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Integrated Pest Management In Rice Culture, Che Salmah Md Rawi

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

Rice, the staple diet of over half of the world population, is grown on about 124 million hectares and occupies almost one fifth of the total world cereal acreage. It is essentially tropical but has also been classified as a subtropical crop. Rich has been cultivated as far nother as 49° latitude and as far south as 35° and is grown from sea level to an altitude of 3,000 meters.

Approval And Disapproval With Children: Limits On The Satiation Phenomenon, Phyllis N. Williamson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research investigated factors that influence the reinforcing or punishing effects of various social stimuli on choice behavior. Previous research has suggested that the extended effectiveness of social reinforcers in modifying behavior is inversely related to the frequency with which they have been administered under noncontingent conditions. The ways in which frequency and contingency may alter the effectiveness of social disapproval had never been previously investigated.

A series of studies was conducted with normal, primary grade children for the purposes of: a) determining the functional relation between verbal stimuli and the child's choice behavior as a consequence of the high …

Parameter Estimation In Nonstationary M/M/S Queueing Models, Pensri Vajanaphanich

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

If either the arrival rate or the service rate in an M/M/S queue exhibit variability over time, then no steady state solution is available for examining the system behavior. The arrival and service rates can be represented through Fourier series approximations. This permits numerical approximation of the system characteristics over time.

An example of an M/M/S representation of the operations of emergency treatment at Logan Regional hospital is presented. It requires numerical integration of the differential equation for L(t), the expected number of customers in the system at time t.

Evaluation Of Low-Temperature Geothermal Potential In Cache Valley, Utah, Janet L. De Vries

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this research was to continue the assessment of the low-temperature geothermal resources of Cache Valley, Utah initiated by the Utah Geological and Mineral Survey. Field work consisted of locating 90 wells and springs throughout the study area, collecting water samples for later laboratory analyses, and field measurement of pH, temperature, bicarbonate alkalinity, and electrical conductivity. Na⁺, K⁺, Ca⁺² , Mg⁺² , SiO₂, Fe, SO₄^-2, Cl^-, F^-, and total dissolved solids were determined in the laboratory.

Temperature profiles were measured in 12 additional, …

Use And Evaluation Of The Nutrient Density Concept For Assessing The Impact Of Socioeconomic Factors On Nutritional Quality Of Diets, Carol Thompson Windham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Data from 7285 individual participants in the USDA Spring Nationwide Food Consumption Survey were analyzed using the nutrient density concept and multiple regression procedures to evaluate the impact of socioeconomic status on the nutritional quality of foods consumed. For each socioeconomic group the average daily amount of nutrients consumed per 1000 kcal of food consumed were computed and compared with the Recommended Dietary Allowances which had been converted to single-value nutrient allowances per 1000 kcal. This nutrient density approach identified qualitative patterns of food consumption for selected income, region, urbanization, household size, race, employment and education groups as well as …

Comparison Of Growth In Preterm, Low-Birth-Weight Infants Fed Human Milk Versus Standard Infant Formula From 40-56 Weeks Postconceptual Age, Laurie Jean Moyer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to compare growth following hospitalization in preterm, low birth weight infants fed their own mother's milk versus preterm, low birth weight infants of similar weight and gestational age given standard infant formula upon demand. Growth measurements were taken 40, 42, 48 and 56 weeks postconceptual age.

