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Articles 39991 - 40020 of 40856
Full-Text Articles in Entire DC Network
Environmental Quality 1979 - Hillsborough County Florida, Hillsborough County Environmental Protection Commission
Environmental Quality 1979 - Hillsborough County Florida, Hillsborough County Environmental Protection Commission
Reports
During 1979 at least 65,948 air quality samples were collected and analyzed from 146 sampling stations throughout Hillsborough County. Enclosed maps attempt to depict the cleaner and dirtier areas of Hillsborough County, while data summaries show where and how often air quality standards were exceeded during 1979.
During 1979, 54 salt water sampling stations were monitored for 40 parameters resulting in 25,151 samples; while 24 fresh water stations were monitored for 53 parameters resulting in 7,588 samples. Sampling averages for each parameter were ranked from lowest to highest (1-54), with the similar rankings assigned to tied average parameters. Lowest ranking …
The Probe, Issue 7 - July 1980
The Probe, Issue 7 - July 1980
The Probe: Newsletter of the National Animal Damage Control Association
Contents: Bureau of Land Management (BLM) land in Alaska burro removal frormBandelier National Monument (New Mexico)and Grand Canyon National Park (Arizona) toxicants to alleviate blackbird problems in Kentucky DMCT, a presumably nontoxic fluorescent tooth and bone marking agent PYTHONS TO GET GRIP ON ADC PROBLEM lion killed 16 registered angora billies MINORS MAKE MAJOR DECISION Exotic parakeets VERTEBRATE PEST CONFERENCE PROCEEDINGS MEETINGS OF INTEREST NEW ADC PATCH NEEDED? William D. Fitzwater
A Comparative Study On The Frequency Of Respiratory, Gastrointestinal, And Allergic Disorders Between Bottle-Fed And Breast-Fed Infants From Birth To Twelve Weeks Of Age, Sylvia C. Souza
Loma Linda University Electronic Theses, Dissertations & Projects
Questions concerning the advantages of breast-feeding have been debated since the introduction of commercially-prepared formula about 50 years ago. Some recognized benefits of breast milk include less respiratory as well as other Infections, less allergy in infancy and later life, and a lower morbidity rate in less-developed countries. From 1955 to 1971 in the United States there was a decline in the incidence of breast feeding related to several factors which included the introduction of formula, mothers returning to the work force, and strict maternity units' rules and routines. Since 1971 to the present there has been a resurgence in …
The Effects Of Elevated Calcium Chloride And Magnesium Chloride Levels On Larval Growth And Survival Of Macrobrachium Rosenbergii (De Man) (Decapoda Palaemonidae) Reared In The Laboratory, James Thomas Michaels Ii
The Effects Of Elevated Calcium Chloride And Magnesium Chloride Levels On Larval Growth And Survival Of Macrobrachium Rosenbergii (De Man) (Decapoda Palaemonidae) Reared In The Laboratory, James Thomas Michaels Ii
OES Theses and Dissertations
The effects of elevated CaCl2 , MgCl2 , combination CaCl2 and MgCl2 concentrations and their associated ionic strengths on larval growth and survival of the freshwater prawn, Macrobrachium rosenbergii were investigated in the laboratory. Larvae were reared in diluted seawater of 15 parts per thousand salinity with elevated calcium concentrations of 330 parts per million and elevated magnesium concentrations of 1275 parts per million. Control larvae were also reared with elevated NaCl concentrations to duplicate the ionic strength increases of the combination CaCl2 - MgCl2 test solution which had the highest ionic strength. A …
Dynamic Model Of The Zone Of Aeration, Robert N. Maccallum, R. A. Sims
Dynamic Model Of The Zone Of Aeration, Robert N. Maccallum, R. A. Sims
Arkansas Water Resources Center Technical Reports
A mathematical model by Green (1), simulating one-dimensional vertical ground-water movement in unsaturated soils of the prairie region of Kansas, has been adapted for use in a wetlands environment typified by the wetlands forest of Eastern Arkansas. The model consists of two second-order, non-linear, partial differential equations and an algorithm for their numerical solution. The original model was extended to include functions for seasonal changes in transpiration and for drainage of excess precipitation. Before the addition of the two functions, the model reliability was limited to one growth season. With the mathematical model presented in this work it is possible …
Effects Of Changes In Surface Water Regime And/Or Land Use On The Vertical Distribution Of Water Available For Wetland Vegetation: Dynamic Model Of The Zone Of Aeration (Part 1 Of Completion Report For Project A-023-Ark), Robert N. Maccallum, R. A. Sims
Effects Of Changes In Surface Water Regime And/Or Land Use On The Vertical Distribution Of Water Available For Wetland Vegetation: Dynamic Model Of The Zone Of Aeration (Part 1 Of Completion Report For Project A-023-Ark), Robert N. Maccallum, R. A. Sims
Arkansas Water Resources Center Technical Reports
A mathematical model by Green, simulating one-dimensional vertical ground-water movement in unsaturated soils of the prairie region of Kansas, has been adapted for use in a wetlands environment typified by the wetlands forest of Eastern Arkansas. The model consists of two second-order, non-linear, partial differential equations and an algorithm for their numerical solution. The original model was extended to include functions for seasonal changes in transpiration and for drainage of excess precipitation. Before the addition of the two functions, the model reliability was limited to one growth season.
