Life Sciences Commons^™

Urinary N-Acetyl-Beta-D-Glucosaminidase In Rheumatoid Arthritis, M P. Iqbal, A A. Ali, M A. Waqar, N Mehboobali

Department of Biological & Biomedical Sciences

Excretion of urinary N-acetyl beta-D-glucosaminidase (NAG) and its isoenzyme patterns were studied in two groups of patients with rheumatoid arthritis (RA) and in normal control subjects. Urine samples were collected from 30 seropositive RA patients, 19 seronegative RA patients, and 15 normal healthy subjects. All the patients and normal subjects were assessed to have normal liver and kidney functions. A small portion of the urine sample was dialyzed against 0.01 M phosphate buffer, pH 7.0 and NAG activity was monitored. Mean +/- SD values of urinary NAG in seropositive RA patients, in seronegative RA patients and in normal healthy subjects …

Hexapod Herald - Vol. 10, No. 8, September 30, 1998

Hexapod Herald and Other Entomology Department Newsletters

Faculty news

Publications

Graduate news

Travel

Museum news

Speakers: E. O. Wilson. October 13, 1998

Conferences

Calendar of events

The Occupation Of Farming, Bruce B. Johnson

Cornhusker Economics

Farming is one of the world’s oldest occupations. It has been hailed as one of the most noble of occupations by Thomas Jefferson and countless others throughout recorded history. Tilling the soil and husbanding the livestock as a resource steward in the seemingly-endless cycle of seasons, this remains in the minds of many as the basic stereotype of a farmer.

Samolus Parviflorus Raf., W. Nehrling

Specimens by Name

No abstract provided.

Structural Basis Of Activity And Subunit Recognition In G Protein Heterotrimers, Mark A. Wall, Bruce A. Posner, Stephen R. Sprang

Biological Sciences Faculty Publications

Background: Inactive heterotrimeric G proteins are composed of a GDP-bound α subunit (G(α)) and a stable heterodimer of G(β) and G(γ) subunits. Upon stimulation by a receptor, G(α) subunits exchange GDP for GTP and dissociate from G(βγ) both G(α) and G(βγ) then interact with downstream effectors. Isoforms of G(α), G(β) and G(γ) potentially give rise to many heterotrimeric combinations, limited in part by amino acid sequence differences that lead to selective interactions. The mechanism by which GTP promotes G(βγ) dissociation is incompletely understood. The Gly203→Ala mutant of G(iα1) binds and hydrolyzes GTP normally but does not dissociate from G(βγ) demonstrating …

Sunflower Seed Marketing Patterns In South Dakota: Regional Variations, Bashir Qasmi

Economics Research Reports (1969 - 2017)

U.S. Agriculture is going through a transition. Federal spending on farm programs is being curtailed and agricultural policies are being modified to make production of farm commodities responsive to market forces. In this competitive environment, efforts by the commodity groups for market development are becoming i:q.creasingly more important. However, to devise any market development plan for a commodity, understanding of the present status of the marketing system is important. At a minimum, one needs to know the methods of purchase and sale, types of buyers, shipment destinations, and transportation modes for the commodity. These aspects of grain marketing in South …

Simultaneous Formation Of Functional Leading And Lagging Strand Holoenzyme Complexes On A Small, Defined Dna Substrate, Anthony J. Berdis, Stephen J. Benkovic

Chemistry Faculty Publications

The biochemical characterization of leading and lagging strand DNA synthesis by bacteriophage T4 replication proteins has been addressed utilizing a small, defined primer/template. The ATP hydrolysis activity of 44/62, the clamp loading complex responsible for holoenzyme assembly, was monitored during assembly of both the leading and lagging strand holoenzyme complex. The ATPase activity of 44/62 diminishes once a functional holoenzyme is assembled on both the leading and lagging strand. The assembly of the lagging strand holoenzyme is facilitated by several factors including biotinylated streptavidin blocks at the end of the fork strands, preassembly of the leading strand holoenzyme, and by …

