Digital Commons Network^™

Loading Microcolumns For The Separation Of Analytes From A Sample In The Millisecond Time Scale, David S. Hage, William A. Clarke

David Hage Publications

The present invention generally relates to a microcolumn capable of separating an analyte from a sample in the millisecond time domain. The microcolumn is capable of such rapid separation by employing small column volumes that can tolerate medium to high flow rates. The invention also relates to a method of loading a microcolumn capable of separating an analyte from a sample in the millisecond time domain using plural injections of the packing material.

Mylanodon Rosei, A New Metacheiromyid (Mammalia: Palaeanodonta) From The Late Tiffanian (Late Paleocene) Of Northwestern Wyoming, Ross Secord, Philip D. Gingerich, Jonathan I. Bloch

Department of Earth and Atmospheric Sciences: Faculty Publications

Mylanodon rosei is a new genus and species of late Paleocene metacheiromyid palaeanodont from a new late Tiffanian locality, Y2K Quarry, in the Clarks Fork Basin, Wyoming. The type is an adult dentary with P₄ and a molariform double-rooted M₁. This provides the first evidence that molariform teeth were retained in early Metacheiromyidae. A second specimen is a juvenile dentary with a partial P₃ and an unerupted P₄. This is the first juvenile dentition known for a Paleocene metacheiromyid. The new specimens enable determination of dental homologies. Reduction of teeth in early metacheiromyids took …

Differential Lipid Biosynthesis Underlies A Tradeoff Between Reproduction And Fl Ight Capability In A Wing-Polymorphic Cricket, Zhangwu Zhao, Anthony J. Zera

Anthony Zera Publications

The biochemical basis of life-history tradeoffs is a poorly studied aspect of life-history evolution. We used radiotracer and endocrine approaches to investigate the extent to which morphs of a wing-polymorphic insect differ in the biosynthesis of lipid classes important for dispersal capability vs. reproduction (ovarian growth). The flightcapable genotype of Gryllus firmus biosynthesized a greater amount of total lipid and triglyceride (main flight fuel), which was preferentially allocated to somatic tissue during early adulthood. By contrast, the fl ightless genotype biosynthesized a significantly greater amount of phospholipid (important in egg development), which was preferentially allocated to ovaries. Topical application of …

A New Genus Of Flea Beetles From The Greater Antilles (Coleoptera: Chrysomelidae), Alexander S. Konstantinov

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

The new genus Normaltica and two new species (N. obrieni from Puerto Rico and N. iviei from the Dominican Republic) are described and illustrated. A key and illustrations of these taxa are pro- vided. Morphological consequences of wing reduction are discussed. Variability of N. obrieni is illustrated and discussed.

Dec 2002, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Report from Director on Leave Development Projects Liason Report

Taxonomy And Distribution Of Butterflies (Papilionoidea) Of The Skardu Region, Pakistan, Muhammad Abbas, Muhammad Ather Rafi, Mian Inayatullah, Muhammad Rafique Khan, Harry Pavulaan

The Taxonomic Report of the International Lepidoptera Survey

A study was conducted in six different localities around Skardu, Pakistan to document the butterfly fauna of that region. The study revealed that 16 species in 5 families and 14 genera occur in the area. The families include: Papilionidae (represented only by the genus Parnassius); Pieridae (genera Pieris, Pontia, and Colias are represented); Lycaenidae (genera Lycaena, Everes, Aricia, Plebejus, Zizeeria, and Zizina are represented); Nymphalidae (only two genera, Aglais and Cynthia are represented); and Satyridae (represented by the genera Pararge and Maniola).

Breed Comparisons Of Angus, Brahman, Hereford, Pinzgauer, Sahiwal, And Tarentaise For Weight, Weight Adjusted For Condition Score, Height, And Body Condition Score, Jesus Arango, L. V. Cundiff, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Data from topcross cows (n = 468) from six breeds of sire (Angus, Brahman, Hereford, Pinzgauer, Sahiwal, Tarentaise) and two breeds of dam (Angus and Hereford) of Cycle III of the Germplasm Evaluation (GPE) program at the U.S. Meat Animal Research Center (MARC) comprising cow weight (CW, n = 9,012), height (CH, n = 9,010), and condition score (CS, n = 8,991) recorded in four seasons per year from 2 to 6 yr of age were used to estimate breed-group differences. The mixed models included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and …

