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- MUKAI Akira
- Food Research Division, Central Research Laboratories, Ajinomoto Co., inc.
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- YAMAMOTO Iwao
- Food Research Division, Central Research Laboratories, Ajinomoto Co., inc.
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- OTA Shizuyuki
- Food Research Division, Central Research Laboratories, Ajinomoto Co., inc.
Bibliographic Information
- Other Title
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- 揚物油の加熱による着色に関する研究 (第2報)
- アゲモノユ ノ カネツ ニ ヨル チャクショク ニ カンスル ケンキュウ 2 リノールサン メチル ノ カネツ ニ ヨル チャクショク ト ソノ キコウ ニ ツイテ
- Mechanism of Colour Development of Methyl Linoleate
- リノール酸メチルの加熱による着色とその機構について
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Abstract
The aim of this study was to elucidate the mechanism of colour development in frying oils. Methyl linoleate was selected as the typical model component of frying oil. The sample was heated for 8 hr at 200°C and the time dependence of chromaticity and characteristic changes were determined. The severer changes were observed in methyl linoleate than in soybean oil. The highly coloured sample was divided into five fractions by the urea adduct method, then above mentioned measurements were made for each fraction. In addition to the above mentioned analyses, the composition and mean molecular weight of the compounds which did not give the urea adduct were determined and the presence of cyclic structure was identified. As a result it was found that isolated cis double bonds isomerizecl to trans double bonds by heating, and simultaneously the cis-trans and trans-trans conjugation of the isolated double bonds followed. In the highly coloured fractions, isolated trans and Irans-trans conjugated double bonds were predominantly observed. Dimerization and timerization occured accompanying the formation of carbonyl, hydroxyl and epoxy groups. The coloured materials which were composed of partly cyclic dimers and trimers were concentrated in the fraction which slid not give the urea adduct. It was surely established that the polar dimer, which contained oxvgens, exhibited deeper red colour.
Journal
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- Journal of Japan Oil Chemists' Society
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Journal of Japan Oil Chemists' Society 15 (2), 58-64, 1966
Japan Oil Chemists' Society
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Details 詳細情報について
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- CRID
- 1390001205333716608
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- NII Article ID
- 130001009238
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- NII Book ID
- AN00245435
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- ISSN
- 0513398X
- 18842003
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- NDL BIB ID
- 8467222
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed