Digital Commons Network^™

Topography Of The Chimpanzee Corpus Callosum, Kimberley A. Phillips, William D. Hopkins

Psychology Faculty Research

The corpus callosum (CC) is the largest commissural white matter tract in mammalian brains, connecting homotopic and heterotopic regions of the cerebral cortex. Knowledge of the distribution of callosal fibers projecting into specific cortical regions has important implications for understanding the evolution of lateralized structures and functions of the cerebral cortex. No comparisons of CC topography in humans and great apes have yet been conducted. We investigated the topography of the CC in 21 chimpanzees using high-resolution magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI). Tractography was conducted based on fiber assignment by continuous tracking (FACT) algorithm. We expected …

Human Security: Undermining Human Rights?, Rhoda E. Howard-Hassmann

Political Science Faculty Publications

This article warns that the human security discourse and agenda could inadvertently undermine the international human rights regime. Insofar as human security identifies new threats to well-being, new victims of those threats, new duties of states, or new mechanisms for dealing with threats at the inter-state level, it adds to the established human rights regime. When it simply rephrases human rights principles without identifying new threats, victims, duty-bearers, or mechanisms, however, at best it complements human rights and at worst it undermines them. A narrow view of human security is a valuable addition to the international normative regime requiring wstate …

Heat Transfer Coefficients In Mimicked Fischer-Tropsch Slurry Bubble Columns, Chengtian Wu, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

To Provide More Support for Fischer-Tropsch (FT) Slurry Bubble Column Reactor Design, Scale-Up, and Performance, the Effects of Operating Conditions on the Heat Transfer Coefficients Were Investigated in a Mimicked FT Cold Flow System (Compressed Air:C 9-C 11:FT Catalyst Carrier). the Studied Operating Conditions Varied in Superficial Gas Velocity (Up to 0.3 M/s), Pressure (Up to 10 Bar), and Solids Concentration (Up to 25 Vol %). the Effects of These Variables on Heat Transfer Coefficients Are Discussed and Analyzed. the Increase in Pressure Tended to Reduce the Heat Transfer Coefficient, While the Increase in Solids Loading Enhanced the Heat Transfer …

Using A Training Video To Improve Agricultural Workers' Knowledge Of On-Farm Food Safety, Lisa Mathiasen, Katija Morley, Benjamin Chapman, Douglas Powell

Journal of Extension

A training video was produced and evaluated to assess its impact on the food safety knowledge of agricultural workers. Increasing food safety knowledge on the farm may help to improve the safety of fresh produce. Surveys were used to measure workers' food safety knowledge before and after viewing the video. Focus groups were used to determine workers' views of the video and identify areas that could be improved. Results indicated a high level of food safety knowledge, but some significant improvements were observed. The project provides a framework for assessing videos as training tools and suggestions for further research.

Investigation Of The Role Of The Family In Anorexia Nervosa Treatment, Katie Dabrowski

Mako: NSU Undergraduate Student Journal

Anorexia nervosa burdens individuals with an unyielding obsession with weight loss and food restriction, ultimately leading to extreme emaciation and even death (Kaye, Fudge, & Paulus, 2009). This disorder most often plagues adolescent females, with estimates of prevalence in 0.2% to 1% of adolescent girls (Mirsa et al, 2011). Current literature suggests family relationships and dynamics, rather than blaming individual family members, are essential in understanding and ultimately treating the disorder for adolescent girls. This paper will review the literature on family relationships and dynamics conducive to disordered eating among daughters, as well as examine the findings regarding supportive family …

Evolution Of The Lake Titicaca Basin And Its Diatom Flora Over The Last ~ 370,000 Years, Sherilyn C. Fritz, P. A. Baker, Pedro M. Tapia, Trisha L. Spanbauer, Karlyn S. Westover

Department of Earth and Atmospheric Sciences: Faculty Publications

In recent years, deep drilling undertaken as part of the International Continental Drilling Program has generated multiple long lacustrine sedimentary records to reconstruct continental paleoclimate. In many cases, the tectonic and geomorphic history of these basins is under-constrained and poorly known, which affects the interpretation of climate history from geophysical, geochemical, and paleobiotic proxies in the sedimentary record. In addition, non-analog biotic assemblages that reflect evolutionary processes may constrain the reconstruction of past environments. In the drill-core record of Lake Titicaca, spanning the last ~ 370 ka, the diatom stratigraphy reflects both the influence of climate and the longterm evolution …

