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University of Dayton

2010

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Articles 1 - 11 of 11

Full-Text Articles in Life Sciences

Ecology And Transmission Of Buruli Ulcer Disease: A Systematic Review, Richard W. Merritt, Edward D. Walker, Pamela L. C. Small, John R. Wallace, Paul D. R. Johnson, Mark Eric Benbow, Daniel A. Boakye Dec 2010

Ecology And Transmission Of Buruli Ulcer Disease: A Systematic Review, Richard W. Merritt, Edward D. Walker, Pamela L. C. Small, John R. Wallace, Paul D. R. Johnson, Mark Eric Benbow, Daniel A. Boakye

Biology Faculty Publications

Buruli ulcer is a neglected emerging disease that has recently been reported in some countries as the second most frequent mycobacterial disease in humans after tuberculosis. Cases have been reported from at least 32 countries in Africa (mainly west), Australia, Southeast Asia, China, Central and South America, and the Western Pacific. Large lesions often result in scarring, contractual deformities, amputations, and disabilities, and in Africa, most cases of the disease occur in children between the ages of 4–15 years. This environmental mycobacterium, Mycobacterium ulcerans, is found in communities associated with rivers, swamps, wetlands, and human-linked changes in the aquatic environment, …


Dorsal Eye Selector Pannier (Pnr) Suppresses The Eye Fate To Define Dorsal Margin Of The Drosophila Eye, Sarah M. Oros, Meghana Tare, Madhuri Kango-Singh, Amit Singh Oct 2010

Dorsal Eye Selector Pannier (Pnr) Suppresses The Eye Fate To Define Dorsal Margin Of The Drosophila Eye, Sarah M. Oros, Meghana Tare, Madhuri Kango-Singh, Amit Singh

Biology Faculty Publications

Axial patterning is crucial for organogenesis. During Drosophila eye development, dorso-ventral (DV) axis determination is the first lineage restriction event. The eye primordium begins with a default ventral fate, on which the dorsal eye fate is established by expression of the GATA-1 transcription factor pannier (pnr). Earlier, it was suggested that loss of pnr function induces enlargement in the dorsal eye due to ectopic equator formation. Interestingly, we found that in addition to regulating DV patterning, pnr suppresses the eye fate by downregulating the core retinal determination genes eyes absent (eya), sine oculis (so) and dacshund (dac) to define the …


Pre-Swing Deficits In Forward Propulsion, Swing Initiation And Power Generation By Individual Muscles In Hemiparetic Walking, Carrie L. Peterson, Allison Kinney, Steven A. Kautz, Richard R. Neptune Aug 2010

Pre-Swing Deficits In Forward Propulsion, Swing Initiation And Power Generation By Individual Muscles In Hemiparetic Walking, Carrie L. Peterson, Allison Kinney, Steven A. Kautz, Richard R. Neptune

Mechanical and Aerospace Engineering Faculty Publications

Clinical studies of hemiparetic walking have shown pre-swing abnormalities in the paretic leg suggesting that paretic muscle contributions to important biomechanical walking subtasks are different than those of non-disabled individuals. Three-dimensional forward dynamics simulations of two representative hemiparetic subjects with different levels of walking function classified by self-selected walking speed (i.e., limited community=0.4–0.8 m/s and community walkers=>0.8 m/s) and a speed-matched control were generated to quantify individual muscle contributions to forward propulsion, swing initiation and power generation during the pre-swing phase (i.e., double support phase proceeding toe-off). Simulation analyses identified decreased paretic soleus and gastrocnemius contributions to forward propulsion …


A Major Role For Mammals In The Ecology Of Mycobacterium Ulcerans, Janet A. Fyfe, Caroline J. Lavender, Kathrine A. Handasyde, Alistair R. Legione, Carolyn R. O'Brien, Timothy P. Stinear, Sacha J. Pidot, Torsten Seemann, Mark Eric Benbow, John R. Wallace, Christina Mccowan, Paul D. R. Johnson Aug 2010

