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Articles 45631 - 45660 of 52503
Full-Text Articles in Entire DC Network
Water Current, Volume 23, June 1991
Water Current, Volume 23, June 1991
Water Current Newsletter
NGF Awards Received by Spaldings at Banquet
Water-Related Action in the 1991 Session of the Nebraska Legislature
From the Director: There's Good News and Bad News
Water Topics Included in New Acquisitions
Bob Volk Receives Award
All Wells in Basin Should be Regulated
News to Use
Center Pivot Industry in Nebraska Recognized with Awards
Water Quality Research Site in Nebraska Differs
More Emphasis on Water Quality Research, Federal Official
Colorado, Wyoming, Nebraska Irrigation Tour Destinations
Projects Funded Here with USGS Grants
York Recharge Project Dedicated by Dignataries and Guests
Nearly 4,500 Chemigation Applicators Certified in Two Years
Nitrate-Groundwater Contamination a …
Selecting And Developing Reliable Bore Sites In The Eastern Wheatbelt, Richard George
Selecting And Developing Reliable Bore Sites In The Eastern Wheatbelt, Richard George
Bulletins 4000 -
In the Western Australian wheatbelt, groundwater supplies contribute about 40 per cent of the on-farm livestock requirements and occasionally domestic water supply systems. The first part of this Bulletin comments on sites suitable for both high yielding bores and also those which yield water suitable for livestock. The second part outlines techniques for constructing and developing a bore. Throughout this Bulletin livestock quality water, for adult sheep, is defined as groundwater of less than 12,000 mg/L (or 850 grains per gallon) which has not been subject to localized pollution. For other livestock, the maximum salinities range from 2,600 mg/L for …
Water Resources Review - June 1991 Vol 4 No 2, Annis Water Resources Institute
Water Resources Review - June 1991 Vol 4 No 2, Annis Water Resources Institute
AWRI Reviews
No abstract provided.
Biological Coal Desulfurization, Ming Le
Biological Coal Desulfurization, Ming Le
Theses
Sulfur removal from coal before combustion is of considerable interest to avoid emission of oxides of sulfur(SOx). Chemical and physical methods have been developed for removing the inorganic sulfur component in coal. This component is generally associated with pyrites(FeS2). However, no commerical methods have been developed for the removal of the organic sulfur conponent. This study describes microbial methods for removing organically bound sulfur from coal. The specific goals of this study were to ascertain whether a robust biologically active population such as activated sludge biomass can remove organic sulfur from coal and to devise sulfur analytical methods …
Isolation And Characterization Of A Crude Extracellular Phenol Oxidase From A Recirculation Bioreactor, Yun Tang
Theses
The study of phenol biodegradation has been performed using calcium alginate entrapped activated sludge in a recirculation reactor. An effective recirculation reactor system may be used on the laboratory scale to produce phenol oxidase, Phenol oxidase was isolated and concentrated from the degradation solution of phenol by ultrafiltration and freeze-drying respectively,
The effects of various concentrations of phenol, pH, temperature, ionic strength, cations, anions and 2- chlorophenol were studied on the oxidation reaction of enzyme. The optimal conditions of activated sludge phenol oxidase are [phenol] = 100 ppm; pH = 6.0; temperature 37°C; ionic strength equivalent to 0.1 M Na …
Experiments In Aerobic And Anaerobic Biodegradation Of Methylene Chloride Using Activated Sludge, Vivek Chandrakant Sinkar
Experiments In Aerobic And Anaerobic Biodegradation Of Methylene Chloride Using Activated Sludge, Vivek Chandrakant Sinkar
Theses
Biological removal of methylene chloride was studied under aerobic and anaerobic conditions using activated sludge cultures. Shaker flask experiments were conducted to test the ability of the microorganisms to degrade methylene chloride under aerobic conditions. Hydrogen peroxide was used a as source of dissolved oxygen to minimize physical removal of methylene chloride due to aeration. The effect of secondary substrates like glucose, cellulose acetate, ammonium acetate and nutrient broth on biodegradation of methylene chloride was studied. Biodegradation in the presence of surfactant and alkaline stress was also investigated.
No significant degradation was observed in all aerobic experiments.
