• Microbiology and Biotechnology Letters
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• v.44 no.2
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• pp.145-149
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• 2016

Thermal acid hydrolysis pretreatment of Kappaphycus alvarezii was carried out with 12% (w/v) seaweed slurry and 180 mM H₂SO₄ at 140°C for 5 min. Utility of the thermotolerant yeast Kluyveromyces marxianus KCTC7150 was evaluated with respect to cell growth and ethanol fermentation at 40°C was close to optimal for enzymatic hydrolysis. This could lead to the integration of both the saccharification and fermentation processes. The levels of ethanol production by simultaneous saccharification and fermentation (SSF) with non-adapted and adapted K. marxianus KCTC7150 were 9.1 g/l with an ethanol yield (Y_EtOH) of 0.24 and 10.2 g/l with an ethanol yield (Y_EtOH) of 0.27 at 156 h, respectively. The two-phase SSF process was employed in this study to improve the efficiency of ethanol fermentation. Adapted K. marxianus KCTC7150 using the two-phase SSF process produced 13.5 g/l with an ethanol yield (Y_EtOH) of 0.35 at 96 h. Development of the two-phase SSF process could enhance the overall ethanol fermentation yields of the seaweed K. alvarezii.

• Korean Chemical Engineering Research
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• v.44 no.1
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• pp.16-22
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• 2006

Biological hydrogen production processes are more environment-friendly and less energy intensive than thermochemical and electrochemical processes. The biological process can be divided into two categories: photosynthetic hydrogen production and hydrogen production by dark fermentation. Photosynthetic process produces hydrogen mainly from water and reduces $CO_2$ simultaneously. Dark fermentation is a dark and anaerobic process that produces hydrogen by fermentative bacteria from organic carbon. The article presents a survey of biological hydrogen production processes.

• KSBB Journal
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• v.7 no.1
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• pp.15-20
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• 1992

The use of Jerusalem artichoke containing $\beta$-1, 2-fructose oligomer in the production of sorbitol that is used as food additives and precursor for the L-sorbose has been studied. Coimmobilization of both inulinase and oxidoreductase was considered for the simultaneous reaction for hydrolysis of inulin and conversion of glucose and fructose liberated from inulin to sorbitol. Both inulinase and oxidoreductase were immobilized in chitin(5%, w/v) and K-carrageenan(4%, w/v), The activity of oxidoreductase was specified by permeabilization of Zymomonas mobilis cell with 0.2% CTAB(Cetyltrimethylammonlumbromide). The use of inulinase for hydrolysis of inulin resulted in 36.65g/l of glucose and 85.32g/1 of fructose respectively. These are valuable substrates for sorbitol production. Using these hydrolyzates, accumulation of 35.64g/l for sorbitol occurred at $38^{\circ}C$ and pH6.2. When permeabilized cells and inulinase were coimmobilized, sorbitol produced at 30.15g/l although it is low compared with 35.64g/l in separated reactor system.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.167-168
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• 2009

As the rapid increase of the container trade, most of the container terminals strive to improve the container handling productivity. Therefore, they consider to find efficient operating strategies and to introduce new container handling facilities. In terms of equipment, there are a variety of types of quay cranes. Single-lift crane operates only one container regardless of size and twin-lift crane operates two 20' containers or one 40' container simultaneously. Tandem crane, recently introduced, can operate four 20' containers or two 40' containers simultaneously. In this paper, we propose the mathematical model and the solution procedure of the ship loading scheduling problem for the tandem crane.

• Agrochemical news magazine
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• v.21 no.6 s.159
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• pp.2-4
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• 2000

• 전기의세계
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• v.66 no.10
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• pp.17-22
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• 2017

• The monthly packaging world
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• s.130
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• pp.106-108
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• 2004

• Monthly Duck's Village
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• s.157
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• pp.30-34
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• 2016

• Water for future
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• v.47 no.5
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• pp.8-12
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• 2014

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1991.04a
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• pp.256-269
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• 1991

컴퓨터 통합 생산(Computer Integrated Manufacturing, CIM) 기술은 재래적 개념으로 생산의 3대 요소인 토지(Land), 노동(Labor), 자본(Capital)이외에 정보(Information)의 요소를 추가로 활용하여 설계, 가공과 조립, 검사, 저장 및 운반, 그리고 생산 관리간의 정보교환을 통합적으로 제어, 응용함으로써 전 생산 공정의 컴퓨터를 통한 자동화를 구현한 이래 총체적 최적 생산을 추구하는 생산 형태로 서 종래의 개념으로서는 양립된 생산성(Productivity)과 유연성(Flexibility)을 동시에 얻고자 하는 첨단 생산 기술이다. 본 연구에서는 나름대로의 전략을 수립 하여 어느정도 보편화 되어있는 기기들의 공정 제어(Process Control)및 통신에 관해 연구하고 이를 구현하는 소프트웨어를 제작하고 실험을 거쳐 검증하려 한다. 초기 단계에서는 퍼스널 컴퓨터 (Personal Computer, PC)상에서 프로그램의 실험을 하고 이를 바탕으로 다중작업 오퍼레이팅 시스템(Multi-Task Operating System)으로 의 전이를 꾀할 것이다.