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새로운 주름개선 소재: 3,9-diferuloyl-6-oxopterocarpen (Tensolin-F<sup>®</sup>)의 개발과 화장품 응용
이범천 ( Bum-chun Lee ),이정재 ( Jeong-jae Lee ),박성민 ( Sung-min Park ),김철배 ( Chul-bae Kim ),심관섭 ( Gwan-sub Sim ),김진화 ( Jin-hwa Kim ),이근수 ( Geun-soo Lee ),이천일 ( Chun-il Lee ),표형배 ( Hyeong-bae Pyo ) 대한화장품학회 2004 대한화장품학회지 Vol.30 No.1
3,9-Dihydro-6-oxopterocarpen과 ferulic acid의 에스테르 반응을 통해 페룰산 유도체인 3,9-diferuloyl-6-oxopterocarpen (Tensolin-F<sup>®</sup>)를 합성하여 이를 함유한 주름개선 화장품을 개발하였다. Tensolin-F<sup>®</sup>는 농도 의존적으로 DPPH와 superoxide radical에 대한 소거효과를 나타냈으며, 각각 0.8 mM에서 78%, 0.053 mM에서 92.9%로 DPPH와 superoxide radical을 소거하여 우수한 항산화 효과를 나타내었다. MMP-1 효소 활성 저해 효과도 0.16 mM에서 74%를 저해하였다. HDF에서 UVA에 의해 발현이 증가되는 MMP-1의 발현 저해 효과는 Tensolin-F<sup>®</sup> 0.8 uM에서 85.5%로 단백질 수준에서 모두 농도 의존적으로 발현 저해효과가 나타났다. Tensolin-F<sup>®</sup>를 함유한 제품의 피부 주름개선 효과 평가 결과, Tensolin-F<sup>®</sup>를 함유한 화장품을 약 8주 간 도포한 경우 유의한 주름개선 효과가 있음을 확인 할 수 있었다. 본 연구를 통하여 Tensolin-F<sup>®</sup>는 항산화 효과와 MMP-1활성 저해 효과 및 UVA에 의한 MMP-1의 발현을 저해하는 효과가 나타났으며 새로운 주름개선 기능성 화장품으로 이용될 수 있을 것이다. As a novel anti-wrinkle agent, 3,9-diferuloyl-6-oxopterocarpen (Tensolin-F<sup>®</sup>) has been synthesized and its anti-aging effects have been investigated. In the present study, to investigate the relationship between aging and Tensolin-F<sup>®</sup>, we examined its effect on scavenging activities of radicals and reactive oxygen species (ROS), in vitro inhibition activity of matrix-metalloproteinase (MMP) and expression of UVA-induced MMPs in human dermal fibroblasts (HDF). Tensolin-F<sup>®</sup> was found to show activities of scavenging radicals and ROS with the IC<sub>50</sub> values of 0.2 mM and 0.95 mM against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and superoxide radicals, respectively, in the xanthine/xanthine oxidase system. Fluorometric assays for the proteolytic activities of MMP-l (collagenase) were performed using fluorescent collagen substrates. Tensolin-F<sup>®</sup> inhibited the activities of MMP-l in a dose-dependent manner and the IC<sub>50</sub> values calculated from semi-log plots were 0.025 mM. Also, UVA induced MMP-1 expression was reduced 85% by treatment with Tensolin-F<sup>®</sup> at 0.8 uM, which was reduced dose-dependent manner. The results of clinical study showed that 4.8 mM Tensolin-F<sup>®</sup> treated group reduced wrinkle significantly compared with placebo treated group (P<0.05). Taken together, these result suggest that Tensolin-F<sup>®</sup> act as an anti-wrinkle agent by taking effects to antioxidation and reducing UVA-induced MMP-l production.-l production.
