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Articles 46681 - 46710 of 52477
Full-Text Articles in Entire DC Network
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.
Patterns Of Sulfur Deposition In The Wood Of Pinus Echinatia Mill. From The Cumberland Plateau In Kentucky, Darrell Ray
Patterns Of Sulfur Deposition In The Wood Of Pinus Echinatia Mill. From The Cumberland Plateau In Kentucky, Darrell Ray
Masters Theses & Specialist Projects
Air pollution and acid precipitation have long had an influence on plant and animal life. In this study, the level of sulfur in the stem tissue of Pinus echinata Mill. was measured in trees from various sites along the western edge of the Cumberland Plateau to determine the presence and pattern of sulfur deposition in this species. Overall, a 40.28% increase in sulfur levels was observed from four sites along the plateau with levels increasing from 0.072 mgS/gdwt in the 1962-66 growth increment to 0.101 mg in the 1982-86 increment. According to a computer generated analysis of variance, the differences …
The Probe, Issue 84 - June/July 1988
The Probe, Issue 84 - June/July 1988
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
JUNE/JULY 1988
The National Animal Damage Control Advisory Committee
APHIS Activity Report
Letters to Ye Ed
The Humane Society of the United States
Bird Strike Committee
Fur Controversy
ADC and Economics
Rats
Conibear Trap
Long-Term Reconstruction And Analysis Of White River Streamflow, M. K. Cleaveland, D. W. Stahle, J. G. Hehr
Long-Term Reconstruction And Analysis Of White River Streamflow, M. K. Cleaveland, D. W. Stahle, J. G. Hehr
Arkansas Water Resources Center Technical Reports
A 281-year reconstruction of White River annual runoff at Clarendon, Arkansas, was developed from a regional average of nine Oklahoma, Missouri, and Arkansas tree-ring chronologies (six post oak, Quercus stellata, and three baldcypress, Taxodium distichum). Inhomogeneity of the gaged series was detected with both double mass analysis (using state average total annual Arkansas precipitation) and regression (using the regional tree-ring average). Simple regression calibrated the homogeneous runoff data with the average ring width data from 1930 to 1980. Comparing the reconstruction with independent data verified the regression model. Variance of the reconstruction increases significantly during the 20th century, a change …
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.
The Prairie Naturalist Volume 20, No. 2. June 1988
The Prairie Naturalist Volume 20, No. 2. June 1988
The Prairie Naturalist
THE PRAIRIE NATURALIST
Volume 20, No. 2. June 1988
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
PRAIRIES AND GRASSLANDS OF THE ST. CROIX NATIONAL SCENIC RIVERWAY, WISCONSIN AND MINNESOTA ▪ D. C. Glenn-Lewin and J. M. Ver Hoef
SEED RAIN ON A NEBRASKA SAND HILLS PRAIRIE ▪ M. A. Potvin
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1987 ▪ R. N. Randall
SOUTH DAKOTA RECORDS OF PYGMY AND ARCTIC SHREWS: RESPONSE TO FIRE ▪ M. J. Gruebele and A. A. Steuter
FEEDING ECOLOGY OF THE PLAINS POCKET GOPHER IN …
Quarantine Disinfestation A Bibliography With Relevance To Ornamental Plant Material, Kevin Seaton, Daryl Joyce
Quarantine Disinfestation A Bibliography With Relevance To Ornamental Plant Material, Kevin Seaton, Daryl Joyce
Biosecurity published reports
This bibliography has been compiled as part of a programme to develop new and improved techniques for the insect disinfestation of export cut-flowers and cut-foliage. The objective of the programme is to identify the most effective disinfestation treatments. Suitable treatments should kill insects in the flowers without directly injuring the flowers or reducing their postharvest life.
The bibliography presents references relating to the disinfestation of ornamental material (i.e. cut-flowers, cut-foliage, and potted plants). However, it also includes references on disinfestation of fruit, vegetables, and stored grain where this information has some relevance to the disinfestation of ornamental materials. The bibliography …
The Concept Of Prime Agricultural Land: A Western Australian Perspective, Vivian T. Read
The Concept Of Prime Agricultural Land: A Western Australian Perspective, Vivian T. Read
Resource management technical reports
In the past, resource planning by Government authorities in Western Australia has been concentrated in urban areas. The rural areas were referred to as non-urban and planning outside of country townsites was confined to special rural zones. These zones were determined by the State authority (Town Planning Department) and were intended to limit the extent of farm fragmentation so as to control servicing costs and possible conflict.
