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        검색결과 62

        21.
        1991.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 철근콘크리트 뼈대구조물의 실제적인 단부경계조건을 고려한 철근콘크리트 기둥에 대한 인접부재의 강성을 비선형거동과 부합시켜 해석하고, 인접부재의 단부구속효과를 고려한 중심축하중을 받는 장주의 극한강도를 해석하고저 해석모델을 정립하여 보-기둥의 2차강성매트릭스 해석법에 의하여 이론적으로 해석하는데 있다.
        4,300원
        22.
        2019.09 KCI 등재 서비스 종료(열람 제한)
        최근 홈네트워크 시스템은 대단위 공동주택에서 거의 기본으로 제공되어 초기 스마트홈을 구현하고 있으며, 시스템과 사용자간 접점에 있는 대표적인 기기가 월패드(Wall-pad)와 생활정보기 등이다. 생활정보기는 월패드와 연동되어 일괄 소등, 가스 차단, 엘리베이터 호출 등 외출 시 현관에서 제어할 수 있는 기능을 제공하는 일종의 IoT 기기라 할 수 있다. 본 연구는 홈네트워크 기기 전문회사가 의뢰한 생활정보기 디자인 산학연 과제 수행에 있어 인터랙션 디자인 방법론의 효용성과 교육적 성과를 고찰했다. 기업은 시장에서 차별화 될 수 있는 독창적인 디자인과 적정 수준의 양산 가능성을 요구하였고, 이를 위해 Norman의 인터랙션 디자인 이론을 적용하여 통합 PUI를 구현했다. 교육적인 측면에서는 시각 디자인(Visual Communciation Design)을 전공하고자하는 학생과 제품 디자인(Product Design) 전공을 희망하는 학생 2인 1조의 팀을 구성하여 제품/UI 디자인을 함께 수행하도록 하고 다양한 전문가와 협업을 통해 다학제적(Multi-disciplinary) 접근을 경험하여 새로운 시각에서 결과물을 도출할 수 있도록 유도했다. 생활 정보기의 시장 도입 초기에 산학연을 통해 디자인 연구를 진행하여 새로운 제품 유형에 대한 디자인 프로세스를 검증해 볼 수 있었던 점과 기존 기업에서 별도의 팀과 전문가에 의해 수행되는 제품 디자인과 UI 디자인을 통합적 접근을 시도했던 점에서 본 연구의 의의가 있다고 할 수 있다.
        23.
        2019.03 KCI 등재 서비스 종료(열람 제한)
        현재 한류는 다양한 분야와 새로운 성장산업으로 변화를 맞이하고 있다. 따라서 본 연구의 목적은 새로운 문화콘텐츠가 필요한 시대에 대응하여 잠재적가치가 높은 K-Beauty사업과 한류의 상징인 K-Pop을 활용하여 심층 한류팬을 위한 제품을 개발이다. 본 연구의 방법 및 내용으로는 첫째, 문헌조사를 통해 한류 콘텐츠 현황과 K-Beauty사업 중 향기제품시장의 발 전가능성을 분석하고 심층 한류팬을 위한 제품에 대해 조사를 하였다. 둘째, 문헌 조사를 통해 디자인 기획에서는 디자인 방향 및 목적, 디자인 개발 내용을 설정하였다. 마지막으로 3D 시뮬레이션, 전문가 평가를 통해 최종 디자인을 개발하였다. 본 연구의 내용과 결론은 다음과 같다. 첫째, 한류 콘텐츠에 대한 관심과 소비가 증가하고 있으므로 이를 더욱 강화할 수 있는 지속적인 콘텐츠가 필요하였다. 둘째, 급성장중인 K-Beauty사업과 K-Pop시장을 융합하여 새로운 경쟁력 있는 브랜 드를 구축하기 위해 한류스타의 심층 한류팬을 위한 제품 디자인의 방향 및 목표를 제시하였다. 셋째, 한류스타와 팬이 교감할 수 있는 응원봉 제품개발을 통해 새로운 문화적 경험을 체험할 수 있고 한류 문화의 다양성을 제공하고자 하였다. 본 연구는 콘텐츠간의 융합을 통하여 새로운 산업의 경쟁력을 높이고 한류문화의 다양성을 경험 할 수 있는 제품개발의 사례가 될 수 있으리라 본다.