The Giant Danio (D. Aequipinnatus) As A Model Of Cardiac Remodeling And Regeneration, Pascal J. Lafontant, Jamie A. Grivas, Mary A. Lesch, Lala Tanmoy Das, Tyler D. Frounfelter

Biology Faculty publications

The paucity of mammalian adult cardiac myocytes (CM) proliferation following myocardial infarction (MI) and the remodeling of the necrotic tissue that ensues, result in non-regenerative repair. In contrast, zebrafish (ZF) can regenerate after an apical resection or cryoinjury of the heart. There is considerable interest in models where regeneration proceeds in the presence of necrotic tissue. We have developed and characterized a cautery injury model in the giant danio (GD), a species closely related to ZF, where necrotic tissue remains part of the ventricle, yet regeneration occurs. By light and transmission electron microscopy (TEM), we have documented four temporally overlapping …

Effect Of Soil Salinity Level On Development And Functioning Of Endomycorrhizae In The Groundcover Wedelia Trilobata (L.) Grown On Dune Sand From The Uae, Farivash Abdullah Rajaei

Theses

In semi-arid parts of the world such as the U A E, salinity is a major constraint to plant growth and development. More than 80 % of a land plants live in symbiosis with soil fungi of the Glomeromycota. These are also called arbuscular mycorrhizal fungi (AMF), and have been shown to contribute to growth and nutrient uptake of a broad range of agricultural plants. A positive effect of the AM symbiosis on plant performance under salinity has often been observed, but the precise mechanisms behind this effect are unknown to date. Mycotrophic plants common I) grown on saline sandy …

A Comprehensive Method For Fractionating Soil Organic Matter Not Protected And Protected From Decomposition By Physical And Chemical Mechanisms, César Plaza, José M. Fernández, Engil Isadora Pujol Pereira, Alfredo Polo

School of Earth, Environmental, & Marine Sciences Faculty Publications

The objective of this work was to describe a method for isolating meaningful and measurable soil organic matter (SOM) pools that differ in the mechanisms by which they are protected from decomposition. The proposed method is appropriate for soil C stabilization and sequestration studies. Unlike previous fractionation schemes, this procedure allows free SOM located between aggregates (unprotected C pool) and SOM occluded within both macroaggregates and microaggregates (C weakly and strongly protected by physical mechanisms, respectively) to be recovered separately, freed from the soil mineral matrix and the mineral-associated SOM pool (C pool protected by chemical mechanisms) and thus well …

Cardiomyopathy Detection From Electrocardiogram Features, Mirela Ovreiu, Daniel J. Simon

Electrical and Computer Engineering Faculty Publications

Cardiomyopathy means "heart (cardio) muscle (myo) disease (pathy)". Currently, cardiomyopathies are defined as myocardial disorders in which the heart muscle is structurally and/or functionally abnormal in the absence of a coronary artery disease, hypertension, valvular heart disease or congenital heart disease sufficient to cause the observed myocardial abnormalities. This book provides a comprehensive, state-of-the-art review of the current knowledge of cardiomyopathies. Instead of following the classic interdisciplinary division, the entire cardiovascular system is presented as a functional unity, and the contributors explore pathophysiological mechanisms from different perspectives, including genetics, molecular biology, electrophysiology, invasive and non-invasive cardiology, imaging methods and surgery. …

An Inside Job: Hacking Into Janus Kinase/Signal Transducer And Activator Of Transcription Signaling Cascades By The Intracellular Protozoan Toxoplasma Gondii, Eric Y. Denkers, David J. Bzik, Barbara A. Fox, Barbara A. Butcher

Dartmouth Scholarship

The intracellular protozoan Toxoplasma gondii is well known for its skill at invading and living within host cells. New discoveries are now also revealing the astounding ability of the parasite to inject effector proteins into the cytoplasm to seize control of the host cell. This review summarizes recent advances in our understanding of one such secretory protein called ROP16. This molecule is released from rhoptries into the host cell during invasion. The ROP16 molecule acts as a kinase, directly activating both signal transducer and activator of transcription 3 (STAT3) and STAT6 signaling pathways. In macrophages, an important and preferential target …

Calorimetric Behavior Of Phosphatidylcholine/Phosphatidylethanolamine Bilayers Is Compatible With The Superlattice Model, Kwan H. Cheng, Jorma Virtanen, Pentti Somerharju

