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Articles 72841 - 72870 of 78711
Full-Text Articles in Entire DC Network
The Helioporacean Octocoral Epiphaxum, Recent And Fossil: A Monographic Iconography, Frederick M. Bayer
The Helioporacean Octocoral Epiphaxum, Recent And Fossil: A Monographic Iconography, Frederick M. Bayer
Studies in Tropical Oceanography
No abstract provided.
Partial Characterization Of The Major Lipooligosaccharide From A Strain Of Haemophilus Ducreyi, The Causative Agent Of Chancroid, A Genital Ulcer Disease, William Melaugh, Nancy J. Phillips, A A. Campagnari, R Karalus, B W. Gibson
Partial Characterization Of The Major Lipooligosaccharide From A Strain Of Haemophilus Ducreyi, The Causative Agent Of Chancroid, A Genital Ulcer Disease, William Melaugh, Nancy J. Phillips, A A. Campagnari, R Karalus, B W. Gibson
Chemistry Faculty Publications
The first preliminary structure of a surface lipooligosaccharide from Haemophilus ducreyi has been determined. The major oligosaccharide was released by mild acid hydrolysis and analyzed by liquid secondary ion and tandem mass spectrometry. The mass spectral data combined with composition and methylation analysis yielded the most probable structure; Gal1----4GlcNAc1----3Gal1----4Hep1----6Glc1----( Hep1----2Hep1----)3,4Hep1---- KDO, where the reducing terminal 3-deoxy-D-manno-octulosonic acid (or KDO) exists in an anhydro form. This anhydro species results from the elimination of a phosphate from C-4 of KDO during mild acid hydrolysis. The core heptose trisaccharide consists of L-glycero-D-manno-heptose, but analysis of the peracetylated sugars indicated that the 1,4-linked heptose …
Ectoparasitism As A Cause Of Natal Dispersal In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown
Ectoparasitism As A Cause Of Natal Dispersal In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown
School of Natural Resources: Faculty Publications
Nestling Cliff Swallows (Hirundo pyrrhonota) in southwestern Nebraska that were relatively heavily parasitized by hematophagous fleas (Ceratophyllus celsus) and swallow bugs (Oeciacus vicarius) dispersed to nonnatal colonies to breed the subsequent year, whereas nestlings that were relatively lightly parasitized returned to their natal colony to breed. There were no significant differences between dispersers and nondispersers in natal clutch size, natal brood size, relative hatching date, natal body mass, natal nest's distance from the colony's center, and natal nest's age. There were no sex differences in dispersal tendencies. Dispersing birds tended to move to smaller colonies …
Track Structure Model Of Cell Damage In Space Flight, Robert Katz, Francis A. Cucinotta, John W. Wilson, Judy L. Shinn, Duc M. Ngo
Track Structure Model Of Cell Damage In Space Flight, Robert Katz, Francis A. Cucinotta, John W. Wilson, Judy L. Shinn, Duc M. Ngo
Robert Katz Publications
Cell damage by high linear energy transfer (LET) radiations has been described by a phenomenological model (track theory) for more than 20 years. With track theory, molecules of biological significance (dry enzymes and viruses) act as one-hit detectors. Recent additions to tire class of one-hit detectors arc Escherichia coil B, and single- and double-strand breaks in SV-40 virus in EO buffer, where indirect effects predominate. The response of cells (survival, transformation, and chromosome aberration) to these radiations is typically described by a four-parameter model whose numerical values are determined from the equations of the theory being fit to experimental …
Recreation Use Limits And Allocation On The Lower Deschutes River, Sarah F. Bates, University Of Colorado Boulder. Natural Resources Law Center
Recreation Use Limits And Allocation On The Lower Deschutes River, Sarah F. Bates, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
iii, 73 p. ; 28 cm
Stable Isotope Analysis Using Tunable Diode Laser Spectroscopy, Todd B. Sauke, J. F. Becker, M. Loewenstein
Stable Isotope Analysis Using Tunable Diode Laser Spectroscopy, Todd B. Sauke, J. F. Becker, M. Loewenstein
Faculty Publications
Measurements of ratios of stable isotopes are used in such diverse fields as petroleum prospecting, medical diagnostics, and planetary exploration. The narrow emission linewidth available from tunable diode lasers permits high-resolution infrared absorption measurements of closely spaced isotopic rovibrational lines. Our dual beam spectrometer uses the sweep integration technique in a spectral region where adjacent spectral lines are of approximately equal absorbance at the expected isotopic abundances. The experimental results reported here indicate that isotopic ratios of carbon in carbon dioxide can be measured to an accuracy of better than 0.4%. This laser spectroscopic spectrometric technique offers an alternative to …
Water Quality In Minnesota
Journal of the Minnesota Academy of Science
Abstracts of articles on water quality in Minnesota.
