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Articles 6391 - 6420 of 7186
Full-Text Articles in Entire DC Network
Maternity Colony Of Gray Bats In A Non-Cave Site, Lorraine Timmerman, V. Rick Mcdaniel
Maternity Colony Of Gray Bats In A Non-Cave Site, Lorraine Timmerman, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Development Of A Variable Wavelength Flame Infrared Emission Gas Chromatography Detector, Weiqun Zhang, M. Keith Hudson, Mokhtar Mofidi
Development Of A Variable Wavelength Flame Infrared Emission Gas Chromatography Detector, Weiqun Zhang, M. Keith Hudson, Mokhtar Mofidi
Journal of the Arkansas Academy of Science
No abstract provided.
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.
Table Of Contents, Academy Editors
Table Of Contents, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
In Memoriam: Herman L. Bogan, 1907 - 1992, James H. Fribourgh
In Memoriam: Herman L. Bogan, 1907 - 1992, James H. Fribourgh
Journal of the Arkansas Academy of Science
No abstract provided.
Optimum Cone Collection Period In Arkansas For Establishing In Vitro Cultures Of Loblolly Pine (Pinus Taeda L.), Jameel M. Al-Khayri, Feng H. Huang, H. T. Zhang
Optimum Cone Collection Period In Arkansas For Establishing In Vitro Cultures Of Loblolly Pine (Pinus Taeda L.), Jameel M. Al-Khayri, Feng H. Huang, H. T. Zhang
Journal of the Arkansas Academy of Science
This study was conducted to determine the optimum period to collect loblolly pine (Pinus taeda L.) cones that contain embryos with the greatest capacity to produce embryogenic callus for establishing somatic embryogenesis. Cones were collected from trees at the University of Arkansas Agricultural Experiment Station, Fayetteville, in 1991 during four consecutive months: May, June, July, and August. Seeds were extracted and disinfected in 70% ethanol for 1 min, 50% Clorox for 20 min, followed by four water rinses. Seed coats were removed, and embryos were cultured on DCR medium adjusted to pH 5.7 and supplemented with 3 mg/L 2,4-D, 0.5 …
Using Physical, Chemical And Biological Indicators To Assess Water Quality On The Ouachita National Forest Utilizing Basin Area Stream Survey Methods, J. Alan Clingenpeel, Betty G. Cochran
Using Physical, Chemical And Biological Indicators To Assess Water Quality On The Ouachita National Forest Utilizing Basin Area Stream Survey Methods, J. Alan Clingenpeel, Betty G. Cochran
Journal of the Arkansas Academy of Science
The Ouachita National Forest (ONF) has developed a series of Best Management Practices (BMP's) designed to protect water quality and associated beneficial uses (fisheries, municipal water supplies, etc.). A monitoring program is necessary to document the effectiveness of that protection. The Basin Area Stream Survey (BASS) methodology provides a monitoring link from BMP's to the aquatic ecosystems. The goal of BASS is to identify the physical, chemical and biological characteristics of a stream in a format that will allow comparisons with other streams, and indicate when a stream is being impacted. Six index streams within two ecoregions were selected and …
Books And Letters Vol. 5, No. 2, University Libraries, John A. Harrison, Anne Marie Candido, Michael J. Dabrishus, Juana R. Young, Ellen C. Shipley, Ann S. Waligorski, Don Batson, Mara E. Dabrishus
Books And Letters Vol. 5, No. 2, University Libraries, John A. Harrison, Anne Marie Candido, Michael J. Dabrishus, Juana R. Young, Ellen C. Shipley, Ann S. Waligorski, Don Batson, Mara E. Dabrishus
Books and Letters
Library Celebrates Old Main; Director's Column; Books: Selection and Ordering; Library Hosts Lithuanian Visitor; Personnel Notes; Student Assistants: What Would We Do Without Them?
Evaluation Of Water Quality Data - Beaver Lake - Section Iv Through Table Xli, (Part Ii), James W. Moore
Evaluation Of Water Quality Data - Beaver Lake - Section Iv Through Table Xli, (Part Ii), James W. Moore
Arkansas Water Resources Center Technical Reports
No abstract provided.
Oklahoma State University And University Of Arkansas, Fayetteville Cooperative Report On Evaluation And Assessment Factors Affecting Water Quality Of The Illinois River In Arkansas, Richard L. Meyer, Art V. Brown, David G. Parker
Oklahoma State University And University Of Arkansas, Fayetteville Cooperative Report On Evaluation And Assessment Factors Affecting Water Quality Of The Illinois River In Arkansas, Richard L. Meyer, Art V. Brown, David G. Parker
Arkansas Water Resources Center Technical Reports
No abstract provided.
