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Invertebrate Abundances And Diversity Of A Six Year Old Organic Apple Orchard In Northwest Arkansas, Cory Johnson, Brina Smith, Mary C. Savin Jan 2012

Invertebrate Abundances And Diversity Of A Six Year Old Organic Apple Orchard In Northwest Arkansas, Cory Johnson, Brina Smith, Mary C. Savin

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Ground cover mulch applications in perennial systems can have multiple benefits, one of which may be to enhance the size and diversity of the ground surface faunal community. To determine if ground cover and organic fertilizer applications altered invertebrate communities, litters in an experimental 0.4-ha organic apple orchard in Fayetteville, Ark. were sampled during a four week period beginning in February 2012. The orchard was planted in 2006 in a replicated 4 × 3 factorial design with organic ground cover and fertilizer treatments applied annually each April. Invertebrates were extracted using Berlese funnels and hand sorting techniques. Ground covers (wood …

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Acknowledgment Of The Major Sponsors Of The Academy: Arkansas Natural Heritage Commission; Ouachita National Forest, Academy Editors Jan 2012

Acknowledgment Of The Major Sponsors Of The Academy: Arkansas Natural Heritage Commission; Ouachita National Forest, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Table Of Contents, Academy Editors Jan 2012

Table Of Contents, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Tribute To Dr. George And Phoebe Harp, Academy Editors Jan 2012

Tribute To Dr. George And Phoebe Harp, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Fabrication And Characterization Of Aluminum-Doped Zno/Pani Hybrid Solar Cells, S. Abdulalmohsin, S. M. Al-Mutoki, Z. Li Jan 2012

Fabrication And Characterization Of Aluminum-Doped Zno/Pani Hybrid Solar Cells, S. Abdulalmohsin, S. M. Al-Mutoki, Z. Li

Journal of the Arkansas Academy of Science

We report a facile method to fabricate an AZO/PANI heterostructure by a sandwiching technique. Aluminum-doped ZnO (AZO) films were deposited onto indium tin oxide (ITO) glass using the sputtering technique while PANI films were deposited onto ITO glass using electropolymerization. The optoelectric properties of the inorganic/organic device were characterized

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Journal Of The Arkansas Academy Of Science - Volume 66 2012, Academy Editors Jan 2012

Journal Of The Arkansas Academy Of Science - Volume 66 2012, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Al/Pani-Mwnt/Au-Plastic Schottky Diode Solar Cells, S. Abdulalmohsin, S. M. Al-Mutoki, Z. Li Jan 2012

Al/Pani-Mwnt/Au-Plastic Schottky Diode Solar Cells, S. Abdulalmohsin, S. M. Al-Mutoki, Z. Li

Journal of the Arkansas Academy of Science

Al/PANI-MWNT/Au-Plastic Schottky diode solar cells were fabricated by the electrochemical polymerization technique to make polyaniline films on the top of gold nanoparticles film. The aluminum contact was deposited by thermal evaporation. The electro-optical characteristics of these devices produced at the different polymerization time were compared. Here, we achieved the highest ever reported open-circuit voltage of 0.8 V with the electrochemical polymerization technique. The polymerization of polyaniline films was thought to be a major factor in the enhanced performance. The effects of varying the polyaniline thickness on the device performance were investigated

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Status, Dispersal, And Breeding Biology Of The Exotic Eurasian Collared-Dove (Streptopelia Decaocto) In Arkansas, J. M. Fielder, R. Kannan, D. A. James, J. Cunningham Jan 2012

Status, Dispersal, And Breeding Biology Of The Exotic Eurasian Collared-Dove (Streptopelia Decaocto) In Arkansas, J. M. Fielder, R. Kannan, D. A. James, J. Cunningham

