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Articles 1 - 30 of 38
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Fish Community Of Indian Bayou, A Coastal Plain Stream Of Remarkable Species Richness In The Lower White River Drainage Of Arkansas, Thomas M. Buchanan
Fish Community Of Indian Bayou, A Coastal Plain Stream Of Remarkable Species Richness In The Lower White River Drainage Of Arkansas, Thomas M. Buchanan
Journal of the Arkansas Academy of Science
It is increasingly important to identify unique aquatic ecosystems in the coastal plain lowlands of Arkansas, because of the extensive human-induced alteration of aquatic habitats and loss of fish diversity in that region. Indian Bayou, part of a small (103 km2 ), chute-fed drainage system off the lower White River in Monroe County, Arkansas, has a fish community that is unique among Delta streams in darter (Percidae) species richness. Twenty-five fish samples collected by seine and rotenone from the Indian Bayou drainage system over an 18-year period produced 62 fish species, including 13 darter species. The fish community at one …
Method To Correct The Voxel Size In Press Localized Nmr Stereoscopy, Diana M. Lindquist, Roger M. Hawk, Richard A. Komoroski
Method To Correct The Voxel Size In Press Localized Nmr Stereoscopy, Diana M. Lindquist, Roger M. Hawk, Richard A. Komoroski
Journal of the Arkansas Academy of Science
Two techniques commonly used on human magnetic resonance spectroscopy systems to obtain spectra from localized volumes in the brain are point resolved spectroscopy (PRESS) and stimulated echo acquisition mode (STEAM) spectroscopy. PRESS gives a signal twice as large as that obtained with STEAM, but suffers from longer minimum echo times. While STEAM must be used to detect species with short spin-spin relaxation times, PRESS can be used for species with longer relaxation times to give a spectrum with a better signal to noise ratio. Only STEAM was provided for the GE Omega 4.7 T small animal imager used in this …
Acidity Studies Of Deuterated Acids And Bases Commonly Used As Buffers In Nmr Studies, Rose M. Mcconnell, Walter E. Godwin, Brant Stanley, M. Shane Green
Acidity Studies Of Deuterated Acids And Bases Commonly Used As Buffers In Nmr Studies, Rose M. Mcconnell, Walter E. Godwin, Brant Stanley, M. Shane Green
Journal of the Arkansas Academy of Science
Structure based drug development is currently considered to be an important strategy for drug discovery. This strategy requires that critical knowledge of the three dimensional binding site on receptor molecules be known. NMR studies are frequently employed to ascertain important structural data on individual proteins as well as complexes of proteins with ligands. Deuterium labeled acids and bases are frequently used as buffers in deuterium oxide solutions for NMR studies on the structural conformations of bioactive molecules. Since pH is an important factor in any study of the conformational and stereochemical aspects of biologically active molecules, deuterated buffers are an …
Distribution And Status Of The Ozark Shiner, Notropos Ozarcanus Meek, In Arkansas, Henry W. Robison
Distribution And Status Of The Ozark Shiner, Notropos Ozarcanus Meek, In Arkansas, Henry W. Robison
Journal of the Arkansas Academy of Science
The Ozark shiner, Notropis ozarcanus, an endemic species of the Ozark Highlands, was studied from 1994-1995 to determine its present distribution and conservation status in Arkansas. One-hundred and four collections of fishes were made from throughout the historic range of the Ozark shiner. A total of 91 Ozark shiners was collected during the two-year study. The present state distribution is described as well as the conservation status of the Ozark shiner in Arkansas. The largest populations seem to be present in the protected Buffalo River.
