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( Ye-lim Park ),( Tae-rim Choi ),( Hyun Joong Kim ),( Hun-suk Song ),( Hye Soo Lee ),( Sol Lee Park ),( Sun Mi Lee ),( Sang Hyun Kim ),( Serom Park ),( Shashi Kant Bhatia ),( Ranjit Gurav ),( Changmin 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.2
Among various species of marine bacteria, those belonging to the genus Halomonas have several promising applications and have been studied well. However, not much information has been available on their antibiotic resistance. In our efforts to learn about the antibiotic resistance of strain Halomonas socia CKY01, which showed production of various hydrolases and growth promotion by osmolytes in previous study, we found that it exhibited resistance to multiple antibiotics including kanamycin, ampicillin, oxacillin, carbenicillin, gentamicin, apramycin, tetracycline, and spectinomycin. However, the H. socia CKY01 resistance pattern to kanamycin, gentamicin, apramycin, tetracycline, and spectinomycin differed in the presence of 10% NaCl and 1% NaCl in the culture medium. To determine the mechanism underlying this NaCl concentration-dependent antibiotic resistance, we compared four aminoglycoside resistance genes under different salt conditions while also performing time-dependent reverse transcription PCR. We found that the aph2 gene encoding aminoglycoside phosphotransferase showed increased expression under the 10% rather than 1% NaCl conditions. When these genes were overexpressed in an Escherichia coli strain, pETDuet-1::aph2 showed a smaller inhibition zone in the presence of kanamycin, gentamicin, and apramycin than the respective control, suggesting aph2 was involved in aminoglycoside resistance. Our results demonstrated a more direct link between NaCl and aminoglycoside resistance exhibited by the H. socia CKY01 strain.
Predictors of success with postoperative voiding trials after incontinence surgery
( Ye Jin Park ),( Yeo Jung Moon ),( Su Yeon Park ),( Soo Rim Kim ),( Sei Kwang Kim ),( Sang Wook Bai ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
We identified predictors of passing a voiding trial after incontinence surgery and examined of successful performance on a voiding trial was maintained. A total of 125 women scheduled for transobturator tape(TOT) at Yonsei university health system were enrolled from January 2010 until December 2012. Patients underwent TOT with another surgery such as hysterectomy, perineorrhaphy were excluded. Medical history included hypertension, diabetes mellitus(DM), cerebrovascular accident(CVA) and spinal disease. Voiding trials were performed the next day of operation after removal of foley catheter, with less than a half volume void after more than a 300 ml considered passing. Residual urine was checked by nelaton catheterization. A total of 118 participants passed the first voiding trial. Univariate analysis identified nine potential predicting variables for passing the first voiding trial. From these nine variables, significant differences for passing the first voiding were identified in the patients with aged, DM or CVA. Those three variables were analyzed with multiple regression to examine the dependency of them. There was no significant difference between the patients over fifty years old and the patients below fifty years old. There was increased odds ratio(OR) with DM(OR:7.5;95% confidence intervals, CI:1.34-42.16) or CVA(OR:10.7; 95% CI:1.41-81.01) for passing the first voiding trial. The patients with DM, CVA were more likely to fail postoperative voiding trials after incontinence surgery which suggests that preoperative counseling and education on CIC are needed on women with such risk factors before incontinence surgery.
