Digital Commons Network^™

Oxidized Amino Acids In Lens Protein With Age: Measurement Of O-Tyrosine And Dityrosine In The Aging Human Lens, Mary C. Wells-Knect, Thomas G. Huggins, Daniel G. Dyer, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

The concentrations of ortho-tyrosine (o-Tyr) and dityrosine (DT) were measured in noncataractous human lenses in order to assess the role of proteinoxidation reactions in the aging of lens proteins. The measurements were conducted by selected ion monitoring-gas chromatography/mass spectrometry using deuterium-labeled internal standards, which provided both high sensitivity and specificity for the quantitation of o-Tyr and DT. Between ages 1 and 78 years, the o-Tyr concentration in lens proteins varied from 0.3 to 0.9 mmol of o-Tyr/mol of Phe (n = 19), while DT ranged from 1 to 3 mumol of DT/mol of Tyr (n = 30). There were no …

The Cytotoxic Effect Of Tropical Plants On Human And Rat Hepatoma Cells, Mark Tafazoli

Honors Capstone Projects and Theses

No abstract provided.

Paper Abstracts, Association Of Christians In The Mathematical Sciences

ACMS Conference Proceedings 1993

Paradigm Shifts in the Mathematical Sciences

John Muir Newsletter, Summer 1993, John Muir Center For Regional Studies

Muir Center Newsletters (1981-2015)

John Muir Newsletter summer 1993 university of the pacific volume 3, number 3 JOHN MUIR IN THE ION BASIN by Laurel Bemis (Editor's note: a Stockton resident and recent graduate of the University of the Pacific, the author prepared this paper in a course offered by UOP's history department, "John Muir and the American Environment. " Excerpts from the John Muir Papers at UOP are used by permission of the Muir-Hanna Trust.) John Muir left New York on April 20, 1911 on a voyage that would fulfill his lifetime dream to travel to South America. One of his main reasons …

The Influence Of Reservoir Basin Morphometry On Phytoplankton Community Structure, Richard L. Meyer, G. Keith Trost

Arkansas Water Resources Center Technical Reports

The research protocol was designed to compare three reservoirs with similar physical environments but different morphometry. Three reservoirs on the western edge of the Ozark uplift were selected because of their similar substrate and climatic condition. The reservoirs primarily differed in morphometry. Two of the reservoirs were of identical size, Bob Kidd and Prairie Groves Lakes, but of different configuration, semicircular and linear, respectively. The bifurcated lake, Lincoln Lake, was of smaller size. Each lake is dimictic. Each of the lakes were nitrate-N limited while soluble reactive phosphorus-P is available and not restricting the growth of phytoplankton. Although the pattern …

The Prairie Naturalist Volume 25. No. 2. June 1993

The Prairie Naturalist

Paul B. Kannowski, Editor

Nikki R. Seabloom, Assistant Editor

Douglas H. Johnson, Book Review Editor

CONTENTS

RAPID GROWTH OF CHANNEL CATFISH IN FLAMING GORGE RESERVOIR, WYOMING ▪ C. B. Alexander and W. A. Hubert

MANAGEMENT EVALUATION OF BODY CONDITION AND POPULATION SIZE STRUCTURE FOR PADDLEFISH: A UNIQUE CASE ▪ M L. Brown and B. R. Murphy

DISTRIBUTION OF THE RIBBON LEECH IN NORTH DAKOTA ▪ C. M. Pennuto and M. G. Butler

SELENIUM IN EARED GREBE EMBRYOS FROM STEWART LAKE NATIONAL WILDLIFE REFUGE, NORTH DAKOTA ▪ M. M. Olson and D. Welsh

USING GEOGRAPHIC VARIATION TO PREDICT BREEDING LOCALES OF …

Toxics Use Reduction: Pro And Con, Francine Laden, George M. Gray

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

With the Massachusetts Toxics Use Reduction Act as an example, important issues related to the goals and effectiveness of TUR are examined. The benefits as claimed by proponents are contrasted with shortcomings outlined by opponents in point-counterpoint style. Ultimately, the authors call for more balanced analysis.

