Digital Commons Network^™

Improving Seed Germination Of Salicornia Rubra (Chenopodiaceae) Under Saline Conditions Using Germination-Regulating Chemicals, M. Ajmal Khan, Bilquees Gul, Darrell J. Weber

Western North American Naturalist

Salicornia rubra Nels. (Chenopodiaceae) is a salt-tolerant annual species occurring in salt playas of the Great Basin desert in western United States. It forms pioneer communities on the most saline location of an inland salt playa at Goshen, Utah. Seeds of Salicornia rubra are capable of germinating at 1000 mM NaCl at 25–35 °C alternating temperature regime. Dormancy-regulating chemicals were evaluated for their ability to alleviate the innate and salinityenforced dormancy in seeds of Salicornia rubra. Betaine, GA3, kinetin, fusicoccin, ethephon, thiourea, proline, and nitrate had no effect in alleviating primary dormancy. Increases in NaCl concentration progressively inhibited germination …

New Records Of The Mogollon Vole, Microtus Mogollonensis (Mearns 1890), In Southwestern Colorado, Jennifer K. Frey, J. Jeffrey Root, Cheri A. Jones, Charles H. Calisher, Barry J. Beaty

Western North American Naturalist

No abstract provided.

Full Issue, Vol. 62 No. 1

Western North American Naturalist

No abstract provided.

Full Issue, Marriage &. Families

Marriage and Families

No abstract provided.

Finding The Extraordinary In The Ordinary, Jenifer J. Call

Marriage and Families

No abstract provided.

Temple And Cosmos: Beyond This Ignorant Present, Hugh Nibley

Maxwell Institute Publications

In Temple and Cosmos, Brother Nibley explains the relationship of the House of the Lord to the cosmos. In Temple, the first part of the volume, he focuses on the nature, meaning, and history of the temple, discussing such topics as sacred vestments, the circle and the square, and the symbolism of the temple and its ordinances.

In the second part, Cosmos, he discusses the cosmic context of the temple-the expanding gospel, apocryphal writings, religion and history, the genesis of the written word, cultural diversity in the universal church, and the terrible questions: Where did we come from? Why are …

Full Issue

Quidditas

No abstract provided.

Integrating Water Quality Modeling With Gis To Determine Management Strategies: A Study Of Fort Gordon, Ga

Journal of Spatial Hydrology

Land managers of the Fort Gordon military installation in Augusta, GA were in need of a tool which would predict the effects to water quality produced by changes in land use as well as predict impacts of existing land use condition to the quality of water on and leaving the installation. Over the past ten years many studies have evolved which provided differing levels of integration between water quality models and geographic information systems software. The Hydrologic Unit Water Quality Tool is a software package developed by NRCS employees in Ft. Collins, Colorado, which provides an intermediate integration between AGNPS …

Slab-Geometry Molecular Dynamics Simulations: Development And Application To Calculation Of Activity Coefficients, Interfacial Electrochemistry, And Ion Channel Transport, Paul S. Crozier

Theses and Dissertations

Methods of slab-geometry molecular dynamics computer simulation were tested, compared, and applied to the prediction of activity coefficients, interfacial electrochemistry characterization, and ion transport through a model biological channel-membrane structure. The charged-sheets, 2-D Ewald, corrected 3-D Ewald, and corrected particle-particle-particle-mesh (P3M) methods were compared for efficiency and applicability to slab-geometry electrolyte systems with discrete water molecules. The P3M method was preferred for long-range force calculation in the problems of interest and was used throughout.

The osmotic molecular dynamics method (OMD) was applied to the prediction of liquid mixture activity coefficients for six binary systems: methanol/n-hexane, n-hexane/n-pentane, methanol/water, chloroform/acetone, n-hexane/chloroform, methanol/ …

Determination Of Protein Profile And Presence Of Antibodies In Llama Seminal Plasma (Llama Glama), Francisco Flores Lópes

Theses and Dissertations

Internationally, Bolivia has the largest llama population followed by Peru. This makes our country a power in this renewable resource for working and generating economic development. This is mainly because of the quality of llama meat, which has nutritional properties superior to other animal species. The development and research in our country of llamas is not very significant. But in other countries advanced studies have been done for years, specifically in the area of reproduction, which represents problems for intensive repopulation because of singular characteristics of semen and copulation. The present research work was done at the UAC in Tiahuanacu …

Creation Of Three Nutritional Mixes Based On Amaranth (Amaranthus Caudatus) And Other Andean Crops For School-Aged Children (Cochabamba-Bolivia), Sandra Carola Delgadillo Barriga