Cropwatch No. 98-23, Sept. 11, 1998, Lisa Brown Jasa

Crop Watch (1994–2005)

Inisde

Store grain on the ground as a last resort.........199

Corn diseases widespread..........199

Sooty stripe, zonate leaf spot in sorghum......... 200

Producer questions underlying economics of farming......... 200

Estimate grain amount to determine proper aeration system .........202

New book addresses dry grain aeration systems......... 202

Rust strikes alfalfa fields .........203

Existing farm buildings will need reinforcement for grain storage .........204

Proper air flow important to quality storage......... 205

Entomology offers distance graduate degree......... 206

Corn drying rapidly, maturing ahead of average .........206

Acer Negundo L., Bob Edgin

Specimens by Name

No abstract provided.

Habituation, Novelty Response, And Object Differentiation In The Weakly Electric Fish, Brachyhypopomus Pinnacaudatus, Gregory J. Scott

Dissertations and Theses

Weakly electric fish use a combination of active electrolocation and passive mechanosensory receptors for object detection and analysis. When tested with repeated presentations of the same moving object, Brachyhypopomus pinnacaudatus showed a gradual habituation of its electric organ pacemaker acceleration response (novelty response) that was unaltered by changes in the replacement electric organ discharge (S1). When tested with objects of differing velocities, the novelty response of the fish was proportional to the change in velocity of object. The responses of fish to objects that presented different mechanosensory profiles, but equal electrosensory profiles, suggest that the fish used the electrosensory system …

Meeting Minutes, September 8th, 1998, National Smokejumper Association Executive Committee

National Smokejumper Association Meeting Minutes

Agenda: Minutes: minutes of 18 Aug 98.; Treasurers Report: profits from sales of "Smokejumper" patch.; Establishing a checking account for merchandising.; Ownership of copyright on video.; Membership: review of numbers.; Old Business: volunteer trail maintenance program.; Target two crews for the summer of 1999.; Membership committee reported.; Ideas for increasing membership.; Converting 5 to 10 year memberships to a life membership.; Mission statement for the organization.; New Business: date for the 1999 annual meeting tentatively set.; An NSA contribution to the wild Land Fire Fighter Memorial.

Transport Of Axl2p Depends On Erv14p, An Er–Vesicle Protein Related To The Drosophila Cornichon Gene Product, Jacqueline Powers, Charles Barlowe

Dartmouth Scholarship

COPII-coated ER-derived transport vesicles from Saccharomyces cerevisiae contain a distinct set of membrane-bound polypeptides. One of these polypeptides, termed Erv14p (ER-vesicle protein of 14 kD), corresponds to an open reading frame on yeast chromosome VII that is predicted to encode an integral membrane protein and shares sequence identity with the Drosophila cornichon gene product. Experiments with an epitope-tagged version of Erv14p indicate that this protein localizes to the ER and is selectively packaged into COPII-coated vesicles. Haploid cells that lack Erv14p are viable but display a modest defect in bud site selection because a transmembrane secretory protein, Axl2p, is not …

Cropwatch No. 98-22, Sept. 4, 1998, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Crop update…………190

Storage options…………191

Moisture in storage…………191

Estimating corn yields…………192

Economics of storage…………194

Delayed pricing…………194

Bin preparation…………195

Cattle in corn…………196

Field storage…………196

Assessing on-farm storage…………197

Estimating corn maturity…………197

GDD data…………198

Grain Storage: Value, Costs, And Returns, Roger Selley

Cornhusker Economics

Promise of a good crop and low prices at harvest has increased the interest in storage. Many elevators are requiring that 20% or more of the grain be sold upon delivery or be placed under a deferred pricing contract so they can move the grain. Commercial storage rates are expected to be 2½ to 3 cents or more per bushel where available. Farm storage rental charges may approach commercial rates.