Review Of Prognostic Factors For Esophageal Voice, Christine G. Bravos
Review Of Prognostic Factors For Esophageal Voice, Christine G. Bravos
Loma Linda University Electronic Theses, Dissertations & Projects
Plan A of this study was completed. Plan B of the study is the subject for future research. A review of the laryngectomy literature, from the earliest mention of the laryngectomy surgical procedure to the present was conducted; with specific emphasis upon factors pertinent to laryngectomee rehabilitation and esophageal speech development. Psychological, idiosyncratic, social, therapeutic and physiological factors were reported as affecting esophageal voice development. There were a great diversity of variables that might be predictive in judging acquisition of esophageal voice. However, much of the information regarding predictive variables was based on subjective reports, poorly controlled statistical research, or …
The Future Of Coastal Zone Management: The 1980 Amendments, Kenneth J. Buckland
The Future Of Coastal Zone Management: The 1980 Amendments, Kenneth J. Buckland
Marine Affairs Theses and Major Papers
The Federal Coastal Zone Management Act of 1972 (P.L.98-583) is currently being questioned on its validity, purpose, funding, wording, and accomplishments in carrying out national policies for the benefit of the U.S. coastal zones. All the legislation promulgated for management of coastal resources, the agencies involved in coastal zone management, and the groups participating in these actions have been challenged in recent months and have subsequently been evolving in their functions. What remedies are available and how they could be realized through the present federal laws and organizational structure are areas which must be discussed now if we are to …
Effects Of Pesticides On Immune Competency: Influence Of Methyl Parathion And Carbofuran On Immunologic Responses To Salmonella Typhimurium Infection, Anna M. Fan
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Immunologic competence is correlated with resistance to infectious disease which may be affected by exposure to certain compounds. Methyl parathion (MP) and carbofuran (CF) have been reported to affect the development of active immunity in the rabbit and the present research was conducted to quantify the dosage relationships of these two pesticides to both host resistance and acquired resistance in the mouse.
Preliminary study was made on the virulence of Salmonella typhimurium in mice. Mortality rates among infected animals fed Purina Laboratory Chow diet providing 0.08, 0.7 3.0 mg MP/kg/day or 0.1, 0.6, 1.0 mg CF/kg/day along with untreated controls …
Isolation And Enumeration Of Enteric Viruses From Primary Wastewater Sludge, Michael Wayne Nath
Isolation And Enumeration Of Enteric Viruses From Primary Wastewater Sludge, Michael Wayne Nath
Biological Sciences Theses & Dissertations
The presence of large numbers of enteric viruses in wastewaters has resulted in concern regarding their significance and consequences for humans. Assessments of relative significance or consequences may most accurately be made following precise measurements of the range of virus types and amounts in wastewaters and sludges and after epidemiological considerations. In this study, results are presented pertaining to enteric virus isolation, concentration, and enumeration from primary wastewater sludges.
