2013 Abstracts

Lee Leavitt, University of Utah Biology Chronic methamphetamine (METH) abuse leads to structural and functional damage in the brain, which likely contributes to cognitive and behavioral dysfunction. Recent data suggest an association between METH abuse and impaired inhibitory control over behavior; that is an impaired ability to inhibit inappropriate actions or thoughts. However, the extent to which METH-induced neurotoxicity is responsible for such impairment remains to be determined. Previously, we reported that rats with METH-induced partial dopamine (DA) and serotonin (5-HT) loss in striatum and prefrontal cortex (PFC) exhibited impaired response inhibition in the form of perseverative responding. Furthermore, levels of serotonin transporter (SERT) binding in PFC correlated with perseverative responding. Herein, we have examined another dimension of response inhibition impulsive action, which is an inability to withhold a “pre-potent” response in rats with METH-induced neurotoxicity. Rats were trained to perform a stop-signal task (SST). Once rats achieved stable responding (>80% correct response) on both “Go” and “Stop” trials, they were treated with saline (0.9%), a neurotoxic regimen of METH (4 x 10 mg/kg, 2-hr intervals, s.c.) under normal ambient temperature conditions (“neurotoxic” METH group) or the METH regimen under cooling conditions (“normothermic” METH group). One week after the treatment, rats were again tested on the SST. After behavioral tests were done, animals were sacrificed and brains removed for determination of monoamine loss. The results showed: 1) the “neurotoxic” METH-, but not the “normothermic” METH or saline-treated rats, showed a 40-60% loss of SERT and dopamine transporter (DAT) binding in PFC and striatum; 2) the “neurotoxic” METH group showed normal behavioral performance in “Go” trials of the SST relative to the “normothermic” METH group or saline controls; 3) the “neurotoxic” METH group exhibited impaired withholding of a “pre-potent” response, as reflected by increased numbers of errors on the “Stop” trials of the SST. Overall, these data suggest that impaired inhibitory control over behavior (i.e., increased impulsive action) can arise as a consequence of METH-induced neurotoxicity to central dopamine and serotonin systems. Supported by NIH grant DA 024036

Tyler Shimko, University of Utah Biology Differences in the genomes of organisms control an organism’s ability to deal with and adapt to environmental stresses. In this project, two strain isolates of the nematode Caenorhabditis elegans were analyzed using high-throughput assays measuring growth and offspring production to determine the genes that confer a greater resistance to the herbicide paraquat. Paraquat acts by interfering with electron transport mechanisms within the cells of living organisms. This mechanism not only allows it to act as an effective herbicide, but also causes it to pose a considerable risk to the health of animals, including livestock and humans. Using statistical genetics, regions of the genome were identified that are likely responsible for differences in growth rate and fecundity observed in the two strain isolates when grown in paraquat. Near-isogenic lines and extra-chromosomal arrays were then created to isolate these portions of the genome in a control genetic background. This approach allowed us to be able to attribute any differences in the two traits to the genes contained within the intervals. After analyzing the body size data, representing the growth of the animals over 72 hours, we were able to draw a preliminary conclusion that an interval on chromosome V may have a small but significant effect on growth determination. As a result of this project, a specific interval was identified that may be responsible for a greater growth rate, three near-isogenic lines were created, and 34 extra-chromosomal arrays were generated. This work will be used in the future to identify the gene(s) responsible for the greater growth rate and fecundity observed in some animals exposed to the herbicide paraquat. These results will allow us to draw conclusions about the roles that these genes, and others like them, play in an organism’s ability to cope with environmental stresses.

Heidi Montgomery, University of Utah Biology Parasites are arguably the most diverse group of organisms on the planet. One key factor in determining patterns of parasite biodiversity is the number of host species a parasite can infect, or its host specificity. However, surprisingly very little is known about the evolution of host specificity. Here I use domesticated pigeons (Columba livia) and their ectoparasitic feather lice (Columbicola columbae) to demonstrate how parasite body size influences host use. The current study has two main goals: 1) to use different sized hosts to experimentally evolve louse body size, and 2) to determine how parasite body size effects host specificity. Four breeds of domesticated pigeons were infested with parasitic feather lice. After roughly six generations, mean louse body size changed with respect to host body size, with the largest pigeons having the largest lice. Interestingly, the smallest pigeons had larger lice as well. However, this increase in louse size appears to be the result of a change in microhabitat use, with lice shifting from predominantly the wings and tail to the head. This study is one of the first to experimentally demonstrate how changes in parasite morphology and behavior influence the evolution of host specificity.

Natalie Batty, Westminster College Biology Hydrocarbon metabolizing microbes play a critical role in bioremediation and bio-augmentation projects. In 1978, Brock et al. identified microbes in the Great Salt Lake (GSL) capable of metabolizing hydrocarbons, but since then these microbes have gone unstudied. This research has isolated and identified bacterial species capable of hydrocarbon metabolism from GSL. Though capable of survival in the high salt concentration of the Great Salt North Arm, we have demonstrated that these species are also capable of thriving in low salt concentrations. This research will continue with the characterization process to identify what hydrocarbon sources each species is capable of degrading.

Merima Beganovic, Westminster College Molecular Biology Nuclear Pore Complexes (NPC) create aqueous channels embedded in the nuclear envelope and are made from a network of proteins called nucleoporins (nups). The nucleoporin Nup153 has previously been found to be required for proper assembly of the nuclear lamina. In this study, a fragment of Nup153 was overexpressed in order to impede Nup153 function in T-Rex HeLa cells. After inducing the expression of the dominant negative fragment, I examined the localization of lamins A, B1 and B2, as well as SUN1, Emerin, and BiP, three proteins that mark cell membrane compartments. Lamins B1, B2, SUN1, and Emerin were found to mislocalize to the cytoplasm of the cells, and colocalization among the proteins was observed. Lamin A also had an abnormal phenotype unlike that seen with the B lamins, but indicative of a problem with integration of Lamin A into the nuclear lamina. Colocalization of the various lamin isoforms with membrane proteins such as SUN1 and Emerin indicates a problem with membrane assembly. The distinct localization of BiP, however, suggests that there is a “nuclear-like” membrane in the cytoplasm that either does not incorporate normally into the nuclear envelope as it forms or is newly-recruited to mislocalize the lamin proteins.

