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Articles 1 - 16 of 16
Full-Text Articles in Life Sciences
H.F. Hauff Pruner Housing & Ergonomics, Erich E. Heilman
H.F. Hauff Pruner Housing & Ergonomics, Erich E. Heilman
All Undergraduate Projects
The technology of electric tree pruners in the current agricultural market has many engineering problems, including; a deficit in power output, excessive overheating, and ergonomics. The 3-man pruner team has coordinated with H.F. Hauff Co. Inc., an agricultural equipment company owned by Neil Hauff, to produce an electric pruner prototype which addresses these problems. The methods used to design the optimal pruner prototype includes traditional engineering stress analysis, force flow analysis, finite element software, and Solidworks modeling software. The construction of the pruner involved manual machining methods and C.N.C. (Computerized Numerical Control) mill technology. During the design process, the team …
Defining Biodiversity: A Local Assessment Of The Tahuayo River, Peru Using Self-Directed Photography, Rozsika D. Steele
Defining Biodiversity: A Local Assessment Of The Tahuayo River, Peru Using Self-Directed Photography, Rozsika D. Steele
All Master's Theses
The Área de Conservación Regional Comunal Tamshiyacu Tahuayo (ACRCTT), located in Loreto, Peru, protects 420,000 hectares of the Amazon basin. In 2009, the ACRCTT received formal government recognition after three decades of advocacy and conservation work by resident communities. Local resource users who live a subsistence lifestyle possess sophisticated Traditional Ecological Knowledge (TEK) that can be used to identify which constituents of biodiversity are culturally relevant. This information can help resource managers develop an operational definition of biodiversity. Self-directed photography is a research method that allows participants the opportunity to direct data collection and empowers them to visually communicate their …
Resolving Gnetum Evolutionary History, Angela Mcfadden
Resolving Gnetum Evolutionary History, Angela Mcfadden
All Master's Theses
Gnetum are non-flowering seed plants of the tropics, indigenous to South America, Africa, and Asia. This group of about 40 species is fascinating to botanists because it shares distinctive morphological characteristics with flowering plants, such as broad leaves, woody stems, and flower-like strobili. There are still questions surrounding the relationships within the genus of Gnetum. With that in mind, I focused my work on generating phylogenetic hypotheses, using two molecular data sets: a concatenation of over 60 different chloroplast genes (66,815 base pairs), and the whole chloroplast genome (128,772 base pairs). This allowed me to compare the two phylogenies …
Effect Of Prior Trauma Exposure On Alpha Amplitude, Heart Rate, And Self-Reported Negative Affect, Gina L. Denoble
Effect Of Prior Trauma Exposure On Alpha Amplitude, Heart Rate, And Self-Reported Negative Affect, Gina L. Denoble
All Master's Theses
This study was conducted to investigate whether the number of traumatic events an individual has previously experienced influences that individual’s physiological and psychological reactions when exposed to a negative affective stimulus followed by a mindfulness-based stress reduction (MBSR) intervention. Twenty-eight participants were placed into intact quasi-experimental groups based on their scores on the Traumatic Life Events Questionnaire (TLEQ). The negative affective stimulus consisted of a series of photos bearing negative affective valence. The photos were selected from the International Affective Picture System (IAPS), and paralleled the areas of trauma exposure evaluated by the TLEQ. All participants were exposed to the …
Analysis Of Fy Promoter And Hepatocystis Load In South African Vervet Monkeys (Chlorocebus Aethiops), Benjamin J. Gombash
Analysis Of Fy Promoter And Hepatocystis Load In South African Vervet Monkeys (Chlorocebus Aethiops), Benjamin J. Gombash
All Master's Theses
There are species of Hepatocystis and Plasmodium, related blood parasites, that enter the cell through a chemokine receptor, coded for by the Duffy antigen/receptor for chemokines in humans, and the FY*0 (FY Null) allele in the promoter of this gene results in the absence of this receptor on the exterior of the cell (Miller et al., 1977; Miller et al., 1975; Miller et al., 1976; Barnwell et al., 1989; Perkins and Schall, 2002; Martinsen et al., 2008; Tung et al., 2009). Humans without the receptor show resistance to multiple strains of Plasmodium (Tournamelle, et al., 1995; Zimmerman, et al. …
Effect Of Quantum Dots, Novel Biological Imaging Agents, In Liver Cells In Vitro, Utshaha Maharjan
Effect Of Quantum Dots, Novel Biological Imaging Agents, In Liver Cells In Vitro, Utshaha Maharjan
All Master's Theses
