Enzymatic Bleaching of Desized Cotton Fabrics with Hydrogen Peroxide Produced by Glucose Oxidase

Shin, Youngseob,Hwang, Sangpill,Ahn, Ik-sung 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.4

The feasibility of cotton-bleaching with enzymatically produced hydrogen peroxide (H₂O₂) was investigated in this study. Glucose oxidase (GOD), catalyzing the generation of H₂O₂ from glucose oxidation, was used as a model enzyme. When 0.1 M glucose solutions were treated in order to achieve the production of H₂O₂ to 0.1% (w/w) enough for cotton-bleaching, the reaction was found to be limited by oxygen supply rates. Also, the remaining glucose caused the develo㎛ent of yellow color in cotton bleaching. When the initial concentration of glucose was reduced to 0.05 M, and the oxygen was supplied at 1.0 L O₂ /min, the levels of H₂O₂ were maintained at about 0.07% (w/w), and the concentration of the remaining glucose was negligibly low. In bleaching desized cotton fabrics, the whiteness level obtained with enzymatically produced H₂O₂ (0.07% (w/w)) was comparable to that with commercially available H₂O₂ (0.1% (w/w)).

스마트시티 통합플랫폼의 서비스 도입 문제점과 지표 개발의 필요성

신영섭(YoungSeob Shin),나영우(YoungWoo Na),최병길(ByoungGil Choi) 대한공간정보학회 2020 한국지형공간정보학회 학술대회 Vol.2020 No.6

Enzymatic Bleaching of Desized Cotton Fabrics with Hydrogen Peroxide Produced by Glucose Oxidase

안익성,Youngseob Shin,Sangpill Hwang 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.4

Spatial Pattern and Association of Tree Species in a Mixed Abies holophylla-Broadleaved Deciduous Forest in Odaesan National Park

Kyungeun Lee,Soyoung Kim,Youngseob Shin,정연숙 한국식물학회 2012 Journal of Plant Biology Vol.55 No.3

The mixed Abies holophylla-broadleaved deciduous forest is mature relative to other forest types in the midland of South Korea. The spatial distribution patterns of eight dominant canopy tree species were analyzed using Ripley’s K function. This study was conducted to clarify interspecific and intraspecific associations among growth stages and to interpret the coexistence mechanism among such species, by extension, to forecast their future. Disturbance-driven site heterogeneity has spatially separated disturbance-resistant Magnolia sieboldii from the other seven species. Spatial distribution of other species is affected by dispersal mechanisms and interspecific and intraspecific competition. These species were classified into three groups. The first group, composed of A. holophylla, Tilia amurensis, Acer pseudo-sieboldianum, and Quercus mongolica,was the most dominant and intraspecifically affinitive. Additionally, it seemed that they were established before the others. Q. mongolica and T. amurensis are poorly resistant to shade and are likely to be crowded out. In contrast, the other two species may continue, as they are highly resistant to shade and have high reproductivity. The second group was composed of Carpinus cordata, Acer tegmentosum, and Acer mono, i.e., latesuccessional species that wait for chances with shade tolerance and high reproductivity. These species are expected to occupy much of the Q. mongolica and T. amurensis space. M. sieboldii,i.e., the third group, were negatively related with other species and have dominated the valleys where intense disturbances are repeated. Understories have poor reproductivity, but a stationary population is expected to be maintained if canopy gaps are created by occasional disturbances.

Feasibility of normal tissue dose reduction in radiotherapy using low strength magnetic field

Jung, Nuri Hyun,Shin, Youngseob,Jung, In-Hye,Kwak, Jungwon The Korean Society for Radiation Oncology 2015 Radiation Oncology Journal Vol.33 No.3

Purpose: Toxicity of mucosa is one of the major concerns of radiotherapy (RT), when a target tumor is located near a mucosal lined organ. Energy of photon RT is transferred primarily by secondary electrons. If these secondary electrons could be removed in an internal cavity of mucosal lined organ, the mucosa will be spared without compromising the target tumor dose. The purpose of this study was to present a RT dose reduction in near target inner-surface (NTIS) of internal cavity, using Lorentz force of magnetic field. Materials and Methods: Tissue equivalent phantoms, composed with a cylinder shaped internal cavity, and adjacent a target tumor part, were developed. The phantoms were irradiated using 6 MV photon beam, with or without 0.3 T of perpendicular magnetic field. Two experimental models were developed: single beam model (SBM) to analyze central axis dose distributions and multiple beam model (MBM) to simulate a clinical case of prostate cancer with rectum. RT dose of NTIS of internal cavity and target tumor area (TTA) were measured. Results: With magnetic field applied, bending effect of dose distribution was visualized. The depth dose distribution of SBM showed 28.1% dose reduction of NTIS and little difference in dose of TTA with magnetic field. In MBM, cross-sectional dose of NTIS was reduced by 33.1% with magnetic field, while TTA dose were the same, irrespective of magnetic field. Conclusion: RT dose of mucosal lined organ, located near treatment target, could be modulated by perpendicular magnetic field.

