2013 Abstracts

Brennan Young, Utah State University Geology Thermal springs in northern Utah and southeastern Idaho mostly lie near active or inactive Basin-and-Range normal faults. They are dynamic systems, and the character of some has changed drastically since work as early as the 1980’s (Blackett and Wakefield, 2002; IDWR, 2001). We examined and sampled 60 thermal springs and most samples met criteria for cation geothermometers, or mathematical-geochemical tools used to estimate the maximum temperature of hydrothermal reservoirs. Of the 60 springs, 51 met criteria for the Na-K-Ca geothermometer and the remaining nine springs did not meet the criteria for the K-Mg, Na-K, Na-K-Ca, or Na-K-Ca-Mg cation geothermometers used in this project (Fournier and Truesdell, 1973; Fournier and Potter, 1979; Giggenbach, 1988). Of those 51 springs, only one is considered to be in partial equilibrium with the thermal reservoir, and estimates a reservoir temperature of 79°C (Giggenbach, 1988). Though the majority of springs exhibit a chemical signature of having mixed with shallow groundwater (Giggenbach, 1988), the Na-K-Ca geothermometer gives the most reliable results for springs in northern Utah and southeastern Idaho, but only for springs with surface temperatures exceeding 30°C and with greater than 1000 ppm total dissolved solids (TDS). Geothermometer results for these springs yield reservoir temperature estimates between 193 and 249°C.

Daniel Gray, Utah Valley University Physics Mini black holes (BH) of various mass could be left over in space from the early expansion Big Bang phase (so called primordial BHs). As a result of interaction of those BHs with interstellar hydrogen they could form a bound system with an electron or a proton (or both). What would such system look like? Would it be stable, metastable, or would BH quickly consume the orbiting particle? How much is life time of such “gravitational atom”? If such system is stable then what is the size of it; how much is the bonding energy of its ground state (=ionization potential energy) and how much are the energies of its exited states? Are those atoms “gravitational atoms” observable? What other properties do they have? Based on known physics we try to analyze the behavior of such exotic systems and answer the above questions for black holes of various masses.

Ryan Smith, Brigham Young University Geological Sciences Bhutan, a remote country in the Himalayas, has an underdeveloped economy that relies heavily on hydro-electric power and agriculture. Glacial lake outburst floods, or GLOFs, threaten both of these sectors of their economy. More importantly, they threaten human lives. In this study, I will estimate the increase in volume of the most rapidly growing glacial lakes in the Bhutanese Himalayas and investigate potential causes of their growth. In addition, I will develop a simple model to simulate the flooding effects of a GLOF on downstream cropland and villages.

Samuel Leventhal, University of Utah Physics The uncertainty existing within the scientific community as to why quantum mechanics (QM) behaves as it does comes from the fact there exists no mathematically sound approach for deriving the postulates of QM. It is the purpose of our research to present a derivation for the postulates of QM through the theory of Scale Relativity (SR), followed by a search for physical signatures of SR in the mechanics of celestial bodies. The construction of SR is based on an extension of the relativity principle to scale transformations coupled with a loss of differentiability. Our first paper presents the derivation of QM through scale relativity. During the SR derivation we also show fundamental qualities of QM, such as the presence of complex numbers in state functions. Lastly, the seemingly unrelated behaviors between relativity and quantum phenomena are shown a single mathematical formulation, only to change form due to scale. The new resolution variable within the adapted Schrodinger equation allows it to become applicable to macroscopic scales allowing us to look at large scale mechanics for signs of SR. Gravitation being scale invariant leads it to be a perfect candidate for experimental purposes. Our second paper investigates whether or not celestial bodies, formed by chaotic gravitational structuring, obey the properties of a Schrodinger equation dependent on the Keplerian potential. If so SR implies solar systems would form along probability distributions predicted by the square magnitude of the Schrodinger-Keplerian wave equation. In theory a planets probability distribution would depend on discrete variables, denoted orbital rank, n=n. In search for SR it is sufficient to see if planets tend to have orbital ranks near integer values. We start by calculating the orbital ranks within various solar systems, followed by testing whether the accumulation of planets’ rank near integer values is a probable event. To test this we take the squared difference between the calculated rank and the nearest integer. As a result we are able to test how likely orbital structuring will be discrete. Our results show a strong certainty that orbital rank is likely to accumulate near integer values.

Sally Hansen, Utah Valley University Chemistry Cytochrome c oxidase (CcO) or complex IV is the terminal component of the electron transport chain. In eukaryotic organisms, CcO is composed of 12-13 subunits. The core of eukaryotic CcO contains three mitochondrially encoded subunits that comprise the catalytic core of the complex and several gene products encoded for by the nucleus (1). Essential to the redox function of CcO are several critical cofactors: two hemes and two copper centers (2). The crystal structure of CcO has led us to several insights about its structural components and catalytic activity (3). However, a large set of nuclear gene products are essential for CcO activity that are not part of the structural machinery of the complex (4,5). These components have been implicated in various stages of CcO assembly including, heme processing and insertion (6), CuA and CuB site delivery and insertion (7), subunit processing and subunit assembly (8,9). Among them are well characterized CcO assembly factors that involve the biogenesis of the CuA and CuB sites in CcO. Sco I, Cox17, Cox 11 and Cox23 are all essential to CcO activity and have properties that appear to be critical to the maturation of the CuA and CuB sites(10-13). Cmc4 appears to be involved in cytochrome c oxidase biogenesis. Peroxide phenotypes have been linked to cytochrome c oxidase assembly (14). Saccharomyces cerevisiae strains lacking CMC4 were found to exhibit peroxide resistance when compared wild type parental stains. Resistance was seen in liquid culture and in media containing glucose and glycerol. These results may indicate that cytochrome c oxidase assembly is altered in CMC4 deletion stains.

