Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Clemson University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 4411 - 4440 of 6179

Full-Text Articles in Entire DC Network

Chitosan Derivatives For Tissue Engineering, Yongzhi Qiu Aug 2008

Chitosan Derivatives For Tissue Engineering, Yongzhi Qiu

All Dissertations

Chitosan, a naturally occurring polysaccharide, and its derivatives have been widely explored for biomedical applications due to their biocompatibility and biodegradability. In our studies, we developed a series of chitosan derivatives through chemical modifications. These chitosan derivatives not only possess better processibility in scaffolds fabrication, but also show excellent potentials in tissue engineering applications, including blood vessel and bone tissue engineering.
The excellent antithrombogenic property is crucial for vascular engineering applications, especially in engineering small-diameter blood vessels. In our studies, chitosan was chemically modified by phthalization and the phthalized chitosan exhibited great antithrombogenic property. Through a wet- phase-inversion process, tubular …

Go to article

Functionalized Carbon Nanotubes For Biological Applications, Lingrong Gu Aug 2008

Functionalized Carbon Nanotubes For Biological Applications, Lingrong Gu

All Dissertations

Carbon nanotubes with their unique pseudo-one-dimensional nanostructures and related electronic, optical, and mechanical properties have been attracting much attention for potential biological applications, such as biosensors, bio-delivery, bioimaging and so on. In this dissertation, recent studies and advances toward bioapplications of carbon nanotubes are critically reviewed, followed by detailed reports on my research projects concerning the use of carbon nanotubes as unique scaffolds for multivalent display of sugars and the relevant results from bio-evaluation of these novel nanomaterials.
Single-walled (SWNTs) and multiple-walled carbon nanotubes (MWNTs) were functionalized with amine-derivatived monosaccharides (galactoses and mannoses) and their dendritic constructs. These sugar-functionalized carbon …

Go to article

Youth Assets And Sexual Activity Among Hispanic Youth, Sharon Rodine, Roy F. Oman, Eleni Tolma, Cheryl B. Aspy Aug 2008

Youth Assets And Sexual Activity Among Hispanic Youth, Sharon Rodine, Roy F. Oman, Eleni Tolma, Cheryl B. Aspy

Journal of Youth Development

Hispanic females, ages 15-19, experienced the highest birth rates and smallest decline in birth rates over the past decade compared to youth of other racial/ethnic groups. This study’s purpose was to investigate relationships among a series of protective factors, or youth assets, and sexual activity in the Hispanic/Latino youth population. Data were collected from Hispanic youth and their parents (N=232 youth/parent pairs) in randomly selected households using in-person, in-home interview methods. Independent variables were nine youth assets; “never had sexual intercourse” was the dependent variable. Data were analyzed using logistic regression analysis. Three assets were found to be significantly associated …

Go to article

Crumb Rubber As A Sorption Medium For Ethylbenzene In Aqueous Solution, Carmen Grayson Aug 2008

Crumb Rubber As A Sorption Medium For Ethylbenzene In Aqueous Solution, Carmen Grayson

All Theses

Scrap tires have always been an environmental concern. In 2005, more than 299 million scrap tires were generated in the U.S., 259 million of which were utilized in the end-use scrap tire markets such as: tire-derived fuel generation, civil engineering applications, and ground rubber applications. The different applications and usages in the scrap tire market have helped utilize up to 87% of annually generated scrap tires in the U.S. Sixteen percent of the scrap tires were utilized in civil engineering applications in 2005 because of their beneficial properties for vibration and sound control, lightweight fill, drainage and collection for underground …

Go to article

Measuring The Influences Of Youth Participation In Ohio 4-H Camps, Greg Homan, Jason Hedrick, Jeff Dick Aug 2008

Measuring The Influences Of Youth Participation In Ohio 4-H Camps, Greg Homan, Jason Hedrick, Jeff Dick

