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

Digital Commons Network™

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

University of Arkansas, Fayetteville

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 6271 - 6300 of 7188

Full-Text Articles in Entire DC Network

Additions To The List Of Schizocosa (Family Lycosidae) For Arkansas, Risa Parker, Peggy Rae Dorris Jan 1995

Additions To The List Of Schizocosa (Family Lycosidae) For Arkansas, Risa Parker, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

Schizocosa rovneri and Schizocosa stridulans, collected by the pitfall trap method in Drew and Ashley Counties, are reported as new species for the Arkansas state list. Palp variation and legmorphology are the main distinguishing characteristics between these species. Two previously defined species of Schizocosa are also discussed for clarification

Go to article

Conceptual Basis For An Index Of Forest Integrity For Upland Coastal Plain Ecosystems, Nicholas R. Brown, Brian Roy Lockhart, Philip A. Tappe, Lynne C. Thompson, Robert C. Weih Jr., Richard A. Williams Jan 1995

Conceptual Basis For An Index Of Forest Integrity For Upland Coastal Plain Ecosystems, Nicholas R. Brown, Brian Roy Lockhart, Philip A. Tappe, Lynne C. Thompson, Robert C. Weih Jr., Richard A. Williams

Journal of the Arkansas Academy of Science

Following the recent trend to manage natural resources for "sustainability," ecologists, resource managers and policymakers are beginning to think of the management of forest ecosystems in terms of "ecosystem health" or "ecosystem integrity." Biologists are increasingly recognizing that use of chemical assays in assessing the condition of an ecosystem has limited value, and that biological factors, e.g., species diversity and composition, can be useful characters in the analysis of "biotic integrity." An index of biotic integrity (IBI) has been developed for riverine ecosystems in the Midwest U.S., using fish species diversity, indicator population analysis, trophic structure assessment, and physiological abnormalities …

Go to article

Influence Of Pine Silvicultural Systems On Spider Population Diversity In Drew County, Arkansas, Holly Hill, Peggy Rae Dorris, Lynne C. Thompson Jan 1995

Influence Of Pine Silvicultural Systems On Spider Population Diversity In Drew County, Arkansas, Holly Hill, Peggy Rae Dorris, Lynne C. Thompson

Journal of the Arkansas Academy of Science

Spiders were collected by pit-trapping in southeastern Arkansas in 1984. Collection areas included two pine silvicultural treatments, clear-cutting and selection cutting; and control stands, where no cutting occurred. Spider populations decreased with increased disturbance.

Go to article

Prediction Of Leaf Area In Individual Leaves Of Cherrybark Oak Seedlings (Quercus Pagoda Raf.), Yanfei Guo, Brian Lockhart, John Hodges Jan 1995

Prediction Of Leaf Area In Individual Leaves Of Cherrybark Oak Seedlings (Quercus Pagoda Raf.), Yanfei Guo, Brian Lockhart, John Hodges

Journal of the Arkansas Academy of Science

The prediction of leaf area for cherrybark oak (Quercus pagoda Raf.) seedlings is important for studying the physiology of the species. Linear and polynomial models involving leaf length, width, fresh weight, dry weight, and internodal length were tested independently and collectively to predict leaf area. Twenty-nine cherrybark oak seedlings were grown in a greenhouse for one growing season and a total of 468 leaves were collected. Leaf area was polynomially related with leaf length or width, but linearly related with the cross product of length and width. Average leaf area for flush 3 was significantly greater than those of other …

Go to article

A 31p, 13c, And 1h Nmr Study Of The Direct Interaction Of Cocaine Hc1 And Magnesium Atp, Gene Lee Bangs, Roger M. Hawk, Debi Patangia Jan 1995

A 31p, 13c, And 1h Nmr Study Of The Direct Interaction Of Cocaine Hc1 And Magnesium Atp, Gene Lee Bangs, Roger M. Hawk, Debi Patangia

Journal of the Arkansas Academy of Science

In vivo 31P NMR studies recently have shown that cocaine causes an imbalance of the free magnesium in the brain which results in pH lowering, ischemia, and even death. This direct interaction with the free Mg+2 inthe brain also affects the Ca+2 balance which controls arterial and vascular contraction. This research has addressed the mechanism of the cocaine interaction withmagnesium adenosine 5-triphosphate (ATP) using 31P, 13C, and 1H NMR using a Bruker 200 MHz nuclear magnetic resonance (NMR) system. Data are presented and discussed which shows that cocaine and ATP form a complex species which directly affects the NMR spectra.