Natascha Knowlton, University of Utah Chemistry The chemical derivatization of oxide surfaces (silica, alumina, glass) is critical to the development of separation media, sensing surfaces, or biocompatible interfaces. Presently, there are few analytical methods that allow the detection and characterization of functionalized monolayers on these surfaces. Raman scattering spectroscopy can provide useful structural information in the form of vibrational spectra of molecules of interest, and it is compatible with oxide substrates. Raman scattering, however, is a very weak effect so that its application to detecting monolayers is challenging. In this work, two approaches to detecting and characterizing molecular layers on oxide surfaces with Raman spectroscopy are compared. First, gold colloidal nanoparticles are deposited onto the surface of interest, which enhance the Raman scattering near the gold surface by surface-plasmon resonance. This technique is suitable for ex situ analysis of monolayers on planar surfaces. Secondly, monomolecular layers can also be detected by Raman scattering on porous oxide supports such as alumina or silica without any optical enhancement due to the very high surface area of these materials. Detection in porous particles is compatible with in situ monitoring of surface derivatization reactions. These two methods are compared for monitoring of reactions of silane-coupling agents and their subsequent functional group transformations on glass and silica surfaces.

Alyssa Brown, Southern Utah University Physical Science Coal Creek is a perennial stream that runs through Cedar City, Utah and drains into Rush Lake. The basin is a closed basin, meaning that most of the surface water will eventually become ground water, the main source of drinking water for Cedar City. Because of the increase of urbanization of this region in par- ticular, there is a higher probability of pollutants entering the water source and greatly affecting the quality of the drinking water. Most pollutants are characterized as nonpoint source pollution, which is defined by the Environmental Protection Agency (EPA) as, “land runoff, precipitation, atmospheric deposition, drainage, seepage or hydrologic modification” and is the leading cause of water quality problems (Environmental Protection Agency, 2012). Common sources of land runoff, as defined by the EPA, include septic waste, lawn and garden fertilizers, improperly disposed chemicals, automobile fluids, vehicle emissions, and road deicers (Environmental Protection Agency, 2012). In order to characterize the pollutants found in samples and determine the concentration of ions of interest, ion chromatography was used. By determining the identity and concentrations of particular ions, the presence of nonpoint pollution, and the source, may be determined. This study may lead to better indications of where major sources of drinking water pollutants are originating, illustrating the effect that urbanization and rapid population growth have on the quality of both surface and ground water. This will allow better characterization of pollutants and pollution sources in the future.

Joshua Jeffs, Utah Valley University Chemistry The electron transport chain (ETC) is a system within a cell that couples electron transfer between a donor and a receptor. The ETC is made up of several components, specifically: complexes one through four, a coenzyme Q, and a cytochrome complex. Cytochrome C oxidase (CcO), also known as complex IV, uses electrons and H_ ions to reduce molecular oxygen to water. CcO is made up of several subunits or proteins that are responsible for the function of CcO. The creation of CcO involves multiple steps that include many different gene products or proteins. (3) Of these proteins several are from a specific type of family called cysteine-X _-cysteine motifs (twin CX_C). The cysteine residues in the cysteine pairs are each spaced by nine residues. The best characterized protein of this group is Cox17, a copper-binding protein that plays a role in copper transfer to CcO. There are 14 potential proteins that are twin-Cx_C motifs (1). There were four knock out strains that showed resistance when plated on YPD with varying concentrations of hydrogen peroxide: 0.010%, 0.014%, 0.018%, and 0.022%. Strains lacking CMC4, MIC14, MIC17, and PET191 all showed resistance to hydrogen peroxide compared to the parental strain. Strains lacking MDM35 and COX23 showed sensitivity to hydrogen peroxide. These result may indicate a tie to impaired or incomplete cytochrome c oxidase assembly.

Rachel Nydegger, Utah State University Physics Multi-messenger astronomy employs both electromagnetic and gravitational-wave detectors to paint a richer picture of celestial objects, providing more depth and information. The interferometers utilized for gravitational-wave observations receive input from very broad fields of view on the sky, typically a few square degrees. To have simultaneous electromagnetic observations (typically less than one square degree) requires innovative techniques for the telescopes to find the origin of radiation. One idea is to “tile” the view of the interferometer, using multiple telescopes to simultaneously point at different areas of the field to observe the source. One difficulty of this observing paradigm is distinguishing random electromagnetic variable sources from a gravitational-wave counterpart. To better understand this problem, this project repeatedly observes a single field on the sky. Each observation is analyzed to count the number of sources that appear in the field as a function of brightness. Repeating this process over time will yield the frequency of random optical transients, as well as characterize the population and brightness distribution of variables in the field. Future work will extend this observation campaign to cover different galactic latitudes.

Jeremy Redd, Utah Valley University Physics Future space propulsion systems will likely use annihilation of matter and antimatter in propulsion system. Annihilation of matter and antimatter is not only the energy source of ultimate density 9×10^16 J/kg but also allows to utilize ultimate exhaust speed the speed of light c thus potentially allows to accelerate a payload to ultrarelativistic velocities. Such velocities make interstellar and even intergalactic travel possible in the lifetime of one generation only (20-30 years). In our presentation we discuss advantages and disadvantages of interstellar travel with relativistic and ultra-relativistic velocities. Using relativistic Tsiolkovsky rocket equation we also discuss the feasibility of achieving relativistic velocities with annihilation powered photon engine and technical challenges to build such engine.

Kelby Peterson, Utah State University Physics The State of Utah Space Environment & Contamination Study (SUSpECS) experiment flown on the Materials International Space Station Experiment 6 (MISSE-6) was an experiment designed to examine the consequences of the space environment on various materials used in space-component design. SUSpECS was comprised of approximately 180 samples that were suspended from the side of the International Space Station (ISS) for 18 months and returned to allow for pre- and post-flight comparisons. The sample with the most evident changes was a thin film of polyethylene terephthalate (PET) MylarTM coated with Vapor Deposited Aluminum (VDA). The post-flight analysis showed evidence of atomic oxygen erosion of the VDA layer, UV-induced discoloration of the polymer, and a crater created by a micrometeoroid impact. This presentation focuses on the UV-induced discoloration and laboratory tests to simulate these effects. The UV tests expose similar polymers to varying intensities of vacuum UV radiation from deuterium lamps over a condensed time span and quantify the discoloration of the polymers through comparison of the UV/Vis/NIR reflection spectra. The results from the UV simulation are used to determine the approximate time period of the UV exposure for the SUSpECS sample and in turn the erosion rate of the VDA layer.

