern Montana) revealed that precise preservation of tissue may occur at a cellular level. In the following report, we test and compare techniques of specimen preparation for examination by scanning electron microscopy and illustrate an example of faithful preservation of dinosaur bone histology.

Fungiform Papillae Of The Pig And The Wild Boar Analyzed By Scanning Electron Microscopy, C. A. Chamorro, P. De Paz, J. G. Fernández, L. Anel

Scanning Microscopy

Fungiform papillae of wild boar and pig were studied by scanning electron microscopy (SEM). Four regions were defined on the tongue: rostral, medial and caudal thirds and lateral sides. Morphologically the fungiform papillae correspond with their denomination. Rostral and lateral tongue regions presented the largest average number of fungiform papillae. Taste pores opened onto the upper surface of the papillae and were easily identifiable by SEM. The total number of fungiform taste pores from both animals was the highest reported in the literature. The lateral papillae of wild boar and pig contained the largest average number of pores per papilla. …