        24.
        2019.03 KCI 등재 서비스 종료(열람 제한)
        본 연구는 운전자가 자율주행자동차로부터 신뢰감을 형성할 수 있는 인터페이스 디자인 구성요소의 추출에 그 목적이 있 다. 또한 추출된 디자인 구성요소의 지각이 밀레니엄 세대와 뉴 실버 세대 간의 차이를 평가하였다. 자율주행자동차의 신뢰 감을 2차 구성개념으로 정의하여 심성모형과 전문가/전문지식, 공통목적, 교육, 의인화, 피드백, 인과관계 정보, 그리고 에러 정보를 포함하는 8개의 1차 구성개념을 추출하였다. 이해타당도를 평가하기 위하여 설문조사 데이터(N=548)에 대한 확인적 요인분석을 수행하였다. 평가결과, 심성모형과 전문지식, 공통목적, 의인화, 피드백, 인과관계/에러 정보를 포함하는 6개의 1차 구성개념은 2차 구성개념인 신뢰감을 설명할 수 있는 것으로 조사되었다. 다중집단분석 결과, 뉴 실버세대에게는 의인화와 인과관계/에러정보가 밀레니엄 세대와 비교하여 신뢰감 형성에 보다 큰 기여를 하는 것으로 평가되었다. 이와는 반면에, 밀레니엄 세대에게는 심성모형과 전문지식, 공통목적, 그리고 피드백이 신뢰감 형성에 보다 높은 영향을 미치는 것으로 나타났다.
        25.
        2018.10 서비스 종료(열람 제한)
        Background : Osteoclasts are differentiated from the monocytes/macrophages of hematopoietic cells, that excessive activities of bone-resorbing giant cells leads to pathological bone diseases such as osteoporosis (contained rheumatoid arthritis and autoimmune arthritis). Therefore, it is very important to suppress loss of bone mass by deactivation of osteoclast differentiation. In this context, we evaluated for the effects of black ginseng (BG) extract on TRAP activity, proliferation and differentiation in RANKL-induced osteoclastic RAW264.7 cells. Methods and Results : The aim of this study is to figure out the potential anti-osteoporosis effects and the underlying mechanism of BG extract in RANKL-induced osteoclastic RAW264.7 cells. The ginsenoside Rg3, Rg5, Rk1 and Rh4 content of BG was increased more than Red ginseng (RG). The extracts of BG markedly reduced the activity of tartrate-resistant acid phosphatase-positive (TRAP+) multinucleated cells from osteoclastic RAW264.7 cells, without cytotoxicity. BG clearly inhibited RANKL-induced osteoclast differentiation by decreased calcitonin and TRAP (p < 0.01). Furthermore, ginseonside Rg5 and Rk1 significantly inhibited TRAP activity in formation of osteoclastic differentiation (p < 0.01). It is also found that Ginseonside Rg5 and Rk1 mixture more inhibits osteoclast differentiation activity. Conclusion : Our results suggest that Black ginseng extract has an anti-osteoporosis effects in bone disease when administered as a food supplement and has potential as a therapeutic agent for osteoporosis.
        26.