Anaerobic sludge was …
Acid Recovery Of Cadmium And Lead From Immobilized Activated Sludge Used To Biosorb Metals, Chandrakanth Hartman
Acid Recovery Of Cadmium And Lead From Immobilized Activated Sludge Used To Biosorb Metals, Chandrakanth Hartman
Theses
A study of the adsorption and subsequent desorption of heavy metals using various concentrations of hydrochloric acids has been performed.
To accomplish this task, the following areas were investigated : immobilization of the sludge, adsorption of heavy metals, various concentrations of acid used as stripping agents, examination of the relative fractions of heavy metals obtained using various stripping agents, and the actual concentration of the acid at a particular fraction.
It was observed that water helps in extraction of cadmium to a certain extent, but lead cannot be extracted with water. Also, water mixed with dilute hydrochloric acid is more …
Biodegradation Of Styrene In A Recirculation Reactor Using Immobilized Activated Sludge, Shreyans Dilip Shah
Biodegradation Of Styrene In A Recirculation Reactor Using Immobilized Activated Sludge, Shreyans Dilip Shah
Theses
The performance of immobilized cells in the biological treatment of hazardous waste was investigated using a recirculating flow reactor in batch mode. A mixed culture activated sludge from a municipal waste water treatment plant was immobilized in calcium alginate gel, The bio-oxidation ability of these microbes towards a model toxin (styrene) was studied under closed system using dilute H2O2 solution as an oxygen source.
The process parameters studied were as follows:
- Effect of flow rate of recycle stream,
- Effect of biomass loading,
- Effect of spiking concentration of styrene, and
- Flow pattern and average residence time within the …
Liquid-Vapor Equilibria And Henry's Law Constants For Volatile Organics In Surfactants, Qianping Peng
Liquid-Vapor Equilibria And Henry's Law Constants For Volatile Organics In Surfactants, Qianping Peng
Theses
We present liquid vapor equilibria data and Henry's law constants for Methyl-ethyl Ketone, Toluene, Butyl Acetate, Acetone and i-Propanol in surfactants: Octylphenyl Decaethoxylate, Sorbitan Monooleate and Sodium Sulfonate at temperatures of 20 to 70 C.
The objective of this study is to determine the effect of applying surfactant absorption technique (neat surfactants) to volatile organic compounds (VOC's) for the removal of these species as organic vapors from air emission streams.
Liquid/vapor equilibrium data are presented as curves in several different ways:
i. Each individual VOC at four temperatures between 22 C to 70 C in the respective surfactants Octylpenyl Decaethoxylate, …
Catalytic Oxidation Of Trace Concentrations Of Chlorinated Hydrocarbons Over 1.5% Platinum On Alumina/Monolith, Yi Wang
Theses
The catalytic oxidation of chlorinated hydrocarbons CH2Cl2 (DCM) and C2HCl3 (TCE) was investigated over a 1.5% Pt on Al2O3/monolith at 150 to 450°C. The studies were conducted at space velocities from 1,000 v/v/hr to 30,000 v/v/hr. Chemical equilibrium calculations showed the potential conversion and products distribution. The reactivity and selectivity for destruction of these compounds with air over Pt catalyst were evaluated experimentally. This research was conducted in a tubular reactor system with associated feed and product flow measuring equipment. Feed and product streams were analyzed using gas chromatography (GC) with ECD, FID and …
Appendix To The Final Report Of The Rfac. Statistical Summary Of Public Responses To Key Issues., Recreational Fishing Advisory Committee Western Australia.
Appendix To The Final Report Of The Rfac. Statistical Summary Of Public Responses To Key Issues., Recreational Fishing Advisory Committee Western Australia.
Fisheries Management Papers
This paper has been published as a separate appendix to the final report of the Recreational Fishing Advisory Committee, and should be read in conjunction with it, and the Committee's discussion paper ("Final report of the Recreational Fishing Advisory Committee - Fisheries Management Paper No. 41 1991). The key issues that were identified in the discussion paper came up under the following headings: 5.1 Environment 5.2 Resource Sharing 5.3 Access for Fishing 5.4 Research 5.5 Management rules 5.6 Enforcement 5.7 Charter fishing 5.8 Funding and licensing 5.9 Community consultation 5.10 Public awareness and community education.