Journal of the Arkansas Academy of Science

The exotic Eurasian Collared-Dove (Streptopelia decaocto) was first sighted in Arkansas at Harrison (Boone Co.) on 25 June 1989. Since this initial sighting the species has grown in numbers and is now present in 42 of 75 counties across the state. In the spring and summer of 2009 and 2010, 20 nests were observed in the urban areas of Fort Smith (Sebastian County). Fifteen of the 20 nests (75%) were located on human-made structures of which 13 (65%) were on an electrical substation and two (10%) were on utility poles. The remaining 5 nests (25%) were in trees. Mean nest …

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Establishing Baseline Nutrient And Sediment Input In The Lower Cache River Watershed, Ar, A. M. Gilmer, C. A. Rosado-Berrios, J. L. Bouldin Jan 2012

Establishing Baseline Nutrient And Sediment Input In The Lower Cache River Watershed, Ar, A. M. Gilmer, C. A. Rosado-Berrios, J. L. Bouldin

Journal of the Arkansas Academy of Science

Contaminants in waterways continue to be a problem especially in watersheds dominated by land use changes such as agriculture. Clearing the land for agricultural use is needed to support the population; however, agricultural contaminants are cited as contributing the greatest input of suspended solids and nutrients to waterways. Quantifying various contaminants in surface water is useful in determining their origin, thus aiding in their mitigation. This study, focused on the Cache River Watershed, reports pH, dissolved oxygen (DO), conductivity, turbidity, total suspended solids (TSS), NO3 - , NO2 - , and PO4 3- in the lower sub watersheds. It was …

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Retrospective Epidemiologic Analysis Of Influenza Pandemics In Arkansas, A, A. J. Gray, D. Nguyen, B. M. Rowley Jan 2012

Retrospective Epidemiologic Analysis Of Influenza Pandemics In Arkansas, A, A. J. Gray, D. Nguyen, B. M. Rowley

Journal of the Arkansas Academy of Science

This study compares influenza mortality in Arkansas during the pandemics of: 1918 (aka Spanish flu), 1957, 1968, and 2009 (H1N1, aka Swine flu). Death certificate and U.S. census data were gathered and analyzed for statistical differences in mortalities based on sex, age, and geographic regions of Arkansas for each pandemic. The geographic regions were defined by the five Public Health Units classified by the Arkansas Department of Health. Regional mortalities were also analyzed across all pandemics to investigate how the different pandemics affected each individual region. Chi-square analyses for each pandemic showed only the 1918 pandemic had statistical differences between …

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Distribution, Life History Aspects, And Conservation Status Of The Spothanded Crayfish, Orconectes (Procericambarus) Punctimanus (Creaser) (Decapoda: Cambaridae), In Arkansas, C. T. Mcallister, H. W. Robison Jan 2012

Distribution, Life History Aspects, And Conservation Status Of The Spothanded Crayfish, Orconectes (Procericambarus) Punctimanus (Creaser) (Decapoda: Cambaridae), In Arkansas, C. T. Mcallister, H. W. Robison

Journal of the Arkansas Academy of Science

The spothanded crayfish, Orconectes (Procericambarus) punctimanus (Creaser), is an endemic crayfish of the Interior Highlands (Ozark Plateau) of Arkansas and Missouri. Fieldwork within the Arkansas portion of its overall distribution from 1999–2012 and a search of museum and literature records revealed a state distribution of 11 counties in northern Arkansas. Eighty-two collections of this crayfish were made from the White River system in 9 counties, including Baxter, Fulton, Independence, Izard, Lawrence, Marion, Randolph, Sharp, and Stone. Two additional counties, Clay and Searcy, are also added to the distribution of O. punctimanus from museum and literature records. This crayfish inhabits areas …

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Effects Of Drosophila Ribosomal Protein S6 Kinase On Wing Growth, M. J. Stewart, J. L. Hunt Jan 2012

Effects Of Drosophila Ribosomal Protein S6 Kinase On Wing Growth, M. J. Stewart, J. L. Hunt

Journal of the Arkansas Academy of Science

In multicellular animals, organ size, cell size and total organism size are regulated by signaling through the insulin receptor and TOR signaling pathways. The ribosomal protein S6 kinase is a key component of these pathways. It has been shown that mice or Drosophila lacking this kinase have a reduced body size that is associated with a decrease in cell size. Ectopic expression of activated or dominant negative transgenic variants of the Drosophila homolog of ribosomal S6 kinase (dS6K) has been shown to cause phenotypes that are consistent with a role for dS6K in growth, but whether the phenotypes were due …

