อัคคณัฐ ธีระนพวัฒน์. Inhibition of Orange Spots on Canned Bamboo Shoot. Master's Degree(Food Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library. : King Mongkut's University of Technology Thonburi, 2010.
Abstract:
Orange spot, a defect frequently found on the surface of canned bamboo shoot, is
reported to be the result of taxiphyllin degradation. To improve the export capability of
canned bamboo shoot, inhibition of orange spots is desired. 'This research was therefore
aimed to investigate the conditions that affect taxiphyllin decomposition resulting in an
inhibition of orange spots. Experiments were conducted to determine the heating time
required to reduce the initial taxiphyllin content of bamboo shoot to different levels
prior to being used as a raw material in canning. A control sample with no heat
pretreatment was also prepared. Both untreated and pretreated bamboo shoots were
canned using water as a packing medium; acid was added to obtain the desired final pH.
Two species of bamboo shoot, Pai-Wan and Pai-Ruak. were studied. The products were
kept at 2 storage temperatures, namely, 30 and 40 C; the former temperature represents
the commercial storage temperature, while the latter represents an accelerated condition.
The results obtained based on the analyzed residual taxiphyllin content, in the form of
HCN, demonstrated that the degradation of taxiphyllin due to heat pretreatment in
bamboo shoots followed the first-order reaction kinetics. In addition, it was found
during storage that the taxiphyllin content in canned bamboo shoots decreased, while
the taxiphyllin content in the packing medium increased. Nevertheless, no orange spots
were found on canned bamboo shoots stored at every condition after 6-month storage.