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The Effects Of Myoglobin, Nitrosylmyoglobin, And Free Iron On The Growth Of Clostridium Botulinum In Cured Meat, Susan K. Fortier Collinge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although nitrite is a known inhibitor of Clostridium botulinum in cured meats, the mechanism of inhibition is not understood. The observation has been made that iron is required for growth of C. botulinum and that the role of nitrite may be to alter the pathway of iron uptake by these organisms. Since the color change in cured meats is due to the binding of nitrite to the heme group of meat pigments, it was hypothesized that nitrite may also be tying up an essential iron source, heme. This experiment was an investigation of the possibility that myoglobin added to a …

Factors Affecting The Measurement Of Undenatured Whey Protein Nitrogen In Dried Whey By A Modified Harland-Ashworth Test, Reyad M. Aboumahmoud

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Harland-Ashworth test for measuring undenatured whey protein nitrogen in nonfat dry milk was modified to measure undenatured whey protein nitrogen in dried whey. The new test was designed to measure absorbance in Harland-Ashworth filtrates at 280 nm to eliminate difficulties associated with turbidimetric measurements. One gram dried whey was reconstituted in 25 ml pH 6.7 phosphate buffer (.1M) in a 25 x 150 mm test tube. Ten grams sodium chloride were added. The test tubes were incubated for 30 min in a water bath at 37C and shaken 8-10 times in the first 15 min. The tubes were removed …

Comparison Of Skim Milk Starter, Whey Base Starter And A Direct Set Method On The Yield, Quality And Economics Of Cottage Cheese Production, Wayne G. Geilman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three different methods of acidifying skim milk(milk starter, whey base starter and direct acid set) for making cottage cheese were evaluated for their effect on yield, quality and acidification cost. Cultured cottage cheese was produced with milk starter and pH controlled whey-base starter by the short set method. Five percent milk starter and 2.4% whey base starter were approximately equivalent in activity and gave average setting times of 234 to 255 minutes. Direct acid set cottage cheese was made by the Vitex/American method. The setting time required for direct acid set cottage cheese was 158 minutes. Yields of cottage cheese …

Vitamin A And Vitamin E Status Of Persons On Hemodialysis, Kathleen S. Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study was designed to assess the vitamin A and vitamin E status of persons receiving maintenance hemodialysis. Blood samples from thirty persons receiving hemodialysis, as well as age and sex-matched controls, were analyzed for vitamin A, vitamin E, and carotene using a spectrofluorometric assay for vitamins A and E, and a spectrophotometric assay for carotene. Dietary intakes of vitamins A and E were estimated via verbal questioning. Samples of dialysate were also studied. Results of the investigation showed significantly elevated vitamin A, normal vitamin E, and decreased carotene levels in persons with renal failure receiving maintenance hemodialysis, when compared …

The Effect Of Parent Involvement In A Nutrition Education Program For Primary Grade Pupils, Barbara A. Kirks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three schools were matched for socioeconomic data, location, and quality. Students in kindergarten through grade three in two schools received nutrition education; the third school was the control. Of the two treatment schools, one was randomly assigned to receive parent as well as student education in nutrition. Three-hundred and seventy cognitive scores, 168 affective scores, and 100 plate-waste analyses were collected in both pretest and posttest phases. At the end of the four-month treatment period, 24-hour food frequency recalls were collected for 151 children.

Students at the school where both parents and their children were involved had higher dietary quality …

Fall Regrowth Of Crested Wheatgrass And Fourwing Saltbush, Noor Mohammad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During 1980-81, studies with crested wheatgrass (Agropyron desertorum) and fourwing saltbush (Atriplex canescens) were conducted in controlled environment growth chambers as well as under field conditions to achieve the following objectives:

1. To determine the effect of nitrogen fertilizer on the water use efficiency.

2. To determine the effects of various temperature, water stress and nitrogen treatments on the productivity, nitrogen content and carbohydrate reserves.