Heather Reynolds, Westminster College Biology The presence of mercury in a food chain can have harmful effects, including altering behavior, on organisms. Mercury is typically found in aquatic ecosystems, however recently is also recognized as a potential problem in terrestrial ecosystems. High levels of mercury have been found in the Great Salt Lake in a form able to bioaccumulate up the food chain. If the aquatic ecosystem is linked to the terrestrial ecosystem, then some of the highest predators included in this food chain may be songbirds that eat spiders. We quantified mercury in the blood of the Loggerhead Shrike, Lanius ludoviciaus, on Antelope Island. Upon being caught, the birds were measured, color banded, and a blood and feather sample taken from each of the 15 shrikes to be tested for mercury. Mercury concentrations ranged from 0.96 to 4.00 ppm, with a mean 1.14+/0.31 ppm. Sub-lethal effects in songbirds from another study were seen with concentrations ranging from 2.0-3.5 ppm. Two shrikes we tested exceeded that range. There was high variability in concentrations of mercury, which might be related to distance from shore. These preliminary data demonstrate that some mercury from the aquatic ecosystem is bioaccumulating in the terrestrial ecosystem on Antelope Island, and there may be harmful levels in the birds which could lead to change in behavior, and eventually decline in population. Future studies will investigate the costs of mercury contamination.

Graham Doherty, Westminster College Biology The Great Salt Lake is home to Artemia Franciscana, a species otherwise known as brine shrimp. These halophiles are able to live in extreme environments that have higher than average salt concentrations. Brine shrimp live their entire life cycles in the Great Salt Lake and can be found in both the north and south arm of the lake. Currently, the genetic information regarding the brine shrimp populations at different locations in the lake is underdeveloped. The Artemia populations live in different microenvironments throughout the lake with different physical characteristics and barriers between one another. The physical environment also affects the salt concentration in each microenvironment. Other studies have shown that the increased salinity of an environment accelerates the rate of change in the mitochondrial genome. We feel that different salinity levels in each microenvironment will create different amounts of genetic variation. Our goal is to determine if the distribution of genetic variation is different at different sites in the Great Salt Lake Artemia population.

Dakota Hawkins, Westminster College Arts and Sciences Abstract. Previous studies have documented effects of urbanization on the behavior, reproduction and survival of wildlife. Specifically, noise pollution in urban areas has been known to mask communication among several avian species. In a previous study in Mexico City, House Finches increased the frequency (pitch) of their songs to help mitigate the effects of low frequency urban noise. To document the average minimum frequency of House Finch song in Utah, we recorded House Finches singing from May 2012 to August 2012. Three sample sites with 1 km radii were established in Salt Lake City, Utah while a fourth site was sampled in Logan, Utah. Ambient sound was recorded at locations where songs were recorded to measure urban noise. Average minimum song frequencies and ambient noise were calculated for three sites. Frequency measurements were not significantly different among the three urban populations. Future studies will compare the minimum frequency of these urban populations to nonurban populations and investigate syllable structure and use.

Jeff Collins, Westminster College Biology The Great Salt Lake (GSL) has some of the highest mercury concentrations ever measured in surface waters. The accumulation of high levels of mercury, particularly its more toxic and readily biomagnified form, methylmercury, has been recorded in many species that inhabit or feed directly in the GSL, including waterfowl. However, no studies at the GSL, and very few studies elsewhere, have investigated the transfer of mercury from aquatic ecosystems to terrestrial ecosystems. We hypothesized that brine flies are able to accumulate mercury during their larval stages in the lake, then transfer this mercury to adjacent terrestrial ecosystems when they become flying adults. Concentrations of total mercury (HgT) and methylmercury (MeHg) were measured in samples of surface water and brine flies (larvae, pupae, and adults) collected once each month between February and July at Antelope Island, in the GSL. Samples were collected from two distinct sites: one along Gilbert Bay on the west side of the Island, and the other along Farmington Bay on the east. On average, HgT concentrations are greater in water samples from Farmington Bay (19.3 ± 9.0 ng/L unfiltered; 13.5 ± 10.1 ng/L filtered) compared to Gilbert Bay (8.5 ± 7.5 ng/L unfiltered; 9.2 ± 9.6 ng/L filtered). MeHg and HgT levels in brine flies displayed the opposite trend, with higher levels at Gilbert Bay (567 ± 123 ppb HgT; 425 ± 12 ppb MeHg) than at Farmington Bay (270 ± 60 ppb HgT; 208 ± 35 ppb MeHg). Potential explanations for the trends observed will be discussed.

Charles Ankenman, Brigham Young University Spanish and Portuguese The Middle Ages and the cultural, political and social coming of age of the European continent produced a corpus of literature and a literary tradition representative of its religious and cultural values that, amazingly, still continues to influence society today. Commonly employed terms such as “a knight in shining armor”, “prince charming”, and parallels occasionally drawn between children and both literary as well historical princes and princesses of yore are evidence of the longevity of the influence of Medieval culture, it’s ideals and the literary genre that most perfectly reflected it: the novel of chivalry. Today, few academics study the genre, it is seldom analyzed in universities, and almost never read outside of academia. In fine, their legacy and their memory has largely been preserved in the endearing pages of Cervantes’ masterpiece, Don Quixote. In this work, the protagonist, don Quixote, goes mad as he credulously devours his extensive private collection of chivalric literature believing all he reads to be not only true but also worthy of imitation. Nevertheless, despite Don Quixote’s wide reading public, few have ever read a novel of chivalry and, as a result, the exact definition of the novel of chivalry can be both obscure and even beyond the grasp of the modern reader who is uninitiated in the field of Medieval and Renaissance chivalric literature. Nevertheless, through a careful analysis of don Quixote’s private collection of novels of chivalry, the mega-genre that they constitute and the sub-genres that comprise it; the chivalric genre can be clearly defined. Additionally, through the comparative analysis of the English term novel of chivalry as opposed to the Spanish term libros de caballerias (book of great deeds done on horseback) the importance of language’s influence on the perception of the world will be demonstrated and Jacques Lacan’s theory regarding language and perception substantiated. Finally, this analysis will elucidate the novel of chivalry’s status both as a continuation of the great classical epic tradition as well as another link in the universal tradition of epic poetry and storytelling. This presentation will be of interest both to Medievalist as well as specialists in the Renaissance, Don Quixote, Spain and Portugal. Power Point Presentation. 20 – 30 minutes.

Kendra Williamson, Brigham Young University Linguistics and English Language Questions regarding language policy have persisted in Intensive English Programs nationwide. BYU’s English Language Center has revoked an English-only policy in favor of an English-mainly policy. In this environment, a two-month study has been initiated in which four experimental-group classes are provided tools for self-regulated learning to encourage English use during the lunch break. Students record goals and perceived actuals daily, reflect and respond to their individual progress, and receive weekly printed progress charts. As students use tools designed for self-regulated learning, it is expected that their daily efforts to speak English and their speaking proficiency test scores will improve.

