Digital Commons Network^™

Ec02-173 Spotted And Diffuse Knapweed, Neil L. Heckman, Ryan M. Goss, Roch E. Gaussoin, Stevan Z. Knezevic, John L. Lindquist

University of Nebraska-Lincoln Extension: Historical Materials

Spotted knapweed (Centaure amaculosa Lam. = C. biebersteinii DC.) and diffuse knapweed (C.diffusa Lam.) are two of Nebraska’s seven noxious weeds. They are also noxious in at least 17 other states. These are closely related species that are well adapted to a variety of habitats including open forests, rangelands and pastures, Conservation Reserve Program lands, roadsides, and ditch banks. Centaurea is a large genus of over 400 species, 32 of which are common weeds of the United States and several of which [e.g., yellowstar thistle, C. solstitalis L, and Russian knapweed, C. repens L. =Acroptilon repens (L.) …

Sorting And Mixing Effects In A Wean-To-Finish Facility, Mike Brumm

Nebraska Swine Reports

An experiment was conducted to evaluate whether removing and mixing lightweight pigs in a wean-to-finish facility resulted in improved pig performance to slaughter compared to never removing pigs from a pen from weaning to slaughter. Two populations of pigs were compared. The removed and mixed population consisted of pens comprised of 1) 20 pigs per pen with the five lightest pigs removed three weeks after weaning and 2) 15 pigs per pen with the pen comprised of the five lightest pigs from three of the 20 pig pens. The unsorted population consisted of 15 pigs per pen from weaning to …

Economic Analysis Of The Selection Response In The Ne Index Line, D. B. Petry, B. P. Mcallister, Rodger K. Johnson

Nebraska Swine Reports

The objective was to estimate economic effects of 19 generations of selection for increased litter size in the NE Index line. Using realized biological data, 1,250-sow enterprises based on Index line and Control line females were simulated. Each system was closed to introduction of females and included pureline females mated to produce replacement pureline and F₁ gilts, and F₁ females mated to terminal cross boars to produce market progeny. Costs of production and income statements were produced using the reproductive, growth and carcass data from the NE Index (I) and Control (C) lines reported in the two preceding …

An Integrated Approach To Cultivar Evaluation And Selection For Improving Sugar Beet Profitability, Robert M. Harveson, G. L. Hein, J. A. Smith, Robert G. Wilson, C. Dean Yonts

Panhandle Research and Extension Center

Sugar beets in the United States are produced in 12 states within four diverse geographic regions. The greatest volume of production occurs in the Upper Midwest and includes Minnesota and North Dakota. This area produced 48% of the crop on 300,000 ha (758,000 acres) in 2000. The second largest production area is the Far West and includes California, Idaho, Oregon, and Washington. This region produced 22% of the crop on 138,000 ha (354,000 acres). The Great Plains region, consisting of Colorado, Montana, Nebraska, and Wyoming, produced 18% of the crop on 108,000 ha (271,000 acres). Finally, the Great Lakes region, …

Life History And Laboratory Rearing Of Pseudometapterus Umbrosus (Heteroptera: Reduviidae) With Descriptions Of Immatures Stages, Jeffrey Bradshaw, J. E. Mcpherson

Panhandle Research and Extension Center

The life history of the emesine reduviid Pseudometapterus umbrosus (Blatchley) was studied in southern Illinois from February 1999 to November 2000, and the immature stages were described. The bug also was reared from egg to adult under controlled laboratory conditions. This univoltine species occurred on the rock faces of sandstone bluffs often in association with plants and spider webs. Adults and nymphs preyed primarily on small flies. Adults overwintered within fallen leaves on the bluff outcroppings, emerged in early April, and began feeding and reproducing shortly thereafter. Eggs were found from early May to late October and were deposited on …

Arktos: An Intelligent System For Satellite Sea Ice Image Analysis, Leen-Kiat Soh