Publication Policies And Suggestions For Authors, Academy Editors
Publication Policies And Suggestions For Authors, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
81st Annual Meeting, 1997. Secretary's Report And Financial Statement, Academy Editors
81st Annual Meeting, 1997. Secretary's Report And Financial Statement, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Revised Status Of Rare And Endangered Unionaea (Mollusca: Margaritiferidae, Unionidae) In Arkansas, John L. Harris, Peter J. Rust, Alan D. Christian, William R. Posey Ii, Chris L. Davidson, George L. Harp
Revised Status Of Rare And Endangered Unionaea (Mollusca: Margaritiferidae, Unionidae) In Arkansas, John L. Harris, Peter J. Rust, Alan D. Christian, William R. Posey Ii, Chris L. Davidson, George L. Harp
Journal of the Arkansas Academy of Science
Harris and Gordon (1987) reviewed the distribution and status of 18 rare and /or endangered unionacean bivalve species (commonly referred to as clams, mussels, freshwater mussels, naiads) that occur or have occurred in Arkansas. They discussed four species that were federally listed as endangered, four species that were considered endangered or extirpated within Arkansas, four species considered threatened within Arkansas, four species of special concern within Arkansas, and two species for which the conservation status was considered uncertain due to questions regarding taxonomic validity. Numerous unionacean field surveys have been performed during 1986 1996, and a substantial database of new …
Assessing The Cost Of Best Management Practices In Arkansas, Richard A. Kluender, Robert C. Weih Jr., M. Corrigan, J. Pickett
Assessing The Cost Of Best Management Practices In Arkansas, Richard A. Kluender, Robert C. Weih Jr., M. Corrigan, J. Pickett
Journal of the Arkansas Academy of Science
A geographic information system (GIS) is a set of powerful, computer-based, analytical algorithms for solving spatial data problems. Recently, due to increases in memory size, computing speed, and programming advances, personal computers have been used in spatial analysis problems. This study reports the benefits of using a PC-based GIS system to solve a common, but complicated problem in forest management: assignment of harvesting areas with harvesting exclusion zones. Two stands each from the USDA Crossett Experimental Forest, the University of Arkansas Forest, and the Ouachita National Forest (total six) were analyzed to determine the changes due to following best management …
Thin Film Deposition Of Silicon For Solar Cell Applications, Sailesh Kumar, Roger M. Hawk
Thin Film Deposition Of Silicon For Solar Cell Applications, Sailesh Kumar, Roger M. Hawk
Journal of the Arkansas Academy of Science
Thin films of silicon have been formed using a patented electrostatic deposition method which utilizes charged particle motion in an electric field. After deposition, the films are heat treated for varying times and temperatures in a programmable furnace maintained under a purified argon atmosphere. X-ray diffraction (XRD) confirmed that these films were polycrystalline in nature. These films were found to have grain sizes of about 50 microns. Solar cells were fabricated using these large grained polycrystalline silicon films by sputtering pure gold as both front and back contacts. The cells have shown efficiencies of 1.8%. This paper reports on the …
Age, Growth And Condition Of Largemouth Bass, Micropterus Salmoides, Of Lake Ashbaugh, Arkansas, Ronald L. Johnson, Rosalyne M. Davis
Age, Growth And Condition Of Largemouth Bass, Micropterus Salmoides, Of Lake Ashbaugh, Arkansas, Ronald L. Johnson, Rosalyne M. Davis
Journal of the Arkansas Academy of Science
The population size structure, length at age and condition of 140 largemouth bass, Micropterus salmoides, were studied for Lake Ashbaugh, Arkansas. Scales and otoliths were used for age and length at age determination of individual bass. Length at age was determined by back-calculation and relative weight was used to measure condition. The Lake Ashbaugh population is dominated by young, slow growing bass in poor condition. Ninety-one percent of the largemouth bass in Lake Ashbaugh were less than four years of age, with age 3+ bass serving as the dominant year class. Proportional and relative stock density values were 25 and …
Presence Of Hantavirus In Small Mammals Of The Ouachita Mountains, Roger W. Perry, Ronald E. Thill, Philip A. Tappe, M. Anthony Melchiors
Presence Of Hantavirus In Small Mammals Of The Ouachita Mountains, Roger W. Perry, Ronald E. Thill, Philip A. Tappe, M. Anthony Melchiors
Journal of the Arkansas Academy of Science
No abstract provided.