General Agreement On Tariffs And Trade (Gaff) And The World Trade Organisation (Wto): The Major Provisions And The Implication For Nigeria, O. A. Ogunlana

CBN Occasional Papers

This paper shall review the major provisions of the GATT with respect to the Multilateral Agreements on Trade in Goods only and the likely implications for Nigeria. The review of the General Agreement on Trade in Services and the Agreement on Trade - Related Aspects of Intellectual Property Rights shall be covered in another exercise. The rest of the paper is, therefore, organised into five parts. Part I discusses the GATT’s basic principles and the major agreements of the latest multilateral trade negotiations otherwise known as the Uruguay Round. The World Trade Organization, its major functions, structure and the decision-making …

Can Cover Crops Reduce Leafhopper Abundance In Vineyards?, Kent M. Daane, Michael J. Costello

Horticulture and Crop Science

In 3 of 4 vineyards we studied, late-season leafhopper density was lower on vines in cover cropped plots than in plots with no cover crops. However, the level of leafhopper reduction (about 15%) was rarely economically important and the mechanisms leading to reduction were not clear. For example, there were few differences in the number of leaf hopper predators or parasitoids on the vines in cover cropped versus no cover plots. However, there were significant between-treatment differences in vine growth. Plots with seasonwide maintenance of a cover crop and resident grasses had a reduction in vine vigor. Lower vine vigor …

Legume Logic Number 97

Legume Logic

Contents

Salinity and Western Australian agriculture

Fragile pulses?

Swathing lupins

Pulse points

Anthracnose and narrowleafed lupins

Crop-topping lupins

Diversity And Dominant Species Of Ground Beetle Assemblages (Coleoptera: Carabidae) In Crop Rotation And Chemical Input Systems For The Northern Great Plains, Michael M. Ellsbury, Janine E. Powell, Frank Forcella, W. David Woodson, Sharon A. Clay, Walter E. Riedell

Agronomy, Horticulture and Plant Science Faculty Publications

Dominant carabid species present in crops and crop rotation sequences commonly used in the northern Great Plains were assessed as an initial step toward the management of carabids as natural control agents. Ground beetle populations were determined by pitfall trapping in 4 crop rotation treatments maintained under high, managed, and low levels of chemical fertilizer and pesticide inputs. Diversity and species richness among crops, rotations, and input levels were compared using 3 indices—the Shannon-Weaver Index, relative diversity, and the Hierarchical Richness Index (HRI). Four carabid species, Cyclotrachelus altemans (Casey), Poecilvs lucublandus Say, Harpalns pensylvanicus (DeGeer), and Bembidion quadrimaculatum L., comprising …

Diversity And Dominant Species Of Ground Beetle Assemblages (Coleoptera: Carabidae) In Crop Rotation And Chemical Input Systems For The Northern Great Plains, Michael M. Ellsbury, Janine E. Powell, Frank Forcella, W, David Woodson, Sharon A. Clay, Walter E. Riedell

Agronomy, Horticulture and Plant Science Faculty Publications

Dominant carabid species present in crops and crop rotation sequences commonly used in the northern Great Plains were assessed as an initial step toward the management of carabids as natural control agents. Ground beetle populations were determined by pitfall trapping in 4 crop rotation treatments maintained under high, managed, and low levels of chemical fertilizer and pesticide inputs. Diversity and species richness among crops, rotations, and input levels were compared using 3 indices—the Shannon-Weaver Index, relative diversity, and the Hierarchical Richness Index (HRI). Four carabid species, Cyclotrachelus altemans (Casey), Poecilvs lucublandus Say, Harpalns pensylvanicus (DeGeer), and Bembidion quadrimaculatum L., comprising …

Medicaid Managed Care Contracting For Childhood Lead Poisoning Prevention Services, Elizabeth Wehr, Sara J. Rosenbaum