        2018.10 서비스 종료(열람 제한)
        Background : The human patch test is a method used to evaluate potential skin irritation after contact with a cosmetic materials. Pectin lyase-modified red ginseng extract (GS-E3D) is a newly developed ginsenoside Rd-enriched ginseng extract. This study was designed to investigate the skin safety of GS-E3D in human patch test. Methods and Results : Thirty two female volunteers were tested with GS-E3D. GS-E3D (20 ㎕) was applied to occlusive patch test devices and was then applied onto the back of subject with normal skin for 24 hours. Cutaneous irritation responses were evaluated and graded according to criterion of International Contact Dermatitis Research Group (ICDRG) at 30 min, 24 hours, and 48 hours after removing of GS-E3D patch. The average age of subjects was 47.3 ± 9.3 years. Skin reactivity calculated from irritation score in GS-E3D treated group was 0.51 and skin irritation score of no application group was 0, respectively. Skin irritancy was no response in both GS-E3D treated group and no application group. From above data, GS-E3D was identified as a non-irritant according to ICDRG guideline that skin irritation score of ‘0.00 - 0.75’ is a non-irritant. Conclusion : These results indicate that GS-E3D can be useful as a safe cometic ingredient.
        27.
        2018.10 서비스 종료(열람 제한)
        Background : Pectin lyase-modified red ginseng extract (GS-E3D) is a newly developed ginsenoside Rd-enriched ginseng extract. This study was designed to investigate the acute oral and dermal toxicity of GS-E3D in rat. Methods and Results : The acute oral toxic effects of GS-E3D in female SD rats were examined at dosages of 300 ㎎/㎏ and 2,000 ㎎/㎏. In acute dermal toxicity study, 500, 1,000 and 2,000 ㎎/㎏ of GS-E3D were applied onto the shaved skin of male and female SD rats. The weights of rats were recorded at 0, 1, 3, 7, and 14 days and clinical observation were checked once a day for a period of 14 days. All rats were scarified on 14th day and complete gross examination was conducted to detect any gross change of organs after necropsy. GS-E3D did not produce orally or dermally treatment-related clinical signs of toxicity or mortality in all rats during the 14-day observation period. The oral and dermal LD50 values of GS-E3D were over 2,000 ㎎/㎏ in rat. The oral and dermal administration of GS-E3D revealed no significant change in body weight and gross pathology examination compared to control group. Conclusion : These results indicate that GS-E3D can be used as a food and cosmetic materials without critically adverse effect.
        28.
        2018.05 서비스 종료(열람 제한)
        Background : Non-alcoholic fatty liver disease (NAFLD) is caused by obesity, type 2 diabetes mellitus, dyslipidemia, and genetic factors. Also, hyperinsulinemia directly promotes fat accumulation in hepatocytes. Therefore, it is very important to suppress the most common risks of NAFLD, such as obesity and insulin resistance. In this context, we evaluated for the effects of black ginseng (BG) extract on lipid accumulation inhibition and degradation in hepatocytes. Methods and Results : The aim of this study is to figure out the potential anti-lipogenic effects and the underlying mechanism of BG extract in a cellular-, type 2 diabetes mellitus (T2DM) animal model associated with NAFLD. T2DM animal used C57BL/KsJ db/db mouse (M. 6 wk, n = 56), treated with extract of BG and Red ginseng (RG) (each 100 and 900 ㎎/ ㎏/day, p.o) for 6 weeks. BG markedly reduced palmitate-induced intracellular lipid accumulation in HepG2 cells. On histology of liver tissues of T2DM animal, macrovesicular lipid droplets in cytoplasm of hepatocytes were decreased both RG and BG-treated groups. In liver tissue, BG-treated groups suppressed CCAAT/enhancer binding protein-α (C/EBP-α), sterol regulatory element-binding protein-1c (SREBP-1c) expression, and SREBP-1c mediated induction of acetyl-CoA carboxylase (ACC) and fatty acid synthase (FAS) proteins related to the induction of adipose differentiation. Futhermore, adenosine monophosphate (AMP)-activated protein kinase (AMPK) activity was significantly increased in BG-treated groups compared to RG-treated groups. It is also found that peroxisome proliferator-activated receptor-α (PPAR-α) highly expressed in BG-treated groups. Conclusion : Our results suggest that black ginseng extract has an anti-adipogenic and anti-lipogenic effects in the liver when administered as a food supplement and has potential as a therapeutic agent for obesity and T2DM induced NAFLD.
        29.
        2018.02 KCI 등재 서비스 종료(열람 제한)
        The historical exchanges between the Republic of Korea and Japan have broadly occurred, in terms of both political and cultural aspects, from ancient to modern times. Regarding ancient gardening culture, in particular, Asuka developed gardens with the gardening techniques passed down by the Baekje people. The development of the basic form of a garden pond along with its characteristics, established through such exchanges, is suggested by investigating its components through analysis of data from the gardens of Baekje and Asuka. In terms of the garden pond structure, homogeneity was confirmed between Baekje and Asuka, with a linear rectangular form as the basic design. In addition, the vertical construction technique was used by both ancient kingdoms. In terms of the types of stone used in building the shore of the garden pond, Baekje used diverse types such as natural stone, crushed stone, and cut stone. In contrast, rounded river stone was used by Asuka. Regarding the floor of the garden pond, Baekje used soil, which enabled the planting of lotus flowers. In contrast, Asuka used stones to pave pond floors, which made the growth of plants impossible. In terms of layout, Baekje used ornamental stones for pond landscaping, while Asuka used manmade island and water intake facilities in their pond construction. The effects of Baekje’s garden culture on Asuka's garden building can be seen from its influence on the form of the garden pond and shore construction style. In terms of the construction of the garden pond's shore with the same stones and the stone flooring, the garden ponds of the Asuka Kingdom reveal technically unified and refined aspects.
        30.
        2017.11 서비스 종료(열람 제한)
        우리나라 폐기물관리법(구폐기물관리법)에서는1997년 재활용 규정을 제정한 이후, 사업장일반폐기물 중 석탄재, 점토점결주물사, 광재 및 무기성오니 등은 성토재 등으로 재활용할 수 있도록 해왔다. 그러나 해당 폐기물에는 아연, 납, 불소 등의 성분이 현행 토양오염 우려기준을 초과하는 경우가 있어, 과거 적법한 절차를 거쳐 폐기물을 재활용하였더라도 토양환경보전법에 따라 부지정화를 시행하는 사례가 종종 보고된다. 과거 폐기물을 성토재 등으로 재활용한 지역의 부지정화를 시행하는 경우, 토양과 폐기물은 최대한 분리/선별한 후에 각각 토양환경보전법과 폐기물관리법에 따라 처리하는 것이 원칙이다. 또한, 토양정화 비용과 폐기물처리 비용이 차이를 고려할 때, 경제적인 측면에서도 토양과 폐기물을 분리하는 것이 매우 중요하다. 하지만, 앞서 언급한 석탄재 등의 폐기물은 육안상 토양과 구별이 어렵고, 물리적 성상(입도 및 밀도) 또한 토양과 유사하기 때문에 일반적인 방법으로는 선별이 불가능한 문제가 있다. 본 논문에서는 TPH, 아연, 비소 등이 1지역 토양오염우려기준을 초과하는 폐기물 재활용지역을 대상으로 XRF분석을 실시하였고, 조사결과를 토대로 오염토양과 폐기물에 대한 분류기준 수립하고 ‘토양환경보전법’과 ‘폐기물관리법’의 적용여부를 판단하는 자료로 활용하고자 하였다. XRF를 이용하여 측정한 주요 성분을 ternary diagram (SiO2, CaO/MgO, Al2O3/Fe2O3/기타)을 이용하여 비교하였으며, 오염토사와 폐기물은 성분비에 따라 구별이 가능함을 확인하였다. 토양오염도 조사결과 폐기물시료의 TPH, 아연, 비소의 농도는 토양에 비해 3~4배 정도 높게 측정되어, 폐기물을 분리/선별하는 것만으로도 토양오염도를 상당 부분 낮출 수 있을 것으로 기대된다.
        31.
