Search Constraints

Start Over
Filtering by: Creator Siriwoharn, Thanyaporn Remove constraint Creator: Siriwoharn, Thanyaporn

Search Results

  • 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:
    nutraceuticals and natural antioxidants. ©Copyright by Thanyaporn Siriwoharn December 12, 2001 All

  • Influence of cultivar and maturity on blackberry polyphenolics and investigation of sediment formation in blackberry juice

    Creator:
    Siriwoharn, Thanyaporn
    Abstract:
    The influence of cultivar and maturity on polyphenolic composition and antioxidant activity was investigated by UV-Visible spectrophotometry and analytical high performance liquid chromatography (HPLC) in commercially important blackberry cultivars and selections. The anthocyanin pigments changed tremendously with ripening. Total anthocyanins increased from 74.7-317 mg/100g fw from underripe to over ripe...
    Resource Type:
    Dissertation
    Full Text:
    Polyphenolics and Investigation of Sediment Formation in Blackberry Juice by Thanyaporn Siriwoharn A

  • 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:
    , Xialing Dong, Jung-Min Lee, Myriam Kucza, Keith Klesk, Arusa Chaovanalikit, Maria Widyasari, Thanyaporn