Center for Health Policy Research

This study reports on provisions relating to childhood lead poisoning prevention services in Medicaid managed care contract documents (service agreements and requests for proposals, RFPS). The provisions were extracted from the managed care contracts data base of the Center for Health Policy Research of the George Washington University Medical Center. The data base was constructed and is updated as part of the Center's ongoing analytic studies.' As with other Center studies of the contract documents, this is a descriptive study of how state Medicaid agencies addressed a series of contracting issues at a specific point in time.* In brief, we …

Table Of Contents Volume Nine, Number Four, Fall 1998, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)

Ecological Evaluation For The West Ash Creek Potential Research Natural Area, Pine Ridge Ranger Unit, Nebraska National Forest, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The West Ash Creek Potential Research Natural Area is located within pastures 6, 7, and 11 of the Pine Ridge Unit of the Nebraska National Forest ca 18 mi. (30 km) southwest of Chadron, Nebraska. The area consists of ca 1020 acres of mostly successional pine forest burned in a 1985 wildfire, with unburned forest, some grassland, and riparian canyon bottoms. The area is within the Pine Ridge ecosystem of the White River watershed in northwestern Nebraska. The area has remained ungrazed nearly continuously since 1986.

This document was prepared to provide the Forest Service with information to determine the …

Rapid Detection Of Listeria Monocytogenes In Dairy Samples Utilizing A Pcr-Based Fluorogenic 5′ Nuclease Assay, T. Cox, C. Frazier, J. Tuttle, S. Flood, L. Yagi, C. T. Yamashiro, R. Behari, C. Paszko, R. J. Cano

Biological Sciences

The presence of Listeria monocytogenes as a dairy food contaminant is a lethal threat to dairy industrialists; therefore, products tainted with L. monocytogenes must be quickly detected and removed from production. This fluorogenic PCR-based assay was developed to rapidly detect L. monocytogenes contamination in dairy samples before a final product is distributed. The detection method employed uses a PCR primer pair and a fluorogenic TaqMan probe which bind to a region of a virulence determinant gene specific to L. monocytogenes. As the DNA target is amplified, the 5′ nuclease activity of Taq DNA polymerase hydrolyzes the internal fluorogenic probe …

Is Population Genetics Mired In The Past?, Andrew J. Bohonak, Neil Davies, George K. Roderick, Francis X. Villablanca

Biological Sciences

No abstract provided.

A Half-Century Of Winter Bird Surveys At Lincoln And Scottsbluff, Nebraska, Paul A. Johnsgard

Papers in Ornithology

Since 1900, the National Audubon Society has sponsored annual "Christmas bird counts" during the two-week period encompassing Christmas; and as a result, long-term data on winter bird populations have accumulated, especially for some locations. The first two such counts in Nebraska were made in 1909 and in 1912 in Lincoln. Beginning in 1947 and continuing to the present, an unbroken series of counts were made in Lincoln, usually by members of the Uni¬versity Place Bird Club, the Audubon Naturalist's Club, or the Wachiska chapter of the National Audubon Society. For Scottsbluff, an unbroken set of counts extends from 1949 to …

Evolution And Animal Welfare, Marian Stamp Dawkins

Assessment of Animal Welfare Collection

Animal welfare is a topic often thought to reside outside mainstream biology. The complexity of the methods used to assess welfare (such as health, physiology, immunological state, and behavior) require an understanding of a wide range of biological phenomena. Furthermore, the "welfare" of an animal provides a framework in which a diversity of its responses can be understood as fitness-enhancing mechanisms. Different methods for assessing animal welfare are discussed, with particular emphasis on the role of an animal's own choices and reinforcement mechanisms. No part of biology is as yet able to explain consciousness, but by confronting the possibility that …

Whey Protein Edible Film Structures Determined By Atomic Force Microscope, L.E. Lent, L. S. Vanasupa, P. S. Tong

