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Articles 59911 - 59940 of 65047
Full-Text Articles in Entire DC Network
Water Quality Monitoring (1988 To 1991) At The Iowa Academy Of Science's Parish Farm, Grundy County, Iowa, Brenda K. Nations, George R. Hallberg
Water Quality Monitoring (1988 To 1991) At The Iowa Academy Of Science's Parish Farm, Grundy County, Iowa, Brenda K. Nations, George R. Hallberg
Journal of the Iowa Academy of Science: JIAS
In May 1988 sampling was initiated to evaluate water quality in relation to management practices at Parish Farm, which is owned by Iowa Academy of Science. Initial results showed tile-line effluent to have high concentrations of nitrate-nitrogen (N03-N). Twelve monitoring wells were installed over a one year period to analyze shallow groundwater at the farm. The wells, tile lines, and surface water were sampled monthly, through October, 1991, and the water analyzed for N03-N and some pesticides. N03-N concentrations varied, related to landuse and management of adjacent areas. Greater N03-N concentrations were …
Winter/Spring Population Characteristics Of White-Tailed Deer In An Agricultural/Wetland Complex In Northeastern South Dakota, Brian J. Kernohan
Winter/Spring Population Characteristics Of White-Tailed Deer In An Agricultural/Wetland Complex In Northeastern South Dakota, Brian J. Kernohan
Electronic Theses and Dissertations
Habitat preference, cover characteristics of corn, movements, and sexual segregation patterns of white-tailed deer (Odocoileus virginianus) were evaluated at Sand Lake National Wildlife Refuge (SLNWR) in winter (January - March) and spring (April - June), 1993 and 1994. An average of 20 radio-collared deer were monitored per season, which resulted in 4, 058 relocations. Habitat preference was assessed using 95 and 50% home range contours that were estimated using an adaptive kernel method. Agricultural crops (i.e., corn [Zea mays], row crops other than corn [e.g., soybeans [Glycine max]], small grains [e. g., wheat [Triticum aestivum]], and alfalfa [Medicago sativa]) were …
Winter Diet And Nutritional Condition Of White-Tailed Deer In The Northern Black Hills, South Dakota, Robert G. Osborn
Winter Diet And Nutritional Condition Of White-Tailed Deer In The Northern Black Hills, South Dakota, Robert G. Osborn
Electronic Theses and Dissertations
Habitat deterioration in the northern Black Hills (NBH) of South Dakota may be responsible for declining white-tailed deer (Odocoileus virginianus) population levels (Griffin et al. 1992). Because of the relationship between habitat and nutrition, a two-year research project was initiated in January 1992 to evaluate the physical and nutritional condition of white-tailed deer inhabiting five NBH winter subranges. Habitat variables were measured at 100 random locations on each study area. Pellet groups were collected throughout each study area at two-week intervals during January, February, and March 1992 and 1993. Five female white-tailed deer were collected from each study area in …
Water Quality And Fecal Indicator Bacteria, Mark S. Coyne
Water Quality And Fecal Indicator Bacteria, Mark S. Coyne
Soil Science News and Views
How can you tell if water is fit to drink? Color and taste aren't reliable guides for water safety. Clear water can be contaminated with chemicals or microorganisms the senses can't detect. One of the principle qualities of potable (drinkable) water is its freedom from microbial contaminants. This article will describe some criteria and methods that are used to determine the microbial quality of water.
The Fecal Coliform/Fecal Streptococci Ratio (Fc/Fs) And Water Quality In The Bluegrass Region Of Kentucky, Mark S. Coyne, J. M. Howell
The Fecal Coliform/Fecal Streptococci Ratio (Fc/Fs) And Water Quality In The Bluegrass Region Of Kentucky, Mark S. Coyne, J. M. Howell
Soil Science News and Views
In the mid 70' s, someone noticed that the ratio of two indicator bacteria in fecal wastes - fecal coliforms (FC) and fecal streptococci (FS) - was characteristic of particular animal wastes. In human wastes, the fecal coliform/fecal streptococci ratio (FC/FS ratio) was greater than 4. In domesticated animals, like cattle, the ratio was between 0.1 and 4.0. In wild animals, the ratio was less than 0.1. Since that time, many attempts have been made to use the ratio to determine the source of fecal bacteria in contaminated ground water.
