Digital Commons Network^™

Colorimetric Detection Of Norfloxacin And Ceftazidime By Modified Materials, Lalitphan Hongtanee

Chulalongkorn University Theses and Dissertations (Chula ETD)

Novel approaches were developed for the colorimetric detection of norfloxacin and ceftazidime using chemically modified polymer resin and cotton sponge as sensing materials, respectively. For norfloxacin detection, the optimum condition was achieved by using a resin modified with 6.0 µM Congo red at pH 6 to extract norfloxacin in 10 mL of sample at pH 2. The reaction was completed within 15 minutes. Regarding ceftazidime detection, a cotton sponge functionalized with polyethyleneimine (PEI) was fabricated and characterized by FTIR, SEM, and ninhydrin test. To fabricate the PEI-sponge, 170 mM 3-aminopropyl triethoxysilane (APTES) was used to modify 1.0 g cotton fibers …

Emulsification Microextraction Using Surfactant Coupled With Colorimetric Detection For Determination Of Synthetic Dyes In Food, Niluh Indria Wardani

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this thesis, solidification of floating organic drop-emulsification liquid-liquid microextraction (SFOD-ELLME) was combined with digital image colorimetry (DIC) for the analysis of synthetic dyes, such as rhodamine B (RhB) and crystal violet (CV) in food and drink samples. Here, the extraction was performed by using emulsified fatty acid surfactant and freezing procedure to separate the extracting phase. The solidified floating organic drop was then taken out, liquified and dropped on the paper platform for digital image colorimetric analysis. The response surface methodology-central composite design (RSM-CCD) was used to optimize some variables that influence the extraction efficiency. A sample of 7 …

Prediction Of Soil Sorption Coefficient Of Chemicals By Molecular Modeling Technique, Wasin Pithaktrakool

Chulalongkorn University Theses and Dissertations (Chula ETD)

Soil pollution is one of the pollutions caused by nature and human activities, which are mostly the use of insecticide and chemical fertilizer to make plants grow well and produce more products. However, these chemicals are absorbed by soil. In this research work, properties of chemical compound affecting soil sorption were analyzed, and model that can predict soil sorption coefficient of chemicals (KOC) was examined by using quantitative structure property relationship (QSPR) technique. Totally 1,327 compounds were selected, and their three-dimensional structures were constructed. Semi-empirical PM7 method was used for geometry optimization calculations. A total of 1,536 physicochemical properties were …

Neuroprotective Effect Of Intranasal Delivery Of Asiatic Acid Against Amyloid Beta1-42-Induced Alzheimer's Disease In Mice, Ridho Islamie

Chulalongkorn University Theses and Dissertations (Chula ETD)

Asiatic acid (AA) is an active natural compound that can be derived from Centella asiatica extract. Several pharmacological studies were reported that AA has potential as neuroprotector in the central nervous system disorders. AA penetration in the brain was limited due to its low bioavailability. Nasal delivery system of solid lipid nanoparticles (SLNs) loaded-AA was developed to increase AA penetration in the brain. The current study aimed to investigate neuroprotective effect and protective mechanisms of AA in SLNs by nasal-to-brain delivery technique against Aβ1–42 induced memory impairment by in vivo study. Male ICR mice were divided into six groups (n=11-12/group); …

Effects Of Lipopolysaccharide On Mandibular And Tibial Bone Regenerationin A Murine Model Of Sle Induced By Fcγriib Deficiency, Sirikanda Jantaboon

Chulalongkorn University Theses and Dissertations (Chula ETD)

Although systemic lupus erythematosus (SLE) is known as the autoimmune disease that triggers inflammation and bone impairment, the mechanisms leading to the decrease in bone regeneration remain inadequately characterized. Patients with SLE have been observed high prevalence in bone loss due to host immune responses that may induce host antimicrobial activities. Here, this study used systemic and local lipopolysaccharide (LPS) administration for mimicking infectious condition in FcγRIIB−/− mice as a lupus murine model. The results showed FcγRIIB lacking FcγRIIB−/− in mice with local and systemic LPS led to decreased cancellous bone volume in their drilled hole region of tibial and …

