큰뱀무 추출물의 항산화 활성 및 항노화에 관한 연구

김민지 ( Min Ji Kim ),양현갑 ( Hyun Gab Yang ),박수남 ( Soo Nam Park ) 대한화장품학회 2011 대한화장품학회지 Vol.37 No.2

본 연구에서는 큰뱀무 추출물의 항산화 활성 및 미백과 주름에 관련된 tyroinase, elastase 저해 효과에 관한 조사를 수행하였다. 추출물의 free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) 소거활성(FSC₅₀)은 ethyl acetate 분획에서 4.70 μg/mL로 측정되었다. Luminol-의존성 화학발광법을 이용한 Fe³⁺-EDTA/H₂O₂ 계에서 생성된 활성산소종(reactive oxygen species, ROS)에 대한 큰뱀무 추출물의 총 항산화능은 ethyl acetate 분획 0.22 μg/mL로, ethyl acetate 분획에서 가장 큰 활성을 나타내었다. 큰뱀무 추출물에 대하여 rose-bengal로 증감된 사람 적혈구의 광용혈에 대한 억제 효과를 측정하였다. 큰뱀무 추출물의 경우 1 ~ 25 μg/mL의 농도에서 광용혈을 억제하였다. 특히 ethyl acetate 분획은 10 μg/mL 농도에서 τ₅₀이 416.20 min으로 매우 큰 세포보호 효과를 나타내었다. 미백 효과측정으로는 tyrosinase의 활성 저해 효과(IC₅₀)를 측정하였는데 ethyl acetate 분획에서 95.23 μg/mL로 나타났으며 elastase의 활성 저해 효과(IC₅₀)는 50 % 에탄올 추출물과 ethyl acetate 분획이 각각 6.27, 4.31 μg/mL로 나타났다. 이상의 결과들은 큰뱀무 추출물이 ¹O₂ 혹은 다른 ROS를 소광시키거나 소거함으로써, 그리고 ROS에 대항하여 세포막을 보호함으로써 생체계, 특히 태양 자외선에 노출된 피부에서 항산화제로서 작용할 수 있음을 가리킨다. 또한 큰뱀무 추출물의 ethyl acetate 분획의 tyrosinase, elastase 저해활성으로부터 항산화 및 항노화 화장품 소재로서의 응용 가능성을 확인하였다. In this study, antioxidative effects and inhibitory effects of Geum aleppicum Jacq. extracts on tyrosinase and elastase were investigated. The ethyl acetate fraction of G. aleppicum Jacq. extract (4.70 μg/mL) showed the most prominent free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity (FSC₅₀). Reactive oxygen species (ROS) scavenging activities (OSC₅₀) of some G. aleppicum Jacq. extracts on ROS generated in Fe³⁺-EDTA/ H₂O₂ system were investigated using the luminol-dependent chemiluminescence assay. The ethyl acetate fraction showed the most prominent ROS scavenging activity (0.22 μg/mL). The protective effects of extract/fraction of G. aleppicum Jacq. against the rose-bengal sensitized photohemolysis of human erythrocytes were investigated. The G. aleppicum Jacq. extracts suppressed photohemolysis in a concentration dependent manner (1 ~ 25 μg/mL), particularly the ethyl acetate fraction exhibited the most prominent celluar protective effect (τ₅₀, 416.20 min at 10 μg/mL). The inhibitory effect of G. aleppicum Jacq. extracts on tyrosinase and elastase were investigated to assess their whitening and anti-winkle efficacy. The half maximal inhibitory concentration (IC₅₀) of the ethyl acetate fraction on tyrosinase was 95.23 μg/mL. The IC₅₀ of 50 % ethanol extract and the ethyl acetate fraction on elastase were 6.27 μg/mL and 4.31 μg/mL, respectively. These results indicate that extract/fraction of G. aleppicum Jacq. can function as antioxidants in biological systems, particularly skin exposed to UV radiation by scavenging ¹O₂ and other ROS, and protect cellular membranes against ROS. Especially the ethyl acetate fraction of G. aleppicum Jacq. extracts could be applicable to new functional cosmetics for antioxidant, antiaging.

