• Journal of Practical Agriculture & Fisheries Research
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• v.21 no.1
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• pp.135-148
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• 2019

King oyster mushroom(Pleurotus eryngii) is one of the most commercially important mushrooms in Korea. Development of fruit body and disease occurrence are sensitive to environmental conditions such as temperature, humidity, carbon dioxide(CO₂) concentration. The purpose of this study was to investigate the changes in the growth environment of king oyster mushroom by installing Airocide, an air purifier for the purpose of improving mushroom cultivation environment. The results of the environment conditions, identification of pathogenic organisms and pathogenesis during the cultivation were as follows. Airocide operation increased the CO₂ concentration of the cultivation room by more than 400 ppm on average, but the increase of CO₂ concentration at this level had little effect on the quality and growth of fruit body. Operation of the Airocide tended to reduce the air humidity of the cultivation room and required more humidification. In humidifying conditions, the Airocide has the effect of lowering the species and density of bacteria and reducing bacterial symptoms and abnormal fruiting body of mushroom. Pseudomonas sp., the mushroom pathogen, was isolated from the cultivation room without Airocide, resulting in serious disease and loss of yields, so that only about 83% of substrate could harvest normal fruiting bodies. No disease symptom caused by bacteria and fungi in the cultivation room with Airocide. Trichoderma sp., Penicillium sp. and Cladosporium sp. were isolated from all experimental conditions, but did not inhibit fruit growth or caused diseased.

• KSBB Journal
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• v.17 no.4
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• pp.321-325
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• 2002

Chiral epoxides are valuable intermediates for the asymmetric synthesis of enantiopure bioactive compounds. Microbial epoxide hydrolases (EHs) are newly discovered enzymes and versatile biocatalysts for the preparation of chiral epoxides by enantioselective hydrolysis of cheap and easily available racemic epoxide substrates. EHs are commercially potential biocatalysts due to their characteristics such as high enantioselectivity, cofactor-independent catalysis, and easy-to-Prepare catalysts. In this Paper, recent progresses in biochemistry and molecular biology of EH and developments of novel reaction systems are reviewed to evaluate the commercial feasibility of EH-catalyzed hydrolytic kinetic resolution for the production of chiral epoxides.

• Proceedings of the Korean Vacuum Society Conference
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• 1998.02a
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• pp.179-179
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• 1998

실리콘 집적회로 제조시 sub-micron 의 contact 형성 공정은 질연막 형성 후 이의 식각 및 세정, c contact 실리사이드, 획산방지막, 배선 금속층의 형성 과정올 거치게 된다. 본 연구팀에서는 C.F야f2 헬리 콘 플라즈마훌 이용한 고선택비 contact 산화막 식각공정시 형성된 잔류막충과 오염 손상올 관찰하고 산소 플라즈마 처리와 후속 열처리에 따른 이들의 제거 정도를 관찰하여 이에 대한 결과를 발표하였다. 본 연구메서는 식각 및 후처리에 따라 잔류하는 잔류막과 손상층이 후속 공정인 contact 실리사이드 형 섬에 미치는 영향올 관찰하였다. C C.F바f2 웰리콘 풀라즈마률 이용한 식각시 공정 변수로는 수소가스 첨가, bias voltage 와 과식각 시간 의 효과를 관찰하였으며 다른 조건은 일정하게 하였다 .. Contact 실리사이드로는 Ti, Co-싫리사이드를 선 택하였으며 Piranha cleaning, 산소 플라즈마 처리, 산소 풀라즈마+600 'C annealing으로 각각 후처리된 시 편을 후처리하지 않은 시펀돌과 함께 실리사이드 형성용‘시펀으로 이용하였다 각각 일정 조건에서 동 일 두께의 실리사이드훌 형성시킨 후 4-point probe룰 이용하여 면저황올 측정하였다 후처리하지 않은 시편의 경무 실리사이드 형성은 아주 시펀의 일부분에서만 형성되었으며 후속 세정 및 얼처리훌 황에 따라 실리사이드의 면저항은 감소하여 식각 과정을 거치지 않은 깨끗한 실리콘 웨이퍼위에 실리사이드 를 형성시킨 값(control 값)에 접근하였다. 실리사이드의 면저항값은 식각시 노훌된 실리콘 표면 위에 형 성된 손상충보다는 잔류막에 큰 영향을 받았으며 수소 가스가 첨가된 식각 가스로 식각한 시편으로 형 성한 실리사이드의 면저항값이 손상이 상대적으로 적은 것으로 관찰된 수소훌 첨가하지 않은 식각 가 스로 식각한 시펀 위에 형성된 실리사이드의 면저황에 비해 낮은 값을 나타내었다. 실리사이드의 전기적 륙성에 미치는 손상층의 영향올 좀더 면밀히 관찰하고자 bare 실리콘 wafer 에 잔류막이 거의 없이 손상층을 유발시키는 식각 조건들 (100% HBr, 100%H2, 100%Ar, Cl싸fz)에 대하여 실 리콘 식각을 수행한 후 Co-실리사이드률 형성하여 이의 면저황을 측정한 걸과 100% Ar 가스로 식각된 시편을 이용하여 형성한 실리사이드의 면저항은 control 에 기까운 면저항값올 지니고 따라서 손상층이 실리사이드 형섬메 미치는 영향은 크지 않음을 알 수 있었다. 이상의 연구 결과훌 통해 손상층이 실리사이드의 형성이나 전기적 톡섬에 미치는 영황은 잔류막층 에 의한 영향보다 적다는 것을 알 수 았으며 잔류막층의 두께보다는 성분이나 걸합상태, 특히 식각 및 후처리 후 잔류하는 탄소 싱분과 C-Si 결함에 큰 영향올 받는 것올 알 수 있었다.