Prediction Of Potential Antimigraine Activity Using Artificial Neural Networks, Qing Luo, Jerry A. Darsey, Cesar M. Compadre, Sanjay K. Mitra
Prediction Of Potential Antimigraine Activity Using Artificial Neural Networks, Qing Luo, Jerry A. Darsey, Cesar M. Compadre, Sanjay K. Mitra
Journal of the Arkansas Academy of Science
More than 10 million Americans, three quarters of them women, suffer some degree of recurrent migraine headaches. Feverfew [Tanacetum parthenium (L.) Schultz-Bip.) is a member of the Asteraceae family that is native to Europe. This plant is a perennial flowering aromatic plant common in gardens. It has been widely used as a self-medication of arthritis, fever, and migraine headaches for over 2000 years. Sesquiterpene lactones (SL) are the components responsible for the antimigraine activity of feverfew. In this research, the relationship between SL structural information and their biological activity was studied by using Gaussian 92 program in conjunction with artificial …
Discovery Of Fossil Cretaceous Bird In Southwest Arkansas, Leo Carson Davis, Kathie Harris
Discovery Of Fossil Cretaceous Bird In Southwest Arkansas, Leo Carson Davis, Kathie Harris
Journal of the Arkansas Academy of Science
No abstract provided.
New Records For The Distribution Of An Unusual Liverwort, Petalophyllum Ralfsii (Fossombroniaceae), Daniel L. Marsh, Timothy A. Golden, David L. Mcdaniel, Gregory A. Nunley, Winfred D. Crank
New Records For The Distribution Of An Unusual Liverwort, Petalophyllum Ralfsii (Fossombroniaceae), Daniel L. Marsh, Timothy A. Golden, David L. Mcdaniel, Gregory A. Nunley, Winfred D. Crank
Journal of the Arkansas Academy of Science
No abstract provided.
Reductive Dechlorinatin Of A 2-Chloronicotinic Acid Under Finkelstein Conditions, Frank L. Setliff, Leslie B. Coop
Reductive Dechlorinatin Of A 2-Chloronicotinic Acid Under Finkelstein Conditions, Frank L. Setliff, Leslie B. Coop
Journal of the Arkansas Academy of Science
No abstract provided.
Swimming Behavior In The Fox Squirrel, Sciurus Niger (Rodentia: Sciuridae), From Northeastern Arkansas, Stanley E. Trauth, David H. Jamieson
Swimming Behavior In The Fox Squirrel, Sciurus Niger (Rodentia: Sciuridae), From Northeastern Arkansas, Stanley E. Trauth, David H. Jamieson
Journal of the Arkansas Academy of Science
No abstract provided.
Separating K+/- From Pi+/- Using In-Flight Decays To Mu+/- + Nu, Wilfred J. Braithwaite, Edwin S. Braithwaite
Separating K+/- From Pi+/- Using In-Flight Decays To Mu+/- + Nu, Wilfred J. Braithwaite, Edwin S. Braithwaite
Journal of the Arkansas Academy of Science
A method is presented for completely distinguishing between charged kaons and charged pions by using their charged muon (plus neutrino) decays (with neutrinos undetected) for meson laboratory momenta up to 1000 MeV/c. When either a charged kaon or a charged pion decays into a muon and a neutrino, momentum-energy (four-momentum) conservation will be used to provide unique "kinematic trajectories" for distinguishing kaon decays from pion decays when the change in three-momentum of the muon from that of either parent kaon or pion is measured (or simulated). Ina magnetic field, observation of a tracked particle showing a "kink" and/or a change …
Coplanarity Test For Selecting A Pair Of Charged-Particle Tracks Resulting From A Single Neutral-Particle Decay, Edwin S. Braithwaite, Wilfred J. Braithwaite
Coplanarity Test For Selecting A Pair Of Charged-Particle Tracks Resulting From A Single Neutral-Particle Decay, Edwin S. Braithwaite, Wilfred J. Braithwaite
Journal of the Arkansas Academy of Science
It is hard to determine directly the position of a neutral subatomic particle, but when such a particle decays into a pair of charged particles, it is easy to determine the positions of the charged decay particles and thereby infer the position of the parent particle at the time of its decay. A minimum of two coordinate points for each of the two decay particles is needed to reconstruct the position of the parent vertex. The mathematics of the reconstruction process is inherently interesting, and it can be used to demonstrate to students the utility of some of the most …
81st Annual Meeting, 1997. Program, Academy Editors
81st Annual Meeting, 1997. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Effect Of Media Constituents On In Vitro Culturing Of Cowpea (Vigna Unguiculata) Shoot Tip And Leaf Disk Explants, Mohanjeet S. Brar, Edwin J. Anderson, Teddy E. Morelock, Ronald W. Mcnew
Effect Of Media Constituents On In Vitro Culturing Of Cowpea (Vigna Unguiculata) Shoot Tip And Leaf Disk Explants, Mohanjeet S. Brar, Edwin J. Anderson, Teddy E. Morelock, Ronald W. Mcnew
Journal of the Arkansas Academy of Science
