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Articles 18871 - 18900 of 19881
Full-Text Articles in Entire DC Network
Antarctic Peninsula Mysticete Whales: Conservation And Research, Gregory Schofield Stone
Antarctic Peninsula Mysticete Whales: Conservation And Research, Gregory Schofield Stone
Marine Affairs Theses and Major Papers
This paper reports original research from two recent studies in the Antarctic Peninsula area, reviews past sighting information and policies affecting mysticete whales, and recommends future research. Due to poor management by the International Whaling Commission, mysticete whales are among the most severely depleted species groups in the Antarctic. The combined total Antarctic harvest from 1920 to 19867 for blue Balaenoptera musculus, fin B. physalus, sei B. borealis, minke B. acutorostrata and humpback Megaptera novaeangliae whales was over one million animals. The effect of this hunting pressure is the dominant factor determing the present status of Antarctic …
Bent Pegs And Round Holes: New Concerns For Oil And Gas Commissions, Kemp Wilson, University Of Colorado Boulder. Natural Resources Law Center
Bent Pegs And Round Holes: New Concerns For Oil And Gas Commissions, Kemp Wilson, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
12 p. ; ill ; 28 cm
Transferring Water Rights In The Western States: A Comparison Of Policies And Procedures, Bonnie G. Colby, Mark A. Mcginnis, Ken A. Rait, Richard W. Wahl, University Of Colorado Boulder. Natural Resources Law Center
Transferring Water Rights In The Western States: A Comparison Of Policies And Procedures, Bonnie G. Colby, Mark A. Mcginnis, Ken A. Rait, Richard W. Wahl, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
vi, 90 p. : ill. ; 28 cm
The Uranium-Trend Dating Method: Principles And Application For Southern California Marine Terrace Deposits, Daniel R. Muhs, John N. Rosholt, Charles L. Bush
The Uranium-Trend Dating Method: Principles And Application For Southern California Marine Terrace Deposits, Daniel R. Muhs, John N. Rosholt, Charles L. Bush
United States Geological Survey: Staff Publications
Uranium-trend dating is an open-system method for age estimation of Quaternary sediments, using disequilibrium in the 238U–234U–230Th decay series. The technique has been applied to alluvium, colluvium, loess, till, and marine sediments, in this study we tested the U-trend dating method on calcareous marine terrace deposits from the Palos Verdes Hills and San Nicolas Island, California. Independent age estimates indicate that terraces in these areas range from –80 ka to greater than 1.0 Ma. Two low terraces on San Nicolas Island yielded U-trend plots that have a clustered array of points and the ages of …
The Effect On Earth's Surface-Temperature From Variations In Rotations Rate, Continent Formation, Solar Luminosity, And Carbon Dioxide, William R. Kuhn, J. C.G. Walker, Harold G. Marshall
The Effect On Earth's Surface-Temperature From Variations In Rotations Rate, Continent Formation, Solar Luminosity, And Carbon Dioxide, William R. Kuhn, J. C.G. Walker, Harold G. Marshall
Biological Sciences Faculty Publications
Proposed evolutionary histories of solar luminosity, atmospheric carbon dioxide amounts, Earth rotation rate, and continent formation have been used to generate a time evolution of Earth's surface temperature. While speculative because of uncertainties in the input parameters, such a study does help to prioritize the areas of most concern to paleoclimatic research while illustrating the relationships and mutual dependencies. The mean temperature averages about 5 K higher than today over most of geologic time; the overall variation is less than 15 K. The evolution of Earth's rotation rate makes a significant contribution to the surface temperature distribution as late as …
Degradation Of 1,2 - Dichlorobenzene And 1,2,4 - Trichlorobenzene In Water Using Ozone, Hydrogen Peroxide And Ultraviolet Radiation, Wei Jie Chen
Theses
The experiments to oxidize the refractory chemicals, 1,2 - dichlorobenzene and 1,2,4 - trichlorobenzene using ozone, hydrogen peroxide and ultraviolet radiation have been conducted in a photoreactor. The kinetic models for the oxidation processes have been proposed and the data obtained in the experiments was used to calculate the mass transfer coefficient and chemical reaction rate constants. The Rosenbrock Hillclimb optimization algorithm has been used to optimized the coefficient and rate constants to give the best fit to the experimental data. It is concluded that the H2O2/UV is the best process for the degradation of 1,2 …
Survival Of Trout Strains As Affected By Limnological Parameters, Wayne A. Wurtsbaugh
Survival Of Trout Strains As Affected By Limnological Parameters, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
Prior work at East Canyon Reservoir, Utah indicated that adult trout are important predators of stocked juvenile rainbow trout. Brown trout, in particular, were exclusively piscivorous when th~y exceeded 185 mm standard length. Fish became increasingly important in the diet of cutthroat trout greater than 330 mm. The purpose of this study was to further document the effect of adult trout on survival of juvenile rainbow trout in mid-elevation reservoirs. Causey Reservoir was chosen because it was thought to contain large brown and cutthroat trout and had not been intensively studied during the last eight years.