Theses and Dissertations

In Bolivia we have three very valuable Andean grains: amaranth (Amaranthus caudatus), quinoa (Chenopodium quinua), and canihua (Chenopodium pallidicaule), which combined with cereals and legumes can become a complete and balanced food in order to combat the malnutrition that is so widespread in our region. In this study, various nutritional mixes were formulated, based on amaranth and other Andean crops, and the three best were chosen according to nutrition, palatability, and cost. They were: Andean Baby Food, Mixicereal, and Amaranth Cookie, which have an amino acid complement between 79% and 100% and give satisfactory amounts of protein, energy, and minerals …

Review Essay: Richard Utz. Chaucer And The Discourse Of German Philology: A History Of Reception And An Annotated Bibliography Of Studies, Anita Obermeier

Quidditas

Richard Utz. Chaucer and the Discourse of German Philology: A History of Reception and an Annotated Bibliography of Studies, 1793–1948. Making the Middle Ages 3. Turnhout: Brepols, 2002. xxi + 446 pp.

The Demonization Of Sidney’S Cecropia: Erasing A Legal Identity, Stephanie Chamberlain

Quidditas

In October fo 1533, fourteen-year-old Catherine de' Medici married Henri, duc d'Orléans in a union meant to secure a favorable political alliance between Francis I, the King of France and Pope Clement VII, her uncle and legal guardian. When, however, the Pope unexpectedly died less than a year later, Catherine’s symbolic worth virtually died as well: leaving a less than enamored France to bear the burden of one whose status, as R. J. Knecht has noted, “was immediately reduced to that of a foreigner of relatively modest origins.”1 When Henri unexpectedly died following a ceremonial jousting match in 1559, Catherine …

Application Of A Rational Model In Gis For Flood Risk Assessment In Accra, Ghana

Journal of Spatial Hydrology

Accra has been experiencing periodic flooding that affect properties and lives. The government seeing the dangers involved has commissioned institutions such as Ministry of Works and Housing, Town and Country Planning and City Engineers to identify flood risk zones and adapt measures that will help reduce flood damages. These institutions identify flood risk zones using conventional methods such as watermarks on buildings and reported cases in the news media. Works carried out by these agencies were not able to give details about potential areas that are likely to experience this extreme event. Hence there was the need to find a …

A Comprehensive Gis-Based Modeling Approach For Predicting Nutrient Loads In Watersheds

Journal of Spatial Hydrology

A comprehensive, GIS-based modeling approach was developed to enable accurate prediction of nutrient loads in watersheds throughout the state of Pennsylvania; particularly those watersheds for which stream monitoring data do not exist. This approach relies on the use of statewide GIS data sets for deriving reasonably good estimates for various critical model parameters that exhibit considerable spatial variability within the state. Data manipulation and subsequent simulation modeling is managed via an interface (called AVGWLF) between a popular desktop GIS software package (ArcView) and the Generalized Watershed Loading Function (GWLF) model. The modeling approach was tested in thirty-two (32) watersheds throughout …

Motivations And Gratifications For Selecting A Niche Television Channel: Byu Television, Diena L. Simmons

Theses and Dissertations

The growth of direct broadcast satellite television distribution to the home as a viable competitor to cable and terrestrial broadcast has fostered the availability of special interest or niche channels and therefore provided greater choice to the viewer. This study, based on uses and gratifications theory, examined the relationships among ritual and instrumental viewing motivations and satisfactions, viewer religiosity, and viewing attentiveness as they related to the selection of a niche television channel, Brigham Young University Television.
The uses and gratification approach provides an appropriate framework for studying "media consumption, the interrelated nature of television user motives, and the relationships …

Bringing Online Learning To Campus: The Hybridization Of Teaching And Learning At Brigham Young University, Gregory L. Waddoups, Scott L. Howell

Faculty Publications

The primary purpose of Brigham Young University (BYU) is to provide students with a combination of sacred and secular education often described as the BYU experience. Achieving this purpose is challenged by the rapid growth in Church membership and an enrollment cap of 30,000 students. To address these challenges, BYU sponsors the use of technology to bridge the gap between the increased Church membership and the number of students allowed under the enrollment caps. This institutional case study shows how these challenges have influenced the hybridization of teaching and learning for on campus (resident) and off campus (distance) students. It …

Parental Psychological Control: Implications For Childhood Physical And Relational Aggression, David A. Nelson, Nicki R. Crick

