蒲鉾形成能を持つ乾燥魚肉を得させる為の“イオン性支柱”-I : 本着想の紹介並びに予備実験の成績
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Discussing a colloidal aspect of the collapse of Kamaboko-forming ability ordinarily unavoidable in drying the fish flesh, the following inference was achieved: Since the protein contents of muscular tissue are essentially made of large, polar and rigid particles of actomyosin, it is likely that, in drying the raw flesh, the free energy of the protein-water system is effectively kept low by the process of syneresis, namely, association of these particles. system is effectively kept low by the process of syneresis, namely, association of these particles. In rewetting the dried flesh, on the other hand, the protein-water system would little be lowered in free energy even if peptization were resulted in, effecting some increase of entropy. In order to prepare dried fish with Kamaboko-forming potence, therefore, it seems necessary to keep the actomyosin particles prevented by some appropriate means from their drawing too close to one another. From such a point of view, the author presented a new idea of “ionic braces”, so to speak, by the application of which he tried to obtain readily peptizable, Kamaboko-productive dried fish as follows: Raw flesh of fish previously cut into slices was infiltrated with one or another kind of polyfunctional strong electrolyte and dried up in open air at room temperature so that the actomyosin particles might become clamped together in their ionic sidechains and hence remain inhibited from becoming packed too close. The dried fish thus prepared was examined of its returnability in respect of Kamaboko-forming ability by actually-making the fish-jelly of it after the dissolution with NaOH followed by neutralization. Quite satisfactory results were obtained by applying to the flesh of flying-fish 0.1 N solution of any one of disodium ethylenediaminetetracetate, sodium oxalate, and sodium pyrophosphate, all being soluble salts of strong acid and used as anionic braces, while only negative results with hexa-methylenediamine hydrochloride which was expected to act as cationic ones, maybe on account of hard accessibility of the anionic side-chains to large cations applied. Weak electrolytes of double function thus far tested were found always of no use irrespective of whether they were acids, bases, or dipolar substances.