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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Temperature Effects On The Development Of The Axial Skeleton And Body Shape In Astyanax Mexicanus (Teleostei: Characidae), Joseph David Forberg
Temperature Effects On The Development Of The Axial Skeleton And Body Shape In Astyanax Mexicanus (Teleostei: Characidae), Joseph David Forberg
College of Science and Health Theses and Dissertations
Humans are causing large-scale changes in environmental conditions across the planet including in temperature. Changes in the environmental conditions can lead to phenotypic changes in ectotherms that affect adaptively important traits like body shape and the axial skeleton. Previous studies have shown that temperature changes during development significantly affects body shape and vertebral number in the Mexican tetra Astyanax mexicanus. How these changes arise early in development is not clear. In this study, I examine how changes in developmental temperature affect body shape in larval and juvenile fish, the order of ossification of elements of the axial skeleton, the size …
Characterization Of A Stenotrophomonas Maltophilia Bacteriophage, Edward Eshoo
Characterization Of A Stenotrophomonas Maltophilia Bacteriophage, Edward Eshoo
College of Science and Health Theses and Dissertations
Stenotrophomonas maltophilia is a ubiquitous Gram-negative, multidrug resistant, opportunistic bacterial pathogen that causes various infections in humans. Recently, the use of bacteriophages as therapeutic agents, has gained interest as an alternative to traditional antibiotics. This thesis describes the isolation, purification, and characterization of S. maltophilia bacteriophage Bfi2 and discusses its activity against related, and often co-isolated, bacterial pathogens. Amplification of the phage resulted in clear, well-defined plaques and a titer of 1.73 ± 0.38 x 1011 PFU/ml. Bfi2 demonstrated the ability to lyse 55% of the S. maltophilia strains tested, suggesting that it has a moderate host range. However, the …
Niche Overlap In Sympatric Rocio (Teleostei: Cichlidae) Of Guatemala, Cesar Estuardo Fuentes Montejo
Niche Overlap In Sympatric Rocio (Teleostei: Cichlidae) Of Guatemala, Cesar Estuardo Fuentes Montejo
College of Science and Health Theses and Dissertations
Rocio is a small genus of Neotropical freshwater fishes that is distributed in Atlantic drainages of northern Middle America. Two species in the genus exhibit sympatry in the Río Dulce basin (in Izabal, Guatemala), where one species is endemic (R. spinosissima), while the other only includes this area as part of a larger geographic range (R. octofasciata). Unfortunately, the ecology of these species has been poorly studied. This study sought to determine the ecological and morphological differences between these two closely related sympatric freshwater fishes. We hypothesized that R. octofasciata would exhibit greater ecological and morphological …
Stratospheric Effects On Uv, Speed Of Sound, Pressure, And Temperature, Joshua V. Chis, Joana Diaz, Brianna E. Ortiz, Imani G. Robertson, Jelani A. Shadd
Stratospheric Effects On Uv, Speed Of Sound, Pressure, And Temperature, Joshua V. Chis, Joana Diaz, Brianna E. Ortiz, Imani G. Robertson, Jelani A. Shadd
DePaul Discoveries
The atmosphere is composed of several layers, each with its own distinct environment varying in temperature, pressure, and levels of UV radiation. Quantifying these varying parameters proves to be useful in understanding atmospheric composition in greater detail. Variance in the composition of the atmosphere allows for the study of the evolution of physical phenomena at different altitudes. Our group quantified this variance using a high-altitude weather balloon and designed an experimental method to observe the nature of sound propagation through varying altitudes. The goal was to develop an altitude-dependent model of the speed of sound by using an open-air, microcontroller-based …
What's In Your Soil? A Comparative Assessment Of Total Lead In Soils In Southwest Side And North Side Chicago Communities, Jennifer Garcia
What's In Your Soil? A Comparative Assessment Of Total Lead In Soils In Southwest Side And North Side Chicago Communities, Jennifer Garcia
DePaul Discoveries
In Chicago, city officials continue to locate polluting industries in predominately Black and Hispanic/Latinx neighborhoods. Lower income families are disproportionately exposed to greater amounts of toxic chemicals such as lead (Pb). While the City of Chicago focuses its effort in removing industrial sites from the North Side, a predominately white community area, sources of industrial pollution are more likely to be found in communities of color. Due to the prevalent sources of Pb on the Southwest side, residential soil is often highly disturbed and contaminated. Pb is a serious neurotoxin, and ingestion or inhalation of Pb contaminated soil and dust …