3. To determine the effects of N fertilization on fall and spring regrowth.

Crested wheatgrass and fourwing saltbush plants were maintained in three growth chambers for 60 days under three temperature …

The Energy Expenditure Of Heifers Grazing Crested Wheatgrass Rangeland In West-Central Utah, Kris M. Havstad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The free-roaming ruminant requires energy for the demands of vii grazing, traveling and thermoregulation that are not required by its confined counterpart. Literature estimates of these additional costs range from 10 to 170 percent above maintenance. The uncertain magnitude of this increased demand and the factors that contribute to it impede the ability of the rangeland ruminant nutritionist to establish guidelines for the energy requirements of the free-roaming herbivore. This study was designed to estimate the energy expenditure of yearling Angus heifers while grazing a declining supply of available crested wheatgrass forage (Agropyron cristatum) on rangeland in west-central …

Seasonal Temperature Preference Of Adult Mountain Whitefish, Prosopium Williamsoni, Jean M. Ihnat

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Temperatures selected seasonally by adult mountain whitefish were measured in the laboratory in a horizontal gradient. Final preferendum estimates, based on acute (3-hour) preference tests conducted with fish acclimated to 5, 10, and 15 C each season, were 17.7 C (pre-spawning), 11.9 C (post-spawning), 9.9 C (winter), and 16.3 C (spring). Seasonal influence on temperature selection was evident on the basis of differences in final preferenda, covariance analysis of responses of laboratory-acclimated fish, and temperature selection by fish held at ambient river temperatures. Post-spawning and winter groups selected lower temperatures than did pre-spawning and spring groups. Pre-spawning fish selected temperatures …

Some Morphological And Chemical Responses Of Blackbrush (Coleogyne Ramosissima) To Goat Browsing: Influences On Dietary Blackbrush Selection By Goats And Cattle, Frederick D. Provenza

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Domestic goats were used to modify the growth form of blackbrush, a spinescent shrub occurring in nearly monospecific stands on several million hectares of rangeland in the southwestern United States. The objective of this research was to evaluate goat browsing as a means of improving these rangelands for cattle. Winter goat browsing stimulated spring twig growth from basal and axillary buds which resulted in increased production.

Twig production by heavily browsed plants (>95 percent removal of current season's twigs) was a function of precipitation, soil depth, branch location on the plant, and period of rest after browsing. As precipitation …

Natural Pastures Of The Macquarie Region Of New South Wales: Their Origin, Composition And Management, David Leslie Michaelk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two experiments were conducted in the semi-arid (400 millimeter annual rainfall) Macquarie region of New South Wales, Australia, at the Trangie Agricultural Research Station (31° 59'S; 147° S7'E), to examine (a) the way botanical parameters can be used to separate grazing and climatic impacts on range vegetation, and (b) how this delineation affects application of range science tenets (site, condition and trend) to different pasture types.

Two range sites were studied: Site 1, a light soil type, was dominated by annual grasses, legumes and forbs, whereas perennial grasses (mainly Chloris acieularis and Chloris truncata) dominated the heavy soils of …

Investigations On The Great Northern Beans (Phaseolus Vulgaris L.): Protein Functionality, Antinutrients, Flatus Factors, Fermentation, And Carbohydrates, Shridhar K. Sathe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Protein content of the Great Northern beans was 26.10 percent on a dry weight basis. The apparent isoelectric pH of the NaCl extractable proteins was about 4.4. Among the several solubilizing agents, Na₂CO₃, K₂SO₄, sodium dodecyl sulfate (SDS), and NaOH at the respective concentrations of 0.5, 5.0, 5.0 (all w/v), and 0.02 N were the best protein solubilizing agents, solubilizing 93.6 grams Lowry protein per 100 grams Kjeldahl protein. AIbumins and globulins accounted for 21.18 and 73.40 percent, respectively, of the total bean proteins. The bean proteins were fractionated and protein concentrates …

An Economic Analysis Of Farm Flock Sheep Production In Utah, Ken Beck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to evaluate the economic aspects of farm flock sheep production in Utah. Using 1979 as a base year, costs and returns were calculated from data obtained from twenty- six Utah farms. Characteristics that typify the states· farm flock sheep production, at this writing, with regard to: 1) the farm flock producers and 2) the farm flock enterprise, were presented.