이천용 ( Chun Yong Lee ) 한국산림과학회 1983 한국산림과학회지 Vol.60 No.1
This survey was carried out in Schneegattern Forest District which is located 40 ㎞ northeast of Salzburg, Austria. The purpose of interpretation with two sampling methods, stratified sampling and unstratified sampling, on B & W infrared photos, with a scale of 1:10,000 was to know coniferous stand volumn and to reduce the cost, Forest stands were classified into 4 groups; those were non-forest, young stands, beech, coniferous stands. Coniferous and beech stands were devided into age classes I (41-80 years), II (above 81 years). After this delineation sample points were designated on the orthophoto map whose data were transferred from the aerial photos. The volumn data were calculated from DBH using relascope in the field and the results were as follows. 1) Coniferous stand volumn per hactare was 470±31.9㎥ 2) The diameter distribution of C₁ was binomial, but C₂ showed normal distribution. 3) The stratified sampling method was better than unstratified sampling method.
산림토양내 질소의 양료화와 (養料化) 질산화에 관한 연구 : ion 교환수지의 처리 방법에 따른 질소의 흡수율 변화
이천용(Chun Yong Lee),David D . Myrold(David D . Myrold) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.3
Soil N mineralization and nitrification can be measured conveniently using mixed bed (canon and anion) exchange resin bags. However, appropriate use of these resin bags requires pretreatment to avoid colorimetric interference and standardize N ion adsorption. Three pretreatments were evaluated : control (untreated), 2 M NaCl with a distilled water rinse, and 4 M NaCl. The 4 M NaCl treatment was effective at removing background levels of NH₄^+ and NO₃^-, but adsorbed low amounts (about 40%) of inorganic N from standard solutions. Untreated resin bags adsorbed a constant, higher amount of NO₃^- (60%), but did not remove background levels of NH₄^+. The 2 M NaCl treatment followed by a distilled water rinse performed best : it removed background NH₄^+ and adsorbed a constant amount of both NH₄^+ (70%) and NO₃^- (60%). Because the ion exchange resin is fairly expensive, we also tested if the resin bags could be reused. Resin bags were either loaded with NH₄^+ and ~i0- in the laboratory or incubated in soil in the field, desorbed with the 2 M NaCl treatment, and then loaded with standard NH₄^+ and NO₃^- solutions. Lab loaded resin bags adsorbed about 60% of inorganic N then loaded with 2.5 or 5.0 ㎎ N 1^(-1) and 70% when loaded at 10 or 20㎎ N 1^(-1), whereas reused field incubated bags showed the opposite adsorption efficiency. These results demonstrate that resin bags can give reproducible results, but care must be taken to evaluate the effect of pretreatment and potential for reuse.
교도소에서 의뢰된 급성 하악 지치 주위염의 보존적 감염관리:
이천의(Chun-Ui Lee),유재하(Jae-Ha Yoo),최병호(Byung-Ho Choi),설성한(Sung-Han Sul),김하랑(Ha-Rang Kim),모동엽(Dong-Yub Mo),김종배(Jong-Bae Kim) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.1
In the presence of acute pericoronitis of mandilbular third molar, antibiotic therapy and early incision and drainage are the method of choice, followed by definitive surgical extraction of the tooth as soon as it becomes subacute. If excision of the overlying tissues is decided on, it should be done adequately. All overlying tissues must be throughly excised, and the crown portion of the unerupted tooth should be completely exposed. After excision has been completed, the wound should be managed with a surgical dressing. This should be allowed to remain approximately 7 days. And then, surgical extraction of the impacted mandibular third molar can be done usually. In this operation, there are many complications, such as, postoperative bleeding, infection, trismus, dysphasia and paresthesia. The surgeon are discredited and medicolegal problem may be occurred in the presence of many distressed complications. Therefore, the relatively nonsurgical treatment is the method of choice. So, authors selected the conservative treatment methods of incision and drainage, primary endodontic drainage, operculectomy without surgical extraction of the mandibular third molars. The results were more favorable without the postoperative complication in Wonju old offender prison.