Cowpea is an important legume food crop that is commonly grown in Arkansas and numerous other southern states. The application of biotechnological approaches for the improvement of U.S. cowpea genotypes is currently not possible due to the lack of a regeneration and transformation system. Therefore, the first priority of our research efforts is the development of a plant regeneration system that will facilitate plant transformation studies. In an effort to optimize the media requirements for tissue culturing cowpea, we evaluated the in vitro response of shoot tip and leaf disk explants to various levels of Murashige and Skoog (MS) macro …
Electron Shock Waves: Effect Of Current On Electron Temperature And Density, Mostafa Hemmati, Mathues Shane Doss
Electron Shock Waves: Effect Of Current On Electron Temperature And Density, Mostafa Hemmati, Mathues Shane Doss
Journal of the Arkansas Academy of Science
In our attempt to find analytical solutions for breakdown waves, we employ a set of three-component fluid equations. In addition to reporting the method of integration of electron fluid dynamical equations through the dynamical transition region (sheath region), the wave profile for ionization rate, electron number density and electron temperature inside the sheath will be discussed. Also, the effect of the current on electron temperature, electron number density and ionization rate will be reported.
Journal Of The Arkansas Academy Of Science - Volume 51 1997, Academy Editors
Journal Of The Arkansas Academy Of Science - Volume 51 1997, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Comparison Of Waterbird Utilization Of Two Northwest Arkansas Reservoirs, Jefferey T. Briggler, Robert C. Dobbs
Comparison Of Waterbird Utilization Of Two Northwest Arkansas Reservoirs, Jefferey T. Briggler, Robert C. Dobbs
Journal of the Arkansas Academy of Science
Waterbird use of two moderately-sized reservoirs in northwest Arkansas was studied in the autumns of 1993 and 1995. In addition to waterbird counts; surface area, water temperature, conductivity, pH, turbidity, dissolved oxygen, macrophyte presences, number of total macroin vertebrates and degree of human activity were evaluated. Lake Fayetteville supported a greater overall waterbird species richness and species abundance than Lake Wedington. The observed number of ducks per hectare showed a significant difference between the lakes in both 1993 and 1995. Surface feeding birds were significantly more abundant at Lake Fayetteville in both 1993 and 1995, whereas diving birds, which feed …
Variability In Forest Floor Mass And Nutrient Concentration Of Mature Pine-Hardwoods In The Ouachita Mountains, Hal O. Liechty, Michael G. Shelton, Edwin R. Lawson
Variability In Forest Floor Mass And Nutrient Concentration Of Mature Pine-Hardwoods In The Ouachita Mountains, Hal O. Liechty, Michael G. Shelton, Edwin R. Lawson
Journal of the Arkansas Academy of Science
Prior to timber harvesting, forest floor mass and nutrient concentrations in forest floor and mineral soil were determined in 24 mature, shortleaf pine (Pinus echinata Mill.)-hardwood stands occurring within the northern, eastern, southern and western sub-ecoregions of the Ouachita Mountains. The forest floor samples were collected at each of three locations representing the lower, mid, and upper slope positions within each stand. Samples of the L-(litter) and F-layers (fermentation) were collected separately. Materials from the L-layer were differentiated into hardwood foliage, pine foliage, and woody/reproductive components. Mass and nutrient concentrations of the various forest floor components were compared among slope …
Skeletochronological Study Of Adult Spiny Softshell Turtles (Apalone Spinifera) From Northeastern Arkansas, Stanley E. Trauth, Hilary J. Worley
Skeletochronological Study Of Adult Spiny Softshell Turtles (Apalone Spinifera) From Northeastern Arkansas, Stanley E. Trauth, Hilary J. Worley
Journal of the Arkansas Academy of Science
Skeletochronological techniques were used to examine age and growth in adult spiny softshell turtles {Apalone spiniferd) from northeastern Arkansas. The diaphyseal region offemurs of 24 specimens (8 mars mars; 16 venus venus) was excised, decalcified in weak hydrochloric acid, and histologically prepared for light microscopy. Skeletal growth was determined from histosectioned bones by measuring femur diameters as well as by counting lines of arrested growth (LAGs) that appear between distinct periosteal layers (marks of skeletal growth =MSGs) laid down during a single growing season. Although significant positive correlations were found between carapace length (CL) and femur diameter in both males …
Survey Of Mollusca (Bivalva: Unionacea) Inhabiting Myatt Creek, Fulton County, Arkansas, Chris L. Davidson, George L. Harp, John L. Harris
Survey Of Mollusca (Bivalva: Unionacea) Inhabiting Myatt Creek, Fulton County, Arkansas, Chris L. Davidson, George L. Harp, John L. Harris
Journal of the Arkansas Academy of Science
No abstract provided.
