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Description
Lyme disease is a common tick-borne illness caused by the Gram-negative bacterium Borrelia burgdorferi. An outer membrane protein of Borrelia burgdorferi, P66, has been suggested as a possible target for Lyme disease treatments. However, a lack of structural information available for P66 has hindered attempts to design medications to target the protein. Therefore, this study attempted to find methods for expressing and purifying P66 in quantities that can be used for structural studies. It was found that by using the PelB signal sequence, His-tagged P66 could be directed to the outer membrane of Escherichia coli, as confirmed by an anti-His Western blot. Further attempts to optimize P66 expression in the outer membrane were made, pending verification via Western blotting. The ability to direct P66 to the outer membrane using the PelB signal sequence is a promising first step in determining the overall structure of P66, but further work is needed before P66 is ready for large-scale purification for structural studies.
ContributorsRamirez, Christopher Nicholas (Author) / Fromme, Petra (Thesis director) / Hansen, Debra (Committee member) / Department of Physics (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
Description
In the preface to his 1852 Dictionary of Domestic Medicine and Household Surgery, Spencer Thompson wrote: "But health will fail, either in old or young, and accidents will happen, in spite of the most careful precaution." With this concise statement, Thompson summarized the universal human desire to combat illness, injury, and hurt with action and knowledge. The more efficient ability to spread ideas and technology in nineteenth-century Britain led to increased production and use of home remedy books. Although women traditionally represented the agents of remedy and care within the domestic sphere (centuries prior to the nineteenth century), a struggle between the supposed inherent nurturing capabilities of womanhood and the professional medical realm occurred within the rhetoric of the home remedy genre during this period. Cultural mores allowed and pushed women to take up duties of nursing in the home, regardless of advice given by male physicians like Thomas John Graham, W.B. Kesteven, and Ralph Gooding. Despite remedy book physician-authors' attempts to dictate appropriate medical care in the home through the writing of home remedy books, British women read, interpreted, and used home remedy books in ways that undermined medical control.
ContributorsJacobson, Emily (Author) / Green, Monica (Thesis advisor) / Szuter, Christine (Thesis advisor) / Warren-Findley, Jannelle (Committee member) / Arizona State University (Publisher)
Created2011
Description
All multicellular organisms are susceptible to developing cancer, but some organisms have varying sensitivities to the disease. One such organism is the Trichoplax adhaerens which has no documented case of cancer development. T. adhaerens cancer resistance was studied by observing physiological and morphological changes of the organism after radiation treatment. Preliminary experiments suggested that this organism is able to survive exposure to 160 gray radiation treatment almost as well as untreated organisms. The T. adhaerens have two genes, TriadG6402 and TriadG5479, similar to the human genes TP53 and MDM2 respectively. TP53 and MDM2 are the two main genes associated with apoptosis in humans: an important cell regulatory checkpoint involved in cancer prevention. PCR analysis, done after radiation treatment, showed an overexpression of the ortholog gene MDM2 in the T. adhaerens. This may suggest that T. adhaerens block apoptosis from occurring and that their ortholog gene is involved in DNA repair. It is significant to study the gene expression of TriadG6402 and TriadG54791 in T. adhaerens because these genes are well conserved in humans. Future studies of these genes in the T. adhaerens can be used to understand the evolution of the function of these genes in more complex organisms and be used for human cancer prevention.
ContributorsKulkarni, Arathi (Author) / Fortunato, Angelo (Thesis director) / Maley, Carlo (Committee member) / Department of Economics (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Enzyme Replacement Therapy (ERT) is a treatment often used for patients with disorders that affect the production of various enzymes within the body, such as Cystic Fibrosis and Fabry Disease. ERT involves the use of artificially-produced enzymes, which can be derived from humans, pigs, and bacteria. Generally, enzymes derived from porcine and bacterial sources are much less expensive and more accessible than those derived from a human source. This, and the ethical implications that porcine enzymes carry, make the decision of choosing treatment simple to some and complex to others. Ethically, human-derived enzymes are often considered more ethical, while not conflicting with religious beliefs and practices as porcine-derived enzymes do.
