Ho-Hsien Chen

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The enzymatic lipophilization of natural antioxidants is a process of enormous pharmaceutical interest; the direct esterification of such polar compounds, however, is a major challenge due to the heterogeneity of these reactions. In the present study, the Taguchi approach was employed to optimize the esterification of 5-CGA by immobilized Candida antarctica(More)
Dispersive liquid-liquid microextraction (DLLME) and dispersive micro-solid-phase extraction (DMSPE) are two simple and low-cost sample preparation methods for liquid samples. In this work, these two methods were applied to solid tissue sample for the determination of seven quinolones by high-performance liquid chromatography with diode-array detection(More)
UNLABELLED In this study, soft-shelled turtle (Pelodiscus sinensis) egg white (SSTEW) proteins were digested by thermolysin and the resulting small peptides were further fractionated by reverse phase chromatography. Peptides with angiotensin I-converting enzyme inhibitory (ACEI) activity from these fractions were screened. A lysozyme-derived peptide, IW-11,(More)
This research aimed to develop an electrolysis method to generate high-concentration chlorine dioxide (ClO2) for tilapia fillet disinfection. The designed generator produced up to 3500 ppm of ClO2 at up to 99% purity. Tilapia fillets were soaked in a 400 ppm ClO2 solution for 5, 10, and 25 min. Results show that total plate counts of tilapia, respectively,(More)
A salting-out assisted liquid extraction coupled with back-extraction by a water/acetonitrile/dichloromethane ternary component system combined with high-performance liquid chromatography with diode-array detection (HPLC-DAD) was developed for the extraction and determination of sulfonamides in solid tissue samples. After the homogenization of the swine(More)
Ho-Hsien Chen , Chao-Chin Chung , Han-Yan Wang 1 and Tzou-Chi Huang 1 1 + Department of Food Science, National Pingtung University of Science and Technology, Pingtung, Taiwan Abstract. Ginger (Zingiber officinalis, Roscoe), contains potent anti-inflammatory agents and oleoresin; consequently ginger oil has great anti-inflammatory effects. Supercritical(More)
The fermentation process in general is a kind of non-linear and time-variant system. It is necessary to determine optimal conditions in the fermentation process with multiple performance characteristics In this study, a Grey-based Taguchi Method was applied to find the optimal conditions of medium composition to enhance the production of biomass, monacolin(More)
A simple coprecipitation method was developed for the determination of tetracyclines (TCs) in surface water and milk by high-performance liquid chromatography with diode-array detection (HPLC-DAD). Magnesium ion was added into the surface water or the acetonitrile (MeCN) extract of milk. After alkalinization, magnesium hydroxide precipitates which had been(More)
A simple sugaring-out assisted liquid-liquid extraction method combined with high-performance liquid-chromatography with fluorescence detection (HPLC-FL) was developed for the extraction and determination of sulfonamides in honey. Sample preparation consisted of acid hydrolysis to release sugar-bound sulfonamides. After derivatization with fluorescamine,(More)
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