Breed Comparisons Of Angus, Charolais, Hereford, Jersey, Limousin, Simmental, And South Devon For Weight, Weight Adjusted For Body Condition Score, Height, And Body Condition Score Of Cows, Jesus Arango, L. V. Cundiff, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Breed means and differences for weight (CW, n = 19,851), height (CH, n = 14,553), and condition scores (CS, n = 19,536) recorded in four seasons per year were evaluated for 881 cows ranging from 2 to 7 yr of age from Cycle I of the Germplasm Evaluation Program at the U.S. Meat Animal Research Center. Cows were straightbred Herefords and Angus and top-crosses from mating of Hereford, Angus, South Devon, Jersey, Simmental, Limousin, and Charolais sires to Hereford and Angus dams. The model included cow age, season of measurement, and their interactions, with year of birth, pregnancy-lactation (PL) code, …

Comparisons Of Angus-, Braunvieh-, Chianina-, Hereford-, Gelbvieh-, Maine Anjou-, And Red Poll-Sired Cows For Weight, Weight Adjusted For Body Condition Score, Height, And Body Condition Score, Jesus Arango, L. V. Cundiff, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Data from Angus, Hereford, and topcross cows (n = 641) from 2- to 8-yr-old daughters of seven breeds of sires included in Cycle II of the Germplasm Evaluation Program at the U.S. Meat Animal Research Center, comprising cow weight (CW, n = 15,698), height (CH, n = 15,676), and condition score (CS, n = 15,667), were used to estimate breed-group differences. Data were recorded in four seasons of each year (1975 to 1982). The mixed model included cow age, season of measurement, and their interactions, year of birth, pregnancy-lactation code (PL), and breed-group as fixed effects for CW and CS. …

Estimates Of Genetic Parameters And Genetic Change For Reproduction, Weight, And Wool Characteristics Of Columbia Sheep, Kathryn J. Hanford, L. Dale Van Vleck, G. D. Snowder

Department of Animal Science: Faculty Publications

Genetic parameters from both single-trait and bivariate analyses for prolificacy, weight and wool traits were estimated using REML with animal models for Columbia sheep from data collected from 1950 to 1998 at the U.S. Sheep Experiment Station (USSES), Dubois, ID. Breeding values from both single-trait and seven-trait analyses calculated using the parameters estimated from the single-trait and bivariate analyses were compared with respect to genetic trends. Number of observations were 31,401 for litter size at birth and litter size at weaning, 24,741 for birth weight, 23,903 for weaning weight, 29,572 for fleece weight and fleece grade, and 2,449 for staple …

Genetic Parameters For Weight, Weight Adjusted For Body Condition Score, Height, And Body Condition Score In Beef Cows, Jesus Arango, Larry V. Cundiff, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Weight (CW, n = 61,798), weight adjusted for condition score (WA), hip height (CH, n = 56,494), and condition score (CS, n = 61,434) of cows (2 through 8 yr of age) produced by crosses of 22 sire breeds with Angus and Hereford dams in the first four cycles of the Germplasm Evaluation (GPE) Program at the U.S. Meat Animal Research Center were used to estimate genetic parameters with REML. The model included sire breed, dam breed, age in years, season of measurement (1 to 4) and their interactions, and year of birth and pregnancy-lactation code (PL) as fixed effects …

Estimates Of Parameters Between Direct And Maternal Genetic Effects For Weaning Weight And Direct Genetic Effects For Carcass Traits In Crossbred Cattle, R. K. Splan, Larry V. Cundiff, M. E. Dikeman, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Estimates of heritabilities and genetic correlations were obtained for weaning weight records of 23,681 crossbred steers and heifers and carcass records from 4,094 crossbred steers using animal models. Carcass traits included hot carcass weight; retail product percentage; fat percentage; bone percentage; ribeye area; adjusted fat thickness; marbling score, Warner- Bratzler shear force and kidney, pelvic and heart fat percentage. Weaning weight was modeled with fixed effects of age of dam, sex, breed combination, and birth year, with calendar birth day as a covariate and random direct and maternal genetic and maternal permanent environmental effects. The models for carcass traits included …

Blackbirds And Corn In Ohio, Richard A. Dolbeer

United States Department of Agriculture Wildlife Services: Staff Publications

Damage to corn by blackbirds (Icteridae) has been an economic problem throughout historical times in North America. Ohio, with the highest nesting season population density of red-winged blackbirds (Agelaius phoeniceus) in North America and large acreages of corn, has been a key State in this conflict. Surveys of damage from 1968 to 1979 revealed that blackbirds annually destroyed less than 1% of the corn crops in Ohio, a 4- to 6-million dollar loss at 1979 prices. This total dollar loss is somewhat misleading because of the uneven distribution of damage among fields. Over 97% of the cornfields in Ohio receive …

Evaluation Of Lasers To Disperse American Crows, Corvus Brachyrhynchos, From Urban Night Roosts, W.P. Gorenzel, B. F. Blackwell, G.D. Simmons, T.P. Salmon, R.A. Dolbeer