Agricultural Impacts On Fecal Contamination Of Shallow Groundwaters In The Bluegrass Region Of Kentucky, Mark S. Coyne, J. M. Howell
Agricultural Impacts On Fecal Contamination Of Shallow Groundwaters In The Bluegrass Region Of Kentucky, Mark S. Coyne, J. M. Howell
Soil Science News and Views
Any farming practices that degrade water quality contribute to agricultural nonpoint source pollution. This is a problem in Kentucky's Bluegrass region where shallow soils and karst geology permit surface contaminants to reach groundwater quickly. Real and perceived threats to public health may make groundwater protection plans a reality if evidence for non-point source pollution in agricultural areas continues to grow.
Research Reports From Status Report: Identification Of Appropriate Standards For Corrective Action For A Release From Petroleum Underground Storage Tanks, G. Blomquist, Lyle V. A. Sendlein, Thomas Tobin, T. W. Struttmann, James S. Dinger, Paul M. Mcginley, Burl Naugle, Robert Guthries, Ralph R. Huffsey
Research Reports From Status Report: Identification Of Appropriate Standards For Corrective Action For A Release From Petroleum Underground Storage Tanks, G. Blomquist, Lyle V. A. Sendlein, Thomas Tobin, T. W. Struttmann, James S. Dinger, Paul M. Mcginley, Burl Naugle, Robert Guthries, Ralph R. Huffsey
KWRRI Research Reports
This document is a collection of research reports:
- Cost of Closure and Remediation for Petroleum Underground Storage Tanks
- Assessment of Number and Distribution of USTs
- Analysis of Potable Water Sources in Kentucky
- Analysis of Well Data and Soil Parameters as Related to the STATSGO Kentucky General Soil Map
- Petroleum Products: Chemical Composition, Tocxicological and Environmental Data
- Health Risk Analysis for Selected Petroleum Compounds
- Summary of Analytical Methods
- Soil Volume Calculations for UST Installations
- Generic Organic Containment Pathway Analysis for Components of Petroleum in Soil and Groundwater
Chemical And Statistical Analysis Of A Sampled Interval In The Camp Nelson Limestone (Upper Ordovician) Madison County, Central Kentucky, Garland R. Dever Jr., Warren H. Anderson, Henry E. Francis, O. Barton Davidson, Mark F. Thompson
Chemical And Statistical Analysis Of A Sampled Interval In The Camp Nelson Limestone (Upper Ordovician) Madison County, Central Kentucky, Garland R. Dever Jr., Warren H. Anderson, Henry E. Francis, O. Barton Davidson, Mark F. Thompson
Information Circular--KGS
The Camp Nelson Limestone of the High Bridge Group (Upper Ordovician) is mined at seven sites in central and north-central Kentucky for industrial, construction, and agricultural uses. As part of a regional investigation of its chemical characteristics, a 67-foot section in the upper Camp Nelson, which is being mined at Boonesborough, Madison County, was sampled for major-element analysis.
The upper Camp Nelson in the Boonesborough Mine consists of two zones (23 and 30 feet thick) of low-silica stone (4 percent or less total SiO2) separated by a 14-foot section of slightly argillaceous limestone with an average silica content …
Effect Of Reservoir Function On Water Quality And Phytoplankton In Lake Taylorville, Christian County, Illinois, Scott Warren Phipps
Effect Of Reservoir Function On Water Quality And Phytoplankton In Lake Taylorville, Christian County, Illinois, Scott Warren Phipps
Masters Theses
As is true for most reservoirs in agricultural areas, Lake Taylorville is currently impacted by excess sedimentation. A system of floodplain wetlands, holding ponds, and sediment basins is being constructed on the tributaries to the reservoir in effort to reduce sediment and nutrient loads. A comprehensive twelve-month assessment of water quality has been conducted to provide a baseline for evaluating the success of this restoration project and to allow predictions regarding future management strategies.