Go to article

Proceedings Of The Arkansas Academy Of Science - Volume 49 1995, Academy Editors Jan 1995

Proceedings Of The Arkansas Academy Of Science - Volume 49 1995, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Spiders (Arthropoda: Aranea) From Deciduous Forest Litter Of The Ouachita Highlands, Peggy Rae Dorris, Henry W. Robison, Chris Carlton Jan 1995

Spiders (Arthropoda: Aranea) From Deciduous Forest Litter Of The Ouachita Highlands, Peggy Rae Dorris, Henry W. Robison, Chris Carlton

Journal of the Arkansas Academy of Science

One hundred two litter samples were collected from oak/hickory and maple/beech forests in the Ouachita Highlands of western Arkansas July 1991-June 1992. Berlese residues of these collections produced 17 families, 51 genera, and 56 species of spiders, and included 19 species previously unreported for the state of Arkansas.

Go to article

Dytiscidae (Coleoptera) Of Jackson County, Arkansas, Anthony Holt, George L. Harp Jan 1995

Dytiscidae (Coleoptera) Of Jackson County, Arkansas, Anthony Holt, George L. Harp

Journal of the Arkansas Academy of Science

Dytiscid beetles were surveyed to establish a baseline list for this county, which lies primarily in the Mississippi Alluvial Plain. This list was then compared with that for an Ozark county, which had been surveyed in a previous study. Eighteen sites were surveyed by Turtox Indestructible ™ dip net and funnel traps. Museum holdings and literature records were also searched. Twenty-one taxa were collected, with temporary ponds and oxbow/cypress swamps supporting the greatest diversity. These are the least disturbed sites in Jackson County. Most species collected are generally widely distributed and prefer either shaded ponds/pools with some leaf litter, or …

Go to article

Recent Establishment Of The Asian Tiger Mosquito (Aedes Albopictus) In Independence County, Arkansas, David H. Jamieson, Larry A. Olson Jan 1995

Recent Establishment Of The Asian Tiger Mosquito (Aedes Albopictus) In Independence County, Arkansas, David H. Jamieson, Larry A. Olson

Journal of the Arkansas Academy of Science

Three adult Aedes albopictus were collected on 10 August 1993 within the city limits of Batesville, Arkansas. This is the firs tknown report of this species from Independence County. Subsequent investigation revealed the presence of at least three well established populations in the county, two of which were monitored on a monthly basis from Aprilto September of 1994. Peak A. albopictus numbers were recorded in July and August when the population levels were sufficient to make this mosquito a significant pest in Batesville. Our observations suggest that the Asian tiger mosquito will likely colonize other similar communities in Arkansas.

Go to article

Recreational And Angler Survey Of The Buffalo National River, Arkansas, James E. Johnson Jan 1995

Recreational And Angler Survey Of The Buffalo National River, Arkansas, James E. Johnson

Journal of the Arkansas Academy of Science

The Buffalo River in northern Arkansas was surveyed for recreator and angler use in 1991 and 1992. The river was divided into three reaches and numbers of boats, recreators, anglers, and catches were compiled by creel clerks at nine selected take-out points. Outfitter rental receipts were used to estimate rental boats, and the proportion of rental to private boats creeled was used to correct for private boats not counted on the rental receipts. A total of 1,656 boats containing 3,071 recreators was contracted by the creel clerks during 1991 and 1992; 9.2% of the recreators were anglers. Expansion of the …

Go to article

Cavity Protection Techniques For Red-Cockaded Woodpeckers, Warren G. Montague Jan 1995

Cavity Protection Techniques For Red-Cockaded Woodpeckers, Warren G. Montague

Journal of the Arkansas Academy of Science

Population growth of red-cockaded woodpeckers (Picoides borealis) is often limited by the availability of suitable cavities. Structural damage to natural and artificial cavities intended for use by P. borealis is common. Roost and nest cavities of P. borealis often become occupied by other cavity-dependent species. Techniques for preventing damage to artificial cavities and for deterring southern flying squirrel (Glaucomys volans) use of otherwise serviceable cavities are described. Such cavity protection techniques may be necessary to prevent extirpation of small, isolated populations of P. borealis.

