Digital Commons Network^™

The Effect Of Resource Aggregation At Different Scales: Optimal Foraging Behavior Of Cotesia Rubecula, Brigitte Tenhumberg, Michael A. Keller, Andrew J. Tyre, Hugh P. Possingham

School of Biological Sciences: Faculty Publications

Resources can be aggregated both within and between patches. In this article, we examine how aggregation at these different scales influences the behavior and performance of foragers. We developed an optimal foraging model of the foraging behavior of the parasitoid wasp Cotesia rubecula parasitizing the larvae of the cabbage butterfly Pieris rapae. The optimal behavior was found using stochastic dynamic programming. The most interesting and novel result is that the effect of resource aggregation within and between patches depends on the degree of aggregation both within and between patches as well as on the local host density in the occupied …

Engaging In Difficult Dialogues Beyond Color: Where Do You Draw The Line Between Race, Gender And Authority In The Classroom?, Safoura A. Boukari

Different Perspectives on Majority Rules: 6th Annual National Conference (2001)

Grounding the discussion in Check Anta Diop’s Cradle theory, this paper invites us for a critical thinking and questioning of the very existence, the relevance of the color concept itself alongside the negative and detrimental impacts color has on, especially, Black women in academia. Historical, anthropological, scientific findings and theorists of the “Monogenesis” like, Asa G. Hilliard III (Free Your Mind: Return to the Source) traced the human origin back to a single human being, a woman, more than 10.000 years ago. In reference to the current trend, skin color could be defined as nothing, but the result of an …

In Pursuit Of Brain Compatible Intimate Relationships, Saleef Kafajouffee Ph.D.

Different Perspectives on Majority Rules: 6th Annual National Conference (2001)

This session comprises a highly interactive and creative format designed to provide a maximum of information and conceptual integration regarding human relationships. The presentation style embodies creativity and scholarly intent that leads the audience through brain and contextual processes that severely limit or lovingly spiritually enhance male/female relationships.

Promoting Higher Education: The Latino Achievement Mentoring Program (Lamp), Byron L. Zamboanga, Lisa Knoche, Gloria Gonzalez-Kruger, Marcela Raffaelli

Different Perspectives on Majority Rules: 6th Annual National Conference (2001)

Statistics suggest that Latino youths are at risk for academic underachievement and withdrawal. Culturally sensitive approaches to supporting school achievement based on the needs of Latino youth and their families must be developed. In response to these needs, the Latino Research Initiative (LRI), a collaborative group with members from the University of Nebraska-Lincoln (UNL) and the Hispanic Community Center (HCC) created the Latino Achievement Mentoring Program (LAMP). LAMP is a culturally appropriate mentoring program designed to promote school success and post-secondary opportunities for Latino youths. This program provides Latino youths with positive role models and information and guidance about academic …

Mixed-Bloods, Mestizas, And Pintos: Race, Gender, And Claims To Whiteness In Helen Hunt Jackson's Ramona And María Amparo Ruiz De Burton's Who Would Have Thought It?, Margaret D. Jacobs

Department of History: Faculty Publications

A number of literary scholars have found much to compare between Jackson's Ramona and Ruiz de Burton's other novel, The Squatter and the Don. Both take place in nineteenth-century California and provide contrasting views of Californio and indigenous cultures. A comparison of Who Would Have Thought It? and Ramona, however, yields further crucial insights into how Ruiz de Burton critiqued Easterners' views of the West. Rather than situating this novel in the West, Ruiz de Burton locates it primarily in New England. This allows Ruiz de Burton to turn the tables on all the "Yankees" who wrote about the West. …

Targeting Alphas Can Make Coyote Control More Effective And Socially Acceptable, Michael M. Jaeger, Karen M. Blejwas, Benjamin N. Sacks, Jennifer C.C. Neale, Mary M. Conner, Dale R. Mccullough

United States Department of Agriculture Wildlife Services: Staff Publications

Research at the UC Hopland Research and Extension Center (HREC) has improved our understanding of how to reduce sheep depredation while minimizing the impact on coyotes. Analysis of a 14-year data set of HREC coyote-control efforts found that sheep depredation losses were not correlated with the number of coyotes removed in any of three time scales analyzed (yearly, seasonally and monthly) during corresponding intervals for the next 2 years. Field research using radiotelemetry to track coyotes supported and explained this finding. For example, in 1995, dominant “alphas” from four territories were associated with 89% of 74 coyote-killed lambs; “betas” and …

Should We Essentially Ignore The Role Of Stimuli In A General Account Of Operant Selection?, Rick A. Bevins

Department of Psychology: Faculty Publications

An "Open Peer Commentary" on the article "A general account of selection: Biology, immunology, and behavior," by David L. Hull, Rodney E. Langman, and Sigrid S. Glenn.

