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

Digital Commons Network™

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

University of Arkansas, Fayetteville

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 4471 - 4500 of 7198

Full-Text Articles in Entire DC Network

Seasonal Variability As A Source Of Uncertainty In The West Siberian Regional Ch4 Flux Upscaling, A. F. Sabrekov, Benjamin R. K. Runkle, M. V. Glagolev, I E. Kleptsova, S. S. Maksyutov Apr 2014

Seasonal Variability As A Source Of Uncertainty In The West Siberian Regional Ch4 Flux Upscaling, A. F. Sabrekov, Benjamin R. K. Runkle, M. V. Glagolev, I E. Kleptsova, S. S. Maksyutov

Biological and Agricultural Engineering Faculty Publications and Presentations

This study compares seasonal and spatial variations in methane fluxes as sources of uncertainty in regional CH4 flux upscaling from the wetlands of West Siberia. The study examined variability in summertime CH4 emissions from boreal peatlands, with a focus on two subtaiga fen sites in the southern part of West Siberia (Novosibirskaya oblast). We measured CH4 flux, water table depth, air and peat temperature, pH and electric conductivity of peat water during three field campaigns in summer 2011 (9–12 July, 26–28 July and 20–21 August). Fluxes were measured with static chambers at sites chosen to represent two of the most …

Go to article

The Surface Energy Balance And Its Drivers In A Boreal Peatland Fen Of Northwestern Russia, Benjamin R. K. Runkle, Christian Wille, Michal Gazovic, M. Wilmking, L. Kutzbach Apr 2014

The Surface Energy Balance And Its Drivers In A Boreal Peatland Fen Of Northwestern Russia, Benjamin R. K. Runkle, Christian Wille, Michal Gazovic, M. Wilmking, L. Kutzbach

Biological and Agricultural Engineering Faculty Publications and Presentations

Boreal peatland energy balances using the eddy covariance technique have previously been made in Alaska, Canada, Scandinavia, and Western Siberia, but not in the European portion of the Russian Federation. European Russia contains approximately 200,000 km2 of peatlands and has a boreal (subarctic), continental climate influencing the region’s energy balance. To help fill this research gap, the surface energy balance was determined for a boreal peatland fen in the Komi Republic of Russia for an 11-month period in 2008–2009 using the eddy covariance method. The total measurement period’s cumulative energy balance closure rate was 86%, with higher closure during the …

Go to article

Collection Development And Management: An Overview Of The Literature, 2011-2012, Kathleen A. Lehman Apr 2014

Collection Development And Management: An Overview Of The Literature, 2011-2012, Kathleen A. Lehman

University Libraries Faculty Publications and Presentations

The collection development and management literature from 2011 and 2012 explores how libraries are making difficult collection choices with decreasing funds, competing needs for space, and a continually developing e-market. Digital content is no longer new in collection management, but some of the ways the content is chosen have changed; collection-building activities now include various models of patron-driven demand acquisitions. Other literature in this area examines how libraries are addressing their print and electronic collections with topics including open access materials, shared collection building, and weeding collections for repurposed space.

Go to article

Mole Street Journal, March 2014, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry Apr 2014

Mole Street Journal, March 2014, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry

Mole Street Journal

No abstract provided.

Go to article

Research Frontiers, Spring 2014, University Of Arkansas Fayetteville. Office Of University Relations Mar 2014

Research Frontiers, Spring 2014, University Of Arkansas Fayetteville. Office Of University Relations

Research Frontiers

No abstract provided.

Go to article

Single Molecule Fret Reveals Pore Size And Opening Mechanism Of A Mechano-Sensitive Ion Channel, Yong Wang, Yanxin Liu, Hannah A. Deberg, Takeshi Nomura, Melinda Tonks Hoffman, Paul R. Rohde, Klaus Schulten, Boris Martinac, Paul R. Selvin Feb 2014

Single Molecule Fret Reveals Pore Size And Opening Mechanism Of A Mechano-Sensitive Ion Channel, Yong Wang, Yanxin Liu, Hannah A. Deberg, Takeshi Nomura, Melinda Tonks Hoffman, Paul R. Rohde, Klaus Schulten, Boris Martinac, Paul R. Selvin

Physics Faculty Publications and Presentations

The mechanosensitive channel of large conductance, which serves as a model system for mechanosensitive channels, has previously been crystallized in the closed form, but not in the open form. Ensemble measurements and electrophysiological sieving experiments show that the open-diameter of the channel pore is >25 Å, but the exact size and whether the conformational change follows a helix-tilt or barrel-stave model are unclear. Here we report measurements of the distance changes on liposome-reconstituted MscL transmembrane α-helices, using a ‘virtual sorting’ single-molecule fluorescence energy transfer. We observed directly that the channel opens via the helix-tilt model and the open pore reaches …

Go to article

Mole Street Journal, January 2014, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry Feb 2014

Mole Street Journal, January 2014, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry

Mole Street Journal

No abstract provided.