Effects Of Elevated Co2 Concentrations And Elevated Temperatures On Isoprene Emissions Of Rhamnus Cathartica (European Buckthorn), Quercus Rubra (Red Oak) And Quercus Michauxii (Swamp Chestnut Oak), Janet G. Núñez
DePaul Discoveries
Tropospheric ozone is a ground-level pollutant and is produced from primary air pollutants like nitrogen oxides and volatile organic compounds (VOCs). While many VOCs are anthropogenic, isoprene is emitted from certain species of plants and reacts with nitrogen oxides to form ozone. Previous studies have found that isoprene can be suppressed by CO2, but such suppression can be reduced under conditions of increased temperature. However, this pattern is not seen in all plants capable of emitting isoprene. The focus of this is study is to determine if similar patterns are present in the invasive tree species of buckthorn …
Atmospheric Phosphorus Deposition Into A Fresh Water Wetland: Prairie Wolf Slough Restored Wetland, Isaac B. Daitzchman
Atmospheric Phosphorus Deposition Into A Fresh Water Wetland: Prairie Wolf Slough Restored Wetland, Isaac B. Daitzchman
DePaul Discoveries
Phosphorus is a major element needed for plant growth. Excess phosphorus from agricultural runoff and urban stormwater can enter waterways, resulting in growth of toxic algal blooms that are deleterious to local fauna. One way to remove phosphorus is by diverting agricultural and urban runoff into wetlands. One such wetland is Prairie Wolf Slough (PWS), located in north suburban Chicago, IL. Stormwater enters PWS through an inlet channel and exits through an outlet pipe into the Chicago River. A 16-year study documented that a significantly greater mass of phosphorus leaves PWS than enters through the inlet. This study accounted for …
Synthesis Of Triaminopyrimidine Derivatives For Inhibition Of Inflammatory Caspases, Marianna C. Haddad, Caitlin Karver
Synthesis Of Triaminopyrimidine Derivatives For Inhibition Of Inflammatory Caspases, Marianna C. Haddad, Caitlin Karver
DePaul Discoveries
Caspases are cysteine-dependent aspartic proteases whose functions are connected to different mechanisms of cell death and inflammation. As caspase-1 plays a significant role in the immune response, its activity has been of interest as a target for inhibitor development as its inhibition will reduce the levels of pro-inflammatory cytokines in inflammatory diseases, thus minimizing the symptoms that arise and serving as a possible therapeutic approach. Prior work discovered a family of potent inhibitors of caspase-1 with a common triaminopyrimidine scaffold. To further explore structure-activity relationship profiles of potential inhibitors of caspase-1, two different syntheses were attempted to create two new …
Optimization Of Dye Molecules For Use In Studying Inflammatory Caspase Enzymes, Josiah D. Stewart, Phasu Sirinit
Optimization Of Dye Molecules For Use In Studying Inflammatory Caspase Enzymes, Josiah D. Stewart, Phasu Sirinit
DePaul Discoveries
Inflammatory caspases are important enzymes in the initial immune response to pathogens. A common method of studying caspase activity is through the use of fluorogenic assays, in which the cleavage of a substrate by an enzyme results in the emission of fluorescence. Fluorogenic assays require the use of fluorophores: molecules that will fluoresce upon the cleavage of a substrate. Different fluorophores have different characteristics, and these characteristics can be analyzed in order to determine which fluorophores will be most suitable for activity assays. Two commercially available fluorophores were compared for use in fluorogenic assays of inflammatory caspases: MCA and EDANS. …
Depaul Discoveries Volume 11 Cover Art, Dina Khdair
Depaul Discoveries Volume 11 Cover Art, Dina Khdair
DePaul Discoveries
No abstract provided.
Hiding Behind The Title: Bridging The Gap Between Identity And Leadership Through Neuroscience, Emotional Intelligence And Ethical Management, Alicia S. Huddleston
Hiding Behind The Title: Bridging The Gap Between Identity And Leadership Through Neuroscience, Emotional Intelligence And Ethical Management, Alicia S. Huddleston
College of Education Theses and Dissertations
Leadership is the key determinant in the success of any organization, and leaders have an immeasurable impact on the lives and performances of those they have been entrusted to develop, support and lead. School principals are an integral part of the leadership tapestry within society and many people have been impacted by a school principal. Often enough, there are individuals who lead with or behind their title versus understanding first who they are intrinsically, and then working through those dynamics to effectively lead their own lives. When leaders are able to do this, then and only then are they equipped …