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

Life Sciences Commons™

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

University of Arkansas, Fayetteville

2001

Discipline
Keyword
Publication
Publication Type

Articles 31 - 41 of 41

Full-Text Articles in Life Sciences

Characterization Of A PorosTm-Fumonisin B1 Affinity Column For Isolating Ceramide Synthase From Rat Liver, S. Jernigan, W. B. Melchior Jr., G. R. Jenkins, K. L. Rowland, D. W. Roberts, P. C. Howard, H. Tolleson Jan 2001

Characterization Of A PorosTm-Fumonisin B1 Affinity Column For Isolating Ceramide Synthase From Rat Liver, S. Jernigan, W. B. Melchior Jr., G. R. Jenkins, K. L. Rowland, D. W. Roberts, P. C. Howard, H. Tolleson

Journal of the Arkansas Academy of Science

Fumonisin B1 is a mycotoxin produced by fungi of the genus Fusarium, common pathogens of corn and other grain plants. Toxic effects associated with fumonisin B1 include equine leukoencephalomacia, porcine pulmonary edema, rat renal carcinoma, and murine hepatocellular carcinoma. Increased risk for esophageal cancer in humans has been epidemiologically associated with consumption of corn contaminated with Fusarium, suggesting that fumonisin B1 may be involved. The biological effects of fumonisin B1 exposure result primarily from disruption of de novo sphingolipid biosynthesis via inhibition of ceramide synthase. Exposure of animals or cultured cells to fumonisin B1 results in the characteristic accumulation of …

Go to article

New Records Of The Woodchuck (Marmota Monax) From Southern Arkansas, C. Renn Tumlison, Anna Smith, Randy Frazier Jan 2001

New Records Of The Woodchuck (Marmota Monax) From Southern Arkansas, C. Renn Tumlison, Anna Smith, Randy Frazier

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Distribution Of Leconte's Free-Tailed Bat (Tadarida Brasiliensis Cynocephala) In Arkansas, With Notes On Reproduction And Natural History, David A. Saugey, D. Blake Sasse, J. D. Wilhide, Drew Reed, Tammy R. Jones, Darrell R. Heath, Daniel R. England Jan 2001

Distribution Of Leconte's Free-Tailed Bat (Tadarida Brasiliensis Cynocephala) In Arkansas, With Notes On Reproduction And Natural History, David A. Saugey, D. Blake Sasse, J. D. Wilhide, Drew Reed, Tammy R. Jones, Darrell R. Heath, Daniel R. England

Journal of the Arkansas Academy of Science

During the past 20 years (1982-2001) we have studied the biology, occurrence and distribution of LeConte's (Brazilian) free-tailed bat, Tadarida brasiliensis cynocephala, in Arkansas. Colonies and individuals were reported from man made structures only. Four new county records have been documented since 1988, extending the range from the central part of the state to Arkansas's northern-most tier of counties. Numerous nuisance maternity colonies were investigated during exclusion activities and one, year-round colony provided the majority of reproductive data. A total of 152 free-tailed bats was submitted to the Arkansas Department of Health Rabies Laboratory (1982-2001); most during February through April, …

Go to article

Life History Of The River Shiner, Notropis Blennius (Cyprinidae), In The Arkansas River Of Western Arkansas, Laura Hudson, Thomas M. Buchanan Jan 2001

Life History Of The River Shiner, Notropis Blennius (Cyprinidae), In The Arkansas River Of Western Arkansas, Laura Hudson, Thomas M. Buchanan

Journal of the Arkansas Academy of Science

The reproductive cycle, food habits, and age and growth of the river shiner, Notropis blennius (Girard), in the Arkansas River of western Arkansas were studied from May 1996 through October 1997. Based on gonadosomatic indices and mean ovumd iameters of females, tubercle development in males, and the first appearance of young-of-year in samples, the breeding season extended from June through August in both 1996 and 1997. The river shiner is a diurnal, generalist feeder that forages on a wide variety of food items. In all four seasons, detritus dominated the diets of adults and juveniles in terms of volume and …

Go to article

Breeding Season Distribution Of Cerulean Warblers In Arkansas In The 1990s, Douglas A. James, Christopher J. Kellner, Jan Self, Jerry Davis Jan 2001

Breeding Season Distribution Of Cerulean Warblers In Arkansas In The 1990s, Douglas A. James, Christopher J. Kellner, Jan Self, Jerry Davis

