Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 58111 - 58140 of 65320

Full-Text Articles in Entire DC Network

Ultraviolet-B Radiation: Effects On Pollen Of 34 Taxa, And Inheritance Patterns And Carryover Of Radiation Response In Arabidopsis, Javad Torabinejad May 1999

Ultraviolet-B Radiation: Effects On Pollen Of 34 Taxa, And Inheritance Patterns And Carryover Of Radiation Response In Arabidopsis, Javad Torabinejad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although considerable research has addressed effects of elevated ultraviolet-B (UV-8) radiation on vegetative plant structures and processes, the reproductive biology and patterns of inheritance of UV-B tolerance have received much less attention. I examined the effects of UV-B radiation on pollen of 34 taxa. I also addressed questions concerning the patterns of inheritance of UV-B tolerance in Arabidopsis thaliana and examined potential cumulative carryover effects of UV-B exposure through multiple generations of this species.

In the first study, a significant reduction in pollen germination occurred in only five species, but pollen tube growth in more than half of the species …


Management Of Emissions At Abu Dhabi Gas Liquefaction Company, Abdul Aziz R Al Nuaimi May 1999

Management Of Emissions At Abu Dhabi Gas Liquefaction Company, Abdul Aziz R Al Nuaimi

Theses

Gas industries in the United Arab Emirates are vastly growing in order to mainly cope with the increasing demand for energy productions as well as for the wise utilization of gas associate with the crude oil. Environmental problems coupled with gas employment necessitates the development of a management techniques that can lead to better control of emissions from gas processing companies since some of these emissions are unavoidable for safety reasons.

This study suggests a framework to be used to control emissions from Abu Dhabi Gas Liquefaction Company (ADGAS) in Das Island, which represents a typical major gas processing company …


A Social Analysis Of Grazing Management On National Forest Lands: A Case Study In Catron County, New Mexico, Alexis S. Watts May 1999

A Social Analysis Of Grazing Management On National Forest Lands: A Case Study In Catron County, New Mexico, Alexis S. Watts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The rural west in this country faces increased national pressure concerning the management of natural resources on public lands. Issues regarding natural resource management are becoming more important as they continue to affect rural communities and capture the attention of a variety of interest groups. Natural resource managers are increasingly required to consider social dimensions of resource use and management. Lack of consideration in these areas can lead to dissatisfied, and even hostile, local residents and interest groups. Often land managers face criticism from many groups at once as a result of management decisions.

This study analyzed a particular resource …


Proceedings Of The 1999 Onr Decision-Support Workshop Series: A Decision-Making Tools Workshop, Collaborative Agent Design Research Center Apr 1999

Proceedings Of The 1999 Onr Decision-Support Workshop Series: A Decision-Making Tools Workshop, Collaborative Agent Design Research Center

Collaborative Agent Design (CAD) Research Center

The rationale of the Workshop rests on some very simple observations. It is well known that every situation encountered by individuals and organizations demands an appropriate response. The choice of such a response from among a multitude of options is the decision-making process. Simple situations that give rise to a small number of options allow the decision maker to decide on a course of action without great effort. This state of affairs changes dramatically when the situations are complex and involve a large number of factors. In this case, an extensive field of options is engendered that makes it impossible …


Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 1, Thomas Alge Apr 1999

Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 1, Thomas Alge

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

In worldwide aviation operations, bird collisions with aircraft and ingestions into engine inlets present safety hazards and financial loss through equipment damage, loss of service and disruption to operations. The problem is encountered by all types of aircraft, both military and commercial. Modern aircraft engines have achieved a high level of reliability while manufacturers and users continually strive to further improve the safety record. A major safety concern today includes common-cause events which involve significant power loss on more than one engine. These are externally-inflicted occurrences, with the most frequent being encounters with flocks of birds. Most frequently these encounters …


Defective Interleukin (Il)-18-Mediated Natural Killer And T Helper Cell Type 1 Responses In Il-1 Receptor-Associated Kinase (Irak)-Deficient Mice, Palanisamy Kanakaraj, Karen Ngo, Ying Wu, Ana Angulo, Peter Ghazal, Crafford A. Harris, John Siekierka, Per A. Peterson, Wai Ping Fung-Leung Apr 1999

Defective Interleukin (Il)-18-Mediated Natural Killer And T Helper Cell Type 1 Responses In Il-1 Receptor-Associated Kinase (Irak)-Deficient Mice, Palanisamy Kanakaraj, Karen Ngo, Ying Wu, Ana Angulo, Peter Ghazal, Crafford A. Harris, John Siekierka, Per A. Peterson, Wai Ping Fung-Leung

Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works

Interleukin (IL)-18 is functionally similar to IL-12 in mediating T helper cell type 1 (Th1) response and natural killer (NK) cell activity but is related to IL-1 in protein structure and signaling, including recruitment of IL-1 receptor-associated kinase (IRAK) to the receptor and activation of c-Jun NH2-terminal kinase (JNK) and nuclear factor (NF)-κB. The role of IRAK in IL-18-induced responses was studied in IRAK-deficient mice. Significant defects in JNK induction and partial impairment in NF-κB activation were found in IRAK-deficient Th1 cells, resulting in a dramatic decrease in interferon (IFN)-γ mRNA expression. In vivo Th1 response to Propionibacterium aches and …


Resource Law Notes Newsletter, No. 46, Spring Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center Apr 1999

Resource Law Notes Newsletter, No. 46, Spring Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


Water Current, Volume 31, No. 2, April 1999 Apr 1999

Water Current, Volume 31, No. 2, April 1999

Water Current Newsletter

Defining Visions of Nebraska's Water Future
From the Director
Jess, Harnsberger, "Nebraska Plan" Team Honored as Water Stewards at Kearney
University of Nebraska Hires Jess
Nebraska Forestry Shortcourse
Managing Pesticides to Minimize Risk
Water News Brief
Free Drinking Water Week Packets
AWWA Announces Research Project Funds
TGF Memberships
Nebraska Water Tour


Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)-- Part 2, Thomas Alge Apr 1999

Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)-- Part 2, Thomas Alge

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

Although the perceived threat from the growing geese population in North America has been increasing in recent years (and needs to be addressed), progress appears to have been made in reducing the damaging bird strikes through improved awareness and more effective airport bird hazard control programs worldwide. The following statistics attempt to quantify this progress for selected geographic regions. Reasons for the improvements and lessons learned, if known, are mentioned.


Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 3, Thomas Alge Apr 1999

Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 3, Thomas Alge

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

This paper focuses on the increasing threat to aircraft and engines posed by the recorded growth in geese populations in North America. Service data show that goose strikes to aircraft and engines are increasing, especially in North America - consistent with the growing resident geese populations estimated by the USDA. Airport managers, along with the governmental authorities, need to develop a strategy to address this large flocking bird issue. This paper also presents statistics on the overall status of the bird threat for birds of all sizes in North America relative to other geographic regions. Overall, the data show that …


Evolution Of The Dfw International Airport Wildlife Management Program –- Lessons Learned, Curt W. Kuehner, John R. Alexander Apr 1999

Evolution Of The Dfw International Airport Wildlife Management Program –- Lessons Learned, Curt W. Kuehner, John R. Alexander

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

On January 7, 1997, Dallas-Fort Worth International Airport experienced its first large bird strike event, involving the collision of over 350 European starlings with an American Airlines MD-80. This prompted a serious assessment of existing wildlife control procedures, and eventually resulted in the formation of the DFW Wildlife Control Program. The number of reported strikes has dropped from 157 in 1996 to 52 in 1998. The success of DFW’s program is the result of long, hard hours and extensive trial and error. However, wildlife management personnel at other airfields do not have to go through all the growing pains and …


Bird Proofing Hangars, Carl Lahser, Will Summers Apr 1999

Bird Proofing Hangars, Carl Lahser, Will Summers

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

Birds can damage flight line structures and create serious health and safety risks for workers. Many of our structures are old and not designed as bird proof. Many controllable factors are discussed but the underlying principles are to deny birds food, water and access to resting/nesting areas. Various "tools" are discussed including grounds and building maintenance, landscaping, personnel management, chemical deterrents, poisons, and shooting or trapping.


Scwds Briefs: Volume 15, Number 1 (April 1999) Apr 1999

Scwds Briefs: Volume 15, Number 1 (April 1999)

Southeastern Cooperative Wildlife Disease Study: Publications

SCWDS BRIEFS
April 1999
Aflatoxicosis in Louisiana Geese
Aflatoxins
Aspergillus
Prevention of Meningeal Worm Infection
Meningeal worm (Parelaphostrongylus tenuis)
Meningeal worm infection (parelaphostrongylosis)
Meningeal Worms in Cattle
Deer meningeal worm (Parelaphostrongylus tenuis) and clinical disease (parelaphostrongylosis)
Composted Chicken Litter Safer for Wildlife
Histomoniasis (blackhead disease) transmission
Pasteurella multocida
Infectious bursal disease (Gumboro) and Newcastle disease
Hazards of Deer Relocation
Missouri Department of Conservation (MDC)
Capture myopathy
Rodenticide Hazards to Wildlife
Bromadiolone and diphacinone
Anticoagulant compounds
National Wild Turkey Federation (NWTF)
Avian pox and blackhead disease
Annual Conference of the Wildlife Disease
Association (WDA)