Journal of Youth Development

Findings from a multi-component 4-H camp marketing and enrollment study of Ohio 4-H camps are highlighted. Significant influencers on the camp enrollment decision (parents, other adults, peers, siblings, and the respective camper) are evaluated as well as the effectiveness of various marketing techniques. The data found in this study indicates that the decision to enroll in camp is most influenced by the respective 4-H camper; however parents are also a strong factor in the choice to participate in 4-H camps. Alumni parents report significantly higher influence in the camp enrollment decision than those parents who are not alumni of 4-H. …

Go to article

2008 Summary Report On Institutional Effectiveness, Clemson University Aug 2008

2008 Summary Report On Institutional Effectiveness, Clemson University

Institutional Effectiveness Reports

No abstract provided.

Go to article

Spatial Variability Of Radionuclide Distribution Coefficients At The Savannah River Site And The Sub-Surface Transport Implications, Kelly Grogan Aug 2008

Spatial Variability Of Radionuclide Distribution Coefficients At The Savannah River Site And The Sub-Surface Transport Implications, Kelly Grogan

All Theses

Distribution coefficients, Kd, were measured for a suite of gamma-emitting radionuclides in uncontaminated soils from the E-Area burial grounds at the Savannah River Site. The objectives of the study were to (1) characterize the spatial variability of Kd, (2) evaluate the effect of spatial variability on vadose zone transport, and (3) develop statistical models for predicting Kd from physical or chemical characteristics.
Equilibrium batch sorption tests were performed on 27 soil samples collected from depths ranging from 11 ft to 100 ft from the BGO-3A core with 241Am, 109Cd, 139Ce, 137Cs, 57Co, 60Co, 203Hg, 85Sr, and 88Y. Distribution coefficients were …

Go to article

A Comparison Of Sequential And Integrated Data Fusion For Estimating Hydrologic Properties During A Synthetic Gpr Monitored Infiltration Event, Guy Sicilia Jr Aug 2008

A Comparison Of Sequential And Integrated Data Fusion For Estimating Hydrologic Properties During A Synthetic Gpr Monitored Infiltration Event, Guy Sicilia Jr

All Theses

Constraining parameters that govern variably saturated flow is important for applications ranging from quantifying water availability for ecosystems to constraining recharge rates and contaminant fluxes to groundwater. In this study I explore the effectiveness of sequential versus integrated data fusion for estimating unsaturated flow parameters using ground penetrating radar (GPR) data. In Sequential Data Fusion (SDF), geophysical imaging is used to create a map of the geophysical properties of the subsurface. These properties are then transformed to hydrologic properties that can be used to constrain an independent hydrologic inverse problem. In contrast, Integrated Data Fusion (IDF) uses the geophysical data …

Go to article

Online Travel Information Search Behaviors: An Information Foraging Perspective, Evan Jordan Jul 2008

Online Travel Information Search Behaviors: An Information Foraging Perspective, Evan Jordan

All Theses

Information search has been a topic of research for a multitude of studies across
several fields, including travel and tourism. However, information search on the internet,
especially in travel and tourism, has rarely been examined. As a result, this research was
undertaken to explore travel information search behaviors on the Internet.
This thesis uses information foraging theory (Pirolli & Card, 1999) as a basis to
examine online travel information search behaviors. In addition, other established
measures of online information search (Hodkinson, Kiel, & McColl-Kennedy, 2000)
were used to supplement findings based upon information foraging theory. Groups of
students from two …

Go to article

Scale-Up And Characterization Of An Enrichment Culture For Bioaugmentation Of The P-Area Chlorinated Ethene Plume At The Savannah River Site, Ashley Eaddy Jul 2008

Scale-Up And Characterization Of An Enrichment Culture For Bioaugmentation Of The P-Area Chlorinated Ethene Plume At The Savannah River Site, Ashley Eaddy

