Catherina Y W Ang

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Experiments were conducted to determine the volatile compounds in cooked chicken meat using a static headspace gas chromatographic (GC) technique. Preheating conditions for samples in vials were tested at 70, 80, and 90 degrees C for 20-120 min at each temperature. The majority of the peaks increased in size as the temperature and time increased. Optimum(More)
Analytical methodologies with ultrasonic extraction and liquid chromatography (LC) were developed for the determination of phenolic compounds in dietary supplements containing Echinacea. The phenolic compounds determined by these methods included caftaric acid, chlorogenic acid, cynarin, echinacoside, and cichoric acid. Samples from tablets, capsules, and(More)
Pyridoxine.HCl, pyridoxal.HCl, and pyridoxamine.2HCl solutions were exposed to several laboratory light treatments, and the resulting vitamin retentions were determined by the AOAC microbiological method. The 5 treatments compared were total darkness, regular laboratory light, low actinic glass protection, yellow incandescent light, and golden fluorescent(More)
The purpose of this study was to determine whether 2-thiobarbituric acid (TBA) values could be used to predict microbiological spoilage of poultry meat. The TBA values of control and inoculated (cultured breast skin microflora, 10(5) cells/mL) chicken breast and leg meat were examined at 0, 2, 7, and 14 days storage in slightly adverse storage conditions (6(More)
Kava (Piper methysticum) extract products have been implicated in a number of severe hepatotoxicity cases. However, systematic toxicological studies regarding kava consumption have not been reported. In this study, 6 major kavalactones and different solvent fractions of kava roots, leaves, and stem peelings were evaluated for their mutagenic potential. None(More)
The content of selected water soluble vitamins, minerals, and cholesterol in two types of poultry bone residue was evaluated. Bone residue from skinless input materials contained slightly, although significantly, more calcium, phosphorus, and potassium than the bone residue from skin containing input materials. The former residue also contained slightly(More)
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