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Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Assessment Of The Freshwater Mussel Community Of The Upper Mahoning River Watershed And Factors Influencing Diversity And Abundance In Small Streams, Matthew T. Begley
Assessment Of The Freshwater Mussel Community Of The Upper Mahoning River Watershed And Factors Influencing Diversity And Abundance In Small Streams, Matthew T. Begley
ETD Archive
Freshwater mussel communities have experienced drastic declines in diversity and abundance in many streams throughout North America. Among the reasons for these declines is the human-driven alteration of the landscape, as urban and agricultural use impart many known stressors to aquatic systems. Impairments include increased sedimentation, increased pollutants, increased flood frequency and intensity, and decreased diversity and abundance of many organisms, including fish, macroinvertebrates, and mussels. Attempts to explain the abundance and diversity of mussel communities using small-scale factors such as substrate type and flow velocity provided little to no predictive power. Instead, reach-scale variables, such as stream morphology and …
Characterization Of Cold Drawn Poly L Lactic Acid By Raman Spectroscopy And Raman Hyperspectral Imaging, Ramya Sudha Muttavarapu
Characterization Of Cold Drawn Poly L Lactic Acid By Raman Spectroscopy And Raman Hyperspectral Imaging, Ramya Sudha Muttavarapu
ETD Archive
Artificial modulation of bone growth and repair processes is an important area of current research. Studies have established that the micro mechanical and bulk physical properties of a polymer implant influence its performance behavior and degradation patterns in the body. One important parameter for the class of polymers known as polylactides is the degree of crystalline character. Hence, studying the bulk and micro crystalline composition of an important polymer implant, Poly-L-Lactic acid is the objective of this study. Poly-L-Lactic acid has elastic properties that can be tailored to resemble natural bone and its reaction to mechanical stress. Varying degrees of …
Anthropogenic Impacts As Revealed From Sediment Cores From Punderson Lake Ohio, Ronald A. Van Blarcum
Anthropogenic Impacts As Revealed From Sediment Cores From Punderson Lake Ohio, Ronald A. Van Blarcum
ETD Archive
Sediment core archives provide a history of data useful for serving as a long-term monitoring reserve to evaluate chronological events of contamination to lake systems. This could be an effective tool for continual environmental management, monitoring and potential restoration efforts. This method is also very cost-effective without the addition of a water quality monitoring station on site. Taking 3 sediment cores from Punderson Lake Ohio for analysis has allowed associating variations in select metals to anthropogenic events or activities we can determine a time frame with limited uncertainty and resolve the intensity of anthropogenic contamination to the lake starting with …