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Volume 13 (1979)
- Issue 2 Pages 5-
- Issue 1 Pages 7-
Volume 13, Issue 1
Displaying 1-5 of 5 articles from this issue
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Osamu Kaneko, Kazuo Tate, Chiyomi Hanada, Muneo Tanaka1979 Volume 13 Issue 1 Pages 7-17
Published: September 25, 1979
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSSpectrophotomeric measurements on the colors of japanese women's skins ranging from 19 to 47 years of age were carried out by means of the Hitachi Color Analyzer Model 607.
The color of each subject's skin was measured after the removal of any make-up.
(1) The average colors of the skins (forehead, cheek and lower lip) in Munsell renotation system were 3.5 YR 6.0/3.8, 1.6 YR 6.3/3.9, 7.6 R 5.5/4.3, res pectively.
(2) A principal component analysis was made on the spectral reflectances of the skins; it was found that by the first three principal components, the variances of the spectral reflectances on the colors of the foreheads, the cheeks and the lower lips were explained at 98.1%, 97.2%, 98.0%, respectively.
(3) From the mean of the spectral refletances of the skins and their first three characteristic vectors, the spectral reflectance curves were reconstituted by the scalar multiples of the characteristic vectors as a function of correlated tristimulus values.
The figure of the reconstituted spectral reflectance curves was compared with the curve obtained by the practical measurement at the same tristimulus values.
They have shown good agreement.
(4) The spectral reflectance curves of the metameric colors on the skins, in which a corresponding tristimulus values are the same but the spectral compositions are different, were reconstituted by the liner combination of the first sixth characteristic vectors and the mean spectral reflectance.View full abstractDownload PDF (1365K) -
Teruo Horiuchi, Toshihiro Jin-no, Ichiro Kashiwa1979 Volume 13 Issue 1 Pages 25-28
Published: September 25, 1979
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe temperature-dependence of the H. L. B. number of plyoxyethylene cetyl alcohol ether (POECAE) was studied from the relative viscosity of its aqueous solution. The measuraments were done by Ubbelode-type viscometer at the temp erature range of 20-70°C, of which results were applied to Jones and Dole's equation. It was found that:
(1). The viscosity B-coefficient of POECAE was dependent on the temperature. It decreased with the increase of temperature. This seems to be due to the breakage of hydration shell.
(2). A good corelationship existed between viscosity-B-coefficient and H. L. B. value.
(3). Since the viscosity B-coefficient decreased with the increase of temperature, the hydrophobic properties increase and the H. L. B. value of POECAE changes to a lower value.View full abstractDownload PDF (495K) -
Masato Tagawa, Yujin Tabata, Noriaki Ohba1979 Volume 13 Issue 1 Pages 47-51
Published: September 25, 1979
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe effect of ethanol on the aqueous solution in which limonene was solubilized by nonionic surfactants, polyoxyethylene polyoxypropylene 2-decyltetradecylethers (PEN) and polxyethylene hydrogenated castor oil (HCO), has been studied. The oxyethylene chain length of these surfactants to achieve maximum solubilization at room temperature was affected by adding ethnol. The optimum oxyethylene chain length shifted to shorter chain length with increasing concentration of ethanol. The minimum amount of these suractants to give transparent solutions containing limonene in the range of 0 to 40°C was determined in the respective aqueous solutions. The P/S ratios were calculated from the amount of limonene (P) and the minimum amount of these surfactants (S). We have termed it the limited P/S ratios. The solubillizing power in aqueous solutions of these surfactants was evaluated from the limited P/S ratios. The limited P/S ratios in the case of PEN series increased with increasing concentration of ethanol, but in the case of HCO series those decreased until 2%, and then increased.View full abstractDownload PDF (598K) -
Hirotsugu Imahara, Ikuo Nishizaki, Hiromi Itoh1979 Volume 13 Issue 1 Pages 52-56
Published: September 25, 1979
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSPlacentaliquid has been graded by alkaline phosphatase activity. Other various components are contained in placenta and several biological activties have been reported. However, the relationship between the biological activities and the components has not been made clear yet.
Storaged Placentaliquid was tested for the preservation ability of the alkaline phosphatase activity. The alkaline phosphatase activity was assayed by the Reiner's method, a modification of the King-Armstrong method. The alkaline phosphatase activity of Placentaliquid was safety preserved at 0°C for 750 days, but the activity was almost declined at 30°C after 230 days.
Placentaliquid was tested for heat stability of the alkaline phosphase and tyrosinase inhibitory activities, Tyrosinase activity was assayed by colorimetric method, a modification of the Lerner's and Shima's method. As the results, 80% of the alkaline phosphatase activity decreased by at 60°C in 60 minutes, while 75% of the tyrosinase inhibitory activity was preserved at 60°C after 60 minutes.
It was considered that the heat inactivation of alkaline phosphatase was due to denaturation of the enzyme protein. On the other hand, the heat inactvation process of the tyrosinase inhibitory activity did not agree to that of the denaturation of the enzyme protein. So the activity of alkaline phosphatase was not closely related to the tyrosinase inhibitory activity. As the above results, it is hardly recognnized that the alkaline phosphatase activity is the most adequate indicator for the grading of Placentaliquid.View full abstractDownload PDF (642K) -
Hideyo Suzuki1979 Volume 13 Issue 1 Pages 57-61
Published: September 25, 1979
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSA reliable method for the extraction and determinatin of bergapten was established. When hydrophobic bergapten was treated with alkali, it became soluble in water through unfolding of its lactone ring. Hydrophobic substances were removed by washing with ether, then it was subjected to the closing reaction of lactone ring by heating with 10% sulfuric acid and the revival bergapten was extracted with chloroform. An aliquot of the solvent layer was injected into an FID gas chromatograph fitted with 5% SE-30 column and subjected to the determination by use of chrysene as an internal standard. A good linearity of calibration curve was obtained within 5-500μg/ml of bergapten, variation coefficient at 33.3μg/ml level being 4.6%. Recovery of 92.6% was obtained at the spike level of 100μg/g of bergapten into bergamot oil. The maximal bergapten content in seven commercial bergamot oils was as high as 1, 000ppm.View full abstractDownload PDF (714K)
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