Kev Nemelka, Brigham Young University Art History and Curatorial Studies Hungarian art has yet to break across the Atlantic with much influence on the art world, but perhaps the oeuvre of Béla Kondor (1931-1972), considered by many Hungarian art historians to be the starting point of Hungarian contemporary art, may have a shot at drawing the nation’s art out of obscurity and into the light of American contemporary “faux-naïve,” an art tradition with a growing momentum that could provide fertile terrain for Kondor’s comparable aesthetic. The faux-naïve tradition springs from “naïve art,” an art tradition whose name itself has been somewhat controversial in the past decade but has nevertheless influenced artists all over the globe. Particularly in Utah Valley, a number of artists and art professors—e.g. Andrew Ballstaedt, Fidalis Buehler, and Brian Krishisnik—are developing their own faux-naïve versions of contemporary folk art similar to that of Kondor with no knowledge of his existence, and although some contend that the sincerity of faux-naïve is factitious and premeditated, the secular and religious works of Kondor and these American artists show the positive side of contrivance, that faux-naïve can provoke feelings of nostalgia and insight into real emotions, focusing our attention on adolescent memories or spiritual innocence alluded to in the works rather than on the lack of complexity, precision, or realism often sought after by aficionados of conventional, believable art. I personally interviewed numerous Kondor experts and curators of Hungarian museums, recovered archived articles on the artist held in Hungarian collections, and conducted comparative analyses of Kondor and the aforementioned Utah artists, whom I also interviewed regarding the subject of faux-naïveté.

Matthew A. Kearney, Brigham Young University Germanic and Slavic Amid the chaos and anticipative excitement of fin-de-siecle Europe, German society quickly became a historical hotspot of unique political and social transformations. It was felt to be a period of degeneration, but at the same time a period of hope for a new beginning. In the midst of a culture that was still perpetuating lively, discriminating social appetites, it is intriguing to note that a broad examination of texts written by German women at this time, which experiment with the very question of social walls and new decisions, shows that these women most often employed conclusions laden with themes of madness, chaos, loneliness and suicide. For this research I have chosen three significant texts which can be viewed from historical and anthropological standpoints on the subject of traditional walls and choices. These are Jenseits der Mauer by Elisabeth Heinroth, Meine Freundin by Hermione von Preuschen-Telmann, and Helene Monbart-Kessler’s Kameraden. The approach to these works, and for the purpose of my research, evaluates the female literary characters in these texts in light of Friedrich Nietzsche’s philosophical view on the fragile balance between the Apollonian and Dionysian drives inherent in art and in life itself. Nietzsche asserted that in life there rages a constant battle between these two major forces, each striving to control the existence of men and women alike. Against the background of this aesthetic discourse, the three texts I have chosen acquire a new dimension: they become an avenue for examining the causes of balance, or lack thereof, in the lives of these female characters. I believe this evaluation is significant because it foregrounds some of the choices and limitations which many women faced as traditional society was changing its attitudes towards them during the late nineteenth and early twentieth centuries.

Belinda Ramirez, Brigham Young University Anthropology The Hmong are a stateless hill tribe ethnic group originating in southern China. Due to persecution and discrimination from the Chinese, many Hmong migrated to the surrounding regions of the Southeast Asian massif in the eighteenth century. The mountainous homes of the Hmong now lay within the borders of countries such as Thailand, Laos, and Vietnam. Religiously, Hmong are traditionally a shamanistic people, believing in spirits and worshipping their ancestors through diverse practices, such as animal sacrifice and spirit calling. In addition to traditional Hmong belief (dab qhuas), many messianic religious groups have recently surfaced within the Hmong diaspora, often accompanied by a prophetic leader, criticisms of traditional Hmong practices, and a hopeful vision of the future in which there exists a Hmong country. My research on this subject is based on an ethnographic field study in Nan Province, Thailand among the Is Npis Mis Nus, a Hmong messianic religious group. Using traditional anthropological field methods, I acquired data on the practices and beliefs of the Is Npis Mis Nus, as well as investigated their conceptions of nationalism, ethnicity, and identity. In this paper, I posit that the rituals and beliefs of the Is Npis Mis Nus reveal the group’s desire for Hmong political, cultural, and economic legitimacy and national sovereignty. These beliefs and rituals also serve as boundaries that provide a clear distinction between messianic and non-messianic Hmong. Additionally, I explain how the characteristics of the Is Npis Mis Nus religion help the Hmong deal with the social and ethnic disruptions that globalization has presented.

David Ridge, Brigham Young University Religion This paper examines 2 Samuel 11 in light of a broadened understanding of the betrothal type-scene first identified by Robert Alter. The definition of type-scene in this context is broadened by comparative study with another feature of traditional narrative, the “theme” identified by Albert Lord as a significant characteristic of oral narratives. Examining the theme and type- scene together allows for a better definition of type-scene which leads to the identification of previously overlooked type-scenes. It is argued that 2 Samuel 11 contains all the elements and key- words necessary to be a type-scene of the betrothal journey narrative type; creating a literary relationship between this passage and the betrothal narratives of the patriarchs including those of Isaac in Gen 24, Jacob in Gen 29 and Moses in Exodus 2. Utilizing this approach allows for a clearer understanding of the textual depiction of David and his actions in the Hebrew Bible, a new understanding of the intertextual relationship between 2 Samuel 11 and narratives in Genesis and Exodus, and a broader and more valuable understanding of narrative structures within the Hebrew Bible.

Abbie Black, Brigham Young University History Wet-nursing, a common practice in early modern England, was looked upon as a respectable source of income for women until the latter half of the eighteenth century. Scholars and doctors criticized the practice in both moral and medical terms, which influences how scholars analyze the occupation today. Constant attacks on the occupation continued until the practice was associated with lower class, sinful women; the practice all but disappeared by the early twentieth century because of the negative rhetoric and the advances in safe synthetic feeding practices. Historical scholarship reflects the negative rhetoric that was prevalent for the past two centuries; they forget to mention that wet-nurses continued to be essential to Early Modern English culture and Victorian families. Both the employer family and wet-nurse relied on this labor; families with an at risk child needed the labor of the wet-nurse, and the wet-nurse needed the income for her own support. Recent trends in scholarship focus on the practice from the top down as an institution rather than an occupation for individuals. I intend to fill this gap in scholarship by focusing on the wet-nurse as an individual functioning independently from the increasingly negative rhetoric during the mid-nineteenth century.

Susie McGann, Brigham Young University Humanities As the American economy changes, jobs are becoming increasingly more focused on teamwork, collaboration, and analytical and social skills in addition to technical skills. My initial hypothesis is that such knowledge and skills can be located in the category of a capacity for leadership–leadership of a sort that is of value even among entry-level professionals. These skills can be acquired through study in the Humanities. With my research, I hope to prompt change in the existing culture among students majoring in these fields so that they will begin conversations about careers earlier and more frequently among fellow students and faculty. In order to reach these goals, I collaborated with other humanities students to compile a group of individual essays that explain to undergraduates in Humanities majors how their study is preparing them to be leaders. I reviewed and edited these papers, and researched and wrote a supplicant formal essay to address current or prospective students in Humanities disciplines. The collection of papers are accessible to Humanities students through the College of Humanities as a resource written by students in their fields that explains the value of a Humanities education for life after college. I also organized and hosted an event for undergraduate Humanities students to begin a college-wide conversation about their Humanities degrees in terms of leadership.