In reservoirs, a continuum of longitudinal gradients result in the establishment of three distinct zones possessing unique physical, chemical and biological properties. The function of these …
A Comparison Of Wellhead Protection Area Delineation Methods At Larimore, North Dakota, Barbara L. Sahl
A Comparison Of Wellhead Protection Area Delineation Methods At Larimore, North Dakota, Barbara L. Sahl
Theses and Dissertations
Many communities in North Dakota rely on water from shallow, unconfined aquifers that are vulnerable to contamination. A strategy to protect public groundwater supplies is the delineation of wellhead protection areas (WHPAs) around the area which contributes water to a well. Several delineation methods are available, all of which have simplifying assumptions which affect the size or shape of a predicted WHPA.
Five WHPA delineation methods were compared to determine which simplified the aquifer/well system while preserving essential hydrogeologic features. A simple system may not require a complex model to predict an accurate WHPA. Sensitivity of each to changes in …
Spring 1994, Nsu Oceanographic Center
Restoration Of Woodland Caribou To The Lake Superior Region, Peter J. P. Gogan, Jean Fitts Cochrane
Restoration Of Woodland Caribou To The Lake Superior Region, Peter J. P. Gogan, Jean Fitts Cochrane
United States National Park Service: Publications
Woodland caribou (Rangifer tarandus caribou) historically occupied the boreal forest zone across the North American continent. The distribution and abundance of the species has declined in the past century. In particular, it has been extirpated from much of the southern limits of its historical range on both sides of the boundary between Canada and the United States (Bergerud 1974). Translocation of animals from extant populations may be used to reestablish populations in portions of the species' former range. Recently, wildlife biologists in Ontario have translocated woodland caribou to a number of sites in or adjacent to Lake Superior. …
Marine Mammal Studies Supported By The Northeast Fisheries Science Center During 1980-89, Gordon T. Waring, Janeen M. Quintal, Tim D. Smith
Marine Mammal Studies Supported By The Northeast Fisheries Science Center During 1980-89, Gordon T. Waring, Janeen M. Quintal, Tim D. Smith
United States Department of Commerce: Staff Publications
Marine mammal research supported by the Northeast Fisheries Science Center from 1980 to 1989 is described in the context of four research areas defined retrospectively: (1) ecological roles and habitat requirements, (2) human interactions, (3) optimum sustainable population size, and (4) research planning and archiving. Within each area, contract and in· house projects are grouped into a number of research topics which are based on actual projects completed. Research activities and results, along with the total amount of money spent, are summarized for each topic. The relationship of the research supported over the decade to the recommendations of a research …
Extension And Education Materials For Sustainable Agriculture, Volume 2, James W. King, Charles A. Francis
Extension And Education Materials For Sustainable Agriculture, Volume 2, James W. King, Charles A. Francis
CARI Extension and Education Materials for Sustainable Agriculture
Extension and Education Materials for Sustainable Agriculture
Curricula in Sustainable Agriculture
Introduction to Curricula in Sustainable Agriculture
Sustainable Agriculture, Agronomy 493/593 Course Outline
Sustainable Agriculture, Agronomy 493/AG*SAT
Principles and Practices of Sustainable Agriculture
Agricultural Ecosystems
Agricultural Ecology
Agroecology
Agricultural Ecology and Sustainability
Alternative Agriculture Curriculum
Sustainable Agriculture (B.S.)
