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습식텍스쳐를 이용한 단결정 실리콘 광학적 · 전기적 특성 연구
한규민(Han Kyu-min),유진수(Yoo Jin-su),유권종(Yoo Kwon-jong),이희덕(Lee Hi-deok),최성진(Choi Sung-jin),권준영(Kwon Jun-young),이준신(Yi Jun-sin) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
The presence of ultrasonic wave in caustic cleaning process enhances the remove pollutants, and more homogeneous, textured structure. The silicon wafers, cleaning in Deconex OF 145 solution (0.5~2wt %) with DIW under ultrasonic environment for 5 min. The presence of uniform thin layer of SiO2 on c-Si surface enhances etching rate in the caustic etching mixture solution of NaOH (1.5 wt %), DI water and IPA (6 wt %) at 90℃ for 20 min and results in a fine, more homogeneous and small textured structure.
팽이버섯 재배 현장에서 Listeria monocytogenes의 성장을 억제하기 위한 살균 처리 기술 개발
박경민,이수빈,정도영,최송이,황인준,김세리,Kyung Min Park,Su-Bin Lee,Do-Young Jung,Song-Yi Choi,Injun Hwang,Se-Ri Kim 한국식품위생안전성학회 2023 한국식품위생안전성학회지 Vol.38 No.6
본 연구는 팽이버섯 생산현장에서 사용하는 권지 접착포에서 팽이버섯으로 Listeria monocytogenes 교차오염을 예방하기 위하여 화학적 살균제에 의한 L. monocytogenes 저감 효과를 확인하였다. 과산화초산, 미산성전해수, 이산화염소수, 차아염소산나트륨을 10분간 처리했을 때 권지표면에 부착된 L. monocytogenes를 최대 99.99% 이상 저감화시켰고, 이들 4종의 살균소독제는 팽이버섯 유기물 존재 여부에 관계없이 높은 살균능을 보이므로 권지의 세척소독에 활용가능성이 있음을 확인하였다. 특히 과산화초산은 권지 접착포 거친면과 부드러운면 모두에서 L. monocytogenes를 99.999% 이상 감소시킬 수 있으므로 팽이버섯 권지 세척시 30mg/L 이상의 과산화초산에 30분 이상 침지한 후 사용하면 권지에 오염된 L. monocytogenes의 교차오염을 예방할 수 있을것으로 사료된다. The consumption of enoki mushrooms has been associated with cases of listeriosis produced by Listeria monocytogenes, highlighting the significance of sanitizing food-contact surface, such as the velcro used in welding processing of enoki mushrooms, to ensure microbial safety. We investigated the inhibitory activity of nine chemical disinfectants at regular concentrations against L. monocytogenes isolated from a mushroom farm environment. The bacterial suspension was prepared in phosphate buffered saline and mushroom extract broth and inoculated onto the velcro surface. After inoculation, most disinfectants reduced the initial 8 log CFU/coupon concentration by less than 2 log CFU/coupon during a 5-min treatment. Slightly acidic hypochlorous water showed a reduction of approximately 4 log CFU/coupon when tested for more than 30 min at the maximum allowable concentration of 200 mg/L. Sodium hypochlorite solution showed a reduction of approximately 5 log CFU/coupon when used at 100 mg/L for 60 min. Peracetic acid, at the maximum allowable concentration of 300 mg/L, showed the most effective reduction of 5 log CFU/coupon or more when the surface was treated with 37.5 mg/L for 30 min. These results indicate that peracetic acid can be used as the disinfectant strategy to control cross-contamination of L. monocytogenes on the velcro surface of plastic wrappers used in the welding processing of enoki mushrooms.