Joshua Klein, Brigham Young University History In the last half of the 20th Century, the history of the enigmatic British intelligence community has been increasingly exposed as multiple archives have allowed access to original documents. This project involves a study of the Joint Intelligence Community, an agency created a few years before the outbreak of World War 2. The committee had the task of combining reports from the various agencies within the British Intelligence community into one cohesive report for the Chiefs of Staff and the Prime Minister. As part of a research project at Cambridge University, I acquired the primary sources (the JIC reports throughout the war) in a trip to the Kew Archive of the British National Archives in London. Because the reports represent the various agencies’ combined reports, they consequently offer a remarkable insight into the thinking of British policy makers on a week by week basis; thus, they reveal British policy makers’ information, opinions, and perceptions within the context of the war. These extraordinary sources profoundly limit historical anachronism. My discoveries reveal a plethora of inconsistencies between our contemporary understanding of British perceptions during the war and actual British perceptions during the war. Following is a brief list of these preliminary discoveries, which I hope to present at UCUR. I will discuss how these insights helps shape our contemporary understanding of British perceptions during the war. Surprising hesitancy to believe that Germany would attack Russia Over-estimation of Britain’s role in the war and a under-estimation of Russia’s role Relatively late recognition of Germany’s doomed fate on the Eastern Front Failure to recognize German potential to continue fighting as the war nears the end Severe British anxiety regarding German attempts for a peace agreement Explicit failure to identify the Nazis’ ideological motivations throughout the entire war Anti-Soviet tendencies throughout the war

Matt Cox, Brigham Young University History The role of the Magistrate or civil leader was a topic of debate in the time of John Locke and a focus of many of his political writings. Focusing on four of his main political pieces, his Essay on Toleration, a Letter Concerning Toleration, Two Treatises on Government, and Paraphrase and Notes on the Epistles of St. Paul, I examine how he developed his ideas on the role of the magistrate and the changes that take place. I show how Locke transitions from his youthful acceptance of the absolute rule of kings to his final views where he shows how even Paul leaves room open in his epistles for disobedience to rulers. Essential in this transition is Locke’s limitation on the powers of the magistrate. In his early writings Locke allows for the use of force in protecting the overall good of the society. Locke redefines this vague role of the magistrate by limiting the power of the magistrate to acting only in the protection of the rights, liberties and property of their citizens.

Madison Mercer, Brigham Young University Anthropology Between 1964 and 1969, Spotten Cave near Goshen, Utah was excavated by Brigham Young University (BYU) archaeologists. In 1971, James M. Mock published the only official report dedicated to this site as his Master’s Thesis. This cave contained valuable artifacts that can allude to the diet and medicinal plants of the Fremont Indians and other Utah prehistoric groups. Such plant knowledge is scarce throughout the Eastern Great Basin, even among those cultural groups where much is known. Through a comparison study called ethnohistory between those living now, such as modern Gosiute, Ute, and Shoshone, with what plants have been found in human coprolites (fecal remains) from Spotten Cave, it is possible to recon- struct what plants prehistoric people may have used for food or medicine. This will provide greater insight into who lived before in the Eastern Great Basin and is helpful knowledge for those wishing to study how the Utah environment was utilized in the past.

Laura Hatch, Brigham Young University Humanities, Classics, Comparative Literature Art historians and artists have long treated linear perspective solely as an artistic technique. As defined by the Italian Renaissance, linear perspective is a tool to recreate reality on a canvas. But linear perspective carries philosophical implications, as well. Albrecht Dürer, a German Renaissance artist, seems to have understood perspective’s limitations in truth-making. In reading this image with a knowledge of Heideggerian phenom- enology, I propose that while on the surface this woodcut may seem to be nothing more than an illustration of proper technique, Dürer is actually exposing linear perspective’s failure to capture and truly represent an image as reality.

Megan Barber, Brigham Young University History This project investigates the British view on the Civil War in the United States. Specifically, it explores the correspondence between Richard Lyons, the British envoy to the United States, and Lord Russell, the British Secretary of State for Foreign Affairs. It charts the changing perception of Lyons’ view of the Civil War as it progressed during the first crucial year of the conflict. The Confederacy actively sought British recognition and in fact sent two representatives to the United Kingdom who were subsequently seized by a Union ship. Lyons’ role in what came to be known as the Trent Affair is known, but has overshadowed his other perceptions of the conflict. This project draws on the original PRO manuscript correspondence held in the UK National Archives in London.

Jennifer Mitchell, Brigham Young University History The science fiction television show, Star Trek, deals heavily with political issues ranging from the complexities of war to changing gender roles in American culture. My paper will discuss how the show accomplishes this successfully, particularly through the representation of historical events. The Holocaust is one example of a reoccurring theme throughout the show, an issue that is addressed appropriately when many representations of the Holocaust are so heavily criticized. This paper will examine the themes and structures of different episodes through out Star Trek: The Original Series. One episode to clearly address the anti-Semitic attitudes of the Nazi Regime, “Patterns of Force,” aired on February 16, 1968, a relatively short time after the Regime had fallen. Many of the adult viewers at this time had experienced the Holocaust in their lifetimes, directly or indirectly. An episode entitled “Space Seed” deals with eugenics and the idea of creating a super race. The episode attempts to demonstrate how those in the 23rd century may react to such practices. In “Consciousness of the King” Captain Kirk reveals that he had personally witnessed and been victim to genocide. Not only does genocide clearly connect to the Holocaust, William Shatner (the actor who portrays the Captain) is in fact Jewish. His costar Leonard Nimoy (Spock) also comes from Jewish heritage. Having two Jewish actors in leading roles adds yet another level of complexity when portraying such sensitive material. The paper will take this into account as well as other complications of representing the Holocaust in popular culture.

Charles Wilson, Brigham Young University Anthropology The purpose of this project has been to recreate a poorly understood Fremont (A.D. 300-A.D. 1300) ware known as corrugated pottery. Little is known about corrugation other than it seems to have made its appearance late in the Fremont world around A.D. 1100. Exactly how Fremont potters made corrugated pottery is a sparsely visited subject in publications. Attempting to recreate corrugated pottery, an exercise in experimental archaeology, has already suggested that corrugation was not only decorative, but played a role in the construction of corrugated vessels. Obscure practices of bygone Fremont potters will come to light as experiments progress.