A total of 28 healthy, preterm, low birth weight infants completed the study. Seventeen infants received standard infant formula (Similac) and 11 were breast-fed upon demand. Introduction of solid foods was delayed until the infant was greater than 56 weeks postconceptual age. Weight, length, occiptial frontal circumference, mid-upper …

Associative Growth Of Paired Lactic Streptococci In Ph Controlled Whey-Based Media, Carol Lee Hansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study evaluated four lactic streptococcal pairs which had been used routinely in cheese plants to determine (1) if strain growth interactions would produce stimulated growth and acid production; (2) final percent strain ratios and generation times after 1/1 initial inocula volumes and (3) whether final strain ratios could be controlled through adjustment of initial inocula volumes. Strains were propagated in fortified and unmodified whey substrate under pH control at 27C for 12 hours. Cell number and acid activity were evaluated on single and paired strains. Phage typing was used to determine generation times and the percent of each strain …

Seasonal Variation In The Ability Of Milk And Whey To Support Lactic Culture Growth, Rick Cameron Norton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Milk samples from two cheese plants with overlapping milk supplies were collected monthly for one year in an attempt to measure seasonal variation in the ability of milk and whey to support lactic culture growth . Treatments to control and minimize variability of milk or whey were evaluated to optimize stability in starter culture performance.

Raw milk samples were tested for somatic cell counts, activity tests (modified Horrall- Elliker), acid degree values, and total plate counts. Activity (modified Horraii-EIIiker) and inhibitory tests were also performed on pasteurized, pasteurized-vacuumized and high heat milk treatments.

Rennet whey (heated and unheated) was collected …

Variations In The Coagulation Properties Of Milk From Individual Cows, Leslie M. Okigbo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Milk samples from fifty individual Holstein cows at the Utah State University Dairy Farm were tested monthly for 10 months for total protein, casein, fat, somatic cells and pH. A new instrument (Foss Formagraph) was used to measure the coagulation properties of the samples. Simulated cheese making procedures were utilized to measure recovery of fat and protein. All the data were statistically analyzed in relation to individual animals, stage of lactation, number of lactation and milk yield.

Significant variations in clotting time and curd firmness were observed in relation to period of lactation, season, individual cow difference, and milk pH. …

Assay, Purification, And Characterization Of A Pantetheine Hydrolyzing Enzyme From Pig Kidney, Carl Thomas Wittwer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A microsomal glycoprotein hydrolyzing pantetheine to pantothenate and cysteamine has been solubilized and purified to homogeneity as determined by sodium dodecylsulfate electrophoresis. Four rapid, independent assays of pantetheine hydrolysis are described and compared along with a method for localizing enzymatic activity on polyacrylamide gels. The enzyme is solubilized on exposure to butanol and purified by heat treatment, (NH4)₂SO₄ fractionation, hydrophobic chromatography, and hydroxyapatite chromatography. The glycoprotein, purified 5600-fold in 22% yield, has a specific activity of 14 μmoles pantothenate produced/min/mg of protein, 35 times that previously reported. The enzyme has a pH optimum of 9.0-9.5 and a …

An Evaluation Of Deschampsia Caespitosa (L.) Beauv Populations For Metal Tolerances And Ecotypic Variation At Climax, Colorado, Paul Ellsworth Pratt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Four populations of Deschampsia caespitosa (L.) Beauv (a Poaceae species), growing on disturbed and undisturbed sites at Climax, Colorado, were examined for metal tolerances (Zn, Cu, Pb, Al). Root growth assessments on parent plant and offspring material for each population were conducted using nutrient solutions containing elevated levels of Zn, Cu, Pb, or Al. Seed germination and seedling survival tests for each population were conducted on both alpine topsoil and mine spoil material.

Evidence is presented that supports the hypothesis that ecotypic variation exists within Deschampsia caespitosa and that this variation has allowed certain Deschampsia populations to become successfully established …

Estimating Esterase And Monooxygenase Detoxication By Bioassay, Electrophoresis And Metabolic Studies In Pea Aphid, Acrythosiphon Pisum (Harris) Populations (Homoptera: Aphididae), Deifalla H. Al-Rajhi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The role of esterases and monooxygenase in the detoxication vii processes of field populations of pea aphids was studied in relation to seasonal changes, developmental stage, and treatment with DEF and piperonyl butoxide. LCSO values for 12 hour exposure periods in glass vials ra nged from 0.04-2.3 micrograms / vial and 820-4871 J.Jg/vial for paraoxon and carbaryl, respectively. Topical bioassays showed the adults to be more tolerant to paraoxon (LDSO of 1. 4-12.3 ng/aphid) toxicity than nymphs (LDSO of 0.13-4. 7 ng/aphid).

