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Articles 46381 - 46410 of 52487
Full-Text Articles in Entire DC Network
Interjurisdictional Relations Under Federal Water Quality Law: A Guide Through The Maze, Michael C. Blumm, Daniel Rohlf
Interjurisdictional Relations Under Federal Water Quality Law: A Guide Through The Maze, Michael C. Blumm, Daniel Rohlf
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
53 pages.
Contains references.
Allocation And Use Of International Rivers: Recent Developments In International Law, Daniel Barstow Magraw
Allocation And Use Of International Rivers: Recent Developments In International Law, Daniel Barstow Magraw
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
26 pages.
Contains references.
Allocating Groundwater Among Nations, States And Tribes, Ann Berkley Rodgers, Carolyn J. Abeita
Allocating Groundwater Among Nations, States And Tribes, Ann Berkley Rodgers, Carolyn J. Abeita
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
70 pages.
Managing The Upper Rio Grande: Old Institutions, New Players, Steven J. Shupe
Managing The Upper Rio Grande: Old Institutions, New Players, Steven J. Shupe
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
19 pages.
The Colorado River Compact: A Breeding Ground For International, National, And Interstate Controversies, John U. Carlson
The Colorado River Compact: A Breeding Ground For International, National, And Interstate Controversies, John U. Carlson
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
38 pages.
Contains references.
Arkansas River Controversy, David W. Robbins
Arkansas River Controversy, David W. Robbins
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
14 pages.
Agenda: Boundaries And Water: Allocation And Use Of A Shared Resource, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Boundaries And Water: Allocation And Use Of A Shared Resource, University Of Colorado Boulder. Natural Resources Law Center
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Lawrence J. MacDonnell and Charles F. Wilkinson.
Boundaries and Water: Allocation and Use of a Shared Resource is the topic of the Center's annual summer program on water this June. Most of the major rivers in the western United States are shared between two or more states. Often tribal governments play an important role in water allocation and use decisions. International considerations also may be involved in some cases. These interjurisdictional issues extend to groundwater as well as surface water.
This conference will provide the …
Allocation Of The Nation’S Waters: The Constitutional Framework, Charles F. Wilkinson
Allocation Of The Nation’S Waters: The Constitutional Framework, Charles F. Wilkinson
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
19 pages.
Interstate Allocation Of The Platte River, J. David Aiken
Interstate Allocation Of The Platte River, J. David Aiken
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
27 pages.
Contains references.
Determining Pesticide And Nitrate Levels In Spring Water In Northwest Arkansas, T. L. Lavy, B. A. Dehart, John D. Mattice
Determining Pesticide And Nitrate Levels In Spring Water In Northwest Arkansas, T. L. Lavy, B. A. Dehart, John D. Mattice
Arkansas Water Resources Center Technical Reports
Occurrences of pesticides in our nations ground water are on the rise. As states become aware of this problem and begin monitoring programs, incidence of contamination will probably increase. Since the problem of pesticides in groundwater is relatively new, little research has centered on the fate of pesticides after they reach the groundwater environment. In Northwest Arkansas efforts to monitor groundwater for pesticides have been small. Twenty-five springs in Northwest Arkansas were sampled in the fall of 1988, and spring of 1989. Analysis for atrazine, alachlor, metolachlor, diuron, and simazine in spring water was preformed using gas liquid chromatography and …
Analysis, Design And Implementation Of A Pilot Relational Database For Groundwater In The State Of Arkansas, Ray Hashemi-Nassab
Analysis, Design And Implementation Of A Pilot Relational Database For Groundwater In The State Of Arkansas, Ray Hashemi-Nassab
Arkansas Water Resources Center Technical Reports
There are several agencies within the state of Arkansas dealing with underground water. Each agency has its own database that acts as an isolated depository of data. Practically, the communication among these databases is zero, not because there is no need for it, but because the communication is very difficult if not impossible. Data redundancy, inconsistency, and lack of integrity is overwhelming. In this study we have addressed the problem of lack of unity among the databases belonging to different agencies. Also, as an alternative we have developed a relational database. In this database the data was normalized to 4NF. …
An Expert System For Managing An Activated Sludge Wastewater Treatment Plant, Sandra C. Parker, David G. Parker
