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13
腠腒 腜腐腞 腠腒 腜腐腤 腡腓腗腊腕腢腈腊腟 腚腌腙腑腍腅腏腋腣腘 腃腀 腇腖腈腊 腗腉腛 腓腏腈腎腌 腔腇腎 腅腐腍腃腑腒腄腊腆腂腋腉 ῌῌ ῌῌ Abstract 65 KOUCHI Fuculty of Bio Science and Ap- plied Chemistry, Hosei University, Kajinocho , Koganei-shi, Tokyo , Japan. Nozawa spa, Sulfur hot spring water, Skin Elasticity, ORP, Melanin, Cutaneous permeability, Aging of hot spring water J. Hot Spring Sci. In Nozawa spa area (Nagano Prefecture), ORP (Oxidation-Reduction Potential)-pH measurements were made on hot spring waters fresh out of wellheads (sulfur-containing sodium-calcium-sulfate springs, and sulfur springs) and hot spring waters at bathtubs of communal bathhouses, showing the favorable results that both the wellhead waters and bathhouse waters are reductive in terms of ORP-pH relationship. More specifically, just a slight di erence was found in ORP between these waters ; hence it can be appre- ciated that, at the communal bathhouses, reductive hot spring waters are almost as fresh as the wellhead waters. In skin ORP-pH measurements, it was observed that experimen- tal daily bathing in reductive hot spring waters over a period of two months brought about a decreasing tendency in ORP of the skins of the volunteer subjects. This signifies that habitual bathing in reductive water could suppress oxidation of the skin and lipid thereof. We also revealed that habitual bathing in Nozawa spa can improve or recover skin elasticity, and that the reductive sulfur spring water has an advantageous e ect of suppressing melanin formation causes blotches and freckles or pigmentary deposits at sunburn. The data obtained provide collaborative support for the generally accepted notion that sulfur spring water will make the skin lustrous. Further, as having been generally said that the beneficial e ects and e cacies of hot spring water are lost with its aging, the present work has confirmed that the aging of hot spring water results in nulli- fication of its beneficial e ect of suppressing melanin formation in the skin. Key wards : Shoichi O E ects of Nozawa Spa (Sulfur Hot Spring Water) with Reductive Characteristic on the Skin + + + + ,, . + ,, / ++ +2. 2/2. -1, -1, +2. 2/2. 0* 0/ 11 ,*+* +- # # # $ # #

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Abstract

65

KOUCHI

Fuculty of Bio Science and Ap-

plied Chemistry, Hosei University, Kajinocho , Koganei-shi, Tokyo , Japan.

Nozawa spa, Sulfur hot spring water, Skin Elasticity, ORP, Melanin, Cutaneous

permeability, Aging of hot spring water

J. Hot Spring Sci.

In Nozawa spa area (Nagano Prefecture), ORP (Oxidation-Reduction Potential)-pH

measurements were made on hot spring waters fresh out of wellheads (sulfur-containing

sodium-calcium-sulfate springs, and sulfur springs) and hot spring waters at bathtubs of

communal bathhouses, showing the favorable results that both the wellhead waters

and bathhouse waters are reductive in terms of ORP-pH relationship. More specifically,

just a slight di erence was found in ORP between these waters ; hence it can be appre-

ciated that, at the communal bathhouses, reductive hot spring waters are almost as fresh

as the wellhead waters. In skin ORP-pH measurements, it was observed that experimen-

tal daily bathing in reductive hot spring waters over a period of two months brought

about a decreasing tendency in ORP of the skins of the volunteer subjects. This signifies

that habitual bathing in reductive water could suppress oxidation of the skin and lipid

thereof.

We also revealed that habitual bathing in Nozawa spa can improve or recover skin

elasticity, and that the reductive sulfur spring water has an advantageous e ect of

suppressing melanin formation causes blotches and freckles or pigmentary deposits at

sunburn. The data obtained provide collaborative support for the generally accepted

notion that sulfur spring water will make the skin lustrous. Further, as having been

generally said that the beneficial e ects and e cacies of hot spring water are lost with its

aging, the present work has confirmed that the aging of hot spring water results in nulli-

fication of its beneficial e ect of suppressing melanin formation in the skin.

Key wards :

Shoichi O

E ects of Nozawa Spa (Sulfur Hot Spring Water)

with Reductive Characteristic on the Skin

+ +

+

+

,, . + ,, / ++

+2. 2/2. - 1 ,- 1 , +2. 2/2.

0* 0/ 11 ,*+*

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66

ORP-pH

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Fig. a Locations of wellheads and communal bathhouses in Nozawa spa area.

Fig. b Appearances of communal bathhouses in Nozawa spa area.

67

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a

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�Fig. ORP-pH relationships of hot spring waters fresh

out of wellheads and those at bathtubs of commu-

nal bathhouses.

68

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g kg

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Fig. ORP-pH relationships of skins on flexural sides

of forearms measured before and immediately after

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, : Before and after bathing in hot spring water

( : Kawarayu), respectively.

, :

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Fig. ORP-pH relationships of skins on flexural sides

of forearms measured in experimental daily bathing

over two months.

69

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Fig. Changes in viscoelastic modulus of skins on

backs of hands in experimental daily bathing.

70

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Fig. Changes in viscoelastic modulus of skins

on backs of hands classified by age bracket.

71

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Fig. Chromatic change of aqueous solution with time in melanin formation reaction.

72

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acid aqueous solution in melanin formation reaction.

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relationships

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75

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76

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: pp.

Aileem Tamura,

: ORP Oxi-

dation-Reduction Potential pH .

:

.

:

.

a : ORP

.

b :

.

:

ORP pH .

: ORP pH

.

Ohnami, S., Koumura, K., Ikeda, S. and Okouchi, S. ( ) : ORP (oxidation-reduction potential)

pH relationship between hot spring waters and human body fluids. Proceedings of the

th Conference of Societe Internationale des Techniques Hydrothermales (Beppu, Ohita,

Japan), .

Okouchi, S., Suzuki, M., Sugano, K., Kagamimori, S. and Ikeda, S. ( ) : Water desirable for

nm

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the human body in terms of oxidation-reduction potential (ORP) to pH relationship. J.

Food Sci., , .

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: Bio Indusutry, .

Shirota, S., Miyazaki, K., Aiyama, R., Ichioka, M. and Yokokura, T. ( ) : Tyrosinase Inhibi-

tors from Crude Drugs. Biol. Pharm. Bull., , .

: Fragrance J., No. .

: pp.

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