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Articles 6571 - 6600 of 7181
Full-Text Articles in Entire DC Network
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.
Water Quality Management Strategies For Beaver Reservoir, Richard L. Meyer, W. Reed Green
Water Quality Management Strategies For Beaver Reservoir, Richard L. Meyer, W. Reed Green
Arkansas Water Resources Center Technical Reports
No abstract provided.
Population Trends Of The Loggerhead Shrike (Lanius Ludovicianus) In Arkansas, Fred L. Burnside Jr., William M. Shepherd
Population Trends Of The Loggerhead Shrike (Lanius Ludovicianus) In Arkansas, Fred L. Burnside Jr., William M. Shepherd
Journal of the Arkansas Academy of Science
No abstract provided.
Effects Of Growth Temperatures On The Fatty Acid Composition Of Isolated Chloroplasts From Two Species Differing In Heat Sensitivity, Roy Z. Gehring, Glenn W. Todd
Effects Of Growth Temperatures On The Fatty Acid Composition Of Isolated Chloroplasts From Two Species Differing In Heat Sensitivity, Roy Z. Gehring, Glenn W. Todd
Journal of the Arkansas Academy of Science
Lipid analyses of chloroplasts isolated from wheat (Triticum aestivum L. cv. Arthur) and milo (Sorghum bicolor cv. Funk's hybrid 522) suggest no major heat effect on lipid class distribution. Assuming milo is more heat tolerant than wheat and that increased saturated/unsaturated fatty acid values increase thermal stability, changes in sulfoquinovosyldiglyceride (SL) appear to be more important than phosphatidylglycerol (PG) in conferring thermal stability to isolated chloroplasts.
Effects Of Temperature And Crowding On The Pathogenicity Of Edwardsiella Ictaluri In Channel Catfish (Ictalurus Punctatus), Sharon L. Johnson, Lawrence W. Hinck
Effects Of Temperature And Crowding On The Pathogenicity Of Edwardsiella Ictaluri In Channel Catfish (Ictalurus Punctatus), Sharon L. Johnson, Lawrence W. Hinck
Journal of the Arkansas Academy of Science
Channel catfish were injected with Edwardsiella ictaluri and stocked at increasing temperatures and densities. Bacteriological examination of kidney, liver and spleen revealed the greatest numbers of organisms in fish from the highest temperature and stocking density tested. Survival time was the shortest for fish held at the highest temperature and stocking density. Increased temperature and crowding were directly proportional to the number of organisms recovered from the organs and inversely proportional to fish survival time.
Flow Reduction May Explain Sporadic Occurrence Of Craspedacusta Sowerbyi (Trachylina) Medusae, Peter P. Brussock, Lawrence D. Willis, Arthur V. Brown
Flow Reduction May Explain Sporadic Occurrence Of Craspedacusta Sowerbyi (Trachylina) Medusae, Peter P. Brussock, Lawrence D. Willis, Arthur V. Brown
Journal of the Arkansas Academy of Science
No abstract provided.
Notes On Three Palustrine Natural Community Types In The Arkansas Ozarks, Steve L. Orzell, William F. Pell, Gary E. Tucker
Notes On Three Palustrine Natural Community Types In The Arkansas Ozarks, Steve L. Orzell, William F. Pell, Gary E. Tucker
Journal of the Arkansas Academy of Science
No abstract provided.
69th Annual Meeting, 1985. Program, Academy Editors
69th Annual Meeting, 1985. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Dwight Munson Moore, 1891-1985, Gary E. Tucker, Gwen Barber
Dwight Munson Moore, 1891-1985, Gary E. Tucker, Gwen Barber
Journal of the Arkansas Academy of Science
No abstract provided.