A Major Role For Mammals In The Ecology Of Mycobacterium Ulcerans, Janet A. Fyfe, Caroline J. Lavender, Kathrine A. Handasyde, Alistair R. Legione, Carolyn R. O'Brien, Timothy P. Stinear, Sacha J. Pidot, Torsten Seemann, Mark Eric Benbow, John R. Wallace, Christina Mccowan, Paul D. R. Johnson

Biology Faculty Publications

Background: Mycobacterium ulcerans is the causative agent of Buruli ulcer (BU), a destructive skin disease found predominantly in sub-Saharan Africa and south-eastern Australia. The precise mode(s) of transmission and environmental reservoir(s) remain unknown, but several studies have explored the role of aquatic invertebrate species. The purpose of this study was to investigate the environmental distribution of M. ulcerans in south-eastern Australia.


Relationships Between Muscle Contributions To Walking Subtasks And Functional Walking Status In Persons With Post-Stroke Hemiparesis, Allison Kinney, Carrie L. Peterson, Steven A. Kautz, Richard R. Neptune Aug 2010

Relationships Between Muscle Contributions To Walking Subtasks And Functional Walking Status In Persons With Post-Stroke Hemiparesis, Allison Kinney, Carrie L. Peterson, Steven A. Kautz, Richard R. Neptune

Mechanical and Aerospace Engineering Faculty Publications

Walking speed is commonly used to predict stroke severity and assess functional walking status (i.e., household, limited community and community walking status) post-stroke. The underlying mechanisms that limit walking speed (and functional walking status by extension) need to be understood to improve post-stroke rehabilitation. Previous experimental studies have shown correlations between paretic plantarflexor output during the pre-swing phase and walking speed and suggest that the paretic hip flexors can compensate in some hemiparetic subjects. Modeling and simulation studies of healthy walking have shown that the ankle plantarflexors, soleus (SOL) and gastrocnemius (GAS), and uniarticular hip flexors (IL) are essential contributors …


Adapting Biodegradable Oligo(Poly(Ethylene Glycol) Fumarate) Hydrogels For Pigment Epithelial Cell Encapsulation And Lens Regeneration, Mimi W. Zhang, Hansoo Park, Xuan Guo, Kenta Nakamura, Robert M. Raphael, F. Kurtis Kasper, Antonios G. Mikos, Panagiotis A. Tsonis Apr 2010

Adapting Biodegradable Oligo(Poly(Ethylene Glycol) Fumarate) Hydrogels For Pigment Epithelial Cell Encapsulation And Lens Regeneration, Mimi W. Zhang, Hansoo Park, Xuan Guo, Kenta Nakamura, Robert M. Raphael, F. Kurtis Kasper, Antonios G. Mikos, Panagiotis A. Tsonis

Biology Faculty Publications

This study investigated the encapsulation of newt iris pigment epithelial cells (PECs), which have the ability to regenerate a lens by trans-differentiation in vivo, within a biodegradable hydrogel of oligo(poly(ethylene glycol) fumarate) crosslinked with poly(ethylene glycol)-diacrylate. Hydrogel beads of initial diameter of 1mm were fabricated by a molding technique. The swelling ratio and degradation rate of the hydrogel beads decreased with increasing crosslinking ratios. Confocal microscopy confirmed the cytocompatibility of crosslinking hydrogel formulations as evidenced by the viability of an encapsulated model cell line within a crosslinked hydrogel bead. Hydrogel beads encapsulating iris PECs were also implanted into lentectomized newts …


A River Palimpsest: The Interdisciplinary Value Of Water, Katie Norris Apr 2010

A River Palimpsest: The Interdisciplinary Value Of Water, Katie Norris

Honors Theses

Water is an invaluable natural resource to both human and ecological communities, and is currently threatened by global and local pollution and availability. Hypoxia, climate change and local issues all strain river systems to beyond repair. In light of this, communities and scientists must come together to understand the quality and value of natural resources, such as the Great Miami River, in order to inform policy, management and societal perceptions. The overall purpose of this thesis research project is to utilize interdisciplinary areas together to create a valuable, spatially lateral and chronological baseline picture of the Great Miami River. The …