Treatment with DEF® (S,S.S-tributylphosphorotrithioate) enhanced paraoxon toxicity against the pea aphid whereas piperonyl butoxide had little …

Endocrine And Physiological Responses Of The Female Goat During Three Reproductive Phases, Dana Dean Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Female Spanish x Dairy cross goats were divided into three reproductive phases--breeding season or cyclic (20), seasonal anestrus (20), and early postpartum (20). Each group of animals was further divided into three treatments--control (10), Gonadotropin Releasing Hormone (GnRH) treated (5), and pituitary Luteinizing Hormone (LH) (5). During each of the above mentioned reproductive phases, the following were measured: progesterone and LH profiles, serum LH levels following GnRH injection, pituitary LH concentration and ovarian responses following GnRH treatment.

Progesterone levels indicative of luteal development were present only in the breeding season. Progesterone levels during the seasonal anestrous and postpartum periods were …

The Effects Of Stochastic Water Availability On Water Allocations In Utah, Gustavo A. Martinez Gerstl

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A methodology to estimate stochastic surface water flows was developed and applied to a case study area using chance constrained programming model. The results were analyzed as to the effects on different areas of production in Utah.

Effect Of Three Methods Of Processing Barley On Intake And Production Of Lactating Cows, Carlos Garcia Jauregui

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Twenty-four lactating cows were randomly assigned to three treatments within eight each 3 x 3 latin squares with three periods of 21 days duration. Three processing treatments of barley were 1) steam-rolled, 2) ground (fine), and 3) soak-rolled (soaked in water for appr. 24 hours, rolled, and fed within 48 hours). All rations were fed ad libitum and were comprised of 24% alfalfa hay, 16% corn silage, 35.5% barley, 12% whole cottonseed, 12% wheat bran, 0.3% salt, and 0.3% dicalcium phosphate on a dry matter (DM) basis. Electronic doors were used to collect individual feed intake data. Rations and feces …

The Interactive Effects Of Water Salinity And Management On Symbiotic Nitrogen Fixation In Alfalfa, Thomas J. Keck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A greenhouse study was conducted to assess the interactive effects of three irrigation water salinity levels (1.0, 3.0, and 9.0 mmho/cm) and three quantities of water app lied per irrigation (120, 240, 360 ml) on plant growth and nitrogen fixation by alfalfa (Medicago sativa L. cv. Resistador). Harvest dates corresponded to 10, 30, and 50 days after the initiation of salt and water treatments which were started after nodulation had been established in young plants.

Alfalfa top growth was limited by both salt and water stresses. Irrigation water salinity had a greater effect on top growth than root growth …

Habitat Used By Ruffed Grouse In Northern Utah, Judith L. Landry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Vegetation structure of sites used by ruffed grouse (Bonasa umbellus) hens with brood, solitary grouse, drumming males, and nesting hens in northern Utah was measured in 1979 and 1980. Univariate statistical techniques were used to determine general habitat characteristics of each group and discriminant function analysis was applied to the data to differentiate among groups. Most nests were located in maple stands (Acer grandidentatum and A. negundo) with dense tree canopies, low shrubs, and sparse ground vegetation. Drumming logs were most commonly found in densely stocked stands of aspen (Populus tremuloides) mixed with maple or chokecherry (Prunus virginiana) having a …