Concanavalin A-Binding Enzymes Of Crotalus Scutulatus Scutulatus Venom, Michael W. Hinson, C. K. Childs, Bob D. Johnson, Dewey H. Sifford
Concanavalin A-Binding Enzymes Of Crotalus Scutulatus Scutulatus Venom, Michael W. Hinson, C. K. Childs, Bob D. Johnson, Dewey H. Sifford
Journal of the Arkansas Academy of Science
Crotalus scutulatus scutulatus crude venom was separated into two fractions by Concanavalin A Sepharose 4B affinity chromatography. The proteins binding to Con A exhibited phosphomonoesterase (orthophosphoric monoester phosphohydrolase EC 3.1.3.2), phosphodiesterase, 5'-nucleotidase (5'-ribonucleotide phosphohydrolase EC 3.1.3.5), phospholipase A(phosphatidate 2-acylhydrolase EC 3.1.1 .4), hyaluronidase (hyaluronate glycanohydrolase EC 3.2.1 d), N-benzoyl-L-arginine ethyl esterase, p-toluenesulfonyl-L-arginine methyl esterase, L-amino acid oxidase (L-amino acid: 02 oxidoreductase [deaminating] EC 1.4.3.2), and caseinolytic activities. Thrombin-like and NAD nucleosidase (5'-ribonucleotide phosphohydrolase EC 3.1.3.5) activities were not observed. The crude venom and the fraction containing the glycoproteins which bound to Con A were fractionated by DEAE Sephadex A-50 ion …
Heterogenity Of The Spawning Populations Of Surf Smelt In The State Of Washington, Raj V. Kilambi
Heterogenity Of The Spawning Populations Of Surf Smelt In The State Of Washington, Raj V. Kilambi
Journal of the Arkansas Academy of Science
Biometric comparisons of three spawning populations of surf smelt, one from Pacific Coast and two from Puget Sound, were made. The Puget Sound populations (Hood Canal and Utsaladdy) were more similar to each other compared to the ocean populations. The Hood Canal and Utsaladdy smelt exhibited least distance function, D^2 , and greater overlap of meristic characters compared to the Lapush fish. It was postulated that the Puget Sound smelt populations were derived from the ocean smelt some 13,000 or more years ago.
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Ii. Species Accounts, James H. Peck, Joseph D. Clark, Tiny Sheldon, Gary A. Heidt
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Ii. Species Accounts, James H. Peck, Joseph D. Clark, Tiny Sheldon, Gary A. Heidt
Journal of the Arkansas Academy of Science
Fur harvest records were maintained by the Arkansas Game and Fish Commission on the following 16 furbearers: badger, beaver, bobcat, eastern spotted skunk (civet), coyote, gray fox, long-tailed weasel, mink, muskrat, nutria, opossum, raccoon, red fox, red wolf, river otter, and striped skunk. These harvest records were analyzed for each species in terms of mean pelt price and numbers of pelt sold by region (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta) per year. Historical or biological influences important in interpreting species accounts are presented.
Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson
Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson
Journal of the Arkansas Academy of Science
Soil characteristics of the mineral surface soil (0-6 cm) on three small watersheds in the Ouachita Mountains of Arkansas from which the pine forests have been clearcut, crushed, and burned for site preparation were studied for the first two years following clearcutting and compared to soils from adjacent uncut pine forest watersheds. Following clearcutting and burning, soil pH was generally higher than in uncut forest soils. The greatest pH differences occurred within several months of burning and generally decreased through the end of the second year. Soil organic matter content was lower immediately following clearcutting and burning and increased to …
Fall Deer Food Selection In The Ouachita National Forest, James D. Fenwood, David A. Saugey, Carl A. Racchini
Fall Deer Food Selection In The Ouachita National Forest, James D. Fenwood, David A. Saugey, Carl A. Racchini
Journal of the Arkansas Academy of Science
No abstract provided.
Synopsis Of The Hydrometridae Of Arkansas, George L. Harp
Synopsis Of The Hydrometridae Of Arkansas, George L. Harp
Journal of the Arkansas Academy of Science
No abstract provided.
Distribution And Status Of Etheostoma Cragini Gilbert And E. Microperca Jordan And Gilbert In Arkansas, John L. Harris, Kenneth L. Smith
Distribution And Status Of Etheostoma Cragini Gilbert And E. Microperca Jordan And Gilbert In Arkansas, John L. Harris, Kenneth L. Smith
Journal of the Arkansas Academy of Science
No abstract provided.
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Iii. Harvest-Price Relationships, Joseph D. Clark, Gary A. Heidt, Tina Sheldon, James H. Peck
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Iii. Harvest-Price Relationships, Joseph D. Clark, Gary A. Heidt, Tina Sheldon, James H. Peck
Journal of the Arkansas Academy of Science
Correlation and linear regression analyses between mean annual pelt price and total harvest of 13 Arkansas furbearer species between 1965 and 1983 were performed for state and regions (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta). Statewide, strong correlations (r > 0.80) were identified for bobcat (Felis rufus), coyote (Canis latrans), gray fox (Urocyon cinereoargenteus), mink (Mustela vison), nutria (Myocastor coypus), opossum (Didelphis virginiana), and raccoon (Procyonlotor). Moderate correlations (r = 0.55 - 0.79) were identified for eastern spotted skunk (Spilogale putorius), muskrat (Ondatra zibethicus), river otter (Lutra canadensis), and striped skunk (Mephitis mephitis). Nonsignificant correlations (r < 0.468) were shown for beaver (Castor canadensis) and long-tailed weasel (Mustela frenata). Regional differences were noted for each species.