Go to article

Annual Report, 2014, University Of Arkansas, Fayetteville. Dale Bumpers College Of Agricultural, Food And Life Sciences. Dept. Of Biological And Agricultural Engineering Jan 2014

Annual Report, 2014, University Of Arkansas, Fayetteville. Dale Bumpers College Of Agricultural, Food And Life Sciences. Dept. Of Biological And Agricultural Engineering

Biological and Agricultural Engineering Department Annual Report

No abstract provided.

Go to article

African & African American Studies, Fall 2014, University Of Arkansas, Fayetteville. J. William Fulbright College Of Arts And Sciences, University Of Arkansas, Fayetteville. African And African American Studies Program Jan 2014

African & African American Studies, Fall 2014, University Of Arkansas, Fayetteville. J. William Fulbright College Of Arts And Sciences, University Of Arkansas, Fayetteville. African And African American Studies Program

African and African American Studies Newsletter

No abstract provided.

Go to article

Graduate Catalog Of Studies, 2013-2014, University Of Arkansas, Fayetteville Jan 2014

Graduate Catalog Of Studies, 2013-2014, University Of Arkansas, Fayetteville

Graduate School Catalog of Studies

No abstract provided.

Go to article

A+, The Honors College, 2014, University Of Arkansas, Fayetteville. Honors College Jan 2014

A+, The Honors College, 2014, University Of Arkansas, Fayetteville. Honors College

A+ Magazine

No abstract provided.

Go to article

Faculty Promotion And Tenure Recipients, 2014, University Of Arkansas, Fayetteville. Libraries, University Of Arkansas, Fayetteville. Provost And Vice Chancellor For Academic Affairs, University Of Arkansas, Fayetteville. Office Of The Chancellor Jan 2014

Faculty Promotion And Tenure Recipients, 2014, University Of Arkansas, Fayetteville. Libraries, University Of Arkansas, Fayetteville. Provost And Vice Chancellor For Academic Affairs, University Of Arkansas, Fayetteville. Office Of The Chancellor

Faculty Promotion and Tenure Reception

Event was sponsored by Chancellor and Provost

Go to article

Undergraduate Catalog Of Studies, 2013-2014, University Of Arkansas, Fayetteville Jan 2014

Undergraduate Catalog Of Studies, 2013-2014, University Of Arkansas, Fayetteville

Undergraduate Catalog of Studies

No abstract provided.

Go to article

Arkansas Catalyst, January 2014, University Of Arkansas, Fayetteville Jan 2014

Arkansas Catalyst, January 2014, University Of Arkansas, Fayetteville

Arkansas Catalyst

No abstract provided.

Go to article

Student Handbook, 2014, University Of Arkansas, Fayetteville Jan 2014

Student Handbook, 2014, University Of Arkansas, Fayetteville

Student Handbook

No abstract provided.

Go to article

Effect Of The Clostridium Difficile Tcde Protein On Membranes Of Escherichia Coli, Sophie Hollenberg Jan 2014

Effect Of The Clostridium Difficile Tcde Protein On Membranes Of Escherichia Coli, Sophie Hollenberg

Inquiry: The University of Arkansas Undergraduate Research Journal

Clostridium difficile infects millions of hospitalized patients worldwide, causing pseudomembranous colitis, a disease with symptoms attributable to two toxins produced by the bacterium.The PaLoc gene locus in the C. difficile genome is responsible for toxin production and activation, but it is not known how the toxins are released from the pathogen. Within PaLoc is a gene for the TcdE protein, which shares striking similarity to a class of membrane pore-forming proteins called holins. To assess whether TcdE catalyzes toxin release, the engineered tcdE gene was expressed in Escherichia coli. An arabinose promoter upstream of the tcdE gene was manipulated to …

Go to article

Contents, Inquiry Editors Jan 2014

Contents, Inquiry Editors

Inquiry: The University of Arkansas Undergraduate Research Journal

No abstract provided.