Danielle Leavitt, Brigham Young University English/Russian While the former Soviet Union touted economy and a single social class, the socioeconomic differences that have emerged within Ukrainian families in the twenty years since the fall of the Soviet Union are widely unexplored. Our research comes in the form of creative nonfiction essays, which examine and contrast the everyday experience of Ukrainian families–specifically Ukrainian women–within three disparate socioeconomic classes. Based on a summer-long field study in Kiev, Ukraine living with three families in contrasting socioeconomic circumstances, our essays observe and explain facets of Ukrainian culture that are commonly misunderstood, yet deeply spiritual and culturally significant to Ukrainians. Our project explores the day to day workings of three Ukrainian families in suburban low class, urban middle class, and upper-oligarchical class, searching for stories describing quotidian life within their varying circumstances. There will be particular emphasis on the experiences of women. The project is presented in creative non- fiction essays stemming from observations, historical research, and the experience of the Ukrainians with whom I interacted. Ukraine (specifically its capital, Kiev) has a rich cultural and political history and a flowering modern culture heavily influenced by deep-rooted traditions, superstitions, and beliefs. Little creative nonfiction writing contributes to the exploration of both sophisticated and unsophisticated Ukraine. Our goal is to do just that; to delve into the human, commonplace intricacies of varied Ukrainian life through observation and writing.

Nathan Gill, Brigham Young University Geography The Africanized honeybee first entered southern Utah within the last five years. This invasive species reduces pollination and honey production and is therefore costly to the farming industry and local apiaries. Additionally, Africanized honeybees are extremely aggressive and pose a threat to the health and well-being of Utah’s residents. The aim of my study is determine if Africanized honeybee habitat in Utah can be accurately modeled through remote sensing and Geographic Information Systems analysis. Locations of known Africanized honeybee presence and absence, acquired from the Utah Department of Agriculture and Food’s ground reference data, were used to identify the characteristics of suitable habitat. Criteria that we considered include minimum temperature, precipitation, distance to water, elevation, slope, aspect, and Normalized Difference Vegetation Index, among others. I have identified the conditions for suitable habitat and I am in the process of designing a model to identify Africanized honeybee habitat across Utah. After the model has been refined, it will be tested against additional locations of presence and absence acquired from the Utah Department of Agriculture and Food. The modeled habitat will help the Utah Department of Agriculture and Food and other organizations to focus efforts to educate the public about the dangers of Africanized honeybees in specific locations that are at high risk.

Adam Olson, Brigham Young University Plant and Wildlife Sciences Forests systems of the Central Rocky Mountains rely on an intricate balance of natural disturbance cycles in order to develop properly. Forest fires are one such disturbance, however, certain fire characteristics, particularly fire severity, can vary widely across forest landscapes. In our study, we examined the influence of fire severity on aspen regeneration as well as aspen defense against wildlife and livestock browsing. Our results indicate that high or moderate burn severity is more favorable to aspen regeneration and survival. These areas of severe burn result in a higher density of aspen suckers, more vertical and lateral growth, greater chemical defense concentrations, and less browse damage than the neighboring plots of low or no burn. This data suggests that fire severity should be taken into account when considering plant regeneration and susceptibility to browse damage in burned landscapes.

Matthew Whited, Brigham Young University Biochemistry Several lines of evidence suggest that protein lysine acetylation pathways are deregulated in cancer (1). Moreover, deacetylase inhibitors are emerging as important anti-tumor therapeutics, suggesting that the forced reprogramming of protein-lysine acetylation is toxic to tumor cells. In this study we show that Sirt1, an NAD+-dependent Sirtuin deacetylase that promotes cancer cell survival, is aberrantly mislocalized to the cytoplasm of breast tumor cells. Moreover, the depletion of cytosolic Sirt1 by siRNA sensitizes breast tumor cells to paclitaxel-induced death. Previously, we developed a biotin-switch proteomics approach to identify cytosolic Sirt1 substrates (2). This approach yielded a variety of substrates with roles in metabolism, survival, and oxidative stress signaling. Our current work focuses on three of the proteins identified as Sirt1 substrates: SOD1, DJ-1, and 14-3-3z. SOD1 and DJ-1 both suppress oxidative stress-induced death, and high levels of 14-3-3z expression suppress chemotherapy-induced apoptosis and correlate with negative patient outcomes in breast cancer. Our preliminary results suggest that acetylation of DJ-1 and SOD1 suppress their anti-oxidant functions, while acetylation of 14-3-3z disrupts its binding to pro-survival proteins. Taken together, our data support a model in which cytosolic Sirt1 activates multiple pathways that work together to promote tumor cell survival.

Hyrum Shumway, Brigham Young University Microbiology and Molecular Biology Epigenetics is the study of factors of gene regulation that do not stem from the primary DNA sequence. One such example of epigenetic gene regulation is where DNA wraps around histone proteins to form nucleosomes. The positioning of nucleosomes is the first order of control for genic transcription. Wrapped DNA is less accessible for transcription compared to DNA that is nucleosome free. Model organisms for human epigenetics such as the nematode Caenorhabditis elegans are invaluable because of their ease in manipulation and because the components of nucleosomes (histone proteins and DNA) are highly conserved across phylogeny. The purpose of my particular research is to develop and validate a new protocol for tissue-specific isolation of nucleosomes through immunoprecipitation in young adult C. elegans. This protocol leverages green fluorescent protein fused to histones to research nucleosome positioning in the germ-line cells of C. elegans nematodes. When successful in our animal model, this procedure is the first step in allowing analysis of chromatin architecture of any tissue at any developmental or disease state including human cells. The widespread prevalence and implications of human disease is staggering in magnitude. Research is ongoing to decrease morbidity, increase prevention, and fight infection. With epigenetic tools, this vital research is benefitted and supplemented.

Michael McEntire, Brigham Young University Biology Female mate choice (intersexual selection) and male dominance interactions (intrasexual selection) can each play important roles in sexual selection. These two mechanisms tend to be discussed in isolation. The goal of this study is to explore the interaction between these two forms of sexual selection. To test this idea, we focused on the livebearing tropical fish system Poecilia gillii. We grouped males into similarly sized pairs and observed them for a week to determine which male was dominant. These pairs were then presented to females in mate choice trials to ascertain female preference. We also photo- graphed the males to determine coloration. We found that females were unable to detect dominant males without viewing the physical contest and that carotenoid coloration bore no effect on female preference. Females tended to choose the male to their left, suggesting the preferential use of their right eyes in making decisions on mate choice.

Ji Su Park, Brigham Young University Nutrition, Dietetics, and Food Science Selenium (Se) and soy have each been shown to reduce risk for prostate cancer when consumed at high levels. The purpose of this project was to define the molecular mechanisms of prostate cancer chemoprevention by Se and soy, and to describe how timing of dietary treatment modifies those effects. [C57BL/6 X FVB] F1 TRAMP (TRansgenic Adenocarcinoma of Mouse Prostate) male mice were fed stock diets high or low in soy, with or without a supplement of Se (4.0 mg Se/kg BW as Se-meth- ylselenocysteine) by gavage 5 d/wk in a 2 X 2 factorial design. Mice were exposed to different diets starting from conception, 6 weeks, or 12 weeks of age and were sacrificed at 18 weeks. Three-way ANOVA showed that supplemental Se increased serum and liver Se, with significant interactions with both time and soy intake. Selenium dosing decreased BW independent of soy intake and time of dietary intervention. Both Se and soy decreased epididymal fat pad weights, with Se’s effects being more pronounced in mice exposed to diets from conception than from 6 wk. Urogenital tract weights, a measure of prostate proliferation and tumor volume, were significantly reduced by Se supplementation (P<0.001) and soy (p=0.044), independent of time of dietary intervention. Histological examination of mouse prostates is in progress to determine dietary effects on disease progression. These data suggest that, in this model, chemopreventive efficacy of Se and soy does not differ between prenatal and early post-natal introduction.

