가압가열 및 Microwave 처리에 의한 중력분 Gliadin의 항원성 변화

곽지희(Ji-Hee Kwak),김꽃봉우리(Koth-Bong-Woo-Ri Kim),이청조(Chung-Jo Lee),김민지(Min-Ji Kim),김동현(Dong-Hyun Kim),선우찬(Chan Sunwoo),정슬아(Seul-A Jung),강주연(Ju-Youn Kang),김현지(Hyun-Jee Kim),최정수(Jung-Su Choi),김성원(Seong-Won 한국식품영양과학회 2011 한국식품영양과학회지 Vol.40 No.10

본 연구에서는 가압가열 및 microwave 처리가 gliadin의 항원성에 미치는 영향을 살펴보기 위해 중력분에 가압가열과 microwave를 단독 또는 병행으로 처리하여 Ci-ELISA, SDS-PAGE 및 immunoblotting을 실시하였다. 가압가열 처리의 경우, 처리 시간이 길어질수록 IgG와의 결합력이 감소하였으며, 특히 50분 처리구에서 약 69%로 가장 낮은 결합력을 보였다. 또한 SDS-PAGE와 immunoblotting 결과에서도 무처리구에서 강하게 보였던 gliadin band가 처리에 의해 거의 소실되고 항체와 반응하지 않았다. 가압가열 및 microwave를 병행 처리한 경우도 마찬가지로 gliadin의 결합력이 다소 감소하였으며, 처리구 중에서는 가압가열 50분, microwave 5분 처리구에서 약 73%로 가장 낮은 결합력을 보였다. 반면 microwave를 단독으로 처리하였을 때에는 일부 단백질의 변화는 관찰되었으나 항원성 감소에는 큰 영향을 미치지 않았다. 이상의 결과를 통해 가압가열을 단독 처리에 의해 gliadin의 항원성이 다소 감소되었으며, microwave 병행 처리에 의한 차이는 크게 나타나지 않은 것을 확인하였다. This study was conducted to evaluate the effect of physical treatments on the antigenicity of gliadin in medium wheat flour. The wheat flour was treated with an autoclave (5, 10, 30, 50 min), a microwave (1, 5, 10 min), and both (10, 30, 50 min/ 5, 10 min), and investigated by SDS-PAGE, immunoblotting and Ci-ELISA using anti-gliadin IgG. The results showed that the binding ability of anti-gliadin IgG to gliadin in wheat flour was slightly decreased when autoclaved or when autoclaved and microwaved. Especially, it was reduced to about 69% after autoclaving for 50 min and 73% after autoclaving for 50 min and microwaving for 5 min. In addition, gliadin bands in the 50 min autoclaved group disappeared in both SDS-PAGE and immunoblotting. On the other hand, the antigenicity of gliadin was unaffected by microwaving alone. Consequently, there were no considerable changes in using an autoclave alone or in combination with a microwave. These results suggest that autoclaving may affect the reduction of the antigenicity of gliadin in medium wheat flour.

가압가열 및 microwave에 의한 중력분 반죽 gliadin의 항원성 변화

곽지희(Ji-Hee Kwak),김꽃봉우리(Koth-Bong-Woo-Ri Kim),이청조(Chung-Jo Lee),김민지(Min-Ji Kim),김동현(Dong-Hyun Kim),선우찬(Chan Sunwoo),정슬아(Seul-A Jung),김현지(Hyun-Jee Kim),최정수(Jung-Su Choi),김성원(Seong-Won Kim),안동현(Dong-Hyun 한국식품과학회 2012 한국식품과학회지 Vol.44 No.1