The Probe, Issue 133 - June 1993

The Probe: Newsletter of the National Animal Damage Control Association

CONTENTS:
ADC Eastern Region Highlights and Initiatives
Access to Information
Wildlife Hazards at Airports
CALENDAR OF UPCOMING EVENTS
Animal Rights Position Statement Issued by Minnesota
Hunters Should Check Local Requirements Before Planning Out-of-State Forays
New Live Trap Available
NADCA Nominating Committee Needs Members
Berry man Institute Dedicated
Get Your NADCA Hats Here!
Publications Available
Proceedings Available
Membership Votes Dues Increase
NRA Internships Available
Aquaculture Initiatives
Endangered Species Protection and Wildlife Enhancement

Proceedings Of The Fourth Western Black Bear Workshop, United States Department Of The Interior, National Park Service

Wildlife Conservation and Management

The status of black bears in North America ranges from pest to threatened. The species appears relatively secure throughout most parts of its range except the southeastern coastal plain; in this region a number of disjunct populations exist on primarily publicly owned lands. Concern over the status of Ursus americanus luteolus led to a petition to list this subspecies under the Endangered Species Act. The Endangered Species Act is arguably the most important wildlife legislation in recent years. However, applying this valuable, but young, untested, and evolving legislation to the black bear subspecies is judged unwarranted and premature because of …

Effect Of Drying On Cyromazine Loss From Surface-Applied Caged-Layer Manure, T. C. Daniel, D. H. Pote, D. R. Edwards

Arkansas Water Resources Center Technical Reports

In Arkansas, much of the environmental concern related to water quality has focused on the high volume of poultry fecal waste spread on the surf ace of local pastures to fertilize forage grass. Cyromazine (N-cyclopropyl-1,3,5-triazine-2,4,6- triamine), a feed-through larvicide used to control house flies (Musca domestica), is often a component of caged-layer manure. Cyromazine is quite soluble and stable in water, and previous research has shown that it can be readily washed from pasture plots by intense rainfall. Therefore, a study was conducted to evaluate increased drying time as a best management practice technique for reducing cyromazine runoff losses from …

Computer Simulation Model Calibration And Validation For Prediction Of Water Quality Impacts Of Poultry Waste Disposal, D. R. Edwards, T. C. Daniel

Arkansas Water Resources Center Technical Reports

Runoff and water quality data collected from two pairs of grazed fields in northwestern Arkansas were analyzed to support efforts to model runoff quality from areas receiving poultry manure and other fertilizer sources. The monitoring period described in this report was September 1, 1991 to April 30, 1993. One of each pair of fields was fertilized with inorganic fertilizer, and the other received either poultry litter or manure. Losses of fertilizer constituents were quite low from an agronomic standpoint, ranging from approximately 2-11 kg N/ha/year and 0.5-4.1 kg P04-P/ha/year. Annual losses of fertilizer constituents were dominated by only a small …

Thermally Activated Escape Over Fluctuating Barriers, Ulrich Zürcher, Charles R. Doering

Physics Faculty Publications

We investigate the thermally activated escape of a Brownian particle over a potential barrier whose height fluctuates with a rate α between the values E+ and E−. We are mainly interested in the low-temperature behavior where E+/T≫E−/T. We calculate the mean exit time as a function of the rate of the barrier fluctuations for the piecewise linear and the piecewise constant barrier, τ=τ(α). For the piecewise constant potential we find three different regimes: τ∼τ+ for α<τ−1+=exp(-E+/T), τ∼2τ− for α>τ−1−=exp(-E−/T), and τ∼α−1 for τ−1+<α<τ−1−. The mean exit time for the piecewise linear potential has a different behavior for fast barrier fluctuations, α>τ−1−; τ(α) is a monotonously increasing function that approaches the asymptotic value τ∼ √τ+τ− for α→∞. We show that …

Fisheries Research Report No.100 - The Impact Of Trawling For Saucer Scallops And Western King Prawns On The Benthic Communities In Coastal Waters Off South-Western Australia, L. J.B. Laurenson, P. Unsworth, J. W. Penn, R. C.J. Lenanton

Fisheries Research Reports

A two year study was undertaken to collect data for the assessment of the impact of the saucer scallop and western king prawn trawl fisheries on the benthic communities in coastal waters off south western Australia, between 31°20'5 and 34°23'5 latitude.

Monitoring of reported commercial landings, on-board sampling of commercial catches, research vessel trawl surveys, experimental and exploratory trawling, and underwater television observations, have enabled the development of an extensive data-base on the fishery and benthic communities of the region.

These data indicate that the existing fishery operates on a number of relatively small, discrete grounds where saucer scallops or …

Water Current, Volume 25, No. 1, June 1993

Water Current Newsletter

Water Resources Tour Set to See State's Sites in July
From the Director: Award of Two National Grants Reflects High Level of Activity
New Communications Associate Joins Staff at UNL Water Center
Coalition Issues Agenda
Michigan Video Illustrates Local Wellhead Program
Students Issue Verdict on Dam
Call for Papers
Danube Damming Project Controversial
Study on Sandhills Available
Soil and Water Sciences Tour Features Labs, Urban Water Sites
New Water Organization Formed
UNL Soil Scientist Conducts Pilot Study
FishAmerica Offers Grants
Book Tells History of Nebraska and Its Water
Festival to Celebrate State's Natural Resources

Anns An X Window Based Version Of The Afit Neural Network Simulator, Ching-Seh Wu