Various models were dev eloped and examined using Multiple Regression and Linear Programming analytical techniques. Multiple Regression was us ed to estimate the effects that different variables had on the profitability of the sheep enterprise. …

Effect Of Rain Leaching On Chemical Composition Of Alfalfa Hay, Mercedes M. Garcia De Hernandez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Yield and chemical changes of second-cutting alfalfa hay treated with artificial rain were determined in a 2 x 3 x 2 factorial experiment. Factors were 2 stages of maturity (1 = late vegetative; 2 = early bloom), 3 levels of artificial rain applied (1 = no rain; 2 =low or approximately 5 mm; 3 = high or approximately 20 mm), and 2 times of applying artificial rain (1 = when drying forage was 40-60% dry matter; 2 = when drying forage was 60-75% dry matter). Thirty samples of alfalfa were collected at the 2 stages of maturity when the alfalfa …

The Interactions Of Electrical Conductivity, Sodium Adsorption Ratio, Water Volume And Rhizobial Strain On Phaseolus Vulgaris L., David A. Anderson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A greenhouse experiment was conducted to determine the interactive effects of water salinity, volume of water applied at each irrigation, sodium adsorption ratio and rhizobial strain upon 15 plant growth parameters of Phaseolus vulgaris L. Four levels of water salinity (EC_W 0.4, 3.0, 6.0, or 9.0 mmho/cm), three levels of water volume (200, 400, or 800 ml per pot), three levels of SAR (4, 16, or 64) and three strains of Rhizobium phaseoli (K-17, K-47, or K-52) were used. The treatments were replicated with all possible combinations. Data were subjected to analysis of variance, multiple comparisons, and path coefficient …

Fertility And Saline Water Management Interactions On Plant Growth And Nitrogen Fixation In Phaseolus, Robin R. Drysdale Rodriguez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A greenhouse study was conducted involving interactive effects on bean yield of three levels of irrigation water salinity, three frequencies of irrigation water app li cation, two level s of nitrogen, and seven levels of phosphorus fertilization to determine if the effects of adverse saline conditions or water stress could be overcome by fertility and/or saline water management.

Dry matter and bean yields were reduced with decreasing irrigation frequency (2 days to 8 days) and increasing salinity of irrigation water (0.5 mmho/cm to 8.0 mmho/cm). At low salinity levels (0.5 mmho/cm) dry matter production and the number of pods per …

Utah Science Vol. 42 No. 1, Spring 1981

Utah Science

1 INTRODUCTION Stanford Cazier

2 INTERNATIONAL PROGRAMS AT USU (1915-1981) N. Keith Roberts USU's commitment to helping less affluent peoples help themselves began in 1915. Over the years. that commitment has led to Increasingly diversified but consistently useful work

6 WHO BENEFITS FROM INTERNATIONAL PROGRAMS? E. Boyd Wennergren Altruism has a noble sound to It. but practical considerations often keep us from embracing the philosophy. Economical data. however. prove that when we go to less developed countries to fight world hunger. we gain measurable benefits for ourselves

10 DEVELOPMENT ECONOMICS N. Keith Roberts and Morris D. Whitaker Valid. long-range cost/benefit …

Wild Ungulate Forage Requirements -- A Review, United States Bureau Of Land Management

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

This report discusses the nutritional and intake requirements of the major big game ungulates of North America. Forage intake rates for the various species are detailed, and major factors governing intake rates are discussed. The importance of forage nutritional value as much as quantity is emphasized, and both biotic and abiotic factors influencing forage quality are presented. Methods of forage protection and improvement are briefly defined.