Marcus Vranes, Brigham Young University Molecular Biology Recent studies have attempted to discover the correlation that exists between DNA methylation and nucleosome positioning, but none have explored the direct effect of DNA methylation on nucleosome formation and positioning. This proposed research will directly test the effects DNA methylation has on nucleosome positioning and whether the histone octamer has preferred sequences to which it binds, which will in turn add our understanding of gene expression and regulation. A better understanding of these concepts will help to aid efforts in gene therapy to better the quality of life of many who suffer from various genetic conditions.

Adrian Scottorn, Salt Lake Community College Natural Sciences Chocolate has long been the favorite snack of many, and recent studies have shown multiple positive health benefits of eating dark chocolate in particular, encouraging production and consumption of very high cacao content bars. We have quantified some of the changes that occur to the amount of known flavor compounds contained in a locally made artisan chocolate. The bars we chose were 70% minimum single origin cacao made with as few other ingredients as possible. By first measuring the amount of known flavor compounds, then stressing the bars in various ways, we looked in to what really happens when a quality chocolate bar is mistreated.

Michael Peterson, Brigham Young University Biology A person’s predisposition to Alzheimer’s Disease is known to be influenced by both genetic factors as well as environmental factors. One know environmental factor is that known to affect risk for disease is early parental death. The purpose of this research is to better understand the complex factors that influence the disease by analyzing the relationship between the environmental factor of early parental death with genetic variants known to influence the disease. We used extant data from the CCSMHA, an ongoing aging study including 89.7% (5092 of 5677) of all of the eligible residents of Cache County, Utah. This data includes information about environmental and psychosocial stressor of the subjects as well as information about physical examinations, metal screenings, and individuals’ genotypes at many loci that are known to be related to Alzheimers Disease. We used multivariate logistic regression to determine the effect of early parental death by SNP interactions on risk for AD. For the analysis we cleaned the data by removing SNPs less than a minor allele frequency of 0.01, a Hardy-Weinberg equilibrium value of 110-6, and a maximum missing snp call of 0.2. Individuals were also removed if genotyping rate was less than 0.2. After filtering we had 262 cases, 239 controls and 0 missing Final Results will be presented at the Conference.

Rachel Perry, Brigham Young University Life Sciences Previous studies have indicated that Visinin-like protein (VILIP) may be a powerful tool in predicting disease progression and guiding prognosis of Alzheimer’s disease (AD). Cerebral spinal fluid (CSF) was collected from hundreds of individuals with varying levels of AD. The CSF was then analyzed for levels of VILIP protein using Luminex technology. SNPs were genotyped using the Illumina OmniExpress chip. SNPs found to have a Hardy-Weinberg frequency less than 1×10-4 were not included, assuming that this variance was due to a genotyping error. SNPs and samples missing more than five percent of the data were also not included. Following the cleanup of the data, an association test using linear regression was performed. Covariates used in the analysis included age, gender, and covariates that accounted for population stratification (PC1 and PC2). Over one hundred SNPs were found with a p-value less than 1×10-5. The genomic inflation factor for the generated data was 1. One marker showed significance at the genome-wide level. We have identified a genetic marker that shows significant association with CSF VILIP levels. This finding may provide insight into genetic control of VILIP levels, which may be a useful in understanding the pathological processes involved in AD.

Chris Thurman, Salt Lake Community College Natural Sciences This project is an ongoing multifaceted investigation of the Jordan River. The study’s intent is to monitor and asses the overall condition of the river from Utah Lake to the Great Salt Lake. Samples of river and pond water, typical vegetation such as cattails, and some soils have been collected with reference to sites along the river that may serve as sites for the introduction of waste and other contaminants. These samples have so far been examined with respect to temperature and dissolved oxygen at the sampling point. Two river samples, one pond sample, and plant sample have been analyzed by ICP-MS for 20 different metals. The levels of Lead, Cadmium, and Copper have been determined by anodic stripping voltammetry at the ppb level in a variety of other water samples from the river. The results of these measurements are disused and presented Geospatially.

Matthew Schneider, Brigham Young University Physiology and Developmental Biology Alzheimer’s disease, the most common form of dementia, affects millions of people per year. Research has shown that Alzheimer’s affects the hippocampus brain region, which is involved in learning and memory. Understanding learning and memory functions is imperative to comprehending both healthy brain functions and Alzheimer’s disease. Many researchers seek to understand both the causes and treatments of the disease, but tangible information remains elusive. Studies thus far have shown that to encode memories, the brain must change neural synapses to either strengthen or weaken those pathways, a process known as synaptic plasticity. Using electrophysiology techniques on mouse hippocampal slices, this project will provide further insight on memory formation and regulation by imitating synaptic plasticity mechanisms. I will look at a specific cellular pathway involving the protein receptor GPR55, which has recently been shown to induce synaptic plasticity. By understanding how the GPR55 pathway functions, this research will contribute to the understanding and treatments of Alzheimer’s and other neurodegenerative diseases.

Lacie Cates, Salt Lake Community College Natural Sciences According to the Salt Lake Valley Health Department 1 the optimal level of fluoride is 0 .7 to 1.2 ppm in drinking water. Also acidity of many foods and drinks leads to tooth decay. In 2003 the State of Utah started adding fluoride to tap water. Then in 2008 Utah counties voted on addition of fluoride resulting in a variation of water treatment from county to county. At present the state has about 50% of the population receiving fluoride treated water with the aim of providing the 1 ppm fluoride level. It has also been reported that some counties are considering cutting back to about 0.7 ppm 2 . This study examined the pH and fluoride content of water samples from the major population counties in Utah. Fluoride levels ranged from 0.08 – 0.92 ppm. The pH values for these samples ranged from 6.26 -8.08. A further study of the fluoride levels and pH in bottled water and other drinks and foods such as fruit and cheese was conducted because many people in Utah do not drink tap water, particularly in regions of high water hardness or areas where taste and / or odor can be off putting. The pH values ranged from 2 to 8. The most acidic being colas and citrus based drinks and foods. The fluoride values varied from 0.03 to 0.47 ppm.

