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  • New bioactive natural products from marine algae and cyanobacteria

    Creator:
    Sabry, Omar Mohamed
    Abstract:
    This thesis is an account of investigation on the natural products deriving from various marine algae and has resulted in the discovery of eleven novel bioactive metabolites. Isolation and characterization of these new molecules were carried out using different chromatographic techniques and by analyses of different spectroscopic data, respectively. Using...
    Resource Type:
    Dissertation
    Full Text:
    agent that is currently in phase Ill clinical trial is ecteinascidin 743 (11 ),22 isolated from the

  • Cultural controls for suppressing Phytophthora cinnamomi root rot of blueberry

    Creator:
    Yeo, John R.
    Abstract:
    Phytophthora cinnamomi is a soilborne pathogen that causes root rot disease of highbush blueberry (Vaccinium corymbosum L.). When new installations of susceptible blueberry cultivars are infected with P. cinnamomi, plants often fail to grow significant new tissue, greatly reducing yields over the life of the planting. Chemical fungicides are available...
    Resource Type:
    Dissertation
    Full Text:
    increase soil electrical conductivity (EC) beyond current recommended salinity guidelines for blueberries

  • Classical chaotic scatting from symmetric four hill potentials

    Creator:
    Bauman, Jordan Michael
    Abstract:
    Classical chaotic scattering experiments were performed on ten different four hill potentials, unique under x-axis reflection, given by: V(x,y) = x²y²e⁻⁽ˣ² ⁺ ʸ²⁾ σᵢ where σᵢ was ±1 depending upon quadrant. Our work was based on a paper (9) that only studied the case where σᵢ =1 in all quadrants....
    Resource Type:
    Masters Thesis
    Full Text:
    .663 ± 0.007, V2cO.683 + 0.010, V3=0.655 ± 0.011, V4A=O.7l4 + 0.010, V4B=O.743 + 0.003, VSA=O.74l

  • Physical activity recognition of free-living data using change-point detection algorithms and hidden Markov models

    Creator:
    Anderson, Michael M.
    Abstract:
    Physical activity recognition using accelerometer data is a rapidly emerging field with many real-world applications. Much of the previous work in this area has assumed that the accelerometer data has already been segmented into pure activities, and the activity recognition task has been to classify these segments. In reality, activity...
    Resource Type:
    Masters Thesis
    Full Text:
    0.005 0.01 0.05 0.1 0 20 40 60 80 100 False Positives / s D et ec tio n T im e (s

  • Habitat selection of hatchery and wild juvenile salmonids in Eagle Creek Basin, Oregon

    Creator:
    Brignon, William R.
    Abstract:
    To best manage Eagle Creek National Fish Hatchery and minimize any negative impacts that the current hatchery program may be having on Endangered Species Act-listed salmonids in the Eagle Creek Basin, I determined if wild fish are being displaced from preferred habitats by hatchery salmonids Oncorhynchus spp. This thesis had...
    Resource Type:
    Masters Thesis

  • Aryl acetylene substituent effects : the synthesis and application of biaryls

    Creator:
    Naffziger, Michael R.
    Abstract:
    The work described herein details the synthesis and application of biphenyls that probe the effects of hydrogen, Cl / Br, and methyl substituents on the aryl ring of the terminal acetylenic carbon. From this work, we successfully developed the rapid synthesis of phenyl acetylenes in 3-4 steps from inexpensive commercially...
    Resource Type:
    Masters Thesis

  • Three essays on constrained markets

    Creator:
    Siegel, Ryan
    Abstract:
    The three essays in this dissertation progressively answer the following questions: (a) How important are constraints? (b) Who benefits from removing constraints? (c) When does a constraint for a single market predominantly affect closely related markets? These questions are applied in the context of time, weather, and minimum wage constraints,...
    Resource Type:
    Dissertation
    Full Text:
    3 Region 4 Region 5 Region 7 Region 8 Avg. Subsample Size 237 774 462 627 1194 743 83 Time (LT

  • Correlation of NE 1545 expression and cell size in Nitrosomonas europaea exposed to a suite of aromatic hydrocarbons

    Creator:
    Gilroy, Caslin Anne
    Abstract:
    Ammonia oxidizing bacteria, including Nitrosomonas europaea, are inhibited by aromatic hydrocarbons which can be found in wastewater treatment plants. In recent studies, changes have been observed in N. europaea cell size upon exposure to benzene, but not toluene. Additionally, NE 1545, a gene proposed to be involved in fatty acid...
    Resource Type:
    Honors College Thesis
    Full Text:
    % Exposure Recovery % S iz e D ec re as e fr om C on tr ol 22.5 uM P henol 200 uM Aniline 120

  • Evaluation of bacterial community indicators of stream sanitary and ecological condition

    Creator:
    Bracken, Caragwen L.
    Abstract:
    The focus of this research was to develop bacterial community indicators of stream sanitary and ecological condition. The first study compared substrate utilization patterns between centrifuged and uncentrifuged split samples. We found a shift in the relative proportion of each group of bacteria following centrifugation, with a marked increased in...
    Resource Type:
    Dissertation
    Full Text:
    (FC), E. coli (EC), and the maximum Biolog Average Well Color Development (Max AWCD) and percent

  • Biologically active cyclic depsipeptides from marine cyanobacteria

    Creator:
    Medina, Rebecca A.
    Abstract:
    This thesis describes the chemical investigation of marine cyanobacteria collected in Madagascar and Panama with an emphasis on the isolation and structure elucidation of medicinally relevant secondary metabolites. A collection of the marine cyanobacterium Lyngbya majuscula from the Radames Islands, Madagascar yielded two new cyclic depsipeptides, radamamides A and B,...
    Resource Type:
    Dissertation
    Full Text:
    addition, ET-743 was granted orphan drug status from the European Commission (EC) and the U.S. Food and