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Filtering by: Creator Pedroza-Gutierrez, C. Remove constraint Creator: Pedroza-Gutierrez, C. Decade 1980-1989 Remove constraint Decade: 1980-1989

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  • Aspects of the field and developmental biology of a Apanteles yakutatensis, a parasitoid of Autographa californica

    Creator:
    Madar, Robert John
    Abstract:
    Behavioral and ecological aspects of the field and developmental biology of Apanteles yakutatensis (Ashm.), a primary larval parasite of the alfalfa looper, Autographa californica (Speyer), were investigated in 1980 and 1981. Populations of A. yakutatensis were found in commercial peppermint, alfalfa and crimson clover fields involving two areas (Willamette Valley,...
    Resource Type:
    Masters Thesis
    Full Text:
    average of 2.5 days. The larvae of A. yakutatensis required 162 degree days above 10.5°C to complete

  • Orange tortrix : parasitoid complex and thermal constants for egg hatch

    Creator:
    Coop, Leonard Bryan
    Abstract:
    An investigation was conducted in 1980 and 1981 on the larval parasitoid complex of the orange tortrix, Argyrotaenia citrana (Fern.), a major contaminant in cane fruits (Rubus spp.) in the Pacific Northwest. A total of 13 parasitoid species were reared from 1,350 larvae predominantly collected from red raspberries in western...
    Resource Type:
    Masters Thesis
    Full Text:
    in caneberries, overwintering habits, developmental rates and adult longevity at 20°C. The

  • Classical biological control of the filbert aphid, Myzocallis coryli (Goetze) (Homoptera:Aphididae) in western Oregon

    Creator:
    Messing, Russell H.
    Abstract:
    A classical biological control project was undertaken against the filbert aphid, Myzocallis coryli (Goetze), in western Oregon. Hazelnut orchards in Spain, France, and Italy were searched for natural enemies of the aphid, and a parasitic wasp, Trioxys pallidus Haliday, was imported, quarantined, mass-reared, and released in Oregon orchards. The wasp...
    Resource Type:
    Dissertation
    Full Text:
    indicate a higher developmental threshold for overwintering parasitoid pupae (7.4° C.) than for

  • Smooth and roughened horizontal cylinders in periodic waves and current

    Creator:
    Teng, Chung-chu
    Resource Type:
    Dissertation
    Full Text:
    . Timothy C. Kennedy; and Dr. Philip E. Humphrey. During his graduate studies, the author received

  • Specific enzymic interactions relating to the mechanism of action on certain 2-chloroethyl nitrosoureas

    Creator:
    Babson, John Robert
    Abstract:
    Certain 2- chioroethyl nitrosoureas have been demonstrated to be highly specific inactivators of chymotrypsin in vitro and glutathione reductase, both in vivo and in isolated rat hepatocytes. The inactivation of glutathione reductase in isolated hepatocytes resulted in an increased sensitivity toward an adriamycin induced oxidative challenge. Prolonged incubation of 1-(2-chloroethyl)-3-([1-¹⁴...
    Resource Type:
    Dissertation
    Full Text:
    for the degree of DOCTOR OF PHILOSOPHY in Biochemistry presented on 10(:),I,AJT- 3,(1 )c-b Title

  • Random wave forces on cylinders

    Creator:
    Hsu, Ming-kuang
    Abstract:
    The in-line force power spectrum is predicted by the frequency domain maximum force coefficient [C[subscript μn](z,f[subscript n])] vs. Keulegan-Carpenter number [K[subscript n] (z,f[subscript n])] relationship. The frequency domain Keulegan- Carpenter number is defined as the velocity from the amplitude spectrum at f divided by the respective frequency and diameter of...
    Resource Type:
    Dissertation
    Full Text:
    frequency domain maximum force coefficient closely follows the relation C pn (z,fn ) = 21- 2 /Kn(z,fn) for

  • Characterization of a ras gene in rainbow trout

    Creator:
    Mangold, Kathy A.
    Abstract:
    The rainbow trout (Oncorhynchus mykiss) model of chemical carcinogenesis is becoming increasingly important as a supplement to rodent studies. However, much of the molecular biology of the carcinogenic response is still unknown in the trout model. The ras gene family has been implicated in the tumorigenesis of both spontaneous and...
    Resource Type:
    Dissertation
    Full Text:
    from trout genomic DNA and hybridized with a human c-Ha-ras sequence. The initial amplifications of

  • Syntheses of large ring hormone analogs

    Creator:
    Yue, Stephen T.
    Abstract:
    The (±) 8,9:13,14-diseco-norestradiol, a large ring hormone analog, and its related derivatives, were prepared by a ring expansion approach. The key step of this approach is the establishment of the benzocyclododecenone system via the Caubere reaction. This step not only provides a favorable ring size, it also sets the necessary...
    Resource Type:
    Dissertation
    Full Text:
    of the 5,10-seco, C-ring aromatic hormone analog, 4'-acety1- 7-methoxy-1,2-benzocyclodecene

  • Regional population dynamics of Argyrotaenia citrana in Northwest caneberry : phenology, overwintering survivorship, and movement as measured by pheromone traps and larval sampling

    Creator:
    Knight, Alan Lee
    Abstract:
    Developmental requirements were determined for both larva and pupa as 503 and 176 degree-days (dd) above a lower threshold of 5°C. Adult emergence occurred from 300 to 700 dd accumulated from January 1st. Cumulative male emergence preceded female's by 50 - 80 dd. A PETE phenology model modified to include...
    Resource Type:
    Dissertation
    Full Text:
    both larva and pupa as 503 and 176 degree-days (dd) above a lower threshold of 5°C. Adult emergence

  • Characterization of the collagen protein in smooth pink shrimp (Pandalus jordani)

    Creator:
    Akel, Phillip John
    Abstract:
    The collagen content and composition of collagens in different age classes of shrimp were determined. Their physical and chemical characteristics were investigated. The interrelationship of shrimp size and muscle collagen content to raw and cooked meat yield was established. Total collagen content for three lots of round shrimp with weights...
    Resource Type:
    Masters Thesis
    Full Text:
    structure of the species. The yield (% dry wt.) of raw and cooked (100 sec; 101 C in steam) derived