• Proceedings of the SCSK Conference
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• 2004.09a
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• pp.79-98
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• 2004

• 베이커리
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• no.8 s.421
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• pp.39-47
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• 2003

• 베이커리
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• no.4 s.429
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• pp.59-64
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• 2004

• Journal of the Korean Applied Science and Technology
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• v.38 no.5
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• pp.1265-1272
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• 2021

This study was intended to investigate the potential of Astragalus membranaceus ethanol extract(AM) and Astragalus membranaceus bioconversion extract(AMB) as functional cosmetic materials. To confirm the antioxidant effect, polyphenol and flavonoid contents were measured, and a study was conducted on skin cell toxicity and skin cell aging through cell experiments. As a result of the antioxidant experiment, the content of polyphenols and flavonoids increased in a concentration-dependent manner in the effects of polyphenols and flavonoids, and it was confirmed that the ethanol extracts were higher than the bioconversion extracts. It was confirmed that the AM and AMB increased the MMP1 expression inhibitory effect in a concentration-dependent manner in HDF cells. Therefore, this study is considered to be very useful as a functional cosmetic material in terms of antioxidant and skin aging prevention when using AM and AMB as functional cosmetic materials.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2012.03a
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• pp.98-98
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• 2012

최근 국내외에서 첨단 기능성 섬유에 대한 소비자들의 관심이 높아지면서 다양한 분야에서 기능성 소재들이 개발되고 있다. 특히 기능성 스포츠웨어 시장에서는 계절의 경계를 넘어 야외 활동 중에 사용할 수 있는 제품에 대한 요구가 증가되고 있는데, 날씨가 매우 덥고 햇살이 뜨거운 것에서부터, 얼음처럼 차갑고 추운 것까지 가지각색 인 경우가 있을 수 있다. 이러한 변화무쌍한 날씨에 쾌적한 활동을 하기 위해서는 외부 온도변화에 대응하여 몸을 보호하고 자연환경에 맞설 수 있는 의복의 필요성이 부각되고 있다. 본 연구에서 개발하고자 하는 지능형 체온조절 섬유는 정적상태에서는 보온성과 적외선을 방출을 통한 자가 발열기능을 부여하고, 동적상태에서는 태양열 증폭기능과 운동량에 따른 흡습발열의 기능을 통하여 자연환경과 의복환경의 변화에 대응할 수 있는 스포츠웨어 제품이다. 따라서 보온성이 우수한 PP, acrylate 원사 등을 이용하여 복합 방적사 설계 및 생산을 최적화였다. 또한 흡습발열 성능이 향상된 섬유구조체를 설계하여 개발 원사 구성에 따라 보온 발열 기능성 부여 방법을 달리하여 최적의 성능을 이끌어내는 제품을 개발하고자 하였다.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2015.11a
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• pp.266-266
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• 2015

전 세계적으로 무한한 청정에너지 개발에 대한 연구가 주목받고 있다. 그 중, 수소에너지는 화석연료의 고갈과 환경문제를 동시에 해결할 수 있는 자원이며 수소 생산 방법 중에서도 태양에너지를 이용한 수소 생산 기술은 가장 이상적인 수소 생산 시스템이라 할 수 있다. 대표적인 광전극 소재로는 $WO_3$, ZnO, $Fe_2O_3$, $BiVO_4$ 등과 같은 무기 소재가 주로 사용되고 있으며, 최근에는 Si, CIGS 등과 같은 태양전지와 상기 광전극을 집적하는 탄뎀형 소재/소자가 개발되고 있다. 광전반응이 우수한 전도성 고분자는 광전기화학 전지의 소재로 개발되고 있다. 그러나 유기물의 수중 불안전성 문제 때문에 직접적으로 물에 침전시키는 것이 아니라 외부의 인가 전원용으로 그 사용이 제한적이다. 본 연구에서는 유기계 소재의 direct energy conversion을 위한 효율 및 수중 안정성 향상을 위하여 Ni계 촉매 및 그래핀옥사이드가 융합된 유기기반 광전기화학전지를 개발하였다.

• Elastomers and Composites
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• v.44 no.2
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• pp.134-142
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• 2009

Organo bifunctional silane (TESPD) is added into silica containing NR and its effects are investigated with respect to the vulcanization properties, the processability, and the physical properties. The addition of the TESPD into silica filled NR compound increases the degree of crosslinking by formation of a strong 3-dimensional network structure with silica surface via coupling reaction, which results in an improved mechanical property. It also improves the processabilities compared to the Control compound.

• Journal of Convergence for Information Technology
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• v.8 no.5
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• pp.95-100
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• 2018

The metal oxide/graphene nanocomposites are promising functional materials for high capacitive electrode material of secondary batteries, and high sensitive material of high performance gas sensors. In this study, vanadium dioxide($VO_2$) nanostructrures were grown on CVD graphene which was synthesized on Cu foil by thermal CVD, and exfoliated graphene which was exfoliated from highly oriented pyrolytic graphite(HOPG) using a vapor transport method. As results, $VO_2$ nanostructures on CVD graphene were grown preferential growth on abundant functional groups of graphene grain boundaries. The functional groups are served to nucleation site of $VO_2$ nanostructures. On the other hand, 2D & 3D $VO_2$ nanostructures were grown on exfoliated graphene due to uniformly distributed functional groups on exfoliated graphene surface. The characteristics of morphology controlled growth of $VO_2$/graphene nanocomposites would be applied to fabrication process for high capacitive electrode materials of secondary batteries, and high sensitive materials of gas sensors.

• Food Science of Animal Resources
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• v.30 no.5
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• pp.703-716
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• 2010

It has recently been considered urgent to establish an accurate definition and scope of functional foods in the livestock industry in Korea. The tertiary function of food is gradually emphasized with various changes in conditions such as international competitive power enhancement of the whole world, including Korea. Therefore, the purpose of this study was carried out to gather basic information toward the establishment of standardization, management plans, and a system adapted to the Korean state through researching management systems of functional meat and meat products in the European Union (EU) and the Oceania Area (OA). A brief summary of this study is as follows. In the EU and OA, special management systems and laws about functional livestock and products were once nonexistent; only 'nutrition claims' and 'health claims' operated in the nutritional consolidation side of foods. Also, it was once thought that functional index materials and permissions established in the application of functional products sufficed, because management standards for enriched food were not established. Therefore, standardization of functional live stock products needs to be considered based on the case of developed countries in the EU and OA. It also seems that the above functional indicative substances can be applied, based on normal standards of indicative substances of functional products and the normal standards of indicators of functional substances added to livestock products presented in this study.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.30 no.3 s.47
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• pp.313-320
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• 2004

Human skin is continuously exposed to internal and external influences that may affect its condition and functioning. To maintain and improve skin condition, a wide variety of skin-care products is in the market. However, many of skin problems originate from internal causes, and the new insight into the relation between nutritional factors and skin is now receiving a great attention. Specific positive effects of nutrients or nutraceutical compounds on skin conditions may prove to be biologically relevant and may consequently allow for claims on products containing these compounds, resulting in the development of new functional food for optimal skin condition. In this review, these functions of nutrients and nutraceutical compounds in skin are summarized as providing a basis for the feasibility of the concept of functional foods for maintaining and improving skin condition.