As an integral part of a comparison of isolation procedures, several anionic surfactants were examined for extraction of enteric viruses from primary wastewater sludges. Plaquing efficiencies for poliovirus type 2 and …
Keynote Address ─ New Concepts In Wildlife Management, Lester Mccann
Keynote Address ─ New Concepts In Wildlife Management, Lester Mccann
Vertebrate Pest Conference Proceedings: 9th (1980)
New Concepts in Wildlife Management
Environmental Manipulation In Roof Rat Control Programs, Gene Zdunowski
Environmental Manipulation In Roof Rat Control Programs, Gene Zdunowski
Vertebrate Pest Conference Proceedings: 9th (1980)
The control of roof rat Rattus rattus involves not just chemical and physical suppression, exclusion, and sanitation in an integrated environmental manipulation approach, but in order for the environmental manipulative technique to work, the environmental-behavioral habits of the individuals living in these roof rat infested areas must be modified. Once a target area of known rodent infestation has been initially impacted and environmentally improved upon, the task by the homeowner to continue to practice environmental manipulation must be ongoing. Continued maintenance of the environmentally improved area by staff knowledgeable in environmental manipulation and behavioral modification is the only way to …
The Need For Good Public Relations And Staff Training In The Use Of Toxins In Pest Destruction, Peter C. Nelson
The Need For Good Public Relations And Staff Training In The Use Of Toxins In Pest Destruction, Peter C. Nelson
Vertebrate Pest Conference Proceedings: 9th (1980)
With ever-increasing environmental pressures being placed on all animal control agencies worldwide, particularly those utilizing toxins as control weapons, the time has arisen where those agencies must attempt to anticipate these pressures which are likely to become more vocal and counter them wherever possible before they happen. It is an accepted fact that the world as a whole has become extremely environmental conscious in all fields, not just pest control. This can be seen or heard most days of the week in newspapers, on television or radio. The reasons for this awareness of the environmental problem are wide and diverse …
Predator Damage Control, 1980: Recent History And Current Status, Dale A. Wade
Predator Damage Control, 1980: Recent History And Current Status, Dale A. Wade
Vertebrate Pest Conference Proceedings: 9th (1980)
This review summarizes executive and other actions relating to cancellation of the predacides in 1972 and related events. A chronology of these actions and events is appended (Appendix A). Predator damage control operations, and research findings over the past decade, are briefly reviewed and related political decisions are discussed.
Determination Of Sediment Filtration Efficiency Of Grass Media, David T. Kao
Determination Of Sediment Filtration Efficiency Of Grass Media, David T. Kao
KWRRI Research Reports
Vegetative filters serve the purpose of retarding flow. As a result the sediment carrying power of flowing water in a vegetated channel is greatly reduced and silting takes place along the section where the vegetation is planted.
The mechanism of the filtering action of real or artificial vegetation can be described by a simplified principle, in that a gross reduction of turbulent fluctuation of the fluid is involved. This in turn allows the sediment particles to settle under the force of gravity more readily. In the case of nonsubrnerged flow, solid particles may settle out even faster due to the …
An Analysis Of The Irreversible Thermodynamics Model For Coupled Heat And Moisture Transport Phenomena In Unsaturated Porous Media, J. A. Havens
Arkansas Water Resources Center Technical Reports
The Irreversible Thermodynamics-based model for the description of coupled heat and moisture transfer, attributed to Cary and Taylor, was analyzed. The transport coefficients appearing in the model equations were independently determined, and the equations were numerically integrated to predict temperature and moisture content profiles for a closed system of water unsaturated glass beads. An experimental investigation of the moist glass beads medium provided measurements of steady-state profiles of local temperatures and moisture content. These data, when compared with model predictions, indicated the validity of the Irreversible Thermodynamics approach. The coupling coefficient relating thermal gradients to moisture flux was found to …
Comparative Schematology And Pebbling With Auxiliary Pushdowns, Nicholas J. Pippenger
Comparative Schematology And Pebbling With Auxiliary Pushdowns, Nicholas J. Pippenger
All HMC Faculty Publications and Research
This paper has three claims to interest. First, it combines comparative schematology with complexity theory. This combination is capable of distinguishing among Strong's “languages of maximal power,” a distinction not possible when comparative schematology is based on computability considerations alone, and it is capable of establishing exponential disparities in running times, a capability not currently possessed by complexity theory alone. Secondly, this paper inaugurates the study of pebbling with auxiliary pushdowns, which bears to plain pebbling the same relationship as Cook's study of space-bounded machines with auxiliary pushdowns bears to plain space-bounded machines. This extension of pebbling serves as the …
1980-1981 Nova College Bulletin, Nova Southeastern University
1980-1981 Nova College Bulletin, Nova Southeastern University
Undergraduate Programs Course Catalogs
No abstract provided.
University Of Texas At Tyler Catalog, 1980-1981, University Of Texas At Tyler
University Of Texas At Tyler Catalog, 1980-1981, University Of Texas At Tyler
Catalogs
No abstract provided.