In order to further compare porcine and human-derived enzymes, a determination of the enzyme effectiveness was done via digestion simulation. The digestion for both the human and porcine-derived enzymes consisted of three steps: oral, gastric, and intestinal. After the digestion, the absorbance for each enzyme class as well as a dilution curve of the formula used was read and recorded. Using the standard dilution curve and the absorbance values for each unknown, the formula and thus enzyme concentration that was lost through the reaction was able to be calculated.
The effectiveness of both the human and porcine enzymes, determined by the percent of formula lost, was 18.2% and 19.7%, respectively, with an error of 0.6% from the spectrophotometer, and an error of about 10% from the scale used for measuring the enzymes. This error was likely due to the small mass required of the enzymes and can be prevented in the future by performing the experiment at a larger scale.
In order to further compare porcine and human-derived enzymes, a determination of the enzyme effectiveness was done via digestion simulation. The digestion for both the human and porcine-derived enzymes consisted of three steps: oral, gastric, and intestinal. After the digestion, the absorbance for each enzyme class as well as a dilution curve of the formula used was read and recorded. Using the standard dilution curve and the absorbance values for each unknown, the formula and thus enzyme concentration that was lost through the reaction was able to be calculated.
The effectiveness of both the human and porcine enzymes, determined by the percent of formula lost, was 18.2% and 19.7%, respectively, with an error of 0.6% from the spectrophotometer, and an error of about 10% from the scale used for measuring the enzymes. This error was likely due to the small mass required of the enzymes and can be prevented in the future by performing the experiment at a larger scale.
ContributorsBlevins, Brianna R (Author) / Martin, Thomas (Thesis director) / McILwraith, Heide (Committee member) / College of Integrative Sciences and Arts (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Over the last century, the Latino population in the United States has increased dramatically. Like most ethnic groups, Latinos highly value their culture and bring aspects of it with them when they come to the United States. One such aspect of Latino culture is the use of traditional medicine. As the Latino population in the United States continues to grow, it is important that physicians and future physicians understand how the use of and belief in traditional medicine within different Latino populations can affect the healthcare experience for both provider and patient. Many physicians lack this knowledge and therefore are unsure how to proceed when confronted with these situations; in order to remedy this issue, this project seeks to propose and demonstrate a potential course that would be intended to inform pre-medical and pre-health students about traditional medicine in different Latin American countries so that they will be better prepared.
In this 3-credit course, students will gain awareness and understand the importance of Latino traditional medical practices from the perspective of future medical professionals. Students will learn about concepts such as folk illnesses and traditional religious practices within different Latino populations and will discover how these cultural beliefs can affect a patient’s attitude and cooperation in the medical office.
Through study of the traditional medicines of Puerto Rico, Mexico, and Cuba, students will be exposed to new concepts that will allow them to gain a broader understanding of their future patients, which will allow them to provide the best possible care as a physician. Students will reflect on the importance of having respect for a patient’s cultural beliefs in the medical profession, regardless of their knowledge of Spanish, so that they will be best equipped to handle these situations within the United States and abroad.
In this 3-credit course, students will gain awareness and understand the importance of Latino traditional medical practices from the perspective of future medical professionals. Students will learn about concepts such as folk illnesses and traditional religious practices within different Latino populations and will discover how these cultural beliefs can affect a patient’s attitude and cooperation in the medical office.
Through study of the traditional medicines of Puerto Rico, Mexico, and Cuba, students will be exposed to new concepts that will allow them to gain a broader understanding of their future patients, which will allow them to provide the best possible care as a physician. Students will reflect on the importance of having respect for a patient’s cultural beliefs in the medical profession, regardless of their knowledge of Spanish, so that they will be best equipped to handle these situations within the United States and abroad.
