The photo-dimerization reaction of methyl β-eleostearate was studied as a new method for the dimerization of unsaturated fatty acid methyl esters. When irradiated with light of high pressure mercury lamp, methyl β-eleostearate was observed to form dimer in solution in n-heptane. Examination of kinetic data obtained showed that the disappearance of the eleostearate is in nearest agreement with a first order reaction. It was therefore suggested that the photo-dimerization in n-heptane proceeds by the conversion of the eleostearate into its excited molecule by illumination with light. Furthermore, from the photo-dimerization experiment by monochromatic radiation, it was found that illumination with light of wave length about 274±30mμ of methyl β-eleostearate in n-heptane gives dimer.
In the present report, the low temperature flow characteristics of residual fuel oils by a Brookfield type rotary viscometer were studied and the following conclusions were obtained. (1) As the Brookfield type rotary viscometer can measure the viscosity of various liquids under varying rates of shear, it is very useful for estimation of flow characteristics of non-Newtonian residual fuel oils. (2) The increase in viscosity and non-Newtonian flow characteristic of residual fuel oils at low temperatures are caused by the wax contained in oils. (3) The pour point of residual fuel oil is one measure to estimated the low temperature fluidity but is not sufficient, it is therefore recommended to measure the low temperature viscosities of residual fuel oils by the Brookfield type rotary viscometer and to check the lowest temperature at which the residual fuel is used and also to determine the wax content in the residual fuel oils at -20°C.
Oxidation of dimeric isoprene anions prepared in situ from isoprene and lithium naphthalene gave various terpenic alcohols which contained 3, 7-dimethyl-1, 7-octadien-3-ol, 2, 7-dimethyl-2, 6-octadien-1-ol, nerol, geraniol, 2, 7-dimethyl-2, 6-octadien-1, 8-diol, 3, 7-dimethyl-2, 6-octadien-1, 8-diol and unidentified alcohols. Carboxylation of dimeric isoprene anions gave various monobasic and dibasic terpenic carboxylic acids.
The complex (HA) of sodium α-olefin sulfonate (AOS) and human serum alubmin (HSA) were prepared by mixing each component dissolved in water (AOS/HSA-1/2), dialysing the mixture over night against water and centrifuging off the precipitant. HSA used was previously purified with ethanol (Korner's method) and then with active carbon in acidic medium. The formation of HA was confirmed qualitatively by the measurements of mobility and color reaction. The complex containing 30mg of total protein was injected in rabbit by both subcutaneously and intravenously during the period of 21/2 months. According to thn ordinary precipititin reaction, authors found only 0 or 2' positive reactions in HA-anti HA system against 3' or 3 positive reactions in HSA-anti HSA system, and no reactions in AOS-anti HA and AOS-anti AOS systems respectively.
Studies of the adsorption of detergents (LAS and ABS) on skin, nail and hide powder in various pH, and the dermatological effect of LAS on human skin by immersion and patch-test were carried out. Higher detergent adsorption onto human skin was observed when treated in acidic detergent solution, which indicated there might exist some correlation between detergent adsorption and pH of the solution. Clinical test showed no dermatological side-effect on human skin due to detergent adsorption.
It is well known that the discoloration is observed on the worn cotton cloth after repetition of many wear and wash cycles. This phenomenon is called as yellowing of cotton. The present study was attempted to make clear the relationship between the degree of yellowing of soil components and the detergency efficiency. The color change and the detergency efficiency were measured by the reflectometer for the cotton cloths which were artificially soiled by various organic materials corresponding to the soil components in natural organic soils. It was found that the cloth soiled by squalene was most markedly colored and the cloths soiled by oleic acid and triolein followed in the coloration. The cloths soiled by unsaturated organic materials were significantly colored and hardly removed by washing. Further examinations in detail for squalene soiled cloth were performed. It was concluded that one of the most important reasons for yellowing of soiled cotton was the denaturation of squalene and other unsaturated organic compounds.
The adsorbability of surface active agents at oil-water interfaces and the influence of various norganic electrolyte on it were investigated by making electrocapillary curves. The oil phase was the solution of tetrabutylammonium chloride in methylisobutylketone, and the aqueous phase contained anionic, cationic or nonionic surface active agents in addition to the inorganic electrolyte. It was found that the interfacial tension decreased over the anodic or cathodic polarization range, depending upon whether the surface active agent was anionic or cationic. This decrease was strongly influenced by the kind and concentration of the electolyte in the aqueous phase. Linear relations held between the interfacial excess of the surface active agent and the cubic root of surface active agent concentration of the aqueous phase, as well as between the former and the cubic root of the ionic strength of the aqueous phase. These were in good agreement with Davies' equation derived theoretically. For alkylsulphate ions of various chain length, the free energy of desorption was calculated to be ca. 750 cal mol-1 for each -CH2- group.
The authors intended to investigate on the lipid compositions in the horny tissues of animals, as previously reported on the crystal lens of tunny (Thunnus thynnus orientalis), the scales of Kinmedai (Beryx splendeus Lows) and the tendon of Sardine-whale (Balaenoptera borealis Lesson). The present report deals an attempt on analyses of the lipid components of holstein's hoofs with regard to fatty acids, unsaponifiable matters. The hoofs were powderd with power saw and extracted with ether. The properties of ether extract and acetone soluble matters were showed in Table-1. The fatty acid compositions (%) analysed by means of gas chromatography were as follows; C10 : 0, 1.1; C12 : 0, 1.8; C14 : 0, 1.1; C16 : 0, 28.2; C10 : 1, 1.2; C12 : 1, 1.6; C14 : 1, 0.8; C14 : 2, 0.2; C16 : 1, 0.7; C16 : 2, 1.2; C18 : 1, 56.2; C20 : 1, 2.6; C20 : 2, 2.0. On the other hand, those calculated from spectrometric analysis were as follows; F0, 32.2; F1, 53.8; F2, 8.6 (conjtd. 5.6); F3, 4.0 (conjtd. 0.1); F4, 1.4; F5, 0.2; F6, 0.2. The crude unsaponifiable matter was yellowish solid containning white crystal, and the properties were as follows; IV, 53.6; mp, 56°C and the sterol content is 80.8% (precipitated by digitonin). The main sterol is a cholesterol containning a small quantity of a matter considered to be 3-ketocholesten (cholest-5-en-3-on). The remaining parts of the unsaponifiable matters seemed to be hydrocarbons.