Go to article

5'-Nucleotidase And Thrombin-Like Activities Of Selected Crotalid Venoms, Ali M.S. Shams, Dewey H. Sifford, Bob D. Johnson Jan 1995

5'-Nucleotidase And Thrombin-Like Activities Of Selected Crotalid Venoms, Ali M.S. Shams, Dewey H. Sifford, Bob D. Johnson

Journal of the Arkansas Academy of Science

Thrombin-like activities were not observed inCrotalus basiliscus, C. molossus and C. scutulatus scutulatus crude venoms. 5'-Nucleotidase specific activities of 0.863, 0.273 and 5.520 units/mg of crude venom protein were observed inC. basiliscus, C. molossus and C. s. scutulatus venoms, respectively. Concanavalin ASepharose 4 B (Con A)affinitychromatography yielded two fractions from each of the crude venoms. Ineach instance, both fractions exhibited 5'-nucleotidase activities and the Con A-binding proteins had higher activities than the Con A-nonbinding proteins. 5'-Nucleotidase activities inthe DEAESephadex A-50 chromatographic fractions were localized in the first elution fraction and the last fraction(s) to elute. EDTAhad no effect on the …

Go to article

Vertebrate Fauna Of Abandoned Mines At Gold Mine Springs, Independence County, Arkansas, Chris T. Mcallister, Stanley E. Trauth, Linda D. Gage Jan 1995

Vertebrate Fauna Of Abandoned Mines At Gold Mine Springs, Independence County, Arkansas, Chris T. Mcallister, Stanley E. Trauth, Linda D. Gage

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Vertebrate Prey Of Selected Arkansas Snakes, Stanley E. Trauth, Chris T. Mcallister Jan 1995

Vertebrate Prey Of Selected Arkansas Snakes, Stanley E. Trauth, Chris T. Mcallister

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Egg Mass Characteristics Of Terrestrial Morphs Of The Mole Salamander, Ambystoma Talpoideum (Caudata:Ambystomatidae), From Northeastern Arkansas And Clutch Comparisons With Other Ambystoma Species, Stanley E. Trauth, Robert L. Cox Jr., J. D. Wilhide, Hilary J. Worley Jan 1995

Egg Mass Characteristics Of Terrestrial Morphs Of The Mole Salamander, Ambystoma Talpoideum (Caudata:Ambystomatidae), From Northeastern Arkansas And Clutch Comparisons With Other Ambystoma Species, Stanley E. Trauth, Robert L. Cox Jr., J. D. Wilhide, Hilary J. Worley

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Publication Policies And Suggestions For Authors, Academy Editors Jan 1995

Publication Policies And Suggestions For Authors, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Determination Of The Seasonal Changes In Nitrate And Phosphate Concentration And Phytoplankton Composition Within Selected Fertilized Lakes, Richard L. Meyer Dec 1994

Determination Of The Seasonal Changes In Nitrate And Phosphate Concentration And Phytoplankton Composition Within Selected Fertilized Lakes, Richard L. Meyer

Arkansas Water Resources Center Technical Reports

No abstract provided.

Go to article

The Moore's Creek Monitoring Project, D. R. Edwards, T, C, Daniel, J. F. Murdoch, P. F. Vendrell, D. J. Nichols Oct 1994

The Moore's Creek Monitoring Project, D. R. Edwards, T, C, Daniel, J. F. Murdoch, P. F. Vendrell, D. J. Nichols

Arkansas Water Resources Center Technical Reports

No abstract provided.