The Novel Cyanoacrylate Based Fluoride Varnish, Narongrit Larpbunphol

Chulalongkorn University Theses and Dissertations (Chula ETD)

The important factors contributing to the effectiveness of fluoride varnish are the amount of fluoride ion release and the retention time of the varnish on the tooth surface. Commercial fluoride varnishes are susceptible to mechanical removal; therefore, patients are informed to avoid eating for a few hours and refrain from tooth brushing for 12–24 h, which results in patient inconvenience. However, the novel cyanoacrylate based fluoride varnish would not have these disadvantages. This study compared the daily fluoride ion release, abrasion resistance to brushing, and toxicity to human gingival fibroblasts (hGFs) between a newly-developed cyanoacrylate based fluoride varnish and Duraphat …

Human Health Risk Assessment Of Heavy Metals In Roadside Dust Near Hydropower Dams Construction Areas In Wangduephodrang District Of Bhutan, Kinley Dorjee

Chulalongkorn University Theses and Dissertations (Chula ETD)

The concern over the heavy metal laden dust and its impact on human health has gained global importance over the decade. Exposure to roadside dust is associated with various acute and chronic health issues. Bhutan too is battling environmental health issues due to increasing anthropogenic and developmental activities such as hydropower dam construction. This study analyses the heavy metals concentrations in roadside dust near hydropower dam construction areas and assesses the noncancer and cancer risk of exposure to heavy metals laden dust through inhalation. This study was a cross sectional study. The roadside dust samples near hydropower dam construction in …

Mohegan Women, The Mohegan Church, And The Lasting Of The Mohegan Nation, Bethany R. Berger, Chloe Scherpa

Roger Williams University Law Review

No abstract provided.

An Uncomfortable Truth: Law As A Weapon Of Oppression Of The Indigenous Peoples Of Southern New England, James D. Diamond

Roger Williams University Law Review

No abstract provided.

The New Independents: A Historical Analysis Of Webcomics And Webtoon, Leonal A. Sepúlveda S.

Dissertations and Theses @ UNI

Webcomics have now existed as a form of graphic literature for slightly over thirty years, evolving along with computer technology and in turn reflecting the changes in culture, style and preferences for both independent artists on the Internet and their audiences. The evolution of the webcomic illustrates how the changing trends in technology and profit interests shape stylistic and narrative sensibilities. In turn, the offshoot medium of webtoons, whose history parallels the webcomic directly, illustrates the way the presentday independent webcomic sphere is shaped by the demands of contents platforms that demand its creatives constantly produce content to maintain active …

Efficient Removal Of Lead Ions From Aqueous Media Using Sustainable Sources On Marine Algae, Hannah Namkoong, Erik Biehler, Gon Namkoong, Tarek M. Abdel-Fattah

Electrical & Computer Engineering Faculty Publications

The goal of this project is to explore a new method to efficiently remove Pb(II) ions from water by processing Undaria pinnatifida into immobilized beads using sodium alginate and calcium chloride. The resulting biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). Using immobilized U. pinnatifida, we investigated the effect of various factors on Pb(II) ion removal efficiency such as temperature, pH, ionic strength, time, and underlying biosorption mechanisms. For Pb(II) ion biosorption studies, Pb(II) ion biosorption data were obtained and analyzed using Langmuir and Freundlich adsorption models. It …

Grand Challenges In Low Temperature Plasmas, Xinpei Lu, Peter J. Bruggeman, Stephan Reuter, George Naidis, Annemie Bogaerts, Mounir Laroussi, Michael Keidar, Eric Robert, Jean-Michel Pouvesle, Dawei Liu, Kostya (Ken) Ostrikov

Electrical & Computer Engineering Faculty Publications

Low temperature plasmas (LTPs) enable to create a highly reactive environment at near ambient temperatures due to the energetic electrons with typical kinetic energies in the range of 1 to 10 eV (1 eV = 11600K), which are being used in applications ranging from plasma etching of electronic chips and additive manufacturing to plasma-assisted combustion. LTPs are at the core of many advanced technologies. Without LTPs, many of the conveniences of modern society would simply not exist. New applications of LTPs are continuously being proposed. Researchers are facing many grand challenges before these new applications can be translated to practice. …