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Analysis Of Human Tacc3 In Cellular Responses To Polycyclic Aromatic Hydrocarbons, Ivan H. Still, B. Lauffart Jan 2012

Analysis Of Human Tacc3 In Cellular Responses To Polycyclic Aromatic Hydrocarbons, Ivan H. Still, B. Lauffart

Journal of the Arkansas Academy of Science

Very little is known about the etiology of ovarian cancer. However, studies have shown that occupational exposure to polycyclic aromatic hydrocarbons (PAHs) and tobacco smoking can increase ovarian cancer risk. Previously, we have determined that 100% of ovarian tumors show loss or aberrant subcellular localization of TACC3 (transforming acidic coiled coil 3) relative to the normal ovarian surface epithelium (OSE). In mice, a role for TACC3 in the cellular response to PAH has been defined. However, comparable studies for human TACC3 has not been performed. In this report, we show that specific knockdown of TACC3 in human ovarian cancer cells …

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Using Infrared Imagery To Estimate White-Tailed Deer Populations On The Pine Bluff Arsenal, D. M. Techentin, E. S. Boyd, W. E. Sparks, R. E. Kissell Jr. Jan 2012

Using Infrared Imagery To Estimate White-Tailed Deer Populations On The Pine Bluff Arsenal, D. M. Techentin, E. S. Boyd, W. E. Sparks, R. E. Kissell Jr.

Journal of the Arkansas Academy of Science

Military installations present unique challenges to natural resource managers managing wildlife populations. For those species that are hunted or trapped, it is important to provide data to these installations for achieving sustainable harvests. Pine Bluff Arsenal (PBA), a military installation in southeastern Arkansas, manages for a host of wildlife species including white-tailed deer (Odocoileus virginianus). However, baseline data regarding population size for deer are lacking. We used infrared technology and distance sampling to estimate the size of the winter, post-harvest deer population on PBA. We identified 9 competing models. The best model provided an estimate of density of 0.245 deer/ha …

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Summary Of Previous And New Records Of The Least Darter (Etheostoma Microperca) In Arkansas, B. K. Wagner, M. D. Kottmyer, M. E. Slay Jan 2012

Summary Of Previous And New Records Of The Least Darter (Etheostoma Microperca) In Arkansas, B. K. Wagner, M. D. Kottmyer, M. E. Slay

Journal of the Arkansas Academy of Science

The least darter, Etheostoma microperca, has a limited distribution in Arkansas and is designated as a species of greatest conservation need by the Arkansas Game and Fish Commission. The fish was first documented in the state in 1938 in Wildcat Creek west of Springdale with additional discoveries in 1960, 1973, 1981, and 1982. A 1997 study documented the persistence of the species in Healing Spring Run and a spring run tributary of Osage Creek, 2 of the historic streams. Field sampling in 2004-2005 and 2010-2011, provided more concentrated sampling efforts in the basin. This study sought to determine the present …

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The Southern Arkansas University Biodiversity Collections, S. E. Krosnick, K. S. Dockter Jan 2012

The Southern Arkansas University Biodiversity Collections, S. E. Krosnick, K. S. Dockter

Journal of the Arkansas Academy of Science

No abstract provided.

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New Geographic Distribution Records For Centipedes (Chilopoda: Scolopendromorpha) In Arkansas, Including The First From Crowley's Ridge And The Grand Prairie, C. T. Mcallister, H. W. Robison, L. C. Thompson, M. B. Connior Jan 2012

New Geographic Distribution Records For Centipedes (Chilopoda: Scolopendromorpha) In Arkansas, Including The First From Crowley's Ridge And The Grand Prairie, C. T. Mcallister, H. W. Robison, L. C. Thompson, M. B. Connior

Journal of the Arkansas Academy of Science

No abstract provided.

