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Articles 10891 - 10920 of 13539
Full-Text Articles in Entire DC Network
A Survey And Evaluation Of Shallow Groundwater Contamination Hazards In The State Of Utah, Edward P. Fisk, Calvin G. Clyde
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 …
Plant Protection As A Consequence Of An Ant-Membracid Mutualism: Interactions On Goldenrod (Solidago Sp.), Frank J. Messina
Plant Protection As A Consequence Of An Ant-Membracid Mutualism: Interactions On Goldenrod (Solidago Sp.), Frank J. Messina
Biology Faculty Publications
In central New York, two chrysomelid beetles, Trirhabda virgata and T. borealis, frequently cause severe defoliation of tall goldenrod, Solidago altissima. This plant is also the primary host of Publilia concava (Membracidae), a sap—feeding treehopper that is tended by ants, especially Formica spp. Staged encounters indicate that Formica ants attack adult Trirhabda beetles on goldenrod stems bearing membracids. Such stems escape defoliation by Trirhabda, and show greater mean height increment and seed production than their nearest neighbors without ants. The degree of plant protection depends on the duration of Formica presence. During Trirhabda outbreaks, only stems bearing Formica ants for …
Utah Science Vol. 41 No. 4, Winter 1980
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
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 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 …
Mass Marking Of Mosquitofish: Preliminary Results, Bruce Vondracek, Wayne A. Wurtsbaugh, Joseph J. Cech Jr.
Mass Marking Of Mosquitofish: Preliminary Results, Bruce Vondracek, Wayne A. Wurtsbaugh, Joseph J. Cech Jr.
Watershed Sciences Faculty Publications
Three marking techniques were tested to determine their applicability for mosquitofish. Tetracycline drugs and DC Ar administered in the diet successfully marked laboratory-cultured mosquitofish, but exposure to direct sunlight in outdoor tanks resulted in the rapid disappearance of the marks. Preliminary data on fluorescent marks from a polystyrene pigment in a melamine-sulfonamide-formaldehyde resin forced into the dermal ,tissue with compressed air are more promising.
A t an optimal deliver pressure of 7.3 m Hg (140 p.s.i.) and spraying time of 15 sec., marking percentage is maximized and fish mortality is minimized. Mark retention time was up to 80 days in …
Effect Of Fish Size On Prey Size Selection In Gambusia Affinis, Wayne A. Wurtsbaugh, Joseph J. Cech Jr., James Compton
Effect Of Fish Size On Prey Size Selection In Gambusia Affinis, Wayne A. Wurtsbaugh, Joseph J. Cech Jr., James Compton
Watershed Sciences Faculty Publications
Food size selection of the mosquitofish , Gambusia affinis affinis. was measured in aquaria using juvenile stages of the mosquito, Clllex tarsalb;, as prey. Fish size varied from recently born fry to large adult females. Food size selection was positively correlated with fish size. Mosquitofish fry (6-8 111m standard length) attacked and ate primarily first and second instar larvae. Fry attacked larger instars, but attack success on these was low (0 - 50%). Fish larger than 20 mm attached primarily pupae and third and fourth instar larva. No first instar mosquitoes were eaten. Attack success for these fish was above …
Gametogony And Zygote Formation Of Eimeria Tenella In Cultured Cells And In Chickens, James Westbrook Fisher
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 Biosynthesis Of Delta-Aminolevulinic Acid In Rhodopseudomonas Sphaeroides, Jie Chen
The Biosynthesis Of Delta-Aminolevulinic Acid In Rhodopseudomonas Sphaeroides, Jie Chen
Biology
The activity of two enzymes, delta-aminolevulinic acid (ALA) synthetase and 4,5-dioxovaleric acid (DOVA) transaminase, were determined in crude extracts of three strains of Rhodopseudomonas sphaeroides, (1) a wild type, (2) a mutant strain which can not form chlorophyll without the addition of ALA in the growth medium (known as H5) and (3) a second mutant strain which regained its ability to form chlorophyll without the addition of ALA in the medium (known as H5D). The results show that all three strains have DOVA transaminase activity, while ALA synthetase activity is found only in the wild type. Another experiment utilized D0VA …
Vegetation Of Subalpine And Alpine Moraines In The Teton Range, Grand Teton National Park, Wyoming, John R. Spence
Vegetation Of Subalpine And Alpine Moraines In The Teton Range, Grand Teton National Park, Wyoming, John R. Spence
Biology
The vegetation on the neoglacial deposits below six glaciers in Grand Teton National Park was examined. The deposits at the six sites range from large terminal moraines to steep debris slopes to relatively flat debris accumulations. The sites are characterized by a diversity in topography, climate, and aspect. The environmental millieu the plants are occupying is dominated by disturbance, including mass-wasting, climatic fluctuations, and possible herbivory. One hundred and four species of vascular plants were collected from the six sites. Most of these are typical arctic-alpine species. Transplants of late successional species failed to survive because of dessication, snow kill, …