The use of Quantum dots (QDs) coated with polymer and functionalized with carboxylic acid groups in medical applications are explored. Their water solubility and exceptional stability in aqueous environments make them potentially useful for such applications as imaging and ligand attachments. However, there are concerns regarding the toxic effects of QDs and the minimal dose that can be used without producing any detrimental effects to organisms. In this study, QDs coated with the amphiphilic polymer coating tri-n-octylphosphine oxide and poly (maleic anhydride-alt-1-tetradecene (TOPO-PMAT)) which is functionalized with carboxylic acid groups were used to investigate their toxic effect in mouse liver …
Play In Immature Tibetan Macaques (Macaca Thibetana): Location, Use Of Play Signals, And Play Bout Termination At Mt. Huangshan, China, Kaitlin R. Wright
Play In Immature Tibetan Macaques (Macaca Thibetana): Location, Use Of Play Signals, And Play Bout Termination At Mt. Huangshan, China, Kaitlin R. Wright
All Master's Theses
In this study, I examined the relationship between play behaviors, play location, the frequency of selected play signals, and play bout termination in Tibetan macaques (Macaca thibetana) during immature social play. I gathered video data at the Valley of the Wild Monkeys, Mt. Huangshan, China, and focused on 21 juvenile and infant macaques (zero to five years of age). I used an all occurrence sampling method to score play behaviors and play signals with an ethogram. I hypothesized that play groups would use play signals in functionally appropriate ways based on the location of the play bout, the …
Comparison Of Chimpanzee (Pan Troglodytes) Behavior On Tour And Non-Tour Days At Chimpanzee Sanctuary Northwest, Allison A. Farley
Comparison Of Chimpanzee (Pan Troglodytes) Behavior On Tour And Non-Tour Days At Chimpanzee Sanctuary Northwest, Allison A. Farley
All Master's Theses
In this study, I investigated the potential effect of a visitor program on captive chimpanzees’ (Pan troglodytes) behaviors at Chimpanzee Sanctuary Northwest (CSNW) in Cle Elum, Washington. I used focal animal sampling to score behaviors from an ethogram of affiliative, aggressive and abnormal chimpanzee behaviors, as well as foraging and vigilance. During each sample, I recorded the focal’s location within the enclosure and whether he or she was situated in locations that would be in view of visitors (present or not). I analyzed 720 minutes of data from each of the seven CSNW chimpanzees. I tested the hypothesis …
Comparison Of A Body Shape Index And Body Mass Index As Predictors Of Metabolic Syndrome: Nhanes 2007-2012, Rotana M. Radwan
Comparison Of A Body Shape Index And Body Mass Index As Predictors Of Metabolic Syndrome: Nhanes 2007-2012, Rotana M. Radwan
All Master's Theses
A newly calculated anthropometric measurement (A Body Shape Index, ABSI) was introduced as a more reliable index of body composition than waist circumference (WC) and body mass index (BMI). ABSI was reported as a stronger predictor for mortality. Thus far, the relationship between ABSI and Metabolic Syndrome (MetS) has not been studied on a large U.S. population. The purpose of this cross-sectional study is to determine whether ABSI is a better predictor of the risk of MetS and its individual risk factors than BMI on a large and diverse sample of the U.S. population using the National Health and Nutrition …
Confirmation Of Emx2 Protein Binding Partners, Cody Gillman
Confirmation Of Emx2 Protein Binding Partners, Cody Gillman
All Master's Theses
The neocortex is a structure within mammalian brains that processes sensory input from eyes, ears, and touch receptors and mediates the conscious use of skeletal muscles. The processing of information related to each of these types of functions is localized within discrete areas of the neocortex, which are separated by sharp borders. Proper development of these functional areas is regulated during embryogenesis by several transcription factors that are expressed in distinct gradients across the progenitor layer of the neocortex, the ventricular zone. Despite the vast amount of progress that has been made in describing how these transcription factors impact the …
Reaction To Stimulus Figures In Chimpanzee Drawings, Alexandra Bobrinskoy Casti
Reaction To Stimulus Figures In Chimpanzee Drawings, Alexandra Bobrinskoy Casti
All Master's Theses
Seven captive chimpanzees (Pan troglodytes) produced drawings at the University of Oklahoma between November 1971 and November 1972. Chimpanzees drew on sheets of paper that were either blank or had a stimulus. The stimulus was located in the center or offset from the center. These drawings were scanned and digitized. Analysis tested whether chimpanzee mark placement was contingent on the location of stimulus figures. Centroid locations significantly changed between stimulus type for all drawing categories and among participants for free choice and central figure drawings. Participants drew in the empty space opposite offset figure drawings. Findings support previous …
