Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Nebraska - Lincoln (11836)
- Utah State University (2745)
- University of Nevada, Las Vegas (1856)
- William & Mary (1843)
- University of Colorado Law School (1643)
-
- Western Washington University (1574)
- China Coal Technology and Engineering Group (CCTEG) (1307)
- Portland State University (1247)
- Department of Primary Industries and Regional Development, Western Australia (1230)
- University of Kentucky (1179)
- Chulalongkorn University (1081)
- Selected Works (1070)
- Montana Tech Library (976)
- University of Arkansas, Fayetteville (860)
- City University of New York (CUNY) (833)
- SIT Graduate Institute/SIT Study Abroad (663)
- University of South Florida (657)
- Clemson University (575)
- Old Dominion University (515)
- Louisiana State University (501)
- Loyola Marymount University and Loyola Law School (482)
- South Dakota State University (477)
- The University of Maine (467)
- University of Vermont (459)
- Montclair State University (451)
- University of Texas Rio Grande Valley (430)
- Edith Cowan University (388)
- SelectedWorks (388)
- University of Tennessee, Knoxville (344)
- University of Texas at El Paso (326)
- Keyword
-
- Climate change (1031)
- Sustainability (916)
- Water quality (853)
- Western Australia (779)
- Research and Technical Reports (657)
-
- United States (597)
- Conservation (531)
- Environment (498)
- Ecology (485)
- Management (476)
- Groundwater (470)
- 2014 International Conference on Hydroinformatics HIC (465)
- GIS (461)
- California (428)
- Virginia (417)
- Agriculture (408)
- Water (383)
- Colorado (348)
- Climate (334)
- Energy (310)
- Natural resources (310)
- Utah (302)
- Gas (301)
- Drought (280)
- Remote sensing (273)
- Hydrology (263)
- Invasive species (261)
- Land use (256)
- Salinity (251)
- And Energy; Structural Materials; Sustainability (248)
- Publication Year
- Publication
-
- Reports (1628)
- School of Natural Resources: Faculty Publications (1585)
- United States Department of Agriculture Wildlife Services: Staff Publications (1546)
- Coal Geology & Exploration (1307)
- Silver Bow Creek/Butte Area Superfund Site (963)
-
- Thai Environment (937)
- Salish Sea Ecosystem Conference (806)
- Electronic Theses and Dissertations (760)
- Independent Study Project (ISP) Collection (626)
- Theses and Dissertations (557)
- United States Geological Survey: Staff Publications (513)
- The Prairie Naturalist (483)
- Great Plains Wildlife Damage Control Workshop Proceedings (478)
- World of Coal Ash Proceedings (472)
- International Conference on Hydroinformatics (464)
- United States Department of Commerce: Staff Publications (424)
- Theses (409)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (399)
- Arkansas Water Resources Center Technical Reports (367)
- LSU Master's Theses (359)
- School of Natural Resources: Dissertations, Theses, and Student Research (343)
- USF Tampa Graduate Theses and Dissertations (341)
- S.C. Water Resources Conference (336)
- Journal of the Department of Agriculture, Western Australia, Series 4 (334)
- Open Access Theses & Dissertations (326)
- Memorandum (316)
- School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations (306)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (305)
- Water Current Newsletter (291)
- Resource management technical reports (287)
- Publication Type
Articles 43111 - 43140 of 52751
Full-Text Articles in Physical Sciences and Mathematics
Fisheries And Wildlife Habitat Incentive Programs In Missouri: Partnerships In Land Stewardship, Robert A. Pierce Ii
Fisheries And Wildlife Habitat Incentive Programs In Missouri: Partnerships In Land Stewardship, Robert A. Pierce Ii
Triennial National Wildlife and Fisheries Extension Specialists Conference: 8th (1996)
Fish and wildlife resources are highly valued by Missourians. Over 70% of Missouri residents annually participate in fisheries and wildlife activities. However, the future of fisheries and wildlife conservation depends to a large extent on the land-use decisions made by landowners, as approximately 93% of the state is under private ownership. These landowners have different motivations, circumstances, and land ownership objectives which govern their management decisions.