The selectionist account of behavior is actually a focused discussion of operant selection. To this end, the authors essentially exclude stimuli from their analysis. This exclusion is inconsistent with the importance placed on environmental interaction in their general account. Further, this exclusion limits the generality of their account by missing important sources of stimulus-elicited behavior (e.g., classical conditioning).

Transitions In Histone Acetylation Reveal Boundaries Of Three Separately Regulated Neighboring Loci, Michael D. Litt, Melanie A. Simpson, Felix Recillas-Targa, Marie-Noelle Prioleau, Gary Felsenfeld

Department of Biochemistry: Faculty Publications

We have studied developmentally regulated patterns of histone acetylation at high resolution across ~54 kb of DNA containing three independently regulated but neighboring genetic loci. These include a folate receptor gene, a 16 kb condensed chromatin region, the chicken β-globin domain and an adjacent olfactory receptor gene. Within these regions the relative levels of acetylation appear to fall into three classes. The condensed chromatin region maintains the lowest acetylation at every developmental stage. Genes that are inactive show similarly low levels, but activation results in a dramatic increase in acetylation. The highest levels of acetylation are seen at regulatory sites …

Intellectual Property Rights For Agricultural Biotechnology: Piracy And Its Ramifications For U.S. Agriculture, Konstantinos Giannakas

Cornhusker Economics

Parallel revolutions in molecular biology and the legal framework that assigns intellectual property rights (IPRs) to plant genetic resources have resulted in the emergence of agricultural biotechnology and the introduction of genetically modified (GM) products into the food system. IPRs create economic incentives for research and development by making the innovator the residual claimant of the benefits associated with the new technology.

Determination Of Cabergoline By Electrospray Ionization Tandem Mass Spectrometry: Picogram Detection Via Column Focusing Sample Introduction, Bruce A. Kimball, Thomas J. Deliberto, John J. Johnston

United States Department of Agriculture Wildlife Services: Staff Publications

An electrospray ionization tandem mass spectrometric method was developed for low-picogram detection of an ergot alkaloid, cabergoline, in coyote plasma extracts. Cabergoline is under investigation as an abortifacient in canid species. Central to the successful development of this method was the ability to introduce relatively large sample volumes into the mass spectrometer. This was achieved by focusing the analyte on a conventional high-performance liquid chromatography guard column prior to elution into the spectrometer. Volumes up to at least 900 μL could be injected onto the guard column using a 100% aqueous mobile phase. Cabergoline retained on the column was eluted …

How Do Brazilian Street Youth Experience ‘The Street’?: Analysis Of A Sentence Completion Task, Marcela Raffaelli, Silvia H. Koller, Caroline T. Reppold, Mateus B. Kuschick, Fernanda M. B. Krum, Denise R. Bandeira

Department of Psychology: Faculty Publications

This study investigated how homeless Brazilian youth experience the street and examined factors linked to positive and negative feelings about the street. An opportunity sample of 35 boys and 34 girls aged 10–18 completed a structured interview and sentence completion task aimed at eliciting open-ended responses in a standardized manner. Analyses revealed great diversity in youths’ views of the street; moreover, in analyses controlling for age and gender, youth reporting feeling positive on the street differed from those who felt negative in reasons for leaving home, family situation and daily survival. The findings support the value of the sentence completion …

Accumulation And Consumption Of Odorous Compounds In Feedlot Soils Under Aerobic, Fermentative, And Anaerobic Respiratory Conditions, D. N. Miller

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Agricultural odors present an increasingly difficult challenge to livestock producers, yet very little information is available on the microbiology of odor production or microbial factors that regulate the emission of odors. This study examined the microbial potential for odor production and odor consumption in two soils from a cattle production facility in central Nebraska. The two soils tested were collected from a feedlot pen and a runoff ditch below the pen and contained high- and low-fecal matter content, respectively. These soils were tested for their ability to produce and consume a mixture of VFA and aromatic compounds (phenols and indoles) …

Monarch Larvae Sensitivity To Bacillus Thuringiensis Purified Proteins And Pollen, Richard L. Hellmich, Blair D. Siegfried, Mark K. Sears, Diane E. Stanley-Horn, Michael J. Daniels, Heather R. Mattila, Terrence A. Spencer, Keith J. Bidne, Leslie C. Lewis