Environment and World Food Production
Issues (Advanced) in Sustainable Agriculture
Crops, Soil, and Civilization, Agronomy 440
Master of Science in Sustainable Systems
Agricultural Ecology
National Curriculum for Sustainable Agriculture
Reshaping Undergraduate and Graduate Education to Include a Whole Systems Emphasis
Sustainable Agriculture Education: A Panel
Impact of Sustainable Agriculture Programs on United.States …
Ground Water In The Kentucky River Basin, Daniel I. Carey, James C. Currens, James S. Dinger, James A. Kipp, David R. Wunsch, Philip G. Conrad
Ground Water In The Kentucky River Basin, Daniel I. Carey, James C. Currens, James S. Dinger, James A. Kipp, David R. Wunsch, Philip G. Conrad
Information Circular--KGS
Most private wells in the Kentucky River Basin are in unconfined or semi-confined bedrock aquifers. Within these aquifers, high-yield zones are irregularly distributed. The most productive wells are drilled into fractured bedrock and alluvium along the Kentucky River floodplain. The data indicate that ground water acts as a buffer to peak and low flows in Kentucky River Basin streams. At current withdrawal rates, ground-water usage does not seem to have an adverse impact on the Kentucky River. Privately owned ground-water sources supply approximately 135,000 people living in the basin-approximately 19 percent of the total population and 36 percent of the …
Involvement Of Industry In The National High Performance Computing And Communication Enterprise, Geoffrey C. Fox
Involvement Of Industry In The National High Performance Computing And Communication Enterprise, Geoffrey C. Fox
Northeast Parallel Architecture Center
We discuss aspects of a national computer science agenda for High Performance Computing and Communications (HPCC). We agree with the general direction and emphasis of the current program. In particular, the strong experimental component and linkage of applications with computer science should be continued. We recommend accelerating the emphasis on "national challenges " with more applications and technologies from the information, as compared to simulation areas. We suggest modifying the grand challenge concept to complement the current teaming of particular computer science and applications researchers. We would emphasize better linking of each application group to the entire (inter) national computer …
Applications And Enabling Technology For Nynet Upstate Corridor, Salim Hariri, Geoffrey C. Fox
Applications And Enabling Technology For Nynet Upstate Corridor, Salim Hariri, Geoffrey C. Fox
Northeast Parallel Architecture Center
Current advances in telecommunication and computing will have significant impact on the proliferation of high performance computing and communication (HPCC) applications. With these emerging technologies, it is feasible to run parallel and distributed applications across a high speed wide area network which was not possible a few years ago; the high latency and low bandwidth were the main bottlenecks for the wide area network-based computing. This has lead to the deployment of several high speed networks across the country (eg. NYNET). In this report, we describe some of the HPCC applications and our experiences and lessons learned from running them …
Modeling Oyster Populations. Iv. Rates Of Mortality, Population Crashes, And Management, E. N. Powell, J. M. Klinck, E. E. Hofmann, S. M. Ray
Modeling Oyster Populations. Iv. Rates Of Mortality, Population Crashes, And Management, E. N. Powell, J. M. Klinck, E. E. Hofmann, S. M. Ray
CCPO Publications
A time-dependent energy-flow model was used to examine how mortality affects oyster populations over the latitudinal gradient from Galveston Bay, Texas, to Chesapeake Bay, Virginia. Simulations using different mortality rates showed that mortality is required for market-site oysters to be a component of the population's size-frequency distribution; otherwise a population of stunted individuals results. As mortality extends into the juvenile sizes, the population's size frequency shifts toward the larger sizes. In many cases adults increase despite a decrease in overall population abundance. Simulations, in which the timing of mortality varied, showed that oyster populations are more susceptible to population declines …
Modeling Oyster Populations Ii. Adult Size And Reproductive Effort, E. E. Hofmann, J. M. Klinck, E. N. Powell, S. Boyles, M. Ellis
Modeling Oyster Populations Ii. Adult Size And Reproductive Effort, E. E. Hofmann, J. M. Klinck, E. N. Powell, S. Boyles, M. Ellis
CCPO Publications
A time-dependent model of energy flow in post-settlement oyster populations is used to examine the factors that influence adult size and reproductive effort in a particular habitat, Galveston Bay, Texas, and in habitats that extend from Laguna Madre, Texas to Chesapeake Bay. The simulated populations show that adult size and reproductive effort are determined by the allocation of net production to somatic or reproductive tissue development and the rate of food acquisition, both of which are temperature dependent. For similar food conditions, increased temperature reduces the allocation of net production to somatic tissue and increases the rate of food acquisition. …
A Study Of The Two Major Causes Of Neonatal Deaths: Perinatal Conditions And Congenital Anomalies, Felipe Lorenzo-Luaces
A Study Of The Two Major Causes Of Neonatal Deaths: Perinatal Conditions And Congenital Anomalies, Felipe Lorenzo-Luaces
UNF Graduate Theses and Dissertations
Infant mortality is a public health concern in the United states. We concentrate on neonatal mortality for its high accountability of infant mortality. In this paper we study the neonatal mortality of Florida's 1989 live birth cohort.
