All issues
Volume 51 (2017)
- Issue 4 Pages 293-
- Issue 3 Pages 211-
- Issue 2 Pages 105-
- Issue 1 Pages 2-
Volume 51, Issue 3
Displaying 1-4 of 4 articles from this issue
- |<
- <
- 1
- >
- >|
Originals
-
Yuji Masuda, Eiichiro Yagi, Motoki Oguri, Tomohiro Kuwahara2017 Volume 51 Issue 3 Pages 211-218
Published: September 20, 2017
Released on J-STAGE: October 31, 2017
DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.5107/sccj.51.211JOURNAL FREE ACCESSSkin radiance is an important determinant of skin beauty that almost all women desire. However, the optical reflection characteristics that create the perception of skin radiance are not fully established. The skin properties associated with radiance have received little attention. The aim of this study is to examine the optical characteristics of skin radiance and its associations with other skin properties. We established a method for evaluating skin radiance by measuring the intensities of specular and diffuse reflection components and investigated their age dependence. The results indicated high levels of both specular and diffusion reflection in radiant skin. An age-dependent decrease and a slight increase of diffuse and specular reflection, respectively, were found in the group aged 60-79 years. We examined the number of ridges and surface roughness of corneocyte cells. High specular reflectance was associated with low numbers of the ridges and surface roughness values of corneocyte cells. Because well-conditioned skin shows high numbers of ridges, smoothing the corneocyte cell surface effectively enhances the specular skin reflection value.View full abstractDownload PDF (1825K) -
Koji Mizukoshi, Kenya Hirayama2017 Volume 51 Issue 3 Pages 219-229
Published: September 20, 2017
Released on J-STAGE: October 31, 2017
DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.5107/sccj.51.219JOURNAL FREE ACCESSMost age-related changes that appear on the surface of facial skin are caused by changes within the skin. Therefore, analyzing the internal state of the skin could make it possible to provide evidence-based counseling, which could offer benefits to customers. However, it is difficult to perform simple analyses of the inner condition of the skin, and conventional methods of analysis generally require costly laboratory equipment. Therefore, we used multiple regression analysis to create an estimation formula to calculate the skin's inner structure feature values based on skin surface feature values, which can be easily obtained. As objective variables, we used the number of dermal papillary structures and a score for dermal fibrous structure clearness. As explanatory variables, we used the feature values for sulci cutis and crista cutis characteristics, color characteristics, and frequency characteristics, as calculated from data including skin images. The concordance rate between corresponding before- and after-scores obtained with our novel estimation formula and the actual scores based on measured values for the number of dermal papilla structures was 100% and that for the clearness of dermal fibrous structures was 95%. These results demonstrate that skin surface feature values, which can be obtained using a simple device such as a microscope, can be used to estimate the condition of the inner structures of the skin, including the number of dermal papillary structures and the clearness of dermal fibrous structures.View full abstractDownload PDF (1217K) -
Tomomitsu Kawai, Takafumi Inoue, Takeshi Fujimori, Kouji Takehara, Aki ...2017 Volume 51 Issue 3 Pages 230-236
Published: September 20, 2017
Released on J-STAGE: October 31, 2017
DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.5107/sccj.51.230JOURNAL FREE ACCESSIn recent years, hair damage by sunlight and chemical treatment such as perming and bleaching has become a consumer concern. It is important to understand the effect of sunlight and chemical treatment on hair microstructure to develop the technology for protection and repair of hair. Our previous study demonstrated that a differential phase contrast scanning X-ray microscopy was a useful nondestructive analysis method to observe internal hair structure with high-resolution. In this study, hair samples with three different chemical treatment (normal, perming and bleaching) and additional irradiation by artificial sunlight were observed with a scanning X-ray microscopic tomography system using a synchrotron radiation light source in order to understand the damaging effect of both sunlight and chemical treatment on hair. The porosity rate in the cortex is higher in the permed hair than normal hair and void distribution in the cross section of permed hair is localized. The porosity rate in the cortex of permed hair is decreased by additional irradiation. The porosity rate of bleached hair is the same as that of normal hair and isn't changed by the irradiation. These results suggest that hair microstructural change in the cortex by sunlight is affected by the prior chemical treatments, and development of varied protection and repair technology depending on the prior treatment situation is needed.View full abstractDownload PDF (1224K)
Short Communications
-
Toshihiro Fujii, Misaki Imai, Kaori Hayashi, Yumiko Ito2017 Volume 51 Issue 3 Pages 237-245
Published: September 20, 2017
Released on J-STAGE: October 31, 2017
DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.5107/sccj.51.237JOURNAL FREE ACCESSThe dyeing and fading of semi-permanent hair colors were examined using transparent human hair keratin film. Among four kinds of commercial semi-permanent hair colors, the translucent keratin film was significantly dyed with three products. The coloring was dependent on dyeing time and increasing dyeing number, and the latter was important to gain deeper dyeing. When the film was dyed by two different products and analyzed by a spectrophotometer, spectra of the average absorbance were independent of the dyeing order. Compared with the dyeing of oxidative hair color products, no significant formation of cysteic acid was found in the films dyed with semi-permanent hair colors. When the dyed films were immersed in distilled water and tap water, the fading by tap water was faster than that by distilled water. The addition of EDTA to the tap water suppressed the color fading, whereas the addition of CaCl2 to distilled water caused the fading, indicating that metal ions will be closely related to the fading by water. The fading was also observed when the dyed films were exposed to artificial light (300-2500 nm) using a solar simulator. The fading was conveniently measured and the rate of change indicated the difference between the products. These results suggest that translucent keratin film will be useful to develop damage-free, anti-washout, and less-photofading hair color products.View full abstractDownload PDF (1491K)
- |<
- <
- 1
- >
- >|