Department of Entomology: Faculty Publications

Laboratory tests were conducted to establish the relative toxicity of Bacillus thuringiensis (Bt) toxins and pollen from Bt corn to monarch larvae. Toxins tested included Cry1Ab, Cry1Ac, Cry9C, and Cry1F. Three methods were used: (i) purified toxins incorporated into artificial diet, (ii) pollen collected from Bt corn hybrids applied directly to milkweed leaf discs, and (iii) Bt pollen contaminated with corn tassel material applied directly to milkweed leaf discs. Bioassays of purified Bt toxins indicate that Cry9C and Cry1F proteins are relatively nontoxic to monarch first instars, whereas first instars are sensitive to Cry1Ab and Cry1Ac proteins. Older instars were …

Corn Pollen Deposition On Milkweeds In And Near Cornfields, John M. Pleasants, Richard L. Hellmich, Galen P. Dively, Mark K. Sears, Diane E. Stanley-Horn, Heather R. Mattila, John E. Foster, Peter Clark, Gretchen D. Jones

Department of Entomology: Faculty Publications

The density of corn pollen on leaves of milkweed plants inside and outside of cornfields was measured in several studies from different localities. The purpose was to obtain a representative picture of naturally occurring pollen densities to provide a perspective for laboratory and field studies of monarch larvae feeding on milkweed leaves with Bt corn pollen. Pollen density was highest (average 170.6 grains per cm²) inside the cornfield and was progressively lower from the field edge outward, falling to 14.2 grains per cm² at 2 m. Inside the cornfield, and for each distance from the field edge, …

Impact Of Bt Corn Pollen On Monarch Butterfly Populations: A Risk Assessment, Mark K. Sears, Richard L. Hellmich, Diane L. Stanley-Horn, Karen S. Oberhauser, John M. Pleasants, Heather R. Mattila, Blair D. Siegfried, Galen P. Dively

Department of Entomology: Faculty Publications

A collaborative research effort by scientists in several states and in Canada has produced information to develop a formal risk assessment of the impact of Bt corn on monarch butterfly (Danaus plexippus) populations. Information was sought on the acute toxic effects of Bt corn pollen and the degree to which monarch larvae would be exposed to toxic amounts of Bt pollen on its host plant, the common milkweed, Asclepias syriaca, found in and around cornfields. Expression of Cry proteins, the active toxicant found in Bt corn tissues, differed among hybrids, and especially so in the concentrations found …

Monarch Larvae Sensitivity To Bacillus Thuringiensis Purified Proteins And Pollen, Richard L. Hellmich, Blair Siegfried, Mark K. Sears, Diane E. Stanley-Horn, Michael J. Daniels, Heather R. Matilla, Terrence A. Spencer, Keith G. Bidne, Leslie C. Lewis

Department of Entomology: Faculty Publications

Laboratory tests were conducted to establish the relative toxicity of Bacillus thuringiensis (Bt) toxins and pollen from Bt corn to monarch larvae. Toxins tested included Cry1Ab, Cry1Ac, Cry9C, and Cry1F. Three methods were used: (i) purified toxins incorporated into artificial diet, (ii) pollen collected from Bt corn hybrids applied directly to milkweed leaf discs, and (iii) Bt pollen contaminated with corn tassel material applied directly to milkweed leaf discs. Bioassays of purified Bt toxins indicate that Cry9C and Cry1F proteins are relatively nontoxic to monarch first instars, whereas first instars are sensitive to Cry1Ab and Cry1Ac proteins. Older …

Temporary Anion States Of Selected Amino Acids, Kayvan Aflatooni, B. Hitt, Gordon A. Gallup, Paul Burrow

Paul Burrow Publications

Vertical attachment energies for the formation of low-lying temporary anion states of glycine, alanine, phenylalanine, tryptophan, and proline in the gas phase are reported using electron transmission spectroscopy. Electron attachment into the empty π* orbital of the –COOH group was observed in all the compounds. Temporary anion states associated with the side groups in phenylalanine and tryptophan are found to be stabilized with respect to those in the reference compounds toluene and indole, respectively, by approximately 0.2 eV. We attribute this to electrostatic effects and explore, using simple theoretical models, the extent to which such anion states could be further …

Evaluation Of Chemical Repellents For Reducing Crop Damage By Dickcissels In Venezuela, M. L. Avery, E. A. Tillman, C.C. Lauker