본 연구에서는 가압가열 및 microwave 처리에 의한 중력분 반죽 추출물 내의 gliadin 단백질의 항원성 변화에 대해 살펴보았다. 중력분 반죽에 가압가열과 microwave를 단독 또는 병행으로 처리하여 ci-ELISA, SDS-PAGE 및 immunoblotting을 실시하였으며, 가압가열 처리에 의해서 anti-gliadin IgG 항체와 gliadin과의 결합력이 다소 감소한 것을 확인하였다. 특히 30 min 이상 처리시 더욱 감소한 것으로 나타났으며, SDS-PAGE와 immunoblotting 결과에서도 gliadin band의 강도가 약해지고 항체와의 반응도 나타나지 않았다. Microwave 처리의 경우, 5 min 이상 처리시 일부 gliadin 단백질의 소실이 관찰되었으나, 항원성에는 큰 변화가 없었다. 또한 가압가열 및 microwave 병행 처리에 의해 항원-항체 결합력이 더욱 감소되었으며, 특히 가압가열 50 min, microwave 10 min 처리시 약 35.0%로 감소되었다. 이상의 결과를 통해 가압가열 처리에 의해 중력분 반죽 추출물 내 gliadin의 항원성이 감소되는 것을 확인하였으며, microwave와 병행 처리하는 경우, 더욱 감소하는 것을 확인하였다. The aim of this study was to determine the optimal physical treatment to reduce the antigenicity of gliadin in wheat dough. Medium wheat dough was treated with an autoclave (5, 10, 30, and 50 min at 121℃, 1 atm), a microwave (1, 5, and 10 min) or both (10, 30, and 50 min/5, 10 min). The proteins in the dough extracts were analyzed by SDS-PAGE and the binding ability of anti-gliadin IgG to gliadin was examined by ci-ELISA and immunoblotting. Results showed that the ability of anti-gliadin IgG to bind to gliadin in wheat dough treated with an autoclave alone or in combination with a microwave was decreased. Especially, it declined to ~77% after autoclaving for 30 min and 35% after both autoclaving for 50 min and microwaving for 5 min. In addition, the intensity of gliadin bands in SDS-PAGE were weakened and anti-gliadin IgG did not recognize gliadin in immunoblotting. However, microwaving alone did not affect the antigenicity of gliadin in wheat dough. These results indicate that autoclaving may affect the reduction of the antigenicity of gliadin in medium wheat dough. Moreover, autoclaving in combination with microwaving is more effective for reducing the antigenicity of wheat dough.

가압가열 및 Microwave 처리가 생면의 품질에 미치는 영향

박시우,김꽃봉우리,김민지,강보경,박원민,김보람,박홍민,최정수,최호덕,안동현,Bark, Si-Woo,Kim, Koth-Bong-Woo-Ri,Kim, Min-Ji,Kang, Bo-Kyeong,Pak, Won-Min,Kim, Bo-Ram,Park, Hong-Min,Choi, Jung-Su,Choi, Ho-Duk,Ahn, Dong-Hyun 한국식품영양학회 2013 韓國食品營養學會誌 Vol.26 No.4

중력분을 이용하여 제면한 후 가압가열, microwave 및 가압가열과 microwave 병행 처리한 후, 생면 및 삶은 면의 품질에 미치는 영향에 대하여 알아보았다. 생면의 pH는 microwave 1 min 처리구에서 무처리구와 유의적인 차이를 보이지 않았으며, 수분 함량은 autoclave 50 min 처리구에서 무처리구와 유의적인 차이를 보이지 않았고, 그 외의 처리구에서는 모두 수분 함량이 감소함을 확인하였다. 면의 색도 측정 결과는 명도는 무처리구에 비해 모든 처리구에서 감소하였으며, 적색도는 microwave 1 min 처리구는 감소한 반면, 나머지 처리구는 증가하였다. 황색도는 autoclave 50 min 처리구와 autoclave 50 min/microwave 1 min 병행 처리구에서 증가한 반면, 나머지 물리적 처리구에서는 감소하였다. 삶은 면의 색도에서는 명도, 적색도, 황색도 모두에서 무처리구에 비하여 물리적 처리구에서 증가한 값을 나타내었다. 물성 측정 결과는 경도, 부착성, 응집성, 검성, 복원성에서 무처리구와 비교시 microwave 1 min 처리구는 유의적으로 감소하였으며, 그 외 처리구에서는 유의적으로 증가한 값을 나타내었다. 탄력성과 전단력은 모든 처리구에서 유의적으로 증가하였으며, 인장력은 가압가열 30 min 처리구와 무처리구가 유의적인 차이를 보이지 않았으나, 나머지 물리적 처리구에서는 유의적으로 증가하였다. 관능 평가 결과는 생면의 경우 색 항목에서 물리적 처리구들이 유의적으로 낮은 점수를 받았다. 맛, 질감, 향 항목에서는 무처리구와 물리적 처리구간 유의적 차이를 보이지 않았다. 전체적인 기호도에서는 microwave 1 min 처리구가 가장 높은 점수를 얻었으며, 가압가열(50 min)과 microwave(1 min) 병행 처리구는 무처리구와 비슷한 점수를 얻었다. 따라서 제면 후 가압가열 및 microwave 처리가 생면 및 삶은 면에 있어서 색과 질감 항목을 보완, 개선시킨다면 알러겐성이 저감화된 면을 제품화하는데 적합할 것으로 사료되어진다. This study was conducted to determine the effects of physical treatments for quality of wet noodles. Noodles were being tried with a microwave (for 1 min), an autoclave (for 30 or 50 min), and both autoclave and microwave (for 30/1 min or 50/1 min). The results showed that the pH levels were slightly decreased after treatments of autoclave and autoclave/microwave. The moisture contents were considerably decreased as compared to the control except autoclave (50 min). After all treatments, the lightness was decreased in all samples, but, redness was increased (except microwave) and the yellowness was increased after autoclave (50 min) and autoclave/microwave (50/1 min). Texture was increased as compared to the control except microwave. In the sensory evaluation, the noodles treated with microwave, autoclave (50 min), and autoclave/ microwave (50/1 min) showed a high score in overall preference. From these results, both the autoclave and microwave methods can be applied to the wet noodles without diminishing its quality to a great extent.