School of Computing: Technical Reports

We present an intelligent system for satellite sea ice image analysis named ARKTOS (Advanced Reasoning using Knowledge for Typing Of Sea ice). The underlying methodology of ARKTOS is to perform fully automated analysis of sea ice images by mimicking the reasoning process of sea ice experts and photo-interpreters. Hence, our approach is feature-based, rule-based classification supported by multisource data fusion and knowledge bases. A feature can be an ice floe, for example. ARKTOS computes a host of descriptors for that feature and then applies expert rules to classify the floe into one of several ice classes. ARKTOS also incorporates information …

Implementation And Validation Of Range Imaging On A Uhf Radar Wind Profiler, P. B. Chilson, Tian-You Yu, Richard G. Strauch, Andreas Muschinski, Robert D. Palmer

Department of Electrical and Computer Engineering: Faculty Publications

The available range resolution of pulsed radar wind profilers is usually limited by bandwidth restrictions. Range imaging (RIM) has recently been developed as a means of mitigating these limitations by operating the wind profilers over a small set of distinct transmitter frequencies. A constrained optimization method can then be used to generate high-resolution maps of the reflectivity field as a function of range. This paper presents a description of how the RIM technique has been recently implemented on the Platteville 915-MHz tropospheric profiler, the first such implementation at UHF. Examples of data collected during a two-part experiment on 10 April …

Intermittent Turbulence Associated With A Density Current Passage In The Stable Boundary Layer, Jielun Sun, Sean P. Burns, Donald H. Lenschow, Robert Banta, Rob Newsom, Richard Coulter, Stephen Fraiser, Carmen Nappo, Joan Cuxart, William Blumen, Xuhui Lee, Xin-Zhang Hu

United States Department of Commerce: Staff Publications

Using the unprecedented observational capabilities deployed during the Cooperative Atmosphere-Surface Exchange Study-99 (CASES-99), we found three distinct turbulence events on the night of 18 October 1999, each of which was associated with different phenomena: a density current, solitary waves, and downward propagating waves from a low-level jet. In this study, we focus on the first event, the density current and its associated intermittent turbulence. As the cold density current propagated through the CASES-99 site, eddy motions in the upper part of the density current led to periodic overturning of the stratified flow, local thermal instability and a downward diffusion of …

Adaptive Inference For Distinguishing Credible From Incredible Patterns In Nature, C. S. Holling, Craig R. Allen

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Strong inference is a powerful and rapid tool that can be used to identify and explain patterns in molecular biology, cell biology, and physiology. It is effective where causes are single and separable and where discrimination between pairwise alternative hypotheses can be determined experimentally by a simple yes or no answer. But causes in ecological systems are multiple and overlapping and are not entirely separable. Frequently, competing hypotheses cannot be distinguished by a single unambiguous test, but only by a suite of tests of different kinds, that produce a body of evidence to support one line of argument and not …

Biodiversity Of Fungi In Red Imported Fire Ant (Hymenoptera: Formicidae) Mounds, Jennifer A. Zettler, Thomas M. Mcinnis Jr., Craig R. Allen, Timothy P. Spira

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

The red imported fire ant, Solenopsis invicta Buren, became established in North America more than 70 yr ago, and it currently occupies most of the southeastern United States. Fire ants change the physical and chemical components of soil, which likely infuence soil fungi in ant mounds. To determine the effects of fire ants on soil fungi, we sampled soil from fire ant mounds and the surrounding nonmound soil. In addition, we sampled soil from the nests of the native ant Aphaenogaster texana carolinensis Wheeler. We found that both fire ant mounds and native ant nests had greater fungal abundance but …

A New Species Of Hybochaetodus Arrow (Coleoptera: Scarabaeoidea: Hybosoridae: Anaidini) From Peru, Federico C. Ocampo

University of Nebraska State Museum: Entomology Papers

Abstract
Hybochaetodus flaco Ocampo, new species, from Cusco, Peru is described and illustrated. The genus Hybochaetodus now includes two species, H. flaco and H. obscurus Arrow, both from Peru. The two species are compared and a diagnosis for the genus Hybochaetodus Arrow is provided.