Theses and Dissertations

This thesis presents an X Window based neural network simulation environment developed at Air Force Institute of Technology (AFIT) using the techniques of modern software engineering. This artificial neural network simulator is a tool running on Sun SPARCstations and supporting two user modes: end-users and client-programmers. End-users interact with neural network paradigms developed by client-programmers for the purpose of studying and analyzing the execution of a particular Neural Network (NN) paradigm, or class of NN algorithms. Client programmers maintain the system and use this environment for the development of new NN paradigms or algorithms for end-users. The development follows a …

Comparison Of Predicted And Observed Dioxin Levels In Fish: Implications For Risk Assessment, Judy S. Lakind, Daniel Q. Naiman

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

After comparing sampled and modelled dioxin levels in the tissue of fish near pulp and paper mill discharges, the authors argue that, until an improved bioaccumulation model is incorporated into EPA's Risk assessment process, determination of human health Risks associated with consuming dioxin-contaminated fish should be based on sampling.

The 1981, 1986, And 1990 Long Term Plans Of The Department Of Computer Sciences, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

Arkansas Rice Research Studies 1992, B. R. Wells

Arkansas Agricultural Experiment Station Research Series

The research reports in this publication represent one year of results; therefore, these results should not be used as a basis for longterm recommendations. Several research reports in this publication dealing with soil fertility also appear in Arkansas Soil Fertility Studies 1992, Arkansas Agricultural Experiment Station Research Series 425. This duplication is the result of the overlap in research coverage between the two series and our effort to inform Arkansas rice producers of all the research being conducted with funds from the rice check-off.

Measurement Of The Microwave Dielectric Constant For Low‐Loss Samples With Finite Thickness Using Open‐Ended Coaxial‐Line Probes, G. Q. Jiang, W. H. Wong, E. Y. Raskovich, W. G. Clark, W. A. Hines, Jeff Sanny

Physics Faculty Works

This work addresses the effect of finite sample thickness on microwave dielectric constant measurements for thin, planar, low-loss samples using the open-ended coaxial-line probe method. Detailed measurements of the dielectric constant were carried out on a wide range of thicknesses of air samples which were backed by infinitely thick teflon and alumina dielectric media. The measurements were made at room temperature for various (50 Ω) coaxial-line dimensions, microwave frequencies 4-8 GHz, and power levels near a fraction of a mW. The results provide strong support for previously published theoretical calculations based on a boundary value problem which uses a spectral …

The Effects Of Composting Of Yard Wastes On The Ground-Water Quality: Wmu Farms Site, Kalamazoo, Michigan, Bryan Kirk Allen

Masters Theses

In the rush to find alternatives to landfilling of yard waste, federal and state agencies have identified composting as the main solution. There is therefore a need to address the possible environmental problems which could be associated with such composting operations. Compost may contain nutrients, organic acids, pesticides, and metals which could leach through soils to the ground water posing a potential contamination problem.

At the WMU Farms Site, two sites have been used for the composting of leaves by the City of Kalamazoo. The physical and chemical hydrogeology of these sites were characterized.

The results suggest that the presence …

Water Resources Review - June 1993 Vol 6 No. 2, Annis Water Resources Institute

AWRI Reviews

No abstract provided.

Classification Of Patterns In Eeg Recordings : A Comparison Of Back-Propagation Networks Vs. Predictive Autoencoder Networks, Brian Armieri

Theses

Recent research exploring the use of neural networks for electro-encephalogram (EEG) pattern classification has found that a three-layer back-propagation network could be successfully trained to identify high voltage spike-and-wave spindle (HVS) patterns caused by epileptic seizures (Jando et. al., in press). However, there is no reason to predict that back-propagation is the best possible network architecture for EEG classification. A back-propagation neural network and a predictive autoencoder neural network were compared to determine which network was better at correct classifying both HVS and non-HVS patterns.

Both networks were able to classify 88%-89% of all patterns using a limited set of …

Recursive Soft Morphological Filters, Padmaja Puttagunta

Theses

Mathematical morphology which is based on set-theoretic concept, extracts object features by choosing a suitable structuring shape as a probe. Morphological filters are set operations that transform an image into a quantitative description of its geometrical structure: Appropriately used, they can eliminate noises or irrelevancies while preserv¬ing the details of the original image. The applications of morphological filters in image processing and analysis are numerous, which include shape recognition, industrial parts inspection, nonlinear filtering, and biomedical image processing.