ContributorsIncha, Carmen (Author) / Estévez, Dulce (Thesis director) / Oberstein, Bruce (Committee member) / School of Molecular Sciences (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Bee communities form the keystone of many ecosystems through their pollination services. They are dynamic and often subject to significant changes due to several different factors such as climate, urban development, and other anthropogenic disturbances. As a result, the world has been experiencing a decline in bee diversity and abundance, which can have detrimental effects in the ecosystems they inhabit. One of the largest factors that impacts bees in today's world is the rapid urbanization of our planet, and it impacts the bee community in mixed ways. Not very much is understood about the bee communities that exist in urban habitats, but as urbanization is inevitably going to continue, knowledge on bee communities will need to strengthen. This study aims to determine the levels of variance in bee communities, considering multiple variables that bee communities can differ in. The following three questions are posed: do bee communities that are spatially separated differ significantly? Do bee communities that are separated by seasons differ significantly? Do bee communities that are separated temporally (by year, interannually) differ significantly? The procedure to conduct this experiment consists of netting and trapping bees at two sites at various times using the same methods. The data is then statistically analyzed for differences in abundance, richness, diversity, and species composition. After performing the various statistical analyses, it has been discovered that bee communities that are spatially separated, seasonally separated, or interannually separated do not differ significantly when it comes to abundance and richness. Spatially separated bee communities and interannually separated bee communities show a moderate level of dissimilarity in their species composition, while seasonally separated bee communities show a greater level of dissimilarity in species composition. Finally, seasonally separated bee communities demonstrate the greatest disparity of bee diversity, while interannually separated bee communities show the least disparity of bee diversity. This study was conducted over the time span of two years, and while the levels of variance of an urban area between these variables were determined, further variance studies of greater length or larger areas should be conducted to increase the currently limited knowledge of bee communities in urban areas. Additional studies on precipitation amounts and their effects on bee communities should be conducted, and studies from other regions should be taken into consideration while attempting to understand what is likely the most environmentally significant group of insects.
ContributorsPhan, James Thien (Author) / Sweat, Ken (Thesis director) / Foltz-Sweat, Jennifer (Committee member) / School of Music (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
The college textbook is the most commonly required component of almost any college course, regardless of a student's academic discipline. Professors often expect students to have access to the textbook and to use it to complete assigned readings. Textbooks often contain features that are designed to facilitate active reading, or critical engagement with the information being read, to enhance learning of the material. However, students often do not read or prioritize reading the textbook. Students who do read, tend not to read the textbook as intended or use many of the features designed to promote active reading and enhanced learning of the material. Educational studies of textbooks tend to focus on aspects related to topics more relevant to publishers or professors with less research on aspects of the textbook applicable to students at the college level. The purpose of this study is to evaluate students' textbook use and their attitudes toward the textbook in an introductory biology course. Results of this study indicate students hold positive attitudes toward their textbook in an introductory biology course and majority of students do not use components meant to facilitate active learning. Although students report completing assigned readings, students may actually be reading select portions of what is assigned in using the textbook to prepare for exams. These results suggest that students may only be using their textbook to enhance their understanding of materials they expect to be tested on. The findings of this study help to understand the role of the textbook from the perspective of the student and provide insight for improving textbook design and use in science courses at the college level.
ContributorsRudolph, Alexia Marion (Author) / Vanmali, Binaben (Thesis director) / Chen, Ying-Chih (Committee member) / Yoho, Rachel (Committee member) / Department of Psychology (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
Background:
In Navajo (Diné) populations, the two main forms of medicine that people use include traditional Diné medicine and Western medicine. Traditional medicine can be understood primarily through the concept of maintaining Hózhó or “balance”, while Western medicine is defined through the use of scientific evidence-based techniques and research. The reasons and barriers to using each form of medicine respectively are varied depending on aspects such as accessibility, familiarity, trust, or cost. Overall, there is a current lack of community viewpoints in regards to past examples of the intersection between traditional and Western medicine. This thesis examines reasons behind why Diné individuals use traditional Diné medicine and Western medicine respectively, and their viewpoints on the potential intersection.