Resúmen
Se describe e ilustra Hybochaetodus flaco Ocampo, especie nueva, de Cusco, Peru. El género Hybosorus ahora incluye dos especies H. flaco y H. obscurus, ambas de Perú. Se compara las dos especies y se provee una diagnosis del genero Hybochaetodus.

Tragopan: Newsletter Of The Wpa/Species Survival Commission/Birdlife Pheasant Specialist Group 16 (2002), World Pheasant Association, Birdlife International, Iucn Species Survival Commission Pheasant Specialist Group

Galliformes Specialist Group and Affiliated Societies: Newsletters

Issue 16 (March 2002)

Editorial, Stuart Marsden

From the Chairman, Peter Garson

Cheer pheasant drawing, Dave Showler

Project roundup

News from PSG

Action Plan project review

Other news

Newly published

Research reports

Some notes on behaviour in golden pheasant Chrysolophus pictus, Liang Wei, Zheng Guangmei, Zhang Zhengwang, and Ding Changqing

Studies on habitat selection and home range of Reeves 's pheasant Syrmaticus reevesii using radiotracking techniques: Report on the progress of a WPA project, Zhang Zhengwang

Research on Sclater's monal in westem Yunnan, China: APA progress report, July to December 2001, Han Lianxian

The status and distribution of green peafowl …

Wpa News 70 (2002/2003), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (Winter 2002/2003), number 70

Published by the World Pheasant Association

Nebline, January 2002

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Salt Valley Clean Lakes Project Benefits Area Lakes
Wood For Your Fireplace
Recognizing Living, Hazardous Trees
Needle Diseases of Conifers
New Arsenic Standards Won’t Affect Lancaster Public Water Supplies
Beginning Beekeeping Workshop
Considering Ultrasonic Pest Control Devices? Save Your Money
Keeping Backyard Birds Safe
Check Condition of Stored Grain
Fertilizing Crop Land With Biosolids
Testing Feed and Balancing Rations Saves Money
Farm Management Web Page Added
“Care and Feeding” of Your Septic Tank
Frozen Pipes
Prevent Home Fires
One Diet You Just Can’t Fail
Eating Healthy: Enjoy Nebraska Foods
Seniors Rewarded with Feast
Clean Hands Campaign
Clarice’s Column
Household Hints …

Canadian Cooperative Wildlife Health Centre Newsletter, Volume 8-2, Winter 2001/2002

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

Wildlife Technician - Western/Northern Regional Centre The Research Group for Arctic Parasitology (RGAP): Heading North with CCWHC Enhanced Passive Surveillance for West Nile Virus Infection in Wild Birds in Canada - 2001 Foot and Mouth Disease and Canadian Wildlife Raptor Tissue Collection Barbiturate poisoning in a bald eagle Newcastle Disease in pigeons, Prince Edward Island Tuberculosis in a Thick-billed Murre Lyme Disease in NewfoundlandType C Botulism Outbreak on the Shore of the St Lawrence Suspected cyanide poisoning in birds Type E botulism, Lake Erie Parvovirus in raccoons Canine Distemper Virus in mustelids: Canine Newcastle Disease and Avian Cholera in Cormorants …

Office Of Research And Graduate Studies -- Annual Report 2001/2002

Office of Research and Economic Development: Publications

03/04 Nanotechnology
05/06 Research Highlights
07/08 Biomedical Research
09/10 Children, Families & Education
11/12 Initiatives
13/14 Genomics
15/16 Research Centers
17/18 Graduate Studies
19/20 Technology Transfer

When I came to the University of Nebraska–Lincoln last year, I was not only impressed by the faculty and administration, but inspired by the potential to move UNL research to a new level of excellence. In the past fiscal year, we’ve experienced exceptional growth. Our total sponsored programs awards grew 25 percent, which is a direct result of our strategic initiatives that provide new resources, leverage existing resources, develop grantsmanship skills and increase collaborations …