Spatial And Temporal Changes In Spider Communities, Barbara J. Abraham
Spatial And Temporal Changes In Spider Communities, Barbara J. Abraham
Biology
The spider fauna of a shrub steppe (Artemisia-Agropyron) community at the mouth of Green Canyon, Cache Co., Utah, was described. Herb, shrub and ground stratum spiders were sampled by sweep-netting, beating and pitfall trapping, respectively. Spiders of the ground were generally different from those of the vegetation. The two most abundant spider species and families in each stratum were distinctive. Horizontal distributions of spiders differed in four study plots with vegetation ranging from mostly herbaceous to very shrubby. Seasonal and diurnal spider abundance patterns were noted. Spiders were grouped into guilds based on their predatory strategies. This allowed comparisons between …
Antipredator Behavior And Parental Care In The American Avocet And Black-Necked Stilt (Aves: Recurvirostridae), Tex Albon Sordahl
Antipredator Behavior And Parental Care In The American Avocet And Black-Necked Stilt (Aves: Recurvirostridae), Tex Albon Sordahl
Biology
Free-living American Avocets and Black-necked Stilts were studied during 1977 and 1978 in northern Utah. The broad objectives of the study were to: (1) describe the breeding biology of the birds and identify aspects related to predation pressure, and (2) examine the antipredator behavior of parent birds and their young. Nest success was approximately 30% at 75 avocet and 18 stilt nests studied. Fifty-seven percent of nest failures were due to predation on eggs, and another 11% were due to predation on incubating adults. Juvenal-plumaged broods contained fewer chicks than downy broods, indicating partial brood loss, which was probably due …
Irrigating For Rainbows, Jack Keller
Irrigating For Rainbows, Jack Keller
Faculty Honor Lectures
Quite simply. irrigation is the act of applying water to land. It is usually done to improve plant growth and it lies somewhere between an art. a science. and plain hard work. Even though we do not often think about it. irrigation is very important to the well-being of the world. It is important because we need basic foods to survive. and luxury foods and pleasant views to enjoy this survival. For the many people directly involved in irrigation. especially farmers. it provides a livelihood which is both satisfying and peaceful. And for the few of us lucky enough to …
Evaluation Of A Sensitive Detection Procedure For Sewage-Isolated Reovirus, David N. Ridinger
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
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. …
Common Use Grazing Studies On Southern Utah Summer Range, Al F. Schlundt
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 …
Taxpayer Satisfaction With Public Urban Services In Salt Lake County, Lea J. Cottam
Taxpayer Satisfaction With Public Urban Services In Salt Lake County, Lea J. Cottam
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Although citizens do not generally consider themselves consumers of public services in the same Sense they consider themselves consumers in the retail marketplace, their demand for public services clearly affects what local government units provide. Citizens are involved daily with the consumption of public urban services; yet most consumer education textbooks and teaching materials ignore tax supported services.
The purpose of this study was to measure the satisfaction of consumers with certain public urban services, public officials, and several units of government.
Satisfaction was found to be correlated with age, length of residence in the community and the respondents' attitudes …
Proxemic Behaviors Of Sociometrically Identified Preschool Children, Laura Gaynard
Proxemic Behaviors Of Sociometrically Identified Preschool Children, Laura Gaynard
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
From a population of 160 children, 59 were sociometrically identified into four categories: popular, amiable, isolated, and rejected. Same-sexed pairs of children were then observed in an experimental play situation in which two experimenters, using a computerized event recorder, obtained the amount of time each identified child spent at various distances (0-305 cm) from the confederate. Frequency of moves was also recorded. A general pattern of proxemic behavior for all children, across category, was found to exist in which subjects spent the majority of time at distances of 30.5 cm to 122 cm and very little time at greater distances. …
An Agro-Sylvo-Pastoral Approach To Desertification Control And Increased Productivity Of The Sahel, Rober D. Kirmse
An Agro-Sylvo-Pastoral Approach To Desertification Control And Increased Productivity Of The Sahel, Rober D. Kirmse
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The southern arid fringe of the Sahara Desert, called the Sahel, is progressively becoming less productive through a systematic deterioration of the environment. Population increases and technological advances have encouraged ecological degradation through man's normal activities for survival. The degradation process has been referred to as desertification, desertization, desert encroachment, and desert creep.