The Aquatic Macroinvertebrates Of The White River National Wildlife Refuge, Steve W. Chordas Iii, George L. Harp
The Aquatic Macroinvertebrates Of The White River National Wildlife Refuge, Steve W. Chordas Iii, George L. Harp
Arkansas Water Resources Center Technical Reports
The primary purpose of this study was to survey the diversity of the aquatic macroinvertebrates of the White River National Wildlife Refuge (WRNWR). Determining relative abundance and distributional and seasonal patterns were secondary objectives. No comprehensive investigations of the WRNWR aquatic macroinvertebrates had been conducted previously, and it was hypothesized that this relatively undisturbed area may serve as a refugium. Further, this study provides base line data by which management programs can be composed. Thirty sampling stations were established within the WRNWR. Samples were collected from north to south at a basic rate of five stations per month. Revisit collections …
Water Quality As Affected By Pesticides In Rice Production, W. G. Johnson, T. L. Lavy, J. D. Mattice, B. W. Skulman, R. E. Talbert, R. J. Smith
Water Quality As Affected By Pesticides In Rice Production, W. G. Johnson, T. L. Lavy, J. D. Mattice, B. W. Skulman, R. E. Talbert, R. J. Smith
Arkansas Water Resources Center Technical Reports
Studies were conducted to determine the environmental persistence of the rice pesticides triclopyr, 2,4-D, benomyl and quinclorac. Triclopyr half-lives ranged from <7 d to >100 d depending on depth within the soil profile and clay content. Triclopyr persistence increased as depth within the profile increased and clay content increased. The benomyl metabolite MBC was present at greater than 50% of the initial amount after 9 months in the field. In simulated carryover field studies quinclorac exhibited the greatest potential for injury to subsequent rotational crops. Cotton and soybean growth was reduced when planted at four weeks after quinclorac application. The adsorption of triclopyr …
Determination Of The Abient Toxicity Of The Tailwater Of Nimrod Lake, John T. Knight
Determination Of The Abient Toxicity Of The Tailwater Of Nimrod Lake, John T. Knight
Arkansas Water Resources Center Technical Reports
The objective of this research was to determine if ambient toxicity exists in the receiving stream below a reservoir in which water from the hypolimnion is released. The Ceriodaphnia 7-day test was utilized to determine if toxicity existed. This test is routinely used in the monitoring of municipal and industrial effluent. It has also been utilized in determining if ambient toxicity exists within receiving streams. Nimrod Lake is a flood control impoundment on the Fourche LaFave River in west central Arkansas. The literature suggest that during stratification the hypolimnetic release contains high levels of iron, manganese, ammonia and sulfide during …
Proceedings Of The Arkansas Academy Of Science - Volume 45 1991, Academy Editors
Proceedings Of The Arkansas Academy Of Science - Volume 45 1991, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Evaluation Of Particulate Air Filters For Indoor Air Cleaning, Murray R. Clark, Kevin Tennal, Thomas Rimmer, Malay K. Mazumder
Evaluation Of Particulate Air Filters For Indoor Air Cleaning, Murray R. Clark, Kevin Tennal, Thomas Rimmer, Malay K. Mazumder
Journal of the Arkansas Academy of Science
No abstract provided.
Vascular Flora Of Perry County, Arkansas; A Progress Report, Donald E. Culwell
Vascular Flora Of Perry County, Arkansas; A Progress Report, Donald E. Culwell
Journal of the Arkansas Academy of Science
No abstract provided.
Synopsis Of The Notonectidae Of Arkansas, Stephen W. Chordas Iii, George L. Harp
Synopsis Of The Notonectidae Of Arkansas, Stephen W. Chordas Iii, George L. Harp
Journal of the Arkansas Academy of Science
No abstract provided.
Bacteremia Associated With Mortality In An Arkansas Alligator, James J. Daly, Sam W. Barkley, Peggy Benton
Bacteremia Associated With Mortality In An Arkansas Alligator, James J. Daly, Sam W. Barkley, Peggy Benton
Journal of the Arkansas Academy of Science
No abstract provided.
Landowner Reports Of Deer Hunter Damage In Arkansas, Richard A. Kluender, T. Bentley Wigley Jr.
Landowner Reports Of Deer Hunter Damage In Arkansas, Richard A. Kluender, T. Bentley Wigley Jr.