The Probe, Issue 110 - May 1991
The Probe, Issue 110 - May 1991
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
MAY 1991
NADCA News From Great Plains Wildlife Damage Control Workshop
Student Awards Presented
By-laws Amended, Approved
Bill Fitzwater Recognized at NADCA Meeting
Membership Contest to Begin
Logo Contest to Begin
ADC Practices Are Generally Consistent With Legislation and Guidance
Animal Damage Control in the News
Mountain Lions Kill 10 Sheep in Nevada
Snow Geese Devastate Oklahoma Spinach Crop
Coyotes Troubling To Idaho Homeowners
Predator Platforms Deter Honey-Seeking Bears
Nutria Cause Major Damage in Sugar Cane
Mountain Lion Appears in Irvine, California Backyard
WLFA Wants to Protect “Your Right to Hunt, Trap, and …
Wildlife Damage News, Volume 2, Spring 1991
Wildlife Damage News, Volume 2, Spring 1991
Wildlife Damage News
CONTENTS: Controlled Hunting Programs for Reducing Deer Damage Deer Management at the Institute of Ecosystem Studies Mary Flagler Cary Arboretum Position Statement of The Wildlife Society: Responsible Human Use of Wildlife Publications Current literature Snake Control in Home landscapes Humane Capture of Wild Animals Concerns About Lyme Disease Vaccine for Canines
Muskrat (Ondatra Zibethicus)
Nebraska Game and Parks Commission: Publications
Muskrat:
Description
Distribution and Abundance
Habitat and Home
Habits
Foods
Reproduction
Mortality
Importance
Management
Effects Of The Conservation Reserve Program On Selected Wildlife Populations In Southeast Nebraska, Justin W. King
Effects Of The Conservation Reserve Program On Selected Wildlife Populations In Southeast Nebraska, Justin W. King
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Determining If Self-Guided Demonstration Tours Are An Effective Method To Inform Farmers And Ranchers About Conservation Practices, Larry L. Andelt
Determining If Self-Guided Demonstration Tours Are An Effective Method To Inform Farmers And Ranchers About Conservation Practices, Larry L. Andelt
Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research
The primary purpose of this study was to determine if the "Conservation Neighbor to Neighbor" program was an effective method of delivery to inform farmers and ranchers about conservation practices in Nebraska. A survey instrument was developed with the help of a committee of experts. The instrument asked respondents to rate the degree of agreement, quality and interest in the Conservation Neighbor to Neighbor program and the effectiveness of the delivery method. The population for the study included all the program hosts and a random sampling of all farmers and ranchers in Nebraska. The following conclusions were drawn from the …
The Ecology Of Franklin's Ground Squirrel In Indiana, Peter M. Benjamin
The Ecology Of Franklin's Ground Squirrel In Indiana, Peter M. Benjamin
All-Inclusive List of Electronic Theses and Dissertations
A reduction in the distribution of the Franklin's ground squirrel in the eastern portion of its range has led to its classification as a threatened species in Indiana. Information is lacking on this species' habitat requirements and population characteristics in Indiana, which limits management capabilities. The purpose of this study was to identify preferred habitat and population characteristics of the Franklin's ground squirrel in Indiana. Radio telemetry was conducted from April 1987 to September 1988 at 3 sites along a railroad right-of-way (ROW} in Benton County, Indiana. Land use and habitat types were mapped; species composition, density, percent cover, percent …
Is Rainbow Trout Condition Influenced By Invertebrate-Drift Density?, Randall B. Filbert
Is Rainbow Trout Condition Influenced By Invertebrate-Drift Density?, Randall B. Filbert
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Users of the Instream Flow Incremental Methodology CTFIM) commonly assume that there is a positive linear relationship between available habitat (WUA) and stream fish biomass. However, several studies have shown a lack cf correlation between WUA and biomass. Such poor relationships may occur if other factors limit fish abundance. Food availability is a potentially important factor limiting abundance of stream fishes and can affect blomass by influencing fish condition (individual weight). I collected rainbow trout (Oncorhynchus mykiss) exposed to different levels of invertebrate-drift density to determine if condition was greater where food was more abundant. I also examined …
Microwave Treatment Of Hazardous Wastes : Chemical Fixation Of Insoluble Non-Volatile, Chemically Non-Reactive Organics In Soil, Naihong Zhu
Theses