Expression Profiles During Dedifferentiation In Newt Lens Regeneration Revealed By Expressed Sequence Tags, Nobuyasu Maki, John Martinsou, Osamu Nishimura, Hiroshi Tarui, Jaroslaw Meller, Panagiotis A. Tsonis, Kiyokazu Agata Jan 2010

Expression Profiles During Dedifferentiation In Newt Lens Regeneration Revealed By Expressed Sequence Tags, Nobuyasu Maki, John Martinsou, Osamu Nishimura, Hiroshi Tarui, Jaroslaw Meller, Panagiotis A. Tsonis, Kiyokazu Agata

Biology Faculty Publications

Purpose: The adult newt can regenerate lens from pigmented epithelial cells (PECs) of the dorsal iris via dedifferentiation. The purpose of this research is to obtain sequence resources for a newt lens regeneration study and to obtain insights of dedifferentiation at the molecular level.


Tubulin Evolution In Insects: Gene Duplication And Subfunctionalization Provide Specialized Isoforms In A Functionally Constrained Gene Family, Mark G. Nielsen, Sudhindra R. Gadagkar, Lisa Gutzwiller Jan 2010

Tubulin Evolution In Insects: Gene Duplication And Subfunctionalization Provide Specialized Isoforms In A Functionally Constrained Gene Family, Mark G. Nielsen, Sudhindra R. Gadagkar, Lisa Gutzwiller

Biology Faculty Publications

Background: The completion of 19 insect genome sequencing projects spanning six insect orders provides the opportunity to investigate the evolution of important gene families, here tubulins. Tubulins are a family of eukaryotic structural genes that form microtubules, fundamental components of the cytoskeleton that mediate cell division, shape, motility, and intracellular trafficking. Previous in vivo studies in Drosophila find a stringent relationship between tubulin structure and function; small, biochemically similar changes in the major alpha 1 or testis-specific beta 2 tubulin protein render each unable to generate a motile spermtail axoneme. This has evolutionary implications, not a single non-synonymous substitution is …


The Power Of Empowerment: An Icf-Based Model To Improve Self-Efficacy And Upper Extremity Function Of Survivors Of Breast Cancer, Mary Insana Fisher, Dana Howell Jan 2010

The Power Of Empowerment: An Icf-Based Model To Improve Self-Efficacy And Upper Extremity Function Of Survivors Of Breast Cancer, Mary Insana Fisher, Dana Howell

Physical Therapy Faculty Publications

Breast cancer is one of the most frequently diagnosed cancers among women. Breast cancer treatments often negatively impact the function of the arm, and quality of life and upper extremity function does not always return to a prediagnosis level. Survivors of breast cancer may also experience feelings of diminished self-efficacy related to functional deficits resulting from their physical limitations. The International Classification of Functioning (ICF) provides a framework for rehabilitation practitioners to address physical and psychological impairments, activity limitations, and participation restrictions. Patient outcomes may be improved by fostering self-efficacy through empowerment. This paper explores how the ICF model and …


The Influence Of Title Ix On Personal And Professional Biographies Of Early Career Female Club Volleyball Coaches, Dennis Dahlberg, George M. De Marco, Corinne M. Daprano, Carolyn Ridenour Jan 2010

The Influence Of Title Ix On Personal And Professional Biographies Of Early Career Female Club Volleyball Coaches, Dennis Dahlberg, George M. De Marco, Corinne M. Daprano, Carolyn Ridenour

Health and Sport Science Faculty Publications

Seeking to understand the relationship between Title IX and its impact on a select group of its contemporary beneficiaries, the purpose of this study was to determine the influence of Title IX on the personal and professional biographies of 8 early career female club volleyball coaches. This study utilized a modified case study design featuring constant comparison data analysis. Data were collected using a qualitative interview technique with each of the candidate’s interviews subdivided into four distinct sections. Part I of the interview established a basic personal and professional biography of each individual coach. Part II provided data on the …