Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Relative Abundance, Seasonal Distribution And Taxonomy Of Sphingidae Of Northeast Arkansas, Charles L. Selman, Harvey E. Barton
Relative Abundance, Seasonal Distribution And Taxonomy Of Sphingidae Of Northeast Arkansas, Charles L. Selman, Harvey E. Barton
Journal of the Arkansas Academy of Science
A total of 38 species of sphingids, with keys and descriptions, are reported from Northeast Arkansas. Graphs and tables are presented to show relative abundance and seasonal distribution. Drawings of genitalia, fore tibiae, and forewings, as well as photographs of species in the key are included.
Notes On The Algae Of Arkansas. 1. Chrysococcus, Kephyrion, Kephyriopsis, Pseudokephyrion And Stenokalyx, Richard L. Meyer
Notes On The Algae Of Arkansas. 1. Chrysococcus, Kephyrion, Kephyriopsis, Pseudokephyrion And Stenokalyx, Richard L. Meyer
Journal of the Arkansas Academy of Science
The genera Chrysococcus, Kephyrion, Pseudokephyrion and Stonokalyx have received some consideration by investigators in Europe and in the boreal forest and tundra-range regions of the United States. Many of the species are considered to be cold-water stenotherms, thus occurring more frequently in northern habitats. In the present paper 4 species of Chrysococcus, 4 species of Kephyroin, 2 species of Pseudokephyrion and 2 species of Stenokalyx from Arkansas are discussed.
Studies Of Arundinaria: Experimental Induction Of Flowering And Additional Observation In The Field, Daniel L. Marsh
Studies Of Arundinaria: Experimental Induction Of Flowering And Additional Observation In The Field, Daniel L. Marsh
Journal of the Arkansas Academy of Science
Arundinaria has been observed for three successive seasons at a site near Amity, Arkansas. In advance of the 1971 flowering period rhizomes were taken from the field, pruned, and placed either in an environmental chamber or in the greenhouse in water or in sandy soil. Flowering occurred under each condition, but was most rapid and profuse in transplants growing in sandy soil in the greenhouse. Observations point to the possibility of induction of flowering or to the possible existence of an annually flowering race. Possible economic uses are considered.
Survey Of The Vascular Flora Of Poinsett County, Arkansas, Michael I. Johnson
Survey Of The Vascular Flora Of Poinsett County, Arkansas, Michael I. Johnson
Journal of the Arkansas Academy of Science
A survey of the vascular flora of Poinsett County, Arkansas was made over a period of 13 months. The fifteen field trips taken were planned to include representative soil associations and geographic areas within the county. Three hundred sixty-three species and varieties from eighty-three families were collected or examined.
Ichthyofaunal Diversification And Distribution In The Big Creek Watershed, Craighead And Greene Counties, Arkansas, James T. Jenkins, George L. Harp
Ichthyofaunal Diversification And Distribution In The Big Creek Watershed, Craighead And Greene Counties, Arkansas, James T. Jenkins, George L. Harp
Journal of the Arkansas Academy of Science
Big Creek is a relatively small deltaic stream, in northeastern Arkansas, in an area of intense cultivation. Recently it has been dredged in the interest of flood control. Lost Creek and Mud Creek are the major tributaries of Big Creek and collectively drain the Big Creek watershed. The streams were found to have relatively low alkalinity, moderate carbon dioxide, adequate oxygen values, and relatively high turbidity. Channeling of Big Creek and Lost Creek has effectively destroyed distinct pool-riffle biocies and reduced the number of acceptable spawning areas. Lost Creek, also, receives effluent from residential dwellings, a secondary treatment sewage plant, …
Demonstration, And A Suggested Immune Role, Of Mouse Antibodies Against Salmonella Enteritidis Endotoxins, Jimmie D. Barrack, Leo J. Paulissen
Demonstration, And A Suggested Immune Role, Of Mouse Antibodies Against Salmonella Enteritidis Endotoxins, Jimmie D. Barrack, Leo J. Paulissen
Journal of the Arkansas Academy of Science
No abstract provided.
Facility For The Biological Treatment Of A Complex Chlorophenolic Waste - A Preliminary Report, William F. Evans
Facility For The Biological Treatment Of A Complex Chlorophenolic Waste - A Preliminary Report, William F. Evans
Journal of the Arkansas Academy of Science
The City of Jacksonville, Arkansas, is attempting to determine if aeration of a combined domestic sewage — chlorophenolic herbicide waste prior to release into conventional waste stabilization lagoons will be useful in the microbiological oxidation of chlorophenols and chlorophenoxy acids.
Effects Of Urethan On Fish Epithelial And Fibroblast Cells In Vitro, Leland F. Morgans
Effects Of Urethan On Fish Epithelial And Fibroblast Cells In Vitro, Leland F. Morgans
Journal of the Arkansas Academy of Science
The effects of urethan on RTG-2 and FHM cells were studied in vitro, by using the mitotic index, it was determined that 0.3 percent urethan caused an increase in the rate of cell division while higher concentrations (0.6, 0.9, 1.2, and 1.5 percent) caused either a decrease in the rate or a cessation of cell division. Concentrations of urethan higher than 1.5 percent killed the cells. The mitotic index data also indicated that epithelial cells continued to divide at a higher concentration of urethan than did the fibroblast cells. The morphological effects of urethan on the two cell lines were …
Phosphorescent Animal Forms Of Arkansas, Peggy Rae Dorris
Phosphorescent Animal Forms Of Arkansas, Peggy Rae Dorris
Journal of the Arkansas Academy of Science
Two phosphorescent animal forms, Euryurus sp. and Centruroides vittatus, were collected with a black light in an attempt to collect phosphorescent spiders. Both the millipede and the scorpion were easily observed by the bright phosphorescent yellow color which glowed in the presence of the black light
Pre-Impoundment Limnological Study Of The Strawberry River In Northeastern Arkansas, Henry W. Robison, George L. Harp
Pre-Impoundment Limnological Study Of The Strawberry River In Northeastern Arkansas, Henry W. Robison, George L. Harp
Journal of the Arkansas Academy of Science
A study of pre-impoundment limnological characteristics of the Strawberry River was made from August, 1967 to June, 1968. Two collecting stations were established, one upstream which would not be inundated and a lower station which would be inundated when impoundment was complete. The Strawberry River was characterized by high alkalinity and pH, low carbon dioxide and turbidity, and adequate oxygen values. Plankton was characterized by limited numbers of Staurastrum, Gomphonema, and Rotatoria. Pool-riffle communities were ill-defined. Chironomidae, Oligochaeta and Ephemeroptera were dominant pool macroinvertebrates among 13 taxa collected. Of the 20 taxa collected in riffles Trichoptera, Ephemeroptera, Simuliidae and Chironomidae …
Rapid Electroosmosis Measurements, James O. Wear
Rapid Electroosmosis Measurements, James O. Wear
Journal of the Arkansas Academy of Science
A cell has been designed and built that allows for rapid measurement of volume moved in a definite time by electroosmosis. The cell is simple to use and is not very elaborate. Using a water jacket, the cell temperature can be controlled to ± 0.1° C. Measurements are presented for acetonitrile, dimethylformamide, and nitrobenzene at 25° C for applied voltages of 25, 50, 75, and 100 volts.