The new State Planning Commission is expected soon to introduce the requirement of rural planning strategies for Local Government Areas where demand for land subdivision is high. The strategies will be based on …
Characterization Of The Aquatic Environment In Lake Mead Near The Proposed Spring Canyon Pumped-Storage Project, And Assessment Of Potential Aquatic Impacts, Charles R. Liston, Stephen J. Grabowski, Bureau Of Reclamation
Characterization Of The Aquatic Environment In Lake Mead Near The Proposed Spring Canyon Pumped-Storage Project, And Assessment Of Potential Aquatic Impacts, Charles R. Liston, Stephen J. Grabowski, Bureau Of Reclamation
Publications (WR)
A pumped storage system consists of an upper reservoir and lower reservoir separated by an elevation difference. During low demand energy periods such as nights and weekends water is pumped from the lower to the upper reservoir using available energy from conventional steam electric power plants. During high energy demand periods, such as mornings and afternoons of weekdays, upper reservoir water is allowed to drop back down through the same system of water conduits and turbines, generating electricity to conveniently meet abrupt electrical energy requirements. The same water turbines thus act both as pumps and as conventional hydroelectric turbines. Because …
A New Hazardous Waste Treatment Technology Utilizing Low Power Density Microwave Energy, Gabriele Else Windgasse
A New Hazardous Waste Treatment Technology Utilizing Low Power Density Microwave Energy, Gabriele Else Windgasse
Theses
Two major applications of a new hazardous waste treatment technology using low power density microwave energy have been characterized: 1) Desorption of organic materials such as: trichloro-ethylene, para-xylene, naphthalene and gasoline hydrocarbons from substrates such as: sand and granulated activated carbon was achieved by microwave induced steam distillation and the application of a new phenomenon: arcing between GAC particles when they are exposed to microwave radiation. All contaminants could be removed to 100% (non-detectable with GC and GC-MS). 2) Decomposition of organic contaminants such as: trichloro-ethylene and trichloro-ethane in arcing/heating GAC beds. A new fluidized bed reactor ("RDW-reactor", after Ray, …
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 …
Analysis Of Selected Pollutants In Complex Media, Suyi Luo
Analysis Of Selected Pollutants In Complex Media, Suyi Luo
Theses
Part one: A rapid and reliable procedure is developed for the measurement of the carcinogen benzo(a)pyrene in food. It is a streamlined hybrid of two published methods. These involve ethanalic potassium hydroxide digestion of samples, isooctane extraction, column chromatography on florisil, separation of B(a)P by thin-layer chromatography and measurement of B(a)P by fluorimetry. The recovery of a B(a)P spike of sample is 86.0 + 14.5 % . The procedure which has a limited of detection of 0.05 ng/g (0.05ppb), has been applied to the Human Exposure to B(a)P study.
Part Two: Hexachlorocyclohexane, hexachlorobenzene and some selected PCB congeners were found …
Preconcentration And Direct Flame Ionization Method For Measurement Of Non-Methane Organic Compounds In Ambient Air And Statistical Analysis Of Experimental Data, Lianyi Zuo
Theses
A fast and reliable method for the determination of non-methane organic compounds (NMOC) in ambient air has been developed. Samples are collected in SUMMA polished stainless steel canisters using a sampling system with a critical orifice as flowrate controller. Analysis of NMOC in the atmosphere via a canister is carried out by cryogenic preconcentration and a direct flame ionization detection method (PDFID). This system is sensitive and provides accurate measurement of ambient NMOC concentration even if the concentration is as low as 0.1 ppm carbon. The performance of the method was characterized using 19 pairs of canister samples and tested …
Microbial Phenol Degradation Utilizing A Complete-Mix Biological Reactor : The Effects Of Dissolved Oxygen Content, Keith Kollar
Microbial Phenol Degradation Utilizing A Complete-Mix Biological Reactor : The Effects Of Dissolved Oxygen Content, Keith Kollar
Theses
Experiments were conducted using phenol as a sole carbon source in a series of completely mixed biological reactors with solids recycle (CMBR). The reactor working volume was 4 liters, and solids were recycled from 3 liter clarifiers. Dissolved oxygen concentration (DO) was varied in order to determine the impact of this important variable on system operability.
Phenol was removed at better than 99 percent efficiency during most of the runs. Filamentous growth was not observed during any run. However, bulking did occur at higher DO levels, which was the result of microbial slime production.
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 …
A Field Perspective On Groundwater Contamination, John A. Cherry
A Field Perspective On Groundwater Contamination, John A. Cherry
Maine Collection
A Field Perspective on Groundwater Contamination
Geological Society of Maine Distinguished Lecturer John Cherry, University of Waterloo, Ontario, sponsored by the Department of Geosciences, University of Southern Maine, 19th May 1988.
Contents: Lecture 1 : Contaminant Migration Processes Illustrated by Field Experiments / Lecture 2 : Behavior of Dense Non-Aqueous Phase Liquids, Illustrated by Lab Experiments and Conceptual Examples / Lecture 3 : Field Case Histories on Groundwater Contamination / Lecture 4 : Hydrogeological Concepts and Criteria for Waste Disposal / Waterloo Center for Groundwater Research Publications List
Diet, Parasitism, And Anemia In The Prehistoric Southwest, Karl J. Reinhard
Diet, Parasitism, And Anemia In The Prehistoric Southwest, Karl J. Reinhard
School of Natural Resources: Faculty Publications
The primary goal of this study is the demonstration of the utility of parasitological data retrieved from coprolites in documenting prehistoric infectious disease. The study focuses on levels of infection of two subsistence types, hunting-gathering and agriculture. Analysis of differences between the two types, and of variation of parasitism between sites of the same type, are presented. It is demonstrated that parasitism was more common among hunter-gatherers than agricultural populations. Parasitism is shown to have been mediated by ecology and human behavior among agricultural sites.