Science Research
Journal of the Minnesota Academy of Science
Abstracts of articles on science research, including articles on biology, botany, computer/engineering, Earth science, ecology, microbiology, and physics.
Dolores River Basin Water Quality Study, Department Of Interior; Bureau Of Reclamation, Technical Service Center; Denver, Co
Dolores River Basin Water Quality Study, Department Of Interior; Bureau Of Reclamation, Technical Service Center; Denver, Co
Elusive Documents
No abstract provided.
America's Waters: A New Era Of Sustainability: Report Of The Long's Peak Working Group On National Water Policy, David H. Getches, Lawrence J. Macdonnell, Charles F. Wilkinson, Long's Peak Working Group On National Water Policy, University Of Colorado Boulder. Natural Resources Law Center
America's Waters: A New Era Of Sustainability: Report Of The Long's Peak Working Group On National Water Policy, David H. Getches, Lawrence J. Macdonnell, Charles F. Wilkinson, Long's Peak Working Group On National Water Policy, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
12 p. ; 28 cm
The Western Public Lands: An Introduction, Sarah F. Bates, University Of Colorado Boulder. Western Lands Program, University Of Colorado Boulder. Natural Resources Law Center
The Western Public Lands: An Introduction, Sarah F. Bates, University Of Colorado Boulder. Western Lands Program, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
72 p. : ill., maps ; 28 cm
Restoring Endangered Ecosystems: The Truckee-Carson Water Rights Settlement, David Yardas, University Of Colorado Boulder. Natural Resources Law Center
Restoring Endangered Ecosystems: The Truckee-Carson Water Rights Settlement, David Yardas, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
12 p. : map ; 28 cm
Floristic Composition And Conservation Status Of Fens In Iowa, John A. Pearson, Mark J. Leoschke
Floristic Composition And Conservation Status Of Fens In Iowa, John A. Pearson, Mark J. Leoschke
Journal of the Iowa Academy of Science: JIAS
Over 200 extant fens of varying condition were documented during an extensive inventory conducted in Iowa between 1986 and 1991. Approximately half of the extant fens support endangered, threatened, special concern, or other rare plant species. Approximately 25 fens are outstanding conservation prospects with intact vegetation, high species richness, and rare species. Nearly 40% of all potential fen sites have been destroyed by cultivation or damage; another 30% remain unknown due to lack of a field visit, but most appear on aerial photographs to be very small, disturbed fragments. In addition to their traditionally recognized range in northwest Iowa, fens …
Contributions To Sustainable Development From The Legal Community: Opportunity For International Cooperation, Rodrigo Barahona, University Of Colorado Boulder. Natural Resources Law Center
Contributions To Sustainable Development From The Legal Community: Opportunity For International Cooperation, Rodrigo Barahona, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
9 p. ; 28 cm
Fact Sheet No.1: Nonpoint Source Pollution And Water Quality Of Northwest Arkansas, T. C. Daniel, D. R. Edwards, D. C. Wolf, K. F. Steele, M. J. Cochran
Fact Sheet No.1: Nonpoint Source Pollution And Water Quality Of Northwest Arkansas, T. C. Daniel, D. R. Edwards, D. C. Wolf, K. F. Steele, M. J. Cochran
Arkansas Water Resources Center Technical Reports
Preservation of a clean, safe, and biologically diverse environment can capture public attention as few other issues can. Indeed, recent international cooperative efforts indicate that there is an increasing global desire to pass on to future generations an environment at least equal in quality to the one we inherited.
Resource Law Notes Newsletter, No. 24, Jan. 1992, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes Newsletter, No. 24, Jan. 1992, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)
No abstract provided.