Vector 合成法을 이용한 Booming Noise 低減에 關한 硏究

김재열,유신,오성민,장종훈,김갑중 조선대학교 생산기술연구소 1997 生産技術硏究 Vol.19 No.1

Booming Noise of a Automotive can be divided in Air Borne Noise and Structure Borne Noise. In this study, Booming Noise is reduced by the vector Synthesis method. The vibration that transferred by the engine is managed. The car that by the used model is composed of Mount system supported to three point with 2000 cc 14 engine FR vehicle. The vibration that is transmitted from propeller sharft and Differential Gear to Sub Frame and Suspention effect Booming Noise. but, The vibration that generated by the Mount has Booming Noise more than it. So, We research that sound generated by the Mount and reduce that Booming Noise used the Dynamic Damper. The Booming. Noise by the vector Synthesis. is reduced in 2000 ~ 4000 rpm front of vehicle. We know that Booming Noise is reduced into hoped for rpm by the vector Synthesis.

국내 시판 항생제의 허가 용량 및 용법의 적정성에 대한 고찰 : 국내 약제사용설명서(package insert)와 미국 Physicians' Desk Reference의 비교 Comparison of Domestic Package Inserts with Physicians' Desk Reference

이재갑,이연주,황병연,정혜원,정성주,김성범,정희진,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

목적 : 국내 시판중인 항생제의 1일 투여량과 투여간격의 적정성을 확인하고 적응증 및 중증도에 따른 항생제 용량 제시 여부를 확인하기 위하여 항생제 시판시 KFDA의 허가사항을 담은 약제사용설명서을 미국 FDA 공인 약제에 대한 사용지침으로 쓰이고 있는 PDR(Physicians' Desk Peference)과 비교하였다. 방법 : PDR에 등재되어 있는 항생제 중에서 시럽 및 도포용 항생제를 제외한 총 61종에서, 국내에 시판되어 있는 51종 항생제의 약제사용설명서를 대상으로 1일 투여량, 투약횟수, 적응증 및 중증도에 따른 설명 정도를 비교하였다. 결과 : 1) 1일 투여량 비교 : 비교 가능한 전체 항생제에서, 약제사용설명서가 PDR보다 적은 용량을 제시한 경우는 경구용 8종, 주사용 11종으로 총 19종(37%)였으며, 많은 용량을 제시한 경우는 경구용만 2(4%)종이었고, 동일하거나 비슷한 용량을 제시한 경우는 경구용 15종, 주사용 15종으로 총 30(59%)종이었다. 약제사용설명서에서 적은 용량이 제시된 항생제 중 경구용인 cefdnir, cefixime, cefpodoxime, ofloxacin, levofloxacin, norfloxacin(6종), 주사용인 cefazolin, cefotetan, ceftizoxime, meropenem (4종) 등 반수이상의 약제가 일본제약회사로부터 국내에 수입된 약들이었으며 일본의 약제 사용설명서와 동일한 용량을 제시한 것을 알 수 있다. 2) 투여간격 비교 : 비교가능한 항생제 51종 중에서 국내약제사용설명서가 PDR과 동일한 투약횟수, 투여간격을 제시한 항생제는 30종(59%)이었다. 국내 약제사용설명서가 PDR보다 적은 투약횟수, 긴 투여간격을 제시한 항생제는 9종(17%)이었다. 오히려 많은 투약횟수, 짧은 투여간격을 제시한 항생제가 12종(24%)이나 되었다. 경구용만 비교하였을 경우 국내 약제사용설명서가 PDR보다 적은 투약횟수를 제시한 항생제는 없었으며, 동일하세 제시한 경우는 15종, 빈번한 투약횟수를 제시한 경우는 10종이었다. 주사용 항생제에서 국내 약제사용설명서가 PDR보다 긴 투여간격을 제시한 항생제는 9종, 동일한 경우는 15종, 짧은 투여간격을 제시한 경우는 2종이었다. 3) 적응증 및 중증도에 따른 비교 : 약제사용설명서에서 적응증 또는 중증도에 따른 용량에 대한 설명이 부족한 경우는 경구용 13종, 주사용 7종으로 총 20종(39%)이었으며, PDR에서는 경구용 1종, 주사용 2종으로 총 3종(6%)이었다. 결론 : 항생제에 첨부되는 약제사용설명서 및 약제사용설명서를 바탕으로 편집되는 의약품집이 항생제를 처방하는 의사들이 용법과 용량을 결정함에 있어 참고 역할을 하고 있으나, 국내의 시판 허가사항을 담은 약제사용설명서가 많은 수에서 적응증 또는 중증도에 따른 1일 투여량과 투여간격에 대한 정확한 정보를 제공하고 있지 못하고 있다. Background : The appropriate usage of antibiotics needs informations such as its effectiveness for a given infection, administration route, the amount of effective dose, and the dose intervals. In this study, in order to find any significant discrepancy regarding to the details of explanation of the necessary information for appropriate antibiotic usages, we compares informations about 51 antibiotics, one from package inserts in Korea and the other from physician's desk reference (PDR) certified by FDA in the United States of America. Materials and Methods : Package inserts about antibiotics, only oral or parenteral agent, wereperused to collect three categories of data: the recommended dosage, dose interval, and adjustment of dose to indications or the severity of infection. These data available in Korea were compared with 61 antibiotics (32 oral and 29 parenteral agents) cited in PDR. Results : Package inserts for 51 antibiotics were gathered, because the remaining 10 antibiotics in PDR are not domestically commercialized. Among data on antibiotics comparable with those in PDR, 59% (30 cases: 15 oral and 15 parenteral agents) suggested the dose similar to that of PDR, 37% (19 cases: 8 oral and 11 parenteral agents) recommend less dose, and 4% in only 2 oral agents showed more dose. About half of the drugs recommending lower dosage were imported from Japanese pharmaceutical company, and the recommended doses of these antimicrobial agents were similar to those in Japan. About 59% (30 cases: 15 oral and 15 parenteral agents) directed dose interval or duration similar to those of PDR and 17% (9 parenteral agents) suggested less administration or longer duration. Surprisingly, in contrast to only 6% (3 cases) of PDR, 24% (12 cases : 10 oral and 2 parenteral agents) recommended more administration or shorter duration. About 39% (24 cases: 13 oral and 7 parenteral agents) revealed no information for dose adjustment commons to indications or the severity of infection. Conclusion : This study revealed that many guidelines in Korea recommend lower doses and/or unreasonable dose intervals. In future studies, improved antibiotic usage guidelines should be established based on pharmacokinetic and pharmacodynamic researches, on the aspect of optimal dosage, dose interval, and dose adjustment commensurate to the indications and the severity of the infection.