An Anatomical Investigation Of Roots From C3 And C4 Grasses With Emphasis On Phloem Organization, Eric A. Rechel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Root phloem structure was researched in taxonomically related C3 and C4 grass species. The functional aspect of phloem unloading in the root was then discussed in terms of this observed structure. In Triticum aestivum L. (C3) each phloem bundle consists of one protophloem sieve-tube element, two companion cells, and one metaphloem sieve-tube element. Protophloem sieve-tube elements and companion cells are contiguous with the pericycle. Centripetally the companion cells are in contact with the metaphloem sieve-tube element. All are separated from tracheary elements by stelar parenchyma. Eighty-four percent of the lateral connections observed in protophoem sieve-tube elements are associated with the …

Western White Pine: The Effect Of Clone And Cone Color On Attacks By The Mountain Pine Cone Beetle, Michael J. Jenkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The relationship between clone and cone color in western white pine, Pinus monticola Douglas, to attack by the mountain pine cone beetle, Conophthorus monticolae Hopkins, was studied in the Sandpoint Seed Orchard, Idaho. A positive relationship was shown to exist during a 5 year field evaluation. Cone beetles were found to prefer dark colored cones and to attack certain clones at a higher rate than others.

Laboratory dissections did not indicate that cone color affected oviposition, brood development or brood mortality.

Olfactometer experiments demonstrated that olfactory stimuli are involved in the cone beetle attack sequence. Visual cues relating to cone …

The Influence Of Winter Social Behavior On The Habitat Selection And Reproductive Success Of The Black-Billed Magpie, Kerry P. Reese

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined the influence of winter social behavior, particularly dominance relationships, on the subsequent nesting habitat selection and reproductive success of Black-billed Magpies (Pica pica hudsonia) on 2 areas in northern Utah. Hierarchical cluster analysis ordinated the habitats available to breeding birds and Chi-square and Bonferoni-z statistics were used to determine those habitat types the magpies seemed to prefer. Social status was determined by observing color-banded birds engaged in agonistic encounters at winter bait stations. Social dominance was evaluated by % dyads won, not by total % victories. Relationships between winter social status of magpies and their …

Images And Sequences: A Demonstration Project On The Use Of Photography As A Tool For Academic Motivation In Logan Junior High School, H. Gordon Hilden

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

This is a report of an after-school, non-credit, photo-enrichment course that was developed and offered to students at the Logan Junior High School during the period March 30 through May 6, 1981.

The artistic intent of this course was to teach students how to see with a camera, recording images on transparency film, and later arranging transparencies into idea-development or story-telling sequences.

The educational intent was to see if such a course would motivate students to perform better in other classes and improve their school relationships in general.

The course was of too short a duration to develop any hard …

An Approach To Selection Of Variety And Planting Date In Corn Silage Production, Carlos A. Luna-Gonzalez

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

The major purpose of this study is to make additional information available to the farm manager to improve the decision-making process relating to corn silage production. This study is primarily concerned with factors that influence planting date and variety selection. With-in the framework of decision theory analysis, a Bayesian approach is employed to calculate the best time to plant and the best variety to plant. The approach is used both with and without the possible occurrence of harmful spring frosts. The "seventy growing degree day" method is employed as a criterion for planting date selection. The planting dates are matched …

The Writing And Production Of A Series Of Mini-Documentary Radio Programs On Animal Control And Care In Logan, Camille Cornish-Dryden

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

Human beings have for ages domesticated animals which they have kept for companionship as pets. Originally man and his animals lived on scattered farms and ranches where pets had plenty of room to roam. As human social structures changed and people crowded into towns and cities, the matter of controlling one's pets in order to prevent their becoming the neighbor's pests became a serious concern. Next to fights over water rights in the west, perhaps the most frequent cause for contention was the control of one's pets.