Longitudinal And Seasonal Changes In Functional Organization Of Macroinvertebrate Communities In Four Oregon Streams., Charles P. Hawkins, J. R. Sedell

Watershed Sciences Faculty Publications

Relative numerical dominance and densities of invertebrate functional feeding groups are compared with longitudinal and seasonal changes in food resources in a Cascade Range stream system in Oregon. We also compare our data with hypothetical predictions of the River Continuum model. We found that both relative abundances and densities of functional groups fit qualitative characterization of stream reaches and the River Continuum model: Shredders dominated upper shaded reaches; scrapers were most important in intermediate—sized sections; collectors increased in importance progressively downstream; predators were nearly constant in relative abundance at all sections; other functional groups were either rare or only locally …

A Survey And Evaluation Of Shallow Groundwater Contamination Hazards In The State Of Utah, Edward P. Fisk, Calvin G. Clyde

Reports

A survey was made to appraise current man-made contamination of shallow groundwater in Utah. Very little has been published on the subject, and most of the information was obtained by personal observation and through interviews of individuals concerned with water quality protection in Utah. After presenting the relevant physiographic, geologic, and hydrologic characteristics of the various regions of Utah and discussing how these relate to groundwater contamination in general, representative groundwater quality hazards in 32 sites or regions in Utah are presented. A very wide range of hazards to groundwater quality was found to exist. These cases cover the range …

Utah Science Vol. 41 No. 4, Winter 1980

Utah Science

105 WATER RIGHTS: CAN THEY BE BROKERED? Jay M. Bagley, Kirk R. Kimball, and Lee Kapaloski Active and complex water markets create problems for individuals and corporations alike in transferring and selling water rights or merely buying and selling the water itself. USU scientists believe a water rights brokerage service could simplify procedures and consolidate vital information.

108 FOOD AND NUTRITION PATTERNS IN THE U.S. Bonita W. Wyse, Carol T. Windham, and R. Gaurth Hansen The goal of analyzing consumer consumption patterns is to better understand what the American public is eating and what implications this has for national health. …

Iron And Life, Thomas Emery

Faculty Honor Lectures

Iron, iron, everywhere but. . . . The plight of the ancient mariner surrounded by undrinkable water could hardly have been more frustrating than life on earth with respect to iron. Iron is the fourth most abundant element of the earth's surface, exceeded only by oxygen, silicon, and aluminum. Virtually all forms of life from the simplest bacteria to humans require iron to catalyze numerous and complex metabolic reactions. Because of the diversity and complexity of the role of iron in the life process, it has even been suggested that the origin of life on earth centered around the catalytic …

Utah Science Vol. 41 No. 3, Fall 1980

Utah Science

71 TRAMPLING EFFECTS ON RANGELANDS Gerald F. Gifford and Manouchehr Dadkhah Protection of topsoil is the key to watershed management. Results show that this can be accomplished with a 50 percent protective ground cover. Degrees of trampling on various ground covers on different soils and slopes are compared.

74 SLUDGE-A WASTE OR A RESOURCE? Raymond W. Miller and Rex S. Spendlove Long considered unusable, sewage sludge is being studied for use as a crop fertilizer with definition of its possible consequences and benefits.

78 BEETLE KILL IN THE LODGEPOLE PINE Richard G. Ballard, Michael A. Walsh, and Walter E. Cole …

Utah Science Vol. 41 No. 2, Summer 1980

Utah Science

37 SYMBIOSIS-A MARRIAGE OF CONVENIENCE W. F. Campbell, C. Barnes, and D. C. lanson A type of bacteria that lives in the roots of legumes converts nitrogen from the air into a form useable to host plants, and may aid in revegetating strip-mined lands.

40 ALCOHOL FUEL FROM SUGARBEETS D. L. Doney and J. C. Theurer Sugarbeets, once a major crop in Utah, may regain acreage as a possible source of fuel to supplement our increasingly expensive petroleum.

44 OIL SHALE-POTENTIAL RESOURCE AND POSSIBLE ENVIRONMENTAL PROBLEM R. J. Wagenet, D. F. Fransway, and C. M. McKell The development of Utah's …

Gametogony And Zygote Formation Of Eimeria Tenella In Cultured Cells And In Chickens, James Westbrook Fisher

Biology

Although life cycles of many coccidian parasites are well documented, the exact sequence of events involved in the process vii of micro- and macrogamete encounter and subsequent zygote formation have remained poorly understood. The purpose of this investigation was to characterize the fertilization process of Eimeria tenella. Excysted sporozoites of Eimeria tenella were inoculated into Leighton tube cultures of primary chicken kidney cells and allowed to develop through oocyst formation. Additionally, sporulated oocysts of E. tenella were administered to young coccidia-free chickens. Infected cell cultures and cecal epithelium were processed for electron microscopy. Observations were also made on living infected …