An Expert System For Managing An Activated Sludge Wastewater Treatment Plant, Sandra C. Parker, David G. Parker
Arkansas Water Resources Center Technical Reports
A diagnostic expert system for an activated sludge wastewater treatment plant has been designed to link with a relational database management system for obtaining operational parameter values that are used by the program to diagnose operational problems that may occur in the process. The problems that are dealt with by the system are bulking sludge, floating sludge, defloculation, ashing, solids washout, foaming problems, high soluble effluent BOD and problems in the aeration system. The link between the expert system and the database is accomplished via programming that is initiated by the expert system program. The operator of the system is …
Minimizing The Potential For Groundwater Contamination From Agricultural Point Sources, Joseph H. Massey, Terry L. Lavy, John D. Mattice
Minimizing The Potential For Groundwater Contamination From Agricultural Point Sources, Joseph H. Massey, Terry L. Lavy, John D. Mattice
Arkansas Water Resources Center Technical Reports
An activated charcoal filtration unit was designed to remove pesticides from leftover pesticide solutions and rinsates generated under farm-like conditions. The system, fabricated for less than $1400 using readily available components, effectively removed the pesticides atrazine, benomyl, carbaryl, fluometuron, metolachlor, and trifluralin from wastewater generated on the University of Arkansas Agronomy Farm located in Fayetteville, AR. A total of 2253 L of wastewater were treated using the system. Of these 1768 L were generated from washing out the spray tank (rinsates) while 485 L stemmed from leftover pesticide solutions that were mixed, but not applied. Typical initial pesticide concentrations in …
Improving Irrigation Scheduling And Water Use Efficiency In Cotton, Derrick M. Oosterhuis
Improving Irrigation Scheduling And Water Use Efficiency In Cotton, Derrick M. Oosterhuis
Arkansas Water Resources Center Technical Reports
Cotton (Gossypium hirsutum L) is an important crop in the southern United States. The crop is grown in both irrigated and rainfed situations and is seldom free from periods of water shortages at some stage during the season. In recent years the need for consistency in yields and a stable cash flow has resulted in a rapid expansion in the number of irrigated acres of cotton in the Mississippi Delta. Irrigation research has, however, not kept pace with this expansion. This project represents a start at meeting this urgent need. The influence of weather patterns necessitates that these studies be …
Simulation Of The Fate Of Nitrogen From The Disposal Of Poultry Litter, H. D. Scott
Simulation Of The Fate Of Nitrogen From The Disposal Of Poultry Litter, H. D. Scott
Arkansas Water Resources Center Technical Reports
A PC/AT computer model was developed to simulate the transport of water, nitrate and ammonia in the soil profile after an application of poultry litter to pasture. The model was written using FORTRAN 77 compiler and can be used on any IBM type compatible computer with a math coprocessor. Poultry litter has been shown to be a potential source of plant nutrients, but mismanagement can result in nitrate pollution of the surface and groundwater. The model is composed of a main program, 11 subroutines and three subprograms. An example was shown of the flexibility and dynamic nature of the computer …
Presentation Of Verified Algal Taxa As Reference Sources, Richard L. Meyer
Presentation Of Verified Algal Taxa As Reference Sources, Richard L. Meyer
Arkansas Water Resources Center Technical Reports
A data base of the algae of Arkansas ecoregions has been established to describe the numerous taxa that occur within the aquatic ecosystems included in these regions. The organisms were identified with the aid of diverse literature from throughout the world. These sources are written in multiple languages and the living organisms had to be compared with outline or silhouette drawings. These illustrations may include shading, but none present the true color of the organism but only the characteristics of the descriptive source. Primary characteristics used to identify algae is based upon pigmentation of the plastid and the number and …
The Nebraska Natural Heritage Program: Two Year Progress Report, Mary Clausen, Mike Fritz, Gerry Steinauer
The Nebraska Natural Heritage Program: Two Year Progress Report, Mary Clausen, Mike Fritz, Gerry Steinauer
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Since European settlement, human activities have totally eliminated the natural vegetation from approximately 50 percent of Nebraska’s landscape, and of that remaining most has been heavily impacted. As a result, numerous plants and animals have been extirpated from the state and many others are threatened.
