Life Sciences Commons^™

Asymmetrical Force Production In The Maneuvering Flight Of Pigeons, Douglas R. Warrick, Kenneth P. Dial, Andrew A. Biewener

Biological Sciences Faculty Publications

Downstroke force produced by Rock Doves (Columba livia) as they negotiated an obstacle course was measured using in vivo recordings of delto-pectoral crest strain. During this slow $(<6\ {\rm m}\ {\rm s}^{-1})$ , maneuvering flight, pigeons produced a series of four to six successive wingbeats in which the wing on the outside of the turn produced greater peak force than the wing on the inside of the turn, suggesting that the birds maneuvered in a saltatory manner during slow flight. This asymmetrical downstroke force may be used to increase or reestablish bank lost during upstroke, or it may be directed as thrust to compensate for adverse yaw or create excess yaw to alter the bird's direction of flight. Continuous production of asymmetrical downstroke force through a turn differs from the traditional model of maneuvering flight, in which asymmetrical force is used only to initiate a bank, the forces are briefly reversed to arrest the momentum of the roll and then equalized to maintain the established bank, and the redirected lift of the wings then effects a turn. Although this traditional model probably describes most turns initiated during fast and gliding flight in birds, it underestimates the complexity of maneuvering during slow, flapping flight, where sophisticated kinematics and neuromuscular control are needed to change direction effectively.

On The Importance Of Stopover Sites To Migrating Birds, Richard L. Hutto

Biological Sciences Faculty Publications

No abstract provided.

Center For Grassland Studies Newsletter, Fall 1998, Volume 4, No. 4

Center for Grassland Studies: Newsletters

Contents:

Subirrigated Meadow Management Pratices by Jerry Volesky, West Central Research and Extension Center, UNL

Wildlife Habitat Incentive Program by Craig Derickson and Gerald Jasmer, USDA, Natural Resources Conservation Service

The Effect of Planting Date on Turfgrass Seed Production in the High Plains by Rebecca Harms, Turfgrass Project Coordinator, UNL

Beef Home Study Courses Begin Fifth Year

Plan Now to Attend SRM/AFGC Joint Meeting

Nebline, October 1998

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Character Counts! for everyone
Growing hardy bulbs
Tree planting snafus
Timely care of hardy chrysantheums
Mole, mole, go away
Termite control options: baits vs. barriers?
Celebrate America Recycles Day
Household hazardous waste collection: November 7
It's time for your annual “pest-proof” check-up
Removing skunk odor
Temporary/emergency grain storage options
Control leafy spurge
Fall clean-up of warm-season grasses
The first frost, the last hurrah
Pasture weed control
What is this thing called winter desiccation?
Dormant planting grasses and legumes
Finding facts about vegetables and fruits
Healthy Eating: No-Crust Pumpkin Pie
Focus on Food
Preparing for the winter food olympics!
Family & …

Ard News October 1998

Agricultural Research Division: News and Annual Reports

CONTENTS:
Comments from the Dean
The North Central Region (NCR) Sustainable Agriculture Research and Education (SARE) Program
Revised Guidelines far ARD Travel Reimbursement Program far Prospective Graduate Students
Mussehl Endowment
Nebraska Corn Development, Utilization and Marketing Board Funding July 1, 1998 - June 30, 1999
Nebraska Grain Sorghum Development, Utilization and Marketing Board Funding July 1, 1998 - June 30, 1999
Nebraska Dry Bean Development, Utilization and Marketing Board Funding July 1, 1998 -June 30, 1999
Nebraska Soybean Development, Utilization and Marketing Baard Funding Oct. 1, 1998 - Sept. 30, 1999
Proposals Submitted far Federal Grants
Nebraska Wheat Baard Funding …

Mutational Analysis Of A Transcriptional Activation Region Of The Vp16 Protein Of Herpes Simplex Virus, Susan M. Sullivan, Peter J. Horn, Victoria A. Olson, Allen H. Koop

University Faculty Publications and Creative Works

The VP16 protein of herpes simplex virus is a potent transcriptional activator of the viral immediate early genes. The transcriptional activation region of VP16 can be divided into two functional subregions, here designated VP16N (comprising amino acids 413-456) and VP16C (amino acids 450-490). Assays of VP16C mutants resulting from both random and alanine-scanning mutagenesis indicated that the sidechains of three phenylalanines (at positions 473, 475 and 479) and one acidic residue (glutamate 476) are important for transcriptional activation. Aromatic and bulky hydrophobic amino acids were effective substitutes for each of the three Phe residues, whereas replacement with smaller or polar …

Best Practices For Tourism Center Development Along The Red Sea Coast, Stephen M. Reeve, Stephen C. Jameson, Ragaei S. Abdel-Fattah, Bernhard Riegl, Randa Hassan, Alvin P. Newman

Marine & Environmental Sciences Faculty Reports

The spectacular coastlines along Egypt's Red Sea and Gulf of Aqaba are the focus for one of the fastest growing tourism economies in the world. In order to accomplish national objectives for growth in permanent, well-paying jobs and in foreign exchange earnings, the Tourism Development Authority (TDA) has launched an initiative to make land available to investors for resort development along these coastlines. As of December, 1997, 6,000 hotel rooms are under construction in the Red Sea region and the TDA has proposals for at least 240 major resorts to be built by the year 2020.