점막유표피암종의 치험례

신민철,윤옥병,오승환,김여갑,이상철,신민철 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1

Mucoepidermoid carcinomas, first reported by Volkman(1895), form 6% to 9% of all salivary tumors. Two thirds affecting the parotid gland and the remaining third, the minor glands. As we could know from its name, mucoepidermoid carcinomas originate from ductal epithelium including squamous, mucous-secreting, and undifferentiated intermediate cells. Histologically, it is classified as well-differentiated (low grade), moderately-differentiated(intermediate grade), and poorly-differentiated (high grade) types and the treatment method and prognosis are influenced from its histological grade. We have experienced two cases of mucoepidermoid carcinoma treated surgically with good results and now would like to report these with review of literatures.

공동주택 바닥충격음 차단성능 등급화에 관한 연구

송민정,기노갑,장길수,김선우 대한건축학회 2004 대한건축학회논문집 Vol.20 No.10

A sound classification system for floor impact sound insulation performance is needed to secure comfortable acoustical quality in apartment houses To achieve this goal, psycho-acoustic experiments were earned out with the sound sources of standard light and heavy impact source in a laboratory As a result of this study, followings are suggested 49dB for light impact sound source and 46dB for heavy impact sound source are recommended minimum level for inhabitants And level differences between classes are 5dB But the situation of sound insulation performance against floor impact sounds can't meet this recommended level Due to these kinds of matters, foreign countries set the minimum class 58dB for light impact source(Europe) and 55dB for heavy impact source(japan) So, the sound insulation classification system in which its minimum class are 58dB(light), 55dB(heavy) and its interval is 5dB is suggested And arithmetic mean value of testing frequencies shows a good relation coefficient between subjective response and rating value both in light and heavy impact sound source

바닥마감재에 의한 바닥충격음 차음특성 연구

기노갑,정진연,송민정,김선우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

It is increasing the interest on the comfortable dwelling environment, while sound insulation performance of materials and elements used in building is falling down as they become thicker and lighter. Therefore, sound insulation performance in building has become the most important factor determining the level of housing, especially for apartment that has common wall and floor with next neighbors. This paper aims to experiment the sound insulation characteristics of floor coverings as their type and to analyse their noise reduction effect.