Faculty Publications

Children who experience difficulties with peers also tend to experience both concurrent social–psychological difficulties and long-term negative developmental outcomes. Specifically, a significant amount of research has identified peer rejection and isolation as significant precursors to academic troubles and socially deviant behavior (DeRosier, Kupersmidt, & Patterson, 1994; Kupersmidt, Coie, & Dodge, 1990; Parker & Asher, 1987; Parker, Rubin, Price, & DeRosier, 1995). Substantial research and intervention efforts have consequently been dedicated to an understanding of the problem behaviors commonly identified as correlates or antecedents of peer rejection. Childhood aggression is one of the most significant predictors of peer rejection, and has …

Manipulation Of Prenatal Hormones And Dietary Phytoestrogens During Adulthood Alter The Sexually Dimorphic Expression Of Visual Spatial Memory, Edwin D. Lephart, Trent D. Lund

Faculty Publications

In learning and memory tasks, requiring visual spatial memory (VSM), males exhibit higher performance levels compared to females (a difference attributed to sex steroid hormonal influences). Based upon the results from our companion investigation, this study examined the influence of prenatal sex steroid hormone manipulations on VSM in adulthood, as assessed in the radial arm maze. Additionally, the influence of dietary soy phytoestrogens (i.e., the presence of high or low estrogen-like compounds present in the animal's diet) on VSM was examined in combination with the prenatal hormonal manipulations. Results: Radial arm maze performance on a phytoestrogen-rich diet: 1) females treated …

Visual Spatial Memory Is Enhanced In Female Rats (But Inhibited In Males) By Dietary Soy Phytoestrogens, Edwin D. Lephart, Trent D. Lund, Timothy W. West, Lilyan Y. Tian, Lihong H. Bu, Daniel L. Simmons, Kenneth Setchell, Herman Adlercreutz

Faculty Publications

In learning and memory tasks, requiring visual spatial memory (VSM), males exhibit superior performance to females (a difference attributed to the hormonal influence of estrogen). This study examined the influence of phytoestrogens (estrogen-like plant compounds) on VSM, utilizing radial arm-maze methods to examine varying aspects of memory. Additionally, brain phytoestrogen, calbindin (CALB), and cyclooxygenase-2 (COX-2) levels were determined. Results: Female rats receiving lifelong exposure to a high-phytoestrogen containing diet (Phyto-600) acquired the maze faster than females fed a phytoestrogen-free diet (Phyto-free); in males the opposite diet effect was identified. In a separate experiment, at 80 days-of-age, animals fed the Phyto-600 …

Biology And Conservation Of The Coral Pink Sand Dunes Tiger Beetle, Cicindela Limbata Albissima Rumpp, C. Barry Kinsley, James M. Hill

Western North American Naturalist

This study investigated the distribution, abundance, and biology of Cicindela limbata albissima Rumpp, an endemic tiger beetle known only from the Coral Pink Sand Dunes (CPSD) in southwestern Utah. A recently implemented conservation agreement between BLM, USFWS, Utah State Parks, and Kane County protects most of the known habitat of this beetle from off-highway vehicle (OHV) use. A search of collection records and field surveys of 19 Great Basin sand dune sites indicated that this species occurs only at CPSD. Yearly index counts of adults (1992–1998) during peak season in May ranged from 331 in 1997 to 895 in 1993, …

Nanonemoura, A New Stonefly Genus From The Columbia River Gorge, Oregon (Plecoptera: Nemouridae), R. W. Baumann, G.R. Fiala

Western North American Naturalist

Nanonemoura, a new genus of Nearctic Nemouridae, is described to accommodate Nemoura wahkeena Jewett. New descriptions and illustrations are provided for the adult male, adult female, and nymph collected at Wahkeena Spring, Columbia River George, Oregon. A diagnosis is furnished to distinguish the new genus from related genera of the subfamily Nemourinae.

Site And Stand Characteristics Related To White Pine Blister Rust In High-Elevation Forests Of Southern Idaho And Western Wyoming, Jonathan P. Smith, James T. Hoffman

Western North American Naturalist

Successful infection of white pine species by white pine blister rust (WPBR) is contingent upon environmental conditions that are favorable to the spread and development of Cronartium ribicola. Site and stand factors related to this process have been studied elsewhere within the distribution of the disease, but few studies have concentrated on the high-elevation white pine forests of southern Idaho and western Wyoming. We found that mean summer precipitation, average tree diameter, and elevation were the most important variables in 3 logistic regression models of WPBR presence and intensity. The models were tested on a randomly chosen portion of …

Exotic Plants In Early And Late Seral Vegetation Of Fifteen Northern Rocky Mountain Environments (Hts), T. Weaver, D. Gusafson, J. Lichthardt