United States Department of Agriculture Wildlife Services: Staff Publications

American crows (Corvus brachyrhynchos) have a long history of causing agricultural damage in North America. Shooting and bombing at crow night roosts have been employed to reduce such damage. Most roosts were located in rural locations, but in the latter half of the 1900s crows began to roost in urban locations. Urban crow roosts are presently a nationwide problem in the United States. Thousands of crows at a roost create problems for businesses and residents. Improved control techniques are needed. Lasers have been used in Europe to scare and disperse birds but the technique has only recently received formal testing. …

The Insulation Of Genes From External Enhancers And Silencing Chromatin, Bonnie Burgess-Beusse, Catherine Farrell, Miklos Gaszner, Michael Litt, Vesco Mutskov, Felix Recillas - Targa, Melanie Simpson, Adam West, Gary Felsenfeld

Department of Biochemistry: Faculty Publications

Insulators are DNA sequence elements that can serve in some cases as barriers to protect a gene against the encroachment of adjacent inactive condensed chromatin. Some insulators also can act as blocking elements to protect against the activating influence of distal enhancers associated with other genes. Although most of the insulators identified so far derive from Drosophila, they also are found in vertebrates. An insulator at the 5′ end of the chicken β -globin locus marks a boundary between an open chromatin domain and a region of constitutively condensed chromatin. Detailed analysis of this element shows that it possesses …

Selection For Maternal Behavior In Mice—Direct And Correlated Responses, Chung-Feng Chiang, Rodger K. Johnson, Merlyn K. Nielsen

Department of Animal Science: Faculty Publications

Three generations of divergent selection for a maternal care index (MCI) in mice were practiced in each of three replicates. MCI was recorded for 29–32 dams and litters in each replicate/line subclass. Pups of the top (or bottom) 6– 10 dams in each replicate, depending on number of females in the litters, were selected in high (H) and low (L) MCI lines. At birth, litters with more than 10 pups were standardized to 10 pups whereas litters with no more than 10 pups remained intact. On day 4, 8, 12, and 16 of lactation, time budgets during a 30-min session …

Bolboceras Kirby, 1819 (July) (Insecta, Coleoptera): Proposed Precedence Over Odonteus Samouelle, 1819 (June), Mary Liz Jameson, H. F. Howden

University of Nebraska State Museum: Entomology Papers

The purpose of this application, under Articles 23.9.3 and 8 1.2.3 of the Code, is to conserve the generic name Bolboceras Kirby, 1819 for a group of scarab beetles (family GEOTRUPIDAE) by giving it conditional precedence over the older name Odonteus Samouelle, 18 19 whenever they are considered to be synonyms. The name Bolboceras is threatened by a single usage by Krelljn 1990 of the otherwise unused name Odonteus.

Center For Grassland Studies Center, Winter 2002, Volume 8, No. 1

Center for Grassland Studies: Newsletters

Study Shows Importance of Biodiversity to Grasslands

Managing Prairies for Biodiversity by Chris Helzer, The Nature Conservancy

2002-2003 Nebraska Ranch Practicum

2002 Nebraska Range Shortcourse by Lowell Moser, Department of Agronomy and Horticulture, UNL

The Role Of Climate In Modern Water Planning And Related Decisions: Nebraska Case Study, Donna L. Woudenberg

Open Access Master's Theses (through 2010)

Climate and weather play an integral role in the planning and decision-making processes for those involved in agricultural and natural resource fields. This project was conducted to determine whether climate and weather data are being efficiently and effectively used in these processes.

A survey was mailed to those who work in water-related fields in Nebraska and post-survey interviews were conducted to obtain greater detail. Survey results were analyzed in the following three ways: as a whole; stratified by respondent’s agency; and stratified by the educational background of respondents. It was found that climate and weather data are more likely to …

Crab Louse Infestation In Pre-Columbian America, F. M. Rick, G. C. Rocha, K. Dittmar, C. E. A. Coimbra Jr., Karl J. Reinhard, F. Bouchet, L. F. Ferreira, A. Araújo

School of Natural Resources: Faculty Publications

Until now, Pthirus pubis infestation in ancient human populations had only been recorded in the Old World. We found crab lice on South American mummified bodies from the Atacama Desert region. Crab louse eggs were found attached to the pubic hairs of a 2,000-yr-old Chilean mummy. Well-preserved adults were found in sediment and clothing from a Peruvian mummy dated 1,000 yr ago. Paleoparasitological evidence expands the knowledge of the distribution of this ectoparasite in ancient populations. As with many other parasites, pubic lice recorded in Andean populations show the antiquity of this parasite in the New World. It is likely …

