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Volume 16 (1982 - 198･･･
- Issue 2 Pages 93-
- Issue 1 Pages 3-
Volume 16, Issue 2
Displaying 1-6 of 6 articles from this issue
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[in Japanese]1983 Volume 16 Issue 2 Pages 93-98
Published: March 25, 1983
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSDownload PDF (1605K) -
Xanthene Coal-Tar DyesYoshio Ito, Hideyo Suzuki, Shunjiro Ogawa, Masahiro Iwaida1983 Volume 16 Issue 2 Pages 105-118
Published: March 25, 1983
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe contemporary impurity tests are not effective for the detection and determination of starting materials, uncombined intermediates of organic synthesis as well as subsidiary dyes contained in cosmetic coal-tar dyes.
A systematic detection and determination method of them in 14 kinds of xanthene dyes was established with the aid of HPLC. The following operation conditions were chosen; “Zorbax C-8” (reversed phase resin) column, gradient elution system of ammonium chloride (pH 8.0) solution and a mixture of methanol and acetonitrile (4:1) with UV detection system at the wavelength of 230nm.
By use of the proposed method actual survey was carried out on 39 commercial xanthene coaltar dyes for cosmetic use. More than 3 kinds of subsidiary dyes were found from all the samples. The amounts of starting materials and uncombined intermediates of organic synthesis contained in the samples were relatively low compared with those of subsidiary dyes.View full abstractDownload PDF (1705K) -
Junichi Koyama, Kiyoshi Kawasaki, Izumi Horii, Yasuhisa Nakayama, Yosh ...1983 Volume 16 Issue 2 Pages 119-124
Published: March 25, 1983
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSFor the purpose of clarifing the correlation between the skin surface conditions and the water solble components (that is free amino acids, pyroglutamic acid (PCA) and urocanic acid (UCA)) in the stratum corneum, the variation patterns in these components were studied in the hyperkeratotic stratum corneum of human skin produced by the topical application of 3% aqueous sodium dodecylbenzensulfonate.
The conversions of PCA, Cit, Ala and UCA markedly decreased by artifically induced hyperkeratosis.
Dry and flecky skin condition are often induced in normal subjects by low ambient temperature and humodity in winter season.
In this type of dry skin, there remained many nuclei in the stratum coreum and the variation patterns of the water solble components were the same as those in the artifically induced hyperatotic stratum corneum.
These results suggest that the dry skin in winter is accompanied with not only the changes of the skin surface but also the changes of the keratinizing process.View full abstractDownload PDF (1685K) -
Keisuke Tashiro, Akira Kojima, Yoshinori Okuda1983 Volume 16 Issue 2 Pages 125-135
Published: March 25, 1983
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThree analytical methods of oxidative dyes in hair dyes have been developed by High Performance Liquid Chromatography (HPLC).
The first method, paired ion chromatography, employs octadecylsilica (TSK GEL LS-410, 5μ) as column, and as eluent, methanol (25v/v%) and the solution (75v/v%) prepared by dissolving 0.01M sodium octanesulfonate (counter ion) to 0.025M phosphate buffer adjusted to pH 2.5 with 5% phosphoric acid. The second method employs the same column as 1st method and as eluent, methanol and 0.1M phosphate buffer (pH 5.0) (10:90v/v%).
The third method employs as column μ-Bondapak CN (10μ) coated cyanopropylsilane, and as eluent ethanol and pentane (30:70v/v%).
The methods are not only accurate and convenient, almost no clean-up, but provides remarkable determination of p-phenylenediamine, o-, m-, and p-aminophenol and so forth, and the average recovery rate exceeds 95% (coefficient of variance; 2.6% maximun). The application of the techniques to hair dye products on the market showed good qualitative results with detecting almost no obstacle substance.View full abstractDownload PDF (1159K) -
Influence of its components on skin hydrationShoji Nishiyama, Hideo Komatsu, Muneo Tanaka1983 Volume 16 Issue 2 Pages 136-143
Published: March 25, 1983
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSWe developed a device to evaluate the skin hydration effect of a cream. The hydration effect was evaluated by measuring occlusivity and water holding capacity of creams. These parameters were varied depending on the type of emulsion, the oil content and hygroscopicity of humectant etc. Occlusivity of oils changed depending on characteristics of oils such as their molecular structure and polarity. The addition of humectants to a cream changed these parameters; occlusivity was reduced and water holding capacity was increased. Futhermore occlusivity and water holding capacity of creams did not changed depending on oil content, but on humectant content.
We carried out a gravimetric test for hydration effect in which a diffusion cell with collagen membrane was used as a simulated model for the skin. As a result, water content of collagen membrane was enhanced by increasing the occlusivity and water holding capacity of a cream.
It was concluded that skin hydration was enhanced by increasing these parametersView full abstractDownload PDF (952K) -
Hiroyuki Mizuguchi, Mitsuyoshi Hagi, Kunio Ohara, Yukio Kawase1983 Volume 16 Issue 2 Pages 144-150
Published: March 25, 1983
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSAn application of isotachophoresis (IP) method to the determination of A (thioglycolic acid and dithiodiglycolic acid in permanent waving lotions) and B (cysteine and thioglycolic acid in permanent waving lotions) has been studied.
In IP method, the calibration curves were linear over wide concentration ranges of thioglycolic acid, dithiodiglycolic acid and cysteine, and the simultaneous analyses of thioglycolic acid and dithiodiglycolic acid could be done, and the simultaneous analyses of cysteine and thioglycolic acid could be done too.
Permanent waving lotions were analyzed by IP method. The results were compared with those obtained by the standard testing method for permanent waving lotion.
It is found the present IP method is very simple, rapid, safe, highly reproducible and simultaneously analytical, and can be satisfactorily applied to the analysis of permanent waving lotions.View full abstractDownload PDF (912K)
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