スケトウダラ冷凍すり身のゲル形成能のｐＨ依存性と重合リン酸塩の影響

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  • pH-Dependency of gel forming ability of walleye pollack frozen surimi and effect of polyphosphate salt.
  • スケトウダラ レイトウ スリミ ノ ゲル ケイセイノウ ノ pH イゾンセイ ト ジュウゴウ リンサンエン ノ エイキョウ

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Frozen surimis from walleye pollack, which contained 8% sorbitol and 8% sorbitol plus either 0.2% sodium polyphosphate or 3.0% NaCl, were ground with 3% NaCl (final concentration) and also with 0-0.25% KCO to make the pH value between 6.8-8.7. The salt ground meat was preheated at 25°C for 8 h, and subsequently heated at 90°C for 30 m. The breaking strength (BS) and breaking strain (bs) of the heated gel were measured as a function of preheating time. The pH-dependence of the gel forming ability and the effect of polyphosphate salt on it were investigated from the time-dependent change in the measurements. The rate of increase in BS also with gel stiffness (Gs=BS/bs) was found to be the highest among the heated gels at around pH 7.5-7.8 when the frozen surimi with polyphosphate salt was applied, whereas the rate of increasing rate of BS and Gs of the heated gel from two lots of frozen surimi without polyphosphate salt was highest at around pH 7.6-8.5. These results indicated that the most profitable pH condition for the heat-induced formation of gel from frozen surimi varied between the lots with and without adding polyphosphate salt.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 69 (3), 405-413, 2003

    公益社団法人 日本水産学会

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