문서 기반 성별 예측을 위한 요인 추출 및 한글 문서에의 적용 연구
최예림 ( Ye Rim Choi ),김소이 ( So Lee Kim ),박규연 ( Kyu Yon Park ),박종헌 ( Jong Hun Park ) (주)엘지씨엔에스(구 LGCNS 엔트루정보기술연구소) 2015 Entrue Journal of Information Technology Vol.14 No.3
최근 개인화된 추천 시스템과 같이 성별 정보를 필요로 하는 서비스가 증가함에 따라 사용자의 성별 예측은 주요 연구 주제로 각광받고 있다. 이미지, 동영상, 센서 등 다양한 데이터를 기반으로 성별 예측이 이루어지고 있으며, 이 중 SNS나 블로그의 글을 토대로 저자의 성별을 알아 낼 수 있다. 이때, 문서에서 추출된 요인의 종류에 따라 예측 성능이 달라진다고 알려져 있다. 따라서 본 연구에서는 기존 문서 기반 성별 예측 연구에서 사용된 요인의 종류 및 추출 방법론을 정리하고 이들의 한글 문서에의 적용 가능성을 살펴본다. 약 40종류 이상의 요인들이 정리되었으며, 이들 중 한글 문서에 적용 가능한 요인들을 선정하여 한글 블로그 문서에서 추출하였다. 이렇게 추출된 요인을 이용하여 성별 예측 실험을 수행하였으며 실험을 통해 열린 사전 요인과 의미 요인이 성별 예측에 유의미하다는 결론을 내릴 수 있었다. As gender information is required in diverse domains, gender prediction becomes an important research issue. Among gender pre-diction using various data types including image, video, and sensor data, gender prediction using text documents makes it possible to predict gender of users in social network or blog services using documents written by them. Gender prediction performance is closely related to the features extracted from documents and used for prediction. In this regard, we introduce feature extraction methods adopt-ed in previous gender prediction studies using text documents and investigate their application to a Korean corpus. We categorized the features into more than 40 types. Some of them, which can be applied to Korean corpus, were utilized for gender prediction using Ko-rean blog corpus. From the experiment, it can be concluded open dictionary features outperformed other lexical features and sematic feature is most effective for gender prediction.
발열 온도에 따른 기류식 식품 고속분쇄기의 상태 변화 분석
장예림 ( Ye Rim Jang ),이다연 ( Da Yeon Lee ),박세준 ( Se Jun Park ),박건수 ( Keon Soo Park ),이충호 ( Choong Ho Lee ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2
기류식 식품 고속분쇄기는 생활양식의 변화와 가공식품 시장의 성장에 맞게 식품소재를 수㎛ ~ 수십㎛로 열변성에 의한 영양 파괴를 최소화하여 미세 분쇄할 수 있다. 열에 의한 식품의 변성이 없어야 하기에 발열 온도에 따른 식품 고속분쇄기의 상태 변화 분석을 통해 고속 분쇄를 할 때 식품 변성을 최소화하는 것으로 설계 목표를 삼고 있다. 본 연구는 SolidWorks S/W의 Flow simulation을 활용하여 식품 고속 분쇄기의 온도를 변화시켜 분쇄능력에 영향을 미치는지 해석을 진행하였다. 온도를 30℃, 70℃, 110℃로 가정하고 대두의 물성치를 입력한 후 대두로 유체를 설정하고 SUS 304로 재질을 설정한 후 유입구 질량유량을 50kg/h, 유출구 질량 유량을 개발 목표치인 15kg/h로 설정하여 해석을 진행하였다. 해석 결과, 온도 30℃일 때 3.07MPa, 속도 0.67km/s이고 온도 70℃일 때 압력 3.04MPa, 속도 0.66km/s이다. 온도 110℃일 때의 압력은 3.02MPa, 속도 0.63km/s로 산출되었다. 개발 목표치인 30℃는 압력과 속도가 70℃, 110℃와 결과값의 차이가 크지 않아 목표에 적합한 온도이고 분쇄하였을 때 분쇄물의 부피가 작고 효율성이 좋다고 사료된다. 시뮬레이션결과 개발 목표치인 30℃ 와 고온 상태인70℃, 110℃를 비교하였을 때 차이가 크지 않아 30℃로 개발하여도 무방하고 식품 변성을 최소화하려면 온도의 영향을 최대한 받지 않아야 하기 때문에 냉각장치 설계 등 분쇄기의 성능을 최적화할 예정이다.
( Hye-rim Jung ),( Ju-hee Lee ),( Yu-mi Moon ),( Tae-rim Choi ),( Soo-yeon Yang ),( Hun-suk Song ),( Jun Young Park ),( Ye Lim Park ),( Shashi Kant Bhatia ),( Ranjit Gurav ),( Byoung Joon Ko ),( Yung- 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.5
Polyhydroxybutyrate (PHB), the most well-known polyhydroxyalkanoate, is a bio-based, biodegradable polymer that has the potential to replace petroleum-based plastics. Lignocellulose hydrolysate, a non-edible resource, is a promising substrate for the sustainable, fermentative production of PHB. However, its application is limited by the generation of inhibitors during the pretreatment processes. In this study, we investigated the feasibility of PHB production in E. coli in the presence of inhibitors found in lignocellulose hydrolysates. Our results show that the introduction of PHB synthetic genes (bktB, phaB, and phaC from Ralstonia eutropha H16) improved cell growth in the presence of the inhibitors such as furfural, 4-hydroxybenzaldehyde, and vanillin, suggesting that PHB synthetic genes confer resistance to these inhibitors. In addition, increased PHB production was observed in the presence of furfural as opposed to the absence of furfural, suggesting that this compound could be used to stimulate PHB production. Our findings indicate that PHB production using lignocellulose hydrolysates in recombinant E. coli could be an innovative strategy for cost-effective PHB production, and PHB could be a good target product from lignocellulose hydrolysates, especially glucose.