The destruction of Nebraska’s natural diversity resulted in both public and private conservation groups recognizing the need for a centralized and accessible biological database for the state’s rare species and natural community types. Toward this end, the Nebraska Natural Heritage Program (NENHP) was established in August, 1987 through a cooperative effort between The Nature Conservancy …
The Probe, Issue 93 - June 1989
The Probe, Issue 93 - June 1989
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
JUNE 1989
NADCA Lottery
APHIS Activity Report
Murphy’s Law of Pest Control
PURR-ESTROIKE COULD BRING BETTER LIFE
FOR SOVIET CATS
Letters to Ye Ed
Personnel
Animal Rights
Temporal And Spatial Patterns Of Abundance Of Age 0 Threadfin Shad (Dorosoma Petenense) In Overton Arm, Lake Mead, William Lee Pelle
Temporal And Spatial Patterns Of Abundance Of Age 0 Threadfin Shad (Dorosoma Petenense) In Overton Arm, Lake Mead, William Lee Pelle
Publications (WR)
Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of a larger, game fishery enhancement study (Lake Mead Fertilization Project), designed to assess feasability of increasing survivorship of larval/juvenile shad by boosting phosphate levels, thereby increasing algal and zooplankton biomass, during the shad spawning period. Shad are the primary forage base for the striped bass (Morone saxatilis) and black bass (Macropterus salmoides) fisheries. Weekly samples were …
Water Resources Review - June 1989, Annis Water Resources Institute
Water Resources Review - June 1989, Annis Water Resources Institute
AWRI Reviews
No abstract provided.
Investigation Of Major Mutagenic Substances In Airborne Particulate Matter : Biologically-Driven Analysis Of Fractions And Analysis Of Polycyclic Aromatic Hydrocarbons (Pahs) Nitro-Pahs And Other Classes Of Compounds, Jung-Hen Lwo
Theses
A modified fractionation scheme involving acid-base partitioning and silica gel column chromatography has been used as the first step in the bioassay-directed search for significant levels of mutagenic compounds in extracts of inhalable (IP10) ambient air particulates. The biologically "hot" fractions were separated and analyzed chemically or subfractionated to isolate and concentrate "hot" subfractions which were then chemically analyzed by GC/MS FTIR, and HPLC equipped with UV, Fluorescence and Photodiode Array UV detectors.
The Ames assay of mutagenicity has involved the unactivated TA98 strain of Salmonella and enzyme-activated (TA98+S9) assays. In addition, some assays have been performed in this present …
Determination Of Trace Amounts Of Lead, Cadium And Zinc In Vegetables Using Differential Pulse Polarography, Elizabeth Franca-Romitti
Determination Of Trace Amounts Of Lead, Cadium And Zinc In Vegetables Using Differential Pulse Polarography, Elizabeth Franca-Romitti
Theses
Toxic metals are present in foods to greater or lesser extention as contaminants, as a result of increasing industrialization, and associated pollution of the biosphere. Lead and cadmium are well known toxic metals which accumulate into the body causing harmful effects at low concentration levels especially in children. Zinc, on the other hand, is an essential micronutrient, but larger levels in foods can be considered toxic.
Twenty eight brands of vegetables including canned, glass packed, frozen and fresh vegetables were analyzed for Pb, Cd, and Zn, in tomatoes, carrots, mushrooms and asparagus. The technique used was Differential Pulse Polarography (DPP) …
Microbial Competition In The Biodegradation Of Phenol, Mary Ellen Frank
Microbial Competition In The Biodegradation Of Phenol, Mary Ellen Frank
Theses
Three phenol degraders were isolated from the mixed liquor of the Livingston, NJ municipal treatment plant. Shaker flask experiments using one of the degraders (a Pseudomonas sp.) resulted in the determination of its kinetic rate constants. The second phenol degrader (a Xanthamonas) lost its phenol degrading ability while being stored, and its kinetic rate constants could not be determined. The third phenol degrader (a Pseudomonas cepacia) formed flocs which interfered with the spectrophotometric determination of biomass and therefore its kinetic rate constants also could not be determined.
Mixed culture experiments were carried out using a the Pseudomonas sp. and a …
Thermal Decomposition Of 1,1,2- Trichloroethane In Hydrogen In Tubular Flow Reactors At Atmospheric Pressure, Chen-Chung Yeh
Thermal Decomposition Of 1,1,2- Trichloroethane In Hydrogen In Tubular Flow Reactors At Atmospheric Pressure, Chen-Chung Yeh
Theses
The decomposition of 1,1,2-trichloroethane in a hydrogen gas bath was carried out at 1 atmosphere total pressure in three different surface to volume ratio flow reactors. Temperature ranged from 440 to 850 °C and the residence times studied were in the range 0.2 - 2.3 seconds. Application of the first order rate expression to this data yields a linear relationship for each temperature studied and thus global rate constants for loss of reactant were determined.
