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Identification of Lactobacillus spp. associated with nematodes in peach farm soil
이우현,최재임,이진일,이원표,윤성식,Lee, Woo-Hyun,Choi, Jae Im,Lee, Jin Il,Lee, Won-Pyo,Yoon, Sung-Sik The Microbiological Society of Korea 2017 미생물학회지 Vol.53 No.3
Strains D4 and D5 were isolated from peach-rotten soil during the peach harvest season. The isolates were identified based on morphological and biochemical characterization, and identification was determined by 16S rRNA gene sequencing. Results showed that D4 has high similarity to Lactobacillus plantarum ATCC $14917^T$ and Lactobacillus pentosus ATCC $8041^T$ at 99.05% and 98.98%, respectively. D5 was also similar to Lactobacillus pentosus ATCC $8041^T$ and Lactobacillus plantarum ATCC $14917^T$ at 98.71% and 98.64%, respectively. In contrast, isolates showed differences in carbohydrate utilization in comparison to Lactobacillus plantarum ATCC $14917^T$ and Lactobacillus pentosus ATCC $8041^T$. In view of this we performed VITEK MS matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) analysis, multiplex PCR fingerprinting, and random amplified polymorphic DNA (RAPD)-PCR to further confirm the identification of D4 and D5. The results of these analyses showed that both strains were most similar to Lactobacillus plantarum. 복숭아 수확시기에 낙과한 토양에서 Lactobacillus sp. D4와 D5 균주를 분리하였다. 분리한 Lactobacillus sp. D4와 D5 균주를 동정하기 위하여 형태학적 동정, 생화학적 동정 및 16S rRNA 유전자서열 분석을 수행하였다. 16S rRNA 유전자서열 분석 결과 Lactobacillus sp. D4는 Lactobacillus plantarum subsp. plantarum ATCC $14917^T$과 Lactobacillus pentosus ATCC $40997^T$에 각각 99.05%, 98.98% 일치하였으며, Lactobacillus sp. D5는 Lactobacillus pentosus ATCC $40997^T$, Lactobacillus plantarum subsp. plantarum ATCC $14917^T$에 각각 98.71%, 98.64% 일치하였다. Lactobacillus sp. D4와 D5 균주는 당 이용성 비교에서 Lactobacillus plantarum ATCC $14917^T$과 Lactobacillus pentosus ATCC $8041^T$에 비교하여 다른 결과를 나타내었다. 정확한 동정을 위하여 VITEK MS matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) 분석, multiplex PCR, random amplified polymorphic DNA (RAPD)-PCR을 수행하였다. 이러한 결과에 근거하여 Lactobacillus sp. D4와 D5 균주는 Lactobacillus plantarum으로 동정되었다.
의치수리(義齒修理)에 있어 파절접합부(破折接合部)의 조작형태(造作形態)가 의치(義齒)의 결합력(結合力)에 미치는 영향(影響)에 관(關)한 연구(硏究)
이우현,허성주,조인호,Lee Woo-Hyun,Heo Seong-Joo,Cho In-Ho 대한치과보철학회 1991 대한치과보철학회지 Vol.29 No.3
The purpose of this study was to compare the repaired joint strength among several edge profiles after denture repair. For this study, eight edge profiles were used for repair methods and five self-curing resin brands were used for repair materials. Break away loads were tested after 1 hr., 24 hrs. and 1 week. Instron was used for testing the transverse strength of repaired specimen. The results were as follows. 1. Repaired joint strength was about 35-65% of that of original specimen. 2. Joint strengths of round, inverse knife, inverse rabbit, lap ogee joint were higher tnan that of traditional simple butt joint 3. Joint strength of the simple butt joint was low significant. 4. Joint strengths after 1 hr. specimen were lower than those of 24 hrs. and 1 week specimens in joint strengths. 5. There were no significant differences between 24 hrs. and 1 week specimens in joint strengths. 6. It look more than 24 hours to gain satisfactory physical property after repairing the fractured denture base when self-curing resin was used for repair.