        2017.11 서비스 종료(열람 제한)
        우리나라의 메탄가스 배출량은 2014년 기준 26.6백만톤 CO2eq 수준으로, 이중 약 27% (7.3 백만톤 CO2eq)는 폐기물매립지에서 유출되고 있다. 매립지에서의 메탄유출을 저감하는 가장 이상적인 방법은 매립가스를 포집하여 에너지화하는 “매립가스 자원화” 방식이다. 그러나, 이를 위해서는 가스포집시설, 가스정제시설 및 발전설비 등의 설비투자가 필요하며, 매립가스 발생량이 2~3 N㎥/min (메탄가스 농도 35%~50%)이상의 대규모 매립지에서만 경제성 확보가 가능하다고 알려져 있다. 이런 이유로 230개소의 매립지 중 17개 시설에서만 매립가스 자원화 시설을 운영하고 있으며, 대부분의 중소규모 매립지에서는 메탄유출에 대한 별다른 대책이 없는 실정이다. 본 연구에서는 중소규모의 매립지 5개소를 선정하여 “공기주입을 통한 호기성 매립지 전환” 및 “매립지복토층을 이용한 생물학적 메탄산화 기술”의 메탄저감 성능과 경제성을 검토하였고 “매립가스 자원화”와 비교하였다. 매립가스 자원화를 검토하기 위한 매립가스 발생량은 LandGem 모델을 이용하여 산정하였으며, 폐기물의 성상(메탄잠재발생량 및 메탄발생속도추정)및 매립량은 환경부 통계자료를 이용하였다. 공기주입에 따른 호기성전환 비율은 주입압에 따른 유효반경을 산정하여 추정하였으며, 복토층에서의 메탄산화 효율은 문헌조사를 통해 결정하였다. 기술검토 결과 공기주입과 복토층 메탄산화기술을 조합하는 경우 70~85% 수준까지 메탄유출을 저감할 수 있는 것으로 추정되었으며, 중소규모 매립지의 경우 매립가스 자원화와 비교하여 상대적으로 우수한 경제성을 나타냈다.
        32.
        2017.04 KCI 등재 서비스 종료(열람 제한)
        Bisphenol A (BPA), a known endocrine disruptor, induces toxicity in cells and in experimental animals. Ginseng extracts were evaluated to determine whether they can inhibit BPA-induced toxicity. The antioxidant activity of fresh ginseng extract (WGE), dried white ginseng extract (DGE), and dried red ginseng extract (RGE) was measured using the DPPH assay. WGE and RGE increased DPPH free radical scavenging activity. Cell viability was measured in HepG2 cells following treatment with BPA and ginseng extracts using the MTT assay. DGE and RGE increased HepG2 cell viability following treatment with 200 μM BPA. RGE reduced levels of biochemical markers of liver damage, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) that increased in mice following treatment with BPA. In addition, the regeneration and proliferation of damaged liver cells were significantly increased in RGE-treated mice. Moreover, RGE inhibited hepatic fibrosis in the surrounding area and in the central vein of the liver microstructure. RGE also significantly inhibited BPA-induced cytotoxicity. In addition, RGE protected liver damage and regenerated liver tissues in BPA-treated animals. These results show that RGE may represent a potential candidate drug for the treatment and prevention of liver damage caused by environmental toxins.
        33.
        2017.02 KCI 등재 서비스 종료(열람 제한)
        Background: Ganoderma lucidum cultured on hulled barley was investigated as a potential natural source of antioxidants and antiinflammatory agents. Methods and Results: The yields from Ganoderma lucidum cultured on hulled barley water and ethanol extract were 17.69% and 25.77%, respectively. The antioxidant activity of Ganoderma lucidum cultured on hulled barley extracts was confirmed by various methods including assayss of 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2-azino-bis-(3-ethylbenzo thiazoline-6-sulfonic acid) (ABTS), nitrite radical scavenging, and Fe3+ to Fe2+ reducing power activity. The ethanol extract of Ganoderma lucidum cultured on hulled barley showed improved DPPH, ABTS and nitrite radical scavenging activity compared with the water extract. After treatment of RAW264.7 cells with Ganoderma lucidum cultured on hulled barley ethanol extracts, the cell viability compared with the control was 92.82%, even at a concentration of 3,000 ㎍/㎖. The ethanol extract inhibited reactive oxygen species (ROS) generation in RAW264.7 cells stimulated with H2O2, even at low concentrations. In addition, the ethanol extract showed an inhibitory effects on the production of lipopolysaccharide-induced nitric oxide (NO) in RAW264.7 cells. Conclusions: This study suggests that the extract of Ganoderma lucidum cultured on hulled barley is a potential source of natural antioxidants and anti-inflammatory agents.