Contamination Of Boone-St. Joe Limestone Groundwater By Septic Tanks And Chicken Houses, Gerald D. Cox, Albert E. Ogden, Gretta Slavik
Contamination Of Boone-St. Joe Limestone Groundwater By Septic Tanks And Chicken Houses, Gerald D. Cox, Albert E. Ogden, Gretta Slavik
Journal of the Arkansas Academy of Science
Eighty-one water samples were collected from wells in the Boone-St. Joe limestone aquifer of northwest Arkansas and analyzed for fecal coliform, fecal streptococcus, total coliform bacteria, chloride, phosphate, nitrate and sulfate to determine the degree of contamination. Forty-nine percent of the samples had fecal streptococcus counts greater than 1 colony per 100 ml, 68% had total coliform counts of 1 or more colonies per 100 ml, and 9% of the wells had fecal coliform counts of 1 or more colonies per 100 ml. Water from wells in Clarksville, Nixa, Noark, Tonti and Waben cherty silt loam soils showed from 83 …
Mercury Content Of Waters In The Midcontinent Region, Larry Barber Ii, Kenneth F. Steele
Mercury Content Of Waters In The Midcontinent Region, Larry Barber Ii, Kenneth F. Steele
Journal of the Arkansas Academy of Science
Two major areas of the midcontinent region were investigated for their aqueous mercury concentrations. Sixteen surface water and 17 ground water samples were collected in an eleven county area of N.W. Arkansas, S.W. Missouri and N.E. Oklahoma (Ozark area) and analyzed for total dissolved mercury by the flameless atomic absorption spectrophotometric method. The range (<0.2 to 0.8 ppb), the mean (0.4 ppb) and the median (0.4 ppb) are the same for both ground water and surface water. Values obtained for the Ozark area are slightly greater than those reported for surface water by others (about 0.1 ppb), but are well within the range reported for surface waters (0.1 to 17.0 ppb). The range for 102 ground water samples from the Ouachita Mountain area is <0.1 to 2.3 ppb, the mean 0.3 ppb and the median 0.1 ppb. Thus, the mercury values for this area are similar to those of the Ozark area except fora higher upper range. The mercury mineralization (cinnabar) in the southern part of the Ouachita Mountain area, in part, is the cause of the higher values. Only two samples (2.1 and 2.3 ppb), both from the Ouachita Mountain area, exceed the EPA drinking water limits of 2 ppb mercury in the western Arkansas region.
Macroscopic Benthos Populations In A South Dakota Power Plant Cooling Reservoir, Gordon B. Sloane
Macroscopic Benthos Populations In A South Dakota Power Plant Cooling Reservoir, Gordon B. Sloane
Electronic Theses and Dissertations
The standing crop, distribution, seasonal variation, and entrainment of benthos were studied at the Big Stone Power Plant cooling reservoir. Benthos samples were collected from January 1979 through March 1980 utilizing a stratified random sampling design in 3 areas related to the thermal discharge site and cooling water intake sites. Maximum surface and bottom water temperatures in the discharge area were 42.0 C and 33.5 C respectively. The intake area had a maximum surface and bottom temperature of 32.0 C and 30.0 C respectively. Reservoir temperatures ranged from 0.0 C to 42.0 C during the study. Dissolved oxygen ranged from …
The Removal Of Viruses From Water By Conventional Water-Treatment Practices, Janet S. Ziegle
The Removal Of Viruses From Water By Conventional Water-Treatment Practices, Janet S. Ziegle
Masters Theses
The purpose of this investigation was to determine the effectiveness of conventional water-treatment methods in removing viruses from raw water sources. Those processes studied included alum flocculation, rapid sand filtration of fleeced and unflocced water samples, and chlorine disinfection.
This study was approached using coliphage f2 as a seeded indicator of treatment efficiency. Coliphage f2 was chosen as an indicator because of its similarities to enteric viral pathogens in both morphology and sensitivity to water-treatment processes. Coliphage f2 was found to occur naturally in surface waters, but not in numbers sufficient to interfere with calculations.
A sand filter for laboratory …
Navigational Compass In Magnetic Bacteria, Richard B. Frankel, R. P. Blakemore
Navigational Compass In Magnetic Bacteria, Richard B. Frankel, R. P. Blakemore
Physics
Magnetotactic bacteria that orient and swim in a preferred direction in the geomagnetic field contain sufficient single domain magnetite to constitute a biomagnetic compass.
