Chang-Giu Han’s scientific contributions

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Publications (3)


The Effects of Inositol Extracted from Rice on the Skin
  • Article

January 2001

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2,259 Reads

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2 Citations

Journal of the Society of Cosmetic Scientists of Korea

Choon-Koo Zhoh

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Hwan Song

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Chang-Giu Han

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Fumi Tsuno

Inositol, is a water-soluble crystalline compound. It helps with people’s metabolism and decreases cholesterol levels. It is also known to have anti-cancer results. In order to find out the affects of Inositol on the skin, Inositol skin lotion was produced with each amount of Inisitol: 0, 0.5, 1.0, 2.0, 3.0 wt% and tested on the faces and the arm areas of women in all ages for 7 weeks. The moisture, sebum, change in elasticity, and improvement of wrinkles were measured. Corneometer, Sebumeter, Cutometer, and an image analyzer were used as measuring equipments. There are subtle differences in the subjects when 1-2% of Inositol is used the moisture of the skin improved 19%, elasticity by 17%, and the amount of sebum for dry and oily skin types adjusted to the amount of sebum of the neutral skin types. This influenced the length, width, the number of peak, and the height of the wrinkles to improve 12.4%. It is thought that Inositol would be an effective new raw material in cosmetics.


The Improvement of Antimicrobial Inorganic Pigments for Cosmetics

January 1999

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11 Reads

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1 Citation

Journal of the Society of Cosmetic Scientists of Korea

Silver-containing antimicrobial inorganic pigments that have been developed so far still have problems, which result from silver's unique metallic color and discoloration. Therefore, those things are used only for make-up cosmetics or just the restricted amount is used. Although the use of white-base pigments or iron oxides has been considered to solve those problems, they virtually fail to serve as a perfect substitute. So it seems difficult to use enough quantity of those materials or to apply them to diverse kinds of products. The purpose of this study was, accordingly, to attain the complete removal of metallic color and the maintenance of color. Additionally, a rosemary extract was employed to develop a silver-containing inorganic antimicrobial pigment(Ag-AIP-R) that has an improved antimicrobial effect and anti oxidative effect.


Study of Antimicrobial Activity of New Zealand's Tea Tree Essential Oil, Grapefruit Seed Extract and its major Component.

January 1999

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28 Reads

Journal of the Society of Cosmetic Scientists of Korea

Manuka oil sometime named New Zealand's tea tree oil is soluble in oil and come from nature. The -pinene extracted from Manuka oil and R-limonene which is one of the component of extracted Citrex from Grapefruit were used to estimate the antimicrobial activity and to improve the capability of antiseptic. Disk diffusion and broth dilution methods were used to measure the antimicrobial activity. Escherichia coli which is gram-negative bacteria and Staphylococcus aureus which is gram-positive bacteria were used as strain. The antimicrobial activity of Manuka oil and -pinene for Escherichia coli, Staphylococcus aureus is similar when the concentration of Manuka oil and -pinene is . However, Antimicrobial activity of Manuka oil for Escherichia coli, Staphylococcus aureus is better than that of -pinene when the concentration of Manuka oil and -pinene is low. Antimicrobial activity of Citrex is superior to that of R-limonene. The proper ratio of Maunka oil and Citrex can improve the antimicrobial activity. The proper ratio obtained from studies was 75% of Maunka oil and 25% Citrex for Escherichia coli, 25% of Maunka oil and 75% Citrex for Staphylococcus aureus.