Cathy Crawford, Utah State University Chemistry and Biochemistry In the spirit of many chemistry instructors’ longstanding interest in making teaching labs less “cookbook-like” and more research-driven, we recently restructured our second-semester sophomore organic chemistry lab to include a synthesis project that was chosen, designed, and carried out by students. Students were given the incentive of co-authorship on any publications resulting from their work. This led to the development of total syntheses of JBIR-94 and JBIR-125, new antioxidative/anticancer compounds with radical-scavenging potencies comparable to those of a-tocopherol, the active constituent in Vitamin E. Our presentation will summarize our progress and findings, and includes our progress on bioactivity studies conducted on the JBIR’s and their synthetic precursors.

Alyssa Brown, Southern Utah University Physical Science It has been long debated whether early astronomers could truly see any detail during their first observation and rough sketches of the satellites of Jupiter. Many have argued against the accuracy and validity of such drawings, claiming the lack of technological advance led to rough hewn and mediocre drawings with little evidence of these individuals having truly seen these satellites. Through our research, we hope to prove validity in those early sketches based on current knowledge. By converting the dates and times each early sketch was created into Julian Calendar days, then using the date obtained to calculate the position of each individual satellite of Jupiter, as well as the face that was approximately facing Earth at the time the sketch was made, we can compare current images to those previously obtained sketches. By analyzing the sketches for determining features as well as the relative location of those features in relation to their approximate location on the satellite face the astronomer was most likely observing, we can either validate or disclaim these early sketches. This experiment will provide beneficial insight into the accuracy of primitive sketches made centuries before more detailed information was discovered about the celestial bodies that continue to fascinate us. The information gained from this experiment may even lend a greater knowledge and understanding of how to study these celestial bodies, since if the information presented by these early sketches were accurate, we could potentially reevaluate the manner in which we currently conduct our present observation.

David Pease, Utah Valley University Physics Transition regions to higher resonant modes of a bottle-shaped thermoacoustic prime mover (neck: 5.39 cm long, 1.91 cm ID; variable cavity with a sliding piston: up to 38 cm long, 4.76 ID) were studied. As the piston is extended, lengthening the cavity, starting from the neck, a transition of the dominant frequency from the fundamental to the first overtone occurs. However, when the length is then shortened, transition back to the first mode does occur at the same piston position, revealing hysteresis. Within the window of hysteresis for the cavity length, either state of the fundamental or first overtone is possible. Transition regions to higher modes continue as the length of the cavity is increased. The position and width of the hysteresis was studied for the first two transition regions as a function of input power and stack volume filling factor. Input powers studied were between 12.0 and 16.5 W and volume filling factors for the stack were about 3.0, 3.7 and 4.9%. The transition regions occurred with cavity lengths between 12.6 and 14.0 cm for the first transition and between 25.0 and 27.8 cm for the second transition. Preliminary results indicate that the transition region occurs shallower in the cavity and the hysteresis widens as the input power is increased. The hysteresis is wider for the second transition region. Decreasing the stack mass causes an increase of the hysteresis width, but has no strong effect on the hysteresis depth.

Ben LaRiviere, Utah State University Geology The DOE-funded HotSpot Project out of Utah State University has collected a more than mile-deep core from the central Snake River Plain, Idaho, to study the geologic history of the area. The core consists mostly of volcanic basalt, however 16 sediment layers have been identified and sampled between the basalt-flow layers. These layers of sediment are the key to understanding environmental conditions on the Snake River Plain between basalt flows. The sediment was sampled in 25cm increments and the grain size of the sediments were examined in a laser particle size analyzer to better understand depositional conditions on the snake river during the past 5 million years. The analysis revealed that the majority of the sediment was deposited as windblown silt with several fluvial deposits.

Kent Hartley, Utah State University Physics Faraday cups provide a simple and efficient apparatus to measure the absolute magnitude of charge particle fluxes, and with the addition of a retarding field analyzer and defining apertures the capability to determine the energy and angular distributions of the fluxes. Through careful design of the electron optics, a Faraday cup can be tailored to meet specific requirements for detector size, minimum detectable flux, collection efficiency, absolute accuracy, energy discrimination, and angular resolution. This work explores design concepts through electric field and charged particle trajectory simulations, theoretical analysis, and evaluation of experimental prototypes to develop compact, high efficiency Faraday cups capable of a range of energy and angular resolutions. The designs rely on high efficiency Faraday cups coupled with grid-free Einzel lens energy analyzers for nearly energy-independent determination of absolute fluxes. We also review specific designs and applications of these Faraday cup detectors to electron emission and transport studies, spacecraft charging applications, and electron beam characterization measurements done in conjunction with various projects conducted by the Materials Physics Group.

Beau Hilton, Brigham Young University Physics/Acoustics The Udu drum, sometimes called the water pot drum, is a traditional Nigerian instrument. Musicians who play the Udu exploit its aerophone and idiophone resonances. This paper will discuss an electrical equivalent circuit model for the Udu Utar, a specific type of Udu, to predict the low frequency aerophone resonances and scanning laser vibrometer measurements to determine the mode shapes of the dominant idiophone resonances. These analyses not only provide an understanding of the unique sound of the Udu instrument but may also be used by instrument designers to create instruments with resonance frequencies at traditional musical intervals for the various tones produced and to create musical harmonic ratios.

Joseph Jensen, Utah State University Physics The earths ionosphere is very important in our everyday life. During large solar flares the ionosphere expands to the point of disrupting communications from GPS, military, and commercial communications satellites, and even radio blackouts can occur. The EVE instrument on the SDO satellite has given unprecedented spectral resolution for the Extreme Ultraviolet (EUV) spectrum with a time cadence of 10 seconds. This has made it possible to analyze flare spectra as never before. Using the Time Dependant Ionospheric Model (TDIM) we have input this new spectral data for large solar flares and analyzed the effect on the ionosphere. We take as a test case the X1.6 flare on March 9, 2011. Even this minor X-class provides insight into how the ionospheric layers respond differently to solar flares.