Seasonal Microhabitat Use Of Young-Of-The-Year Bull Trout, Salvelinus Confluentus, In A Drought Year, Ashton Brook Bunce
Seasonal Microhabitat Use Of Young-Of-The-Year Bull Trout, Salvelinus Confluentus, In A Drought Year, Ashton Brook Bunce
All Master's Theses
This study examined the microhabitat use of young-of-the-year (YOY) bull trout, Salvelinus confluentus, throughout the summer and fall of 2015 in Gold Creek, a third order Cascade Mountain stream near Snoqualmie Pass, WA. It is crucial to understand YOY habitat requirements, as this life stage is highly vulnerable to fluctuations in streamflow and various ecological risks associated with their dispersal. Previous research has demonstrated that YOY salmonids often occupy stream margins where they are sheltered from these kinds of threats. However, in the face of climate change, Pacific Northwest streams are more susceptible to decreased summer streamflows and elevated, irregular …
High Diversity Of Trypanosoma Cruzi Discrete Typing Units Circulating In Triatoma In Western Mexico, Uyen T. Nguyen
High Diversity Of Trypanosoma Cruzi Discrete Typing Units Circulating In Triatoma In Western Mexico, Uyen T. Nguyen
All Master's Theses
Chagas disease is caused by the protozoan parasite Trypanosoma cruzi, which is transmitted to domestic and sylvatic mammals via the feces of hematophagous hemiptera of the subfamily Triatominae (Reduviidae). Trypanosoma cruzi is found only in the Americas and displays remarkable genetic diversity. Seven discrete typing units (DTUs) are currently recognized (TcI–TcVI and TcBat). In Jalisco, Mexico, where Chagas disease has a high prevalence rate, TcI has historically been the only DTU reported. This study focused on the molecular identification of T. cruzi DTUs circulating in Triatoma near the Estación de Biología Chamela, on the southwest coast of Jalisco, Mexico. …
Everyday Farm Life In The Moxee Valley 1915-1950: Historical Ethnography, Terri Towner
Everyday Farm Life In The Moxee Valley 1915-1950: Historical Ethnography, Terri Towner
All Master's Theses
This study collected oral histories of those who lived or worked in the Moxee Valley, within the greater Yakima Valley of Washington State from 1915-1950. It documents and records the historical and cultural processes of farm life and its evolution for people living in this foremost hop-growing region of the United States. The larger goal is to characterize the community and social processes for use as primary source documentation to create historically accurate programs at the Gendron Hop Ranch-Living History Farm near Moxee. Nineteen participants were interviewed. Topics addressed in the study include farming in the Valley, the household, roles …
Testing The Forage Preference Of The American Pika (Ochotona Princeps) For Use In Connectivity Corridors In The Washington Cascades, Carly Wickhem, Kristina Ernest
Testing The Forage Preference Of The American Pika (Ochotona Princeps) For Use In Connectivity Corridors In The Washington Cascades, Carly Wickhem, Kristina Ernest
All Master's Theses
One of the aims of the Snoqualmie Pass East Project (SPEP) in the Cascades of central Washington is to construct nearly 30 wildlife crossing structures along a 15-mile stretch of Interstate-90. American pikas (Ochotona princeps) are being monitored for the SPEP because they have specific habitat requirements and are poor dispersers. Making the crossing structures “pika-friendly” will encourage these low-mobility animals to use the structures. Recent research suggests that the presence of quality vegetation may help pika populations avoid declines and extirpations, so planting suitable forage within and adjacent to the crossings will be essential. During the summer …
Activity Patterns, Home Range, And Microhabitat Selection Of A Terrestrial Turtle (Rhinoclemmys Rubida Perixantha) In A Tropical Dry Forest, Taggert G. Butterfield
Activity Patterns, Home Range, And Microhabitat Selection Of A Terrestrial Turtle (Rhinoclemmys Rubida Perixantha) In A Tropical Dry Forest, Taggert G. Butterfield
All Master's Theses
Turtles are in trouble worldwide, with nearly half recognized by the International Union for Conservation of Nature (IUCN) as needing special protection. The Eurasian pond and Neotropical wood turtles of the family Geoemydidae are the most diverse turtles and comprise ¼ of all turtle species yet basic information on their natural history is lacking. Moreover, seasonal tropical dry forest (SDTF), where many geoemydids exist, is considered the most endangered ecosystem in the world. We investigated the activity patterns, home range size, and microhabitat selection of the Mexican Spotted Wood Turtle (Rhinoclemmys rubida perixantha) in its SDTF habitat by …