Teaching Biology Using Agriculture As The Context: Perceptions Of High School Students, Mark Balschweid

Department of Agricultural Leadership, Education, and Communication: Faculty Publications

The purpose of this study was to determine how high school students perceived science and agriculture after completing a yearlong biology class that used animal agriculture as the context. This study utilized a case-study approach. The population for the study included all students who participated in a biology course utilizing animal agriculture as the context for teaching biology (N=531). More than 90% of the subjects reported they agreed or strongly agreed that participating in a biology class that used agriculture as the context helped them understand the relationship between science and agriculture. Over 85% of those responding agreed or strongly …

Department Of Veterinary And Biomedical Sciences: 2002 Annual Report

School of Veterinary and Biomedical Sciences: Information and History

Foreword 2002
VBMS Faculty
VBMS Faculty and Staff, by Function and Unit
Honors. Awards and Recognitions. 2002
VBMS Committee Assignments. 2002
Faculty Profiles
VBMS Research Associates Profiles
VBMS Teaching Program
Great Plains Veterinary Educational Center (GPVEC)
VBMS Research Program
International Activities
Veterinary Extension Program
Nebraska Veterinary Diagnostic Laboratory Systems (NVDLS)
VBMS Grants and Contracts Program
Patents by VBMS Faculty in 2002
Publications by VBMS Faculty
Presentations by VBMS Faculty
Articles Regarding the Department
Selected Committees. Editorial and Other Appointments
Departmental Budget Summaries
Nebraska Agricultural Statistics

The Drug Sensitivity And Transmission Dynamics Of Human Malaria On Nias Island, North Sumatra, Indonesia, D. J. Fryauff, B. Leksana, S. Masbar, I. Wiady, P. Sismadi, A. I. Susanti, H. S. Nagesha, Eijkman Institute For Molecular Biology, S. Atmosoedjono, M. J. Bangs, J. Kevin Baird

United States Public Health Resources

Nias Island., off the north-western coast of Sumatra, Indonesia, was one of the first locations in which chloroquine-resistant Plasmodium vivax malaria was reported. This resistance is of particular concern because its ancient megalithic culture and the outstanding surfing conditions make the island a popular tourist destination. International travel [0 and from the island could rapidly spread chloroquine-resistant strains of P. vivax across the planet. The threat posed by such strains, locally and internationally, has led to the routine and periodic re-assessment of the efficacy of antimalarial drugs and transmission potential on the island. Active case detection identified malaria in 124 …

Centers For Disease Control And Prevention 2000 Growth Charts For The United States: Improvements To The 1977 National Center For Health Statistics Version, Cynthia L. Ogden, Robert J. Kuczmarski, Katherine M. Flegal, Zuguo Mei, Shumei Guo, Rong Wei, Laurence M. Grummer-Strawn, Lester R. Curtin, Alex F. Roche, Clifford L. Johnson

United States Public Health Resources

Objective. To present a clinical version of the 2000 Centers for Disease Control and Prevention (CDC) growth charts and to compare them with the previous version, the 1977 National Center for Health Statistics (NCHS) growth charts.

Methods. The 2000 CDC percentile curves were developed in 2 stages. In the first stage, the empirical percentiles were smoothed by a variety of parametric and nonparametric procedures. To obtain corresponding percentiles and z scores, we approximated the smoothed percentiles using a modified LMS estimation procedure in the second stage. The charts include of a set of curves for infants, birth to 36 months …

Pathogenesis Of Human And Bovine Cryptosporidium Parvum In Gnotobiotic Pigs, Sonia J. Pereira, Norma E. Ramirez, Lihua Xiao, Lucy A. Ward