Jacob Wright, Utah Valley University Physics Dissonant overtones of closed bottle-shaped thermoacoustic prime movers are discussed. The resonator consists of two concentric cylinders with differing cross-sectional areas, closed at the outer ends. The condition for resonance results in a transcendental equation, which is solved numerically. The neck and cavity behave as coupled resonators, where the neck is a quarter-wave resonator and the cavity is a half-wave resonator. A variable cylindrical cavity with a sliding piston was constructed to study the nature of the device as the cavity length is varied. The stack is located in the neck region and the length and inner diameter of the neck are 5.39 and 1.91 cm, respectively. The inner diameter of the cavity is 4.76 cm and has a maximum length of 38 cm. The dominant mode of operation depends on the length of the cavity, favoring successively higher modes as the cavity length increases. The volume filling factor of the stack material was varied from 2 to 5% to determine whether the amount of stack material affects the transitions. These filling factors were selected to yield hydraulic radii comparable to the thermal penetration depth for the highest and lowest possible fundamental frequencies of the system. The transition to higher modes occurs roughly where the higher mode overlaps with the fundamental frequency of the neck region, and is independent of the stack filling factor. With the given dimensions, three transitions to higher modes were observed, with frequencies consistent with the model.

Michael Strange, Utah State University Geology For the past century, the standard technique used to interpret soft-tissue preservation in the fossil record has been the camera lucida drawing. A new technique called False Color Treatment (FCT), which uses digital photography and photo manipulation, shows an increased ability to not only interpret soft-tissue features but also identify trace amounts. Hyolithids from the Cambrian of northern Utah were used to test the capabilities of FCT. Results were then compared to camera lucida drawings of the same specimens. Comparisons show the camera lucida drawings missed areas of soft-tissue that FCT found. Depending on the specimen, and the type of preservation, this disparity in interpretations can increase or decrease. Hyolithid specimens from the Spence Shale show an odd form of Burgess Shale Type (BST) preservation which makes them particularly well suited for FCT manipulation. Overall, False Color Treatment provides an informative and aesthetic method for interpreting soft-tissue fossils with BST-like preservation.

Jennifer Campbell, Utah State University Psychology Eating disorders are pervasive mental illnesses that overwhelm the lives of individuals who struggle with them. For individuals with anorexia nervosa or bulimia nervosa who do not respond to other treatments, Acceptance and Commitment Therapy has the potential to be effective. This presentation looks to orient researchers to Acceptance and Commitment Therapy while supplying a potentially useful treatment option for those who struggle with clinical anorexia nervosa or bulimia nervosa. The current literature comes together to support the effectiveness of Acceptance and Commitment Therapy for the treatment of eating disorders, specifically anorexia. This presentation focuses on the symptomatology and physical effects of anorexia and bulimia, as well as core principles and processes of Acceptance and Commitment Therapy. Future directions regarding the effectiveness of Acceptance and Commitment Therapy can be broadened to include adolescents as well as other types of eating disorders, such as binge eating disorder and eating disorders not otherwise specified.

Lauren Miller, Utah State University Psychology Affective disorders such as depression, phobias, schizophrenia, and post-traumatic stress disorder impairs the ability to time in the seconds-to-minutes range, i.e., interval timing. We investigated the effect of chronic administration of selective serotonin reuptake inhibitor fluoxetine (FLX) when anxiety-inducing task-irrelevant distracters are presented during an interval timing task. Given that some anti-depressants have beneficial effects on attention and working memory, e.g., decreasing emotional response to negative events, we hypothesized that FLX would decrease activation of amygdala and increase activation of prefrontal cortex. Our results revealed differential activation of amygdala and prefrontal cortex in FLX and vehicle treated rats corresponding to the expected changes in behavior. Results are discussed in relation to the brain circuits involved in interval timing and emotional processing, and the pharmacological management of affective disorders.

Dani Willis, Utah State University Political Science In this era of increasing complex electric utility corporate restructurings, prudence review is an important analytical tool that should be applied by state regulatory commissions in an informed and reasonable manner to address and balance risk sharing between electric utility investors and utility ratepayers. The payer examines the legal and economic considerations concerning the development and application of the analytical tool of prudence review by state regulatory commissions concerning the revenue requirement regulation of electric utilities.

Yoon Lee, Utah State University Family, Consumer, and Human Development Drug abuse in America is a major problem that has been well documented throughout history. Marijuana use has increased among most age levels and is the most abused illicit drug in America. Cocaine use has also increased over the past decade. Possibly the most alarming trend is the fact that hospital visits due to drug abuse of any kind are dramatically increasing each year. Using data from the National Survey on Drug Use and Health (2010), this study explored to what extent adolescents and young adults were involved with Marijuana or Cocaine abuse and to investigate factors associated with their use of such illicit drugs. For the data analyses, the total sample included 37,926 individuals between the ages of 12 and 25; the sub-sample of this study consisted of Adolescents between the ages of 12 and 17 (n=18,622) and young adults between the ages of 18-25 (n=19,304). The descriptive statistics suggested that among the study sample, 35.3 percent reported they ever used marijuana, while 7.5 percent reported they ever used cocaine. The results of logistic regression analyses show that all else being equal, age, health, gender, race, county size, and illicit drug addiction are statistically significant in predicting the likelihood of reporting marijuana experience among young adults between ages of 12-25. Similarly, the results of logistic regression analyses show that all else being equal, age, health, gender, education, race, county size, and illicit drug addiction are statistically significant in predicting the likelihood of reporting marijuana experience among young adults between ages of 12-25.

Noreen Barnes, Weber State University Political Science Many women in Guatemala suffer poverty and repression their entire lives. This situation is not unique to countries in Central America, but what is unique is the level of violence that is perpetrated in Guatemala compared with neighboring countries, the lack of engagement by law enforcement, and the complicity of the media. The Guatemalan civil war helped to create an atmosphere riddled with violence and alcohol. There is only a two percent conviction rate for murder. The majority of media outlets report on Femicide as if it were the woman’s fault she was killed; they portray her as a prostitute when there is no evidence to support the conclusion. In 2000 there were 213 femicides in Guatemala, by 2009 that number had jumped to 708 (Guatemalan Human Rights Commission 2010). My research has come from peer reviewed articles in both English and Spanish, Guatemalan government figures, personal experiences and international sources such as the World Health Organization. How do these details combine to create the perfect storm of increasing Femicide in Guatemala, and what can be done to help stop this tide of violence? There are women who have taken steps to improve their lives despite the many challenges they face. Micro-credit, small loans given to women to help them start or expand a business, have helped women who have a desire to flee abusive situations by giving them self-esteem as well as the financial means to accomplish their desires. There is a movement amongst women to convince their husbands to join Evangelical Christian churches that do not permit drinking in an effort to control rampant alcoholism. It will take time to alter the prevailing attitudes of machismo, prejudice, and lack of tolerance that threatens to drown the wonderful of Guatemala, but it can be done.

