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Articles 61231 - 61260 of 64979
Full-Text Articles in Entire DC Network
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.
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. …
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 …
Misfit Between Motivational Style And Type Of Job Demand As A Factor In Developing Occupational Stress, Arlene Gray Blix
Misfit Between Motivational Style And Type Of Job Demand As A Factor In Developing Occupational Stress, Arlene Gray Blix
Loma Linda University Electronic Theses, Dissertations & Projects
Occupational stress is costly in terms of human suffering and impaired organizational effectiveness. Occupational stress involves the interface between the individual worker and the work environment. The purpose of the study was to analyze the fit between motivational style and the type of job demands as a contributing factor in developing occupational stress symptoms. A literature review of occupational stress models was conducted. The six models compared and contrasted included the Person-Environment fit model (French, Rodgers, & Cobb, 1974), Integrative Transactional Model (Schuler, 1982), Organizational Stress Models (Ivancevich & Matteson, 1987; Parker & DeCotiis, 1983), Facet Analysis Model (Beehr & …
Feasibility Of An Extraoral Method For Predicting Manibular Incisor Relapse, Mark J. Saylor
Feasibility Of An Extraoral Method For Predicting Manibular Incisor Relapse, Mark J. Saylor
Loma Linda University Electronic Theses, Dissertations & Projects
The author undertook to develop an extraoral model for predicting mandibular incisor relapse similar to the model described by Harvey and Sheldon Peck. Whereas the Peck and Peck method involves intraoral measurements, the method described in this paper relied on the taking of measurements from the patient's pre-treatment plaster models. Two hundred and sixty teeth were measured both orally and on plaster casts, and several statistical tests were performed to isolate any differences between the intraoral and extraoral methods. The principal difference was identified as the faciolingual measurement of the incisor, due to the height of contour often being subgingival …
Anthropometric Parameters In Public School Students And Seventh-Day Adventist Vegetarian And Meat-Eating Students, Joan Sabaté-Casellas
Anthropometric Parameters In Public School Students And Seventh-Day Adventist Vegetarian And Meat-Eating Students, Joan Sabaté-Casellas
Loma Linda University Electronic Theses, Dissertations & Projects
Concerns have been expressed for the ability of some vegetarian diets to support normal growth of children. Animal protein or meat intake showed a positive relationship to attained height in children from developing countries. In this study, the relationship between meat intake/vegetarian status and physical growth was investigated in children living in California.
Height and weight were collected on 2,272 Caucasian children aged 6-18 years attending Seventh-day Adventist (SDA) or public schools who participated in a two year longitudinal study. Age-, sex-, and school-specific mean heights and weights were at or above the national reference values. Sex-specific, age-adjusted regression analysis …
Facial Typing Methods : A Comparative Study, James A. Grabow
Facial Typing Methods : A Comparative Study, James A. Grabow
Loma Linda University Electronic Theses, Dissertations & Projects
Facial typing methods are used to determine to which of three basic facial pattern categories an individual patient belongs. These three categories are mesofacial, brachyfacial, and dolichofacial. It is important to establish the correct facial type because the reaction to treatment mechanics and the stability of the denture is dependent upon the analysis of the facial patterns. The purpose of this paper was to show a comparative study of facial typing classification methods used on 100 patients (47 boys and 53 girls). The eight different methods used were as follows: Bioprogressive, Ricketts LLU1, LLU2, QuickCeph™, Jarabak, Facial-Mandibular Index, and Steiner. …
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 …
Determination Of Benzo(A)Pyrene Metabolites In The Bile Of Winter Flounder From The New York Bight, Xingmin Liu
Determination Of Benzo(A)Pyrene Metabolites In The Bile Of Winter Flounder From The New York Bight, Xingmin Liu
Theses
A method for detecting the concentration of BaP Metabolites in fish tissues has been developed. The analytical procedure includes extraction of PAH and BaP Metabolites from fish bile, liver extract and muscle extract; reduction of metabolites to BaP using hydriodic acid; and subsequent analysis of the BaP by thin layer chromatography with fluorescence detection. The method is applied to tissues from fish collected from polluted as well as clean reference waters and experimental tanks with dilutions of treated industrial wastewater. Experimental results on one kind of bottom-dwelling fish, winter flounder, which comes from the Hudson-Raritan Estuary, NY, where the water …
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 …
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 …
Investigation Of Benzo(A)Pyrene In Outdoor Air, Indoor Air And Personal Inhalation Air, Hsiu-Wen Chen
Investigation Of Benzo(A)Pyrene In Outdoor Air, Indoor Air And Personal Inhalation Air, Hsiu-Wen Chen
Theses
The assessment of human exposure to an environmental contaminant requires the measurement of the concentrations levels present in each pathway of possible contact.
