Clinton S. Willson

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Dedication To my parents iii Acknowledgments First, I thank God for giving me the ability to finish this work. His insight, encouragement, dedication, and great personality helped me throughout this research. I am greatly thankful for him. I appreciate their fruitful discussions. Two close friends provided me with unlimited support: Carla Willaims and(More)
Pore-scale processes govern fundamental behavior in multiphase porous media systems. A high-resolution, three-dimensional image of the interior of a multiphase porous media system was obtained using synchrotron X-ray tomography. The system was imaged at a resolution of 12.46 mum following entrapment of the nonwetting phase at residual saturation. First, the(More)
ii ACKNOWLEDGEMENTS I begin by thanking my adviser, Dr. Chunyan Li, whose teaching skills and hard work set an example that will be hard to forget. His patience and guidance were very much appreciated during my years at LSU. I am also grateful to the other committee members, Drs. Jaye Cable, discussions about the code, and Mr. Imtiaz Hossain (LSU's Shell(More)
Cytohistochemical staining and RNase-gold labelling have been applied to root-tip meristematic cells of Vicia faba to study the origin and biological significance of 2 types of inclusions: one seen in the nucleoplasm and the other in the cytoplasm of early telophase cells. They have been termed "dense bodies" and "cytoplasmic nucleolus-like bodies" (NLB),(More)
Retention and transport of colloids and microorganisms are complex processes, especially in the vadose zone due to the more complicated water flow regime and additional interfacial reactions involved. In this study, we examined the retention and transport behavior of two bacteriophages, MS-2 and phiX174, in homogeneous and chemically heterogeneous media(More)
This study evaluates the pore-scale distribution of silver nanoparticles during transport through a sandy porous medium via quantitative synchrotron X-ray computed microtomography (qSXCMT). The associated distributions of nanoparticle flow velocities and mass flow rates were obtained by coupling these images with computational fluid dynamic (CFD)(More)
BACKGROUND, AIM, AND SCOPE The Lower Mississippi River is a major transportation route for commercial goods and petroleum products produced and refined locally. Oil spills caused by vessel accidents and equipment failure at refineries are a serious threat to the drinking water supply of Southern Louisiana, as well as to the many natural, economic, and(More)
Under certain conditions, oil droplets that have separated from the main oil slick may become coated by suspended sediments forming oil-mineral aggregates (OMAs). The formation of these aggregates depends on suspended particulate characteristics, temperature, salinity, mixing energy, droplet size and number, and oil properties. The OMAs do not re-coalesce(More)