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Deodorization Effect of Supercritical Carbon Dioxide Extraction on Gastrodia elata Powder
Gwi Yeong Jang(장귀영),Eun Suk Lee(이은숙),Ji Yeon Lee(이지연),Yun Jeong Jee(지윤정),Su Ji Choi(최수지),Seung Eun Lee(이승은),Hyung Don Kim(김형돈),Je Hun Choi(최재훈),Min Hye Kang(강민혜),Dong Hwi Kim(김동휘) 한국약용작물학회 2020 한국약용작물학회 학술대회논문집 Vol.2020 No.1
단위중량 2,000㎏/㎥급 고강도 시멘트 복합체 개발을 위한 기초연구
정연웅(Yeon-Ung Jeong),임귀환(Gwi-Hwan Lim),강용학(Yong-Hak Kang),정상화(Sang-hwa Jung),김주형(Joo-Hyung Kim) 한국건설순환자원학회 2020 한국건설순환자원학회 논문집 Vol.8 No.4
본 연구에서는 단위중량 2,000㎏/㎥ 이하의 고강도 시멘트 복합체 제조기술 및 기초 물성을 탐구한다. 선행연구에서 제시한 초고성능콘크리트의 배합에서 잔골재를 경량 재료인 솔리드 버블과 경량잔골재로 치환하여 경량 고강도 시멘트 복합체를 제조기술을 제안한다. 솔리드 버블을 혼입한 시멘트 복합체는 밀도 2.0g/㎤ 이하에서 재령 28일 강도 116MPa∼141MPa의 고강도 발현이 가능한 것으로 나타났다. 경량잔골재를 사용하는 경우 솔리드 버블을 혼입한 시멘트 복합체보다 역학적 성능이 떨어지는 것으로 나타났다. 배합표상에서 계산된 단위용적중량과 경화된 시멘트 복합체의 밀도가 큰 차이를 보이지 않았으며, 이는 배합표상에서 계산된 단위용적중량을 통해 경화된 시멘트 복합체의 밀도를 추정할 수 있는 것을 보여준다. This study explores manufacturing technology and basic properties of high strength cement composites at 2,000㎏/㎥ of specific weight. It is suggested that lightweight-high strength cement composites can be produced by substituting silica sand in ulta-high performance concrete mixture with lightweight materials such as solid bubbles and lightweight fine aggregates. The 28-day compressive strengths of cement composites with solid bubbles were from 116MPa to 141MPa at below 2.0g/㎤ of unit density while the cement composites with lightweight aggregates possessed lower compressive strength and higher unit density. The specific weight calculated from mixture proportions did not have significant difference with unit density of hardened cement composites, indicating that unit density of hardened cement composites can be estimated from the specific weight in mixture proportions.
유창연,강화석,강위수,이귀현,오재헌 한국환경농학회 1996 한국환경농학회지 Vol.15 No.1
본 연구는 LPG를 사용한 방열장치를 이용하여 잡초종자를 열처리한 후 처리온도간에 차이가 있다는 판단하에 잡초종자의 발아력에 관계하는 잡초의 종류, 잡초종자의 상태, 조사시간을 실험의 변수로 선택하여 그 주효과 및 각 변수간의 상호작용에 대한 효과를 분석하여 열처리 잡초방제 방법 개발에 필요한 기초자료를 제공하고자 하였다. 실험에 이용된 잡초종자는 화본과인 바랭이(Digitaria sanguinalis S.)와 쌍자엽잡초인 쇠비름(Portulaca oleracea L.)의 건조종자 및 습윤종자(증류수에 24시간 침지)를 사용하였고, 5개의 온도 수준과 8개수준의 조사시간으로 각 종자를 똑같이 처리하였으며 각 처리별로 3회 반복하였다. 본 실험의 결과를 요약하면 다음과 같다. 1) 각 변수에 대한 잡초종자의 발아력은 처리 온도가 150℃일 때를 제외하고 평균 발아율이 모두(1% 유의수준) 차이가 있는 것으로 분석되었다. 잡초종자의 처리상태에 대해서는 평균 발아율이 60℃에서는 유의성이 없었으며 80℃, 100,℃, 200℃에서는 1%의 유의수준에서 차이가 있는 것으로 분석되었고 150℃에서는 5%의 유의수준에서 차이가 있는 것으로 나타났다. 2) 조사시간에 따른 잡초의 평균발아율은 모든 처리온도 수준에서 차이가 있는 것으로 분석되었고(1% 유의수준), 모든 온도수준에서 잡초의 종류와 조사시간 사이에 상호작용이 있는 것으로 나타났다(1%유의수준). 3) 잡초의 처리상태와 조사시간 사이에도 역시 각 온도수준에서 차이가 있는 것으로 나타났고(1% 유의수준), 잡초의 종류와 잡초의 처리상태 간에는 60℃를 제외한 모든 온도수준에서 차이가 있는 것으로 나타났다(1% 유의수준). 4) 잡초의 평균발아율은 각 온도 수준에서 조사 시간에 따라 가장 큰 영향을 받는 것으로 분석되었다. This study was to provide the basic information for the development of thermal weeder which uses LPG as fuel. Weed seeds of Digitaria sanguinalis S. and Portulaca oleracea L. mainly developed in from and forestry nurseries were used as experimental samples. At different irradiation temperature(60, 80, 100, 150, 200℃), the dffects of weed seed species(digitalis, purslane), condition of seed(dry, soaked), and irradiation time(2, 5, 10, 20, 30, 60, 180, 300 sec) on seed viability were investigated was investigated by examining interaction and main effect of experimental factors. The results showed that viability of weed seed was significantly affected by all irradiation temperature tested. Irradiation time significantly affected on viability of weed seed on all levels of irradiation temperature. also, there were interactions between condition of weed seed and irradiation time on seed viability at each irradiation temperature.