The Effects Of Sucrose Concentration And Prolonged Darkness On Sieve-Element Ontogeny In Experimentally Grown Lemna Minor L., Julie Mitchell Palmer

Biology

An investigation of sieve element development in roots of Lemna minor L. was made under conditions of prolonged darkness and sucrose supplemented media. As a prelude to this study several small experiments were performed to determine whether or not sucrose in the nutrient solution is actually absorbed by the plant. Results of the dry weight analysis and osmotic values of nutrient media indicated that sucrose uptake does occur. In the prolonged darkness experiment, evidence was obtained that suggested better preservation of tonoplasts and smooth endoplasmic reticulum occurred in sieve elements that have a lowered solute concentration due to deprivation of …

Evaluation Of A Sensitive Detection Procedure For Sewage-Isolated Reovirus, David N. Ridinger

Biology

MDBK,LLC-MK2 and Intestinal 407 were the most susceptible cell lines respectively in a comparison study using 12 continuous cell lines and reovirus serotypes 1, 2, and 3 isolated from sewage. In a similar study, MDBK cells, when compared to LLC-MK2 and BGM cells, were the most susceptible to sewage isolated, protamine precipitated reovirus, which had not been serotyped and had no previous cell contact. Sewage-isolated, protamine-precipitated reoviruses were also used in conjunction with MDBK cells in a comparative evaluation of immunofluorescent cell count (ICC) and a plaque assay procedures. The ICC assay detected higher reovirus titers in 18-24 hrs, considerably …

Effects Of Ddt Upon The Hematology And Immunology Of The Goldfish (Carassius Auratus), Maurice G. Zeeman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

DDT can cause hematological and immunological alterations in mammals and birds. Interference with normal hematological and immunological defense systems has been strongly linked to increased incidences of disease and tumors. Fish exposed to pesticides have been noted to be more susceptible to disease. This study examined DDT effects on goldfish hematological and immunological parameters.

Adult goldfish were kept in 250 liter aquaria at 25 ± 1° C. Fish were dosed intraperitoneally with p,p'-DDT in corn oil. Doses ranged from 0 to 500 mg/kg for acute (96 hour) hematology studies to 0 to 50 mg/kg for sub-acute hematology and immunology studies. …

Utah Employer Attitudes Towards Sponsoring Day Care For Employees, Diane Hart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purposes of this study were to: 1) examine and contrast hospital administrator attitudes and manufacturing company president (or manager) attitudes in relation to the possibility of having more Utah employers establish organized day care facilities on sites of employment, and 2) determine which factors of employee composition and available facilities and services affect employer attitudes towards day care involvement.

Information from the questionnaire developed for the study was statistically analyzed by the Pearson r correlation coefficient and one-way analysis of variance. Many factors proved to be statistically significant.

Overall, it was found that hospitals were more interested in day …

Common Use Grazing Studies On Southern Utah Summer Range, Al F. Schlundt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two common use grazing trials were conducted during two summer grazing seasons (1978-1979) on a typical shrubby grassland site on the Kolab Terrace, about 20 miles (32 km) southeast of Cedar City, Utah, at an elevation of about 8500 feet (2600 m). Two animal units of ewes with lambs, or cows with calves, or both were stocked in each of six, one-acre (0.39 ha) pastures. A five to one substitution ratio provided two single-species and one mixed (five ewes with lambs and one cow with calf) livestock treatments replicated twice. The pastures were grazed for nine days during which time …

Involving Parents In A Nutrition Education Program For Preschool Children, Cheryl Wright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary intent of this study was to ascertain the effectiveness of parents in the role of teaching nutrition to their children. This research endeavor was an extension of refinement of a three-year program in nutrition education in the Department of Family and Human Development at Utah State University. Fifty-seven children enrolled in the Child Development Laboratory at Utah State, and their parents were involved in the study. Eighteen children were taught nutrition by their mothers. Twenty-one children were taught nutrition by their mothers and fathers, and 18 children served as the control group and received no nutrition using an …