Recital Report, Gregory John Wheeler
Recital Report, Gregory John Wheeler
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Two basic ideas underlie the purpose of this recital and report:
(1) There are certain fundamental techniques that a woodwind teacher must employ in his teaching methods. These techniques include: tone production, fingerlings, and articulation, which vary significantly with each of the woodwind instruments. There are many teachers in the field of music education who profess to be skilled on all woodwind instruments, when in fact, their knowledge is limited to one instrument only. With this limited knowledge they attempt to teach techniques and concepts that pertain to all woodwind instruments. Indeed, an educator may have or create many problems …
Evaluation Of Six Strains Of Rainbow Trout (Salmo Gairdneri) Stocked As Fingerlings In Porcupine Reservoir, Utah, Mark Hudy
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Different strains of rainbow trout (Salmo gairdneri), Ten Sleep, Sand Creek, Beitey, Shepherd-of-the-Hills, New Zealand, Fish Lake-Desmet, Desmet, were compared for survival to the creel, growth and catchability after being stocked in a fluctuating 80 ha Utah reservoir. Fish were stocked in the spring and fall as fingerlings and monitored by creel censusing, gill netting and electrofishing. Fish were tagged with coded wire snout tags prior to stocking. An angler opinion survey was conducted to determine angler satisfaction with numbers and size of fish caught.
Regardless of strain, spring stocking was superior to fall stocking in survival to …
Accumulation Of Formaldehyde And Its Relation To Postmortem Aging Of Non-Gadoid Fish Species, Mohamad A. Al-Kanhal
Accumulation Of Formaldehyde And Its Relation To Postmortem Aging Of Non-Gadoid Fish Species, Mohamad A. Al-Kanhal
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Three non-gadoid fish species, trout (Cynoscion regalis), English sole (Paraophyrys vetulus) and Pacific red snapper (Scomber japonicus) have been tested for the recovery of trimethylamine oxide (TMAO), trimethylamine (TMA), dimethylamine (DMA), and formaldehyde (FA) during postmortem storage at 4°C and -5°C. TMAO, TMA, and DMA content was determined by measuring them as the salt derivative of picric acid. FA was determined by using the 3-Methyl-2-Benzothiazolinone hydrazone test.
In muscle tissue of red snapper and English sole, it was clear that initially TMAO decreased during storage at 4°C, while the amounts of TMA, DMA, and …
Variations In Volatiles From Lamb Adipose Tissue, Yn-Mei Chen
Variations In Volatiles From Lamb Adipose Tissue, Yn-Mei Chen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Lamb adipose tissue, representing 4 breeds, 3 sex-types and 3 weight categories, were studied to measure the variation in the flavor profile between individual animals, based on breed, sex- type and carcass weight. The flavor concentrates were prepared by steam distillation, ether extraction and fractionation. Pooled samples were prepared in the same way to measure any variations due to methodology.
Gas chromatographic separation and statistical analysis, based on analysis of variance, indicated that 21 peaks out of 124 peaks showed significant differences (at 5% level or 1% level). Among these 21 peaks, 5 were affected by breed, 4 by sex-type, …
The Effects Of Dietary Calcium And/Or Iron Deficiency Upon Murine Intestinal Calcium Binding Protein Activity And Calcium Absorption, Catherine M. Mcdonald
The Effects Of Dietary Calcium And/Or Iron Deficiency Upon Murine Intestinal Calcium Binding Protein Activity And Calcium Absorption, Catherine M. Mcdonald
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Iron deficiency has been shown to impair calcium absorption, leading to decreased bone mass. Vitamin D3-dependent calcium binding protein (CaBP) has been demonstrated to be necessary for the active transport of calcium in the intestine of numerous species. Iron deficiency might affect the activity of the calcium binding protein.
Four experimental diets were formulated as follows: Diet 1, iron adequate, calcium adequate; Diet 2, iron deficient, calcium adequate; Diet 3, iron adequate, calcium deficient; Diet 4, iron deficient, calcium deficient. Weanling, female rats were separated into 4 groups of 48 animals each and fed the respective diet for a period …
Optimum Enzyme Treatment For Liberation And Assay Of Pantothenic Acid In Blood, Jan Pearson
Optimum Enzyme Treatment For Liberation And Assay Of Pantothenic Acid In Blood, Jan Pearson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A great deal of variability has been evident in reported pantothenic acid blood values. The purpose of the study was to establish optimum enzyme treatment for liberation and assay of pantothenic acid in blood and sera.