허근,이수진,신억섭,박종민 영남대학교 약품개발연구소 1996 영남대학교 약품개발연구소 연구업적집 Vol.6 No.-
Gastrodia elata is a medicinal plant which has been used as anticonvulsant in Korea, Japan and China. This study was conducted to examine the action mechanism of Gastrodia elata centering around the change of GABA and glutamic acid level in brain while observing the anticonvulsive effect in PTZ-induced seizure model Seizures were reduced effectively by pretreatment of ether soluble part of methanol extract of, Gastrodia elata. The pretreatment of ether soluble part inhibited not only the decreses of brain GABA level but also the increase of brain glutamic acid level observed in PTZ model of convulsive dose. Although there was not any change in glutamic acid level, the same development was also observed in the model of subconvulsive dose. From above results, it seems that the anticonvulsive component of Gastrodia elata is lipophilic, and its action mechanism is originated from both control action of GABA level and inhibition of glutaminergic neurotransmission.
활동이론의 관점에서 바라본 박물관, 커뮤니케이션, 그리고 학습
박지연,이수민,이병준 한국문화교육학회 2011 문화예술교육연구 Vol.6 No.4
Museum is a medium which communicates with previous generation's experiential memories and present generation's cultural memories. Therefore, the communication is a core task in museum. Museum needs mediums like exhibition and education and we have to discuss how to structuralize these things. The museum communication could be explained through the Cultural-Historical Activity Theory(CHAT). The CHAT has been developed by several theorists like Vygotsky. Especially, the third generation's CHAT has been developing by Engeström. It is a worthy theoretical structure that can show museum as a messenger of communication in society and its communication problems. This study is based on the CHAT and analyzes museum in a social activity system and activity system in a museum from micro/macro-scopic view. Also, it produces practical models that connect museum with community art field and museum with schools. 박물관은 앞선 세대의 체험적 기억을 현 세대에게 문화적 기억의 형태로 커뮤니케이션하는 매개체이다. 따라서 박물관에서 소통(communication)이라는 개념은 핵심적인 과제일수 밖에 없다. 박물관은 그 자체로 전시와 교육과 같은 매체(medium)를 필요로 하며 이를 어떻게 구조화할 것인가의 문제가 박물관커뮤니케이션의 측면에서 논의될 필요가 있다. 이러한 거시적, 미시적 차원의 박물관커뮤니케이션의 과제는 비고츠키와 여러 이론가들의 연구성과를 정리하고 발전시킨 활동이론에 의해 잘 설명될 수 있을 것으로 보인다. 특히 Y. Engeström에 의해 발전된 제3세대 활동이론은 사회속에서의 커뮤니케이션의 전달자로서의 박물관과 박물관내에서의 커뮤니케이션의 문제를 잘 드러낼 수 있는 이론체계라고 생각된다. 본 연구는 활동이론에 근거하여 거시적·미시적 관점에서 사회활동시스템 속에서의 박물관과 박물관 내에서의 활동시스템을 분석하고 이를 통해 박물관의 커뮤니케이션을 박물관 내부 활동시스템 간의 네트워크 실천, 박물관과 지역의 예술장(藝術場)이 연계된 네트워크 실천과 박물관과 학교가 연계된 네트워크 실천 모형을 구조화하여 제시하려 한다.
Lee, Boyoung,Park, Yong-Soon,Yi, Hwe-Su,Ryu, Choong-Min The Korean Society of Plant Pathology 2013 Plant Pathology Journal Vol.29 No.3
Plants protect themselves from diverse potential pathogens by induction of the immune systems such as systemic acquired resistance (SAR). Most bacterial plant pathogens thrive in the intercellular space (apoplast) of plant tissues and cause symptoms. The apoplastic leaf exudate (LE) is believed to contain nutrients to provide food resource for phytopathogenic bacteria to survive and to bring harmful phytocompounds to protect plants against bacterial pathogens. In this study, we employed the pepper-Xanthomonas axonopodis system to assess whether apoplastic fluid from LE in pepper affects the fitness of X. axonopodis during the induction of SAR. The LE was extracted from pepper leaves 7 days after soil drench-application of a chemical trigger, benzothiadiazole (BTH). Elicitation of plant immunity was confirmed by significant up-regulation of four genes, CaPR1, CaPR4, CaPR9, and CaCHI2, by BTH treatment. Bacterial fitness was evaluated by measuring growth rate during cultivation with LE from BTH- or water-treated leaves. LE from BTH-treatment significantly inhibited bacterial growth when compared to that from the water-treated control. The antibacterial activity of LE from BTH-treated samples was not affected by heating at $100^{\circ}C$ for 30 min. Although the antibacterial molecules were not precisely identified, the data suggest that small (less than 5 kDa), heat-stable compound(s) that are present in BTH-induced LE directly attenuate bacterial growth during the elicitation of plant immunity.