Journal of the Arkansas Academy of Science
Damage to property from deer hunters, though usually not discovered immediately, is a problem for many Arkansans. A questionnaire survey was mailed to 3,773 rural landowners in Arkansas to determine the type and cost of damage suffered from hunters. Thirty-five percent reported minor problems, and 15% reported severe damage from hunters. The most common problems caused by hunters were fence cutting (33%), severe littering (16%), road damage (13%), crop damage (10%), cattle shot (8%), gates left open (6%), and trespassing (6%). Eighty-three (5%) of the landowners reported damage costs of $500 or more; one sustained a $15,000 loss. Total state-wide …
Photoreactivation Of Uv-Induced Damage In G1 Phase Xenopus Cells That Leads To A Sister Chromatid Exchanged And Cell Death, Dawn Laswell, Jennifer Barber, H. Gaston Griggs
Photoreactivation Of Uv-Induced Damage In G1 Phase Xenopus Cells That Leads To A Sister Chromatid Exchanged And Cell Death, Dawn Laswell, Jennifer Barber, H. Gaston Griggs
Journal of the Arkansas Academy of Science
Experiments were conducted with the A87 Xenopus tissue culture cell line which centered on use of the line's efficient photoreactivation (PR) mechanism to: (1) determine the extent to which sister chromatid exchanges (SCEs), induced by exposing early G1 phase cells to low UV fluenced, are photoreactivable, and (2) determine the extent to which the photoreactivable SCEs resulting from these low UV fluences constitute lethal lesions. For the first determination, UV fluences - SCE frequency relations and UV fluence + PR fluence - SCE frequency relations were established for UV fluences in the range 0-12 J/m2 and a single PR fluence …
Observations On The Natural History Of The Mediterranean Gecko, Hemidactylus Turcicus (Sauria: Gekkonidae) In Northwest Arkansas, Mark A. Paulissen, Thomas M. Buchanan
Observations On The Natural History Of The Mediterranean Gecko, Hemidactylus Turcicus (Sauria: Gekkonidae) In Northwest Arkansas, Mark A. Paulissen, Thomas M. Buchanan
Journal of the Arkansas Academy of Science
The Mediterranean gecko, Hemidactylus turcicus, is a small nocturnal lizard introduced into the U.S. A stable population on the campus of Westark Community College in Fort Smith, Sebastian County, Arkansas represents the northernmost U.S. population presently known. We report data on microhabitat usage, feeding behavior, reproduction, and activity patterns. This gecko is active on the outside of buildings during warm months of the year and occasionally inside buildings during the winter. It is most abundant on buildings with many crevices that are used as daytime retreats. It avoids direct illumination of artificial light and usually perches at heights greater than …
Distribution And Habitat Of Utilization Of The Four-Toed Salamander, Hemidactylium Scutatum, In The Ouachita Mountains Of Arkansas, David A. Saugey, Stanley E. Trauth
Distribution And Habitat Of Utilization Of The Four-Toed Salamander, Hemidactylium Scutatum, In The Ouachita Mountains Of Arkansas, David A. Saugey, Stanley E. Trauth
Journal of the Arkansas Academy of Science
Four-toed salamanders in Arkansas represent a disjunct population separated from their main range in the eastern United States and Canada. Until recently, the distribution of this species was documented by a few individual specimens collected or observed from widely spaced localities which has resulted in its being considered rare and vulnerable. Recent investigations of distribution and habitat utilization indicate this species may be more common than previously believed, but also reaffirms the need to protect riparian habitat, springs, ponds, woodland seeps and other preferred, moist habitats containing mossy areas used as primary egg deposition sites.