United States Department of Agriculture Wildlife Services: Staff Publications

In Venezuela, lethal control of wintering Dickcissels (Spiza americana) is considered a threat to the species survival. To help farmers protect their rice and sorghum crops from depredations by Dickcissels and to minimize the killing of large numbers of these birds, alternative non-lethal crop protection measures are needed. To that end, the responses of captive Dickcissels to three bird-repellent chemicals applied to rice seed were evaluated. In one-cup feeding trials, treatments of methiocarb (0.05% g g^-1, applied as Mesurol® 75% wettable powder) and anthraquinone (0.5%, applied as Flight Control® ) reduced consumption of rice by 70% …

Center For Grassland Studies Newsletter, Fall 2001, Volume 7, No. 4

Center for Grassland Studies: Newsletters

New Hosts of the Buffalograss Chinch Bug, Blissus occiduus by Thomas Eickhoff and Frederick Baxendale, Department of Entomology, UNL

Grassland Opportunities in the New Farm Bill by Craig Derickson, Natural Resources Conservation Service, USDA

Nebraska Grazing Conference Huge Success

Grazing Livestock Systems Major Enters Third Year

Great Plains Migrations Symposium

“Promoting Prairie” Conference in June 2002

Movements And Population Structure Of Humpback Whales In The North Pacific, John Calambokidis, Gretchehn Steiger, Janice Straley, Louis Herman, Salvatore Cerchio, Dan Salden, Jorge Urban R., Jeff Jacobsen, Olga Von Ziegesar, Kenneth Balcomb, Christine Gabriele, Marilyn Dahlheim, Senzo Uchida, Graeme Ellis, Yukifumi Miyamura, Paloma Ladron De Guevara P., Manami Yamaguchi, Fumihiko Sato, Sally Mizroch, Lisa Schlender, Jay Barlow, Terrance Quinn Ii

United States Department of Commerce: Staff Publications

Despite the extensive use of photographic identification methods to investigate humpback whales in the North Pacific, few quantitative analyses have been conducted. We report on a comprehensive analysis of interchange in the North Pacific among three wintering regions (Mexico, Hawaii, and Japan) each with two to three subareas, and feeding areas that extended from southern California to the Aleutian Islands. Of the 6,413 identification photographs of humpback whales obtained by 16 independent research groups between 1990 and 1993 and examined for this study, 3,650 photographs were determined to be of suitable quality. A total of 1,241 matches was found by …

Nebline, October 2001

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Character Education Counts
Teaching Character by Example
Answers to Composting Questions
Growing Hardy Bulbs
Garden Cleanup
Fall Storage of Tender Bulbs, Corms and Tubers
Horticulture information center
My Child Was Sent Home With Head Lice — Now What Do I Do?
Eeek! There’s a Mouse in the House
Why Don’t Lice Treatments Seem to Work?
Insect Quiz
Facts and Myths of Hedge Apples
Sobering Farm Safety Statistics
Website Features Diverse Agricultural Opportunities
Most Grain Needs Aeration for Safe Storage
Moving Hay Bales Can be Dangerous
Corn Ethanol and By-Products Add Value to Nebraska
Keep Hay Bales Dry This Winter
Watch …

Ard News October 2001

Agricultural Research Division: News and Annual Reports

CONTENTS:
Comments from the Dean
IANR Facility Needs: The Capital Construction Budget Request Process
Husker Genetics
CSREES Appropriations for FY 2002
National Research Initiative Funding - FY 2000
Changes in Graduate Enrollment 1993 - 1999
Grants and Contracts Received August and September 2001
Proposals Submitted for Federal Grants
New or Revised Projects

Characteristics And Sequence Of Phosphoglycolate Phosphatase From A Eukaryotic Green Alga Chlamydomonas Reinhardtii, Tarlan G. Mamedov, Kensaku Suzuki, Kenji Miura, Ken-Ichi Kucho, Hideya Fukuzawa

Papers in Biochemical Engineering

Phosphoglycolate phosphatase (PGPase), a key en¬zyme of photorespiration in photosynthetic organisms, was purified from Chlamydomonas reinhardtii. The en¬zyme was an ~65-kDa homodimer with a pI value of 5.1 composed of ~32-kDa subunits not connected by any S–S bridges. It was also highly specific for phosphoglycolate with a Km value of 140 μM and an optimal pH between 8 and 9. The activity was strongly inhibited by CaCl2, and it recovered competitively following the addition of MgCl2 or EGTA. A mobility shift was observed in SDS-polyacrylamide gel electrophoresis by the addition of CaCl2, indicating that the enzyme binds to Ca2+ . …

