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Volume 42 (2008)
- Issue 4 Pages 285-
- Issue 3 Pages 185-
- Issue 2 Pages 81-
- Issue 1 Pages 2-
Volume 42, Issue 3
Displaying 1-5 of 5 articles from this issue
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Kyohei Joko, Yumi Yoshikatsu2008 Volume 42 Issue 3 Pages 185-200
Published: September 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSA number of papers have been published on the oxidation coupling reactions of the active intermediate of a dye precursor with an electron-rich dye coupler. At the present stage, however, little information is available about the oxidative reaction mechanism to colored oxidation products and the dye distribution inside the keratin fibers. From the results of dyeing in the presence of both reducing agent and chelate agent, we found that the coupling reaction developing oxidation dyes occurred on the outer surface in the cuticle cell phase, and that not only the cell membrane complex (CMC) regions play an important role as accumulation regions of the finished dye, but also the components of CMC contribute directly to the oxidation coupling reactions. Furthermore, we suggested from the other results that the metal ions and disulphide bond presented primarily within the intercellular materials play an important role in developing the colored oxidation dye. Then, on the basis of the general scheme of the oxidation dye process, we proposed a tentative mechanistic scheme of oxidative dyeing to account for the oxidation dying phenomenon of keratin fibers. The scheme is made up of four step-reactions.View full abstractDownload PDF (7008K) -
Ai Oba, Chihiro Sato, Kiyomi Takahashi, Mikayo Futagawa2008 Volume 42 Issue 3 Pages 201-217
Published: September 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe organs and tissues of the human body function together, and many women know that facial skin quality can be influenced by the condition of other areas. From the perspective of esthetics, the condition of other tissues and organs can have significant impact on facial skin. In our lives, increasing numbers of people experience pain and discomfort in the neck and shoulder region; this study investigates the effects of neck/shoulder pain and discomfort on facial beauty, and demonstrates that facial beauty can be improved by alleviating this pain and discomfort. Shoulder pain and discomfort are correlated to increased shoulder muscle stiffness, increased tension in the frontalis muscle (a muscle of facial expression in the forehead), and forehead wrinkling. We show that body massage aimed at alleviating muscle tension in the neck and upper back alleviate frontalis muscle tension and improve forehead wrinkles. Since other non-facial factors are likely to affect facial beauty, our results show that measures to make the face beautiful and healthy-looking involve the entire body.View full abstractDownload PDF (4284K) -
Takamasa Toyoda, Hirokazu Iyanagi, Kunihiko Mohri, Katsuhiko Nakamae2008 Volume 42 Issue 3 Pages 218-225
Published: September 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSWe investigated the use of Surface Free Energy (SFE) measurements, describing coherence between surfaces of two solids, in evaluation of affinity between skin surface and foundation, a possible predictor of makeup longevity. We found that the γp values of skin varied significantly among subjects. After discovering that the SFE values of most available conventional foundation products were very different from that of skin, specially formulated experimental foundations with SFE values close to that of the skin surface were prepared using conventional powder ingredients and novel powder ingredients coated with polyethylene glycol. In our usage tests, the SFE-controlled foundations demonstrated superior performance to that of conventional foundations and most of subjects preferred the SFE-controlled foundations. Examination with a digital microscope revealed that SFE-controlled foundations adhered evenly all over the skin surface, while conventional foundations tended to localize on the skin surface, offering support to the usage test result.View full abstractDownload PDF (2098K) -
Yu Baba, Hiroshi Kawamukai, Yoshiaki Matsui, Tadashi Igarashi, Fumihik ...2008 Volume 42 Issue 3 Pages 226-230
Published: September 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSAs a popular method for longwearing lipsticks, self-organizing polymers (e.g. glyceryl ether modified dimethicone (GE)), which can form a gel with a small amount of water are used. However, these polymers have the defect that they tend to inhibit the dispersibility of pigments, especially in a lipstick containing a large amount of liquid isoparaffin that has high moisturizing properties. In this study, the compatibility of the longwearing property and the high dispersibility of pigments in isoparaffin-rich lipstick has been investigated. The introduction of alkyl chain moieties to the GE structure markedly improved the pigment dispersibility. However, random copolymerization type structure inhibited the longwearing properties. On the other hand, the introduction of an alkyl chain to the both ends of GE did not affect the longwearing properties. For further improvement of the pigment dispersibility, fine silica particles were investigated as a dispersant. The compatibility of longwearing properties and good dispersibility of pigments was achieved with silica particles. TEM observation and 1H-NMR measurement revealed that GE was absorbed on silica particles and the silica formed a network in the lipstick composition. We assume that this organic-inorganic hybrid aggregate has no adverse effect on the properties of pigments in the lipstick, hence no flocculation of pigments occurs.View full abstractDownload PDF (2009K) -
Eiichiro Yagi, Kouichi Nakagawa, Kazutami Sakamoto2008 Volume 42 Issue 3 Pages 231-236
Published: September 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSElectron spin resonance (ESR) spectra have been used for studying stratum corneum (SC) lipid ordering. Order parameter S obtained from ESR spectra is a good index for evaluating the fluidity of SC lipids in vitro. However, the method for evaluation of ex vivo SC lipids has not been established. A glass plate using a cyanoacrylate resin was used to strip the SC lipids. A single-chain aliphatic spin probe, 5-Doxylstearic acid (5-DSA), was used. The SC samples were incubated in the 0.001% 5-DSA in a 0.1% ethanolic aqueous solution for 60min at 37°C. After the incubation, the excess spin probe was removed with distilled water, and then an ESR glass holder with the incubated SC sample was mounted in the ESR cavity. The newly designed ESR glass holder improved accuracy and reproducibility of sample preparations as well as ESR measurements. In conclusion, we have optimized the preparation method of ex vivo SC specimen and established accurate ex vivo ESR analyses of SC lipid ordering.View full abstractDownload PDF (1251K)
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