Educational programs which enable landowners to make informed decisions regarding the conservation of fish and wildlife are critical to land stewardship and resource sustainability. Although idealistic concepts, "stewardship" implies "care and responsible management" of …
Perspective On Natural Resources Extension For The 21st Century, Merrill Petoskey
Perspective On Natural Resources Extension For The 21st Century, Merrill Petoskey
Triennial National Wildlife and Fisheries Extension Specialists Conference: 8th (1996)
Speaking to this group of fish, wildlife, and natural resources professionals is getting to be a habit with me, having talked at this workshop three times in the past 2 decades. This is the fourth.
The first time was in 1977, I was gainfully employed as Director of Wildlife Management for the U.S. Forest Service (USFS). I'm not quite sure why I was at your meeting. I expect my good friend, Jim Miller, trapped me because of some earlier discussions we had on grazing on the Ouachita National Forest in Arkansas. Regardless, at the time, I suggested that funding, in …
Sustainable Channel Catfish Farming: Low Management Production Through Modified Stocking And Feeding Practices, William A. Wurts, Forrest Wynne
Sustainable Channel Catfish Farming: Low Management Production Through Modified Stocking And Feeding Practices, William A. Wurts, Forrest Wynne
Triennial National Wildlife and Fisheries Extension Specialists Conference: 8th (1996)
Sustainability has become the recent "buzz-word" in aquaculture and agriculture. As Claude Boyd indicated in San Diego (Aquaculture '95), aquaculture is not truly sustainable because aquaculture relies on external feed, chemical, and energy inputs. The United States Farm Bill of 1990 more narrowly defined the key components of sustainability as: maintaining profitability, supplying food and fiber needs, using non-renewable resources efficiently, enhancing renewable resources, and improving the quality of life in rural areas.
Interdisciplinary And Multidisciplinary Public Education By Combining Consensus-Based Planning And Environmental Analysis, Sherman Swanson, Robert Wilson
Interdisciplinary And Multidisciplinary Public Education By Combining Consensus-Based Planning And Environmental Analysis, Sherman Swanson, Robert Wilson
Triennial National Wildlife and Fisheries Extension Specialists Conference: 8th (1996)
In extension, we educate people to improve their lives. In natural resources extension, we educate people to improve life. Resolving issues often does this. In natural resources extension we also resolve issues to educate people.
As educators we steer clear of some issues to avoid the hazards. We may refrain from choosing sides. When we choose sides, we often tarnish the perceived objectivity of our University. Yet issues provide the need for knowledge, the teachable moments, and the set and focus that translates knowledge exposure into learning. When issues involve common resources, shared or conflicting interests, complications from complex or …
Regional Standards For Rangeland Health And Guidelines For Livestock Grazing Management ... A Progress Report
Range Management
In August 1995, new BLM regulations for rangeland administration went into effect. The new regulations require BLM to establish regional standards for rangeland health and guidelines for grazing management. This publication is a report on the alternatives being considered for the Montana/Dakotas Rangeland Health Standards and Guidelines process.
Hepatic Cytochromes P450 Enzyme Activities Of Uae Coastal Rabbit Safi Fish Siganus Canaliculatus, Amna Mana Al-Otaiba
Hepatic Cytochromes P450 Enzyme Activities Of Uae Coastal Rabbit Safi Fish Siganus Canaliculatus, Amna Mana Al-Otaiba
Theses
The cytochrome P450 dependent metabolism of benzo(a)pyrene and other xenobiotics has been investigated in liver microsomes prepared from a local marine Safi fish Siganus canaliculatus caught from the Arabian Gulf of United Arab Emirates. The Safi fish was found to have a well developed liver microsomal monooxygenase system consisting of cytochrome P450, cytochrome b5 and NADPH-cytochrome c reductase. The fish microsomal enzyme system was able to metabolise benzo(a)pyrene, 7-ethoxycoumarin and 7- ethoxyresorufin. Male fish were found to exhibit a higher monooxygenase activity than female fish. Treatment of fish with β-naphthoflavone was found to induce (2-4 fold) the activities of aryl …
Environmental Study Indoor And Outdoor Of The Abu Dhabi Compost Plant, Jaber Eidha S. Aljabri
Environmental Study Indoor And Outdoor Of The Abu Dhabi Compost Plant, Jaber Eidha S. Aljabri
Theses
The transformation of municipal solid waste into compost is of double interest: on the one hand, it helps to avoid the deficiencies of natural manure, and on the other it eliminates this major polluting agent which is increasing progressively as a consequence of rising populations.