The data has been analyzed for two major causes of deaths: perinatal conditions and congenital anomalies. We use the KAPLAN-MEIER method to estimate the survival probabilities. For each cause, data were fit to the Weibull models and Extreme Value models to estimate the parameters of the survival curves. The results indicate that primary factors for each cause of neonatal deaths are very low …
The Chemistry Of Allergies, Henry Daley
Oxidation Of Cyclohexene With Aqueous Potassium Peroxymonosulfate At Ph < 1.7, Wen-Qing Sun
Oxidation Of Cyclohexene With Aqueous Potassium Peroxymonosulfate At Ph < 1.7, Wen-Qing Sun
Theses
Glycols are often used as starting materials for pharmaceuticals. They are currently manufactured by reacting alkenes with organic peroxy acids in organic solutions that contain chlorinated solvents. The aim of this research is to find ways to avoid the use of hazardous organic solvents in the manufacture of pharmaceuticals in order to prevent pollution. Our approach is to find alternative synthetic methods using water as solvent.
Based on literature information, it was decided to determine if the aqueous potassium peroxymonosulfate oxidation of water-immiscible cyclohexene at room temperature can be scaled up to become a new method to manufacture glycols. Acidic …
Catalytic Oxidation Of Chlorinated Hydrocarbons Over Powdered Transition Metal Oxide, Sanmei Xu
Catalytic Oxidation Of Chlorinated Hydrocarbons Over Powdered Transition Metal Oxide, Sanmei Xu
Theses
This study addresses the ability of powdered transition metal oxides such as manganese oxide, iron oxide and copper oxide to catalytically oxidize low concentrations of chlorinated hydrocarbons with air. The catalytic oxidation of trichloroethylene and dichloromethane in a tubular reactor system was evaluated experimentally as a function of temperature and space velocity. Gas chromatography with electron capture detector and flame ionization detector was used for quantitative analysis of feed and product streams. Gas chromatography/mass spectrometry and gas chromatography/Fourier transform infrared spectroscopy were used to identify all oxidation products. The results indicate that over 99% conversion of trichloroethylene is achieved at …
Comparing Normal And Sickle Hemoglobin Oxidation And Heme Transfer In The Presence Of Phosphatidylserine Vesicles, Qinghai Pan
Comparing Normal And Sickle Hemoglobin Oxidation And Heme Transfer In The Presence Of Phosphatidylserine Vesicles, Qinghai Pan
Master's Theses
No abstract provided.
A Prospective Community-Based Study Of Stroke In Warsaw, Poland, Anna Czlonkowska, Danuta Ryglewicz, Thomas Weissbein, Maria Baranska-Gieruszczak, Daniel B. Hier
A Prospective Community-Based Study Of Stroke In Warsaw, Poland, Anna Czlonkowska, Danuta Ryglewicz, Thomas Weissbein, Maria Baranska-Gieruszczak, Daniel B. Hier
Chemistry Faculty Research & Creative Works
Background and Purpose Poland is a Country with High Morbidity and Mortality Rates from Cardiovascular Diseases. No Recent Studies Have Evaluated the Contribution of Cerebrovascular Diseases to This Morbidity and Mortality. Our Aim Was to Accurately Determine Stroke Incidence Rates in Warsaw, Poland. Methods a 2-Year Prospective and Population-Based Stroke Registry Was Maintained for Health Care Units 2 and 3 in Warsaw, Poland (Population, 182 285). Case Subjects Were Ascertained by Surveying Hospital Admissions, Outpatient Visits, and Death Certificates. Results during the 2 Years of the Study (1991 to 1992), 633 Cases of First-Event Strokes Were Registered, 462 of Which …
Chiral Isoparathion Methyl As A Stereospecific Probe Of Phosphorothiolate Mechanism Of Action; Novel Synthetic Approaches Toward Isoquinolone Alkaloids: Pancratistatin Study, Seungmin Ryu
Dissertations
No abstract provided.