Feasibility of normal tissue dose reduction in radiotherapy using low strength magnetic field

Nuri Hyun Jung,Youngseob Shin,In-Hye Jung,Jungwon Kwak 대한방사선종양학회 2015 Radiation Oncology Journal Vol.33 No.3

Purpose: Toxicity of mucosa is one of the major concerns of radiotherapy (RT), when a target tumor is located near a mucosal lined organ. Energy of photon RT is transferred primarily by secondary electrons. If these secondary electrons could be removed in an internal cavity of mucosal lined organ, the mucosa will be spared without compromising the target tumor dose. The purpose of this study was to present a RT dose reduction in near target inner-surface (NTIS) of internal cavity, using Lorentz force of magnetic field. Materials and Methods: Tissue equivalent phantoms, composed with a cylinder shaped internal cavity, and adjacent a target tumor part, were developed. The phantoms were irradiated using 6 MV photon beam, with or without 0.3 T of perpendicular magnetic field. Two experimental models were developed: single beam model (SBM) to analyze central axis dose distributions and multiple beam model (MBM) to simulate a clinical case of prostate cancer with rectum. RT dose of NTIS of internal cavity and target tumor area (TTA) were measured. Results: With magnetic field applied, bending effect of dose distribution was visualized. The depth dose distribution of SBM showed 28.1% dose reduction of NTIS and little difference in dose of TTA with magnetic field. In MBM, cross-sectional dose of NTIS was reduced by 33.1% with magnetic field, while TTA dose were the same, irrespective of magnetic field. Conclusion: RT dose of mucosal lined organ, located near treatment target, could be modulated by perpendicular magnetic field.

미취학 어린이에서 음파 칫솔과 일반 칫솔의 효과

신영섭,이효설,송제선,이제호,Shin, Youngseob,Lee, Hyoseol,Song, Jeseon,Lee, Jaeho 대한소아치과학회 2016 大韓小兒齒科學會誌 Vol.43 No.4

본 연구의 목적은 $L{\ddot{o}}e$ & Silness의 치태지수를 사용하여 음파 칫솔과 일반 칫솔의 효과를 비교하는 것이다. 연세대학교 치과대학병원 소아치과에 내원한 전신질환이 없는 3-6세 어린이 34명을 대상으로 교차설계, 연구자에 대한 눈가림법을 사용한 무작위 대조군 연구가 진행되었다. 연구 참여자는 2개의 군으로 무작위로 나누어져 음파 칫솔과 일반 칫솔을 번갈아 2주씩 사용하였고, 칫솔질 전후 구강위생상태를 $L{\ddot{o}}e$ & Silness의 치태지수를 사용하여 측정하여 차이를 비교하였다. 음파 칫솔 사용 후 $0.26{\pm}0.28$, 일반 칫솔 사용 후 $0.09{\pm}0.22$의 치태지수 감소를 보였고, 이는 통계학적으로 유의한 차이를 보였다(p < 0.05). 성별과 나이에 따른 음파 칫솔의 치태 제거 효과는 통계학적으로 유의한 차이를 보이지 않았다(p > 0.05). 연구 결과, 3-6세 어린이에서 음파 칫솔이 일반 칫솔에 비해 치태 제거 효과는 좋았고, 성별과 연령에 따른 치태 제거 효과의 차이는 나타나지 않았다. The purpose of this study is to compare the effectiveness of sonic and manual toothbrushes using the $L{\ddot{o}}e$ and Silness plaque index (PI). This was an examiner-blind, randomized study with a cross-over design. A total of 34 children (17 males and 17 females) aged 3-6 years were included. Subjects were randomly assigned to two groups: one group used the sonic brush for two weeks before using the manual brush for two weeks, while the other group used the manual brush for two weeks followed by the sonic brush. During each dental visit, plaque indices were recorded and compared to baseline. The results were analyzed using a paired t-test or Pearson correlation test (${\alpha}=0.05$). Thirty children (mean age 4.37 years) complied with the protocol and completed the study. The PI score was 0.09 lower compared to baseline after using a manual toothbrush and 0.26 lower after using the sonic brush. The reduction was statistically significantly greater in the sonic group (p < 0.05). In conclusion, the sonic toothbrush is more effective for reducing plaque than a manual toothbrush.