The Probe, Issue 199 – April 1999 Apr 1999

The Probe, Issue 199 – April 1999

The Probe: Newsletter of the National Animal Damage Control Association

American White Pelicans: The latest avian problem for southeastern catfish producers -- D. Tommy King, USDAIAPHISIWS, National Wildlife Research Center, Mississippi Research Station, Mississippi State University, MS 39762
In Memoriam: William D. Fitzwater (1917-1999)
In Memoriam: Jack H. Berryman
Booklet Review: "Managing Canada Geese in Urban Environments: A Technical Guide" by Arthur E. Smith, Scott R. Craven and Paul D. Curtis (1999). Jack Berryman Institute Publication 16, and Cornell University Cooperative Extension, Ithaca, NY. 42 pages. $10.00 (postpaid)
Video Review: "Suburban Goose Management: Searching for Balance." Produced by the Educational Television Center Media and Technology Services, Cornell University. (1998) VHS. …


Aluminum And Phosphorus Separation: Application To Preparation Of Target From Brain Tissue For 26Al Determination By Accelerator Mass Spectrometry, Russell D. Brauer, J. David Robertson, Pankaj Sharma, Robert A. Yokel Apr 1999

Aluminum And Phosphorus Separation: Application To Preparation Of Target From Brain Tissue For 26Al Determination By Accelerator Mass Spectrometry, Russell D. Brauer, J. David Robertson, Pankaj Sharma, Robert A. Yokel

Pharmaceutical Sciences Faculty Publications

Acid digested brain containing 4 mg added 27Al was ashed at 1000°C to prepare an Al2O3 target for accelerator mass spectrometry (AMS) analysis of 26Al. A glass-like material usually resulted which was thought to be aluminum (Al) oxyphosphate. The separation of Al and phosphate was investigated. Al, but not phosphate, was bound by a cation exchange resin (AG 50-X8). Hydrofluoric acid eluted the Al from the resin. Removal of phosphate from acid digested brain by this method produced an amorphous material after ashing that was easier to recover from the porcelain crucible and had a …


Golf Courses In Southern Nevada Will Significantly Impact The Water Management Efforts By Using Recycled Water Rather Than Potable Water To Irrigate Their Turf, Sean D. Ainsworth Apr 1999

Golf Courses In Southern Nevada Will Significantly Impact The Water Management Efforts By Using Recycled Water Rather Than Potable Water To Irrigate Their Turf, Sean D. Ainsworth

UNLV Theses, Dissertations, Professional Papers, and Capstones

As the number of people continually move to the Las Vegas Valley and take up residence, the possibility of "running out of water" can become a reality. Having large water users (i.e. golf courses) irrigate their turf with recycled water, they will significantly impact the water management efforts in the Las Vegas Valley. When each course is irrigating their turf with recycled water, this will help ease the drinking water demand in the valley, especially during the peak demand season (summer).


Rio Natural Gas, The Alternative Fuel Of The Future, Peter Garner Apr 1999

Rio Natural Gas, The Alternative Fuel Of The Future, Peter Garner

UNLV Theses, Dissertations, Professional Papers, and Capstones

Automobile exhaust is a major contributor of harmful air pollutants. Exhaust emissions include water (H2O), carbon dioxide (CO2), carbon monoxide (CO), nitrous oxides (NOX), sulfur oxides (SOX), hydrocarbons (HC), and particulate matter (PM), and of these the four major air pollutants are CO, HC, NOX, and PM. Particulate matter is predominantly emitted from diesel fuel burning vehicles. In order to aid in reduction of air pollution, and reduce dependence on foreign oil imports, federal legislation has been enacted. The two prominent acts are the National Energy Security Act in 1992, which mandates use of alternative fuels, and the Clean Air …


Benthic Community Analysis Of Hog Island Bay, Virginia, David James Lewis Apr 1999

Benthic Community Analysis Of Hog Island Bay, Virginia, David James Lewis

Biological Sciences Theses & Dissertations

The benthic infaunal macroinvertebrate communities of Hog Island Bay of the Virginia Eastern Shore were quantitatively sampled at 30 locations on August 31 and September 1, 1995. The primary objectives of this study were: (1) to characterize the subtidal macroinfaunal benthic communities of Hog Island Bay, (2) to examine relationships between abiotic factors and the macroinfaunal communities and (3) to characterize the environmental condition of the system using the Benthic Index of Biotic Integrity (B-IBI) (Weisburg et al. 1997) and the EMAP Benthic Index for the Virginian Province (Strobel et al. 1995).