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.

2010년도 국내 임상에서 분리한 다제내성 녹농균의 유전자형 조사

김민지,차민경,이도경,강주연,박재은,김영희,박일호,신혜순,하남주,Kim, Min Ji,Cha, Min Kyeong,Lee, Do Kyung,Kang, Ju Yeon,Park, Jae Eun,Kim, Young Hee,Park, Il Ho,Shin, Hea Soon,Ha, Nam Joo The Microbiological Society of Korea 2012 미생물학회지 Vol.48 No.4

녹농균은 특히 면역이 저하된 환자에게서 심각한 감염을 일으키는 그람음성의 기회감염 균주이다. 또한 carbapenem 내성 metallo-${\beta}$-lactamases (MBL)를 가진 녹농균이 한국에서 증가되는 추세로 보고되고 있다. 따라서 본 실험에서는 2차 병원인 삼육 서울 병원에서 수집된 총 92종의 임상 녹농균의 다재내성 수준을 분석하였다. 항생제에 대한 감수성은 최소억제농도(MIC) 분석에 의해 결정되었고, inhibitor-potentiated disk diffusion(IPD) 분석은 MBL 검출을 위해 수행되었다. RAPD-PCR은 임상환자에서 분리한 녹농균 계통의 유전적 유형의 특징을 밝히기 위해 사용되었다. 그 결과 임상에서 분리된 녹농균의 40.2%는 ceftazidime에 내성을, 58.7%는 meropenem에 내성을, 56.5%는 gentamicin에 내성을, 46.7%는 tobramycin에 내성을, 62.0%는 ciprofloxacin에 내성을 그리고 97.8%는 chloramphenicol에 내성을 보였다. IPD 분석에 의해 29종의 다재내성 균주로 관찰 되었고, RAPD 분석에 의해 19종은 IPM-1 유전자형을, 2종은 VIM-2 유전자형을 만들었다. MBL 유전자 검출 시험을 통해 19종의 IMP-1 생성 녹농균 중에서 16종이 유사한 유전자형을 보였고, 3종은 다른 유전자형이 관찰되었다. 임상에서 분리한 IMP-1 생성 다재내성 녹농균의 비율은 꾸준히 증가하고 있다. 이번 연구는 2010년 국내 임상에서 분리한 녹농균의 항생제 다제내성 패턴과 유전자형에 대한 정보를 제공한다. Pseudomonas aeruginosa is an opportunistic Gram-negative bacterium that causes serious infection, particularly in immunocompromised patients. Also, P. aeruginosa possessing carbapenem-resistant metallo-${\beta}$-lactamases (MBL) has been reported with increasing frequency in Korea. We therefore analyzed the level of multidrug-resistant clinical P. aeruginosa isolated from a secondary hospital in Korea in 2010. A total of 92 isolates of P. aeruginosa were collected from Sahmyook Medical Center in 2010. Susceptibility to antimicrobial agents was determined by analysis of the minimum inhibitory concentration test; the inhibitor-potentiated disk diffusion (IPD) test was performed for MBL detection. RAPD-PCR was used for genotyping to rapidly characterize P. aeruginosa strains isolated from clinical patients. The percentages of non-susceptible isolates were as follows: 40.2% to ceftazidime, 58.7% to meropenem, 56.5% to gentamicin, 46.7% to tobramycin, 62.0% to ciprofloxacin and 97.8% to chloramphenicol. The 29 multidrug-resistant strains were screened by the IPD test: of the 21 PCR-positive isolates, 19 were IPM-1 producers and 2 were VIM-2 producers. Among the 19 IMP-1-producing P. aeruginosa isolates, 16 isolates showed similar patterns, and three different banding patterns were observed. The proportion of IMP-1-producing multidrug-resistant P. aeruginosa from clinical isolates steadily increased in this secondary hospital in Korea in 2010. This study provides information about the antimicrobial-resistant patterns and genotype of multidrug-resistant P. aeruginosa isolated from clinical isolates in Korea, 2010.