심장이식후 발생한 대장기종 ( Pneumatosis Cystoides Intestinalis )
이천균(Chun Kyun Lee),송시영(Si Young Song),이용찬(Yong Chan Lee),장병철(Byung Chul Chang),문영명(Young Myung Moon),강진경(Jin Kyung Kang),박인서(In Suh Park) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.5
Pneumatosis cystoides intestinalis(PCl) is a rare disease of undetermined etiology which is characterized by multiple gas-filled cysts in the wall of the small or large intestine or both. It is associated with various medicosurgical conditions including organ transplantation. Fewer than 50 cases of PCI occurring after organ transplantation including 4 cases of cardiac transplantation have been reported in the world literatures. We report a 47-year-old man of PCI who suffered from right lower quadrant abdomina) pain for 1 week. He was taken heart transplantation due to acute myocardiac infarction and ischemic cardiomyopathy 1 year ago. On plain abdominal X-ray revealed the multiple clustered localized collections of gas in the ascending and hepatic flexure of colon. Co]onoscopy showed the typical finding of PCI, which was multiple variable size protruding masses which apperared as round, soft, and somewhat bluish colored cysts. After the puncture of the above cystic mass using endoscopic injection needle, we can observe the deflation of the above ass. This is the first case in Korea. (Korean J Gastroenterol 1995;27: 732 - 737)
이천재(Lee. Chun Jae),반승주(Ban, Seoung Ju),김재태(Kim, Jae Tae) 대한부동산학회 2020 大韓不動産學會誌 Vol.38 No.3
본 연구는 대량주택의 공급지가 거의 고갈된 현실에서 소규모주택의 공급확대로 주거난을 개선하기 위하여, 해당시설 개발 시 개발자가 주로 고려하는 요인들의 중요도와 우선순위를 파악하고, 종합적으로 비교· 분석하여 살펴보고자 한다. 개발사업은 사업성과 분양성 모두를 살펴보아야 하는 바 이들을 선행연구 검토와 FGI를 통해 변수를 선정하고, 전문가 그룹을 대상으로 관련 자료를 구축한 후 도출된 결과를 종합적으로 비교· 분석하였다. 본 연구의 분석 결과, 분양성요소가 사업성요소보다 상대적으로 중요도를 높게 인식하고 있었다. 이는 소규모 개발사업도 궁극적으로는 수요자의 니즈에 맞는 주거시설을 제공하여야 분양이 되고 결국 사업성이 확보되기 때문으로 여겨진다. 본 연구를 바탕으로 사업성과 분양성 요인의 중요도와 우선순위를 종합적으로 비교·분석하여, 양측의 융합된 중요요인을 도출한다면 개발사업의 궁극적인 목표달성에 큰 도움이 될 수 있으리라 생각한다. 또한 시스템적인 측면에서 본 연구가 주는 시사점을 기반으로 입지분석 및 수지분석, 경제상황 여부보다는, 대출제한 여부에 따라 시장성의 차이가 크게 나타나는 소규모 개발사업의 특징을 고려하여 금융시장 활용방안 등, 제반 여건의 활용으로 소규모 주택개발도 원활히 이루어질 것이 필요하다고 여겨진다. The purpose of this study is to identify the importance and priority of factors to be considered from the supplier side in a small-scale house development project, and comprehensively compare and analyze them to derive the fused important factors of both. For this purpose, variables were selected through prior research review and FGI by classifying them as business feasibility (supplier-side), and the results obtained after establishing relevant data for a group of experts were comprehensively compared and analyzed. The implications of this study are that the importance of the factors of sale is perceived to be relatively higher than that of the factors of business. This can be interpreted as thinking that residential facilities should be provided to meet the needs of consumers for the success of small-scale house projects. Based on this study, it is believed that applying the convergence of important factors derived from both suppliers and consumers will greatly help small-scale house development projects succeed.