10日間絶食区また35日間無脂肪食区のコイは, 対照区のものと肝すい臓アセチルCoAカルボキシラーゼ (ACC) 比活性においてほぼ同一水準を示した。無脂肪食に5%脂肪酸を添加しても, コイ肝すい臓ACCの比活性は低下しなかった。35日間無脂肪食投与区は肝, すい臓脂肪酸合成酵素 (FAS) の比活性を増大し, 無脂肪食に5%脂肪酸添加した区は同比活性を低下した。インシュリンあるいはアロキサン注射はコイ肝すい臓ACC及びFASの比活性に影響がみられなかった。水生動物からのACCはクエン酸とMg²+をまたFASはNADPHを活性化のために要求し, 基本的にはほ乳動物と同じ要求性を示した。コイ肝すい臓でACCの比活性は45pmol/min/mgタンパク質であり, FASのそれは421pmol/min/mgタンパク質であり, ほ乳動物のそれらに比べてかなり低い。他7種の水生動物については全動物体からそれら粗酵素を調製したが, コイ肝すい臓の約1/10の比活性を示したに過ぎない。したがって, 魚を含めた水生動物の脂質合成はより劣っているように思われる。

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数種の液体及び固体脂肪酸メチルエステルのトリクロロメタン及びベンゼンに対する無限希釈溶解熱を, 高精確度溶解熱熱量計を用いて, 298.15Kにおいて測定した。ベンゼンを溶媒とした場合には, すべてのエステルは吸熱を伴って溶解したが, トリクロロメタン溶媒の場合には, 固体エステルは吸熱的に, 液体エステルは発熱して溶解した。
測定値の確度を見るために, 各溶媒に対して (CH₂) ₂基当たりの溶解熱の増分を調べたところ, ほぼ一定の値が得られた。この増分は, 液体パルミチン酸メチルについても等しくなる。
パルミチン酸メチルの融解熱を, 固体及び液体の溶解熱から求めたが, この値は, 本研究室において断熱熱量計で測った値に一致する。
溶解熱及び溶媒和熱の (CH₂) ₂当たりの増分をn-アルカンのそれらと比較して論じた。
付録として, 断熱熱量計による融解熱測定法を概説した。

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W/O/W型エマルション油膜の破壊の原因となる電解質類存在下で, 安定な試料を調製するための諸条件を検討した。タンパク質の保護コロイドとしての効果や, 極性脂質の油膜補強効果を調べた結果, リゾチーム, オクタデシルアミン, オレイン酸等に油膜の破壊速度を減少させる作用が見られたが, 油膜を安定化させる役割は認められない。一方, 転相により自然にW/O/W型分散が生成する現象を利用し, 電解質類存在下で試料の調製を試みた結果, 親水性親油性両乳化剤の適当な量比を各電解質に合わせて検索すれば, 電解質濃度が比較的低い範囲で安定な系が得られる可能性が, 油膜の持続性の観測結果から示唆された。

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A rapid and highly specific method for the determination of cis-vaccenic acid content in plant lipids by mass chromatography has been developed.
Two calibration curves were obtained from the mass chromatography of several standard mixtures containing known amounts of dimethyl disulfide adduct (DMDSA) of methyl cis-vaccenate and DMDSA of methyl oleate. The content of cis-vaccenic acid in standard mixtures was proportional to the values calculated from the peak areas of characteristic ions due to the fragmentation of DMDSA of these esters.
A mixture of fatty acid methyl esters prepared from plant total lipids was subjected to a reaction with dimethyl disulfide in the presence of I₂ as the catalyst for 30min. After removal of contaminating by-products from the reaction products by thin-layer chromatography, the purified DMDSA fraction of methyl monoenoates was introduced into a gas chromatograph-mass spectrometer.
This method has been found applicable to the determination of cis-vaccenic acid content in naturally-occurring lipids, such as chlorella, parsley seed, soybean, and maturing Mallotus japonicus seed lipids.

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The antiredeposition of oily soil by Zeolite has been studied under various aqueous conditions, sodium dodecyl sulfate, sodium silicate, sodium carbonate, sodium carboxymethyl cellulose, sodium sulfate and a synthetic detergent. Oleic acid and oleyl alcohol were used as model substances of oily soil. The reflectivity of cotton cloth to which the oily soil adhered was identical with the original, in spite of the addition of Zeolite. In the case of nylon cloth, reflectivity increased with the amount of Zeolite added. That is, the amount of oily soil adhering to the nylon cloth surface decreased with the amount of Zeolite. Thus, in the case of nylon, the antiredeposition of oily soil was concluded due to the Zeolite.

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The adsorption equilibria of benzene derivatives (phenol, benzoic acid, nitrobenzene, and aniline), 1-hexanol, 1-butanol, 1-heptanoic acid, and valeric acid on carbon black in aqueous solutions were studied. The carbon black used as the adsorbent was Electronic Conductive Carbon Black (Lion Akzo Co.) treated with nitric acid (B) or hydrogen (C). The surface acidity of carbon black B was large, but that of carbon black C, small. The adsorption isotherms were in good agreement with the Freundlich-type isotherm. The amounts of organic compounds adsorbed increased with decreasing solubility in water. The amount of phenol adsorbed was very large and its solubility, large. To investigate the influence of the ionization of phenol, the amounts of phenol, benzoic acid, and aniline adsorbed on modified carbon blacks were measured for their solutions varying widely in pH. The amounts of phenol and benzoic acid adsorbed on carbon black C decreased with increasing pH, but the amount of aniline adsorbed onto it decreased with decreasing pH. Thus, the amount of phenol, benzoic acid, and aniline adsorbed decrease with an increase in the amount of adsorbate ionized. The pKa value of phenol was larger than those of other organic compounds. Consequently, it is thought that phenol is adsorbed specifically owing to its large pKa. The adsorption character of an organic compound can be predicted on the basis of its solubility and pKa.

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The hardness of a mixture prepared from a heat-dissolved solution of a wax and oil for cosmetics varied with the properties of the oil used. These properties were thus examined so as to clarify the mechanism for variation in hardness.
The hardness of solid paraffin-oil mixture was found to be closely related to the solubility (g/100g solution) of solid paraffin in the oil used. That is, a solid paraffin-oil mixture comprising the oil with a lower solubility of solid paraffin gave rise to a higher degree of hardness. For a carnauba wax-oil mixture, the same relationship between hardness and solubility as that of the solid paraffin-oil mixture was found. Consequently, in the preparation of mixtures of a wax and various oils, their hardness can be predicted on the basis of the solubility of wax in the oils, which in turn can be estimated from the solubility parameters of the wax and the oil, as well as from the oil molecular weights.

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