Go to article

Foreword, Marcia A. Shobe Jan 2014

Foreword, Marcia A. Shobe

Inquiry: The University of Arkansas Undergraduate Research Journal

No abstract provided.

Go to article

Inquiry: The University Of Arkansas Undergraduate Research Journal - Volume 16 - Spring 2014, Inquiry Editors Jan 2014

Inquiry: The University Of Arkansas Undergraduate Research Journal - Volume 16 - Spring 2014, Inquiry Editors

Inquiry: The University of Arkansas Undergraduate Research Journal

No abstract provided.

Go to article

Business Meeting Report (Secretary's And Treasurer's Report), Academy Editors Jan 2014

Business Meeting Report (Secretary's And Treasurer's Report), Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Serendipitous Data Following A Severe Windstorm In An Old-Growth Pine Stand, D. C. Bragg, J. D. Riddle Jan 2014

Serendipitous Data Following A Severe Windstorm In An Old-Growth Pine Stand, D. C. Bragg, J. D. Riddle

Journal of the Arkansas Academy of Science

Reliable dimensional data for old-growth pine-dominated forests in the Gulf Coastal Plain of Arkansas are hard to find, but sometimes unfortunate circumstances provide good opportunities to acquire this information. On July 11, 2013, a severe thunderstorm with high winds struck the Levi Wilcoxon Demonstration Forest (LWDF) near Hamburg, Arkansas. This storm uprooted or snapped dozens of large pines and hardwoods and provided an opportunity to more closely inspect these rare specimens. For instance, the largest tree killed in this event, a loblolly pine (Pinus taeda), was 105 cm in diameter at breast height, 39.3 m tall, and if the tree …

Go to article

Miscellaneous Fish Helminth Parasite (Trematoda, Cestoidea, Nematoda, Acanthocephala) Records From Arkansas, C. T. Mcallister, C. R. Bursey, H. W. Robison, D. A. Neely, M. B. Connior, M. A. Barger Jan 2014

Miscellaneous Fish Helminth Parasite (Trematoda, Cestoidea, Nematoda, Acanthocephala) Records From Arkansas, C. T. Mcallister, C. R. Bursey, H. W. Robison, D. A. Neely, M. B. Connior, M. A. Barger

Journal of the Arkansas Academy of Science

Between June 2012 and January 2014, 147 fishes (10 species) within five families were collected from watersheds in 8 counties of Arkansas and examined for helminth parasites. Almost every fish species examined harbored at least one or more helminth parasite, including 5 trematodes (Alloglossidium sp., Plagioporus sp., Crepidostomum sp., Clinostomum marginatum and unknown metacercaria), 2 cestodes (unknown cyclophyllidean cysticerci and Corallotaenia parva), 3 nematodes (Spiroxys sp., Capillaria catostomi, and Eustrongylides sp.), and 3 acanthocephalans (unknown cystacanths, Neoechinorhynchus sp., and Leptorhynchoides sp.). We document 16 new host and 2 new distributional records for these helminths. In addition, this is the first …

Go to article

New Host Records For Mesocestoides Sp. Tetrathyridia (Cestoidea: Cyclophyllidea) In Anurans (Bufonidae, Ranidae) From Arkansas, With A Summary Of North American Amphibian Hosts, C. T. Mcallister, M. B. Connior, S. E. Trauth Jan 2014

New Host Records For Mesocestoides Sp. Tetrathyridia (Cestoidea: Cyclophyllidea) In Anurans (Bufonidae, Ranidae) From Arkansas, With A Summary Of North American Amphibian Hosts, C. T. Mcallister, M. B. Connior, S. E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

New Host And Distribution Records Of The Leech Placobdella Multilineata Moore, 1953 (Hirudinida: Glossiphoniidae), W. E. Moser, D. J. Richardson, C. T. Mcallister, J. T. Briggler, C. I. Hammond, S. E. Trauth Jan 2014

New Host And Distribution Records Of The Leech Placobdella Multilineata Moore, 1953 (Hirudinida: Glossiphoniidae), W. E. Moser, D. J. Richardson, C. T. Mcallister, J. T. Briggler, C. I. Hammond, S. E. Trauth

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Title Of A Paper Prepared For The Arkansas Academy Of Science Journal [Instructions For Prospective Authors], Academy Editors Jan 2014

Title Of A Paper Prepared For The Arkansas Academy Of Science Journal [Instructions For Prospective Authors], Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Natural History Notes And New County Records For Ozarkian Millipeds (Arthropoda: Diplododa) From Arkansas, Kansas And Missouri, N. W. Youngsteadt, C. T. Mcallister Jan 2014

Natural History Notes And New County Records For Ozarkian Millipeds (Arthropoda: Diplododa) From Arkansas, Kansas And Missouri, N. W. Youngsteadt, C. T. Mcallister

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

Sampling Local Fungal Diversity In An Undergraduate Laboratory Using Dna Barcoding, A. H. Harrington, A. F. Bigott, B. W. Anderson, M. J. Boone, S. M. Brick, J. F. Delsol, R. A. Hotchkiss, R. A. Huddleston, E. H. Kasper, J. J. Mcgrady, M. L. Mckinnie, M. V. Ottenlips, N. E. Skinner, K. C. Spatz, A. J. Steinberg, F. Van Den Broek, C. N. Wilson, A. M. Wofford, A. M. Willyard Jan 2014

Sampling Local Fungal Diversity In An Undergraduate Laboratory Using Dna Barcoding, A. H. Harrington, A. F. Bigott, B. W. Anderson, M. J. Boone, S. M. Brick, J. F. Delsol, R. A. Hotchkiss, R. A. Huddleston, E. H. Kasper, J. J. Mcgrady, M. L. Mckinnie, M. V. Ottenlips, N. E. Skinner, K. C. Spatz, A. J. Steinberg, F. Van Den Broek, C. N. Wilson, A. M. Wofford, A. M. Willyard

Journal of the Arkansas Academy of Science

Traditional methods for fungal species identification require diagnostic morphological characters and are often limited by the availability of fresh fruiting bodies and local identification resources. DNA barcoding offers an additional method of species identification and is rapidly developing as a critical tool in fungal taxonomy. As an exercise in an undergraduate biology course, we identified 9 specimens collected from the Hendrix College campus in Conway, Arkansas, USA to the genus or species level using morphology. We report that DNA barcoding targeting the internal transcribed spacer (ITS) region supported several of our taxonomic determinations and we were able to contribute 5 …

Go to article

Distribution, Habitat Preference, And Status Of The Ditch Fencing Crayfish, Faxonella Clypeata (Hay) (Decapoda: Cambaridae), In Arkansas, H. W. Robison, C. T. Mcallister Jan 2014

Distribution, Habitat Preference, And Status Of The Ditch Fencing Crayfish, Faxonella Clypeata (Hay) (Decapoda: Cambaridae), In Arkansas, H. W. Robison, C. T. Mcallister

Journal of the Arkansas Academy of Science

The ditch fencing crayfish, Faxonella clypeata (Hay), is a common and widespread crayfish that inhabits roadside ditches, intermittent first-order streams, shallow sloughs with heavy vegetation, and edges of swamps in Arkansas. Between 1997-2012, we made 55 collections of F. clypeata in 34 counties throughout eastern Arkansas, including 23 counties where F. clypeata had not been previously documented. At most of these locations within the West Gulf Coastal and Mississippi Alluvial Plain provinces, F. clypeata was found to be a locally abundant crayfish. With regard to conservation status, F. clypeata should be considered as “Currently Stable” due to its widespread distribution …

Go to article

Urban Stream Syndrome In A Small Town: A Comparative Study Of Sager And Flint Creeks, T. S. Wakefield Jan 2014

Urban Stream Syndrome In A Small Town: A Comparative Study Of Sager And Flint Creeks, T. S. Wakefield

Journal of the Arkansas Academy of Science

Utilizing rapid bioassessment procedures and aquatic physiochemical techniques, a three-year investigation of Sager and Flint creeks was completed. Bioassessment indices and physiochemical parameters of the 2 streams were compared and the effects of urbanization on both watersheds were assessed. Correlating data concerning land usage in both watersheds and alterations of both streams' geomorphology were also utilized to conclude that Sager Creek shows a higher degree of urban stream syndrome than Flint Creek.

Go to article

First Record Of Ribbon Worms (Nemertea: Tetrastemmatidae: Prostoma) From Arkansas, P. G. Davison, H. W. Robison, C. T. Mcallister Jan 2014

First Record Of Ribbon Worms (Nemertea: Tetrastemmatidae: Prostoma) From Arkansas, P. G. Davison, H. W. Robison, C. T. Mcallister

Journal of the Arkansas Academy of Science

No abstract provided.

Go to article

First Prev Next Last