Yeon, Ye-Rim,Park, Young Jun,Lee, Ji-Sung,Park, Jung-Woo,Kang, Sin-Gun,Jun, Chul-Ho WILEY-VCH Verlag 2008 Angewandte Chemie. international edition Vol.47 No.1
<B>Graphic Abstract</B> <P>Surface paradise: Facile catalytic post-grafting of the surface of glass or indium tin oxide (ITO, see picture) with a variety of functional groups has been achieved. Methallylsilanes serve as the grafting reagent and the surfaces show remarkable chemical stability. <img src='wiley_img/14337851-2008-47-1-ANIE200703112-content.gif' alt='wiley_img/14337851-2008-47-1-ANIE200703112-content'> </P>
비정질 할로이사이트 나노입자의 교차적층 구조에 따른 탄소섬유/에폭시 라미네이트의 저속 충격 특성
박예림 ( Ye-rim Park ),( Sanjay Kumar ),김윤해 ( Yun-hae Kim ) 한국복합재료학회 2023 Composites research Vol.36 No.4
필라멘트 와인딩 공정을 사용한 FRP 복합재의 적층 구조는 기존의 FRP 복합재의 적층 구조와는 다를 뿐만 아니라 일반적인 적층 구조를 토대로 기계적 물성에 대해서 분석하고자 한다면 그에 대한 영향을 파악하는 것이 어렵다. 따라서 전반적인 성능을 향상시키기 위해 기계적 물성을 개선하고 교차 적층 구조를 최적화하는 것이 필수적이다. 따라서 본 연구는 비정질 할로이사이트 나노튜브(Amorphous Halloysite Nanotubes, A-HNT)를 5개의 층 배열을 통해 교차 적층 탄소 섬유 강화 플라스틱(CFRP) 구조의 저속 충격 특성에 미치는 영향을 조사하는 것을 목표로 한다. 중량 낙하식 충격시험을 통하여 라미네이트의 저속 충격 특성을 확인하였으며, 충격을 가한 후에 현미경을 통하여 충격 파손 모드와 손상 정도를 비교 평가하였다. 나노 입자의 첨가 여부에 따른 각각의 교차 적층 구조 라미네이트를 10 J과 15 J의 충격에너지에서 비교하였다. 10 J의 경우 흡수에너지는 각 구조에서 비슷한 경향을 보였다. 그에 비해 15 J의 경우 흡수에너지는 각 구조에서 다른 흡수에너지를 가지며, 나노 입자가 첨가되지 않은 구조가 가장 높은 흡수에너지를 가진다. 또한 광학현미경을 통하여 각 구조에서 다양한 충격 파손 모드가 관찰되었다. The stacking configuration of fiber-reinforced polymer (FRP) composites, achieved via the filament winding process, exhibits distinct variations compared to conventional FRP composite stacking arrangements. Consequently, it becomes challenging to ascertain the influence of mechanical properties based on the typical stacking structures. Thus, it becomes imperative to enhance the mechanical behavior and optimize the interleaved structures to improve overall performance. Therefore, this study aims to investigate the impact of incorporating amorphous halloysite nanotubes (A-HNTs) within different layers of five unique layer arrangements on the low-velocity impact properties of interleaved carbon fiber-reinforced polymer (CFRP) structures. The low-velocity impact characteristics of the laminate were validated using a drop weight impact test, wherein the resulting impact damage modes and extent of damage were compared and evaluated under microscopic analysis. Each interleaved structure laminate according to whether nanoparticles are added was compared at impact energies of 10 J and 15 J. In the case of 10 J, the absorption energy showed a similar tendency in each structure. However, at 15 J, the absorption energy varies from structure to structure. Among them, a structure in which nanoparticles are not added exhibits the highest absorption energy. Additionally, various impact fracture modes were observed in each structure through optical microscopy.