The Relative Importance Of Fathers' Participation In Family Therapy, Alice Ann Smith Aldous

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

The purpose of this paper is to survey research and literature on family therapy to assess what is known currently about contributions of fathers in family counseling. At the same time, theory about fathers' participation in family therapy and his expected contributions to it are summarized here. Because a certain amount of theorizing and speculation are involved, the major question of this paper will be narrowed to avoid moving too far from the known. The main question will be the importance of the father's participation relative to his nonparticipation. Questions of the significance of the father's involvement relative to his …

Seed Case Studies On Atriplex Gardneri (Moq) Dietr.: Bracteole Cell Wall Composition And Enzymatic Degradation, Priscilla Woolley Burton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Clarification of the bracteole restraint on germination and the development of an improved seed pre-treatment were the objectives of this study. Bracteole cell walls were isolated and hydrolyzed with 72% sulfuric acid followed by dilution and further hydrolysis. Individual monosaccharide yields were monitored with gas chromaixtography and colorimetry. Lignin was determined as the acid insoluble residue . Cell wall composition on a dry weight basis was 17.0% lignin, 32 . 75% glucose, 28.77% xylose, 7.21% arabinose, 1.11% galactose and 0.35% mannose. Linear xylans and glucans represent a large portion of the cell wall . The quantity of lignified tissue is …

Genesis Of A Vertisol And An Associated Palexeroll In Northern Utah, Robert C. Graham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The genetic relationship between a Vertisol and an associated Mollisol with an argillic horizon was studied. These soils are taxadjuncts of the Hawkins and Ostler series, respectively. They occur in the Wasatch Mountains of northern Utah and have similar parent materials, altitudes, and slope percentages. Ostler soils have a dense cover of Gambel oak (Quercus gambelii) and occur preferentially on north aspects. Mule's ear (Wyethia amplexicaulis) is the dominant vegetation on Hawkins soils, which are most frequent on south aspects. Erosion is prevalent on Hawkins soils because the mule's ear does not adequately cover the soil …

Evaluation Of The Utah Operational Weather Modification Program, Geoffrey E. Hill

Reports

This study is an evaluation of a winter orographic cloud seeding project in Utah. The evaluation is based upon both intensive field measurements and historic~l records. For the field measurements, ground and airborne data were collected during February and March, 1981 in the vicinity of the Tushar Mountains. In evaluating the physical data three aspects are emphasized: the dispersal of artificial ice nuclei, the distribution of supercooled liquid water, and the growth and trajectories of precipitation. Ground based measurements were made by K and X band radars, a dual frequency microwave radiometer, a network of precipitation gauges, an ice nucleus …

Gas Team 1b, Utah State University

Research

This is the a scanned image of the GAS team's purpose and teammates. It details the goals of the project, and the students, faculty and staff across the state of Utah who particpated in the project.

Utah Science Vol. 43 No. 1, Spring 1982

Utah Science

1 GRAZING FEES FOR PUBLIC LANDS: WHAT'S FAIR? D. B. Nielsen Formulas and fees help set the price of beef. They also are factors in rancher survival rates. Learn how the process works in this article.

7 BUR BUTTERCUP: A WEEDY IMMIGRANT M. E. Barkworth Whys and hows of plant transfers between regions and countries are solved by special detective work. A USU scientist wants to help in keeping track of Bur Buttercup migrations.

10 BUR BUTTERCUP: IT WILL GET YOUR SHEEP IF YOU DON'T WATCH OUT J. D. Olsen, T. E. Anderson, and G. Madsen Although not a true …

Analytical Scanning Electron Microscopy For Surface Science, Olive Lee-Deacon, Claude Le Gressus, Daniel Massignon

Scanning Electron Microscopy

To correlate an electron image with surface properties requires thorough understanding of electron-solid interaction, secondary electron emission mechanism and operation functions of image detectors. We emphasize the importance and usefulness of combining electron spectroscopy with scanning electron microscope in interpreting electron image contrast. Linear relationships among secondary electron image (SEI) brightness, total emission current and the integration of electron energy distribution were measured. We propose that channeling effect, instead of primary electron diffraction, is the crystallographic cause of SEI contrast. Secondary electrons contribute most to SEI brightness because of their high constituent in total yield, not because of high efficiency …