Watershed Land Uses And Phosphorus Export Coefficient Relationships: A Planning Tool For Lake Resources Management, Carl R. Stapleton
Watershed Land Uses And Phosphorus Export Coefficient Relationships: A Planning Tool For Lake Resources Management, Carl R. Stapleton
Journal of the Arkansas Academy of Science
Relationships between nonpoint source pollutant loadings and water quality degradation in lakes have been established. However, practical methodologies necessary to identify and manage nonpoint sources in accordance with lake water quality indices have been lacking. Objectives of the current study were as follows: (1) to compare predicted model values for in-lake total phosphorus (TP) concentrations with actual values; and (2) to determine the applicability of areal phosphorus loading models for lake resources management. The research site was located 19 km west of the City of Little Rock in the Lake Maumelle basin. Areal total phosphorus (TP) loadings in g m^-2yr^-1 …
69th Annual Meeting, 1985. Secretary's Report And Financial Statement, Academy Editors
69th Annual Meeting, 1985. Secretary's Report And Financial Statement, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Comparative Study Of Lactate Dehydrogenase Activity In Diving And Nondiving Reptiles, Dennis A. Baeyens, Deborah Bursey, Robert Rountree
Comparative Study Of Lactate Dehydrogenase Activity In Diving And Nondiving Reptiles, Dennis A. Baeyens, Deborah Bursey, Robert Rountree
Journal of the Arkansas Academy of Science
The properties of lactate dehydrogenase (LDH) were examined in two snake species and one turtle species. The snakes used in the study were the semi-aquatic Nerodia rhombifera and the terrestrial Elaphe obsoleta, while Pseudemys scripta represented the turtle species. Our purpose was to compare the LDH activity of nondiving reptiles (Nerodia and Elaphe) with that of the well established diver Pseudemys. The kinetic properties of LDH and its susceptibility to inhibition by elevated pyruvate concentrations were investigated in the brain and heart of the three species. Brain and heart were chosen because they are highly aerobic tissues and therefore should …
Proceedings Of The Arkansas Academy Of Science - Volume 39 1985, Academy Editors
Proceedings Of The Arkansas Academy Of Science - Volume 39 1985, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Effects Of Litter On Aquatic Macrophyte Germination And Growth, Mark F. Carter, Forrest E. Lane, James B. Grace
Effects Of Litter On Aquatic Macrophyte Germination And Growth, Mark F. Carter, Forrest E. Lane, James B. Grace
Journal of the Arkansas Academy of Science
In Arkansas, during seasonal drought periods, lake water levels drop leaving exposed mudflats which are primary sites for seedling establishment. Commonly, these exposed mudflats are partially covered with decomposing litter from previous stands of aquatic plants. In this study, aqueous leachates from the litter of four macrophytes, Eleocharis quadrangulata, Justicia americana, Polygonum lapathifolium, and Potamogeton nodosus, were used to test for chemical interference with germination and seedling growth. Only Justicia americana leachate was found to affect the growth of several of the test species. The potential for chemical interference by Justicia litter was evaluated further using extracts of acidified leachate. …
Repair Of Lethal Damage Induced In A Hamster X Amphibian Hybrid Tissue Culture Cell Line By Ultraviolet Light And Gamma Ray, Susan Kulp, Ann Page, H. Gaston Griggs
Repair Of Lethal Damage Induced In A Hamster X Amphibian Hybrid Tissue Culture Cell Line By Ultraviolet Light And Gamma Ray, Susan Kulp, Ann Page, H. Gaston Griggs
Journal of the Arkansas Academy of Science
A hybrid cell line was formed by fusing cells from two established vertebrate tissue culture cell lines (V79B1 hamster and A84 Xenopus), which were known to differ substantially in resistance to some radiation-induced lesions and in associated repair potential. Ultraviolet and gamma ray dose-survival relations were then determined and analyzed for the three cell lines, primarily to compare the radiosensitivity (Do dose) of the hybrid line with that of each parental line for each radiation. Further experimentation was conducted to determine the extent to which observed differences in these Do doses could be attributed to interactions of the combined parental …
Methemoglobin Reduction In The Presence Of Various Concentrations Of Oxyhemoglobin, Ali Mansouri
Methemoglobin Reduction In The Presence Of Various Concentrations Of Oxyhemoglobin, Ali Mansouri
Journal of the Arkansas Academy of Science