While this program has …

1998 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library

Scholars and Artists Bibliographies

This bibliography was created for the annual Friends of the Michael Schwartz Library Scholars and Artists Reception, recognizing scholarly and creative achievements of Cleveland State University faculty, staff and emeriti

Grassland Birds And Habitat Structure In Sandhills Prairie Managed Using Cattle Or Bison Plus Fire, Randall Griebel, Stephen L. Winter, Allen Steuter

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

Grassland birds are known to respond to specific changes in habitat structure, such as plant height and density. However, the response of grassland bird communities to management induced changes in the regional habitat mosaic are less well understood. Grazing by ungulates and fire regimes play an important role in defining the habitat mosaic in the Great Plains. We provide information on bird abundance, distribution, and habitat structure from similar sandhill prairie landscapes managed traditionally with grazing by cattle (Bos taurus) and by a dynamic bison (Bos bison)-plus-fire regime. Although the two management regimes are dissimilar, only …

Forage News [1998-10], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Fall Grazing School
• One Day Grazing Schools
• Forage Conference
• Forages at KCA
• Prussic Acid Poisoning
• Drought Stressed Pastures
• Upcoming Events

Interagency Lake Mead And Las Vegas Wash Monitoring Program: Standard Operating Procedures Manual, Bureau Of Reclamation, City Of Henderson Water Reclamation Facility, City Of Las Vegas Water Pollution Control Facility, Clark County Sanitation District, Nevada, Southern Nevada Water Authority

Publications (WR)

A number of agencies sample Lake Mead and the Las Vegas Wash on a routine basis at several locations. In order to share and properly interpret the data, the Bureau of Reclamation, Southern Nevada Water Authority and the three Wastewater Treatment Facilities (City of Las Vegas, Clark County Sanitation District and City of Henderson) formed a committee to examine sampling and analytical protocols and to share information with the goal of maximizing the data quality. The group first met in April 1997. It was agreed that an effort should be made to discuss and compare specific sampling and analytical techniques …

Louisiana Agriculture Magazine, Fall 1998, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

4 | The Chalcolithic Culture Of The Golan, Claire Epstein

IAA Reports—Monograph Series of the Israel Antiquities Authority

This volume is devoted to the results of the extensive excavations, surveys and research by Claire Epstein of the Chalcolithic culture of the Golan. The Golan Chalcolithic culture was an egalitarian, clan-based society of small villages and farmsteads, with unique and outstanding cultural features, including the architecture and house plans, the characteristic pottery assemblages, and the distinctive basalt and flint artifacts.

Increased Photosynthesis Offsets Costs Of Allocation To Sapwood In An Arid Environment, Eileen V. Carey, Ragan M. Callaway, Evan H. Delucia

Biological Sciences Faculty Publications

We assessed the effect that varying patterns of biomass allocation had on growth of ponderosa pine (Pinus ponderosa) growing in the desert climate of the Great Basin and the montane climate of the eastern Sierra Nevada. Prior work established that desert trees have lower leaf:sapwood area ratios than montane trees (0.104 and 0.201 m²/cm², respectively) and proportionally greater stem respiration. Sapwood:leaf mass ratios are also greater and increase more as a function stem diameter in desert than in montane trees. We hypothesized that this increased allocation of carbon to stem sapwood and stem respiration …

Vegetation Analysis: A Graphical Analysis Of Plant Succession In Desert Communities Affected By Fire, Jeff Lantow

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Mojave Desert is affected by fire every year. With each fire comes the removal of old growth and, in its place, new growth – consisting primarily of those species which thrive in disturbed areas. The focus of my research is to look at plant communities that have been disturbed by fire, and examine the successional pathway of these disturbed environments. The seven environments I analyzed were burned within the last twenty years and are found in the Coleogyne ramosissima ecotone throughout the Spring Mountain range near Las Vegas, Nevada. The data was collected with randomly chosen circle plots in …

Water Conservation In The Las Vegas Valley, Judith M. Keir

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis deals primarily with residential use of water in the Las Vegas Valley, an arid climate located in the Mojave Desert, and whether the education of people living here has any bearing on whether or not they conserve water. Many of the residents of the Las Vegas Valley have moved from other areas of the country, and perhaps are not aware of the fact that there is a limited supply of water available to the Valley. I believe that people are not necessarily wasteful, and that they would want to conserve water, if they were aware that conservation and …