All Theses

Bioaugmentation has become an increasingly popular remediation strategy for groundwater sites contaminated with chlorinated solvents. When biostimulation is not an option due to the lack of necessary microorganisms required for dechlorination of the contaminants, bioaugmentation is an attractive option for remediation. The P-Area groundwater plumes at the Savannah River Site (SRS) are just such a case. The P-Area site is contaminated with tetrachloroethene (PCE), trichloroethene (TCE), and cis-dichloroethene (cDCE), and no dechlorination past cDCE is occurring. A similar site, the C-Area site, is near one of the P-Area site's source zones but displays complete reduction of TCE to ethene. …

Go to article

Assessment Of A Pilot Nutrition Education Program For Hispanic Youth And Their Parents, Maria Rossi Jul 2008

Assessment Of A Pilot Nutrition Education Program For Hispanic Youth And Their Parents, Maria Rossi

All Theses

Obesity and overweight are increasing at epidemic proportions in South Carolina for both adults and children, particularly affecting minority groups. Hispanic populations residing in South Carolina are not the exception. It is important to provide nutrition education, exercise, and behavior interventions as they are the foundations to treat parents and children who are overweight, obese, or are at risk for overweight and obesity. This study used quantitative and qualitative methods to examine the effectiveness of a nutrition and physical activity program, 'Jump into Food and Fitness' with the Hispanic population and to determine the effectiveness of the program on knowledge, …

Go to article

The Application Of Bacteriophage For The Elimination Of Pathogenic Bacteria In Compost, Spencer Heringa Jul 2008

The Application Of Bacteriophage For The Elimination Of Pathogenic Bacteria In Compost, Spencer Heringa

All Theses

The demand for organically grown produce is rapidly rising in the United States, resulting in a resurgence of natural fertilizers, such as animal waste, being used in agriculture. Currently, there are guidelines set by the USDA for the proper processing of fecal materials through composting; however food-borne illnesses associated with fresh-produce have become more and more common. Research is being conducted toward developing more effective treatments of fecal waste to reduce the survival of harmful bacteria. One possible form of treatment is through the use of bacteriophages that are able to 'seek and destroy' specific bacteria. The objectives of this …

Go to article

Investigation Of A Photosynthetically Aerated Cathode In A Mfc, Derek Little Jul 2008

Investigation Of A Photosynthetically Aerated Cathode In A Mfc, Derek Little

All Theses

A microbial fuel cell (MFC) creates an environment that facilitates the conversion of electron donor compounds into electrical current through the oxidizing powers of microbial growth. Within the anode of a MFC bacteria grow oxidizing organic compounds while in the cathode oxygen is reduced. The goal of a MFC is to achieve respiration under anaerobic conditions having electrodes serve as intermediate electron acceptor for bacteria in the anode and shuttle electrons through a circuit to the cathode reducing a terminal electron acceptor.
Waste from the biological production of hydrogen from agricultural peach was explored for use within the anode of …

Go to article

Perceiving Aperture Widths During Teleoperation, Suzanne Butler Jul 2008

Perceiving Aperture Widths During Teleoperation, Suzanne Butler

All Theses

When teleoperating robots it is often difficult for operators to perceive aspects of remote environments within which they are working (Tittle, Roesler, & Woods, 2002). It is difficult to perceive the sizes of objects in remote environments and to determine if the robot can pass through apertures of various sizes (Casper & Murphy, 2003; Murphy 2004). The present experiment investigated whether remote perception could be improved by providing optic flow during robot movement or by positioning an on-board camera so that the forward portion the robot is in the camera's view. Participants judges the sizes of remote apertures viewed through …

Go to article

Sequencing, Sub-Cloning, Expression And Purification Of 2-Hydroxychromene-2-Carboxylate Isomerase From Sphingomonas Paucimobilis Epa505, Aaron Brown Jul 2008

Sequencing, Sub-Cloning, Expression And Purification Of 2-Hydroxychromene-2-Carboxylate Isomerase From Sphingomonas Paucimobilis Epa505, Aaron Brown