Agents At Work: Modeling How Space Can Influence People In The Workplace, Jovan Poposki

Theses and Dissertations (Comprehensive)

People interact with space in ways that are important to consider when designing an office. Not considering this relationship has led to the dissatisfaction of employees post-occupancy. In this thesis, I present an agent-based model that incorporates several characteristics of agents, such as work ethic and sociability, and explores their behaviours and social interactions in the workplace. The model is first tested on a commercial workspace, varying agent parameters to see how they change the behaviour of the model. I find that agents with extreme personalities are happiest, and show a bimodality in the distribution of time spent in various …

Parental Incarceration And Stigma: A Qualitative Content Analysis Of Children's Books, Samantha Nguyen

Theses and Dissertations (Comprehensive)

Children of parental incarceration are often forgotten victims and have been noted to experience collateral consequences such as stigma, poor mental health, and isolation. Since children are often forgotten, there is a lack of information regarding their experiences, what resources are available to them, and whether or not these resources intended to be beneficial. One of the resources that are available to children, caregivers, and other adults are children’s books regarding parental incarceration. To determine whether or not these children's books act as a guide, this study examined the content and illustrations of 19 children’s books on parental incarceration. The …

Using Online Training Modules To Enhance Parents' Early Literacy Training Skills And Understanding, Ayodele Sanni

Theses and Dissertations (Comprehensive)

Parental involvement is considered a crucial factor in developing children’s early literacy and reading skills, especially for children not yet in school. The present study aims to determine whether an online literacy module can increase early literacy knowledge in parents who may not have the training to promote their child’s learning. Additionally, the study examines parent perspectives of online video training and the practicality of the video’s content. To test the hypothesis that parent knowledge will increase after exposure to the online video, 29 Canadian parents (27 mothers, two fathers) with children aged 3 to 5 were provided with supervised …

The Untended Garden: How Adoptees Navigate Relationships With First Family Members, Dawn Michele Mccormick Tracz

Theses and Dissertations (Comprehensive)

This research explores how people who were adopted over the age of 6 years old in open adoption arrangements navigate ongoing relationships with first family members. It explores perceptions of how a connection with both adoptive and first family members impacts self-concept. Using an interpretivist-constructivist lens, the narratives of four women are presented and analyzed. In addition to qualitative interviews, each participant was invited to create images that represented relationships with significant family members. The narratives are re-presented in detail adhering closely to the teller’s organization and emphases. In the analysis, themes related to relationships with first family members and …

Femme Ex Machina: Sex Robots, Embodiment, And Posthuman Subjectivity, Julia A. Empey

Theses and Dissertations (Comprehensive)

Andrea Dworkin warned in her 1974 book Woman Hating that men would soon develop the technology to “create the sex objects that will gratify them” (199). This dissertation investigates one of those technologies: sex robots, as mediated through science fiction film and literature. While the sex robot is still an emerging technology, its embodiment, particularly when female-rendered, has been imagined and negotiated for centuries. Men creating women in a specific, desired image is not new, but the sex robot is currently being transformed from imagined representation to embodied subject. This dissertation traces a pattern of representation that has allowed us …

Fifth-Dimensional Warfare And National Security In Canada: Situating Microdeviation Theory Within C-59: An Act Respecting National Security Matters, Hayden Slight

Theses and Dissertations (Comprehensive)

In an era of rapid technological change, the growing threat environment in the cyber dimension will continue to influence how a sovereign nation contends with attacks that can occur from any corner of the world. The growing adaptation and expansion of technology belonging to the Internet of Things (IoT) and the increasing prevalence of social media (Facebook, Twitter) has also influenced the spreading of attack surfaces that can become victim to exploitation by motivated parties including foreign states and terrorist groups. Against this backdrop, Canada’s own efforts to modernize and reinforce its own national security agencies resulted in the developing …

Relationships Between Executive Functioning, Memory, And Source Judgements On Children’S Responses To Online Advertising, Samantha Barbosa

Theses and Dissertations (Comprehensive)