The Probe, Issue 87 - November 1988
The Probe, Issue 87 - November 1988
The Probe: Newsletter of the National Animal Damage Control Association
CONTENTS: NADCA Meeting Priorities Retired Personnel: Rusty Birchfield Reading Material In Memorial: Frank Sessions Letters to the Editor Rodent Roast Botulinus Help in removing red fox New Products Editorial Column NADCA Membership Application
The Probe, Issue 86 - October 1988
The Probe, Issue 86 - October 1988
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
OCTOBER 1988
Wildlife Legislative Fund of America
APHIS Activity Report
Giardia Lamblia
Personnel
Letters to Ye Ed
Preserving Habitat
Water Current, Volume 20, October 1988
Water Current, Volume 20, October 1988
Water Current Newsletter
Bonneville Power Administrator Compares Missouri Basin Reservoirs with Pacific Northwest's
Nebraska Ranks Third in Water Use in U.S.
Spalding Appointed Associate Director of UNL Water Center
Nebraska Water Conference Council Holds Fall Meeting
Water Research Proposals are Due December 1
Answers to Water Quality Questions Closer with Burlington Northern Foundation $ Million Grant
Former Nebraskans Address Northwest Water Tour Group
Drought Responses Discussed at Forum
Nonparametric Comparison Of Exponential Growth Curves, Russel S. Rickard, Richard M. Engeman, Gary O. Zerbe
Nonparametric Comparison Of Exponential Growth Curves, Russel S. Rickard, Richard M. Engeman, Gary O. Zerbe
United States Department of Agriculture Wildlife Services: Staff Publications
A program to compare exponential growth curves via randomization tests has been developed for the one-way analysis-of variance situation. Exponential growth curves of the form Y = a - b exp( - gt) are first fit to each individual's longitudinal data. The parameters from each individual's curve are then input into the randomization program.
The Probe, Issue 85 - August/September 1988
The Probe, Issue 85 - August/September 1988
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
AUGUST/SEPTEMBER 1988
Trapping’s Future?
The Toxic Collar
APHIS Activity Report
Pet Food Institute Report
Cholecalciferol
The Repellent, Ro-pel.
Strychnine
House/Tree Sparrows
Letters to Ye Ed
Fisheries Management In The Regional And International Contexts: Columbia River Basin, Howard G. Arnett
Fisheries Management In The Regional And International Contexts: Columbia River Basin, Howard G. Arnett
Natural Resource Development in Indian Country (Summer Conference, June 8-10)
7 pages.
Contains references.
Agenda: Natural Resource Development In Indian Country, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Natural Resource Development In Indian Country, University Of Colorado Boulder. Natural Resources Law Center
Natural Resource Development in Indian Country (Summer Conference, June 8-10)
Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Charles F. Wilkinson, Lawrence J. MacDonnell and Richard B. Collins.
Indian reservations constitute about 2.5% of all land in the country and 5% of all land in the American West. During the last two decades, Indian natural resources issues have moved to the forefront as tribal governments have dramatically expanded their regulatory programs, judicial systems. and resource development activities. This major symposium will address current developments and assess likely future directions in the areas of tribal, federal, and state regulation; tribal-state intergovernmental agreements; financing; mineral …
Timber Harvesting On Private Lands: The Washington Timber– Fish–Wildlife Agreement, John P. Mcmahon
Timber Harvesting On Private Lands: The Washington Timber– Fish–Wildlife Agreement, John P. Mcmahon
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
24 pages.