Domestic waste produced per person per annum amounts to 730 kg in Abu Dhabi city. Based on a population in 1992 of 574,745, this gives a current daily refuse collection that amounts to 1120 tons. Refuse is reported to contain a high proportion of organic materials and therefore to be suitable for recycling to produce …
Environmental Management And Treatment Of Oily Water In Abu Dhabi Offshore Oil Fields, Mohamed Ali Saeed Al-Nuaimi
Environmental Management And Treatment Of Oily Water In Abu Dhabi Offshore Oil Fields, Mohamed Ali Saeed Al-Nuaimi
Theses
The purpose of this environmental case study is to evaluate the oily water treatment efficiency in the separation of oil from water in relation to the environmental impact to the marine environment. This study covers offshore oil fields production facilities in the Abu Dhabi Emirate. The study discusses the most commonly used methods in the separation of oily water disposals. It highlights in detail the different types of treatment systems currently in use at Abu Dhabi offshore oil fields production facilities. Emphasis is given to the performance of each treatment system, its deficiencies and possible areas of improvement.
The study …
Application Of Tube Settlers In Secondary Wastewater Treatment, Abdulsalam Mohamed Saleh Kamalpoor
Application Of Tube Settlers In Secondary Wastewater Treatment, Abdulsalam Mohamed Saleh Kamalpoor
Theses
Secondary sedimentation is one of the most commonly used unit operations in wastewater treatment plants. It is customary designed to achieve solids separation from biologically treated effluent through clarification of biological solids and thickening of sludge. As treatment plants receive increasingly high wastewater flow, conventional sedimentation tanks suffer from overloading problems which result in poor performance. Inclined plate settlers, a form of tube settlers, may have good potential in upgrading sedimentation tanks. This study was conducted to examine the possibility of applying inclined plate settlers in secondary sedimentation in order to upgrade conventional rectangular sedimentation tanks and improve their performance. …
Maintaining Conventional Septic Systems, William O. Thom, Pat Keefe
Maintaining Conventional Septic Systems, William O. Thom, Pat Keefe
Agriculture and Natural Resources Publications
Septic systems are used in Kentucky where municipal sewage treatment is not available. They are an effective, longstanding method of collecting, treating, and disposing of homeowner wastewater, provided they are properly sited, installed, and maintained. However, a well-sited, properly sized and installed system will fail if not properly maintained. A failed septic system creates problems such as noxious odors, lowered property values, surface water contamination, and groundwater pollution and may be a health hazard. Repair and replacement costs are considerable. Additional information on assessing septic system performance and reducing the potential risk of groundwater contamination is available from a KY-A-Syst …
Advances In Wetland Status And Trends Monitoring Cumulative Error Comparisons, Stacie A.C. Nelson, Virginia Institute Of Marine Science, Wetlands Program
Advances In Wetland Status And Trends Monitoring Cumulative Error Comparisons, Stacie A.C. Nelson, Virginia Institute Of Marine Science, Wetlands Program
Reports
No abstract provided.