Microwave treatment of hazardous wastes like dioxin-contaminated soil potentially fills a great need for a remediation technology which potentially can be applied in-situ: the EPA has concluded from a risk assessment study that it is the excavation and transportation of such wastes that poses the greatest risk. Studies have been carried out on a surrogate for dioxin, namely, 9,10-anthraquinone because it has similar chemical and physical properties but it is not toxic. It was found in microwave treatment studies that, at temperatures attainable in-situ, anthraquinone became non-extractable. A model was proposed which postulated that as water was removed from soil …
The Angler As Environmentalist: Oregon Trout And The Fight To Save The Wild Salmon Of The Columbia River, John P. Rosenberg
The Angler As Environmentalist: Oregon Trout And The Fight To Save The Wild Salmon Of The Columbia River, John P. Rosenberg
Dissertations and Theses
This paper traces the history of Oregon Trout, an environmental organization in Portland, Oregon, from its beginning in the fall of 1983 through the spring of 1990, when it filed petitions on behalf of four stocks of Columbia and Snake River salmon under the Endangered Species Act. It focuses on Oregon Trout's efforts to preserve the wild salmon of the Columbia River as a contemporary example of anglers acting as environmentalists to conserve threatened or endangered species. According to historian John Reiger in American Sportsmen and the Origins of Conservation, hunters and anglers have been acting in this role …
Scanning Electron Microscopic Study Of Quartz Sand Surface Features, Ash Hollow Formation, Ogallala Group, Western Nebraska, Patricia E. Helland, Robert F. Diffendal Jr.
Scanning Electron Microscopic Study Of Quartz Sand Surface Features, Ash Hollow Formation, Ogallala Group, Western Nebraska, Patricia E. Helland, Robert F. Diffendal Jr.
School of Natural Resources: Faculty Publications
In field studies of the late Tertiary Ash Hollow Formation of the Ogallala Group in western Nebraska the alluvial deposits are composed of large volumes of sand and gravel up to large cobbles. Because the current understanding of the climate of the region at the time of deposition does not provide for a source for deposits of this character, a scanning electron microscopic study of the surface features on the quartz sand grains from these sediments was undertaken. Nine samples, collected from locations in Banner, Morrill and Keith Counties, were examined to see if they had one or more of …
Volume 2 - April 18, 1991
What on Earth
What on Earth was a short-run student publication by the Providence College Environmental and Wildlife Club. (Volume 2 - April 18, 1991 - 8 pages total.)
A Whale Of A New Species, Katherine Ralls, Robert L. Brownell Jr.
A Whale Of A New Species, Katherine Ralls, Robert L. Brownell Jr.
United States Department of Commerce: Staff Publications
Although four new species of whale have been identified since 1937, the absence of new ones for the past 28 years might be taken to mean that they had finally all been dis- covered. Not so - a new species of beaked whale, Mesoplodonperuvianus, is described by J. C. Reyes and colleagues in the latest issue of Marine Mammal Science.
Wildlife Damage Management In The 90s—Does The Professional Fit The Profession?, Jay B. Mcaninch
Wildlife Damage Management In The 90s—Does The Professional Fit The Profession?, Jay B. Mcaninch
Great Plains Wildlife Damage Control Workshop Proceedings
A recurring theme at animal damage conferences has been the lack of interest in, and recognition of, animal damage management or problem wildlife manage-ment as an important topic in the wildlife profession (Timm 1982; Berryman 1983, 1989; Jones 1983; Miller 1987; San Julian 1989; Schmidt 1989a). This concern has been raised by Animal Damage Control (ADC) workers in urban, suburban, agri-cultural and forested systems and, in fact, can be heard in nearly any landscape in which wildlife are in conflict with people's use of the land. While the scope of these issues involves the largest potential constitu-ency the wildlife profession …
Utah State University's Academic Program In Wildlife Damage Management, Michael R. Conover, Raymond D. Dueser, Frederick F. Knowlton, Joseph A. Chapman
Utah State University's Academic Program In Wildlife Damage Management, Michael R. Conover, Raymond D. Dueser, Frederick F. Knowlton, Joseph A. Chapman
Great Plains Wildlife Damage Control Workshop Proceedings