Kristian Johnson, Dixie State University Biology Antimicrobial methods, such antibiotics and Ultraviolet (UV) irradiation, have been a means of suppressing prokaryote proliferation for nearly a century. Over the last several years, scientists have found that numerous strains of prokaryotes have developed resistance to antibiotics. Concurrently, the process of bacterial irradiation using UV-C is common practice in a variety of sterilization applications. As revealed in the seminal work by Chang et al. inactivation curves for Microorganisms such as Staphylococcus aureus (Staph) were established in 1985. Their values indicate survival rates based on Intensity, which is defined as the time of UV irradiance per unit area. Similar to the evolutionary evidence of antibiotic resistance, we are interested in the selective pressure UV-C has on Staph. By recapitulating Chang’s experiment nearly 30 years later, our preliminary results indicate an increased resistance to UV-C in Staph. In this experiment, we determine a current UV-C dose-dependent kill rate function for Staph.

Chancen Hall and Nichkolas Hadley, Dixie State University Biological Sciences Batrachochytrium dendrobatidis (chytrid fungus) is prevalent worldwide, and the resulting chytridiomycosis has contributed to at least 168 amphibian species extinctions. In 2010, B. dendrobatidis was discovered in the greater Zion National Park area of southwestern Utah. Because few populations have shown resistance to chytridiomycosis, we decided to explore the effects of this disease on populations of Hyla arenicolor (canyon tree frog). We tracked the spread of B. dendrobatidis by testing skin samples taken annually from several different canyons and monitored population sizes. During the three years of our study, infected populations did not show subsequent population declines. This suggests that H. arenicolor population size in this region is unaffected by B. dendrobatidis. In the future, testing hypothesized explanations for surviving infection could help us identify populations not at risk and thus allocate conservation resources more efficiently.

Rachel Schneider, Brigham Young University Neuroscience The ability to create distinct memories for very similar stimuli and events is called pattern separation. Pattern separation is thought to be dependent on neurogenesis (the birth of new neurons) in the dentate gyrus, a subregion of the hippocampus. Neurogenesis is reduced in depression, as is overall memory performance. It has been proposed that depression negatively impacts pattern separation abilities, however a link between depression and performance in pattern separation memory tasks has yet to be identified. Accordingly, we designed a study to investigate the relationship between pattern separation performance and level of depression. Eighty-two participants completed a pattern separation memory test and a set of questionnaires to gauge their level of depression. During the task, participants were presented with 600 images one at a time on a computer screen in a continuous recognition paradigm. Participants were asked to determine whether each image was new, old, or similar. Images seen for the first time during the task qualified as “new”, images that were repeated following a variable delay qualified as “old”, and images that were similar to previously presented stimuli, but not exactly the same, qualified as “similar”. A pattern separation score was calculated based on the proportion of correctly identified similar stimuli. We found a negative correlation between depression scores and pattern separation scores (r(82) = – 0.301, p < 0.01). This relationship held constant even when we controlled for other factors known to affect neurogenesis, such as exercise and anxiety levels. These results provide support for the theory that depression is negatively related to pattern separation performance, possibly due to a decrease in neurogenesis in the hippocampus.

Ryan Williamson, Brigham Young University Physiology and Developmental Biology The hippocampus is thought to mediate learning and memory by altering the strength of synapses within its circuitry. In many cases, this synaptic plasticity can be induced by intracellular signaling molecules. Lipid-based intracellular signaling molecules called endocannabinoids have been shown to modulate or mediate synaptic plasticity among hippocampal pyramidal cells and stratum radiatum interneurons; however, the role of endocannabinoids in mediating synaptic plasticity among interneurons in the stratum oriens is still unclear. Our goal was to determine whether stratum oriens interneurons have the machinery necessary for endocannabinoid production and, if so, whether this machinery is expressed in a sub-type specific manner. To do this, we used patch clamp electrodes to extract single cells from rat hippocampal slices and analyzed the expression of endocannabinoid biosynthetic enzyme mRNA using quantitative real-time PCR. In this analysis, we examined cellular expression of two interneuron markers, GAD65 and GAD67, as well as several calcium-binding proteins and neuropeptides to determine interneuron subtype. We also analyzed cellular expression of several endocannabinoid biosynthetic enzymes, including N-acyl phosphatidylethanolamine phospholipase D, diacylglycerol lipase alpha, and 12-lipoxygenase, as well as type I metabotropic glutamate receptors. Preliminary data suggests that stratum oriens interneurons express mRNA necessary for endocannabinoid biosynthetic enzymes. Additionally, we identified interneurons that coexpress mRNA for somatostatin and diacylglycerol lipase, suggesting that O-LM cells or another somatostatin-positive interneuron subtype may possess the enzymes necessary to produce the endocannabinoid 2-arachidonoylglycerol. Further work will allow us to examine how endocannabinoid biosynthetic enzyme expression correlates with other interneuron subtypes in the stratum oriens.

Aaron Sharp, Brigham Young University Biology The Cache County study on memory, health, and aging has played a significant role in several studies. However, there is some potential skepticism in the scientific community about its sample. The population in Cache County is derived from a diverse group of founders, but it is perceived by some to be an isolated population. If so, conclusions discovered there might not apply to other populations. Our objective is to compare the Cache County data to a panel of genetic data—provided by the International HapMap Project and the Alzheimer’s Disease Neuroimaging initiative—that is known to be representative of typical European-American populations. Doing so will indicate whether the genetic diversity in the Cache County sample is characteristic of an isolate or not. Analysis will be done using the open source “Plink” analysis toolset, including the –cluster and –mds-plot computational algorithms. Using –cluster groups individuals according to identity by state distances. The –mds-plot algorithm creates a scatter-plot of the individuals in 2-dimensional space, identifying any systematic difference between the Cache County data and the general population. We expect that the Cache County data will be representative of general European-American populations, because of its diverse group of founders.

Rachel Nettles, Brigham Young University Plant and Wildlife Sciences Background/Questions/Methods

Caitlin Munger, Brigham Young University Biology Alzheimer’s is a fatal, non-treatable neurodegenerative disease and the most common cause of dementia. While no one gene has been found to determine the development of Alzheimer’s, past studies have established a strong hereditary influence on Alzheimer’s. So far, only 5 genes have been found which replicably contribute to the genetic risk of developing Alzheimer’s. However, the gene for Chlolesteryl Ester Transfer Protein (CETP) has been identified as a possible new contributor to the genetic risk factor. In order to test this association we obtained data on over 4000 subjects studied in the Cache County Study on Memory, Health and Aging over a 15-year period. This data included DNA samples, cognitive decline rates and incidence of dementia–particularly Alzheimer’s Disease. DNA samples were SNP genotyped using quantitative PCR. The SNP genotypes and corresponding phenotypes for each subject were then analyzed for association usingmixed linear models and for survival, or the amount of time until the disease appeared, using Cox proportional hazard models. We found a correlation between the V405I SNP and a decreased rate of cognitive decline. We found that for each additional G the rate of decline decreased by 0.6 points per year on the MMSE test. The identification of CETP as a player in the genetic risk for Alzheimer’s and dementia will provide much needed information on the genetic factors involved in dementia and allow for possible future therapeutic targets.

