พีรวัส ใจวังโลก. Effects of Temperature and pH on Taxiphyllin Degradation in Bamboo Shoot. Master's Degree(Food Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library.. : King Mongkut's University of Technology Thonburi, 2009.
Effects of Temperature and pH on Taxiphyllin Degradation in Bamboo Shoot
Abstract:
Bamboo shoot contains a plant toxin called taxiphyllin, which breaks down to produce
toxic hydrogen cyanide. Although the amount of this compound can be reduced by
appropriate thermal processing, if bamboo shoot is nevertheless inadequately processed,
residual cyanide can promote heath problem to exposed consumers. This research was
thus aimed to investigate the effects of temperature and pH on degradation of
taxiphyllin in bamboo shoot. The study was divided into 2 parts. The first part was
concerned with the study of taxiphyllin distribution along the radial and vertical axes of
bamboo shoot so as to identify the proper part of bamboo shoot for subsequent
degradation kinetics study. The results obtained demonstrated that taxiphyllin was
uniformly distributed along the radial but not so along the vertical axis of bamboo
shoot; the apical part of bamboo shoot was found to contain the highest level of
taxiphyllin. The second part of the study was concerned with the investigation of
taxiphyllin degradation as affected by different heating temperatures, namely, 40, 60,
80, 100 C; at two levels of pH, namely, 2.4 and 7.5. It was observed that the
degradation rate of taxiphyllin increased as the pH decreased. The degradation at both
pH levels followed the first order reaction kinetics. The effect of temperature on the
kinetic constants could be described by the Arrhenius equation and the activation energy
values oftaxiphyllin degradation during heating were 46.09 and 48.82 kllmot at pH 2.4
and 7.5, respectively.