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Filtering by: Advisor Mandsager, Ronald E. Remove constraint Advisor: Mandsager, Ronald E. Subject Phenols Remove constraint Subject: Phenols

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  • Apple polyphenolics and their antioxidant properties : influence of cultivars, post-harvest storage, and 1-MCP treatment

    Creator:
    Widyasari, Maria Angela Artania
    Abstract:
    The distribution of total phenolics, antioxidant capacity, monomeric anthocyanin, and ascorbic acid contents in the peel and flesh of Red Delicious, Granny Smith, and Fuji apples during a six-month storage period were determined. In addition, the effect of 1-MCP (1-Methyl cyclopropene) on these parameters of the edible portion of apples...
    Resource Type:
    Masters Thesis
    Full Text:
    Storage and 1- MCP Treatment Abstract approved: Ronald E. Wrolstad The distribution of total

  • Characterization of phenolics in Marion and Evergreen blackberries

    Creator:
    Siriwoharn, Thanyaporn
    Abstract:
    Frozen Marion (Rubus sp. hyb) and Evergreen blackberries (Rubus laciniatus) (whole berries, berries without seeds, and seeds alone) were acetone/ chloroform extracted. Phenolics were isolated using C₁₈ cartridges and polyamide resins, then characterized and measured by reversed-phase HPLC/diode array spectral techniques. The Polyamide isolated fractions of Marion berries contained four...
    Resource Type:
    Masters Thesis
    Full Text:
    *" Ronald E. Wrolstad Frozen Marion (Rubus sp. hyb) and Evergreen blackberries (Rubus laciniatus) (whole

  • Influence of processing and storage on the phenolic composition of apple, pear and white grape juice

    Creator:
    Spanos, George A.
    Abstract:
    Methodology for characterization of the phenolic profile of apple, pear and grape juice was developed. It utilized High Performance Liquid Chromatography (HPLC) for separation of individual phenolic compounds and Diode Array Detection for recording the Ultra-violet (UV) spectrum of chromatographic peaks. The high resolution achieved and the ability of recording...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved — ..- .,—^ —.- Dr. Ronald E. Wrolstad Methodology for characterization of the phenolic

  • Pineapple juice : phenolic composition and enzymatic browning inhibition

    Creator:
    Wen, Ling
    Abstract:
    The phenolic profile of pineapple juice was analyzed by reverse-phase HPLC/Diode Array Detector, and 9 major peaks accounting for 70% of total peak area were characterized. None of these peaks are represented by the pineapple phenolics reported to be present by previous workers. Most of the major peaks are not...
    Resource Type:
    Dissertation
    Full Text:
    : Phenolic Composition and Enzymatic Browning Inhibition. Abstract approved: Ronald E. Wrolstad The