Joseph Moulton, Brigham Young University Physiology and Developmental Biology With the advent of recent mutations in the influenza A viral genome, drugs that previously blocked the proton flux responsible for disassembly of the viral envelope and exposure of viral RNA to the transcriptional machinery of the host cell have become ineffective. Our study of the M2 hydrogen ion channel responsible for this flux has led to a vastly-increased under- standing of the mechanisms behind the conductance activity and potential blockage of these transmembrane tetramers. By embedding M2 proton channel subunits of the S31N mutant strain into liposomal bilayers and suspending these bilayers in the buffers and ionic gradients characteristic of the intracellular environment, we have been able to simulate and observe nor- mal functioning of the influenza A virus. Using these liposomal bilayers, we have developed a series of experimental protocols to test a variety of amantadine- and rimantadine-related drugs for successful blockage of M2 S31N proton conductance. Our research presentation will be centered around the mechanisms of this channel and the favorable results that we have obtained from many of these drugs.

Whitney Hoopes, Brigham Young University Microbiology and Molecular Biology HspB2 is one of eleven known small Heat Shock Proteins (sHSP) that is expressed in human heart and skeletal muscle. In response to cellular stress, heat shock proteins play a vital role to help misfolded proteins and proteins susceptible to denaturation maintain their structure. Two members of the sHSP family, CryAB and HspB2, are both required for normal heart function and cardiac muscle integrity. CryAB-deficient mice have defects in cardiac muscle structure whereas HspB2-deficient mice display energy deficits (Rajasekaran et al. 2007). The contrasting phenotypes of CryAB and HspB2 suggest differential roles for these molecular chaperones in the heart. HspB2 has been found to localize with the mitochondria in several different cell lines and overexpression of this sHSP has been shown to support survival of cells against heat stress (Nakagawa, 2001). To understand the role and mechanism of HspB2 in cardiac muscle energy regulation, we have used a yeast two-hybrid (Y2H) system to uncover the novel protein binding partners specific to HspB2. From screening a human heart cDNA library, HspB2 interacted with approximately 10,000 out of 20 million plasmids. We have sequenced more than 1000 of these putative interactors and have identified over 100 unique proteins. Over 40% of these protein partners are involved in mitochondrial energy production and another 25% in cardiac muscle structure maintenance. In addition, we have identified an interaction between HspB2 and the related sHSP CryAB. We then compared this data with mitochondrial HspB2 binding partners identified by mass spectroscopy (MS) through a large-scale bioinformatics analysis and constructed a protein-protein network. Y2H dependency tests were conducted to verify interactions identified by both Y2H and MS. Following yeast verification, a subset of the interactions were confirmed in C9H2 cardiac cells through coimmunopurification. Our research describes the first protein-protein interaction network for any sHSP, supports a role for HspB2 in mitochondrial energy production and suggests a link between mitochondrial energy production/redox stasis and stressed cardiac muscle maintenance.

Christian Boekweg, Brigham Young University Plant and Wildlife Sciences It has been shown that the population densities of deer and elk in the Rocky Mountains are at an unprecedented high. The heavy browsing of said species (ungulates) on regenerating aspen suckers can be devastating, leading to homogenously aged aspen stands that now have reduced resilience to drought, fire or logging disturbance, and an increased susceptibility to pathogens. Lastly, the extensive, highly selective herbivory of the aspen suckers may cause a shift in forest composition away from the aspen tree to an increase in other, less palatable species. We selected 186 sites across the 3 national forests of Central and Southern Utah, and characterized stand composition using the point quarter method. Stands were defined by successional stages from early to late; aspen, mixed or conifer. We then used pellet counts to estimate animal density and evaluated the effect of animal density and stand type on the regeneration success of aspen suckers. The key result of our study is that high ungulate density is highly correlated with reduced sucker heights (p<0.001). This indicates that high ungulate density impedes aspen regeneration by preventing aspen from recruiting into the overstory. Our study suggests that closer monitoring of the long term effects of herbivory on aspen development and regeneration is necessary to ensure vigorous aspen forests.

Jesse Cobell, Brigham Young University Biology Alzheimer’s disease (AD) is the sixth major cause of death in the U.S. However, at present, no diagnostically useful serum markers for AD have been identified. Hence, we used a novel serum proteomic approach to interrogate the low molecular weight proteome for serum biomarkers. This allowed for survey of around 5000 low MW species. To reduce ion suppression, an acetonitrile precipitation step was used to remove high abundance serum proteins. Protein-depleted sera from 58 cases and 55 controls were analyzed by cLC-ESI-QTOFMS/MS using reverse phase chromatography. Data were reviewed using Applied Biosystem’s Analyst-QS software to compile spectra. Differentially expressed peptides (cases vs. controls) were analyzed statistically using the Student’s t-test. This led to discovery of 36 candidate biomarkers. Additionally, we compared AD subjects with more severe disease (Clinical Dementia Rating (CDR) =3) with non-demented individuals (CDR=0) and found 23 biomarkers. Furthermore, on comparison of mild and moderate stage AD individuals (CDR = 0.5, 1, 2) with those with severe disease (CDR = 3), we found 24 biomarkers. Some of these biomarkers appeared more prominent in one gender. We then fragmented several of these biomarkers on an LTQ-Orbitrap XL hybrid mass spectrometer and cLC-ESI-QTOF-MS/ MS system using collision-induced dissociation to determine amino acid sequence analysis. We have identified 5 biomarkers and are in the process of identifying the remaining biomarker species. This serum proteomics approach found statistically different peptide abundances in subjects with AD. Additional biostatistical evaluations are underway to determine sensitivity and specificity of individual biomarkers and their combinations. Future studies will assess biomarkers according to disease stage and validate current biomarkers in blinded comparisons of other AD sera. This serum proteomics approach appears promising in locating and identifying clinically useful serum biomarkers of AD.

David Marriott, Brigham Young University Physiology and Developmental Biology Acute stress has been shown to decrease Long-Term Potentiation (LTP) in the CA1 region of the mouse hippocampus. Additionally, stressed animals show signs of anxiety and suffer decreases in spatial memory tasks such as object recognition and maze navigation. Conversely, exercise has been shown to increase spatial memory task performance in mice, attenuate anxiety-like behaviors and enhance neurogenesis and LTP in the dentate gyrus. While the effects of stress and exercise have been examined independently, there is currently a lack of experimental evidence that connects how stress and exercise, when experienced by the same animal, might modulate LTP in the CA1 region of the hippocampus. In our ongoing study, mice have been separated into a control group, a stress group (restraint and tail-shock), and an exercise + stress group where mice have voluntary access to a running wheel (for 30 days) before undergoing the stress protocol. We hypothesize that exercised animals will experience a protective effect against the reductions in CA1 LTP. In the stress only group, preliminary data shows a modest stress effect on LTP, yet we are learning that factors such as controllability of the stressor or the ability to develop coping mechanisms might potentially attenuate