Kevin Lawanto, Utah State University Psychology Mice are excellent models for studying aggressive behaviors and the neural circuits underlying aggression. They identify their conspecifics through olfactory communication within the animal group (emission scent marking and detection of volatile and nonvolatile chemicals, such as pheromones). Anomalies in the perception and processing of olfactory cues may induce abnormal social behavior, anxiety or aggression. We performed a behavioral assessment of male NrCAM knockout mice and wild-type littermates. We found that NrCAM-deficient male mice exhibit increased aggression towards unknown conspecifics. Using cFos immunostaining, we revealed differences in neuronal activation between NrCAM knockout mice and wildtype littermates in a circuit relevant to processing of olfactory cues and male-specific behaviors (olfactory bulb, amygdala, bed nucleus of the stria terminalis and hypothalamus). These differences may be the result of misrepresentation of olfactory cues due to abnormal neuronal connectivity in the olfactory system. Our studies may be relevant to pathophysiological mechanisms responsible for abnormal social behaviors, aggression and anxiety.

Elizabeth Payne, Utah State University Anthropology This paper is an exploratory ethnographic research project designed to collect stories of health care experiences of childbirth in Cache Valley, Utah. By interviewing women who have given birth in Cache Valley, key themes have been identified as being significant to the childbirth community, these are; the Biomedicalization of childbirth; Tensions between the biomedical and holistic out-of-hospital approaches to births; Out-of-control pitocin use; and the Beliefs and Attitudes associated with giving birth. I compare the results with my own experiences as well as in the literature. The discussions raises issues of concern and an applied suggested course of action is offered to policy makers.

Eric Hastings, Utah State University Psychology Does building a new school facility change the quality of the school learning environment? If so, how enduring are these effects? Research shows some correlation between the physical environment of a school and student outcomes to. However, research fails to demonstrate that drastic changes to the environment through reconstruction influence those same outcomes. To investigate this relationship a group of newly built/reconstructed schools was identified and looked at longitudinally to measure the quality of the school’s learning environment two years before construction and four years after construction. To measure the school’s learning environment this research used the Indicators of School Quality survey (ISQ); a comprehensive survey system for school administrators to evaluate and monitor school improvement and accreditation efforts which provides information on the status of the schools learning environment, year to year progress and details about the conditions for learning produced in the classrooms. ISQ does this by measuring parent, teacher, and student perceptions of things such as parent support, teacher excellence, student commitment, school leadership, instructional quality, resource management, and school safety. In addition to the impact of school construction on a school’s learning environment, this analysis was extended to student attendance, safety, and student academic achievement. Data collected to this point supports the argument that school construction only has short term effects on a school’s learning environment, but no long lasting effect. Instead of investing in new facilities, schools and districts would be wise to first consider giving more attention to maintaining student and teacher relationships.

Alysha Waters, Utah State University Psychology Emotional distracters impair cognitive function. Emotional processing is dysregulated in affective disorders such as depression, phobias, schizophrenia, and post-traumatic stress disorder. Among the processes impaired by emotional distracters, and whose dysregulation is documented in affective disorders, is the ability to time in the seconds-to-minutes range, i.e., interval timing. Presentation of task-irrelevant distracters during a timing task results in a delay in responding suggesting a failure to maintain subjective time in working memory, possibly due to attentional and working memory resources being diverted away from timing, as proposed by the Relative Time-Sharing (RTS) model. We investigated the role of the prelimbic cortex (PrL) in the detrimental effect of anxiety-inducing task-irrelevant distracters on the cognitive ability to keep track of time, using local infusions of selective serotonin reuptake inhibitor fluoxetine (FLX). Given that some anti-depressants have beneficial effects on attention and working memory, e.g., decreasing emotional response to negative events, we hypothesized that FLX would improve maintenance of information in working memory in trials with distracters, resulting in a decrease of the disruptive effect of emotional events on the timekeeping abilities. Our results revealed a dissociation of the effects of FLX infusion in PrL between interval timing and resource allocation, and between neutral and anxiety-inducing distraction. FLX was effective only during trials with distracters, but not during trials without distracters. FLX reduced the detrimental effect of the distracters only when the distracters were anxiety-inducing, but not when they were neutral. Results are discussed in relation to the brain circuits involved in RTS of resources, and the pharmacological management of affective disorders.

Ariel Hargrave, Weber State University Psychology A review of the literature surrounding mental health literacy has suggested that there are many misconceptions about those with a mental illness. These misconceptions effect help-seeking, treatment, mental health policies, early intervention and social support. The National Alliance on Mental Illness (NAMI) offers a peer-to-peer taught class called Building Recovery of Individual Dreams and Goals through Education and Support (BRIDGES). This class addresses these misconceptions and aims to educate those suffering with mental illness on how to self-advocate. Research suggests that a peer-to-peer approach has been found useful in a consumer’s recovery process. Support and education are crucial in society’s understanding of mental illness and aids in their ability to strive towards a stigma free environment. The objective of this study is to measure the effectiveness of this class by conducting a pre and post assessment at the beginning of the class before material is presented and at the end of the class. A population of approximately 100 participants over the age of 18 diagnosed with a mental illness will be used. The assessment includes eleven total questions that identify key factors to recovery and mental health literacy. A five point likert scale will be used to measure participant’s responses. Data will be collected starting in January of 2013 and will be completed in March of 2013. Data will then be analyzed using a T-test in SPSS.