Go to article

Phosphorus Immobilization In Poultry Litter And Litter-Amended Soils With Aluminum, Calcium And Iron Amendments, D. M. Miller, P. A. Moore Jr., T. C. Daniels Sep 1994

Phosphorus Immobilization In Poultry Litter And Litter-Amended Soils With Aluminum, Calcium And Iron Amendments, D. M. Miller, P. A. Moore Jr., T. C. Daniels

Arkansas Water Resources Center Technical Reports

Arkansas produces approximately one billion broilers each year. Phosphorous (P) runoff from fields receiving poultry litter is believed to be one of the primary factors affecting water quality in Northwest Arkansas. Poultry litter contains approximately 20 g P kg-1, of which about 2 g P kg-1 is water soluble. Soils that have received repeated heavy applications of litter may have water soluble P contents of as high as 10 mg P Kg-1 soil. The objective of this study was to determine if soluble P levels could be reduced in poultry litter and litter-amended soils with Al,Ca, and/or Fe amendments. Poultry …

Go to article

The Prediction Of Sediment And Nutrient Transport In The Buffalo River Watershed Using A Geographic Information System, H. D. Scott, P. A. Smith Jun 1994

The Prediction Of Sediment And Nutrient Transport In The Buffalo River Watershed Using A Geographic Information System, H. D. Scott, P. A. Smith

Arkansas Water Resources Center Technical Reports

The Buffalo River was established by Congress in 1972 as the first National River in the United States. It is one of the few remaining free-flowing streams in northern Arkansas. The river originates in the higher elevations of the Boston Mountains in Newton County, and generally flows northeastward, intersecting the Springfield and Salem Plateaus as it drops from approximately 2000 feet in the headwaters to around 500 feet at the confluence with the White River in Marion County. It is considered by many to be one of Arkansas' greatest natural treasures, and therefore , there is strong interest in protecting …

Go to article

Assessment Of Effectiveness Of Buffer Zones In Removing Impurites In Runoff From Areas Treated With Poultry Litter, I. Chaubey, D. R. Edwards, T. C. Daniels Jun 1994

Assessment Of Effectiveness Of Buffer Zones In Removing Impurites In Runoff From Areas Treated With Poultry Litter, I. Chaubey, D. R. Edwards, T. C. Daniels

Arkansas Water Resources Center Technical Reports

Land application of animal manures (e.g. poultry litter, poultry manure, and swine manure) to pasture and range can lead to runoff quality degradation during storms that occur soon after application. Vegetative filter strips (VFS) have been shown to reduce pollution in runoff from row-cropped areas but have not been extensively studied in pasture and range settings. This research involved characterizing performance of fescue VFS in improving quality of runoff from pasture land areas treated with poultry litter and swine manure. The VFS were found to be quite effective in reducing off-site transport of ammonia nitrogen (NH3-N), total Kjeldahl nitrogen (TKN), …

Go to article

Method For Reducing Or Eliminating Microorganisms In Substances By Electric Stimulation, Carl L. Griffis, Michael F. Slavik, Phillip V. Engler, Yanbin Li Feb 1994

Method For Reducing Or Eliminating Microorganisms In Substances By Electric Stimulation, Carl L. Griffis, Michael F. Slavik, Phillip V. Engler, Yanbin Li

Patents Granted

Describes a method for the reduction or elimination of microbes in liquid or food products. The passage of a waveform, such as a DC square-wave, of a specific amplitude, duty cycle and current through the liquid or food product for a specific time period, allows for the elimination of microbes such as Salmonella Typhimurium from a variety of substances, including water, milk and solid food products.

