Effects of crab shell extract as a coagulant on the textural and sensorial properties of tofu (soybean curd)

To find an economic use of red snow crab (Chionoecetes japonicus) shell waste, we focused on its high mineral content. To evaluate its usability as a coagulant for tofu making, the effects of the crab shell extracts on the textural and sensorial properties of the tofu samples were investigated. The...

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Bibliographic Details
Published in:Food Science & Nutrition
Main Authors: JUN, Joon-Young, Jung, Min-Jeong, Jeong, In-Hak, Kim, Gwang-Woo, Sim, Jae-Man, Nam, Si-Youl, Kim, Byoung-Mok
Format: Article in Journal/Newspaper
Language:English
Published: 2019
Subjects:
tofu
coagulant
Chionoecetes japonicus
texture
sensorial acceptability
crab shell
calcium
Snow crab
Online Access:https://repository.publisso.de/resource/frl:6424001
https://doi.org/10.1002/fsn3.837
https://onlinelibrary.wiley.com/doi/suppl/10.1002/fsn3.837
Description
Summary:To find an economic use of red snow crab (Chionoecetes japonicus) shell waste, we focused on its high mineral content. To evaluate its usability as a coagulant for tofu making, the effects of the crab shell extracts on the textural and sensorial properties of the tofu samples were investigated. The crab shell powder (CSP) and ash (CSA) were used for their extract preparation, and 1%–5% acetic acid treatment led to an abundance of calcium in the resulting extracts. The tofu yields of all the acetic acid extracts were comparable with those of the commercial coagulants MgCl2 and glucono‐δ‐lactone (GDL). Furthermore, the results for the textural attributes and sensorial acceptability demonstrated that either the extract from CSP prepared with 3% acetic acid or the extracts from CSA prepared with 1% or 3% acetic acid could be used as coagulants, because all the values of the extracts were statistically equivalent to those of the MgCl2 and GDL (p < 0.05).

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