공정단위장치로부터의 휘발성유기화합물질의 비산 배출량 산정
박영근,문정우,고민수,박현수,차순우,이선우,홍승철,김화용,이종협 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.3
공장내 설치되어 있는 수천개의 비산배출원으로부터 배출되는 VOCs의 양을 산정하기 위해서는 많은 비용과시간이 소요된다. 이러한 노력을 줄이기 위하여 전산모사방법을 이용하여 배출량을 예측하는 방법을 제시하였다. 예측된 값의 검증을 위하여 밸브, 플랜지 등의 비산배출원으로 구성되어 있는 실험장치를 고안하고 내부를 흐르는 유체의 종류 및 조건에 따른 배출량을 백포집법에 의해 샘플링하여 GC로 분석한 후, 분석된 데이터를 전산모사를 통해 얻은 결과와 비교하였다. 그 결과, 전산모사를 이용하여 밸브, 플랜지, 개방식라인으로부터 배출되는 벤젠과 톨루엔의 양을 예측할 수 있었다. Considerable effort and expense have been devoted to the estimation and acquisition of the amounts of VOCs relesed thousands of the fugitive emission sources installed in chemical processes. In order to reduce the effort required on the estimation of VOC release, a methodology using a computational fluid dynamics (CFD) was proposed. The estimated values were compared the experimental data obtained using a designed experimental apparatus that was composed of fugitive emission sources such as valves, pump, and flange. The emissions were sampling tedlar bags for a variety of volatile compounds at different pressures. The components were analyzed by a portable gas chromatograph. In conclusion, the amount of benzene and toluene released from fugitive emission sources could be successfully estimated using the CFD technique.
The anti-allergy and anti-inflammatory effect of Anemarrhenae Rhizoma in vivo and in vitro
Kim, Su-Jin,Jeong, Hyun-Ja,Myung, Noh-Yil,Moon, Phil-Dong,Lee, Ju-Young,Yi, Byoung-Jae,Lee, Eun-Hyub,An, Nyeon-Hyung,Park, Seok-Jae,Kim, Min-Cheol,Jun, Suk-Min,Lee, Ji-Hyun,Kim, Hyung-Min,Hong, Seung- Kyung Hee Oriental Medicine Research Center 2007 Oriental pharmacy and experimental medicine Vol.7 No.3
Anemarrhenae Rhizoma (AR) is used in traditional oriental medicine for various medicinal purposes. However, the exact mechanism that accounts for the anti-allergy and anti-inflammatory effects of the AR is still not fully understood. The aim of The present study is to elucidate whether and how AR modulates the allergic reactions in vivo, and inflammatory reaction in vitro. In this study, we showed that AR significantly decreased compound 48/80-induced systemic anaphylaxis, paw oedema, and histamine release from preparation of rat peritoneal mast cells. Also, AR inhibited the expression of inflammatory cytokine in PMA plus A23187-stimulated human mast cells (HMC-1). In addition, we showed that anti-inflammatory mechanism of AR is through suppression of nuclear factor-${\kappa}B$ activation $I{\kappa}B-{\alpha}$degradation. These results provided new insight into the pharmacological actions of AR as a potential molecule for therapy of inflammatory allergic diseases.