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Theses/Dissertations

California Polytechnic State University, San Luis Obispo

2015

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Articles 31 - 38 of 38

Full-Text Articles in Life Sciences

A Preliminary Report On Escherichia Coli Strain Diversity In Cows, Alison T. Stivers Mar 2015

A Preliminary Report On Escherichia Coli Strain Diversity In Cows, Alison T. Stivers

Biological Sciences

Pyroprinting is a strain typing method that relies on the simultaneous pyrosequencing of the multi-copy rRNA intergenic transcribed spacer regions of E. coli (Black, et al., 2014). These pyroprints can be used to identify the source of E. coli in the environment. Currently, Cal Poly’s Center for Applications in Biotechnology (CAB) is augmenting the existing E. coli pyroprint library. By pyroprinting the intestinal E. coli of cows, we can quantify the strain diversity present, evaluate persistence, and determine the minimum sample size required for a complete overview of the cow intestinal E. coli population. These pyroprints can then be ...


Survey Of Phytoseiids (Acari: Phytoseiidae) On The Central Coast Of California, Maria Elena Murrietta Mar 2015

Survey Of Phytoseiids (Acari: Phytoseiidae) On The Central Coast Of California, Maria Elena Murrietta

Master's Theses and Project Reports

Phytoseiids were collected March through November, 2006 and 2007, from leaf samples of avocados, cherimoya, caneberry, grape, and strawberry from a combined total of 24 sites. The most diverse collection of phytoseiids was identified on grape with seven different genera and 12 different species followed by caneberry with 7 genera and 7 species. Strawberry was the least diverse with three genera and three different species. The most significant presence of type I and type II phytoseiids were located on caneberry and strawberry while avocado, cherimoya and grape were dominated by type IV species. Reasons for the difference in diversity could ...


Outdoor Adventure Therapy To Increase Physical Activity In Young Adult Cancer Survivors, Elizabeth C. Gill M.S., Suzanne Phelan Ph.D, Marni Goldenberg Ph.D, Heather Starnes Ph.D Mar 2015

Outdoor Adventure Therapy To Increase Physical Activity In Young Adult Cancer Survivors, Elizabeth C. Gill M.S., Suzanne Phelan Ph.D, Marni Goldenberg Ph.D, Heather Starnes Ph.D

Master's Theses and Project Reports

Physical activity (PA) has numerous benefits for cancer survivors, but limited research exists on PA interventions in young adult cancer survivors. Outdoor adventure therapy is a potential method of increasing PA in this demographic. The primary purpose of this non-randomized parallel group study was to determine whether the outdoor adventure camp experience (vs. wait list control) would increase participants’ PA levels immediately following the 7-day camp, as well as three months later. Secondary aims examined correlates of greater PA, including pre-post camp changes in sedentary behavior, exercise self-efficacy, environmental change self-efficacy, perceived barriers to exercise, physical activity enjoyment, and physical ...


Increasing Expression Of Hepatitis B Surface Antigen In Maize Through Breeding, Erin Suzanne Miller Mar 2015

Increasing Expression Of Hepatitis B Surface Antigen In Maize Through Breeding, Erin Suzanne Miller

Master's Theses and Project Reports

The hepatitis B virus (HBV) is a common virus, with two billion people infected worldwide. It causes approximately 600,000 deaths each year, despite the availability of an effective vaccine since 1982. Maize as a platform for oral vaccination can supply a heat stable vaccine, which does not require syringes or trained personnel to administer. The Hepatitis B Surface antigen was transformed into maize and this seed was used to evaluate expression levels through the breeding process. The transgene was transferred into two elite maize inbreds by backcrossing. Highest expressing ears were selected each generation until approximately 99% commercial parent ...


Identification Of Saccharina Groenlandica (Phaeophyceae) Around The Svalbard Archipelago: Dna Barcoding Using Cytochrome C Oxidase Subunit 1 (Coi), Anniken Lydon Mar 2015

Identification Of Saccharina Groenlandica (Phaeophyceae) Around The Svalbard Archipelago: Dna Barcoding Using Cytochrome C Oxidase Subunit 1 (Coi), Anniken Lydon

Master's Theses and Project Reports

In the Arctic, brown algae (kelps) and seaweeds are ecologically important: providing habitat, protection, and nutrients for invertebrate and vertebrate species living in nearshore environments. Migrations of biota between the North Pacific and North Atlantic Oceans have occurred periodically during Earth’s history leading to colonization of the Arctic Ocean. Around 3.5 Mya the “Great Trans-Arctic Biotic Interchange” occurred and the Laminariales order of kelp, thought to be of North Pacific origin, underwent a massive radiation and speciation event around the Arctic Ocean. Phylogenetic analysis performed on “Laminaria-like” specimens collected from six sampling locations around the Svalbard Archipelago ...


Native Small Mammal Use Of An Invasive Grass: Heermann's Kangaroo Rats (Dipodomys Heermanni) And Veldt Grass (Ehrharta Calycina) In Coastal California, Juliana P. Trunzo Mar 2015

Native Small Mammal Use Of An Invasive Grass: Heermann's Kangaroo Rats (Dipodomys Heermanni) And Veldt Grass (Ehrharta Calycina) In Coastal California, Juliana P. Trunzo

Master's Theses and Project Reports

Invasive species are generally regarded as detrimental to native communities because they cause increased competition and community structure alterations. There is therefore a critical need to understand the ecological processes underlying the establishment and spread of invasive species. While most studies to date have focused on the role of competition in species invasions, trophic dynamics may also play a fundamental role in the establishment and spread of non-natives, especially in cases when a non-native species experiences differential predation pressure relative to a native competitor. Herein I explore the potential for differential granivory pressure by a native rodent (Heermann’s kangaroo ...


The Proteomic Response Of The Carcinus Maenas Y-Organ Over The Course Of The Molt Cycle, Mark S. Hamer Feb 2015

The Proteomic Response Of The Carcinus Maenas Y-Organ Over The Course Of The Molt Cycle, Mark S. Hamer

Master's Theses and Project Reports

Molting in arthropods is a complex process governed by regulatory mechanisms that have evolved and adapted over millennia to allow these animals to grow, despite being confined by a hardened exoskeleton. We isolated the molt-regulating Y-organs (YO) from the common shore crab Carcinus maenas at molt stages B, C1-3, C4, and D0 to assess how changes in protein abundances might underline the unique physiology of each of these stages. We found that changes in protein abundance were most notable in the postmolt stages (B and C1-3), where an increase in energy metabolism and the reactive oxygen ...


The Effects Of Slow-Release Aluminum Sulfate On Bloom Color Of Hydrangea Macrophylla, Patrick James Edziak Jan 2015

The Effects Of Slow-Release Aluminum Sulfate On Bloom Color Of Hydrangea Macrophylla, Patrick James Edziak

Horticulture and Crop Science

Hydrangea macrophylla is a common greenhouse crop typically produced for the late winter and spring holidays. Most varieties are capable of producing either pink or blue flowers depending on aluminum content and pH of the growing medium. The goal of this experiment was to examine the effects of new controlled-release aluminum sulfate products on bloom color. This new product was applied as a topdress and a pre-plant incorporated mix using two different manufacturer recommended rates. Results were directly compared with those produced using a traditional water-soluble aluminum sulfate drench application. Controlled release aluminum sulfate was found to be at least ...