United States Public Health Resources

To compare the pathogenesis of human genotype 1 (HuGl) and bovine genotype 2 (BoG2) Cryptosporidium parvum, neonatal gnotobiotic pigs were given 1-10 HuGl or BoG2 oocysts. The prepatent and patent periods were significantly longer for HuGl than for BoG2 C. parvum (prepatent, 8.6 vs. 5.6 days; patent, 16.6 vs. 10.3 days). BoG2-infected pigs developed signif- icantly more severe disease than did HuGl-infected pigs. BoG2 parasites were seen micro- scopically throughout the intestines during the prepatent and patent periods. HuGl parasites were only detected during the patent period in the ileum and colon but colonized the mucosal surface in significantly …

A Preliminary Linkage Map Of The Tick, Ixodes Scapularis, Amy J. Ullmann, Joseph Piesman, M.C. Dolan, William C. Black, Iv

United States Public Health Resources

A linkage map of the Ixodes scapularis genome was constructed based upon segregation amongst 127 loci. These included 84 random amplified polymorphic DNA (RAPD) markers, 32 Sequence-Tagged RAPD (STAR) markers, 5 cDNAs, and 5 microsatellites in 232 F₁ intercross progeny from a single, field-collected P₁ female. A preliminary linkage map of 616 cM was generated across 14 linkage groups with one marker every 10.8 cM. Assuming a genome size of ∼10⁹ bp, the relationship of physical to genetic distance is ∼300 kb/cM in the I. scapularis genome.

Anopheles Gambiae Genome: Completing The Malaria Triad, Kathryn S. Aultman, Michael Gottlieb, Maria Y. Giovanni, Anthony S. Fauci

United States Public Health Resources

The genome sequence of Anopheles gambiae, the major mosquito vector of the malaria parasite Plasmodium falciparum, as well as analyses of its gene content and organization, are reported by several teams of investigators in this issue. In addition, the sequence of the P. falciparum genome appears in this week’s issue of Nature. The genomes of these two organisms, along with that of the human, provide a triad of critical genetic information relevant to all stages of the malaria transmission cycle and offer unprecedented opportunities to the scientific and public health communities engaged in the fight against malaria, …

Real-Time Fluorescence Pcr Assays For Detection And Characterization Of Shiga Toxin, Intimin, And Enterohemolysin Genes From Shiga Toxin-Producing Escherichia Coli, Udo Reischl, Mohammad T. Youssef, Jochen Kilwinski, Norbert Lehn, Wen Lan Zhang, Helge Karch, Nancy Strockbine

United States Public Health Resources

PCR assays have proved useful for detecting and characterizing Shiga toxin-producing Escherichia coli (STEC). Recent advances in PCR technology have facilitated the development of real-time fluorescence PCR assays with greatly reduced amplification times and improved methods for the detection of amplified target sequences. We developed and evaluated two such assays for the LightCycler instrument: one that simultaneously detects the genes for Shiga toxins 1 and 2 (stx₁ and stx₂) and another that simultaneously detects the genes for intimin (eae) and enterohemolysin (E-hly). Amplification and sequence-specific detection of the two target genes were …

Increased Hippocampal Volume In Schizophrenics' Parents With Ancestral History Of Schizophrenia, Josette G. Harris, David A. Young, Donald C. Rojas, Ana Cajade-Law, Ann Scherzinger, Safia Nawroz, Lawrence E. Adler, C. Munro Cullum, Jack Simon, Robert Freedman

United States Public Health Resources

Objective: Decreased hippocampal volume is one of the hypothesized pathological features of schizophrenia, but it is not known if this abnormality is familially transmitted. The aim of this study was to measure the hippocampal volume of the parents of schizophrenic probands. in relationship to the apparent transmission of genetic risk.
Method: Eighteen subjects from families consisting of a schizophrenic proband and two clinically unaffected parents were studied. Probands were compared to six control subjects, matched for age, sex, and educational level. The six families were selected so that only one parent had an ancestral family history of schizophrenia. The volumes …

Inhibition Of Hepatic Stellate Cell Collagen Synthesis By N-(Methy1amino)Isobutyric Acid, Thomas L. Freeman, Kusum K. Kharbanda, Dean Tuma, Mark Milliard