Five-Year Study Of Geocarpon Minimum At Warren Prairie Natural Area Bradley County, Arkansas, William M. Shepherd, Charles R. Preston, Robert Steinauer
Five-Year Study Of Geocarpon Minimum At Warren Prairie Natural Area Bradley County, Arkansas, William M. Shepherd, Charles R. Preston, Robert Steinauer
Journal of the Arkansas Academy of Science
Geocarpon minimum, listed by the U.S. Fish & Wildlife Service as threatened, was monitored at Warren Prairie Natural Area, Bradley County, Arkansas, 1986-90. Selected environmental variables were compared with Geocarpon productivity plot by plot. Principal components (PC) analysis generated two eigenvectors that jointly accounted for 30% of the variation among plots. PC-l describes an exposure gradient; high-productivity plots had less litter and grass cover, more cryptogamic lip, and more iron nodules lying on the surface than most other plots. PC-II was more useful for separating highly productive plots from all other plots; the highly productive plots lay in close proximity …
75th Annual Meeting, 1991. Program, Academy Editors
75th Annual Meeting, 1991. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Biota Of Magazine Mountain (I): An Outline Of The Natural History Of Magazine Mountain, Robert T. Allen
Biota Of Magazine Mountain (I): An Outline Of The Natural History Of Magazine Mountain, Robert T. Allen
Journal of the Arkansas Academy of Science
One plant and five invertebrate species are thought to be endemic to Magazine Mountain, Logan County, Arkansas. The mountain is the highest point in the Interior Highlands reaching 2,753 feet. Previous studies have recorded over 650 species of plants including (or in addition to) 27 fern species. The animal fauna is less well known. It is suggested that an inventory of the biota of the mountain could be completed within the foreseeable future. It is further suggested that such an inventory would be useful in answering questions relevant to understanding the evolution and biogeography of selected taxa in North America. …
75 Annual Meeting, 1991. Secretary's Report And Financial Statement, Academy Editors
75 Annual Meeting, 1991. Secretary's Report And Financial Statement, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Reported Animal Rabies In Arkansas: 1982-1990, Gary A. Heidt, David A. Saugey, Laura Chandler, Karen D. Stone
Reported Animal Rabies In Arkansas: 1982-1990, Gary A. Heidt, David A. Saugey, Laura Chandler, Karen D. Stone
Journal of the Arkansas Academy of Science
Reported animal rabies in Arkansas is reviewed for the years 1982-1990; providing an update from 1950-1981 (Heidt, 1982). Total cases ranged from 39 in 1990 to 168 in 1986, with a mean of 123.1. Wildlife accounted for 93.4% of the total cases. A total of 16 kinds of mammals has been implicated in reported rabies (individual species of foxes and skunks have been combined). The four taxa accounting for the highest incidence are: skunks (82.6%); bats (10.1%, all seven species combined); cattle (2.8%); and dogs (1.5%). Skunks, the most prominent species, ranged from 71.8% in 1990 to 90.2% in 1987. …
Organochlorine Pesticide Concentrations In Various Species Of Migratory Passerines In Louisiana, Ragupathy Kannan
Organochlorine Pesticide Concentrations In Various Species Of Migratory Passerines In Louisiana, Ragupathy Kannan
Journal of the Arkansas Academy of Science
Twenty-four specimens of southbound migratory passerines comprising 13 species were collected in northeastern Louisiana during 1986, and were subjected to gas-chromatography analyses for organochlorine pesticide compounds. Eleven of the specimens analyzed (46%) were positive for pesticides. The compounds detected were in trace amounts ranging from 1.37 to 200.14 ppb. The data indicated a further decline in pesticide burdens in birds since the ban on DDT. It also supported the hypothesis that a post-mortem breakdown of DDT to DDE may occur in avian tissues. Itis hypothesized that northbound migrants may have higher pesticide burdens than fall migrants considering the continued usage …
Evaluation Of Aposphaeria Amaranthi As A Bioherbicide For Pigweed (Amaranthus Spp.), A. S. Mintz, G. J. Weidmann
Evaluation Of Aposphaeria Amaranthi As A Bioherbicide For Pigweed (Amaranthus Spp.), A. S. Mintz, G. J. Weidmann
Journal of the Arkansas Academy of Science
Studies were conducted to determine the potential of the fungus, Aposphaeria amaranth!, as a bioherbicide for pigweeds (Amaranthus spp.). Experiments to establish the environmental parameters necessary for control of tumble pigweed (A. albus) demonstrated that an 8-hr dew period was sufficient for control of seedlings with four to six leaves, and that temperatures ranging from 20 to 28 C were conducive for disease development. Conidial concentrations as lowas 1x 10s conidia per ml also were sufficient for plant mortality. Host range tests demonstrated pathogenicity of A. amaranthi to several other species of Amaranthus, including biotypes resistant to triazine herbicides. Disease …
Reproductive Performance Of Female White-Tailed Deer On Holla Bend National Wildlife Refuge, Thomas A. Nelson
Reproductive Performance Of Female White-Tailed Deer On Holla Bend National Wildlife Refuge, Thomas A. Nelson
Journal of the Arkansas Academy of Science
Aspects of the reproductive biology of female white-tailed deer (Odocoileus virginianus) on Holla Bend National Wildlife Refuge were investigated by examining the reproductive tracts of 121 deer harvested during the 1985-90 archery seasons. The presence of corpora albicantia in yearlings suggested that 27% of female fawns conceived, producing a mean of 1.0 ova/breeding fawn. Pregnancy rates among yearlings and adults averaged 94% and 97%, respectively. Ovulation rates averaged 1.4 and 2.0 ova/female among yearlings and adults. Some females were ovulating in early-October, but the earliest conceptions occurred during the last week of October. The peak breeding period for yearlings and …