Children’s understanding of online content is a topic of interest, yet little is known about how children distinguish distracting and often misleading information (e.g., advertisements) from relevant information. Our aim is to measure the relationship between executive functioning, memory and source monitoring in a population that has heavy internet usage and are also the most at risk for mistakenly recalling false or irrelevant information. Children aged 7-12 years old (N = 30), with no known developmental or cognitive disorders, were recruited for the study. In an online session, the children viewed two novel online media sources (i.e., a website …

Community Stress And Resilience During Covid-19: Assessing The Emotional Profile Of The City Of Hamilton Using A Social Media Analysis, Senyo Agbeyaka

Theses and Dissertations (Comprehensive)

This study investigated stress and resilience at the neighbourhood level in Hamilton Ontario in pre- and peri-pandemic conditions using a social media analysis. Sentiment analysis of geo-located Twitter posts produced within Hamilton census tract boundaries was conducted using Stresscapes and EMOTIVE, validated software that extract and code emotional information from human language expressions about stress and hope (a proxy for stress), respectively. Baseline levels of both emotions were measured using aggregate scores at the census tract level in Hamilton from tweets produced during two pre-pandemic periods (March 2019 to July 2019; and August 2019 to February 2020), with a replication …

Exploring Effects Of Message Framing On Supportive Behaviors Toward Environmental Corporate Social Responsibility, Young Kim, Myoung-Gi Chon

College of Communication Faculty Research and Publications

Purpose

The purpose of this study was to shed light on how effective environmental corporate social responsibility (CSR) communication can be achieved through persuasive communication strategies using message framing.

Design/methodology/approach

This study conducted an online experimental study with a 2 (narrative: narrative or non-narrative) × 2 (framing: gain or loss) between-subjects design.

Findings

The findings showed that environmental CSR communication using narrative framing messages is most effective in creating strong CSR associations between a company and the environmental CSR domain and sharing the company's CSR information on supportive communication and advocating for the environmental campaign.

Originality/value

This study highlights the …

Using Internet Reciprocal Teaching To Develop Second Graders' Online Text Evaluation Skills, Annika Buell

Dissertations and Theses @ UNI

This study was designed to explore the relationship between Internet Reciprocal Teaching (IRT) and young students’ online text evaluation skills. It built upon previous research that identified four main online reading comprehension skills: locating, evaluating, synthesizing, and communicating information that are similar yet more complex than offline reading comprehension skills. In the majority of previous research, participants were in fifth grade or above. This study aimed to observe the processes younger students go through while reading online text. Participants were second grade students in a Midwestern suburban elementary school.

Qualitative methods were used to collect data while students participated in …

The Impacts Of Adolescents' Leisure Activity Types On Psychological Well-Being, Academic Self-Efficacy, Self Esteem, And Stress, Dongyub Back

Dissertations and Theses @ UNI

Korean teenager deviance, school violence, and school dropout caused by academic stress are serious social issues within the country. High levels of student stress are likely to bring about depression and suicide resulting in a significant effect on their psychological well-being and life satisfaction. It is of particular concern for middle school students experiencing rapid physical and psychological developmental changes without proper support. Forty-five percent of Korean students’ indicated stress in their life and 27% experienced depression (Statistics Korea, 2019). Also, Korean middle school students (27.3%) have suicide impulse (Youm & Kim, 2019). These youth development issues are considered social …

Studying Vulnerable Populations Through An Epigenetics Lens: Proceed With Caution, Katie Saulnier, Alison Berner, Stamatina Liosi, Brian Earp, Courtney D. Berrios, Stephanie O.M. Dyke, Charles Dupras, Yann Joly

Manuscripts, Articles, Book Chapters and Other Papers

Epigenetics – the study of mechanisms that influence and modify gene expression – is providing unique insights into how an individual’s social and physical environment impact the body at a molecular level, particularly in populations that experience stigmatization and trauma. Researchers are employing epigenetic studies to illuminate how epigenetic modifications lead to imbalances in health outcomes for vulnerable populations. However, the investigation of factors that render a population epigenetically vulnerable present particular ethical and methodological challenges. Here we are concerned with demonstrating how, in targeting certain populations for epigenetic research, this research may be pathologizing socio-cultural and medical practices in …