Methemoglobin reduction in human red blood cell is governed by many factors, one of which is the concentration of oxyhemoglobin. Experiments were conducted to determine the inhibition of methemoglobin reduction by oxyhemoglobin under concentrations approaching those in the red cell. Hemoglobin, methemoglobin reductase and cytochrome b₅ were prepared by routine protein purification methods. Methemoglobin reduction was carried out at 37° C in spectrophotometer. It is shown that methemoglobin concentration variation (at least when it is above 1 mM) does not change the reduction rate. Whereas, the ratio of methemoglobin to oxyhemoglobin determines the rate of methemoglobin reduction when all other …
Analysis Of Arkansas Fur Harvest Records - 1942-1984: I. State And Regional Accounts, Gary A. Heidt, James H. Peck, Tiny Sheldon, Joseph D. Clark
Analysis Of Arkansas Fur Harvest Records - 1942-1984: I. State And Regional Accounts, Gary A. Heidt, James H. Peck, Tiny Sheldon, Joseph D. Clark
Journal of the Arkansas Academy of Science
Fur harvest records maintained by the Arkansas Game and Fish Commission from 1942-1984 summarized the number of pelts sold by region (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta) and the average price per pelt for 16 furbearers. Analysis of these records showed that in the 1979-80 trapping season (the record year for both harvest and value both in Arkansas and the nation), the value of the Arkansas fur harvest ranked 14th nationally (2.12% of total national value). Fur harvests in Arkansas were high in the 1940's, declined in the 1950's and 1960's and then experienced a rapid …
Model To Predict Arkansas Gray Fox Fur Harvests, James H. Peck, Gary A. Heidt
Model To Predict Arkansas Gray Fox Fur Harvests, James H. Peck, Gary A. Heidt
Journal of the Arkansas Academy of Science
Linear regression analysis of total gray fox (Urocyon cinereoargenteus) fur harvests from 1954-1983 in Arkansas showed a high correlation with mean pelt values (r = 0.956). Single variable models using linear regression analyses of current season's pelt values (CSPV) and previous season's pelt values (PSPV) were designed to predict fur harvests. These models demonstrated high correlations for predicting harvests (r = 0.933 and r = 0.893 respectively). Regional analyses revealed a high correlation between mean pelt values and harvest for the Ozark Mountain region (r = 0.923), Ouachita Mountain region (r = 0.971 ), and Gulf Coastal Plain (r = …
Fluctuations And Relationships Of Selected Physiochemical Parameters In Dardanelle Reservoir, Arkansas, 1975-1982, John D. Rickett, Robert L. Watson
Fluctuations And Relationships Of Selected Physiochemical Parameters In Dardanelle Reservoir, Arkansas, 1975-1982, John D. Rickett, Robert L. Watson
Journal of the Arkansas Academy of Science
Annual and seasonal fluctuations and relationships are described for discharge, turbidity, chloride, total hardness, conductivity and suspended solids over an eight-year period in Dardanelle Reservoir. The parameters fluctuated rather widely primarily in response to seasonal patterns of rainfall. Chloride and conductivity were related and generally fluctuated together as did turbidity and suspended solids. Hardness appeared to vary independently of the others prior to 1979 then varied more closely with chloride after March 1979. Inherent differences between the Illinois Bayou arm and the main Arkansas River sections complicated the precise identification of any overall impact of power plant operation. No significant …
Age And Growth Of The Bluegill Lepomis Macrochrius Rafinesque From An Unmanaged Watershed Lake In Northeast Arkansas With Observations On Lake Ecology, Stephen A. Sewell
Age And Growth Of The Bluegill Lepomis Macrochrius Rafinesque From An Unmanaged Watershed Lake In Northeast Arkansas With Observations On Lake Ecology, Stephen A. Sewell
Journal of the Arkansas Academy of Science
Age and growth data were compiled on 114 bluegill, Lepomis macrochirus Rafinesque, taken from floodwater retarding structure #15 of the Big Creek Watershed project in Craighead and Greene counties of northeast Arkansas. This project was completed in the early 1960's by USDA-SCS. The 73 surface acre lake has not been managed for fish production and has been subjected to unscheduled water level manipulations during dry weather periods. These manipulations have maintained the bluegill population in healthy condition. The oldest bluegill collected were age class IV+. Average condition coefficient K(TL)declined from oldest to youngest individuals (2.96 in age class IV+ - …
Synopsis Of The Nepidae Of Arkansas, George L. Harp
Synopsis Of The Nepidae Of Arkansas, George L. Harp
Journal of the Arkansas Academy of Science
No abstract provided.
Further Distributional Records For Arkansas Anisoptera, George L. Harp, John D. Rickett
Further Distributional Records For Arkansas Anisoptera, George L. Harp, John D. Rickett
Journal of the Arkansas Academy of Science
No abstract provided.