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Volume 30 (1996)
- Issue 4 Pages 377-
- Issue 3 Pages 265-
- Issue 2 Pages 145-
- Issue 1 Pages 3-
Volume 30, Issue 3
Displaying 1-7 of 7 articles from this issue
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Ryoichi Kamide1996 Volume 30 Issue 3 Pages 265-272
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSUltraviolet ray is one of the strongest environmental factors which tremendously damages the structure and function of the skin. Acute cutaneous injury caused by UVirradiation includes sunburn and suntan. Chronic UV damage induces photoaging, such as solar lentigo, actinic elastosis, and benign and malignant tumors after a long latent period. The triggering events are direct DNA damage caused by UVB irradiation and the generation of reactive oxygen species initiated by UVA-induced excitation of natural photosensitizers located inside or outside of the cells. As the consequence, cutaneous inflammation, structural modification of the cell, mutation of genes, induction of cancers, inhibition of cutanecous immune reactions, and photosensitive disorders may occur. In this review, clinical symptoms and the mechanisms of harmful effect of UV irradiation, and a strategy to prevent such deleterious effects of UV are discussed.View full abstractDownload PDF (1945K) -
Sanae Kurokawa, Hiroshi Hayashi1996 Volume 30 Issue 3 Pages 286-292
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSIn order to develop thermo-sensitive powders, talc bearing poly (N-isopropylacrylamide) (P-NIPAM) or porous silica including N-isopropylacrylamide (NIPAM) gel, were prepared and then dispersion behaviors of the talc and water content of the silica were investigated. P-NIPAM shows a lower critical solution temperature (LCST) due tohydrophobic interaction about 33°C near skin surface temperature.
Talc bearing P-NIPAM was aggregated in water above LCST of P-NIPAM, though non-bearing talc was dispersed. Water content of silica including NIPAM gel was higher than that of parent silica below LCST. Such behaviors are attributable to hydrophilic-hydrophobic transition of the polymer fixed on talc surface or encapsulated in porous silica.
It is expected that these thermo-sensitive powders will be applied to development of new cosmetics which can control skin moisturization according to change of skin temperature.View full abstractDownload PDF (1752K) -
Hidetaka Iwai, Junichi Fukasawa, Masataka Fukuda, Ichiro Sugai, Hiroko ...1996 Volume 30 Issue 3 Pages 310-320
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe lamellar liquid crystalline gel (Lamellar Gel) which has the same structure as stratum corneum lipids was developed with synthesized lipids. We report its mechanism of constitution and skin care properties.
Lamellar Gel was formed by controlling the molecular behavior in two ways. One was making an optimal condition to increase the strength of hydrogen bond in hydrophibic region. The other was an addition of amphiphatic-molecules which have high affinity to incorporate a large amount of water within lamellar membrane.
Skin care properties of Lamellar Gel were compared to those of ordinary emulsion regarding in permeability, skin hydration and skin occlusion. Lamellar Gell was found to have higher affinity for skin, and hence higher permeability of the main components into the stratum corneum. Lamellar Gel supplied more water continuously because it contained more bound water. The skin is occluded by being covered with oil. Therefore, W/O emulsion and Lamellar Gel had high occlusion. Water content of stratum was enhanced by increasing both of these two parameters. It was clear that Lamellar Gel was the most suitable type of skin hydration.
Transepidermal water loss increases under dry environment. This condition influences the parts around the eyes, where the skin is very thin, and wrinkles are easily formed. Treating with Lameller Gel recovered these wrinkles promptly and hydrated stratum corneum for a long time.View full abstractDownload PDF (2847K) -
Kiyoshi Inoue, Yoko Iwakiri, Taturu Hatakeyama1996 Volume 30 Issue 3 Pages 321-329
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe classical method for evaluating the effectiveness of a permanent wave solution is usually based on a measurement of reduction capacity of disulfide bond or using Kirby method which determines waving performance. However, these methods measure indirect parameters of permanent waving process and dose not provide a direct information on the action of permanent wave solution during the perm process.
The purpose of this investigation was to study the rate of penetration of permanent wave solution into the hair shaft and its effects on wave formation. This was accomplished by first treating bleached white hair with iodime solution. When the iodine-treated white hair is used for perming, the reducing agent will remove the brown iodine color as the solution penetrates into the hair shaft. By observing the cross section of the hair with a microscope, it was possible to follow the perming process and determining the rate of solution penetration.
The investigation also covers the interrelationship between the penetration rate and formation of waves.View full abstractDownload PDF (2335K) -
Katsumasa Suzuki, Yoshihiro Saito, Tetsushiro Horiuchi, Yoshikazu Toku ...1996 Volume 30 Issue 3 Pages 330-335
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe effects of the temperature on the micelle and gel formation of poly (ethylene oxide)/poly (propylene oxide)/poly (ethylene oxide) triblock copolymer, pluronic F88, were investigated in terms of surface tension, differential scanning calorimetry, viscosity, stirrer bar stop method and fluorometricanalysis. The micelle and gel formation of F88 were greatly influenced by the F88 concentration and temperature. Furthermore, the micropolarity of the micelle and gel decreased with an increase in temperature.View full abstractDownload PDF (782K) -
Etsuko Nakamura, Masahito Hayashi, Masahiro Matsuoka, Tasuku Takamatsu1996 Volume 30 Issue 3 Pages 336-339
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSApplication of semi-micro HPLC which can reduce a solvent usage to approximately 1/10 in comparison with a conventional HPLC was studied for routine determination of active ingredients in quasi-drugs. Conditions established for the conventional HPLC was found to provide the same retention and separation when a linear velocity of carrier was kept constant. Reproducibility of a 2μl injection was excellent wish C.V.% of 1-2%. Analytical results of 6 active ingredients in hair grower by a complex gradient method were also found to be satisfactry.View full abstractDownload PDF (575K) -
Manami Kuruto, Kaoru Suganuma, Sachiko Okuda1996 Volume 30 Issue 3 Pages 340-344
Published: October 20, 1996
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe intensity of UV-B radiation corresponding to erythema action spectrum was measured at each outer position of the human body standing on the sand of the seaside beach in summer, and on the snow at skiing ground in winter, using a portable model of the UV-B radiometer designed to match its spectral response function to the erythma action spectrum. On the sand, the intensity at the headtop, shoulder and forehead was high in this order. on the other hand at the skiing ground, the forehead and breast received the higer level of the UV-B radiation compared to the headtop, and even at the cheek and chin some apreciable amount of the UV-B was detected, showing that the reflection of the UV-B was much higher on thesnow than on the beach sand. The UV-B intensity at the central Tokyo was nerely same as on the beach when measured in the same month, which suggest the necesity of good care against to the radiation even in the city. The results of the three hour sunlight irradiation experiment to the human skin both of the beach and at the skiing ground show that the skin portion with SPF 28 cosmetics had no visual color change, although a portion without any sunproof cosmetics got appearent sunburn. The skin color recovering speed from sunburn of each moniter was remarkably different from each other.View full abstractDownload PDF (1151K)
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