The Evolution Of Supernova Remnants In Different Galactic Environments, And Its Effects On Supernova Statistics, Menas Kafatos, S. Sofia, C. Bruhweilier, T. R. Gull
The Evolution Of Supernova Remnants In Different Galactic Environments, And Its Effects On Supernova Statistics, Menas Kafatos, S. Sofia, C. Bruhweilier, T. R. Gull
Mathematics, Physics, and Computer Science Faculty Articles and Research
By examining the interaction between supernova (SN) ejecta and the various environments in which the explosive event might occur, we conclude that only a small fraction of the many SNs produce observable supernova remnants (SNRs). This fraction, which is found to depend weakly upon the lower mass limit of the SN progenitors, and more strongly on the specific characteristics of the associated interstellar medium, decreases from approximately 15% near the galactic center to 10% at R8a1 -10 kpc and drops nearly to zero for Rga~> 15 kpc. Generally, whether a SNR is detectable is determined by the density of the …
Nova University Nova College For Career-Focused Adults Part-Time Degree Programs Undergraduate Evening And Saturday Courses [No Date], Nova University
Nova University Nova College For Career-Focused Adults Part-Time Degree Programs Undergraduate Evening And Saturday Courses [No Date], Nova University
Abraham S. Fischler College of Education and School of Criminal Justice College Archive
No abstract provided.
Inhibition Of N⁸-Acetylspermidine Deacetylation Activity Of Rat Liver, Michael J. Santacroce
Inhibition Of N⁸-Acetylspermidine Deacetylation Activity Of Rat Liver, Michael J. Santacroce
University of the Pacific Theses and Dissertations
An enzyme activity located in the soluble fraction of rat liver which is known to deacetylate N8-acetylspermidine is studied. Using a crude cytosol preparation from rat liver, tritium-labelled N8-acetylspermidine [acetyl-3H] was shown to undergo deacetylation which was dependent upon both time of incubation and protein concentration. The Michalis constant for this deacetylation of N8-acetylspermidine is approximately 4.4 μM.
N1-Acetylspermidine showed a competitive inhibition of this N8-acetylspermidine deacetylation activity, and was found to be the most potent inhibitor tested. Diamine and polyamine compounds were also shown to inhibit the …
Evaluation Of Particular Mulches As Plant Growth Media And Erosion Inhibitors, C. Earl Israelson, William F. Campbell, Eugene K. Israelsen, Ronald V. Canfield, David Ianson
Evaluation Of Particular Mulches As Plant Growth Media And Erosion Inhibitors, C. Earl Israelson, William F. Campbell, Eugene K. Israelsen, Ronald V. Canfield, David Ianson
Reports
Introduction: Increasing public awareness of the desireability of protecting the environment from soil erosion caused by wind and water has centered attention on large construction projects such as highways and housing subdivisions, as well as on individual building sites and parking lots. If unattended, sediment produced from these areas pollutes surface water, restricts drainage, fills reservoirs, damages adjacent land, and upsets the natual ecology of lakes and streams. The search continues for products and practices that will prevent or lessen the amount of sediment leaving construction sites. Products currently in use include chemical as well as organic materials, and they …
Use Of Saline Water In Energy Development, C. Earl Israelsen, V. Dean Adams, J. Clair Batty, Dennis B. George
Use Of Saline Water In Energy Development, C. Earl Israelsen, V. Dean Adams, J. Clair Batty, Dennis B. George
Reports
Maps were made of the Upper Colorado River Basin showing locations of coal deposits, oil and gas, oil shale, uranium, and tar sand, in relationship to cities and towns in the area. Superimposed on these are locations of wells showing four ranges of water quality; 1,000-3,000 mg/l, 3,000-10,000 mg/l, 10,000-35,000 mg/l, and over 35,000 mg/l. Information was assembled relative to future energy-related projects in the upper basin, and estimates were made of their anticipated water needs. Using computer models, various options were tested for using saline water for coal-fired power plant cooling. Both cooling towers and brine evaporation ponds were …
Influence Of Unsaturated Hydraulic Properties On Infiltration From Circular Surface Areas, Abdolhossien Nassehzadeh-Tabrizi, Roland W. Jeppson
Influence Of Unsaturated Hydraulic Properties On Infiltration From Circular Surface Areas, Abdolhossien Nassehzadeh-Tabrizi, Roland W. Jeppson
Reports
The effects and interactive effects on infiltration of parameters in the Brooks-Corey equation for defining the hydraulic properties of unsaturated soils are investigated by analyzing the results of numerical solutions of the unsaturated flow characteristics resulting from water applied on a circular surface area. The soil parameters are allowed to vary continuously as a function of depth. The parameters that have been allowed to vary separately and in pairs are: (1) The pore size distribution exponent, (2) Pb- The bubbling pressure, (3) Sr- The residual saturation, (4) n- The soil porosity and (5) Ko- The saturated hydraulic conductivity. The conclusions …