There were eight major findings. First, it was found that there was an active pantetheinase in sera, negating the need for hog kidney peptidase or pigeon liver enzyme in whole blood. The second finding (related to the first) indicated that there was significant autolysis of the peptidase bond between the pantothenic acid and cysteamine moieties of coenzyme A in whole blood. The third finding …
The Effects Of A Calcium Pectinate Film Upon Shrinkage, Palatability And Surface Microbial Growth On Carcasses And Selected Beef And Poultry Cuts, Clifford Arthur Stubbs
The Effects Of A Calcium Pectinate Film Upon Shrinkage, Palatability And Surface Microbial Growth On Carcasses And Selected Beef And Poultry Cuts, Clifford Arthur Stubbs
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A process in which low methoxyl pectin is applied to the surface of meat carcasses and poultry to reduce shrinkage, maintain color and improve shelf life was evaluated. A 3.0 percent aqueous low methoxyl pectin (acidified with 1.4 percent acetic acid if required) was applied to beef, lamb and turkey carcasses by spraying and caused to form a gel coating by overspraying with a 3.5 percent calcium chloride salt solution.
Turkey carcasses treated with acidified pectin or acidified pectin after 3.0 percent acetic acid dip for 30 seconds were not significantly improved in shelf life over carcasses which were acid …
Pantothenic Acid Status In An Elderly Population, Nedra K. Christensen
Pantothenic Acid Status In An Elderly Population, Nedra K. Christensen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
There has been insufficient data available for suggesting a recommended dietary allowance for pantothenic acid in the elderly population. The purpose of this study was to determine the average dietary intake of pantothenic acid and correlate it with urinary excretions and the blood levels of this vitamin to assess the pantothenic acid status of the elderly population.
A seven day diet record was obtained from 65 non-institutionalized and 26 institutionalized persons over 65 years of age assessed to be free of chronic diseases. A 24 hour urine specimen and a fasting blood sample was obtained from each study participant. An …
Production Of Mountain Whitefish (Prosopium Williamsoni) In Altered And Unaltered Reaches Of Two Intermountain Streams In Their Alluvial Flood Plains, Michael J. Ottenbacher
Production Of Mountain Whitefish (Prosopium Williamsoni) In Altered And Unaltered Reaches Of Two Intermountain Streams In Their Alluvial Flood Plains, Michael J. Ottenbacher
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Estimates of production and related parameters (growth rate, density, standing crop) were made for populations of mountain whitefish in altered and "unaltered" areas of the Blacksmith Fork and Logan River, Utah from spring 1975 through summer 1976. Capture records of marked whitefish were also analyzed to describe fish movement and check on assumptions implicit in the population estimator.
Mean weights and instantaneous growth rates of whitefish were similar at all sites for comparable size/age groups. Among sites, differences in production per sampling interval and annual production were due mainly to differences in standing crop and/or age structure.
Estimates of mountain …
Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner
Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
During the 1979 breeding season four pairs of northern harriers, or marsh hawks (Circus cyaneus) and four pairs of short-eared owls (Asio flammeus) were studied in Cache Valley, Utah. The study was concerned solely with diurnal resource utilization, and did not examine the owls' nocturnal activities. The home range of each harrier pair overlapped substantially with that of an owl pair. Percent habitat overlap for hawk-owl pairs varied from 39 percent to 72 percent. Observations were made to determine if differences existed in their utilization of habitat and food resources, or in their daily and seasonal …
Effects Of Host Plant Patch Size And Surrounding Plant Type On Insect Population Dynamics, Lynn A. Maguire
Effects Of Host Plant Patch Size And Surrounding Plant Type On Insect Population Dynamics, Lynn A. Maguire
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of the present study was to investigate how plant spatial patterns and insect behavior interact to influence the population dynamics of insects using the plants. The study included three phases: l) field experiments using collards (Brassica oleracea) and the crucifer insect fauna; 2) simulation models representing the population dynamics of an insect herbivore as functions of insect dispersal behavior and host plant patch size; and 3) model-field syntheses integrating model predictions and field variability estimates to choose an appropriate spatial scale for future field experiments or applications.
In field experiments on surrounding plant type, collards were …