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DHARA is an online index of articles on Ayurveda published in research journals worldwide.
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Bioscience, biotechnology, and biochemistry
2010
;
(10)
:0
The effects of high hydrostatic pressure treatment on the flavor and color of grated ginger.
Yamaguchi K
,
Kato T
,
Noma S
,
Igura N
,
Shimoda M
Abstract
High hydrostatic pressure (HHP) was applied to grated ginger in order to inactivate quality-degrading enzymes in a non-thermal manner. The effects of HHP treatment on the flavor and the color of the grated ginger were investigated just after treatment and during storage. After HHP treatment (400 MPa, 5 min), geraniol dehydrogenase (GeDH) was inactivated to less than 5%, but the activity of polyphenol oxidase (PPO) was reduced only to 37%. Heat treatment (100 °C, 10 min) inactivated GeDH to 43% and PPO to about 10%. In storage, the reduction of geranial, neral, and citronellal to the corresponding alcohols was observed in the untreated and the heat-treated ginger, while it was not in the HHP-treated grated ginger. In the HHP-treated sample, terpene aldehydes almost disappeared without the formation of the corresponding alcohols. Browning was not observed immediately after HHP treatment, while it was complete in the heat-treated sample. The color change during storage appeared to reflect the residual activity of PPO.
DHARA ID:
D012758
Pubmed ID:
20944393
Access to Full Paper Not Available
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