공동주택 바닥충격음 적정 평가어휘 조사에 관한 연구

송민정,송혁,이태강,기노갑,박현구,김선우 대한건축학회 2004 대한건축학회논문집 Vol.20 No.5

The "Sound Classification System on Floor Impact Sound Insulation Performance" is being studied in Korea. For that study, vocabularies appropriate for evaluation and reporting are needed. In this study, adequate words for evaluating floor impact sound have been extracted by reviewing the existing vocabularies and augmenting this with the results of a questionnaire prepared especially for apartment dwellers. As a result of this study, followings are suggested. 1) The heavy impact sound sources are more highly ranked than light impact ones. And the louder sound sources are the more accumulated points. 2) Highly ranked vocabularies are different for each source. 3) Floor impact sound evaluating words such as ‘Annoying’, ‘Disagreeable’, ‘Strident’, ‘Disturbed’, and ‘Dissonant’ are highly ranked. ‘Annoying’ is the word most accurately expressing the subjects' unpleasant feeling of domestic floor impact noise. 4)‘Unpleasant’, ‘Noisy’, ‘Irritating’, ‘Annoying’ are main unpleasant factors to floor impact sounds occurring in our domestic apartment houses.

상악골에 발생한 악성섬유성조직구종의 치험례

이상철,김여갑,류동목,이백수,윤옥병,신민철 大韓顎顔面成形再建外科學會 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.1

서울 강서지역 1개 대학병원에서 성인 급성 신우신염의 원인균과 항생제 감수성

황병연,이재갑,박대원,이연주,김성범,엄중식,손장욱,정희진,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

목적 : 3년간 서울시 강서지역의 1개 대학병원에서 입원치료를 받은 성인 급성 신우신염 환자를 대상으로 원인균과 항생제 감수성을 조사하고, 향후 급성 신우신염의 초기 경험적 치료 항생제를 제안하고자 하였다. 방법 : 1999년 1월부터 2001년 12월까지 3년간 고려대학교 의과대학 구로병원에 상부요로감염으로 내원한 16세 이상 환자 229명의 의무 기록을 검토를 통하여, 인구학적 특성, 원인균, 항생제 감수성, 초기 항생제 사용 양상과 입원기간을 조사하였다. 결과 : 연구에 포함된 229명을 118명의 단순 신우신염군과 111명의 복잡 신우신염군으로 구분 하였다. 단수 신우신염의 평균 발생 연령은 38.2세와 복잡 신우신염 56.1세로 복잡 신우신염 환자의 연령이 유의하게 높았다(P<0.001). 양군 모두에서 원인균 중 E. coli의 분리율이 가장 높았으며 항생제 감수성 결과 ampicillin, trimethoprim-sulfame-thoxazole에는 높은 내성률을 보였고, ciprofloxacin, gentamicin, cefotaxime에 대한 감수성은 비교적 높았으나 복잡 신우신염의 경우 단순 신우신염에 비하여 ciprofloxacin, gentamicin에 대한 감수성이 다소 낮은 것을 확인할 수 있었다. 평균 입원 기간, 항생제 투여 기간에 있어서도 복잡 신우신염군에서 유의하게 길었다. 결과 : 본 연구의 결과 서울의 강서 지역에서 대학병원급에 치료 의뢰되는 단순 급성 신우신염의 치료에 있어 1차 항생제로 3세대 cephalosporin, aminoglycoside, quinolone 중 한가지를 초기 경험적 치료제로 사용을 고려하여야 할 것으로 사료된다. Background : The purpose of this study is to recommend the initial therapeutic regimen for adult patients with acute pyelonephritis (APN) according to the changes of antimicrobial susceptibility patterns of causative microorganisms isolated from patients with APN. Methods : We reviewed medical charts of 229 APN patients, who had been treated at Korea University Guro Hospital from 1st of January. 1999 to 31st of December, 2001. We investigated the demographic data, clinical findings, durations of hospital treatment, antimicrobial susceptibility patterns of the causative microorganisms and initial antibiotic regimens in patients with APN. Results : In this study, 229 adult patients with APN were classified into simple APN patients (118 patients, 51.5%) and complicated APN patients (111 patients, 48.4%). Mean age of patients with simple APN was 38.2±14.1 years old and that of patients with complicated APN was 56.1±14.9 years old. Mean age of patients with complicated APN was significantly higher than that of simple APN patients (P<0.0001). Escherichia coli was the most common microorganism both in simple APN (96.7%) group and in complicated APN (90.6%) group. Antimicrobial susceptibility of E. coli was at the low level of ampicillin (31%/20%) and trimethoprim-sulfamethoxazole (42.6%/34.2%) in each group. In contrast, ciprofloxacin (11.5%/22.7%), gentamicin (16.4%/22%) and cefotaxime (0%/8.2%) resistance remained at relatively lower level. In comparison of simple APN with complicated APN, ciprofloxacin and gentamicin resistances were higher in complicted APN group. Average duration of hospitalization (5.9±2.3 days/8.2±4.6 days) and duration of antibiotic use (12.1±3.9 days/15.3±10.0 days) were significantly longer in complicated APN. Conclusions: The results of this study suggests that 3rd cephalosporin, aminoglycoside or quinolone antibiotic would considered as one of the initial therapeutic regimen for patients with simple APN in southwestern Seoul.