Definition And Detection Of Hypervulnerabilities Using A Framework For Assessing Port Resilience, Katherine Smith, Rafael Diaz, Yuzhong Shen, Francesco Longo

VMASC Publications

Long term plans for maritime ports are identifying investments that will increase their capacity while decreasing their environmental footprint and operating costs. These changes are leading to increases in complexity at a time when leaner practices are driving investments to become more strategic. As such, this work proposes a generalized definition that allows a system or entity to be classified as exceedingly vulnerable by comparing it to other entities. This definition is developed from a set of definitions gathered from disparate fields. From this definition grounded in theory, the initial rules for complex system implementation are developed and demonstrated on …

Midwestern Communities’ Reaction To The 1940s And 1950s Polio Epidemics, Lauren Mcdonald

Departmental Honors Projects

The 1940s and 50s’ polio epidemics resulted in the illness, death, and paralysis of thousands of children throughout the United States. Unlike other illnesses spread by poor sanitation which usually affected the lower classes, polio cases were far more prevalent among the middle class. Middle class neighborhoods’ conditions did not allow for natural immunity in early childhood. Prior research explored the urban and suburban middle class families in highly infected states like New York. However, the experiences of Midwesterners were largely ignored. In crowded city neighborhoods, polio could spread rapidly in a short period of time and then die down …

"Not What They Have Chapter And Verse For:" On Judgments, Assumptions, And Expectations In Austen And Eliot, Piper Dutton

Departmental Honors Projects

The nineteenth century left lasting impacts on our contemporary world, from political and economic developments to social and philosophical ones, and this extends to literature in the development of the novel as a major form. Jane Austen and George Eliot played integral roles in this maturation of the novel, as well as what Elizabeth Sabiston calls “the emerging female text and voice,” and thus both they and their art form merit continued reading and discussion (3). Novels are tools of social norms and revolution, and in the nineteenth century functioned as tools of the author in teaching their morals, worldviews, …

The Ableist Gaze And Disability Trauma: How Onscreen Representation Erases The Truth, Emily Brown

Departmental Honors Projects

This project critically engages with disability representation in the media through an uncensored autoethnography of everyday ableism. In particular, it focuses on how the Netflix series Special reveals the duality of representation: being seen is validating yet (re)traumatizing. As a queer woman with Cerebral Palsy, I’ve spent my whole life trying to find myself in TV shows and movies, latching onto the few disabled and disabled-coded characters available. I never felt fully seen until I watched Special: a show about a gay man with Cerebral Palsy gaining independence through a writing internship and romantic prospects. Special allowed me to acknowledge …

Sigirr Mutation In Human Necrotizing Enterocolitis (Nec) Disrupts Stat3-Dependent Microrna Expression In Neonatal Gut., Wei Yu, Inamul Haque, Aparna Venkatraman, Heather Menden, Sherry M. Mabry, Badal C. Roy, Sheng Xia, Jeremy W. Prokop, Shahid Umar, Aron M. Geurts, Venkatesh Sampath

Manuscripts, Articles, Book Chapters and Other Papers

Background & aims: Single immunoglobulin interleukin-1-related receptor (SIGIRR) is a major inhibitor of Toll-like receptor signaling. Our laboratory identified a novel SIGIRR stop mutation (p.Y168X) in an infant who died of severe necrotizing enterocolitis (NEC). Herein, we investigated the mechanisms by which SIGIRR mutations induce Toll-like receptor hyper-responsiveness in the neonatal gut, disrupting postnatal intestinal adaptation.

Methods: Clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 was used to generate transgenic mice encoding the SIGIRR p.Y168X mutation. Ileal lysates, mouse intestinal epithelial cell (IEC) lysates, and intestinal sections were used to assess inflammation, signal transducer and activator of transcription 3 (STAT3) phosphorylation, …

The Value Of A Meaningful Life As A Response To The Problem Of Evil, Eric J. Silverman, M. Elizabeth Lewis Hall, Crystal Park, Jason Mcmartin, Kelly Kapic, Laura Shannonhouse, Jamie Aten, Alexis Abernethy

Faith and Philosophy: Journal of the Society of Christian Philosophers

No abstract provided.