Bacterial Stress Responses To 1-Megahertz Pulsed Ultrasound In The Presence Of Microbubbles, Amy Cheng Vollmer, Sylvia D. Sakyiama Kwakye , '98, Matthew Evan Halpern , '98, E. Carr Everbach

Engineering Faculty Works

Members of a panel of stress-responsive biosensors have been used to study the effect of megahertz frequency ultrasound onEscherichia coli. Insonification causes acoustic cavitation, the collapse of oscillating microbubbles in solution, which can damage bacterial cells. A focused 1-MHz ultrasound transducer, capable of generating a spatial peak pulse average intensity of 500 W/cm2, was used to treat liquid bacterial cultures. Stress-responsive promoters fused to luxCDABE allowed the continuous measurement of light produced as a result of protein damage, DNA damage, oxidative stress, and membrane perturbation. A promoter responsive to ammonia limitation was not transcriptionally activated under test conditions. In contrast …

The Relationship Between Physical Activity And Flexibility, Tanya Marie Schramm

Student Work

The purpose of this study was to determine if a relationship existed between flexibility and physical activity levels. Subjects included 128 male (n=64) and female (n=64) volunteers, 19 to 55 years of age. All subjects completed a physical activity questionnaire (which differentiated between work, sport, leisure and total physical activity) and a series of five flexibility tests. Four of the five flexibility tests were completed with the use of a goniometer which measured shoulder flexion, hip flexion, knee flexion and ankle dorsiflexion. The sit and reach test was used to assess hamstring­ lumbar flexibility. After analyzing the data by using …

Morphogenesis Of Douglas Fir Buds Is Altered At Elevated Temperature But Not At Elevated Co2, Martha E. Apple, Melissa S. Lucash, David M. Olszyk, David T. Tingey

Environmental Science and Management Faculty Publications and Presentations

Global climatic change as expressed by increased CO₂ and temperature has the potential for dramatic effects on trees. To determine what its effects may be on Pacific Northwest forests, Douglas-fir (Pseudotsuga menziesii ) seedlings were grown in sun-lit controlled environment chambers at ambient or elevated (+4°C above ambient) temperature, and at ambient or elevated (+200 ppm above ambient) CO₂. In 1995–1996 and 1996–1997, elevated CO₂ had no effect on vegetative bud morphology, while the following unusual morphological characteristics were found with greater frequency at elevated temperature than at ambient: rosetted buds with reflexed and loosened outer …

Revegetation Strategies For Groundwater Control In The Eastern Wheatbelt, C E. Mcconnell

Resource management technical reports

No abstract provided.

Monitoring The Mineral Status And Health Of Sheep Grazing On A Rehabilitated Bauxite Residue Stockpile And On Alkaloam Amended Pasture, Gerard M. Smith

Animal production and livestock published reports

No abstract provided.

Beneficial Arthropods Associated With Buffalograss, Tiffany Heng-Moss, Frederick P. Baxendale, Terrance P. Riordan

Department of Entomology: Faculty Publications

Beneficial arthropods collected from buffalograss, Buchloe dactyloides (Nuttall) Engelmann, evaluation plots and vegetatively established buffalograss lawns included predatory ants, spiders, ground beetles, rove beetles, big-eyed.bugs, and several species of hymenopterous parasitoids. Ants and spiders were the most abundant beneficial arthropods collected, representing 84% of the total beneficial arthropods captured. Pitfall traps collected >2.5 times as many (16,094) beneficial arthropods as sod plug samples (6,054), demonstrating that pitfall traps are a more effective technique than sod plugs for capturing highly mobile surface-dwelling arthropods. Families of parasitoids captured on sticky traps during the 2-yr sampling period included Scelionidae, Encyrtidae, Mymaridae, and Trichogrammatidae. …

Supplement To: Bt Corn & European Corn Borer: Long-Term Success Through Resistance Management, Ncr-602, Regional Research Committee, Nc 205

Department of Entomology: Faculty Publications

1. NC-205 is a regional research committee supported by Land Grant Universities, USDA-CSREES and ARS. It is comprised of scientists from 20 states, Mexico and Canada who have conducted research on stalk-boring pests since 1954.

2. The Committee re-examined many of the assumptions upon which our previous scientific assessments were based. This update http://ent.agri.umn.edu/ecb/nc205doc.htm summarizes our scientific understanding and recommendations for resistance management of Bt corn. Our initial recommendations were published in North Central Regional Publication 602 during 1997. An electronic version of NCR-602 is located at http://www.extension.umn.edu/Documents/D/C/DC7055.html.