다제내성 그람양성균에 대한 Linezolid(Zyvox^(�))의 시험관내 항균력 비교

박대원,정희진,엄중식,황병연,김성범,이재갑,이연주,정혜원,정성주,박재형,이진수,손장욱,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

배경 : MRSA, VRE, VRSA같은 다제 내성 그람 양성균의 등장에 따라 glycopeptide를 대체할 새로운 항생제의 개발이 필요하게 되었고 결과적으로 새로운 항생제인 linezolid라는 항생제가 개발되었다. Linezolid는 이전의 항생제와는 다른 새로운 계열의 oxazolidinone으로 경구 이용률이 우수하다. 원내 및 원외감염의 중요한 원인균이 되고 있는 MRSA, VRE에 대한 적절한 경구용 항균제가 없는 국내에서 폐렴 및 피부 연조직 감염에서 경구용으로 사용해 볼 수 있는 약제이다. 본 연구에서는 고대 구로 병원에서 분리된 MRSA, VRE 등을 대상으로 다른 여러 항균제와 비교한 linezolid의 시험관내 항균력을 조사하고자 하였다. 재료 및 방법 : 연구대상은 1998년 1월부터 2000년 12월까지 본원에서 입원 및 외래를 통하여 피부 연조직 감염증 및 호흡기 감염증, 요로감염증으로 진단된 환자들의 가검물로부터 분리된 MRSA 60균주, VRE 43균주, PRSP 25균주를 액체배지 또는 한천배지 희석법을 통하여 linezolid 및 기타 항균제에 대한 최소발육억제농도를 구하였다. 결과 : 실험에 사용한 S. aureus는 모두 MRSA였고 이들은 linezolid에 대해 MIC_(90) 2㎍/㎖(MIC 범위 1-2㎍/㎖), Enterococcus spp는 모두 VRE로 linezolid의 MIC_(90)은 2㎍/㎖로 MIC 범위는 1-4㎍/㎖였다. 한 개의 균주에서 MIC 4㎍/㎖로 중등도 감수성을 보였으나 MIC breakpoint가 (8㎍/㎖인 내성균주는 없고 모두 감수성을 보였다. S. pneumoniae의 경우 penicillin 내성이었고, linezolid MIC_(90) 1㎍/㎖ (MIC 범위 0.5-1㎍/㎖)로 전부 감수성을 보였다. 결론 : Linezolid는 MRSA를 위시한 VRE, PRSP 등의 다제 내성 그람 양성균에 대하여 우수한 시험관내 항균력을 보임을 알 수 있었다. Background : The emergence of multi-drug resistant Gram-positive cocci, such as MRSA, VRE, and VRSA, necessitated to develop new antibiotics, which could replace the glycopeptide. As a result, a new antibiotics named linezolid was developed. Linezolid is different line of oxazolidinones with a good oral bioavailability, compared to other antibiotics. Since appropriate oral antibiotics are not presently available for MRSA, which is a major cause of nosocomial and community acquired infections, the introduction of linezolid will have favorable effect on treatment of infections such as pneumonia or skin infections. In this study, we investigated the antibiotic effect of linezolid on MRSA and VRE isolated from patients who were treated in Korea University Guro Hospital. Material and Methods : By using broth microdilution and agar dilution method we measured minimum inhibitory concentration (MIC) with sixty S. aureus, forty three Enterococcus spp., and twenty five S. pneumoniae isolates from patients who were diagnosed as skin, soft tissue, respiratory, and urinary infections in Korea University Guro Hospital from January, 1998 to December, 2002. Results : All of S. aureus used in this study were MRSA, and MIG_(90) of linezolid was below 2 ㎍/㎖ (MIC ranged between 1-2 ㎍/㎖). All of Enterococcus spp. were VRE, and had MIG_(90) of 2 ㎍/㎖ (MIC ranged between 1 to 4 ㎍/㎖). One of the VRE showed intermediate susceptibility with MIC of 4 ㎍/㎖. However, none was resistant with MIC breakpoint above 8 ㎍/㎖. All of S. pneumoniae were resistant to penicillin, but they were susceptible to linezolid with MICao of 1 ㎍/㎖(MIC range 0.5-1㎍/㎖). Conclusion : In conclusions, linezolid has an excellent in vitro antibiotic effect on multi-drug resistant Gram-positive cocci, such as MRSA, PRSP, and VRE.