Contains 3 pages of references.
Soil Erosion, Agrichemicals And Water Quality: A Need For A New Conservation Ethic?, Christine Olsenius
Soil Erosion, Agrichemicals And Water Quality: A Need For A New Conservation Ethic?, Christine Olsenius
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
24 pages.
Contains references.
Section 404: The Nasty Business Of The Clean Water Act, Oliver A. Houck
Section 404: The Nasty Business Of The Clean Water Act, Oliver A. Houck
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
9 pages.
Contains references.
Agenda: Water Quality Control: Integrating Beneficial Use And Environmental Protection, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Water Quality Control: Integrating Beneficial Use And Environmental Protection, University Of Colorado Boulder. Natural Resources Law Center
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Lawrence J. MacDonnell and Charles F. Wilkinson.
Protecting water quality is essential to preserve the many beneficial uses of western water resources. This conference addresses the dominant federal requirements in the Clean Water Act, including the important major revisions enacted by Congress in 1987, with special attention to western problems regarding nonpoint source pollution. Developments in groundwater quality regulation are considered, as are selected issues concerning the implications of state and federal water quality regulation for the traditional exercise of water rights.
The Effluent Charge Approach To Water Quality Control, Ralph W. Johnson
The Effluent Charge Approach To Water Quality Control, Ralph W. Johnson
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
10 pages.
Contains references.
A Practitioner’S Perspective On Section 404 Permitting—Or—How To Survive The Daze From The Hazy Maze, Marcia M. Hughes
A Practitioner’S Perspective On Section 404 Permitting—Or—How To Survive The Daze From The Hazy Maze, Marcia M. Hughes
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
17 pages.
Contains footnotes and references.
An Ongoing Survey Of Halodule Wrightii, Ruppia Maritima And The Alga, Caulerpa Prolifera, In Hillsborough Bay, Florida, City Of Tampa Department Of Sanitary Sewers
An Ongoing Survey Of Halodule Wrightii, Ruppia Maritima And The Alga, Caulerpa Prolifera, In Hillsborough Bay, Florida, City Of Tampa Department Of Sanitary Sewers
Reports
The Bay Study Group intends to periodically monitor seagrass coverage, seagrass speciecs composition, and C. prolifera coverage within Hillsborough Bay and adjacent waters. Potential relationships between various environmental parameters and seagrass coverage will be investigated. Results should provide valuable information concerning natural seagrass renewal and rates of seagrass growth. Such information is much needed in order to make sound decisions concerning seagrass restoration and viable mitigation options.
Adsorption And Kinetics Of Adsorption By Flyash In Solution, Murthy K. Jogimahanti
Adsorption And Kinetics Of Adsorption By Flyash In Solution, Murthy K. Jogimahanti
Theses
The phenomena of adsorption is extremely important in water/wastewater treatment process. A process which uses flyash as the sorbent for removing organic compounds from aqueous solutions has been investigated. Also, the rate at which this process occurs, i.e., the kinetics of adsorption, has been studied. Single solute systems were examined and the samples were analyzed using a Flame Ionization Detector Gas Chromatograph. The potentialities of adsorption on flyash as a method of renovation of water have not been realized fully, because little knowledge is available regarding the effective application of the method for this purpose.
Flyash has been known to …
Use Of Recirculation Reactor To Study Biodegradation Of Aroclor 1242, A Polychlorinated Biphenyl, Babu S. Sanji
Use Of Recirculation Reactor To Study Biodegradation Of Aroclor 1242, A Polychlorinated Biphenyl, Babu S. Sanji
Theses
The performance of immobilized microorganisms in the detoxification of hazardous waste was investigated using a recirculation flow reactor, run in a batch mode. A mixed microbial population from a wastewater treatment plant was immobilized in calcium alginate gel. The bio-oxidation ability of these microbes towards a model toxin Aroclor 1242 (R) (PCB 1242) was studied.