Methods:
An anonymous online survey was distributed via snowball sampling from November 2023 to February 2024 after obtaining ASU IRB approval. It consisted of questions focused on demographics, use of traditional medicine, use of Western medicine, and opinion on the intersection between traditional and Western medicine. Statistical analysis and emerging themes were then performed and noted respectively.
Results:
There were a total of 15 responses to the online survey. A majority of participants previously used traditional medicine (80%), while all had previously used Western medicine (100%). There was a similar level of satisfaction and perceived efficiency for each, averages ranging from 3.8 to 4.0 respectively on a scale of 1 to 5. Many respondents used traditional medicine for more cultural and spiritual/mental health reasons, while many used Western medicine for more physical health reasons. Cost was the main barrier for each. Participants showed overall positive receptibility to potential intersections, but there was some hesitance in regards to scenarios where Western providers recommended traditional medicine use.
Conclusion:
Many reasons and barriers behind participant use of traditional and Western medicine were reflective of what was found in the literature review. The overall frequency of use, satisfaction, and efficiency can be further understood by a majority of participants living outside the Navajo Nation for long periods of time. The use of traditional medicine also made participants feel more connected to their culture, which can also contribute to the high levels of satisfaction/efficiency for traditional medicine. Interestingly, cost was found to be the primary barrier of each, which indicates room for growth in both respective fields to increase patient use. There was overall positive receptiveness to a possible intersection for delivery methods of medicine which indicates an overall desire to maintain Hózhó and holistic health, however the type of questions and recommendations made by respective providers needs to be done with care. This type of intersection should continue to be explored through community driven discussion and creativity in future studies.
ContributorsMazeika, Anika (Author) / Maupin, Jonathan (Thesis director) / Cordell, Zach (Committee member) / Barrett, The Honors College (Contributor) / School of Molecular Sciences (Contributor) / School of Community Resources and Development (Contributor)
Created2024-05
Description
Sulfur oxidation is a process that is seen a wide variety of places. One particular place is Yellowstone national park where an abundance of hot springs are present. These acidic and hot places are prime locations for sulfur oxidation to occur. At a very basic level this is thought of as Sulfur, oxygen, and water forming sulfate and hydrogen. Many other reactions occur when an organism performs these processes, and many enzymes are used for this. This paper aimed to create, balance, and analyze the reactions involved in the paper Sulfur Oxidation in the Acidophilic Autotrophic Acidithiobacillus spp. (Wang et al., 2019) Once these reactions were balanced thermodynamic properties were found to evaluate the Gibbs Free Energy of these reactions. This allowed for a unique energy-based view of how this web of reactions relate to each other.
ContributorsMolina, Johnathan (Author) / Shock, Everett (Thesis director) / Weeks, Katelyn (Committee member) / Barrett, The Honors College (Contributor) / School of Molecular Sciences (Contributor)
Created2021-12
Description
Early detection of disease is essential for alleviating disease burden, increasing success rate and decreasing mortality rate especially for cancer. To improve disease diagnostics, many candidate biomarkers have been suggested using molecular biology or image analysis techniques over the past decade. The receiver operating characteristics (ROC) curve is a standard technique to evaluate a diagnostic accuracy of biomarkers, but it has some limitations especially for heterogeneous diseases. As an alternative of the ROC curve analysis, we suggest a jittered dot plot (JDP) and JDP-based evaluation measures, above mean difference (AMD) and averaged above mean difference (AAMD). We demonstrate how JDP and AMD or AAMD together better evaluate biomarkers than the standard ROC curve. We analyze real and heterogeneous basal-like breast cancer data.
ContributorsBrister, Danielle (Author) / Chung, Yunro (Thesis director) / Park, Jin (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor) / School of Molecular Sciences (Contributor) / School of International Letters and Cultures (Contributor) / School of Human Evolution & Social Change (Contributor)
Created2021-12