油化学
Online ISSN : 1884-2003
ISSN-L : 0513-398X
37 巻 , 5 号
選択された号の論文の7件中1~7を表示しています
  • 太田 静行
    1988 年 37 巻 5 号 p. 331-343
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
  • 神坂 泰, 菊次 英雄, 横地 俊弘, 中原 東郎, 鈴木 修
    1988 年 37 巻 5 号 p. 344-348
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
    脂質生産菌で, 特にγ-リノレン酸の生産に適した株であるMortierella ramanniana var. angulisporaの脂質組成に及ぼす, 培地中の金属イオンと温度の影響について調べた。菌体増殖に影響を及ぼさない範囲でZn2+濃度を上昇させると, 主に極性脂質において, リノール酸やγ-リノレン酸のような不飽和脂肪酸の含量が増加するのに対し, Fe2+濃度を上昇させると, 極性脂質よりも中性脂質のγ-リノレン酸含量が変化した。一方, 培養温度を低下させた場合も, 極性脂質のγ-リノレン酸含量が増加するのに対して, 中性脂質では, むしろ減少した。これらの結果から, この糸状菌において, 脂肪酸組成を調節する酵素系, 特にγ-リノレン酸の組成を調節する酵素系は, 極性脂質の場合と中性脂質の場合とで異なっていることが示唆された。
  • 山科 孝雄, 樋口 勝彦, 平田 博文
    1988 年 37 巻 5 号 p. 349-355
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
    The reactions of N-succinimidyl benzoates (1) with aliphatic primary amines (2) in acetonitrile or dioxane gave the corresponding N- (arylcarbonyl) amines (3). Reverse phase HPLC analysis of (3) was performed at 210300nm detection wavelengths using acetonitrile containing 070vol% of water as the mobile phase. Plots of log (corrected retention volume : V) vs. carbon number (CN) of alkyl group in (3) showed good linear relationship. The slope of the log V vs. CN plot increased with water content in the mobile phase. An interaction between the aryl group in (3) and the reverse phase appeared to occur in consideration of the result in which it was affected by water. The relative response of (3) at 254nm was found to be correlated linearly with the molar absorptivity of (3) at 254nm. The separation of labelled butylamines was also examined.
  • 青山 稔, 丸山 武紀, 兼松 弘, 新谷 〓, 塚本 正人, 東海林 茂, 松本 太郎
    1988 年 37 巻 5 号 p. 356-359
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
    The synergistic antioxidant effects of d-tocopherol (Toc) and several spicy compounds on lard and plam oil were investigated by oven and AOM tests. The antioxidant effects of spicy compounds were also studied in the same manner.
    1) By the oven test, cinnamaldehyde, capsaicine and thymol showed weak antioxidant effect on lard, but spicy compounds which enhanced the antioxidant effect of Toc were capsaicine, cineol, camphene, phellandrene and geraniol. However, no effect was observed on palm oil.
    2) By the AOM test, only capsaicine showed antioxidant effect on lard, but none of the spicy compounds enhanced this effect of Toc.
    3) Remnant ratios of the spicy compounds after a month of the oven test were lower than 30%, except in the case of capsicine which may possibly volatilize after such a period of time. However, the ratios of capsaicine and thymol which had antioxidant effects were higher than those of other compounds on lard. The remnant ratio of total Toc in lard increased by the addition of capsaicine, cineol, camphene, phellandrene or geraniol, indicating these compounds to possibly protect Toc from oxidative decomposition.
  • 徳田 一, 高野 敏
    1988 年 37 巻 5 号 p. 360-364
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
    An automated colorimetric method based on continuous flow analysis has been developed for determining free fatty acids in fats and oils and their derivatives.
    A 2-propanol solution of a sample was directly introduced into a Technicon Auto Analyzer. o-Nitrophenylhydrazine (ONPH) solution and N-ethyl-N'- [3- (N'', N'' methylamino) propyl] carbodi-imide (EDC) solution containing 5% pyridine were added to the sample solution, followed by heating at 60°C for 12min. The free fatty acids in the sample were converted the corresponding o-nitrophenylhydrazides. The solution was mixed with 1% KOH solution to decrease the absorbance of the reagent blank, followed by measurement at 550nm. The method provides a common molar response to a series of fatty acid from caprylic acid to oleic acid. The sample capacity of themethod is 2040 samples/h. Its reproducibility is within 1% relative and recovery, from of 97100%. It was successfully used for determining lipase activity and quantitating free fatty acids in various fatty acid derivatives.
  • 星野 誠
    1988 年 37 巻 5 号 p. 365-369
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
    Amino acid compositions and sulfur content of dry keratin hydrolysate and its fractions obtained by membrane ultrafiltration were determined.
    Remarkable differences were found in amino acid compositions and sulfur content between the fraction of molecular weight from 500 to 1, 000 and the other fractions.
    The ferrous salt FeSO4 (NH4) 2SO4·6H2O (Mohr's salt) or ferric solution of Fe2 (SO4) 3xH2O was added at the same concentration to an aqueous keratin hydrolysed solution and its fractions.
    The ultraviolet and visible absorption spectra of the hydrolysed protein solutions to which ferric solution had been added were the same as those to which the ferrous salt had been added, when concentrations of Fe (II) and Fe (III) were equal.
    From the above results for absorption spectra and change in the colors of Fe (III) added hydrolysed protein solutions into which 1, 10-phenanthroline solution had been introduced, it is apparent the mercapto group (-SH) containing keratin hydrolysed proteins has reducing activity and can reduce Fe (III) to Fe (II) in hydrolysed protein solutions. Also, the keratin hydrolysate and its fractions were shown to be connected to Fe (II) in a water-soluble chelate configulation in a pH range from 7.0 to 7.5, 25°C.
  • 渡辺 昭次, 藤田 力, 坂本 昌巳, 名取 至
    1988 年 37 巻 5 号 p. 370-371
    発行日: 1988/05/20
    公開日: 2009/11/10
    ジャーナル フリー
    3-ヒドロキシ-8 (9) -p-メンテン-8-カルボン酸 (2) をピリジンジクロメイトで酸化して3-オキソ-8 (9) -p-メンテン-8-カルボン酸 (3) を得た。 (3) を酢酸アンモニウムとシアノトリヒドロボレイトによる還元的アミノ化によって3-アミノ-8 (9) -p-メンテン-8-カルボン酸 (4) とし, (4) を活性アルミナで環化して新しい環状テルペン系アミド, 4-メチル-9-メチレン-7-アザビシクロ [4.3.0] ノナン-8-オン (5) を合成した。
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