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History And Current Status Of Egyptian Goose (Alopochen Aegyptiacus) In Northwestern Arkansas, K. G. Smith, D. A. Fames Jan 2012

History And Current Status Of Egyptian Goose (Alopochen Aegyptiacus) In Northwestern Arkansas, K. G. Smith, D. A. Fames

Journal of the Arkansas Academy of Science

No abstract provided.

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Title Of A Paper Prepared For The Arkansas Academy Of Science Journal [Instructions For Prospective Authors], Academy Editors Jan 2012

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.

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Efficacy Of A Novel Molecular Tool In Silencing Arabidopsis Genes, Chase Purnell, Vibha Srivastava, M. Aydin Akbudak, Scott J. Nicholson Jan 2012

Efficacy Of A Novel Molecular Tool In Silencing Arabidopsis Genes, Chase Purnell, Vibha Srivastava, M. Aydin Akbudak, Scott J. Nicholson

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

RNA interference (RNAi), a pathway capable of silencing genes, has until recently only been achievable in the laboratory by the use of one method, expression of inverted repeat sequences of DNA. These constructs generate a double-stranded RNA, which in turn induce post-transcriptional silencing of other genes that bear sequence homology with the transgene. This approach of targeted gene silencing is extremely useful for studying the function of genes and engineering new traits in both plants and animals. It has recently been discovered that a transgene lacking the polyadenylation signal, called a truncated transgene, is also capable of inducing RNAi in …

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Arkansas Water Resources Center Annual Technical Report, 2011, Arkansas Water Resources Center Dec 2011

Arkansas Water Resources Center Annual Technical Report, 2011, Arkansas Water Resources Center

Arkansas Water Resources Center Annual Report

No abstract provided.

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Viscoelastic Transition And Yield Strain Of The Folded Protein, Yong Wang, Giovanni Zocchi Dec 2011

Viscoelastic Transition And Yield Strain Of The Folded Protein, Yong Wang, Giovanni Zocchi

Physics Faculty Publications and Presentations

For proteins, the mechanical properties of the folded state are directly related to function, which generally entails conformational motion. Through sub-Angstrom resolution measurements of the AC mechanical susceptibility of a globular protein we describe a new fundamental materials property of the folded state. For increasing amplitude of the forcing, there is a reversible transition from elastic to viscoelastic response. At fixed frequency, the amplitude of the deformation is piecewise linear in the force, with different slopes in the elastic and viscoelastic regimes. Effectively, the protein softens beyond a yield point defined by this transition. We propose that ligand induced conformational …

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Outstanding Educational Performance Awards: Highlighting High Achieving Arkansas Schools, 2011, Alexandra Boyd, Greg Michel, Misty Newcomb, Gary Ritter Dec 2011

Outstanding Educational Performance Awards: Highlighting High Achieving Arkansas Schools, 2011, Alexandra Boyd, Greg Michel, Misty Newcomb, Gary Ritter

Arkansas Education Reports

So, in this Arkansas Education Report (AER) we aim to highlight excellent performance and give our congratulations. To that end, we are happy to highlight many high performing schools around the state in our now-annual AER entitled the Outstanding Educational Performance Awards.

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Mole Street Journal, November 2011, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry Dec 2011

Mole Street Journal, November 2011, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry

Mole Street Journal

No abstract provided.

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A Survey Of The Ants (Hymenoptera: Formicidae) Of Arkansas And The Ozark Mountains, Joseph O'Neill Dec 2011

A Survey Of The Ants (Hymenoptera: Formicidae) Of Arkansas And The Ozark Mountains, Joseph O'Neill

Horticulture Undergraduate Honors Theses

Ants are among the most abundant animals in most terrestrial ecosystems, yet local fauna are often poorly understood due to a lack of surveys. This study separated and identified ant species from arthropod samples obtained during ongoing projects by the lab of Dr. A.P.G. Dowling, Professor of Entomology at the University of Arkansas. More than 600 ants were prepared, 284 of which were identified to genus and 263 to species. From this collection, 33 species and one morphospecies were identified, comprising 18 genera in total. Additionally, 28 new distributional records were recorded for Benton, Madison, Newton, and Washington Counties in …