Acuta Journal Of Telecommunications In Higher Education

ACUTA Journal

In This Issue

Discovering Hidden Revenue Sources in Ancillary Telecom Services

How Videoconferencing Helps Universities Serve New Markets

Show Me the Money- Entrepreneurs on Campus

IT and Return on Investment

Implementing IP Telephony

Rate Development/Cost Modeling at UT

Speech-Dialing the Right Campus Connection

lnstitutional Excellence Award: College of St. Elizabeth

President's Message

From the Executive Director

Jake B. Schrum, PhD

Internetworking Multimedia

Scwds Briefs: Volume 17, Number 3 (October 2001)

Southeastern Cooperative Wildlife Disease Study: Publications

• Biosecurity Alert
• The United Kingdom appears to be near success in eradicating foot-and-mouth disease (FMD).
• USDA declares chronic wasting disease CWD emergency in captive elk.
• CWD Calamity in Colorado: Approximately 1,300 animals in seven Colorado captive elk herds currently are under quarantine because chronic wasting disease (CWD) has been diagnosed in or traced to the herds.
• Further Spread of West Nile virus (WNV)
• Eastern Equine Encephalitis (EEE) virus was isolated from the brain of a wild white-tailed deer from Houston County, Georgia. Togaviridae, Culiseta melanura
• Equine protozoal myeloencephalitis (EPM) is a severe neurological …

Energetics And Cooperativity In Three-Center Hydrogen Bonding Interactions. I. Diacetamide-X Dimers .X=Hcn, Ch3Oh., Ruben D. Parra, Makoto Furukawa, Bing Gong, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

High level ab initio calculations are carried out on diacetamide–X (DA–X) dimers, X=HCN, CH₃OH. The dimers are used as model systems to investigate the energetics and cooperative phenomomena in intermolecular three-center hydrogen-bond (H-bond) interactions relative to two-center H-bond interactions. The trans–trans conformer of diacetamide is chosen as a suitable model for intermolecular three-center H bonding where one H atom is interacting with two acceptor atoms. The proton–acceptor atoms are rigidly held in the same molecule. For both model systems, it is found that the calculated interaction energy per H bond is appreciably smaller in the three-center than in …

Growth, Condition, And Mortality Of Black Crappie, Bluegill, And Yellow Perch In Nebraska Sand Hills Lakes, Craig P. Paukert, David W. Willis, Andrew L. Glidden

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

The growth, condition, and mortality of black crappie, bluegill, and yellow perch were measured in 30 Nebraska Sand Hills lakes (1998, 1999) to determine the value of these parameters in these fish populations compared to other Great Plains populations. Growth was variable for all three fish species, but similar to or higher than populations in other midwestern states. Bluegill condition, as measured by mean relative weight, ranged from 115 to 123, indicating these populations were in very good condition. Mean relative weight by length for black crappie ranged from 94 to 114, but only 83 to 95 for yellow perch. …

Review Of American Indian Grandmothers: Traditions And Transitions Edited By Marjorie M. Schweitzer, Paula Bennett

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

This well-researched and deeply warm series of essays is intended to acquaint readers with twentieth-century Indian grandmothers as familial bridges between past cultural embeddedness and an increasingly dismembered culture stretched from its roots in myth and practice. The essays range from sociological monographs replete with statistics to intimate first-hand interpretive accounts from the grandmothers themselves. The historical, geographic, and psychological breadth of the vignettes assures their appeal to a wide range of scholars and ethno-elderphiles.

Schweitzer emphasizes that even when biology is the triggering event for becoming a grandmother, the context of Indian grandmotherhood is culturally construed. Kinship patterns determine …

Review Of Standard Soil Methods For Long-Term Ecological Research Edited By G. Philip Robertson, David E. Coleman, Caroline S. Bledsoe, And Phillip Sollins, Mary Ann Vinton

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

Standard Soil Methods for Long-Term Ecological Research is the second in a series of books dedicated to summarizing the research results and methods of ecological studies being conducted at sites around North America and Antarctica under the sponsorship of the National Science Foundation's Long-Term Ecological Research (LTER) program. The twenty-one sites range from arctic tundra to hot desert and from natural tropical rainforest to urban and suburban areas.

Review Of The Last Prairie: A Sandhills Journal By Stephen R. Jones, Ron Block

Great Plains Quarterly (through 2013)

In The Last Prairie: A Sandhills Joumal, naturalist Stephen R. Jones provides an informed and passionate portrait of the Sandhills of western Nebraska, "the last remaining relic of the boundless grasslands that once extended from the Missouri River to the Rocky Mountains." These grass-fixed sand dunes have not only provided Jones with his subject but also a style, since these twenty essays are as graceful, diverse, and startling in their transitions as the Sandhills themselves.

A representative essay may begin in first person, emphasizing the sensual complexity of directly experiencing the Sandhills. But then by subtle shifts and turns, …