All Theses

Polyaromatic hydrocarbons (PAHs) are ubiquitous toxic pollutants that are slow to degrade naturally and costly to remediate artificially. Several species of bacteria have been shown to degrade PAHs, including Sphingomonas paucimobilis EPA505. The aerobic bacterial catabolism of the PAH naphthalene has been studied in several PAH metabolizing bacteria but never in EPA505. This study addresses this deficiency by identifying and characterizing one of the genes for naphthalene metabolism--nahD. NahD codes for the enzyme 2-hydroxychromene-2-carboxylate (HCCA) isomerase, which is the fourth of six enzymes in the upper catabolic pathway of naphthalene.
In this study, the gene nahD is identified …

Go to article

Dendrimer Supramolecular Assembly For Gene Delivery, Karthikeyan Pasupathy Jul 2008

Dendrimer Supramolecular Assembly For Gene Delivery, Karthikeyan Pasupathy

All Theses

Dendrimers have found many applications in the fields of polymer science, biophysics, nanomedicine and the petroleum industry. Poly(amidoamine) (PAMAM) was studied as a model dendrimer and squalane as a model hydrocarbon. The interaction between PAMAM and squalane is pH dependent. Specifically, at low or neutral pH the squalane is found on the periphery of the PAMAM while at high pH the hydrocarbon is entrapped inside the PAMAM molecules.

Single-molecule fluorescence revealed that the interaction between PAMAM and squalane is reversible. At a pH value of 8, the time constants for the approaching, binding and dissociation of single PAMAM to squalane …

Go to article

An Examination Of The Motivations Of Sporting Event Volunteers At Clemson University, Blair Schuyler Jul 2008

An Examination Of The Motivations Of Sporting Event Volunteers At Clemson University, Blair Schuyler

All Theses

In 2006, The Corporation for National and Community Service partnered with the Bureau of Labor Statistics to add a volunteer section to the Current Population Survey (CPS) that is sent out to 60,000 households each year. That year it was reported that 61.2 million people volunteered their time, effort, and labor through or for an organization. An additional 5.3 million people did volunteer work informally through helping their communities. Organizations across the world, specifically sports organizations, rely heavily on volunteers for success. Volunteers at the 2004 Summer Olympics (45,000), based off the assumption of working a full 8 hour for …

Go to article

Remchlor Model Of Tritium Transport At The Made Site, Shelly Tyre Jul 2008

Remchlor Model Of Tritium Transport At The Made Site, Shelly Tyre

All Theses

Groundwater transport models are commonly used at sites with groundwater contamination. Models are used to study the extent of the contamination and the possible risks it poses. Contaminant transport models use properties of the aquifer and the solute to simulate how the solute moves through the aquifer. Screening level models are often used as a first modeling approach at sites to get an idea of the general trends of contaminant transport. They offer an efficient approach to modeling, usually requiring fewer input parameters than other models.
This study uses a screening level model to describe tritium transport for the second …

Go to article

Developing A Medically Informative And Socially Supportive Interactive Online Network (Mission), Katherine Adams Jul 2008

Developing A Medically Informative And Socially Supportive Interactive Online Network (Mission), Katherine Adams

All Theses

This thesis discusses virtual communities and social networks and their current and potential uses in health and medicine, proposing a novel virtual health network called a 'Medically Informative and Socially Supportive Interactive Online Network' (MISSION). The purposes of a MISSION are to 1) serve as an information resource for patients, 2) to facilitate conversation between patient and provider, 3) to potentially aid in office tasks (such as scheduling, billing, etc.), and 4) to aid in community-building acts in patients' own local, physical communities. In this thesis, the concept of virtual communities and social networks are explored, the legal and ethical …

Go to article

Water Levels Effects On Overall Customer Satisfaction:, Crayton Pruitt Jul 2008

Water Levels Effects On Overall Customer Satisfaction:, Crayton Pruitt

All Theses

Abstract The combination of hydroelectric power generation and the amount of precipitation results in fluctuating water levels on the United States Army Corps of Engineers: Lake Hartwell. Beginning in 2002 and continuing to the end of survey year 2004, water levels ranged from approximately ten feet below full pool to within half a foot under full pool. These fluctuations created difficulty for adjacent landowners to access sufficient water depths for recreational needs. The problems were magnified by a common perception that neighboring lakes', Lake Keowee and Lake Thurmond, water levels had not dropped as dramatically. This study examined the effects …