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Powersearch: Augmenting Mobile Phone Search Through Personalization, Xiangyu Liu Dec 2011

Powersearch: Augmenting Mobile Phone Search Through Personalization, Xiangyu Liu

Computer Science and Computer Engineering Undergraduate Honors Theses

Cell phone has become a fundamental element of people's life. People use it to call each other, browse websites, send text messages, etc. Among all the functionalities, the most important and frequently used is the search functionality. Based on ComScore, in July 2008, Google was estimated to host 235 millions searches per day. However, unlike the search on desktop, the search on cell phone has one critical constrain: battery. Cell phone performing a normal Google search, the battery drains very fast. The reason is that when sending a query to and fetching the results from Google, cell phone keeps communicating …

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Webtailor: Internet Service For Salient And Automatic User Interest Profiles, John Anderson Dec 2011

Webtailor: Internet Service For Salient And Automatic User Interest Profiles, John Anderson

Computer Science and Computer Engineering Undergraduate Honors Theses

Website personalization systems seek to give users unique, tailored content and experiences on the Internet. A key feature of these systems is a user profile that represents each user in a way that distinguishes them from others. In current personalization systems, the data used to create these profiles is extremely limited, which leads to a host of problems and ineffectual personalization. The main goal of this thesis is to improve these personalization systems by addressing their lack of data and its poor quality, breadth, and depth. This is accomplished by analyzing and classifying the content of each user's Internet browsing …

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The Blend Of Traditional And Modern Medicine: Case Studies From Latin America As Lessons For The United States, Jessica Worley Dec 2011

The Blend Of Traditional And Modern Medicine: Case Studies From Latin America As Lessons For The United States, Jessica Worley

World Languages, Literatures and Cultures Undergraduate Honors Theses

Through the examination of the interactions between modern and alternative healthcare practices in five Latin American countries (Peru, Ecuador, Chile, Mexico, and Cuba), this thesis explores the strengths of a variety of indigenous medical practices while laying the foundation for building bridges to the modern medical establishment in the United States as a means to benefit the health of both immigrants and native citizens.

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Perceived Gender-Typing Of Successful Managerial Characteristics, Sarah Holtzen Dec 2011

Perceived Gender-Typing Of Successful Managerial Characteristics, Sarah Holtzen

Management Undergraduate Honors Theses

Previous research has indicated that the characteristics associated with successful business managers are more often attributed to men in general than to women in general. This paper seeks to examine the current state of perceived gender-typing of the characteristics associated with successful business managers. Using the Schein Descriptive Index (Schein, 1973), undergraduate business students (N=177) were asked to rate women in general, men in general, or successful business managers on a set of 92 descriptive terms. Intraclass correlation coefficients were computed to estimate the ANOVA between groups. Respondents were also asked to describe in their own words what they believe …

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Gene Expression And Physiological Analyses To Study Metabolic Shifts In Medicago Truncatula Subjected To Biotic Stresses, Michelle Ryan Martin Dec 2011

Gene Expression And Physiological Analyses To Study Metabolic Shifts In Medicago Truncatula Subjected To Biotic Stresses, Michelle Ryan Martin

Graduate Theses and Dissertations

Plants are frequently under attack from pests and deploy various defense mechanisms to fight off predators. Many plant defenses are induced following herbivory or pathogen infection. An investment in defense could potentially lead to a diversion of metabolic resources away from primary metabolism, including reduction in plant commitment to photosynthesis. In this thesis, changes in expression levels of representative genes for primary and secondary metabolism were studied using real-time polymerase chain reaction (PCR) in Medicago truncatula Gaertner subjected to beet armyworm (Spodoptera exigua H¨¹bner) damage or Phoma medicaginis Malbr. & Roum. infection. Photosynthetic yield was also measured using chlorophyll fluorescence …

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