United States Public Health Resources

The increased deposition of extracellular matrix by hepatic stellate cells following liver injury, in a process known as activation, is considered a key mechanism for increased collagen content of liver during the development of liver fibrosis. We report that N- (methylamino)isobutyric acid (MeAIB), a specific inhibitor of System A-mediated amino acid uptake, reduces the accumulation of collagen in CFSC-2G hepatic stellate cell cultures and in a rat model of liver injury and fibrosis. Rat CFSC-2G cells were cultured in 0-5 mM MeAIB, and the accumulation and synthesis of collagen were measured by binding to Sirius red F3B and pulse-labeling with …

Effect Of Malondialdehyde-Acetaldehyde-Protein Adducts On The Protein Kinase C-Dependent Secretion Of Urokinase-Type Plasminogen Activator In Hepatic Stellate Cells, Kusum K. Kharbanda, Kris A. Shubert, Todd A. Wyatt, Michael F. Sorrell, Dean J. Tuma

United States Public Health Resources

Previous studies from our laboratory have shown that malondialdehyde-acetaldehyde-protein adducts (MAA adducts) are formed in hepatocytes of ethanol-fed rats and directly influence the hepatic stellate cells (HSCs) to induce their secretion of chemokines and to up-regulate their expression of adhesion molecules. Since protein kinase C (PKC) is known to play a major role in many diverse intracellular signal transduction processes, we investigated whether MAA adducts influence the function of HSCs via a PKC-dependent pathway. HSCs in culture were exposed to MAA adducts, and PKC activity was determined. We observed a time- and concentration-dependent activation of PKC when cultures were exposed …

Ata2-Mediated Amino Acid Uptake Following Partial Hepatectomy Is Regulated By Redistribution To The Plasma Membrane, Thomas L. Freeman, Geoffrey M. Thiele, Dean J. Tuma, Tina K. Machu, Mark E. Mailliard

United States Public Health Resources

System A, the Na⁺-dependent amino acid transport activity, is encoded by the ATA2 gene and up-regulated following partial hepatectomy (PH), and its competitive inhibition interferes with liver regeneration. Rabbit polyclonal antibody was raised against a portion of the ATA2 gene product followed by immunodetection of ATA2 in isolated liver plasma membrane and lysate. The level of ATA2 increased in the plasma membrane following PH, while the relatively high quantity of ATA2 found in liver lysate remained constant. We also have shown that Northern analysis of steady-state ATA2 mRNA revealed no significant change following PH. These data show that …

Susceptibility Of Raccoons (Procyon Lotor) To Infection With Mycobacterium Bovis, Mitchell V. Palmer, W. Ray Waters, Diana L. Whipple

Michigan Bovine Tuberculosis Bibliography and Database

Tuberculosis due to Mycobacterium bovis infection is endemic in white-tailed deer (Odocoileus virginianus) in the northeastern portion of the lower Michigan peninsula (USA). Various wild carnivores and omnivores, including raccoons (Procyon lotor), are infected with M. bovis within the endemic area. To investigate the pathogenesis of tuberculosis in raccoons and the likelihood of M. bovis transmission from infected raccoons to other susceptible hosts, we experimentally inoculated raccoons with single oral doses of M. bovis (ranging from 30 to 1.7 x 10⁵ colony forming units [CFU]), five daily oral doses of M. bovis (ranging from 10 …

The National Honors Report, Volume Xxiii, Number 3, Fall 2002

The National Honors Report

Peaks & Valleys

Those Pesky Parents

1. "Parent to Parent" by P.K.Weston ... 1 Let those parents know what they need to know: inevitable changes in their sons and daughters; practical issues; the program's responsibilities in their children's education. Includes letter to parents & copy of the program outline with notes. Weston says to borrow freely.

2. "From Fred's Mother" ... 5 This letter has been reprinted several times to remind us what honors is all about. Fred's mother says "teach my son." Introduction by Freddye Davy, Hampton University. As always, thanks for sharing this letter, Freddye.

Those Irksome Issues …