Go to article

Clemson Trustees Minutes, 2008 July 18, Clemson University Board Of Trustees Jul 2008

Clemson Trustees Minutes, 2008 July 18, Clemson University Board Of Trustees

Minutes

Minutes: Meeting of the Clemson University Board of Trustees. Poinsett Ballroom, Westin Poinsett Hotel, Greenville, SC. 9:00 a.m.

Go to article

The Electrical Characterization Of Tantalum Capacitors As Mis Devices, Brian Holman Jun 2008

The Electrical Characterization Of Tantalum Capacitors As Mis Devices, Brian Holman

All Theses

Electrical characteristics of a new class of tantalum capacitor are presented. Specifically, this type of tantalum capacitor is manufactured by KEMET Electronics Corporation and utilizes Poly(3,4-ethylenedioxythiolphene) (PEDOT) as the cathode material. There are two capacitor varieties based on the polymerization method used for the PEDOT. One uses In-Situ polymerization, and the other uses Pre-Polymerization. Existing polymer Ta capacitors use In-Situ polymerization while Pre-Polymerization is a new technique of cathode application. We investigated both types of devices to determine what, if any, performance benefits were gained by using Pre-Poly.
In a basic form Ta capacitors consist of a Ta anode, Ta2O5 …

Go to article

Building A Knowledge Economy Index For The Fifty States With A Focus On South Carolina: The Clemson Knowledge Economy Index, Tate Watkins Jun 2008

Building A Knowledge Economy Index For The Fifty States With A Focus On South Carolina: The Clemson Knowledge Economy Index, Tate Watkins

All Theses

This paper seeks to express the relevance of the knowledge economy to economic growth and development and to demonstrate the construction of a knowledge economy index for the fifty states, with a focus on South Carolina. The effort involves a survey of economic literature, reports and indexes related to the knowledge economy. Once significant knowledge economy indicators are identified, regression analysis is performed to select the most promising indicators for use as variables in the index. Statistical testing is also used to determine weights for index components. The thesis project was supported by the South Carolina Research Authority, an organization …

Go to article

Protein Interactions With Mixed Poly(Ethylene Glycol)/Polyacrylic Acid Brushes, Zhenqing Li Jun 2008

Protein Interactions With Mixed Poly(Ethylene Glycol)/Polyacrylic Acid Brushes, Zhenqing Li

All Theses

Tethered polymer chains that are grafted to a solid substrate by one chain end (polymer brushes) may be distinguished from other anchored polymer layers by the relatively high grafting densities gained. Potential uses of polymer brushes for interfacial modification to regulate interactions between proteins and substrates, such as drug delivery and protein separation, are widely recognized. Therefore, it is important to investigate interactions between proteins and surfaces modified with a polymer brush.
In this study, the 'grafting-to' method has been used to graft mixed poly(ethylene glycol) (PEG) and polyacrylic acid (PAA) brushes onto poly(glycidyl methacrylate) (PGMA)-modified silicon wafers/glass slides to …

Go to article

Secondary Metabolism Inducing Treatments During In Vitro Development Of Turmeric (Curcuma Longa L.) Rhizomes, Matthew M. Cousins, Jeffrey W. Adelberg, Feng Chen, James Rieck Jun 2008

Secondary Metabolism Inducing Treatments During In Vitro Development Of Turmeric (Curcuma Longa L.) Rhizomes, Matthew M. Cousins, Jeffrey W. Adelberg, Feng Chen, James Rieck