시민인식조사를 통한 CCTV 보조시설물의 도시공간 방범효과분석 연구

최우철 ( Woochul Choi ),나준엽 ( Joonyeop Na ),신영섭 ( Youngseob Shin ) 한국공간디자인학회 2019 한국공간디자인학회논문집 Vol.14 No.7

(연구배경 및 목적) 오늘날의 CCTV는 단순히 영상을 수집하는데 그치지 않고 비상벨, LED 안내판, 바닥그림자, 범죄예방을 위한 환경설계 디자인(CPTED) 등 CCTV 보조시설물들과 함께 실시간 범죄에 대응하고 자연감시 역할을 하는 등 도시공간에서의 범죄예방효과를 향상시키는 역할까지 도맡고 있다. 하지만 이러한 CCTV 보조시설물들은 CCTV의 주기능인 영상정보 수집 목적에 더하여 방범효과를 높이기 위한 보완적인 설치물로서 지자체의 예산상황에 따라서 설치가 되지 않는 경우도 많은 편이다. (연구방법) 본 연구는 CCTV 보조시설물이 도시공간 방범에 끼치는 효과를 분석하기 위해 비상벨, LED 안내판, 고보조명, CPTED 디자인이 포함되어 CCTV 15개소가 설치된 안양시 인덕원지역(관양 2동)을 테스트베드로 설정하였다. 해당 테스트베드에 시민 설문조사를 통해 CCTV 보조시설물에 대한 인지 정도 및 안전 체감도, 해당구역에 설치된 CCTV 보조시설물이 범죄예방에 기대되는 효과, CCTV 보조시설물 간 상대적 중요도 분석을 수행하였다. 이를 통해 지자체 의사결정 지원방안, 지능형방범 연구 연계방안 등을 제시한다. (결과) CCTV 보조시설물에 대한 인지응답은 33.3%로, 공공디자인 강화 및 적극적인 홍보가 필요할 것으로 사료된다. CCTV 보조시설물로 인해 안전수준이 높아진 것으로 응답한 비율이 82.5%, 범죄가 예방될 것으로 응답한 비율이 83.0%로 해당 시설물이 긍정적인 효과로 인식됨을 알 수 있었다. 이에 따라 CCTV 설치 시 해당 보조시설물을 의무적으로 설치하는 정책적 방향이 필요할 것으로 사료된다. CCTV 보조시설물 간 상대적 중요도 평가 결과, 실시간 범죄대응에 결정적인 역할이 가능한 비상벨이 84%로 가장 높고, LED안내판(71.0%)과 바닥그림자(70.0%)와 같이 야간에 특화된 보조시설물에 대한 중요성이 평상시 자연감시 역할을 하는 CPTED 디자인(63.5%)에 비해 높게 나타났다. (결론) 본 연구는 지자체에서 신규 또는 기존 CCTV에 해당 보조시설물을 함께 설치할 때 의사결정을 지원하는 근거자료로 활용 가능할 것으로 기대된다. 또한 비상벨 신고 시 PTZ카메라와 연계되어 신고자의 정확한 상황정보 제공, 야간범죄 예방을 위한 스마트조명 활용, 지능형CCTV 영상분석 연계 등 최근 이슈되고 있는 스마트시티 방범분야에 대한 연계를 통해 실시간 범죄대응 및 예방적 방범에 큰 시너지효과를 가져올 것으로 기대된다. (Background and Purpose) Today's CCTVs are not just collecting video, but they also play a role in improving crime prevention effects in urban spaces, such as responding to real-time crimes and acting as a natural surveillance with CCTV accessories. However, these CCTV attachments are only supplementary installations to increase the security effect in addition to the purpose of collecting video information, which is the main function of CCTV. Therefore, it is often not installed depending on the budget situation of local governments. In this regard, this study analyzes citizens' perception of CCTV auxiliary facilities and expected level of crime prevention effect in urban space, and suggests future local decision support and linkage with intelligent crime prevention research. (Method) In order to analyze the effects of CCTV auxiliary facilities on urban crime prevention, this study set up Test-Bed area (Gwanyang 2-dong) in Anyang-si, where 15 CCTVs were installed, including emergency bells, LED signs, high lighting, and CPTED design. This study analyzed the degree of recognition and safety of CCTV auxiliary facilities, the expected effects of crime prevention of CCTV auxiliary facilities installed in the area, and the relative importance among CCTV auxiliary facilities through a citizen survey on the test-bed. (Results) Cognitive responses to CCTV auxiliary facilities were 33.3%. Citizens did not have much interest in the facilities as they walked through the streets. The response rate of safety sensation by CCTV auxiliary facilities was 82.5%. and the rate of crime prevention was 83.0%. In particular, 89.0% of the respondents said that CCTV auxiliary facilities should be installed more than now. As a result of evaluating the relative importance among CCTV auxiliary facilities, the highest alarm bell was 84%, which can play a decisive role in real-time crime response, and the importance of night-specific auxiliary facilities such as LED signs (71.0%) and floor shadows (70.0%) It was higher than CPTED design (63.5%), which acts as a natural surveillance. All three facilities, except for the emergency bell, were analyzed to be 20% lower than the overall safety diminishing rate. This indirectly indicates that the synergy effect is large when the CCTV auxiliary facilities are configured together. (Conclusions) This study is expected to be used as supporting data for decision making when local governments install relevant auxiliary facilities in new or existing CCTVs. In addition, it is expected to bring great synergy effect to real-time crime response and preventive crime prevention through linkage in the smart city crime prevention area that is recently being issued.