Mitigation Banking: A Potential Tool For Port Planners, Laura Kelley
Mitigation Banking: A Potential Tool For Port Planners, Laura Kelley
Marine Affairs Theses and Major Papers
Mitigation banking has been used as a means of facilitating the permit process by removing the negotiation of appropriate mitigation for development from the confines of the permit process. A developer with frequent needs to mitigate for losses associated with Section 404 and Section 10 requirements may, using a mitigation bank, consolidate mitigation and in so doing, potentially reduce mitigation costs. As a result of route maintenance, as well as expansion requirements, ports were considered to be good candidates for sponsoring mitigation bank efforts. Port use of mitigation banking has not been as expected due to a lack of available …
Sea-Surface Temperature Related Fisheries And Resource Markets, Jeffrey Michael Rasinski
Sea-Surface Temperature Related Fisheries And Resource Markets, Jeffrey Michael Rasinski
Marine Affairs Theses and Major Papers
This thesis addresses the potential application of sea-surface temperature (SST) data to economic resource markets. It considers the revolution in technology and the accessibility of timely, accurate SST observations for resource markets. Specifically, it addresses issues related to pelagic fisheries and the fish meal industry. The thesis presents a discussion and overview of the upwelling ecosystem of Peru and the Peruvian anchovy (Engraulis ringens) including quantitative analysis and forecasts for the fishery and fish meal prices. This analysis is used to demonstrate the commercial application and relationship between SST and related resource markets. The thesis establishes a bioeconomic statistical model …
The Potential Loss Of Coastal Open Space Due To The Utilization Of Privately Owned Wastewater Treatment Facilities: A Case Study In Gloucester, Massachusetts, Eric W. Hutchins
The Potential Loss Of Coastal Open Space Due To The Utilization Of Privately Owned Wastewater Treatment Facilities: A Case Study In Gloucester, Massachusetts, Eric W. Hutchins
Marine Affairs Theses and Major Papers
The impact of privately owned sewage treatment plants, a viable alternative to on-site septic systems, is examined in regards to future land-use patterns. It was hypothesized that the use of these facilities would lead to a greater loss of open space, in the coastal City of Gloucester, Massachusetts, than if only conventional on-site septic systems were to be permitted. Constraints to development such as zoning, wetlands, soil characteristics, parcel size, and economic viability were applied to undeveloped property in Gloucester. The results were used to identify individual parcels and calculate the respective developability based on the two different scenarios. Only …
Problems Of Fisheries Management On The Patagonian Shelf: A Decade After The 1982 Falklands (Malvinas) Conflict, Gustavo A. Bisbal
Problems Of Fisheries Management On The Patagonian Shelf: A Decade After The 1982 Falklands (Malvinas) Conflict, Gustavo A. Bisbal
Marine Affairs Theses and Major Papers
The armed conflict between Argentina and Britain over the Falkland Islands (Islas Malvinas) early in 1982, resulted in a confusing partition of the maritime area around these islands. The military strategies and policies developed by both countries during and after the war created an unclear situation regarding limits and jurisdictions, thus delaying managerial actions and regulation enforcement over the fishing resources of the area. Several foreign fishing fleets operating in the region at the time, took advantage of the lack of protective legislation and recognized authority, resulting in overfishing of species such as squid and hake. No significant control was …
Rhode Island Marine Debris Pilot Project, Christina L. Beal
Rhode Island Marine Debris Pilot Project, Christina L. Beal
Marine Affairs Theses and Major Papers
The Rhode Island Marine Debris Pilot Project was initiated in Newport, R.I. during the summer of 1991. The objective of the project was to decrease recreational boaters' contribution to marine debris. Two methods were used to achieve this goal. First, trash and recycling disposal facilities were increased around the harbor. Secondly, educational literature on the environmental consequences of marine debris, and the law that applies to overboard disposal, were distributed throughout the local marine community. The implementation of the pilot project led to a significant increase in the amount of debris brought ashore by boaters, and a decrease in the …
Fractal (Reconstructive Analogue) Memory, David J. Stucki, Jordan B. Pollack
Fractal (Reconstructive Analogue) Memory, David J. Stucki, Jordan B. Pollack
Mathematics Faculty Scholarship
This paper proposes a new approach to mental imagery that has the potential for resolving an old debate. We show that the methods by which fractals emerge from dynamical systems provide a natural computational framework for the relationship between the “deep” representations of long-term visual memory and the “surface” representations of the visual array, a distinction which was proposed by (Kosslyn, 1980). The concept of an iterated function system (IFS) as a highly compressed representation for a complex topological set of points in a metric space (Barnsley, 1988) is embedded in a connectionist model for mental imagery tasks. Two advantages …
University Of Texas At Tyler Catalog, 1992-1994, University Of Texas At Tyler
University Of Texas At Tyler Catalog, 1992-1994, University Of Texas At Tyler
Catalogs
Archives Space instance: https://archivesspace.uttyler.edu/repositories/2/archival_objects/22366
Developing A Guidebook For An Outdoor Classroom, David D. Martell
Developing A Guidebook For An Outdoor Classroom, David D. Martell
Theses Digitization Project
Field guide -- Map -- Nature trail plant species -- Plant identification key -- Species test plot -- Climate -- Cloud identification -- Desert soils -- Tortoise station -- Animal track and pond.