Physics and Astronomy Faculty Research

Differential scanning calorimetry was used to study the phase behavior of binary lipid bilayers consisting of phosphatidylcholine (PC) and phosphatidylethanolamine (PE) of varying acyl chain length. A two-state transition model was used to resolve the individual transition components, and the two-state transition enthalpy, the relative enthalpy, and the transition temperature of each component were plotted as a function of composition. Intriguingly, abrupt changes in these thermodynamic parameters were observed at or close to many “critical” X_PE values predicted by the superlattice model proposing that phospholipids with different headgroups tend to adopt regular rather than random lateral distributions. Statistical analysis …

The Importance Of Craniofacial Sutures In Biomechanical Finite Element Models Of The Domestic Pig, Jen A. Bright

School of Geosciences Faculty and Staff Publications

Craniofacial sutures are a ubiquitous feature of the vertebrate skull. Previous experimental work has shown that bone strain magnitudes and orientations often vary when moving from one bone to another, across a craniofacial suture. This has led to the hypothesis that craniofacial sutures act to modify the strain environment of the skull, possibly as a mode of dissipating high stresses generated during feeding or impact. This study tests the hypothesis that the introduction of craniofacial sutures into finite element (FE) models of a modern domestic pig skull would improve model accuracy compared to a model without sutures. This allowed the …

The Effects Of Single-Gender Math Classroom Activities On The Achievement And Behavior Outcomes Of Fifth-Grade Girls And Boys At A Public Elementary School, Erik P. Chaussee

Student Work

The purpose of this study was to examine single-gender schools and/or classes as a method of improving student achievement and gaining greater satisfaction in school. The paper will further examine the effects of single-gender classes on student achievement, the academic gender gap, and the attitudes of students and teachers. It will also look at the legal implications of such a practice. In addition, it will examine a variety of school district's past methods and structures in order to implement a single-gender school or single-gender classes within a coed school including other programs within schools.

Review Of Ultrasound Elastography Quality Control And Training Test Phantoms, S. Cournane, Andrew Fagan, Jacinta Browne

Articles

While the rapid development of ultrasound elastography techniques in recent decades has sparked its prompt implementation in the clinical setting adding new diagnostic information to conventional imaging techniques, questions still remain as to its full potential and efficacy in the hospital environment. A limited number of technical studies have objectively assessed the full capabilities of the different elastography approaches, perhaps due, in part, to the scarcity of suitable tissue-mimicking materials and appropriately designed phantoms available. Few commercially-available elastography phantoms possess the necessary test target characteristics or mechanical properties observed clinically, or indeed reflect the lesion-to-background elasticity ratio encountered during clinical …

Distribution, Abundance, And Diversity Patterns Of The Thermoacidophilic “Deep-Sea Hydrothermal Vent Euryarchaeota 2”, Gilberto Flores, Issac D. Wagner, Yitai Liu, Anna-Louise Reysenbach

Biology Faculty Publications and Presentations

Cultivation-independent studies have shown that taxa belonging to the “deep-sea hydrothermal vent euryarchaeota 2” (DHVE2) lineage are widespread at deep-sea hydrothermal vents. While this lineage appears to be a common and important member of the microbial community at vent environments, relatively little is known about their overall distribution and phylogenetic diversity. In this study, we examined the distribution, relative abundance, co-occurrence patterns, and phylogenetic diversity of cultivable thermoacidophilic DHVE2 in deposits from globally distributed vent fields. Results of quantitative polymerase chain reaction assays with primers specific for the DHVE2 and Archaea demonstrate the ubiquity of the DHVE2 at deep-sea vents …

A Laplace Pressure Based Microfluidic Trap For Passive Droplet Trapping And Controlled Release, Melinda Simon, Robert Lin, Jeffrey Fisher, Abraham Lee

Faculty Publications

Here, we present a microfluidic droplet trap that takes advantage of the net Laplace pressure force generated when a droplet is differentially constricted. Mathematical simulations were first used to understand the working range of the component; followed by finite element modeling using the CFDsoftware package to further characterize the behavior of the system. Controlled release of the trapped droplets is also demonstrated through both a mechanical method and a chemical method that manipulates the total pressure exerted on the trapped droplet. The unique design of this trapping device also provides the capability for selection of a single dropletfrom a train, …

Facilitating Preservice Teacher Induction Through Learning In Partnership, Briony Carter