Further Evidence Of Lead Contamination Of Omaha Skeletons, A. Mohamad Ghazi, Karl J. Reinhard, Mary Anne Holmes, Eric M. Durrance
Further Evidence Of Lead Contamination Of Omaha Skeletons, A. Mohamad Ghazi, Karl J. Reinhard, Mary Anne Holmes, Eric M. Durrance
Department of Earth and Atmospheric Sciences: Faculty Publications
A previous analysis of Omaha skeletons dating between A.D. 1780 and 1820 revealed the presence of lead in all skeletons with high concentrations in children and adult males (Reinhard and Ghazi [1992] Am. J. Phys. Anthropol. 89: 183-195). Two likely explanations for the high lead levels were presented: 1) metabolic absorption of lead and 2) diagenetic uptake of lead by the bones from postmortem application of pigments to the corpse. Two types of lead were available to the Omaha tribe: 1) Mississippi Valley type, and 2) non-Mississippi Valley type. It has been suggested that red-lead pigment mixed with mercury sulfide …
Survey Of Cellular Radiosensitivity Parameters, Robert Katz, Rashidah Zachariah, Francis A. Cucinotta, Chunxiang Zhang
Survey Of Cellular Radiosensitivity Parameters, Robert Katz, Rashidah Zachariah, Francis A. Cucinotta, Chunxiang Zhang
Robert Katz Publications
A model of the formation of particle tracks in emulsion has been extended through the use of biological target theory to formulate a theory of the response of biological cells and molecules of biological importance to irradiation with energetic heavy ions. For this purpose the response to γ rays is represented by the single-hit, multi-target model with parameters m and D0, while additional parameters κ (or a0) and σ0 are required to represent the size of internal cellular targets and the effective cross-sectional area of the cell nucleus, respectively, for heavy-ion bombardments. For one-or-more-hit detectors, …
Tolerance Of Bitter Compounds By An Herbivore, Cavia Porcellus, Dale L. Nolte, J. Russell Mason, Stanley Lewis
Tolerance Of Bitter Compounds By An Herbivore, Cavia Porcellus, Dale L. Nolte, J. Russell Mason, Stanley Lewis
United States Department of Agriculture Wildlife Services: Staff Publications
Many plant defensive chemicals are bitter to humans. Because of this taste characteristic, and because bitter compounds are often toxic, such substances, and the plants that contain them, are regarded as generally unpalatable to wildlife. These assumptions may be unwarranted. To test the hypothesis that herbivores are indifferent to 'bitter' tastants, we investigated the responsiveness of guinea pigs (Cavia porcellus) to denatonium benzoate, denatonium saccharide, limonene, L-phenylalanine, naringin, quebracho, quinine, Ro-Pel (a commercial animal repellent containing denatonium saccharide) and sucrose octaacetate. Only quinine and sucrose octaacetate slightly but significantly reduced feeding (P < 0.05). Our findings are inconsistent with the notion that herbivores generally avoid what humans describe as bitter tastes.
Identification Of Tire Leachate Toxicants And A Risk Assessment Of Water Quality Effects Using Tire Reefs In Canals, S. M. Nelson, G. Mueller, D. C. Hemphill, U.S. Bureau Of Reclamation
Identification Of Tire Leachate Toxicants And A Risk Assessment Of Water Quality Effects Using Tire Reefs In Canals, S. M. Nelson, G. Mueller, D. C. Hemphill, U.S. Bureau Of Reclamation
Publications (WR)
Cover is an important component of aquatic habitat and fisheries management. Fisheries biologists often try to improve habitats through the addition of natural and artificial material to improve cover diversity and complexity. Habitat-improvement programs range from submerging used Christmas trees to more complex programs using sophisticated artificial habitat modules. Used automobile tires have been employed in the large scale construction of reefs and fish attractors in marine environments and to a lesser extent in freshwater and have been recognized as a durable, inexpensive and long-lasting material which benefits fishery communities.
Recent studies by the U.S. Bureau of Reclamation have quantified …