Go to article

Food Habits Of The Barn Owl (Tyto Alba) At A Nest Site In Southwest Arkansas, Johnathan L. Westmoreland, C. Renn Tumlison Jan 1994

Food Habits Of The Barn Owl (Tyto Alba) At A Nest Site In Southwest Arkansas, Johnathan L. Westmoreland, C. Renn Tumlison

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Ground Water Monitoring Project For Arkansas, Phase Iii, Kenneth F. Steele, Steven S. Hill, Terry W. Nichols, H. Don Scott, Paul Vendrell, H. S. Lin Jan 1994

Ground Water Monitoring Project For Arkansas, Phase Iii, Kenneth F. Steele, Steven S. Hill, Terry W. Nichols, H. Don Scott, Paul Vendrell, H. S. Lin

Arkansas Water Resources Center Technical Reports

This report is composed of two parts. The first part is an interpretation of the pesticide and nitrate data collected in Woodruff County based on samples collected during 1994. Because there is an indication that there were hydrological differences between 1994 and 1995, and because most of the pesticide data is from 1994, this interpretive portion is restricted to 1994 data. Six wells initially sampled in 1994 that contained pesticides had continuing contamination in re-sampling in 1994 and 1995. Part II lists a seventh well in Woodruff County that contained pesticides in February and May of 1995

Go to article

Multisite Microprobes For Electrochemical Recordings In Biological Dynamics, G. Sreenivas, S. S. Ang, R. M. Ranade, A. S. Salian, W. D. Brown Jan 1994

Multisite Microprobes For Electrochemical Recordings In Biological Dynamics, G. Sreenivas, S. S. Ang, R. M. Ranade, A. S. Salian, W. D. Brown

Journal of the Arkansas Academy of Science

For over 30 years, techniques have been developed that allow for the microscale (10-30 /mum) measurement of chemical signals with high temporal resolution (1-200 Hz). Such measurements, called in vivo electrochemical recordings, allow for the direct determination of neurotransmitter molecules and related compounds in biological systems. Multiple recordings, simultaneously performed at different, closely spaced, well defined locations throughout a three-dimensional tissue volume in the brain, are of interest in neuroscience. Developments in microelectronic techniques enable the fabrication of multi-electrode microprobes for recording extracellular action potentials generated by individual neurons simultaneously. A high-yield microfabrication process has been successfully developed for the …

Go to article

Correlation Between Chromatid Deletion Production And Progression Of The Dna Replication Fork In Uv-Irradiated S Phase Xenopus Cells, Daniel M. Yoder, Jason M. Hiles, H. Gaston Griggs Jan 1994

Correlation Between Chromatid Deletion Production And Progression Of The Dna Replication Fork In Uv-Irradiated S Phase Xenopus Cells, Daniel M. Yoder, Jason M. Hiles, H. Gaston Griggs

Journal of the Arkansas Academy of Science

Experimentation was performed primarily to determine whether progression of the DNA replication fork along segments of S phase Xenopus chromosomes, which contain UV-induced pre-aberrational lesions, plays a significant role in conversion of these lesions into chromatid deletions. Specifically, a Xenopus chromosome that was both easy to identify and that possessed a single DNA replication fork in one arm was found and used to conduct the experimentation. This chromosome was exposed to UV in early S phase and a Bromodeoxyuridine/Giemsa differential staining technique was applied in conjunction with conventional aberrational techniques to correlate progression of the DNA replication fork through segments …

Go to article

Bryophyte And Pteridophyte Distribution Records Of Southern Arkansas, James R. Bray, Greg A. Whitehead, Daniel L. Marsh, Dennis W. Mcmasters Jan 1994

Bryophyte And Pteridophyte Distribution Records Of Southern Arkansas, James R. Bray, Greg A. Whitehead, Daniel L. Marsh, Dennis W. Mcmasters

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Effective, Reliable, Inexpensive Cryofixation Device, Lawrence A. Mink, Roger A. Buchanan Jan 1994

Effective, Reliable, Inexpensive Cryofixation Device, Lawrence A. Mink, Roger A. Buchanan

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Long-Range Dispersal Of A Red-Cockaded Woodpecker, Warren G. Montague, George A. Bukenhofer Jan 1994

Long-Range Dispersal Of A Red-Cockaded Woodpecker, Warren G. Montague, George A. Bukenhofer

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Publication Policies And Suggestions For Authors, Academy Editors Jan 1994

Publication Policies And Suggestions For Authors, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

First Prev Next Last