Australian Journal of Teacher Education

Partnership in teacher education is usually seen as needing to occur between the university and a school. This teacher education program, however, considers partnership across many stakeholders, in addition: employer authorities, community agencies and pre-service teachers themselves as active partners. Using Wenger’s (1998) concept of communities of practice, this paper explores several action research cycles of a teacher educator, examining changing practices in a regional/rural initiative. The paper explores strategies at the university to promote induction into the profession, examples of university pedagogies to facilitate professional growth and understanding of professionalism, orientation to the regional community, orientation to the school, …

Issue 1

The Synapse: Intercollegiate science magazine

No abstract provided.

Lab Hierarchy: Undergrads Have More Power Than You Think, Hillary Mullan

The Synapse: Intercollegiate science magazine

No abstract provided.

Novel Magnetite-Producing Magnetotactic Bacteria Belonging To The Gammaproteobacteria, Christopher T. Lefèvre, Nathan Viloria, Marian L. Schmidt, Mihály Pósfai, Richard B. Frankel, Dennis A. Bazylinski

Physics

Two novel magnetotactic bacteria (MTB) were isolated from sediment and water collected from the Badwater Basin, Death Valley National Park and southeastern shore of the Salton Sea, respectively, and were designated as strains BW-2 and SS-5, respectively. Both organisms are rod-shaped, biomineralize magnetite, and are motile by means of flagella. The strains grow chemolithoautotrophically oxidizing thiosulfate and sulfide microaerobically as electron donors, with thiosulfate oxidized stoichiometrically to sulfate. They appear to utilize the Calvin–Benson–Bassham cycle for autotrophy based on ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) activity and the presence of partial sequences of RubisCO genes. Strains BW-2 and SS-5 biomineralize chains of octahedral …

Promoting Pre-Service Teachers’ Ideas About Nature Of Science Through Educational Research Apprenticeship, Gultekin Cakmakci

Australian Journal of Teacher Education

This study suggests a novel approach, which integrates an explicit-reflective nature of science (NOS) instruction into the teachers-as-researchers approach to improve pre-service science teachers’ conceptions of NOS. Participants were 48 university fourth-year students in a four-year pre-service science teacher-training program in Turkey. The participants received explicit-reflective NOS instruction and were introduced to some techniques for critically evaluating academic articles, designing and conducting a research project, writing a research report and preparing materials to share the findings of their studies with students and staff of their department at a poster conference. During these activities, the lecturer explicitly addressed the target aspects …

Developing An Integrated History And Future Of People On Earth (Ihope), Robert Costanza, Ida Kubiszewski, Scott Heckbert, Kathy A. Hibbard, Sander Van Der Leeuw, Steve Aulenbach, Simon Brewer, Michael Burek, Sarah Cornell, Carole L. Crumley, Lisa J. Graumlich, Michelle Hegmon, Stephen T. Jackson, Paul Sinclair, Sverker Sörlin, W. L. Steffen, Carl Folke, J. A. Dearing, Vernon Scarborough

Institute for Sustainable Solutions Publications and Presentations

The Integrated History and future of People of Earth (IHOPE) initiative is a global network of researchers and research projects with its International Program Office (IPO) now based at the Stockholm Resilience Center (SRC), Upsalla University, Arizona State University, Portland State University, and the Australian National University. Research linked to IHOPE demonstrates that Earth system changes in the past have been strongly associated with changes in the coupled human-environment system. IHOPE supports integrating knowledge and resources from the biophysical and the social sciences and the humanities to address analytical and interpretive issues associated with coupled human-earth system dynamics. This integration …

Functional, Cognitive And Psychological Outcomes, And Recurrent Vascular Events In Pakistani Stroke Survivors: A Cross Sectional Study., Maria Khan, Bilal Ahmed, Maryam Ahmed, Myda Najeeb, Emmon Raza, Farid Khan, Anoosh Moin, Dania Shujaat, Ahmed Arshad, Ayeesha Kamran Kamal

Department of Medicine

Background: There is little direct data describing the outcomes and recurrent vascular morbidity and mortality of stroke survivors from low and middle income countries like Pakistan. This study describes functional, cognitive and vascular morbidity and mortality of Pakistani stroke survivors discharged from a dedicated stroke center within a nonprofit tertiary care hospital based in a multiethnic city with a population of more than 20 million.