Eucheuma spinosum으로부터 다양한 효모를 이용한 바이오에탄올 생산

김민지(Min-Ji Kim),김정수(Jung-Soo Kim),라채훈(Chae Hun Ra),김성구(Sung-Koo Kim) 한국생물공학회 2013 KSBB Journal Vol.28 No.5

Ethanol fermentations were performed using separate hydrolysis and fermentation (SHF) processes with monosaccharides from pretreated seaweed, Eucheuma spinosum as the biomass. The pretreatment was carried out with 11% (w/v) seaweed slurry and 150 mM H₂SO₄ at 121℃ for 40 min. Enzyme hydrolysis after H₂SO₄ pretreatment was performed with Celluclast 1.5 L at 45℃ for 24 h. Five % active charcoal were added to hydrolysate to removed 5-hydroxy methylfurfural. Ethanol fermentation with 11% (w/v) seaweed hydrolysate was performed for 72~96 h using Kluyvermyces marxianus, Pichia stipits, Saccharomyces cervisiae and Candida tropicalis. Ethanol concentration was reached to 18 g/L by K. marxianus, 16 g/L by P. stipitis, 15 g/L by S. cerevisiae and 10 g/L by C. tropicalis, respectively. The ethanol yield from total monosugar was obtained 0.50 and ethanol productivity was obtained 0.38 g/L/h by K. marxianus.

정신과 의사와 비정신과 의사의 항우울제 처방에 대한 연구 : 건강보험심사평가원 청구 데이터 중심으로

김민지,김남우,신다운,이상진,박형근,김혜영,양보람,안용민,Kim, Min Ji,Kim, Namwoo,Shin, Daun,Rhee, Sang Jin,Park, C. Hyung Keun,Kim, Hyeyoung,Yang, Boram,Ahn, Yong Min 대한생물정신의학회 2019 생물정신의학 Vol.26 No.2

Antidepressants are widely used to treat depression in Korea, however, only a few studies have focused on the provider of the treatment. The aim of the study is to compare the differences between patients who were prescribed antidepressants by psychiatrists and those who were prescribed antidepressants by non-psychiatrists in South Korea. Patients with a diagnosis of depressive disorder who had been newly prescribed antidepressants in 2012 were selected from the Health Insurance Review and Assessment Service database. They were classified into two groups depending on whether they received the antidepressant prescription from a psychiatrist or non-psychiatrist. Sociodemographic, clinical, and depression related cost has been investigated. Treatment resistant depression, which is defined as a failure of two antidepressant regimens to alleviate symptoms, was also investigated. Prescription adequacy was assessed based on whether a regimen was maintained for at least 4 weeks. Among the 834694 patients with pharmaceutically treated depression (PTD) examined in this study, 326122 (39.1%) were treated by psychiatrists. Patients who were treated by psychiatrists were younger and had more psychiatric comorbidities than those treated by non-psychiatrists. They had longer PTD duration (229.3 days vs. 103.0 days, p < 0.05) and a larger proportion of treatment resistant depression (9.3% of PTD) when compared to those patients treated by non-psychiatrists. The patients treated by psychiatrists had a smaller proportion of inadequate antidepressant use compared to those patients in the non-psychiatrist group (44.5% vs. 65.1%, p < 0.05). The costs related to depression corrected with PTD duration were higher in the non-psychiatrist group (32214 won vs. 56001 won, p < 0.05). Patients who receive antidepressants from psychiatrists are patients with more severe, treatment-resistant depression. Psychiatrists prescribe antidepressants more adequately and cost- effectively than non-psychiatrists.