        34.
        2016.10 서비스 종료(열람 제한)
        Background : Lactuca sativa (LS) is a member of lactuca genus and the Asteraceae family. To its usual purpose as an edible leafy vegetable, lettuce has had a number of uses in ancient times as a medicinal herb. Depending on the variety, lettuce is an excellent source vitamin K and vitanin A. Methods and Results : The objective of this study is to find out the antioxidant and oxidative DNA damage prevention capacity of LS for both water and ethanol extract. The total phenolic and flavonoid contents have been estimated in this study. The extracts have been tested to assess the 1, 1-diphenyl-2-picryl-hydrazyl (DPPH), 2,2ʹ -azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) and nitrite scavenging activity. We have also evaluated the reducing power activity of LS. LS extracts showed a good radical scavenging activity on DPPH and ABTS free radical as concentration dependent manner. The IC50 values on DPPH radical scavenging activity were 0.75 mg/mL and 0.54 mg/mL for water and ethanol extract respectively. ABTS radical scavenging activity ranges from 38-89 % for water extract and 33-96% for ethanol extract. Although ethanolic extract showed a higher radical scavenging activity as compared to the water extracts. All the extracts exhibited reducing power activity, dose dependently. Moreover, when the DNA was treated with the extracts, supercoiled DNA was restored in a concentration-dependent manner. Conclusion : According to the results, we suggest that LS contains considerable amount of phenolic and flavonoid content and could be used as a source of natural antioxidant substances and oxidative DNA damage preventer.
        35.
        2016.10 서비스 종료(열람 제한)
        Background : Achyranthes japonica Nakai (AJ) is a perennial herb with a wide distribution in East Asia including Korea, China, and Japan, and it is mainly used as a medicinal plant. In Korea, AJ has been widely used to control pain and improve symptoms in OA patients. AJ contains several important phytochemicals such as saponins, inokosterone, ecdysterone, and oleanolic acid bisdesmoside. Methods and Results : The aim of this work was to investigate the antioxidant and anti-inflammatory activities of fermented and ethanol extracts of Achyranthes japonica Nakai (AJ). The extracts showed strong reductive power and nitrite scavenging, hydroxyl radical scavenging, superoxide radical scavenging, and DNA damage prevention activities. Treatment of RAW 264.7 macrophages with AJ inhibited lipopolysaccharide (LPS)-induced NO secretion and iNOS expression without affecting cell viability. AJ also inhibited cyclooxygenase 2 (COX-2) expression, leading to the suppression of COX-2-derived prostaglandin E2 production. These inhibitory effects of AJ were accompanied by reduced production of tumor necrosis factor-α and interleukins (IL)-1β, -6, and -10. Furthermore, AJ suppressed LPS-induced phosphorylation of extracellular signal regulated kinase, c-Jun N-terminal kinase, and p38. Moreover, AJ inhibited malondialdehyde production and myeloperoxidase activity in LPS-stimulated RAW 264.7 cells. Conclusion : The antioxidant activity of plants is closely related to their medicinal properties and is widely used as a parameter to determine the bioavailability of medicinal plants. The antioxidant and biological activities of AJ extracts might be due to the synergistic actions of multiple bioactive compounds. It can be concluded that AJ extracts are a potential source of biologically important drug candidates.
        36.