3. The Committee reaffirmed, as a premise, the importance of prolonging the …

Position Effect Takes Precedence Over Target Sequence In Determination Of Adenine Methylation Patterns In The Nuclear Genome Of A Eukaryote, Tetrahymena Thermophila, Kathleen M. Karrer, Teresa A. Van Nuland

Biological Sciences Faculty Research and Publications

Approximately 0.8% of the adenine residues in the macronuclear DNA of the ciliated protozoan Tetrahymena thermophila are modified to N⁶-methyladenine. DNA methylation is site specific and the pattern of methylation is constant between clonal cell lines. In vivo, modification of adenine residues appears to occur exclusively in the sequence 5′-NAT-3′, but no consensus sequence for modified sites has been found. In this study, DNA fragments containing a site that is uniformly methylated on the 50 copies of the macronuclear chromosome were cloned into the extrachromosomal rDNA. In the novel location on the rDNA minichromosome, the site was …

Vertical Profiles Of Virus-Like Particles And Bacteria In The Water Column And Sediments Of Chesapeake Bay, Usa, Lisa A. Drake, Keun-Hyung Choi, A. G. Edward Haskell, Fred C. Dobbs

OES Faculty Publications

Vertical profiles of virus-like particles (VLPs) and bacteria were determined by near-synoptic sampling through the water column and 15 to 25 cm into the sediment at 5 stations across the mouth of Chesapeake Bay, USA. VLPs were about 10 times more abundant in the pore water (grand mean = 3.6 x 10(8) VLPs ml(-1)) than in the water column (grand mean = 3.8 x 10(7) VLPs ml(-1)). Similarly, bacteria counts were about 3 times higher in the pore water (grand mean = 6.5 x 10(6) bacteria ml(-1)) than in the water column (grand mean = 2.4 x 10(6) bacteria ml(-1)). …

An Addendum To Anthocharis Midea Dos Passos And Klots 1969: Description Of A New Subspecies From Texas, Ronald R. Gatrelle

The Taxonomic Report of the International Lepidoptera Survey

This paper verifies and expands upon the information presented by dos Passos and Klots in their 1969 systematic revision of Anthocharis midea. Their restriction of the range of A. midea midea to the coastal islands and immediate coast of Georgia and South Carolina, United States is confirmed and expanded north into southern coastal North Carolina. Their range of A. m. annickae is expanded southward from Virginia to central Georgia. A new subspecies, A. midea texana, is described from Texas. Texana is annickae’s ancestor. It differs from annickae only in having greatly reduced black scaling …

Review Of Catálogo De La Coleccíon Nacional De Helmintos By Rafael Lamothe-Argumedo, Luis Garcia-Prieto, David Osorio-Sarabia, Gerardo Pérez-Ponce De León (Unam, 1996), Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Review of Catálogo de la Coleccíon Nacional de Helmintos by Rafael Lamothe-Argumedo, Luis Garcia-Prieto, David Osorio-Sarabia and Gerardo Pérez-Ponce de León (UNAM, 1996).

Theories Of Structure Versus Theories Of Change, Melanie Mitchell

Computer Science Faculty Publications and Presentations

The dynamics/computation debate recalls a similar debate in the evolutionary biology community concerning the relative primacy of theories of structure versus theories of change. A full account of cognition will require a rapprochement between such theories and will include both computational and dynamical notions. The key to making computation relevant to cognition is not making it analog, but rather understanding how functional information-processing structures can emerge in complex dynamical systems.

Changes In Small Mammal Community Attributes Associated With Increasing Pine Stand Age In Managed Pine Plantations In Southeastern Virginia, James Douglas Dolan

Biological Sciences Theses & Dissertations

Loblolly pine plantations were examined at different ages to identify small mammal community attributes in relation to the succession of the plant community. Forest floor and understory plant communities were characterized. Small mammals were collected by Fitch (live) traps and pitfall traps in four age classes during five seasons of study. Fitch live traps and pitfall traps were used in conjunction with one another to obtain the most accurate depiction of the small mammal community. Fitch traps accounted for 65 % of small mammal captures and 7 of 9 species captured. Small mammal abundance and biomass declined with increasing stand …

The Effects Of Dehydration And Rehydration On The One-Repetition Maximum Bench Press Of Weight Trained Males, James E. Schoffstall

Human Movement Studies & Special Education Theses & Dissertations

The purpose of this study was to examine the effects of dehydration and rehydration on the one repetition maximum (1-RM) bench press of weight trained males. The ten subjects displayed the following characteristics: 25.3 ± 3.2 years old, 85.5 ± 16.4 kilograms body mass and a 117.9 ± 24.0 kilogram base-line 1-RM. Ten subjects were tested on two separate days, with one week between each test day. The subjects were randomly assigned to begin their testing in either the A protocol or the B protocol. During the A protocol testing day, the subjects completed two one repetition maximum bench press …