Ua56/1 Fact Book, Wku Institutional Research
Ua56/1 Fact Book, Wku Institutional Research
WKU Administration Documents
Statistical and demographic profile of WKU.
Naturescope Workshop Handbook For Facilitators, Sotera Madison
Naturescope Workshop Handbook For Facilitators, Sotera Madison
Theses Digitization Project
A guide for the training of presenters of the NatureScope series -- Correlations between California's Science Framework..., NatureScope, Project WILD, Project WILD Aquatic, & Project Learning Tree.
Fire In A Riparian Shrub Community: Postburn Water Relations In The Tamarix-Salix Association Along The Lower Colorado River, S. D. Smith, D. E. Busch
Fire In A Riparian Shrub Community: Postburn Water Relations In The Tamarix-Salix Association Along The Lower Colorado River, S. D. Smith, D. E. Busch
Life Sciences Faculty Research
Higher water potentials in recovering burned salt-cedar (Tamarix ramosissima) relative to unburned plants and the opposite situation in willow (Salix gooddingii) provide evidence that postfire water stress is reduced in the former but not the latter. Similarly, diurnal patterns of stomatal conductance in these taxa are consistent with the existence of more vigor in burned salt-cedar than willow. Plots of water potential and transpiration demonstrate that hydraulic efficiencies may contribute to differences in fire recovery.
Characterization And Implementation Of A Continuos Flow Trace Metal Preconcentration System For Inductively Couples Plasma Atomic Emission Spectrometry, Robert N. Sibley
Characterization And Implementation Of A Continuos Flow Trace Metal Preconcentration System For Inductively Couples Plasma Atomic Emission Spectrometry, Robert N. Sibley
Senior Scholar Papers
A continuous flow pre-concentration system for analysis of trace metals in natural waters was characterized and used to determine the copper(II) and lead(II) concentrations in seawater from Penobscot Bay, Maine. Pre-concentrated samples were analyzed by inductively coupled plasma atomic emission spectrometry (ICP-AES). System characterization involved elucidation of the thermodynamic complexation constants, KCu(II) and KPb(II), for Cu(II) and Pb(II) with the pre-concentration column chromatographic material. This was done in aqueous media of known pH and ionic strength. The column contained 8-hydroxyquinoline immobilized on Toyopearl HW-75 fractogel chromatographic resin. The buffer system used for metal binding experiments was an equimolar mixture of …
An Analysis Of The Pattee Pond Watershed In Relation To Lake Water Quality, Problems In Environmental Science Course (Biology 493), Colby College, Water Organization For Mending Yesterday's Nature, Colby College, Student Land Use Group Study, Colby College
An Analysis Of The Pattee Pond Watershed In Relation To Lake Water Quality, Problems In Environmental Science Course (Biology 493), Colby College, Water Organization For Mending Yesterday's Nature, Colby College, Student Land Use Group Study, Colby College
Colby College Watershed Study: Pattee Pond (2008, 1992)
The purpose of this study was to analyze the water quality of Pattee Pond and to determine the factors that influence it. The study was divided into two major portions: 1) an assessment of land use practices that influence the water quality of the pond, and 2) an assessment of actual water quality of the pond and its tributaries. The investigation of the land use practices in the Pattee Pond watershed focused on determining the extent to which humans influence the water quality of the lake. Water from Pattee Pond and its tributaries was sampled and analyzed in the second …
Water Quality In The Kentucky River Basin, Daniel I. Carey
Water Quality In The Kentucky River Basin, Daniel I. Carey
Information Circular--KGS
Data gathered up to 1990 suggest that water pollution problems existed throughout the Kentucky River Basin. Fecal coliform bacteria in streams was a widespread problem because of the inadequate treatment of municipal wastes, failing septic systems, and agricultural runoff. Iron, lead, manganese, mercury, and silver exceeded State standards and Federal guidelines for drinking water and aquatic life at most of the sample sites for a majority of samples. Aquatic life in many smaller streams in the Knobs region was reduced by chloride discharges from oil and gas operations, according to the Kentucky Division of Water. Organic enrichment and high nutrient …