All issues
Volume 36 (2002)
- Issue 4 Pages 253-
- Issue 3 Pages 177-
- Issue 2 Pages 93-
- Issue 1 Pages 1-
Volume 36, Issue 2
Displaying 1-5 of 5 articles from this issue
- |<
- <
- 1
- >
- >|
-
Motoji Takahashi2002 Volume 36 Issue 2 Pages 93-101
Published: June 20, 2002
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSRecently there has been increasing concern about the properties and efficacy of cosmetics because the government regulation of the effects of cosmetic has been eased and the publicizing of the skin care effects of foundations or lipsticks has been officially permitted since April 2001. On the other hand, bioengineering techniques closely related to the substantiation of cosmetics have been well-developed and nowadays the internal structure of human skin and cutaneous cells can be studied non-invasively using these methods. In this paper I describe a few such techniques, which are in vivo measurement of the microtopography of human skin surface (texture and wrinkles), in vivo confocal lazer microscopy to study depigmentation, optical coherence tomography (OCT) for stratum corneum thickness and epidermal-dermal undulation measurement, and in vivo confocal Raman microspectroscopy for measurement of water distribution in stratum corneum. The possibility of application to efficacy testing of cosmetics is also mentioned.View full abstractDownload PDF (4336K) -
Sakiko Uchida, Keiichi Uehara, Masato Yoshioka2002 Volume 36 Issue 2 Pages 102-110
Published: June 20, 2002
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSPopularization of hair dyeing and the increase in the number of hair colors have required the development of accurate evaluation methods for dyed hair color. Although color evaluation has been generally carried out by sensory testing with the naked eye, the results have not been satisfactory because this method is not an objective evaluation. In order to develop an evaluation method for the color of dyed hair, we have adopted a color laser-microscope for the measurement of three primary color values. In our study, a correlation between the three primary color values and sensory testing with the naked eye was recognized, suggesting to us that this method by which three primary color values are measured is a useful tool for the evaluation of the color of dyed hair. Furthermore, when we studied the effect of decoloring and damage prevention on dyed hair caused by cleansing with anionic surfactants using the newly developed evaluation technique, we recognized obvious differences among the three anionic surfactants with regard to their decoloring and damage prevention effect. The result showed that treatment with sodium lauroyl hydrolyzed silk caused less decoloring and less hair damage on dyed hair.View full abstractDownload PDF (5244K) -
Hiroshi Tokunaga, Reiko Ko, Tadashi Uchino, Masanori Ando2002 Volume 36 Issue 2 Pages 111-118
Published: June 20, 2002
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSBithionol (BL) and dichlorophen (DF) are named in the Japanese Pharmaceutical Affairs Act as ingredients prohibited in cosmetics. So the methods for identifying BL and DF by HPLC were investigated. After adding BL or DF to lotion, milky lotion, body soap or shampoo and diluting with methanol, the extract was analyzed by HPLC using a Unisil Q C18 column (4.6mm i.d.×150mm), a mixture of acetonitrile and 50mM phosphate buffer (pH 3.5) (13:7) for BL or (1:1) for DF as the mobile phase and the detection wavelength of 306nm for BL and either 227nm or 286nm for DF, respectively. In the experiment curves for BL and for DF ranged from 1 to 10μg/mL and from 0.1 to 1.2 or 1 to 12μg/mL. There was good correlation between the concentration and the peak area of BL or DF. BL and DF added to lotion, milky lotion, body soap or shampoo-except for milky lotion D-were completely determined by HPLC. In the case of milky lotion D, an ingredient in that lotion interrupted the peak of DF on the HPLC chromatogram. So a pre-screening method with a short silica gel column was employed and the DF in milky lotion D was satisfactorily determined by HPLC.View full abstractDownload PDF (1123K) -
Yoshihiro Kojima, Kazunori Futamura, Shinobu Koda2002 Volume 36 Issue 2 Pages 119-122
Published: June 20, 2002
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSIt is not clear whether or not commercial ultrasonic wave devices including beauty care devices, toothbrushes, and washing machines, produce cavitation and sonochemical effects. In our work, the cavitation and sonochemical effects of a commercial ultrasonic wave beauty care device in water and in an aqueous solution of potassium iodide exposed to air were investigated. Nitric and nitrous ions were formed in distilled water under sonication, and their concentration increased with increasing sonication time. When ultrasound was irradiated into the aqueous solution of potassium iodide, the iodide ion was oxidized to a tri-iodide ion. This was due to the hydrogen peroxide produced in the solution under sonication. Our results indicated that sonication from ultrasonic wave beauty care device produces cavitation and sonochemical effects in water.View full abstractDownload PDF (2190K) -
2002 Volume 36 Issue 2 Pages e1-e2
Published: 2002
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSDownload PDF (115K)
- |<
- <
- 1
- >
- >|