장종범,김태균,Yeon Gwi Kang,성상철,강승백 대한의학회 2014 Journal of Korean medical science Vol.29 No.10
This study sought to demonstrate bone mineral density (BMD) conditions in elderly femalepatients with knee osteoarthritis (OA) undergoing total knee arthroplasty (TKA). Inaddition, we sought to determine whether their BMD conditions differ from those ofcommunity-based females without knee OA. Finally we sought to determine whetherclinical statuses are related to BMD in the knee OA patients. BMD conditions in 347 femalepatients undergoing TKA and 273 community-based females were evaluated. Additionally,comparative analyses of BMD between age and body mass index-matched knee OA groups(n = 212) and the control groups (n = 212) were performed. In the pre-matched knee OAgroup, regression analyses were performed to determine whether preoperative clinicalstatuses were related to BMD. Considerable prevalence of coexistent osteoporosis (31%)was found in the pre-matched knee OA patients undergoing TKA. We found no significantdifferences of the BMD T-scores and the prevalence of osteoporosis between the age andbody mass index-matched knee OA and control groups. In the pre-matched knee OApatients, poorer preoperative clinical scores were related to poorer BMD T-scores in theproximal femur and/or lumbar spine. Our study suggests that more attention should bepaid to identify and treat osteoporosis in elderly female patients with advanced knee OAundergoing TKA.
Park, Jun Yeon,Lee, Dahae,Jang, Hyuk-Jai,Jang, Dae Sik,Kwon, Hak Cheol,Kim, Ki Hyun,Kim, Su-Nam,Hwang, Gwi Seo,Kang, Ki Sung,Eom, Dae-Woon Hindawi Publishing Corporation 2015 Evidence-based Complementary and Alternative Medic Vol.2015 No.-
<P>The present study investigated the renoprotective effect of an <I>Artemisia asiatica</I> extract and eupatilin in kidney epithelial (LLC-PK1) cells. Although cisplatin is effective against several cancers, its use is limited due to severe nephrotoxicity. Eupatilin is a flavonoid compound isolated from the <I>Artemisia</I> plant and possesses antioxidant as well as potent anticancer properties. In the LLC-PK1 cellular model, the decline in cell viability induced by oxidative stress, such as that induced by cisplatin, was significantly and dose-dependently inhibited by the <I>A. asiatica</I> extract and eupatilin. The increased protein expressions of phosphorylated JNK and p38 by cisplatin in cells were markedly reduced after <I>A. asiatica</I> extract or eupatilin cotreatment. The elevated expression of cleaved caspase-3 was significantly reduced by <I>A. asiatica</I> extract and eupatilin, and the elevated percentage of apoptotic cells after cisplatin treatment in LLC-PK1 cells was markedly decreased by cotreatment with <I>A. asiatica</I> extract or eupatilin. Taken together, these results suggest that <I>A. asiatica</I> extract and eupatilin could cure or prevent cisplatin-induced renal toxicity without any adverse effect; thus, it can be used in combination with cisplatin to prevent nephrotoxicity.</P>
Park, Jun Yeon,Lee, Dong-Soo,Kim, Chang-Eop,Shin, Myoung-Sook,Seo, Chang-Seob,Shin, Hyeun-Kyoo,Hwang, Gwi Seo,An, Jun Min,Kim, Su-Nam,Kang, Ki Sung The Korean Society of Ginseng 2018 Journal of Ginseng Research Vol.42 No.4
Background: Fermented black ginseng (FBG) is produced through several cycles of steam treatment of raw ginseng, at which point its color turns black. During this process, the original ginsenoside components of raw ginseng (e.g., Re, Rg1, Rb1, Rc, and Rb2) are altered, and less-polar ginsenosides are generated (e.g., Rg3, Rg5, Rk1, and Rh4). The aim of this study was to determine the effect of FBG on wound healing. Methods: The effects of FBG on tube formation and on scratch wound healing were measured using human umbilical vein endothelial cells (HUVECs) and HaCaT cells, respectively. Protein phosphorylation of mitogen-activated protein kinase was evaluated via Western blotting. Finally, the wound-healing effects of FBG were assessed using an experimental cutaneous wounds model in mice. Results and Conclusion: The results showed that FBG enhanced the tube formation in HUVECs and migration in HaCaT cells. Western blot analysis revealed that FBG stimulated the phosphorylation of p38 and extracellular signal-regulated kinase in HaCaT cells. Moreover, mice treated with $25{\mu}g/mL$ of FBG exhibited faster wound closure than the control mice did in the experimental cutaneous wounds model in mice.