Soft morphological filters are used for smoothing signals with the advantage of being less sensitive to additive noises and to small variations …

Mixed Culture Biodegradation Of Pentachlorophenol, Hexachlorobenzene, And Tetrachloromethane Under Anaerobic Conditions, Jesse Zahn

Theses

Three chlorinated compounds, namely, Pentachlorophenol(PCP), Hexachlorobenzene (HCB), and Carbon tetrachloride were biodegraded under anaerobic conditions using a (CCl₄)mixed culture obtained from an anaerobic sewage sludge digestor in Linden, NJ.

Three sets of cultures capable of degrading each of the target compounds were established. Primary Enrichment Cultures (PECs) from the anaerobic sludge were exposed to each one of the target compounds. The cultures were able to degrade each target compound as follows: HCB, 0 to 1.2 ppm; PCP from 0 to 3-4 PPM; CCl₄, 0.5 to 15.5 PPM

One culture from each PEC group (CCl₄, …

Bayesian Methods In Preoperative Risk Assessment For Cardiac Surgery, Huey-Chung Teng

Theses

Many strides have been made in the last decade to improve the accuracy of preoperative risk estimation, particular for cardiovascular surgery. It is our goal to estimate the preoperative risk associated with cardiac bypass surgery for patients in different risk categories. These risk categories are determined by the Parsonett model.

The Parsonett model assigns a risk value to a range of risk factors consisting of patient attributes and disease parameters. Logistic modeling is applied to generate a comprehensive risk function. The database being utilized contains over 3,000 patients who have had cardiovascular surgery within the last 5 years.

This thesis …

Photochemistry Of Nitrous Acid And Nitrite Ion, Kathryn E. Shanks '93

Honors Projects

Research is currently underway to elucidate the photochemical decomposition mechanism of nitrous acid and nitrite ion in aqueous and non-aqueous media. The quantum yield of the photochemical disappearance of nitrous acid and nitrite, as a function of pH and nitrous acid/nitrite ion concentration ratios, was examined. Spectroscopic studies have been done with nitrite ion in various aprotic organic solvents. Similar work has been started with molecular nitrous acid that was produced in aqueous solution and then extracted into organic solvents. These organic solvents were employed in order to study the quantum yield with respect to NO2- and HONO without the …

Diagnosis Of Malignant Melanoma Using A Neural Network, Anurag Chawla, Fikret ErçAl

Computer Science Technical Reports

Malignant melanoma is the deadliest form of all skin cancers. Approximately 32,000 new cases of malignant melanoma were diagnosed in 1991, with approximately 80 percent of patients expected to survive five years [1], Fortunately, if detected early, even malignant melanoma may be treated successfully. Thus, in recent years, there has been a rising interest in the automated detection and diagnosis of skin cancer, particularly malignant melanoma [2]. In this thesis, a novel neural network approach for the automated distinction of melanoma from three benign categories of tumors which exhibit melanoma-like characteristics is presented. The approach is based on devising new …

The Design, Analysis, And Implementation Of Parallel Simulated Annealing And Parallel Genetic Algorithms For The Composite Graph Coloring Problem, Brent S. Elmer, Billy E. Gillett

Computer Science Technical Reports

The composite graph coloring problem (CGCP) is similar to the standard graph coloring problem (SGCP). Associated with each vertex of a composite graph is a positive integer which represents the chromaticity of that vertex. This number is the number of consecutive integers (colors) which must be assigned to the vertex. The goal of the CGCP is to color the graph with as few colors as possible. The largest integer used in the coloring is called the chromatic number of the graph. The CGCP is proven to be NP-complete.

Exact, heuristic, and stochastic methods are analyzed and compared. Exact methods are …

Development Of New Methods For Assessing Solidification/Stabilization Of Hazardous Waste Using Solid-State Nuclear Magnetic Resonance Techniques (Ph.D Dissertation, Lsu), Michael A. Janusa

Faculty Publications

New methods for assessing solidification/stabilization (S/S) of hazardous waste using solid-state nuclear magnetic resonance are developed for the purpose of diagnosing on a microscopic level the performance of S/S as a hazardous waste disposal technique. There are four techniques developed and described in this dissertation: (1) Solid-state deuterium NMR spectroscopy is used to determine if a particular deuterated organic waste is effectively solidified/stabilized and to determine the lower limit of the bond strength between the waste and the cement matrix; (2) Constant time pulsed field gradient ^ NMR spectroscopy is tested on a liquid waste encapsulated within a solidified matrix …

Center For Sustainable Agricultural Systems Newsletter, May/June 1993

Center for Sustainable Agricultural Systems: Newsletter (1993–2000)

Contents:

Sustainable Ag Tour

ERS Sustainable Ag Initiative

Highlights from "Farm Bill" Seminar Series

Rural Policy Symposium Proceedings

SARE Grant Programs

SARE Funding - Chapters 2 & 3

Sustainable Agriculture Directory of Expertise

Integrated Farm Projects - ARDC

Study of Farm Family Health

Conference on Science and Sustainability