Publications

Turmeric (Curcuma longa L.) plants that were grown in vitro for 17 or 22 weeks as a fed-batch culture in 2.5 L vessels yielded 39 to 43 g and 62 to 70 g of fresh rhizomes per vessel, respectively (95 % confidence interval). The MS liquid medium was maintained at 6 % sucrose through media addition twice during the experiment. Various methods were employed in attempts to increase secondary metabolism. Antioxidant and total phenolics assays were employed to characterize phytochemical activity. A first experiment exposed four clones to phenylalanine and/or methyl jasmonate (MeJa) from week 12 to 17 in …

Go to article

Racial Motivations For French Collaboration During The Second World War: Uncovering The Memory Through Film And Memoirs, Daniela Greene May 2008

Racial Motivations For French Collaboration During The Second World War: Uncovering The Memory Through Film And Memoirs, Daniela Greene

All Theses

Abstract
After France was defeated by the Germans in June 1940, several politicians of the Third Republic formed a new government under Marshal Philippe PŽtain in Vichy. The men in the new regime immediately began to make social and political changes which, in their mind, were long overdue. They believed that they could negotiate with the occupation officials in the North and maintain France's sovereignty, at least in the 'free' Southern zone. They also believed, as did a large part of the French people, that the inadequacies of the republican system had lost France the war. It had certainly been …

Go to article

Channeled Polymer Fibers As Stationary/Support Phases For Chemical Separation By Liquid Chromatography And For Waste Stream Clean-Up, Kenneth R. Marcus May 2008

Channeled Polymer Fibers As Stationary/Support Phases For Chemical Separation By Liquid Chromatography And For Waste Stream Clean-Up, Kenneth R. Marcus

Clemson Patents

Polymer fibers having a novel cross-sectional geometry are used as stationary phase materials for liquid chromatography separations. Fibers of 20 to 50 micrometer diameters have surface-channel structures extending their entire lengths. Bundles of fibers having this novel cross-sectional geometry are packed in columns. Different polymer compositions permit the "chemical tuning" of the separation process. Channeled fibers composed of polystyrene and polypropylene have been used to separate mixtures of polyaromatic hydrocarbons (PAHs), Pb-containing compounds and fatty acids. Use of channeled fibers allows a wide range of liquid flow rates with very low backing pressures. Applications in HPLC, cap-LC, prep-scale separations, analytical …

Go to article

Clemson Commencement Program, May 2008, Clemson University May 2008

Clemson Commencement Program, May 2008, Clemson University

Clemson Commencement Programs

No abstract provided.

Go to article

Multiple Comparisons On Near Neutral Calibration Process Among Different Printing Processes, Li-Wen Chen May 2008

Multiple Comparisons On Near Neutral Calibration Process Among Different Printing Processes, Li-Wen Chen

All Dissertations

The Near Neutral Calibration Process was conducted on three different printing processes. They ware the flexo direct-print corrugated press (Bobst 160), the flexo narrow-web press (Comco Captain), and the commercial sheetfed offset lithographic press (Heidelberg Speedmaster CD102). The E-flute Kemiart Lite liner corrugated board was used for the Bobst, the gloss label substrate was used for the Comco, and the gloss text paper was used for the Heidelberg. The ISO 2846-5 ink sets were both donated from Color Resolutions Internationals for two flexo printing processes. An ISO 2846-1 ink set from Toyo was used for sheetfed offset lithographic process. The …

Go to article

Three Essays On Environmental Economics And International Trade, Patrick Mclaughlin May 2008

Three Essays On Environmental Economics And International Trade, Patrick Mclaughlin

All Dissertations

ABSTRACT This dissertation addresses the broad topic of appropriate metrics, proxies, and estimation methods in environmental economics and international trade research, presented as three separate studies. The first, entitled, 'Something in the Water? Testing for Groundwater Quality Information in the Housing Market,' examines how informed real estate markets are with respect to groundwater quality by using a couple of different proxies for groundwater quality in a hedonic framework. This research topic has potentially suffered from imperfect proxies and incomplete information, which I test. In the second, entitled, 'Do Economic Integration Agreements Actually Work? Issues in Understanding the Causes and Consequences …

Go to article

First Prev Next Last