The ecological condition of Hog Island Bay appears …


Characterization And Identification Of A Sludge-Associated Bacterial Isolate, Abiodun O. Adibi, Derrell Mcpherson, Minna Laine Apr 1999

Characterization And Identification Of A Sludge-Associated Bacterial Isolate, Abiodun O. Adibi, Derrell Mcpherson, Minna Laine

Virginia Journal of Science

During a metal speciation study, an unusually high retention of lead ·was observed when lead solution was percolated through a column packed with sludge compost obtained from Hampton Roads Sanitation department. A bacterium was isolated from the sludge compost and identified as Bacillus sphaericus using electron microscopy, whole cell fatty acid analysis (Midi System) and Biolog GP Microplate. The isolate grows in broth and agar media containing up to 800 µM lead. Lead accumulation study using atomic absorption spectrophotometer indicates that the isolate adsorbs lead. Lead adsorption is pH dependent. The isolate contains a plasmid of approximately 40 -50 kbp …


Effects Of Organic Matter And Iron-Rich Clay On Mobility Of Trace Metals From Flue Dust Contaminated Soil, Scott Ephraim Lewis Apr 1999

Effects Of Organic Matter And Iron-Rich Clay On Mobility Of Trace Metals From Flue Dust Contaminated Soil, Scott Ephraim Lewis

OES Theses and Dissertations

The enhanced leaching of trace metals through soil becomes a concern for human health if dissolved trace metals reach groundwater and migrate into a public water system. A serial batch extraction procedure was implemented to determine the effects of Vitagrow © organic matter and Fe-Rich TM clay on the mobility of trace metals (Zn, Pb, and Cd) from a flue dust treated (0, 600, 1200, and 2400 μgig Zn) Appling soil.

The addition of an organic matter (OM) amendment to the Appling soil enhanced Pb mobility and reduced soluble Zn and Cd. In general, average solution concentrations of trace metals …


An Overview Of The Biology Of The Brown Treesnake* (Boiga Irregularis), A Costly Introduced Pest On Pacific Islands, Gordon H. Rodda, Thomas H. Fritts, Michael J. Mccoid, Earl W. Campbell Iii Apr 1999

An Overview Of The Biology Of The Brown Treesnake* (Boiga Irregularis), A Costly Introduced Pest On Pacific Islands, Gordon H. Rodda, Thomas H. Fritts, Michael J. Mccoid, Earl W. Campbell Iii

United States Department of Agriculture Wildlife Services: Staff Publications

The 20-30 species of the genus Boiga (Colubridae, Boiginae) range from tropical Africa through southern Asia to Melanesia and Australia (Leviton, 1968). Collectively, they are known as catsnakes, mangrove snakes, or treesnakes (Obst et al., 1988; Greene, 1989). The common name "catsnakes" is sometimes used for snakes in the genus Telescopus as well (Obst et 1, 1988).

Members of the genus Boiga are nocturnal, oviparous, opisthoglyphic, euryphagic, and slender; they have vertical elliptical pupils (thus “cat” snakes) set in large eyes, and short, blunt heads that are noticeably larger than their necks. With one exception they are arboreal or semiarboreal …


Fiber-Optic Coupled Lidar Receiver System To Measure Stratospheric Ozone, David Brent Harper Apr 1999

Fiber-Optic Coupled Lidar Receiver System To Measure Stratospheric Ozone, David Brent Harper

Electrical & Computer Engineering Theses & Dissertations

A fiber-optic coupled lidar receiver system was constructed to determine ozone concentrations in the stratosphere. The system was used to make ground-based measurements of lidar returns from a UV DIAL system. A fiber-optic cable was used to couple the light from the receiver telescope to the light detector. Photon counting was implemented as the light detection technique. This technique allowed detection of 301 and 311 nm lidar returns up to 27.5 and 32.5 km respectively. A software application was developed to control the photon counting system and perform real-time data analysis of measured lidar returns. DIAL measurements of stratospheric ozone …


Results Of The City Of Tampa Surface Water Compliance Monitoring Program For The Year 1998 And Examination Of Long-Term Water Quality And Biological Indicator Trends In Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers Mar 1999

Results Of The City Of Tampa Surface Water Compliance Monitoring Program For The Year 1998 And Examination Of Long-Term Water Quality And Biological Indicator Trends In Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers

Reports

This report is submitted to Florida Department of Environmental Regulation (FDER) to satisfy the requirements set forth in specific condition No. 14 of Hookers Point WWTP permit No. D029-184532B. The report is based on data obtained by the City of Tampa (COT) compliance water quality monitoring program approved under construction permit DC29-152799 and the report also includes examination of long-term trends for water quality parameters and biological indicators collected by the City of Tampa Bay Study Group and the Environmental Protection Commission of Hillsborough County (EPC).