Influence Of Rice Production On The Quality Of Water In Tailwater Collection Reservoirs, R. A. Dewell, T. L. Lavy
Influence Of Rice Production On The Quality Of Water In Tailwater Collection Reservoirs, R. A. Dewell, T. L. Lavy
Arkansas Water Resources Center Technical Reports
Since maintaining high water quality standards in the state remains a high priority, monitoring for pesticides in water sources must continue. Determining the type, concentration, and characteristics of any pesticides present in water supplies are essential to the overall assessment of water quality. Five independent locations, implementing contained water management systems and recyclable water, were monitored in 1995 and 1996. Irrigation, runoff, and pond water samples were collected every 10 to 14 days between permanent flood establishment and draining. Water samples were transported to the laboratory and extracted for 16 pesticides using solid phase extraction (SPE) techniques. Quantification and confirmation …
Effects Of Zebra, Mussel, Dreissena Polymorpha Infestation On Lake Dardanelle Water Quality, Charles J. Gagen, Joseph N. Stoeckel
Effects Of Zebra, Mussel, Dreissena Polymorpha Infestation On Lake Dardanelle Water Quality, Charles J. Gagen, Joseph N. Stoeckel
Arkansas Water Resources Center Technical Reports
Zebra mussels recently invaded southern waterways including the Arkansas River. Large-scale filtration of suspended particulate matter by dense populations could alter reservoir ecosystem function. Furthermore, they attach to hard surfaces, thereby threatening normal operations of artificial structures. We designed this study to provide baseline data prior to establishment of high population levels of zebra mussels in Lake Dardanelle. The characterization of spatial and temporal variability in water quality, zooplankton, phytoplankton, and macrophytes will allow testing of several hypotheses. We sampled zebra mussel veliger and settling juvenile densities and zooplankton densities at four fixed sites and the key water quality variables …
Bioaccumulation Of Methyl Mercury Through A Food Chain, J. T. Knight
Bioaccumulation Of Methyl Mercury Through A Food Chain, J. T. Knight
Arkansas Water Resources Center Technical Reports
The bioaccumulation of mercury through the food chain has received much attention in Arkansas during the last three years. The discovery of mercury contamination and subsequent fish consumption advisories in southwest Arkansas have increased public awareness of the potential for bioaccumulation of different toxic compounds. It is postulated that the mercury problem in Arkansas is a result of methylation and resulting bioaccumulation of mercury as methyl mercury. This study was designed to derive a Bioaccumulation Factor (BAF) for mercury in a simple food chain under controlled conditions. A BAF is calculated by dividing the concentration found in the organism by …
Continuous Monitoring Of Volatile Organic Compounds Using Microtrap Based Gas Chromatographic Systems, Yonghua Xu
Continuous Monitoring Of Volatile Organic Compounds Using Microtrap Based Gas Chromatographic Systems, Yonghua Xu
Dissertations
Continuous analysis allows a representative portion of a sample to flow continuously through an analytical instrument, which gives analytical information with little or no delay in time. A microtrap is a small diameter tube packed with adsorbents in series. When a gaseous sample containing volatile organic compounds (VOCs) flows through the microtrap, the VOCs can be trapped selectively by adsorbents. Then a pulse of electrical current is applied to the microtrap. This rapid heating results in a desorption that can act as a sharp injection for GC separation. Thus the microtrapped sample is the total amount of VOC present in …
Pollution Prevention In The New Jersey Chemical Industry : Motivations And Barriers To Commitment, Judith A. Thornton
Pollution Prevention In The New Jersey Chemical Industry : Motivations And Barriers To Commitment, Judith A. Thornton
Theses
This study of the New Jersey Chemical Industry identifies the primary elements that lead to or inhibit company commitments to pollution prevention. A direct measure of facility pollution prevention commitment is developed that takes into account: organizational support attributes, past reductions achievements, current methods implementation, process reduction goals, and special environmental initiatives. The "P2 Commitment Index" allows for categorization of facilities so that the needs and interests of varying groups may be differentiated.