• Journal of Life Science
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• v.16 no.1
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• pp.168-174
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• 2006

Enantiopure epoxides are valuable intermediates for the asymmetric synthesis of enantiopure bioactive compounds. Microbial epoxide hydrolases (EHs) are versatile biocatalysts for the preparation of enantiopure epoxides by enantioselective hydrolysis of cheap and easily available racemic epoxide substrates. EHs are commercially potential biocatalysts due to their characteristics such as high enantioselectivity, cofactor-independent catalysis, and easy-to-prepare catalysts. In this paper, recent progresses In molecular engineering of EHs are reviewed to evaluate the commercial feasibility of EH-catalyzed hydrolytic kinetic resolution for the production of enantiopure epoxides.

• 프린팅코리아
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• v.12 no.7
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• pp.104-105
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• 2013

다이니폰스크린코리아(주)(대표이사 전익성)은 코리아팩 2013 기간 중인 지난 5월 30일 킨텍스 제1전시장 세미나실 208호에서 '미래 패키징 신기술 세미나'를 개최했다. 가장 주목받는 인쇄분야로 떠오르고 있는 패키징 분야에 대한 다이니폰스크린의 관심과 전략을 드러내는 세미나였다.

• Journal of Korean Society of Environmental Engineers
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• v.37 no.11
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• pp.607-618
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• 2015

This study was conducted to suggest hydraulic modification for improving evenness of inlet flow distribution into side stream type low-pressure MF (microfiltration) module using CFD (computational fluid dynamics) simulation and PIV (particle image velocimetry) techniques. From the results of CFD simulation for various typed inlet structure, it was investigated that installing internal orifice baffle in inlet the distribution channel could improve the evenness of inlet flow distribution over about 40%. Also, from the results of PIV measurements which were carried out for verifying the CFD simulation, it was observed that the momentum of the water body coming from the opposite side of the inlet was relatively larger. This momentum would generate strong shear force in the near of inlet side wall. On the other hands, occurrence of dead zone and eddy flow was confirmed in the opposite side.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1994.04a
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• pp.251-257
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• 1994

본 연구에서는 생산현장에서 시시각각으로 발생하는 생산정보를 그 발생원 인 기계, 설비, 작업자, 워크 등에서 직접적으로 수집하고, 정보처리하여 실 시간으로 관리측에 제공할 수 있는 POP(Point of Production) 시스템 개발을 목표로 생산정보발생원과 인터페이스되어 실시간적인 정보수집, 처리를 지원 하는 POP 터미널의 기능을 설계하였다. 또한 통합생산시스템을 유연하게 최 적화 운영 할 수 있도록 계획사이드와의 정보통신 등을 제공하는 모듈화된 POP시스템 운영체계의 설계와 Firmware화를 실시하였다.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.23 no.1
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• pp.16-26
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• 2014

Materials that can be use in CAD/CAM are composite, ceramic, hybrid and metal. Among the available materials, monolithic ceramic technique which is the manufacturing technique using one type of the materials is mainly used in a dental office. It is the technique where final tooth-shaped prostheses are made from the material block and used after polishing or applying heat and that does not require traditional ceramic build-up process. Although shot of esthetic quality, because manufactured within 1 hour the monolithic ceramic technique has advantages such as that treatment can be completed in one day and in one time visit, that stability of the material is high because there are low possibility of distort by not melting and phase transformation, and that it can be easily worked in the office with computer assisted devices. We classified the materials that can be used in this technique based on their generations from clinical stand point.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.10a
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• pp.301-306
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• 2009

High strength steels are widely used for lightweight automobile parts and the control of springback is very important in sheet metal forming. The object of this study is to develop the forming process for stair type side sill made of high strength steel, DP780. Stair type side sill with local formed area and geometry change area can improve stiffness and design freedom but there are a few studies for forming process. The forming technology considered in this paper is form type process, which have many advantages for farming of high strength steel compared with draw type process. Finite element analysis is carried out to predict formability and springback. It is shown that angle calibration of die is essential for reducing springback, and local forming involving bead is effective to control springback also. The effectiveness of local forming and angle calibration is verified by experimental.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.12
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• pp.28-36
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• 1998

This investigation is the result of a structural analysis by the finite element method and static loading test for the optimal structural design of an electric railway vehicle made of stainless 301L materials. We analyzed the stress and displacement of the existing electric car-body structure for predicting the position of concentrated stress, the flow of stress, rigidity to be occurred in the car-body structure when it is subjected to the vertical load. It was exposed that the side sills and window corners around the bolsters are the weak parts of the electric car-body structure because the bolsters of the electric car-body structure were subjected to the vertical load and dynamic load to be occurred during running. The flow of stress and the cause of stress concentration in the weak zone were studied in order to prevent the concentration of stress and buckling. The rearrangement of the structure and the selection of the beam elements were also carried out for optimum design of the structure.