Western North American Naturalist

We determined the capacity of exotic plants to invade major environmental types of the northern Rocky Mountains. We did this by observing their presence on disturbed and undisturbed sites in relatively well inoculated locations—corridors adjacent to highways—on transects across the mountains in Glacier National Park and Grand Teton National Park and on low-altitude sites between them. We draw 3 primary conclusions. First, of 29 exotics commonly found, the most dominant are intentionally introduced grasses (Agrostis, Bromus, Dactylis, and especially Phleum pratense and Poa pratensis) and legumes (Melilotus, Medicago, and Trifolium) rather than the forbs …

Comparative Tolerance Of Four Stocks Of Cuttthroat Trout To Extremes In Temperature, Salinity, And Hypoxia, Eric J. Wagner, Ronney E. Arndt, Mark Brough

Western North American Naturalist

Four stocks of cutthroat trout (Oncorhynchus clarki) were exposed to high temperature, high salinity, and low dissolved oxygen to determine inherent differences. The fish tested included 2 stocks of Bonneville cutthroat trout (O. c. utah), a lacustrine stock derived from Bear Lake and a fluvial-origin stock from southern Utah (Manning Meadow Reservoir). The other 2 stocks tested were from Electric Lake (largely Yellowstone cutthroat trout, O. c. bouvieri) and Jackson Hole, Wyoming (fine-spotted Snake River cutthroat trout, O. c. subsp.). Temperature tests were either critical thermal maximum (CTM) or 96-hour trials using juveniles acclimated between …

Drumming Behavior And Life History Notes Of A High-Altitude Colorado Population Of The Stonefly Isoperla Petersoni Needham, John B. Sandberg, Kenneth W. Stewart

Western North American Naturalist

Late instar nymphs and adults of a Colorado Hudsonian zone population of Isoperla petersoni Needham and Christenson were studied during the summer and early fall months of 1998, when stream temperature ranged from 3.3 °C to 8.9 °C. Early and middle instar nymphs were absent from July to October, and nymphs attained maximum size in mid-August during the 2nd week of adult field presence, suggesting a univoltine-slow life cycle. Nymphs were carnivorous and fed primarily on chironomid larvae. Adults were present from August to mid-October, with peak numbers of adult males and females occurring in mid-September and late September, respectively. …

Physiological, Morphological, And Environmental Variation Among Geographically Isolated Cottonwood (Populus Deltoides) Populations In New Mexico, Diane L. Rowland, Lucille Beals, Amina A. Chaudhry, Ann S. Evans, Larry S. Grodeska

Western North American Naturalist

The ability of a plant population to respond and eventually adapt to environmental stress ultimately determines that population's survival. This becomes especially significant in environments where important plant resource levels have radically decreased. Southwestern riparian areas have numerous plant species that are experiencing radical changes in water availability due to construction of dams, and thus their ability to respond to such changes is critical. One such species likely to be greatly affected by these hydrological changes is Populus deltoides var. wislizenii (cottonwood) because it relies heavily on both groundwater and river surface volume as primary water sources. Both water sources …

A Rule-Based Model For Mapping Potential Exotic Plant Distribution, Don G. Despain, T. Weaver, Richard J. Aspinall

Western North American Naturalist

Wildland managers need a method to predict which portions of the lands under their stewardship are susceptible to invasion by exotic plants. We combined a database listing exotic plant species known to occur in major environmental types (habitat types) throughout the northern Rocky Mountains with a digital vegetation map of environmental types for a major national park in the region (Yellowstone National Park) to produce maps of areas potentially threatened by major exotic species. Such maps should be helpful to managers concerned with monitoring and controlling exotic plants.

A Habitat Suitability Model For Pygmy Rabbits (Brachylagus Idahoensis) In Southeastern Idaho, Kate I. Gabler, Laura T. Heady, John W. Laundré

Western North American Naturalist

A habitat suitability model was developed for pygmy rabbit (Brachylagus idahoensis) habitat on the Idaho National Engineering and Environmental Laboratory (INEEL) in southeastern Idaho. Suitable pygmy rabbit areas were characterized by greater cover and density of total shrubs and big sagebrush (Artemisia tridentata), as well as greater forb cover. Soil texture also played an important role in distinguishing suitable pygmy rabbit areas from nonuse sites. Principal components analysis (PCA) of several vegetation variables and soil texture was used to develop a habitat suitability model for pygmy rabbit habitat. This model, which can be used to successfully …

Mortality Of The Endangered Wright Fishhook Cactus (Sclerocatus Wrightiae) By An Opuntia-Borer Beetle (Cerambycidae: Moneilema Semipunctatum), Ronald J. Kass

Western North American Naturalist

No abstract provided.