First Records For The Blackmask Racer (Coluber Constrictor Latrunculus) In Eastern Arkansas, Stanley E. Trauth
First Records For The Blackmask Racer (Coluber Constrictor Latrunculus) In Eastern Arkansas, Stanley E. Trauth
Journal of the Arkansas Academy of Science
The presence of the blackmask racer (Coluber constrictor latrunculus) in eastern Arkansas was first demonstrated by examination of a series of color slides of live specimens now preserved and deposited in the Arkansas State University Museum of herpetology. Adult color pattern is of paramount importance in the definition of subspecies of C. constrictor, and this is especially true for C. c. latrunculus. This subspecies is characterized by a conspicuous black stripe that extends from the postnasal, through the eye and onto the temporals or anterior dorsal scales. The dorsum is slate gray, and the venter is a pale grayish blue. …
Floristic Survey And Annotated Checklist Of The Pine Bluff Arsenal, Stephen A. Walker, Julian Campbell
Floristic Survey And Annotated Checklist Of The Pine Bluff Arsenal, Stephen A. Walker, Julian Campbell
Journal of the Arkansas Academy of Science
We conducted a floristic survey of the Pine Bluff Arsenal during the spring, summer, and fall of 1996. In total, 622 taxa representing 113 families and 351 genera were identified and compiled into an annotated checklist. The largest families were Asteraceae (79 genera), Poaceae (73 genera). Fabaceae (41 genera), and Cyperaceae (38 genera). Exotic species composed only 8.5% of the flora. Fifty-five of the specimens represent new records for Jefferson County.
Hydrogeological And Hydrochemical Connection Between The Decatur City Spring And Crystal Lake, Benton County, Arkansas, Demetra O. Salisbury, Ralph K. Davis
Hydrogeological And Hydrochemical Connection Between The Decatur City Spring And Crystal Lake, Benton County, Arkansas, Demetra O. Salisbury, Ralph K. Davis
Journal of the Arkansas Academy of Science
Arkansas is ranked nationally in the production of broilers, laying hens, turkey, swine and beef cattle. These animals produce large volumes of waste, which are spread on pasture land as a method of disposal, as well as a source of fertilizer, resulting in nonpoint source contamination of surface water and ground water. One area of concern includes the Decatur City Spring, which provides municipal water for the city of Decatur. A total of eight sites in the surrounding area were monitored routinely for water quality parameters, including pH, specific conductance, and nitrate-nitrogen. Water temperature and spring and lake stage were …
Integrating Gis And Remote Sensing With Ecosystem Research, Suzanne Wiley, Robert C. Weih Jr.
Integrating Gis And Remote Sensing With Ecosystem Research, Suzanne Wiley, Robert C. Weih Jr.
Journal of the Arkansas Academy of Science
In the Phase II Ecosystem Management Research Program in the Ouachita and Ozark National Forests, an interdisciplinary group of scientists are evaluating the effects and trade-offs of partial cutting methods in a replicated stand level study. Information from approximately 2,000 plots is being collected by more than fifty researchers during this five-year project with plans to continue data collection long term. To evaluate the effects of different management strategies and their interactions with forest resources, data must be brought into a common format and made available to all researchers. To this end, a data support system was developed which utilizes …