Candidate Repellents, Oral And Dermal Toxicants, And Fumigants For Brown Treesnake Control, Peter J. Savarie, Richard L. Bruggers Mar 1999

Candidate Repellents, Oral And Dermal Toxicants, And Fumigants For Brown Treesnake Control, Peter J. Savarie, Richard L. Bruggers

United States Department of Agriculture Wildlife Services: Staff Publications

The information presented in this chapter was obtained primarily from two computerized literature searches conducted on the Dialog System (Dialog Information Services, Inc.; Palo Alto, Calif.), which covers a wide variety of topics including medicine, environmental sciences, agriculture, and biology. The key word in the first search was the scientific name of the Brown Treesnake, Boiga irregularis. The key words in the second search were repellent, fumigant, toxicant, or control (or any variations of these words) together with the word snake or snakes. In contrast to the research and development of vertebrate pest control agents for rodents …


Letter To The Faa Regarding Modified Standards For Bird Strike Impacts, Paul F. Eschenfelder Mar 1999

Letter To The Faa Regarding Modified Standards For Bird Strike Impacts, Paul F. Eschenfelder

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

The Air Line Pilots Association (ALPA), representing the safety interests of 53,000 professional airline pilots flying for 51 airlines in the United States and Canada, has reviewed the notice of proposed rulemaking (NPRM) in the referenced docket. The NPRM proposes modified standards to which engines are certified with respect to their ability to withstand impacts from birds or similar wildlife hazards. We feel the proposed standard is a step in the right direction, but cannot under any circumstances be considered attainment of a goal. As outlined below, the data used in developing the NPRM has been superseded by more accurate …


Methods For The Diagnosis Of Acute 3-Chloro-P-Toluidine Hydrochloride Poisoning In Birds And The Estimation Of Secondary Hazards To Wildlife, John J. Johnston, Daniel B. Hurlbut, Michael L. Avery, Jack C. Rhyan Mar 1999

Methods For The Diagnosis Of Acute 3-Chloro-P-Toluidine Hydrochloride Poisoning In Birds And The Estimation Of Secondary Hazards To Wildlife, John J. Johnston, Daniel B. Hurlbut, Michael L. Avery, Jack C. Rhyan

United States Department of Agriculture Wildlife Services: Staff Publications

Female boat-tailed grackles poisoned with 3-chloro-p-toluidine hydrochloride (CPTH) were analyzed by necropsy and gas chromatography–mass spectrometry (GC-MS). The necropsies identified the presence of a white precipitate in the pericardium, which had been previously reported as a characteristic of CPTH-exposed birds. The GC-MS method, which utilized deuterated CPTH as a surrogate, quantified CPTH residues in the breast tissue and gastrointestinal tract of CPTH-exposed birds. Comparison of these techniques indicated that the GC-MS method was more accurate for assessing CPTH poisoning in birds. Regression analyses of consumption versus residue data indicated that the sum of breast and gastrointestinal residues can …


United States Patent: Naturally-Odoriferous Animal Repellent, James Russell Mason, Richard Albert Dolbeer, George Preti Mar 1999

United States Patent: Naturally-Odoriferous Animal Repellent, James Russell Mason, Richard Albert Dolbeer, George Preti

United States Department of Agriculture Wildlife Services: Staff Publications

Certain volatile compounds naturally present in herring gull eggs are effective for repelling animals and birds, particularly canids, from the locus to which such compounds are applied. More particularly, the volatile compounds which are effective animal repellents include compounds exhibiting mint-like odors such as the compounds pulegone and piperitone. The invention relates to methods of using these compounds to repel animals, and to repellent compositions comprising effective repellent amounts of such compounds.


The Classroom Encounter, Reuben Hersh Mar 1999

The Classroom Encounter, Reuben Hersh

Humanistic Mathematics Network Journal

No abstract provided.


The Moral Significance Of Indetectable Effects, Sven Ove Hansson Mar 1999

The Moral Significance Of Indetectable Effects, Sven Ove Hansson

RISK: Health, Safety & Environment (1990-2002)

A reassessment of Parfit's fifth "mistake in moral mathematics."


Table Of Contents Volume 10, Number Two, Spring 1999, Risk Editorial Board Mar 1999

Table Of Contents Volume 10, Number Two, Spring 1999, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)