This was an investigation of human exposure to an environmental pollutant, benzo(a)pyrene, in outdoor air, indoor air and personal inhalation air samples. The analytical procedure involved extraction by ultrasonic and separation by thin layer chromatography, and detection by fluorescence. The resulting data was used to develop a profile of indoor and outdoor human exposure to B(a)P during the year.
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 …
Origins Of The Quantum Efficiency Duality In The Primary Photochemical Event Of Bacteriorhodopsin, Robert R. Birge, Leonore A. Findsen, Albert F. Lawrence, Mark Masthay, Chian-Fan Zhang
Origins Of The Quantum Efficiency Duality In The Primary Photochemical Event Of Bacteriorhodopsin, Robert R. Birge, Leonore A. Findsen, Albert F. Lawrence, Mark Masthay, Chian-Fan Zhang
Chemistry Faculty Publications
Experimental and theoretical evidence is presented which suggests that two distinct forms of light-adapted bacteriorhodopsin may exist. We propose that these two forms have characteristic photocycles with significantly different primary quantum yields. INDO-PSDCI molecular orbital procedures and semiempirical molecular dynamics simulations predict that one ground state geometry of bR undergoes photochemistry with a primary quantum yield, Φ1, of ~ 0.27, and that a second ground state geometry, with a slightly displaced counterion, yields Φ1 ~ 0.74. This theoretical model is supported by the observation that literature measurements of Φ1 tend to fall into one of two categories- those that observe …
The Prairie Naturalist Volume 21, No.2 June 1989
The Prairie Naturalist Volume 21, No.2 June 1989
The Prairie Naturalist
THE MISSISSIPPI KITE IN THE ENVIRONMENTAL HISTORY OF THE SOUTHERN GREAT PLAINS ▪ E. G. Bolen and D. L. Flores
TAPE-RECORDED CHICK CALLS TO LOCATE GRAY PARTRIDGE NESTS ▪ J. P. Carroll
BORROW DISTRIBUTION OF THE THIRTEEN-LINED GROUND SQUIRREL IN GRAZED MIXED-GRASS PRAIRIE: EFFECT OF ARTIFICIAL HABITAT STRUCTURE ▪ D. W. Kaufman and G. A. Kaufman
PIPING PLOVERS NESTING AT NELSON RESERVOIR, MONTANA ▪ D. W. Prellwitz, T. A. Prellwitz, K. L. Stutzman, and J. W. Stutzman
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1988 ▪ R. N. Randall
CHANGING HABITATS IN THE PLATTE RIVER VALLEY OF NEBRASKA ▪ J. …
Santa Clara Magazine, Volume 31 Number 3, Spring 1989, Santa Clara University
Santa Clara Magazine, Volume 31 Number 3, Spring 1989, Santa Clara University
Santa Clara Magazine
10 - VISION Santa Clara's new president talks about his priorities for the University in the decade ahead.
15 - FAMILY IN CRISIS Is the Silicon Valley family an endangered species?
18 - DUBLIN: CITY OF 1,000 YEARS Today it is a bustling European capital. But progress has come at a price.
22 - GEORGE AND THE SILVER FOX A behind-the-scenes look at President and Mrs. Bush.
27 - WHO SHALL CARE .. . AND HOW? By 2020 every fourth American may be 65 or over.
Resource Law Notes Newsletter, No. 17, Apr. 1989, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes Newsletter, No. 17, Apr. 1989, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)
No abstract provided.