A non-ionic surfactant (Triton X-405 (R)) was used as a medium in the enhancement of the solubility of Aroclor 1242 in aqueous phase.
Dissolved oxygen concentration was monitored using a flow Clark-type dissolved oxygen probe. Oxygen consumption was compared to the biodegradation of Aroclor 1242. …
Pentachlorophenol And Oxygen Consumption Of Immobilized Mixed Bacterial Culture, Tesfamariam Stephanos Tsadwa
Pentachlorophenol And Oxygen Consumption Of Immobilized Mixed Bacterial Culture, Tesfamariam Stephanos Tsadwa
Theses
This study was undertaken to investigate the effects of Pentachlorophenol (PCP) concentration on oxygen consumption of immobilized microbial cells. The microbial population, from a municipal wastewater treatment plant, was immobilized in calcium alginate gel. The following studies have also been conducted in this project:
- Comparison of the effect of PCP concentration on oxygen uptake between immobilized and free cells.
- Comparison of the effects of PCP concentration on oxygen uptake between acclimated and an unacclimated bacterial beads.
Dissolved oxygen concentration was monitored using a flow Clark-type oxygen probe, in a micro-assay bioreactor. It was found that PCP concentrations higher than 2000ppm …
Use Of Economic Instruments In Biodiversity Conservation Projects: The Sustainability Of Projects In The Ecuadorian Amazon, Amy Lyons
Honors Theses
Under what conditions do biodiversity conservation projects that use economic incentives promote the most significant and sustainable biodiversity protection? The study of how nations can best invest their resources to promote conservation while simultaneously encouraging a sustainable form of economic development has recently become a major focus for ecologically rich, less-developed countries. There have been many innovative and successful attempts at combining biodiversity protection with economic development, and others that have done more harm than good. Since there is no guaranteed recipe for a successful project, it is crucial to examine projects in detail to discern which type of project …
The Probe, Issue 83 - May 1988
The Probe, Issue 83 - May 1988
The Probe: Newsletter of the National Animal Damage Control Association
GOODBYE STRYCHNINE NO ROOM FOR CATS PESTICIDE TOXICITYTexas Seminar Sugar-Coating the Bear Problem Letters to Ye Ed Tn. Wildlife Soc. Hilites
Establishing The Quantity Of Necessary Flow, Berton L. Lamb
Establishing The Quantity Of Necessary Flow, Berton L. Lamb
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
26 pages (includes illustrations).
Contains footnotes and 3 pages of references.
The Probe, Issue 81 - March 1988
The Probe, Issue 81 - March 1988
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
MARCH 1988
Monterey Pest Conference
APHIS Activity Report
EPA – The Livestock Protective Collar
Frog Dissections
Letters to Ye Ed
The Endangered Species Act (ESA), EPA, ESO
Pesticides, Scientists, Farmers, And The Public: No "White Knight" Rescue In Sight, Pamela Jones
Pesticides, Scientists, Farmers, And The Public: No "White Knight" Rescue In Sight, Pamela Jones
Vertebrate Pest Conference Proceedings: 13th (1988)
ABSTRACT: The pesticide controversy is much more complicated than simply a disagreement over facts and risk estimates between the "experts" and the "fearful." It is a battle over ideology as much as one over information. This paper discusses the notion of "educating the public" about pesticides, establishing realistic expectations of efforts by industry and academia, and notes some of the limitations, and potential involvement, of scientists as "translators" in dealing with this controversy.
Vertebrate Pesticides And Nontarget Wildlife Losses In Proper Perspective, James E. Miller
Vertebrate Pesticides And Nontarget Wildlife Losses In Proper Perspective, James E. Miller
Vertebrate Pest Conference Proceedings: 13th (1988)
ABSTRACT: The use of pesticides as one of the management tools to assist in the prevention and control of damage caused by vertebrate wildlife is certainly not new, nor has it become any less controversial in recent years. In fact, throughout the recent history of pesticide uses for control of vertebrate damage to the production of food and fiber, the prevention of potential epizootic diseases, and other potential threats to man's well-being and to the habitats and management of other wildlife resources, the use of pesticides as well as other management tools have generally been reviewed and monitored by professionals. …