@article{oai:nagoya.repo.nii.ac.jp:00031597,
 author = {Toyama, Yoshiyuki and Yamada, Minoru and Takai, Hideko},
 issue = {1},
 journal = {Memoirs of the Faculty of Engineering, Nagoya University},
 month = {Sep},
 note = {In the preceding paper, the authors reported the characteristics of cuttle-fish oils which were prepared by rendering and produced chiefly in Hokkaido excepting a few samples produced in other districts. Last year, the authors procured several lots of cuttle-fish caught at the southern sea off the coast of Wakayama Prefecture. The livers of these cuttle-fish had a low oil content, and the oils were extracted with ether. The results of an examination of the ether-extraction oils revealed that they differ markedly from the rendered oils previously reported in their properties, the former showing very higher contents of unsaponifiable matter and lower saponification values. In Hokkaido, such cuttle-fish livers of low oil content as those described in this paper are generally obtainable from cuttle-fish caught before August, and are not used for the production of oil. It is probable that oil contained in cuttle-fish livers of low oil content has generally larger amounts of unsaponifiable matter than oil contained in cuttle-fish livers of such high oil content as can be used for rendering. On the other hand, it is also conceivable that properties of cuttle-fish oil are affected by the method of production. Thus, unsaponifiable matter may not be sufficiently liberated by rendering and hence a relatively large proportion of unsaponifiable matter may remain in the residue, while ether extracts uniformly unsaponifiable matter as well as saponifiable matter, yielding an oil which contains larger amounts of unsaponifiable matter than a rendered oil. In order to ascertain if such is the case, the authors procured several pairs of cuttle-fish oil and residue produced by rendering in Hokkaido. The residue was extracted with ether, and the extraction oil was obtained. A comparison of the extraction oils from residue with the corresponding rendered oils showed that the former contain larger amounts of unsaponifiable matter than the latter without exception. It may be concluded from these results that the dissimilarity in the properties of the rendered oils described in the previous paper and the ether-extraction oils from livers of low oil content described in this paper is not solely due to the variation in locality and season of cuttle-fish catching, but also due to some extents to the dissimilarity in the production method of oil. One sample of ether-extraction oil described in this paper contains 48.30% of unsaponifiable matter. For such abnormally high content of unsaponifiable matter, some other factors should be accountable. Since ether-extraction oil from the residue contains larger amounts of unsaponifiable matter than rendered oil, the former is a more suitable source of cholesterol which constitutes the major part of unsaponifiable matter.},
 pages = {110--113},
 title = {Ether-extraction oils from the cuttle-fish livers of low oil content and the residue of cuttle-fish oil rendering},
 volume = {5},
 year = {1953}
}