Methods: Patients with stroke, aged > 18 years, discharged alive from a tertiary care centre were contacted via telephone and a cross sectional study was conducted. All the discharges were contacted. Patients or their legal surrogate …

Save Our Sharks: Using International Fisheries Law Within Regional Fisheries Management Organizations To Improve Shark Conservation, Stijn Van Osch

Michigan Journal of International Law

Like many fish, sharks are facing unprecedented overfishing. They have been targeted both directly for their fins and caught accidentally (bycaught) in, for instance, tuna fisheries. This has led to collapsing stocks around the world. Overfishing has led to what has been termed a mass extinction among ocean species, and sharks are no exception-they are in fact especially vulnerable. As a result, many species of sharks are now listed on the Red List of the International Union for Conservation of Nature (IUCN). This problem can only be tackled through coordinated, cooperative action by all states. This Note explores one avenue …

The Development Of Resistance To Antibiotics From Bacteria Exposed To Triclosan And Triclocarban In Lake Ontario, Daniel Boone

Theses

Triclocarban (3,4,4'-trichlorocarbanilide) (TCC) and Triclosan ( 2,4,4'-trichloro-2'-hydroxydiphenyl ether) (TCS) are antimicrobials used extensively in soaps and detergents. They're known to bypass wastewater treatment plants and bioaccumulate in aquatic sediments. Their accumulation leads to an increase in bacterial exposure, which may lead to both antiseptic and antibiotic resistance, known as cross-resistance. This study investigates the occurrence of cross-resistance with bacteria exposed to TCS and TCC in Lake Ontario sediments. Sediment samples were chosen at various sites with a high probability of TCS and TCC exposure. The bacteria were enriched with 5mg/L TCS (equivalent to environmental concentrations) and the top biodegraders were …

Vulnerability To Extreme Heat In Metropolitan Phoenix: Spatial, Temporal, And Demographic Dimensions, Winston T. L. Chow, Wen-Ching Chuang, Patricia Gober

Research Collection School of Social Sciences

This study assessed the spatial distribution of vulnerability to extreme heat in 1990 and 2000 within metropolitan Phoenix based on an index of seven equally weighted measures of physical exposure and adaptive capacity. These measures were derived from spatially interpolated climate, normalized differential vegetation index, and U.S. Census data. From resulting vulnerability maps, we also analyzed population groups living in areas of high heat vulnerability. Results revealed that landscapes of heat vulnerability changed substantially in response to variations in physical and socioeconomic factors, with significant alterations to spatial distribution of vulnerability especially between eastern and western sectors of Phoenix. These …

Effect Of Temperature And Relative Humidity On The Development And Fecundity Of Chilo Partellus (Swinhoe) (Lepidoptera: Crambidae), A. Tamiru, E. Getu, B. Jembere, T. Bruce

All Peer-Reviewed Publications

The spotted stemborer, Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), is one of the most important insect pests attacking maize and sorghum in Ethiopia. Recent studies have indicated that the pest is spreading to new locations where it was not reported before. In the current study, laboratory investigations were carried out to determine the combined effect of different levels of relative humidity and temperature regimes on the development and fecundity of C. partellus, as these physical factors are known to play an important role in the life cycle of insects and adaptability to local climate. Developmental time, longevity, potential fecundity and realized …

February 2012 Newsletter, Career Center, Illinois Wesleyan University

Career Connections Newsletter

Issue Highlights:

• Intern Profile of Alex Sebens '13 and Sam McCormack '14
• Council of IWU Women Connects Students to Mentors
• The Professors' Perspective: Enhancing Education Through Internships

Assessment Of An Osteoblast-Like Cell Line As A Model For Human Primary Osteoblasts Using Raman Spectroscopy, Lindsay Mcmanus, Franck Bonnier, George Burke, Brian Meenan, Adrian Boyd, Hugh Byrne

Articles

Raman spectroscopy is employed to determine the suitability of the U20S osteoblast-like cell line for use as a model for human primary osteoblasts, with emphasis on the ability of these cell types to replicate their tissue of origin. It was found that both cell types demonstrated early stage mineral deposition that followed significantly different growth patterns. Analysis of the growth pattern and spectral data from primary cells revealed increasing bone quality ratios and a high crystallinity, consistent with previous reports. Conversely the investigation of the U20S osteoblast-like cell line provided evidence of dense multilayered mineralised regions that corresponded more closely …