Every wildlife species has positive values or benefits it provides to society. Some people enjoy hunting, while others enjoy watching and hearing wildlife; still other people derive pleasure simply knowing animals exist free from human dependency (King 1947, Ehrenfeld 1976, Steinhoff 1978). Each species also has negative values (Decker and Purdy 1988) associated with adverse impacts, such as property damage, damage to agricultural crops, predation on other valuable species, or simply being a nuisance. For any location and point in time, the net value of any wildlife resource is the sum of all its positive and negative values. The goal …
What's In A Name?, Robert S. Cook
What's In A Name?, Robert S. Cook
Great Plains Wildlife Damage Control Workshop Proceedings
Communication is a vital part of this complex world in which we live. Even with the vast vocabulary that has evolved throughout recorded history, we still often find difficulty in expressing ourselves. As receivers of information, we struggle to grasp what the other person is trying to say. Also, when we speak to others, we struggle for the right words to use so that we can convey to that person exactly what we mean. The words we use and how we use them are very important to us as we communicate with each other. We have all experienced a time …
Social, Political, Legal, And Ethical Aspects Of Wildlife Damage Management, Robert H. Schmidt, Terrell P. Salmon
Social, Political, Legal, And Ethical Aspects Of Wildlife Damage Management, Robert H. Schmidt, Terrell P. Salmon
Great Plains Wildlife Damage Control Workshop Proceedings
Wildlife damage management practices are more influenced by our social environ-ment today than in any other period during history. Change is clearly in the wind, and the scope and range of that change will be defined by the social, legal, political, and ethical constraints determined by all seg-ments of society. By defining the decision-making environment, however, management decisions can be made with a clearer under-standing of potential ramifications and, hopefully, a refinement of uncertain princi-ples that influence management decisions affecting natural resource use (Holling 1978).
Educating People About Wildlife Damage, Jeffrey S. Green
Educating People About Wildlife Damage, Jeffrey S. Green
Great Plains Wildlife Damage Control Workshop Proceedings
Managing the damage that species of wildlife cause to human-owned resources is a legitimate area of specialization in the field of wildlife management. In recent years, wildlife damage management, particularly the Federal government's Animal Damage Control (ADC) program, has come under increased scrutiny and opposition. Reasons for the increased focus on ADC are varied but no doubt center on the fact that some of ADC's activities involve killing animals. Groups opposed to ADC have used the media to gain a following, but the glimpses of ADC they have shown to the public are rarely balanced or objective. Stories usually focus …
Effects Of A Visual Barrier Fence On The Behavior And Movements Of Black-Tailed Prairie Dogs, Nancy S. Foster-Mcdonald, Scott E. Hygnstrom
Effects Of A Visual Barrier Fence On The Behavior And Movements Of Black-Tailed Prairie Dogs, Nancy S. Foster-Mcdonald, Scott E. Hygnstrom
Great Plains Wildlife Damage Control Workshop Proceedings
Prairie dogs prefer an open view of their surroundings and may abandon an area with visual obstructions. We examined the effects of a visual barrier fence, which had a see-through visibility of 60%, on the foraging, vigilance, and aggressive behaviors of adult female black-tailed prairie dogs (Cynomys ludovicianus) in central Nebraska. We expected animals near a visual barrier to spend more time in vigilance and less time foraging. Adult female prairie dogs exposed to a visual barrier spent a greater amount of time foraging and less time in a headbob position than those not exposed to a fence (P = …
Burrowing Owl Ecology And Suggestions For Minimizing Impacts Of Prairie Dog Control, Martha J. Desmond, Julie A. Savidge
Burrowing Owl Ecology And Suggestions For Minimizing Impacts Of Prairie Dog Control, Martha J. Desmond, Julie A. Savidge
Great Plains Wildlife Damage Control Workshop Proceedings
Burrowing owls (Athene cunicularia) are declining throughout much of their range. They were placed on the Audubon Society's Blue List in 1971 and were listed as a Species of Special Concern in 1986. Little information exists on burrowing owl population sizes and causes of population declines appear to be mostly speculation. Although considerable research has been done on burrowing owls in the Western United States, relatively little is known of the burrowing owl population in the Great Plains. In the Great Plains, burrowing owls will nest in abandoned badger (Taxidea taxus) burrows but are most commonly associated with black-tailed prairie …