It was found that conversion of the reagent was a function of both temperature and residence time. The major products observed are 1, 2-dichloroethylene (CHClCHCl), …
Study Of An Analytical Method For Benzo(A)Pyrene Metabolites In Human Urine, Zheng Ouyang
Study Of An Analytical Method For Benzo(A)Pyrene Metabolites In Human Urine, Zheng Ouyang
Theses
A method developed by Becher and Bjorseth for analysis of PAH metabolites in urine was employed to investigate human exposure to benzo(a)pyrene (BaP) - an ubiquitous environmental carcinogen. Preliminary results are presented showing the relationship between exposure to BaP and urinary elimination. Although the correlation between the two variables is not statistically significant, there appears to be a positive association with selected exposure varibles such as smoking. The identification of an association may establish urinary BaP as a marker of exposure.
However, detailed study of the analytical procedure indicated that recoveries with this method were as low as 3-8% for …
Organics In Ambient Air By Collection On Tenax, Thermal Desorption,And Capillary Chromatography With Parallel Fid/Ecd Analysis, Chih-Hsiang Liao
Organics In Ambient Air By Collection On Tenax, Thermal Desorption,And Capillary Chromatography With Parallel Fid/Ecd Analysis, Chih-Hsiang Liao
Theses
Volatile organics in ambient air were regularly collected on Tenax cartridges at high (10 ml/min) and low (5 ml/min) intake flows. These Tenax samples were analyzed by using a Tekmar Automatic Thermal Desorber and capillary GC system with parallel flame ionization (FID) and electron capture detectors (ECD). A series of quality assurance procedures has been established to improve and assure the accuracy and precision of sample collector and analysis. These procedures relate to performance of the Tekmar thermal desorber, recovery efficiency from the Tenax, and include studies on breakthrough and co-elution. The results demonstrate (1) that from ambient air data …
Characterization Of Activated Sludge Immobilized In Calcium Alginate Gel With Respect To Biodegradation Of 2-Chlorophenol And Benzene, Manjari Singh
Characterization Of Activated Sludge Immobilized In Calcium Alginate Gel With Respect To Biodegradation Of 2-Chlorophenol And Benzene, Manjari Singh
Theses
Activated sludges acclimated with phenol and 2-chlorophenol in one case, and a mixture of benzene, toluene, and o, in and p-xylene in another case, were characterized for biodegradation of 2-chlorophenol and benzene, respectively. Activated sludge was obtained from the Parsippany-Troy Hills Water Pollution Control Plant (NJ).
For both cases colonies were isolated before acclimation, after acclimation, and at the end of biodegradation studies. Since the unacclimated group was the same in both cases, there were a total of five different groups for which characterization was carried out.
For all the five groups together, a total of 54 isolates were obtained …
Thermal Desorption Of Hazardous And Toxic Organic Compounds, Manuel S. Nolau
Thermal Desorption Of Hazardous And Toxic Organic Compounds, Manuel S. Nolau
Theses
The purpose of this thesis is to study the thermal desorption behavior of toxic organic compounds, specifically o-xylene, p-xylene, ethyl benzene, p-chlorotoluene, and anthracene, from soil with respect to temperature and time, and to develop a mathematical model that will describe this desorption behavior. The model will allow prediction of the concentration of an organic contaminant in commercial soil desorption system over time given a known set of parameters of the specific chemical as well as flow rate and temperature. For this purpose, two sets of experiments were done: These are identified as 1. Thermal desorption and 2. plug flow …
Microwave Treatment Of Organic Contaminated Soil, Suning Fan
Microwave Treatment Of Organic Contaminated Soil, Suning Fan
Theses
The development of microwave technology to treat hazardous wastes hasbeen in progress at NJIT for the past three years. The initial stagesof this program have focused on determining the' breadth of hazardouswaste problems that are amenable to microwave technology applications.Benchscale studies have shown the following processes are technicallypossible:
a. It is possible to steam strip organic volatiles from soil;
b. Volatiles can be destroyed by impact upon lossy so lids
c. Heavy metal ions can be immobilized in soil;
d. It is possible to regenerate GAC on-site.
e. It is possible to pyrolyze polyarmotic compounds in soil in-site,and, thereby, effect …
Thermal Desorption Of Hazardous And Toxic Organic Compounds From Soil Matrices, Sarah Calandra
Thermal Desorption Of Hazardous And Toxic Organic Compounds From Soil Matrices, Sarah Calandra
Theses
The purpose of this research project was to determine feasiblity to remove organic contaminants from various soil matrices by thermal desorption and gas purge. The volatization and gas purge of organic contaminants from the soil increases under the influence of heat and inert gas.
The work was done in two parts. First, under isothermal conditions, organic compounds were injected as a plug unto columns that contained real or simulated soil matrices. These columns were continuously purged with a carrier gas (nitrogen) and a gas chromatogragh equipped with Flame Ionization Detector but no added column other than the soil was used …