Dissolved water in safflower oil affects the autoxidation of this oil significantly. Molecular sieves were used to remove the dissolved water from the oil. This method is much simpler than that of distillation, and dissolved water can be removed to the same extent as that by distillation. But, due to the elution of many kinds of trace metallic elements in the oil dehydrated with molecular sieves, these elements were analyzed by neutron activation analysis. For a data comparision trace amounts of metallic elements in the oil dehydrated by distillation were also analyzed. Since the intensity of the γ ray-photoelectric peak of nuclide 28Al was largest among the detected elements, this element was analyzed quantitatively and the other elements qualitatively. In safflower oil dehydrated with molecular sieves, 14 kinds of the elements (I, Br, Al, Mg, Si, V, Cl, Nd, Ta, Cr, Sb, Cs, Co, Na) were detected. Also, I, Br, Cl, Cr, Ta, Sb, and Al elements were detected in the oil dehydrated by distillation. The intensity of the photoelectric peak of nuclide except 28Al was essentially the same as that in the oil dehydrated by distillation, but the intensity of 28Al in the oil with molecular sieves was about 28 times stronger than that in distillation oil. In the molecular sieves, 19 impure elements in addition to the original constituents (Na, K, Al, Si, O) were detected. It was Al, Na, Si, Nd, Cs, and Co along with impure elements may possibly have been eluted in the oil. Al element in saffolwer oil dehydrated with molecular sieves was analyzed quantitatively. 0.91 ppm of Al was detected in safflower oil. The eluted amount of Al in safflower oil dehydrated by distillation was 0.032 ppm. A larger amount of Al element was thus eluted into the oil dehydrated with molecular sieves than by distillation.
Weight loss behaviors of straight-chain unsaturated fatty acids [8 kinds of monoenoic : cis- (c-) and trans-(t-) 9-hexadecenoic (C16 : 1), 9-octadecenoic (C18 : 1), 11-icosenoic (C20 : 1), and 13-docosenoic (C22 : 1) acids ; and all cis-11, 14-icosadienoic (C20 : 2), 8, 11, 14-icosatrienoic (C20 : 3), and 5, 8, 11, 14, 17-icosapentaenoic (C20 : 5) acids] and their characteristics were studied by thermogravimetry (TG), derivative thermogravimetry (DTG), and differential scanning calorimetry (DSC). 1) The TG curve for monoenoic acids in a nitrogen flow showed a simple weight loss pattern. In an air flow, the weight loss pattern in the temperature range from initial to 50% weight loss was essentially the same as that in the nitrogen flow. Following 50% weight loss, the pattern was more complicated than that in the nitrogen flow. The initial temperature of weight loss on TG and first peak on DTG curve in air and nitrogen shifted to the higher-temperature side with increase in carbon number. 2) On the TG curve for polyunsaturated fatty acids in the air flow, a weight gain due to oxidation was observed at 120 °C. It was significant, indicating that oxidative sensitivity could be calculated as the rate of weight gain. The weight loss pattern after initiation became more slowly with increase in the numbers of double bonds. On the TG curve in the nitrogen flow, the rate of weight loss with rise in temperature after 50% weight loss decreased with increase in the numbers of double bonds. 3) Volatile and residual substances at 25% weight loss of unsaturated fatty acids were analyzed by gas chromatography (GLC). In the nitrogen flow, the proportion of original fatty acid in the volatile and residual substances was above 57%. The proportion of original fatty acid in the air flow clearly decreased with increase in unsaturation. Icosapentaenoic acid in the volatile substances was about 18%, while none could be detectected in the residual substances.
The solution behavior in water of a binary system consisting of monoglyceryl ether (GE) and diglyceryl ether (DGE-OMe) was studied by observing their ternary phase diagrams. Both GE and DGE-OMe are surfactants with less solubility in water, and form lyotropic liquid crystals even when present at low concentrations. A reversed hexagonal liquid crystal formed in the ternary system (φ=0.2) was found thermodynamically more stable than that in the GE/water system (φ=-0.2). X-ray measurements along with the results of an ESR spectroscopic study on the structures of reversed liquid crystals indicated these thermodynamic changes in liquid crystals to be due to the structural changes such as d-spacings caused by the interaction of the hydrophilic portions of the mixed two surfactants.
A study was made of the reactions of 1-methoxy cyclohexyl hydroperoxide (PO) with styrene derivatives under redox reaction conditions. In the case of. styrene, dimethyl 8, 9-diphenylhexadecanedioate (4 a) was obtained as the main product. With 2-phenylpropene, methyl-8-methoxy-8-phenyl nonanoate (9b) was obtained.
A new technique using thermobalance for the quantitative analysis of lipids was conducted on the following mixed samples :  stearic acid (SA) and tristearoylglycerol (TSG);  TSG and trilinoleoylglycerol (TLEG);  SA, dimer acid (DA), and TSG, ;  1-monostearoylglycerol (1-MSG), 1, 3-distearoylglycerol (1, 3-DSG), and TSG ;  SA, 1-MSG, 1, 3-DSG and TSG. For mixed samples of , , , and , good separatability was attained under each condition. However, for mixed samples of  SA could be separated, but DA and TSG were not successfully separated because of molecular weight distribution of DA and interactions between DA and TSG. From the experimental results, vacuum thermogravimetric analysis was concluded adequate for the quantitative determinating of lipids.