Excimer Laser Annealing 결정화 방법 및 고유전 게이트 절연막을 사용한 poly-Si TFT의 특성
이우현,조원주,Lee, Woo-Hyun,Cho, Won-Ju 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.1
The electrical characteristics of polycrystalline silicon (poly-Si) thin film transistor (TFT) crystallized by excimer laser annealing (ELA) method were evaluated, The polycrystalline silicon thin-film transistor (poly-Si TFT) has higher electric field-effect-mobility and larger drivability than the amorphous silicon TFT. However, to poly-Si TFT's using conventional processes, the temperature must be very high. For this reason, an amorphous silicon film on a buried oxide was crystallized by annealing with a KrF excimer laser (248 nm)to fabricate a poly-Si film at low temperature. Then, High permittivity $HfO_2$ of 20 nm as the gate-insulator was deposited by atomic layer deposition (ALD) to low temperature process. In addition, the solid phase crystallization (SPC) was compared to the ELA method as a crystallization technique of amorphous-silicon film. As a result, the crystallinity and surface roughness of poly-Si crystallized by ELA method was superior to the SPC method. Also, we obtained excellent device characteristics from the Poly-Si TFT fabricated by the ELA crystallization method.
이우현 ( Woo-hyun Lee ),송광철 ( Gyang-cheol Song ),안준재 ( Jun-jae An ),박성미 ( Seong-mi Park ),박성준 ( Sung-jun Park ) 한국산업융합학회 2023 한국산업융합학회 논문집 Vol.26 No.6
The DC part of the DC microgrid power conversion system uses capacitors for buffers of charge and discharge energy for smoothing voltage and plays important roles such as high frequency component absorption, power balancing, and voltage ripple reduction. The capacitor uses an aluminum electrolytic capacitor, which has advantages of capacity, low price, and relatively fast charging/discharging characteristics. Aluminum electrolytic capacitors(AEC) have previous advantages, but over time, the capacity of the capacitors decreases due to deterioration and an increase in internal temperature, resulting in a decrease in use efficiency or an accident such as steam extraction due to electrolyte evaporation. It is necessary to take measures to prevent accidents because the failure diagnosis and detection of such capacitors are a very important part of the long-term operation, safety of use, and reliability of the power conversion system because the failure of the capacitor leads to not only a single problem but also a short circuit accident of the power conversion system.
특급호텔 레스토랑 프로모션 메뉴특성이 호텔이미지 및 직무만족, 조직몰입에 미치는 영향
이우현(Woo Hyun Lee),이연정(Yeon Jung Lee) 한국호텔외식관광경영학회 2012 호텔경영학연구 Vol.21 No.2
This study was conducted to examine the effect of the hotel image and employees` job satisfaction and organizational commitment on promotional menu sales. The findings were first, environment, price predominance, ingredients and the promptness of the promotional menu in deluxe hotels have a positive effect on the hotel image. Especially, price predominance was the most effective factor of the menu features that influence the hotel image. Second, environment, price predominance, promptness and marketing of promotion menu in deluxe hotel restaurants have a positive influence on satisfaction of hotel employees. Among the f eatures of the promotional menu, environment was the most effective factor. Third, environment, promptness and menu effect of menu features have a positive influence on organizational commitment. However, the environment was the one that had a strong effect on organizational commitment. Fourth, the image of deluxe hotel has a positive impact on employees` job satisfaction and organizational commitment. In other words, as the hotel image improves, the employees` job satisfaction and organizational commitment can be expected to increase. Fifth, employees` job satisfaction positively affects the hotel employees` organizational commitment.
경사면 가공 경로에 따른 가공 온도와 볼엔드밀 절삭력 예측에 관한 연구
이우현(Woo-Hyun Lee),조명제(Myoung-Jae Jo),전정도(Jung-Do Chun),박대균(Dea-Kyun Park),전언찬(Eon-Chan Jun) (사)한국CDE학회 2011 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2011 No.1
Recently, Cycle of the product is shortened Because of diversification of consumer needs and demands for high performance & lightweight & precision of a machine part is on the increase. Therefore, In addition to increasing mould products including 3D surfaces, The interest in ball-endmill often using finish cutting has been focused. So in this study, we consider that peak point of ball-endmill is not included on cutting at inclined plane and analysis cutting force in tool at inclined plane and check temperature on cutting.