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  • Drought, dispersal, and community dynamics in arid-land streams

    Creator:
    Bogan, Michael T.
    Abstract:
    Understanding the mechanisms that regulate local species diversity and community structure is a perennial goal of ecology. Local community structure can be viewed as the result of numerous local and regional processes; these processes act as filters that reduce the regional species pool down to the observed local community. In...
    Resource Type:
    Dissertation
    Full Text:
    . © Copyright by Michael T. Bogan July 10, 2012 All Rights Reserved Drought, Dispersal, and

  • Diversity and community structure of aquatic insects in isolated montane desert streams

    Creator:
    Bogan, Michael T.
    Abstract:
    Local aquatic insect diversity and community structure is the result of multiple local and regional factors, and observed patterns depend upon the spatial and temporal scale under examination. Isolated stream systems in arid regions represent a new challenge in understanding the drivers of diversity and community structure, as most studies...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Michael T. Bogan for the degree of

  • The role of costimulation and adjuvants in the development of T cell effector and memory responses

    Creator:
    Maxwell, Joseph R.
    Abstract:
    T cells are one of the key cells in the immune system. Although they are not the first line of defense against a pathogen, their functions can greatly enhance the phagocytosis and destruction of pathogens as well as the development of antibody responses. Furthermore, even when responding T cells have...
    Resource Type:
    Dissertation
    Full Text:
    Costimulation and Adjuvants in the Development of T Cell Effector and Memory Responses. Abstract approved

  • Uncovering the mechanism of IL-4-mediated T cell survival

    Creator:
    Moscibrocki, Cathleen M.
    Abstract:
    Although IL-4 is a well-characterized multi-functional cytokine, its role as a survival factor in T cells is not completely understood. In an attempt to uncover IL-4-mediated survival, we studied caspase activation in primary mouse T lymphocytes undergoing death by neglect, activation-induced or steroid-induced cell death. Here, we identify the executioner...
    Resource Type:
    Masters Thesis
    Full Text:
    Mechanism of IL-4-mediated T Cell Survival by Cathleen M. Moscibrocki A THESIS submitted to Oregon State

  • The influence of aryl hydrocarbon receptor activation on T cell fate

    Creator:
    Funatake, Castle J.
    Abstract:
    2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and related compounds are well-recognized for their immunosuppressive activity, which is mediated through an intracellular receptor and transcription factor, aryl hydrocarbon receptor (AhR). Laboratory animals exposed to TCDD are less resistant to infection and have severely impaired humoral and cell-mediated immune responses. This dissertation addressed the hypothesis that...
    Resource Type:
    Dissertation
    Full Text:
    Hydrocarbon Receptor Activation on T Cell Fate. approved: 2,3,7, 8-Tetrachlorodibenzo-p-dioxin (TCDD) and

  • Expression of Follicle Stimulating Hormone (FSHβ) and its Receptor (FSHR) within the Ovine Placentome

    Creator:
    Wu, Eleas M.
    Abstract:
    Follicle stimulating hormone (FSH) plays a key role in the ewe’s estrous cycle but understanding its continued importance during pregnancy is not well understood. Researchers have proposed a model theorizing that a cascade of hormones is responsible for pregnancy maintenance. Weems et al. proposed a model for placental progesterone production;...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Eleas M

  • Activation, modification and suppression of sex pheromone production in garter snakes

    Creator:
    Parker, M. Rockwell
    Abstract:
    Vertebrates communicate with one another and coordinate intraspecific reproduction by using a variety of sexually dimorphic signals, such as plumage, ornaments, sounds, and/or scents. These sexual dimorphisms are maintained by physiological factors, typically sex-specific hormones (though see Chapter 3 for an exception). The purpose of the research in this dissertation...
    Resource Type:
    Dissertation
    Full Text:
    , D. J., Jonik, R. H., Gorzalka, B. B., Newlove, T., Webb, B. and Walsh, M. L. 1991. Serum estradiol

  • Life History of the Northern Rubber Boa (Charina bottae) in Oregon

    Creator:
    Leppin, Mark V.
    Abstract:
    The Northern Rubber Boa (Charina bottae) is a small, secretive boa native to the Pacific Northwest. Despite this being possibly the highest latitude boas and one of only two boas native to the continental U.S., it has received surprisingly little attention. Most of the research on the natural history of...
    Resource Type:
    Masters Thesis
    Full Text:
    : _________________________________________________ Robert T. Mason The Northern Rubber Boa (Charina bottae) is a small, secretive boa native

  • Diversity combining ARQ over the m(> 2)-ary unidirectional channel

    Creator:
    Elarief, Noha
    Abstract:
    In diversity combining automatic repeat request (ARQ), erroneous packets are combined together forming a single, more reliable, packet. In this thesis, we give a diversity combining scheme for the m-ary unidirectional channel. A system using the given scheme with a t-unidirectional error detecting code is able to correct up to...
    Resource Type:
    Masters Thesis
    Full Text:
    error type in the systematic m-ary t-UED code [4, 5] is applicable to the binary Bose-Lin code [6] and

  • Investigations of regulatory T cell induction by 2, 3, 7, 8-Tetrachlorodibenzo-p-dioxin during a graft-versus-host response

    Creator:
    Marshall, Nikki B.
    Abstract:
    The immune toxicity of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) has been studied for over 35 years, but only recently has the profound immune suppression associated with TCDD exposure been linked to induction of regulatory T cells (Tregs). The effects of TCDD are mediated through binding the aryl hydrocarbon receptor (AhR), a ligand-activated transcription...
    Resource Type:
    Dissertation
    Full Text:
    Microbiology presented on December 1, 2009. Title: Investigations of Regulatory T cell Induction by 2, 3, 7