Water Current, Volume 34, No. 6. December 2002

Water Current Newsletter

• UNL Aquaculturist Sees Fish Farming Niche in Empty Hog Barns by Steve Ress

• From the Director

• Meet the Faculty

• The Army Corps’ Missouri River Mission by Brig. Gen. David A. Fastabend

• Water News Briefs

Ard News December 2002

Agricultural Research Division: News and Annual Reports

CONTENTS:

Comments from the ARD Office Staff
How to State the Value of Your Research
Proposals Submitted for Federal Grants
Grants and Contracts Received October and November, 2002
ARD Budget Reductions - Round 3
Undergraduate Honors Research Program
Recognition of Junior Faculty for Excellence in Research
ARD-Administered Grant and Awards Programs

Convergent Demographic Effects Of Insect Attack On Related Thistles In Coastal Vs. Continental Dunes, John L. Maron, Julie K. Combs, Svata M. Louda

School of Biological Sciences: Faculty Publications

Insect herbivory is common, but the conditions under which it reduces the fitness and population size of plants remain poorly understood. We quantified populationlevel impacts of floral herbivory by specialized insects on cobweb thistle (Cirsium occidentale var. occidentale) in a California coastal dune ecosystem, and then compared these demographic effects to those published for Platte thistle (Cirsium canescens) in similarly designed exclusion experiments in the continental sand dune ecosystem in the Great Plains. As a separate test of the strength of the seed-to-seedling linkage, we quantified seedling establishment rates in seed addition plots and compared these …

Contrasting Patterns Of Divergence In Quantitative Traits And Neutral Dna Markers: Analysis Of Clinal Variation, Jay F. Storz

Jay F. Storz Publications

Clinal variation in quantitative traits is often attributed to the effects of spatially varying selection. However, identical patterns can be produced by the interplay between purely stochastic processes (i.e. drift in combination with spatially restricted gene flow). One means of distinguishing between adaptive and nonadaptive causes of geographical variation is to compare relative levels of between population divergence in quantitative traits and neutral DNA markers. Such comparisons can be used to test whether levels of trait divergence attributable to additive genetic effects (as measured by Q_ST) exceed null expectations based on the level of divergence at neutral marker …

A New Species Of The Beetle Genus Brachypsectra From The Dominican Republic, With Fossil Connections (Coleoptera: Brachypsectridae), Robert E. Woodruff

Insecta Mundi

With the description of Brachypsectra vivafosile n. sp., from the Cabo Rojo desert area of Hispaniola, the beetle family Brachypsectridae now contains 4 described species. The family was originally known from the Dominican Republic by Miocene amber fossils of larvae. Genitalia are illustrated for the first time for the family. Relationships of the family within the Elateroidea are briefly discussed.

Distribution And Biological Notes For Some Cerambycidae (Coleoptera) Occurring In The Southeastern United States, Roy F. Morris Ii

Insecta Mundi

The beetle family Cerambycidae is a favorite of many collectors and has been the focus of studies in the southeastern United States. Recent collecting has revealed significant new biological and distribution information for 33 cerambycid species. Included are five new state records and one new country record. Host plants are reported for the first time for 31 species. Unless otherwise stated all collections were made by the author. Rearing was done by collecting infested plant material and placing it in individual clear plastic tubs, which were checked regularly for emerging specimens. Moisture was supplied from a plastic spray bottle as …

A New Species Of Ceroplastes From Florida (Hemiptera: Coccoidea: Coccidae), Greg Hodges

Insecta Mundi

Previous literature recognized twenty species of wax scales occurring in the Neartic region with nine of those occurring in Florida. This number has grown recently with the establishment of the Ceroplastes rusci and the discovery of C. feltyii (new species). A description and illustration of C. feltyii is provided along with a key to all of the wax scales currently found in Florida.

Three Bostrichid Beetles New To Florida (Coleoptera: Bostrichidae), Robert L. Beiriger

Insecta Mundi

Three species of bostrichid beetles, previously unknown from Florida, were found in the Florida State Collection of Arthropods (FSCA) and in the Archbold Biological Station Collection. The genus Stephanopachys Waterhouse, in Florida, is now represented by four species. These new records probably represent infrequently collected species and not new introductions to Florida. A key to all species of Stephanopachys adults from Florida is presented.

Luchoelmis, A New Genus Of Elmidae (Coleoptera) From Chile And Argentina, P. J. Spangler, C. L. Staines

Insecta Mundi

Luchoelmis New Genus is described with four new species: aequalis, magallanensis, and penai from Chile and cekalovici from Argentina and Chile. Luchoelmis penai is designated as the type species of the genus. A key to the four species is presented.

Extended Visions November-December 2002

Extended Visions Newsletter (ARDC)

No abstract provided.