        2016.10 서비스 종료(열람 제한)
        Background : ROS produced by oxidative stress damaged endothelial cells, and cause a variety of vascular complications. In diabetic hyperglycemia state, ROS increase. The polyol pathway occur in diabetic complications, the excess glucose is absorbed into the polyol pathway when aldose reductase increased, NADPH changes it to sorbitol. Glutathione (GSH) removes ROS. GSH level is reduced by glutathione reductase, using NADPH as an electron donor. Activation of the polyol pathway decrease NADPH, and GSH also reduced. As a result, ROS is increased. In diabetic hyperglycemia state, Glycolysis increases. Effects of increased glycolysis, protein kinase C (PKC) is increased. NAD(P)H oxidase, stimulated by PKC-dependent pathway, increases ROS in the cell. In this study, we measured the ROS scavenging activity of 5 natural products (Lycii fructus, Astragalus membranaceus, Cassia Tora, Polygonatum odoratum, Rubus Coreanus), to confirm the efficacy as diabetic antioxidants. Methods and Results : We extracted 5 natural product by distilled water and ethanol. DPPH radical scavenging activity was significantly higher in Lycii fructus, Rubus coreanus. ABTS radical scavenging activity was better Rubus coreanus, Lycii fructus, Cassia Tora. In addition to, Rubus coreanus, Cassia Tora, Lycii fructus was comparatively higher reducing power activity than other natural products. And total phenolic and flavonoid contents were much higher in Rubus coreanus compared with other extracts. Conclusion : These results suggest that Lycii fructus, Rubus coreanus can be applied as diabetic antioxidant that prevent vascular complications caused by ROS.
        37.
        2016.05 서비스 종료(열람 제한)
        Background : Dioscorea quinqueloba(DQ) is a medicinal herb that is used as an alternative therapy for cardiovascular disease and various medical conditions. The objective of this study was to characterize the antioxidant activities of DQ. Methods and Results : The samples were extracted with Distilled water and analyzed for total flavonoid contents, polyphenol contents, DPPH radical scavenging activity, and ABTS radical scavenging activity. H9c2 cardiomyoblast cells were subjected to H2O2, to study the protective effect of DQ on cell viability, and ROS production. The total amounts of polyphenols and flavonoids, which indicate the antioxidant capabillity of water extracts from DQ were 27.21mg/g and 22.95mg/g, respectively. The DQ water extract showed highest antioxidant activity by DPPH and ABTS scavenging activities. The DQ water extract was protected cells against H₂O₂-induced cell death without any cytotoxicity, as determined by the MTT assay. The DQ water extract also was inhibiting production of intracellular ROS. Conclusion : These observations suggest that DQ can use potentially good natural antioxidant in daily life for possible health benefits.
        38.
        2016.05 서비스 종료(열람 제한)
        Background : Osteoclasts as multinucleated cells originate from hematopoietic monocyte/ macrophage precursor cell, shows the bone absorption through the commitment, differentiation, fusion, and bone resorption stages by regulation of M-CSF and RANKL. It has been reported a significant negative correlation between the increase of oxidative stress and the bone density, and when RANKL reaction to the osteoclasts precursor cells is mainly generated ROS is due to increased activity of NADPH oxidase1 (NOX1), and these ROS act as a factor which promotes osteoclasts differentiation. Thus, RANKL signaling process is important that excessive osteoclast formation and differentiation inhibited through the regulation of each step. Methods and Results : F3570 ethanol extract showed relatively high activity at in-vitro antioxidant activity. F3570 water extract inhibited ROS generation in RAW 264.7 cells stimulated with H2O2 and RANKL, even at low concentrations. The inhibitory effect of osteoclast differentiation on F3570 water extract was confirmed that shown through NF-κB pathway, MAPK pathway including ERK and JNK. F3570 ethanol extract is considered to be regulated by the p38 MAPK and the other signaling pathway. Also, F3570 both water and ethanol extract were significantly reduced gene expression such as TRAP, calcitonin receptors and integrin β3 of RANKL-induced mature osteoclast in the bone resorption stage. Conclusion : Through this study, F3570 extract revealed an outstanding inhibitory effect and signaling mechanisms in osteoclast differentiation induced by RANKL. These results suggest that F3570 is bone diseases associated with aging or osteoporosis caused by menopause in an aging society is expected to be a superior candidate for the treatment or the prevention
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