Zachary Cook, Utah Valley University Behavioral Science A Trend analysis of counseling visits to Utah Valley Universities (UVU) student health center was carried out between the months of January to October of 2012. During this time intake forms from students were examined in alphabetical order by HIPPA trained researchers and assessed for the frequency of the client’s visits along with their chief complaint as determined by the therapists. High frequencies of complaints such as depression, anxiety, and educational issues were reported from students attending the university in past studies beginning in 1999 at UVU’s health center. Researchers at Kansas State University used an instrument known as the Case Descriptor List to measure a therapist’s assessment of a client’s problems based on nineteen categories including items such as depression, anxiety, and educational/vocational issues (Benton, Robertson, Tseng, Newton, & Benton, 2003, p. 69). The basis of the present study was formulated by collapsing the nineteen categories into fourteen constructs for simplicity in order to determine the trend found between the years of 2006 to 2011. During this time 1,974 individuals obtained counseling services from UVU’s student health center. The research found that 56% of clients sought therapy for depression, 38.1% for anxiety, and 39.9% for educational assistance based on the stated categories. An increase in issues such as depression and anxiety has demonstrated the need for an increase in the number of trained therapists as it relates to the complexity of issues and co-morbidity. It has also shown the need for improved intake procedures, focusing on accurate diagnosis which the counseling center has recently adopted.

Dallin Webb, Utah State University Sociology, Social Work, and Anthropology Recent rediscovery of an ancient Fremont irrigation system in central Utah presents the opportunity to model the economics of Fremont irrigation agriculture. A significant cost of irrigation farming is the construction of a ditch to bring water from a natural source to the fields. We use an experimental approach to investigate the costs of ditch construction. Mountain mahogany digging sticks were employed to construct ditches under different sediment conditions, as well as a stream diversion into a ditch take-out. The experiments reveal a range of costs incurred for constructing different elements of the system.

Heather Sheffer, Utah State University Family Consumer and Human Development Background:

Austin LaBau, Utah State University History and Sociology At the beginning of the 19th century, there was only one public insane asylum in the United States. Together, this facility and a handful of private hospitals housed only a few hundred patients. By 1890, more than 74,000 Americans lived in mental institutions. A wealth of literature exists on the rise of the American insane asylum during this period; the evolution of modern psychiatry; and the philosophical, political, social, and ethical implications of the two. But what the literature lacks is a perspective on the rise of the asylum that recognizes its place in the developing urban environment. This project addresses that shortcoming by exploring a small group of institutions within the context of a single urban center; New York. In 1890, one-in-twenty-five Americans lived in what would soon become New York City’s five boroughs, alongside nearly one-in-ten of the country’s institutionalized insane. Upon opening, NYC’s massive insane asylums became a source of pride for city’s elites. Far from being hidden away, most of the asylums were built on islands in the East River—at the time, one of the busiest waterways in the world. Nestled between Brooklyn and Manhattan, the imposing structures and their residents lived in clear view of thousands of daily commuters, and inspired numerous poems, novels, and songs. However, it was not their largess that attracted international visitors like Charles Dickens and Alexis de Tocqueville, but the unique circumstances in which they operated. Throughout the 19th century, the intimate nature of NYC, where masses of impoverished immigrants lived only blocks from some of the richest and most powerful men in the world, helped make the city the site of violent class warfare, as well as a testing ground for social reform. Insane asylums were only a portion of NYC’s sprawling public welfare system, consisting of nearly a hundred public and private charitable institutions inn Manhattan alone. To explain how the insane asylum affected New York City, I examine essays, and photographs written and taken by doctors, patients, reporters, and reformers illustrate the significance of the insane asylum on New York City life.

Amanda Snow, Utah State University Psychology Past studies investigating attention have found that exposure to natural scenes have a restorative effect on attention in adults, allowing for the occurrence of effortless, involuntary attention. This is in contrast to exposure to urban scenes which do not show the same restorative effect on attention (Berto et al., 2005, 2008). The present study investigates the potentially restorative effects on childhood attention of exposure to natural scenes. In this study, 58 children ages 4 to 11 participated in a task which was attentionally taxing. Next, they were instructed to attend to pictures belonging to one of three conditions: “high fascination” (natural scenes), “low fascination” (urban scenes), or a control group (geometric shapes). Finally, the participants performed the initial attentionally taxing task once again. While accuracy remained constant across conditions, children demonstrated a greater decreased reaction time when exposed to high fascination natural scenes as opposed to low fascination urban scenes or the geometric shapes of the control group. Between the pre and post tests, mean differences of 37.7 milliseconds for the natural condition, 24.4 milliseconds for the urban condition, and 22.7 milliseconds for the control group was found. This suggests that exposure to high fascination natural scenes has a restorative effect on attention in children as it does in adults. This finding is important because it provides a mechanism by which the attentional capacities of children may be improved.

Trevor Hicks-Collins, Weber State University Psychology Austistic Spectrum Disorder (ASD) is an increasingly prevalent disorder, with approximately 1 of every 88 children in the United States diagnosed with the disorder. Several factors can exacerbate autistic symptoms in ASD children, including environment, diet, and sleep. Sleep problems in children with ASD’s occur more frequently than in non-ASD children, and their effects could be even more detrimental. The sleep literature in non-ASD children is clear about how sleep deficits adversely affect behavior and cognition, but there is little research to indicate the effects of sleep deficits on ASD children. This study was designed to assess the effect of sleep quality and quantity on ASD symptoms. The participants were children, ages 5-8, who were rated on the autistic spectrum. The children’s sleep was assessed using Actigraph monitors, which provided an objective measure of sleep quality and quantity. The children wore the monitors each night for one week. Also, parents and teachers kept daily records of the children’s sleep quantity and autistic behaviors, reporting both good and bad behaviors. A MANOVA was used to assess the effect of REM sleep, duration of sleep, and number of interruptions on autistic symptoms reported by parents and teachers. Results indicate that the amount and quality of REM sleep (both short-term and long-term) affects the frequency of autistic symptomology in children. In addition, results demonstrate that parents’ perceptions of sleep duration in their children is greatly distorted. Parents believe that their children are getting much more sleep than they actually are. Helping parents and teachers understand how important sleep is in affecting autistic symptomology can help modify behaviors. Studies like this are instrumental to providing us with information to better understand one of the fastest growing disorders affecting children today.