Journal of the Arkansas Academy of Science

The Cerulean Warbler (Dendroica cerulea) has been declining in numbers in its North American nesting range, and the same is true in Arkansas. To provide specific sites that can be monitored in the future, this study describes places where the bird was documented in the state in the 1990s. The warbler was found in mature deciduous forest in both upland and bottomland situations but was most abundant in the upland Ozark forests and uncommon in other regions of the state. Most (70%) of the occupied sites were on federal and state lands. Pattern of overall distribution was essentially the same …

Go to article

Survey Of Salvinia (Salviniaceae) In Eastern Arkansas, James H. Peck Jan 2001

Survey Of Salvinia (Salviniaceae) In Eastern Arkansas, James H. Peck

Journal of the Arkansas Academy of Science

Salvinia, water spangles, is a genus of 10 species of free-floating heterosporous aquatic ferns with two species introduced to North America. S. minima Baker was introduced into the eastern United States by at least 1814 and occurs mainly across the southeastern United States. S. molesta Mitchell was recognized as a distinct species in the 1970s, was introduced into the United States as a water-garden plant in the 1980s, and has escaped and spread across the southeastern United States in the 1990s. It is recognized by federal agency as noxious aquatic weed. S. minima Baker was discovered in Arkansas in 1998. …

Go to article

Decomposition Rate Comparisons Between Frequently Burned And Unburned Areas Of Uneven-Aged Loblolly Pine Stands In Southeastern Arkansas, Michele Renschin, Hal O. Leichty, Michael G. Shelton Jan 2001

Decomposition Rate Comparisons Between Frequently Burned And Unburned Areas Of Uneven-Aged Loblolly Pine Stands In Southeastern Arkansas, Michele Renschin, Hal O. Leichty, Michael G. Shelton

Journal of the Arkansas Academy of Science

Although fire has been used extensively over long periods of time in loblolly pine (Pinus taeda L.) ecosystems, little is known concerning the effects of frequent fire use on nutrient cycling and decomposition. To better understand the long-term effects of fire on these processes, foliar litter decomposition rates were quantified in a study investigating prescribed fire and uneven-aged loblollypine management in the Upper Coastal Plain in Arkansas. Part of the study area had been burned on a 2- to 3-year cycle since 1981, whereas another portion had not received any prescribed fires. Decomposition rates were determined by placing foliar litter …

Go to article

Results Of A Bat Survey In The Western Ozark National Forest, Michelle L. Caviness, Douglas A. James Jan 2001

Results Of A Bat Survey In The Western Ozark National Forest, Michelle L. Caviness, Douglas A. James

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Status Report On Harperella, Ptilimnium Nodosum (Rose) Mathias, In Arkansas, Edith L. Hardcastle, David X. Williams Jan 2001

Status Report On Harperella, Ptilimnium Nodosum (Rose) Mathias, In Arkansas, Edith L. Hardcastle, David X. Williams

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Early History Of The Wolf, Black Bear, And Mountain Lion In Arkansas, Annalea K. Bowers, Leah D. Lucio, David W. Clark, Susan P. Rakow, Gary A. Heidt Jan 2001

Early History Of The Wolf, Black Bear, And Mountain Lion In Arkansas, Annalea K. Bowers, Leah D. Lucio, David W. Clark, Susan P. Rakow, Gary A. Heidt

Journal of the Arkansas Academy of Science

During the nineteenth century settlement of Arkansas, the red wolf (Canis rufos), black bear (Ursus americanus), and mourtain lion (Puma concolor) were not only the three largest and most dangerous predators, they also stirred the imaginations of explorers and settlers. References to these species appeared prominently in the journals of early explorers such as George W. Featherstonhaugh (1844) and Frederick Gerstaecker (1854), and their presence inspired voluminous collections of stories and tall tales. Black bears were so common that a large trade developed in pelts, oil, and other body parts, and Arkansas became commonly known as "The Bear State." Wolves …

Go to article

Ouachita Mountain Population Of Diphasiastrum Digitatum (Dillenius Ex. A. Braun (Holub)) Reported In Montgomery County On The Ouachita National Forest, Terry Keith Mckay, Daniel L. Marsh Jan 2001

Ouachita Mountain Population Of Diphasiastrum Digitatum (Dillenius Ex. A. Braun (Holub)) Reported In Montgomery County On The Ouachita National Forest, Terry Keith Mckay, Daniel L. Marsh

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

First Prev