Higher level commitments are associated with: establishment of company pollution prevention policy, setting of prioritized facility goals, and measurement and reporting on pollution prevention progress. Facilities at …
Oxidation Of Isobutane And Isobutene Reaction Pathways And Detailed Mechanism, Chiung-Ju Chen
Oxidation Of Isobutane And Isobutene Reaction Pathways And Detailed Mechanism, Chiung-Ju Chen
Theses
A reaction mechanism consisting of 248 elementary reactions and 138 species has been developed to model experimental systems - decomposition of 2,2,3,3 tetramethylbutane in the presence of oxygen and oxidation of isobutene. This elementary reaction mechanism based on two important reaction systems: tert-butyl radical with O2 and allylic isobutenyl radical with O2, plus their subsystems, such as isobutene + HO2, isobutene + OH and allylic isobuteny1hydroxy + O2. Thermochernical kinetic parameters are developed for each elementary reaction and a chemical activation kinetic analysis using quantum RiceRamsperger-Kassel (QRRK) theory for k(E) and modified strong …
Stratospheric Ozone Layer Depletion : A Computer Aided Case Study, James M. Lipuma
Stratospheric Ozone Layer Depletion : A Computer Aided Case Study, James M. Lipuma
Theses
In industries today, there is a desire to stop pollution before it starts, through the process of pollution prevention. Unfortunately, many university level students are not exposed to the thinking process involved in environmental problem solving early enough in their academic career, if they are exposed to it at all. The goal of this thesis is to develop and to evaluate an interdisciplinary case-study about the depletion of the stratospheric ozone layer by chlorofluorocarbons (CFCs). This case-study will be used to teach first year chemistry students about environmental problem solving. The case study was assembled from existing literature according to …
Longevity Of Woodhouse's Toad In Colorado, Richard M. Engeman, E. Marie Engeman
Longevity Of Woodhouse's Toad In Colorado, Richard M. Engeman, E. Marie Engeman
United States Department of Agriculture Wildlife Services: Staff Publications
Little is known about the longevity of amphibians in nature. Records from captive specimens have demonstrated life spans of 10 to 20 yr for a number of anuran species, including 36 yr for Bufo bufo (Duellman WE, Trueb L. 1986. Biology of Amphibians. New York: McGraw-Hill. 670 p). Here, we report on a male Woodhouse's toad (Bufo woodhousii) which appeared in 1978, and has apparently remained since, in a basement window well of a brick home in an unincorporated western suburb of Denver, Colorado (T3S, R69W, 530). In the intervening years no other toads have been observed in …
Termiczna Utylizacja Odpadów W Spalarni "Lobbe" W Dąbrowie Górniczej – Problemy Emisji Zanieczyszczeń, Marian Mazur, Ryszard Januszek, Robert Oleniacz
Termiczna Utylizacja Odpadów W Spalarni "Lobbe" W Dąbrowie Górniczej – Problemy Emisji Zanieczyszczeń, Marian Mazur, Ryszard Januszek, Robert Oleniacz
Robert Oleniacz
The paper presents selected results of comprehensive studies of air quality impact assessment carried out for the „LOBBE” incineration plant in Dąbrowa Górnicza (Poland) in 1995. It focused mainly on air emissions problems. Stack concentrations and emissions of selected air pollutants formed during thermal treatment processes of different kinds of waste materials and incinerators is performed. The study covered both sludge and slime incinerated in a multiple hearth furnace and four example groups of waste materials incinerated in a rotary furnace. The research have helped confirm the levels of air emissions as a function of the type of incinerated waste …
Chronic Effects Of Baseflow Levels Of Atrazine On Platte River Algae, Karen J. Nelson
Chronic Effects Of Baseflow Levels Of Atrazine On Platte River Algae, Karen J. Nelson
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Influence Of Prey Availability On Walleye (Stizostedion Vitreum), Mark T. Porath
Influence Of Prey Availability On Walleye (Stizostedion Vitreum), Mark T. Porath
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Growth And Yield Of Snap Beans (Phaseolus Vulgaris L.) As Affected By Shelterbelts And Planting Dates, Mohd Nazip Suratman
Growth And Yield Of Snap Beans (Phaseolus Vulgaris L.) As Affected By Shelterbelts And Planting Dates, Mohd Nazip Suratman
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Thermal Tolerances Of Platte River Fishes: Field And Laboratory Studies, Brett P. Fessell
Thermal Tolerances Of Platte River Fishes: Field And Laboratory Studies, Brett P. Fessell
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
การเกิดและดับของตลาดน้ำวัดไทร ผลพวงของการเปลี่ยนแปลงที่เกิดจากการพัฒนา, สุจิตรา ชโลดม
การเกิดและดับของตลาดน้ำวัดไทร ผลพวงของการเปลี่ยนแปลงที่เกิดจากการพัฒนา, สุจิตรา ชโลดม
Thai Environment
No abstract provided.
การจัดการอนุรักษ์ธรรมชาติและสิ่งแวดล้อม, ทวีวงศ์ ศรีบุรี
การจัดการอนุรักษ์ธรรมชาติและสิ่งแวดล้อม, ทวีวงศ์ ศรีบุรี
Thai Environment
No abstract provided.
มัจจุราชควันบุหรี่, สิริกร เกรอต