The Sendan seeds were collected in Tosa province at winter, and were extracted with light petroleum ether. The yield of oil was 4.7% and it had following constants : d254 0.9265, n25D 1.4796, A.V. 8.3, S.V. 223.4 and I.V. 80.6. The oil was saponified with usual method, and mixed acid was obtained with 70.0% yield, which had following constants : d304 0.9369, n30D 1.4743, N.V. 213.6 and I.V. 96.4. Separation was made byPb salt-alcohol method into solid and liquid acids, which were esterified with methanol and hydrochloric acid, and were fractionated in vacuum. Each fraction was examined for its component, and by means of gas chromatography it was characterised for the presence of caprylic, capric, lauric, myristic, palmitic and stearic acid as saturated fatty acids, and oleic and linoleic acid as unsaturated acids.
It may be inferred that if oxidized lipids would form complexes with nucleoproteins of cells, the status of cell division might be probably changed and cancerous cells might be provoked. Then, the cancerous tissue should contain oxidized lipids. Experimental studies were planned according to this this point of view and trans-traps conjugated diene hydroperoxide was ascertained to find it in the lipids of cancerous tissues, such as gastric scirrhous carcinoma, gastric adenocarcinoma, rectal adenocarcinoma, and mammary carcinoma. In case of lung cancer whose generation is different from the generation of those cancers mentioned above in having a possible connection with free radicals contained in cigarette smoke, it may be inferred that the lipids of the tissue may change into oxidized lipids by oxidation catalyzed by the free radicals, oxidized lipids produce free radicals, which in turn produce oxidized lipids, and then the lung cancer may be generated. Then, the tissue of lung cancer should also contain oxidized lipids. Experimental studies revealed that trans-trans or cis-trans conjugated diene hydroperoxide existed in the lipids from the tissue of bronchial carcinoma, a kind of lung cancer, and from cancerous pleural fluids. Taking these studies of the author and other literatures into consideration, the author presented a hypothesis that “cancer is generated owing to oxidized lipids accumulated in a living body” (written as (A) in the following), and he demonstrated the hypothesis (A). The author discussed the reason why Japanese suffer more from gastric cancer and liver cancer than American or English from the difference of food habits and could proved that (A) explain this point. The author discussed the reason why Japanese suffer less from lung cancer than American or English from the difference of living circumstances and decided that (A) could also explain this point. Further the author attributed the inhibition of β-oxidation n cancerous tissue to be explicable, by (A). The author also proved that (A) could explain the decrease in catalase activity in cancer, generation of cancer by radiant rays, and production of cancer by arsenic. Thus the hypothesis (A) may be valuable to afford general understanding of cancer generation.
A number of catalytic reduction methods for the preparation of unsaturated higher alcohol have been reported, but the production on an industrial scale by any of these methods has not been succeeded as yet in Japan. The authors investigated the application of higher reduction pressure than the previously reported, aiming at effective reduction. As a results, a good yield (9095%) of unsaturated alcohol was obtained under the conditions of 300430 kg/sq·cm for the reaction pressure, 330°C for the reaction temperature, using 3%5% Zn-Al-O catalyst to raw methyl ester of rice bran oil. According to the previous reports, as yet, good results could be only obtained by the charge less than 10% of the autoclave volume. On the other hand, the use of hydrogen at high pressure allows to increase the yield of alcohol obtainable as compared with the case of lower pressure. This should have merits, in case of industrial production, such as increase in efficiency and minimizing the equipment. In addition, because of its high alcohol content, the reduction product can be immediately used as the raw material of surface active agents without processes for separation or refining. The authors, therefore, believe it is effective to apply the high pressure hydrogen (300430 atm) for the preparation of unsaturated alcohol.
By a unique method applying gas chromatography, the relative rate of sulfonation of linear dodecylbenzenes and n-hexylbenzene by 20% oleum has been determined at 18°C. The relative rate of linear dodecylbenzenes decreases as the position of aromatic nucleus is located toward the center of the alkylchain. The rate of 6-phenyl isomer is about 40% smaller than that of 1-phenyl isomer. And, the rate of n-hexylbenzene, having the half-length alkyl chain, is about 60% greater than that of -dodecylbenzene. It was shown that, also in the sulfonation of higher mono-alkylbenzene, there is still a pronounced selectivity owing to the steric hindrance of the alkyl chain. By digesting at 50°C, the above selective sulfonation was eliminated, and some new product with lower boiling point appeared.
In order to explain the phenomenon of wool shrinkage in detergent solution, the change of physical properties of single wool fibre was investigated and it was observed that the lubrication derived from sorption of detergent on wool surface seemed to be the main cause. It was recognized that the water solutions of the surface active agents having aromatic group in their molecule such as alkyl benzene sulfonate and butyl naphthalene sulfonate, increased the friction of fibre and then retarded its shrinkage. In the presence of fatty alcohol, wool shrinkage was accelerated by it's lubrication effect.