Stephanie Lawanto, Utah State University Psychology Mice are excellent models for studying social behavior. Anomalies in the perception and processing of social cues may induce abnormal social approach or sexual behaviors. We performed an assessment of social behavior in NrCAM knockout female mice and wild-type littermates. We found that NrCAM knockout mice exhibit social behavioral deficits (reduced interaction with unknown conspecifics). Analysis of neuronal activation in a circuit relevant to processing and response to olfactory cues (olfactory bulb, amygdala, bed nucleus of the stria terminalis, hypothalamus), using cFos immunostaining, revealed differences in neuronal activation between NrCAM knockout mice and wild type littermates exposed to unknown conspecifics. These differences may be the result of anomalies in neuronal connectivity in the olfactory systems in NrCAM knockouts. These studies have the potential to generate a new understanding of pathophysiological mechanisms responsible for abnormal social behaviors, and to identify new treatment strategies to reduce social deficits in autism spectrum disease patients.

Chance Christensen, Utah State University Psychology Affective disorders such as depression, phobias, schizophrenia, and post-traumatic stress disorder impairs the ability to time in the seconds-to-minutes range, i.e., interval timing. We investigated the effect of chronic administration of selective serotonin reuptake inhibitor fluoxetine(FLX) when anxiety-inducing task-irrelevant distracters are presented during an interval timing task. According to the Relative Time-Sharing (RTS) model, presentation of task-irrelevant distracters during a timing task results in a delay in responding suggesting a failure to maintain subjective time in working memory, possibly due to attentional and working memory resources being diverted away from timing. Given that some anti-depressants have beneficial effects on attention and working memory, e.g., decreasing emotional response to negative events, we hypothesized that FLX would improve maintenance of information in working memory in trials with distracters, resulting in a decrease of the disruptive effect of emotional events on the timekeeping abilities. Our results revealed independent effects of FLX on timing and resource allocation. Acute administration of FLX delayed timing, but this effect was eliminated after chronic administration. FLX reduced the detrimental effect of the distracters only when the distracters were anxiety-inducing, but not when they were neutral. Results are discussed in relation to the brain circuits involved in RTS of resources, and the pharmacological management of affective disorders.

Zachary Cook, Elizabeth Hanna, Harmony Jovey, Joseph Ammon Martin, Tyler McDonald, Shelby Randquist, George Rivera, Amy Sachs; Utah Valley University Sociology and Criminology National data concerning citizens’ opinions toward the death penalty is already available, but this data has a serious limitation because only 35 states allow for use of the death penalty (called retentionist states), and each of them uses it differently, so it makes little sense to look at national trends and attitudes and try to apply them to a particular state. It appears that the best method is to explore the attitudes within each retentionist jurisdiction (state) with the goal of obtaining data that will en- able attitudes to be compared and contrasted based on defined variables. This study explores the attitudes of Utah residents in two phases. In the first phase, 6,000 postal surveys were sent to a random sample of Utah residents in six purposively chosen cities (based on representative demographics). This instrument contained questions used in existing instruments and addition- al questions designed to address attitudes specific to the death penalty. The second phase consists of in-depth interviews with survey-respondents who strongly support the death penalty and strongly oppose the death penalty. They will be asked to elaborate on their responses to the postal survey questions and to describe which factors most influence their opinions concerning the death penalty.

Justine Larsen, Utah State University Political Science In recent years, the aggressive barred owl’s invasion of northern spotted owl territory has led to significant declines in spotted owl populations along the Pacific Northwest. In response to the owl’s waning population, the Fish and Wildlife Service (FWS) has implemented a plan under the Endangered Species Act (ESA) to kill the barred owl in a radical attempt to save the spotted owl. Applauded as revolutionary legislation, critical in protecting the Earth’s species from extinction, the ESA is decidedly far from the miracle bill its proponents laud it to be. A mere one percent of species protected under the ESA have successfully recovered enough to be delisted, and the ESA had little to do with these rare recoveries (Scheer & Moss, 2012). Observation and analysis of the spotted owl’s turbulent decline, reveals fundamental flaws specifically in basic theories on which the legislation was based. Particularly, the theory that nature, if left alone, will return to a natural state of balance (balance of nature theory) is a primary concept that has led the ESA astray numerous times, as evidenced by the FWS’ paradoxical plan to capture and kill one species in order to maintain a balance in the other species. This study reviews the balance of nature theory, providing research examining the effectiveness of the ESA and contributing to efforts to determine an appropriate and successful solution to species decline.

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.

Jason Chen, University of Utah Biology Both human language and birdsong are learned sensorimotor processes that require exposure to adult communication signals in order to be reproduced. The social aspect of the development of these vocal signals is distinctive because interaction is not required for the development of vocal signals in other organisms. Human infants isolated from interaction will not learn to speak normally. The need for interaction is also characteristic of the ontogeny of vocal signals in the zebra finch (Taeniopygia guttata), but only zebra finch males develop vocal signals, in the form of song. Juveniles raised in isolation will develop highly atypical song characterized by prolonged, monotonic syllables and irregular rhythms. When juveniles are tutored by these isolated birds in one-on-one conditions their song drifts towards normally raised birds. It is unclear how tutoring, as a social interaction, influences this observation. We hypothesized that different social experience influences birdsong. We predicted the song of juveniles raised in isolation with an experienced female to be closer to normal song than that of those raised in isolated sibling groups, or those raised in isolation. Current data suggest that the syntax and temporal features of song from juveniles raised in isolation with experienced females is indeed closer to normal song than that of isolated juveniles.

Harsh Kansagra, Southern Utah University Biology Anthoxanthum hirtum is a native grass with many traditional and modern uses, including human medicinal benefits. Populations are found locally in Utah, but at higher elevations, usually above 2500 m. Indigenous people used native sweetgrass in a variety of ways, including medicinally, as ceremonial incense, and in basketry. The active compound that elicits the sweet fragrance of the grass is produced by coumarin, a secondary metabolite used today both medicinally and commercially. Plants most often produce secondary metabolites, or essential oils, as a defense against pathogens, but these antimicrobial properties have not been investigated in A. hirtum. Our research used the Kirby-Bauer disk diffusion test to determine if closely related commercial diploid and polyploid sweetgrass strains (Anthoxanthum odoratum), as well as plants from native A. hirtum populations, produce zones of inhibition when tested against associated soil bacteria and fungi. Results of our research showed all species tested produced inhibition zones, but zone size varied in response to the secondary metabolites produced by each plant type. Despite this variation, these data suggest components of the essential oils may have antimicrobial properties. Results of this study increase our understanding of the antimicrobial properties of secondary metabolites produced by A. hirtum as well as the essential oils produced by commercial diploid and polyploid strains. Future studies will focus on identifying the chemical composition of each extract as well as the specific bacterial and fungal species associated with each plant.

Diego Cordero, University of Utah Biology Many zygotes and spores of brown algae are photosensitive and establish a developmental axis in accordance with directional light cues. Ectocarpus siliculosus is being advanced as a genetic and genomic model organism for investigating brown alga development, and this report investigates photopolarization of the growth axis of mitospores. When exposed to unidirectional light, mitospores photopolarized and established a growth axis such that germination was preferentially localized to the shaded hemisphere of the spore body. The roles of the microtubule cytoskeleton and endomembrane cycling in the photopolarization process were investigated using pharmacological agents. Disruption of microtubule dynamics progressively reduced the percentage of mitospores that photopolarized, while inhibition of vesicle secretion blocked photopolarization nearly completely. Chronic treatment with these pharmacological agents severely affected algal morphogenesis. Microtubules in mitospores and algal filaments were imaged by confocal microscopy. Mitospores contained a radial microtubule array emanating from a centrosome associated with the nuclear envelope. At germination, the radial array gradually transitioned into a longitudinal array with microtubules extending into the emerging apex. At mitosis, spindles were aligned with the growth axis of cylindrical cells in the filament, and the division plane bisected the spindle axis. These studies demonstrate that dynamic membrane cycling and microtubule assembly play fundamental roles in photopolarization, and provide a foundation for future genetic and genomic investigations of this important developmental process.

Travis Wood, Southern Utah University Biology Speckled dace, Rhinichthys osculus, is a small minnow that occupies river systems in Utah, Arizona, and Nevada. These minnows prefer clean, faster-moving water with plenty of cover such as rocks or undercuts. The invasive crayfish Orconectes virilis inhabits areas where the Virgin spinedace is found and has a similar diet being an opportunistic feeder. I tested the hypothesis that the natural behavior of Virgin spinedace will be altered due to the presence of crayfish. I predicted that the spinedace would avoid the crayfish and stay out in the open exposing them to a higher risk of predation, since crayfish are a more aggressive organism and will try and eat virtually anything they come into contact with. The experimental trials were conducted (N=24) in Quail Creek, Utah. Large plastic bins with the front and back replaced with screen were used to allow water flow through our experimental chambers. Each bin was placed in the creek and had rocks, and an undercut bank to resemble the native habitat. Controls consisted of placing isolated Virgin spinedace in one of the bins to observe its behavior. In both controls and experimental trials, either 2 spinedace, or 5+ spinedace were added. In experimental trials, I introduced 2 crayfish into the experimental chambers with the Virgin spinedace and allowed them to acclimate for 10 minutes. After the 10 minute acclimation period, behavioral observations were made. Results indicated that when 2 spinedace were present along with the crayfish, they would stay out in the open and the crayfish would occupy the cover or undercut. When 5+ spinedace were present with crayfish, the spinedace displayed a mobbing or “strength in numbers” behavior where they would occupy the undercut and either clog it up with their presence so the crayfish would leave, or mob the crayfish to make them leave. This behavior was opposite of what I predicted would happen. Since this mobbing or “strength in numbers” behavior was not observed with the samples of just 2 spinedace, this may be a behavioral adaptation resulting from the presence crayfish. Further research can be done on the behavioral effects of various fish species in the presence of introduced or invasive species to determine if this behavior is seen in other fishes.

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.

Sarah Miller, Southern Utah University Agriculture and Nutrition Science The high intake of fat in the average American diet is a growing concern to the nutritional community. High levels of total fat intake increase cardiovascular disease (CVD) which is the number one killer in America. The successful development of low fat recipes that can be accessed and produced by the general population is valuable to the fight against obesity and CVD. If acceptable products can be made with lower fat content then it is possible to lower the fat intake in a person’s diet. This study is designed to test the acceptability of low-fat desserts using every day food products available for home use as fat substitutes. Four popular “name-brand” recipes were altered by removing 55-73% of the fat and replacing it with a common food item, either pureed white or pinto beans, applesauce or yogurt. Southern Utah University students were recruited via flyers, in class announcements, and word of mouth. Participants (n=56) were asked to taste and evaluate the four products. Afterwards they completed a short survey about their knowledge of low-fat food substitutes and acceptability of the products. Results and conclusions forthcoming.

Sarah Miller, Southern Utah University Biology As humans, we have the ability to change our diets if we are deficient in any specific nutrient. Many animals have the ability to change their diet if they are deficient in nutrients. However, for many carnivores, it is generally thought that a prey item will have the same nutritional composition as the predator body composition. Carnivores are limited nutritionally in their diet. This means that they only get nutrients from the prey that they are able to locate to consume. This study is investigating prey choice of invertebrate predators (wolf spiders) when their prey item has been altered to be deficient in one specific nutrient (lipid or protein). I predict that the spiders will be able to choose the correct prey item for the nutrient in which they are deficient. The total weight of flies eaten in each treatment will be measured to determine if wolf spiders select prey items based on the nutrient content of the prey. Results will be analyzed using a nested ANOVA.

Joshua Horns, University of Utah Biology There are numerous arresting differences between the hands of humans and those of chimps, principally among them the shortening of metacarpals 2-5, the relative increase in length of the thumb, and the development of separate musculature controlling flexion of the thumb. In addition to improving manual dexterity, these changes allow humans, in contrast to chimps and other apes, to make a buttressed fist with the phalanges pressed against the central palm and the thumb adducted onto the dorsal surface of the phalanges. We believe this hand posture greatly reduces the strain experienced by a fully formed fist when striking with force, thereby rendering the human hand as a more effective weapon. We tested this idea by manipulating the tendons in a cadaver arm to induce the hand to form into buttressed and non-buttressed conformations, and then tested each conformation by having the hand strike a hanging instrumented mass to measure the force of each strike. Additionally, the 2nd metacarpal of the hand was fitted with a strain gauge so that strain in the bone could be compared to the force of the strikes. The results of these tests showed that there was a significant drop in strain in the buttressed fist (in comparison to the non-buttressed) for a given force.