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Filtering by: Creator Anderson, Lillian L. Remove constraint Creator: Anderson, Lillian L. Committee Member Bottomley, Peter Remove constraint Committee Member: Bottomley, Peter

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  • Dinitroaniline-herbicide resistance in goosegrass (Eleusine indica) : ecophysiological aspects

    Creator:
    Valverde, Bernal E.
    Abstract:
    Growth of individual goosegrass (Eleusine indica (L) Gaertn.) plants of three dinitroaniline-herbicide resistant (R) and three susceptible (S) biotypes from North Carolina, South Carolina, and Mississippi was analyzed in greenhouse experiments. Leaf area and biomass measurements, including root, shoot, above-ground, and total dry weights were similar among the biotypes studied....
    Resource Type:
    Dissertation
    Full Text:
    for privacy A. P. leby and . R. Radosevich Growth of individual goosegrass (Eleusine indica (L

  • Effect of sulfur on dinitrogen fixation of alfalfa (Medicago sativa L.)

    Creator:
    Lopez-Jurado, Gerardo
    Abstract:
    Field experiments were established in 1982 and 1983 on a Woodburn silt loam soil (Aquultic Argixeroll) to examine the effect of S fertilizer on dinitrogen fixation and dry matter yield of 10 week-old seedling alfalfa (Medicago sativa L. cv. 'Apollo'). Six levels of S fertilizer (0 to 67.2 kg S/ha)...
    Resource Type:
    Dissertation
    Full Text:
    Dinitrogen Fixation of Alfalfa (Medicago sativa L.) Abstract approved: Redacted for privacy David B

  • Influence of atmospheric humidity on sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor.

    Creator:
    Hural, Kirsten
    Abstract:
    The influence of atmospheric humidity on three aspects of sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor., which causes rose powdery mildew, was studied on leaf disks of susceptible Rosa cultivar Samantha. To study conidiophore production, leaf disks were inoculated on the adaxial (upper) surface with conidia of S....
    Resource Type:
    Masters Thesis
    Full Text:
    : Redacted for Privacy N.r Dr. Duane L. Cr The influence of atmospheric humidity on three aspects of

  • Responses of algal populations to parasitism by Aphelidium chlorococcarum and chytrids in an Oregon sewage lagoon

    Creator:
    Woods, Wendy W.
    Abstract:
    The abundance of algal species and their parasites was monitored weekly for two years in a sewage lagoon at the Corvallis Airport, Oregon. During the cooler months, Euglena species were dominant followed by a Chlamydomonas assemblage in the spring and a predominantly Scenedesmus assemblage in the summer and fall. Parasites...
    Resource Type:
    Dissertation
    Full Text:
    Quatrano, Anne Anderson and Hugh Gardner for their guidance. I am grateful to my father, John Weller, for

  • Association of hydrophobic organic compounds with dissolved soil organic carbon

    Creator:
    Ochs, Michael
    Abstract:
    Volatile hydrophobic compounds (HOCs) brought into soil and sediment systems represent a serious threat to the environment. Dissolved organic carbon (DOC) may exert an important influence over the total aqueous solubility and mobility of organic pollutants through their incorporation into micelles or the formation of soluble complexes. To date, however,...
    Resource Type:
    Masters Thesis
    Full Text:
    solids (Hassett and Anderson, 1982). The generic term DOC refers to the water-soluble component of

  • Remediation of atrazine in irrigation runoff by a constructed wetland

    Creator:
    Runes, Heather B.
    Abstract:
    Due to its frequent use in agriculture and its frequent detection in surface water, atrazine was chosen as a model compound to study the treatment capability of a surface flow wetland used to remediate irrigation runoff at a container nursery near Portland, Oregon. Further evaluation of treatment of atrazine was...
    Resource Type:
    Dissertation
    Full Text:
    and soil microcosms receiving atrazine treatment (3.2 mg/L) and incubated with 14C-ethyl, 14C

  • Microbiological control of food spoilage and pathogenic microorganisms in refrigerated foods

    Creator:
    Al-Zoreky, Nageb
    Abstract:
    Microgard, a commercially-available pasteurized fermented milk, was found inhibitory to gram negative bacteria such as Pseudomonas putida, some well-known foodborne pathogens (e.g. Salmonella, Yersinia and Aeromonas) and some fungi as revealed by an agar incorporation assay method. Gram positive bacteria, however, were not inhibited. Rather, some bacteria in this group...
    Resource Type:
    Masters Thesis
    Full Text:
    peptone water (l/lO2 - l/io?). Different media were used as well as addition of some substances

  • Physiological response of Nitrosomonas europaea to oxytetracycline, chromium, and silver

    Creator:
    Schaerer, Morgan A.
    Abstract:
    Nitrosomonas europaea carries out the first step in the biological nitrogen removal process in wastewater treatment by oxidizing ammonia to nitrite. It has been shown to be sensitive to a wide range of contaminants. The antibiotic oxytetracycline and the heavy metals chromium and silver have been found in wastewater influent....
    Resource Type:
    Masters Thesis
    Full Text:
    all the technical help. A big thank you to Caslin Gilroy, Kristin Egan, and Joe Anderson for their

  • Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

    Creator:
    Hoefnagels, Mariëlle Henriette, 1965-
    Abstract:
    Fusarium spp. are among the most important pathogens of Douglas-fir (Pseudotsuga menziesii) seedlings in bareroot nurseries. Currently the most effective disease control method is soil fumigation with methyl bromide. As methyl bromide is phased out, however, other disease management strategies may become more important. We explored two alternative approaches to...
    Resource Type:
    Dissertation
    Full Text:
    , 1985), longleaf pine (Pawuk, 1978), slash pine (Anderson et al., 1984), spruce (James, 1987), and

  • Analysis of Bacteroidales 16S rRNA gene sequences from a geographically isolated human population

    Creator:
    Petersen, Carolyn A.
    Abstract:
    Standard methods of measuring fecal pollution in water do not distinguish between human and non-human sources. Molecular technology enabled the development of host-specific markers that distinguish fecal sources. Human specific PCR primers, HF183F and HF134F, were designed based on phylogenetic analyses of partial 16S rRNA gene sequences from the Bacteroidales...
    Resource Type:
    Masters Thesis