Dairy Science

Atomic force microscopy was used to study edible films produced from whey proteins. The films were imaged under ambient conditions with no special sample preparation. Low resolution imaging of areas from 10 μm to 150 μm on a side was performed in the contact mode. Higher resolution scans of 350 nm to 2,700 nm required use of the noncontact imaging mode. Features about the same size as the primary protein in whey, beta-lactoglobulin (7 nm), were identified in the film samples. Molecular aggregates in the range of 1 μm, reported in other studies using transmission electron microscopy of whey protein …

Final Report: Future Management Of The Aquatic Charter Industry In Western Australia., Tour Operators Fishing Working Group

Fisheries Management Papers

The Tour Operator's Fishing Working Group (TOFWG) was established by the Hon Monty House MLA, Minister for Fisheries, in recognition of the growing importance of this element of the tourism industy and in recognition of the need to ensure that the development of this industry occurs in an ecologically sustainable framework across the Sate. The recommendations outlined in this report establish a management framework within which the aquatic charter industry may continue to develop, and which will ensure the long-term sustainability of the natural resources on which the industry is based.

Continued Utilization Of Ccr5 Coreceptor By A Newly Derived T-Cell Line-Adapted Isolate Of Human Immunodeficiency Virus Type 1, Kathryn E. Follis, Meg Trahey, Rachel A. Lacasse, Jack H. Nunberg

Biological Sciences Faculty Publications

The differential use of CC chemokine receptor 5 (CCR5) and CXC chemokine receptor 4 (CXCR4) may be intimately involved in the transmission and progression of human immunodeficiency virus infection. Changes in coreceptor utilization have also been noted upon adaptation of primary isolates (PI) to growth in established T-cell lines. All of the T-cell line-adapted (TCLA) viruses studied to date utilize CXCR4 but not CCR5. This observation had been suggested as an explanation for the sensitivity of TCLA, but not PI, viruses to neutralization by recombinant gp120 antisera and V3-directed monoclonal antibodies, but recent studies have shown coreceptor utilization to be …

Bowen Ratio Estimates Of Evapotranspiration For Tamarix Ramosissima Stands On The Virgin River In Southern Nevada, D. A. Devitt, Anna Sala, S. D. Smith, J. Cleverly, L. K. Shaulis, R. Hammett

Biological Sciences Faculty Publications

A Bowen ratio energy balance was conducted over a Tamarix ramosissima (saltcedar) stand growing in a riparian corridor along the Virgin River in southern Nevada, Measurements in two separate years were compared and contrasted on the basis of changes in growing conditions. In 1994, a drought year, record high temperatures, dry winds, and a falling water table caused partial wilt of outer smaller twigs in the canopy of many trees in the stand around the Bowen tower. Subsequently, evapotranspiration (ET) estimates declined dramatically over a 60-day period (11 mm d(-1) to <1 mm d(-1)). In 1995, the Virgin River at the Bowen tower area changed its course, hydrologically isolating the Tamarix stand in the vicinity of the tower. In 1996, a 25% canopy loss was visually estimated for the Tamarix growing in the area of the tower. Higher soil temperatures relative to air temperatures were recorded in 1996 in response to this loss in canopy, With a more open canopy, thermally induced turbulence was observed in 1996, On day 160 of 1996, a 28 degrees C rise over a 9-hour period was correlated with increased wind speeds of greater than 4 m s(-1). Subsequently, higher ET estimates were made in 1996 compared to 1994 (145 cm versus 75 cm), However, the energy balance was dominated by advection in 1996, with latent energy flux exceeding net radiation 65% of the measurement days compared to only 11% in 1994, We believe this advection was on a scale of the floodplain (hundreds of meters) as opposed to regional advection, since the majority of wind (90%) was in a N-S direction along the course of the river, and that a more open canopy allowed the horizontal transfer of energy into the Tamarix stand at the Bowen tower. Our results suggest that Tamarix has the potential to be both a low water user and a high water user, depending on moisture availability, canopy development, and atmospheric demand, and that advection can dominate energy balances and ET in aridland riparian zones such as the Virgin River.