• Journal of the Korean Applied Science and Technology
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• v.33 no.1
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• pp.186-194
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• 2016

Consumption of fruits and vegetables has been conducted to be effective in the prevention of chronic diseases. In this study, 70% methanol, 70% ethanol and chloroform-methanol mixture (CM, 2:1, v/v) were used as solvents in the extraction of apple peels. The total phenol content, total flavonoid content and antioxidant activity of various extracts were investigated using in vitro assays. The extract obtained by 70% methanol showed the highest total phenol content ($20.87{\pm}0.17mgCAE/g$), ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt] radical scavenging activity and ferric reducing antioxidant power. However, 70% ethanol extract possessed the strongest antioxidant activity assayed by DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity and ${\beta}$-carotene bleaching method. And CM extract was found to show the highest total flavonoid content with the value of $9.26{\pm}0.06mgQE/g$. These results indicated that apple peels can be used in dietary applications with a potential to reduce oxidative stress.

• Journal of the Korea Furniture Society
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• v.22 no.1
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• pp.63-71
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• 2011

Hanji has known for its high qualities for more than thousand years. Hanji is stronger, and has better durability, air permeability, flexibility, thermal insulation, soundproofs and UV absorbability. Therefore, developing industrial interior finishing materials using Hanji is replaced with the PVC (Poly-Vinyl Chloride) materials instead, it will be a new environment-friendly material and positively represents Korean brand marketing. The industrial inter-construction material is discomposed by heat or light because of material characteristics. As a result, it emits a lot of noxious substances. Hanji is essentially a neutral paper since it does not rely on any acidic chemicals of artificial bleaching methods. Hanji is also known as the living paper because of its close relation to nature. Therefore, I would like to suggest that Hanji made from alternative material as a chicken fiber. It will be a non-polluting interior finishing materials by making use of Hanji to a taste of Korean culture in the green industry around the world. Rather than PVC used commonly in construction material, kitchen and office furniture, interior materials in the subway, trains, or other vessels, credit cards, and ID cards, I created an interior construction material by using patented Hanji. This will be increased the value of usefulness in the environment-friendly green industry instead of PVC.