A second goal is the integration of parasitological data with evidence of pathology derived from …
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 …
Resource Law Notes Newsletter, No. 14, May 1988, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes Newsletter, No. 14, May 1988, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)
No abstract provided.
Arcata Sports Complex Project, Susie Van Kirk
Arcata Sports Complex Project, Susie Van Kirk
Susie Van Kirk Papers
The City of Arcata is developing a sports complex, including playing fields and structures, on its property lying south and west of 7th and Union Streets. Prior to the commencement of construction, an archaeological investigation was performed to determine the extent and significance of a previously-identified prehistoric site. In addition to artifacts associated with the prehistoric time period, historic artifacts were also encountered. To assist in the evaluation of these artifacts, research of the historic component of the property was undertaken. This report discusses the historic environment and land use, land ownerships, biographical information on some of the families associated …
National List Of Plant Species That Occur In Wetlands: Intermountain (Region 8), Porter B. Reed, Jr., National Ecology Research Center
National List Of Plant Species That Occur In Wetlands: Intermountain (Region 8), Porter B. Reed, Jr., National Ecology Research Center
All U.S. Government Documents (Utah Regional Depository)
The National List of Plant Species That Occur in Wetlands represents the combined efforts of many biologists over the last decade to define the wetland flora of the United States. The U.S. Fish and Wildlife Service initially developed the list in order to provide an appendix to the Classification of Wetlands and Deepwater Habitats of the United States (FWS/OBS 79/31) to assist in the field identification of wetlands. Plant species that occur in wetlands, as used in the National List are defined as species that have demonstrated an ability to achieve maturity and reproduce in an environment where all or …
Water Current, Volume 20, May 1988
Water Current, Volume 20, May 1988
Water Current Newsletter
Major Changes in Water Center During Past Nine Years
Water Law Expert Says Policies May Cause Pollution
Director's Report, A Glance Back
On the Other End of the Phone
Sheffield Announces Tours for July and September
Annual Awards Presented at Banquet
Water Resources Program Will Study Impact of Water Quality Legislation
Change Called for at Nebraska Water Conference
Nitrate Exposure Impacts Prenatal Mortality in Beef Cattle
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
A Model Of Energy Expenditure In White-Tailed Jackrabbits (Lepus Townsendii) Based On Integrated Studies Of Energetics And Field Ecology, Gordon L. Rogowitz
A Model Of Energy Expenditure In White-Tailed Jackrabbits (Lepus Townsendii) Based On Integrated Studies Of Energetics And Field Ecology, Gordon L. Rogowitz
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Field and laboratory studies were conducted to develop a model of energy expenditure in a population of white-tailed jackrabbits (Lepus townsendii). Field work in southwestern Wyoming during 1985-87 showed that the breeding season commenced at snowmelt and ceased during late- July drought. Adult females reproduced relatively synchronously and produced a mean of three litters annually. Greatest fetal production occurred in the second litter period. Collections indicated a 1:1 sex ratio, few jackrabbits >2 years-old, and a density of 7 animals / km2 in the population. Postnatal growth was sigmoidal, culminating in heavier adult females than males. Using …
Instream Flows, The Public Trust, And The Future Of The West, Harrison C. Dunning
Instream Flows, The Public Trust, And The Future Of The West, Harrison C. Dunning
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
65 pages (includes illustrations).
Contains 28 pages of footnotes.
Instream Flow Water Rights: Arizona’S Approach, Herb Dishlip
Instream Flow Water Rights: Arizona’S Approach, Herb Dishlip
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
15 pages.
The Probe, Issue 82 - April 1988
The Probe, Issue 82 - April 1988
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
APRIL 1988
Rodenticide Update
Overview of Anticoagulant Rodenticide Usage and Resistance
APHIS Activity Report
Childhood Antiques
“Non-Pesticide” Control
Wildlife Population Control
Letters to Ye Ed
California Vertebrate Pest Conference
101 Things To Do With an Incontinent Cat
Jack Shaw Bridge, Susie Van Kirk
Jack Shaw Bridge, Susie Van Kirk
Susie Van Kirk Papers
To adequately assess the historical significance of the Mad River suspension bridge near Mountain View, commonly referred to as the Jack Shaw Bridge, it was necessary to research not only the bridge but the surrounding area as well. Resulting information provides a context or association for understanding the bridge's role in local history.
Keeping The Waters Flowing: Streamflow Protection Programs, Strategies And Issues In The West, Steven J. Shupe
Keeping The Waters Flowing: Streamflow Protection Programs, Strategies And Issues In The West, Steven J. Shupe
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
44 pages.
Contains 2 pages of footnotes.