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  • Glass capillary gas chromatographic analysis for trace amounts of cyclopropenoid fatty acids

    Creator:
    Ryan, Daberath
    Abstract:
    Dietary cyclopropenoid fatty acids (CPFA) have long been known to cause pronounced physiological disorders in both farm and laboratory animals. Past work has shown CPFA to be a powerful promoter of carcinogenesis in trout, rats and mice. Sterculic and malvalic acids (CPFA's) are found in seed lipids of plants from...
    Resource Type:
    Masters Thesis
    Full Text:
    other members of my graduate committee, Drs. M. Hudson, W. Sandine, and W. Denison. Special thanks

  • Polyphenol oxidase of D'Anjou pears (Pyrus communis L.)

    Creator:
    Halim, David Husien
    Abstract:
    Stability, substrate and inhibitor specificity and electrophoretic properties of a crude polyphenol oxidase (PPO) preparation extracted from d'Anjou pears (Pyrus communis L.) were investigated. Levels of polyvinylpyrrolidone and pH of buffer for extraction were found to affect the specific activity of the extracted enzyme. An extract prepared with 1.5 g...
    Resource Type:
    Masters Thesis
    Full Text:
    wish to express my appreciation to Dr. W. E-. Sandine for serving on my graduate committee

  • The role of ethanol and certain ethyl esters in the fruity flavor defect of Cheddar cheese

    Creator:
    Bills, Donald D.
    Abstract:
    During the course of ripening, Cheddar cheese frequently develops a flavor defect described as fruity. Recent work has indicated that the use of certain starter cultures ultimately results in the development of the defect as the cheese ages. The flavor compounds responsible for the defect, however, have not been elaborated....
    Resource Type:
    Dissertation
    Full Text:
    . Montgomery, Dr. B. E. Christen- sen, and Dr. W. E. Sandine; who have contributed their

  • Survival of fecal coliform bacteria in sludge-amended soils

    Creator:
    Hartel, Peter G.
    Abstract:
    A study was conducted to determine the effects or temperature, solar radiation, rainfall, and saturated flow on fecal coliform numbers in sewage sludge-amended soils. To determine this, four 4.6 X 13.7 m field plots were each amended in summer and in winter with 800 liters of anaerobically-digested sewage sludge, and...
    Resource Type:
    Dissertation
    Full Text:
    . Christensen, H. D. Jenkins, and W. E. Sandine, for their patience. I thank the staff of the Corvallis

  • Effect of sucrose on the production of flavor compounds by yogurt culture bacteria

    Creator:
    Yang, Chang-su
    Abstract:
    Organoleptically, flavored yogurts appear to contain lower levels of acetaldehyde than plain yogurt. This study was undertaken to seek the reasons for this phenomenon by focusing on the analyses of acetaldehyde production by yogurt culture bacteria in yogurt base containing added sucrose and by performing other analyses such as the...
    Resource Type:
    Masters Thesis
    Full Text:
    encouragement extended to me by Drs. D. D. Bills, M. E. Morgan and W. E. Sandine and Mr. F

  • Nutrition and management of the beef unit for production of slaughter animals on range and improved pastures in southeastern Oregon

    Creator:
    Daugherty, Dennis A.
    Abstract:
    Studies were conducted over a two year period to evaluate alternative finishing methods for spring and fall-born beef cattle. Management alternatives from birth to slaughter included season of calving, lactating cow nutrition, preweaning calf nutrition, weaning age, calf and yearling winter nutrition, range and irrigated pasture supplementation, grazing practice, range...
    Resource Type:
    Dissertation
    Full Text:
    . Raleigh, D.C. Church, J.E. Oldfield, C.W. O'Conner and W.E. Sandine is great- fully acknowledged for the

  • A study of antimutagenicity in yogurt

    Creator:
    Sudarshan, Nadathur R.
    Abstract:
    The purpose of this study was to identify antimutagens in yogurt active against the experimental colon carcinogen, N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). Our initial experiments showed that acetone extracts of yogurt, or milk fermented by various lactic acid bacteria were antimutagenic against MNNG and 3,2'-dimethyl-4-aminobiphenyl (DMAB) in the Ames test (Salmonella typhimurium TA...
    Resource Type:
    Dissertation
    Full Text:
    antimutagens in yogurt active against the experimental colon carcinogen, iV-methyl-W-nitro-N-nitrosoguanidine