함산소불화 활성탄소섬유를 이용한 저농도 크롬이온의 흡착 특성

김민지 ( Min Ji Kim ),정민정 ( Min Jung Jung ),최석순 ( Suk Soon Choi ),이영석 ( Young Seak Lee ) 한국공업화학회 2015 공업화학 Vol.26 No.4

In this work, activated carbon fibers (ACFs) were oxyfluorinated and their adsorption ability for the low concentration of hexavalent chromium in an aqueous solution was investigated. The pore structure and surface properties of ACFs were examined by BET and X-ray Photoelectron Spectroscopy (XPS), respectively. Due to the oxyfluorination treatment, the content of (C-O) bond on ACFs surface which influences the adsorption capacity for heavy metal ions increased largely, resulting that Cr6+ adsorption equilibrium reached quickly within 10 min. In addition, the maximum removal efficiency at the initial Cr6+ concentration of 20 ppm was observed, which is a 100% improvement compared to that of non-treated ACFs. These results suggest that the oxyfluorination of ACFs can be applied as a good surface treatment for the effective adsorption of the low concentration of Cr6+.

마이크로파 정제에 의한 액정방사용 단일벽 탄소나노튜브의 제조 및 특성

김민지,이동주,구본철,유기현,김대윤,김남동,Kim, Min Ji,Lee, Dongju,Ku, Bon-cheol,Ryu, Ki-Hyun,Kim, Dae-Yoon,Kim, Nam Dong 한국섬유공학회 2021 한국섬유공학회지 Vol.58 No.3

Carbon nanotube fibers (CNTFs) have attracted wide attention owing to their exceptional lightness, electrical conductivity, and mechanical flexibility that make them potential components for applications including carbon composites, nanoelectronics, and optics. CNTFs have been successfully fabricated from carbon nanotubes (CNTs) by liquid-crystal spinning. This spinning method requires low-defect CNTs to form a liquid crystalline phase for making highly-oriented CNTFs. In this study, we conducted microwave purification to effectively remove impurities from CNTs, such as residual metallic catalyst and carbon-based impurities, that are formed during CNT synthesis. We fabricated single-walled carbon nanotube fibers (SWCNTFs) using liquid-crystal spinning purified single-walled carbon nanotubes (SWCNTs) to examine the effect of SWCNTs on the liquid crystal phase and resultant fibers. In conclusion, this method removed impurities from SWCNTs and increased the oxygen-containing functional groups in the SWCNTs, which are capable of forming a liquid crystal phase, thereby enhancing the mechanical performance of fibers.

Saccharina japonica를 이용한 전처리 및 분리당화발효와 동시당화발효로부터 에탄올 생산

김민지(Min-Ji Kim),김성구(Sung-Koo Kim) 한국생물공학회 2012 KSBB Journal Vol.27 No.2

Ethanol fermentations were carried out using simultaneous saccharification and fermentation (SSF) and separated hydrolysis and fermentation (SHF) processes with monosaccharides from seaweed, Saccharina japonica (sea tangle, Dasima) as the biomass. The pretreatment was carried out by thermal acid hydrolysis with H₂SO₄ or HCl. Optimal pretreatment condition was determined at 10% (w/v) seaweed slurry with 37.5 mM H₂SO₄ at 121℃ for 60 min. To increase the yield of saccharfication, isolated marine bacteria Bacillus sp. JS-1 was used and 48 g/L of reducing sugar were produced. Ethanol fermentation was performed using SSF and SHF process with Pachysolen tannophilus KCTC 7937. The ethanol concentration was 6.5 g/L by SSF and 6.0 g/L by SHF.