• 펄프종이기술
• /
• 제42권1호
• /
• pp.13-19
• /
• 2010

Four waste paper mills in Korea, where multifractors, devices for fiber fractionation, were installed, were selected to investigate how effectively and how differently the multifractors were used. They all used slot-type screens. Effective fiber fractionations by fiber length were expected by the multifractors, but in reality, they were used for selecting fiber furnishes that were flexible and hydrated. Flakes, which meant large fiber bundles, were rejected effectively by the multifractors. There existed a high regression coefficient between the fiber length differences and the freeness differences of the accepted and the rejected fiber furnishes.

• Journal of Microbiology and Biotechnology
• /
• 제9권2호
• /
• pp.147-149
• /
• 1999

Biotransformation of exogenous (-)-(4R)-isopiperitenone in cell suspension cultures of Mentha piperita resulted in oxidized products, with (-)-7-hydroxyisopiperitenone being the major compound. The mass of products obtained $unde^{18}O_2$, atmosphere was two units higher than that under normal atmosphere. The biotransformation was inhibited by several cytochrome P450-specific inhibitors as well as by carbon monoxide. Carbon monooxide inhibition was substantially overcome by irradiation of cells with blue light including light at 450nm wavelength. These results suggested that a cytochrome P450-type monooxygenase was involved in the biotransformation.

• 농업과학연구
• /
• 제38권3호
• /
• pp.541-547
• /
• 2011

Korean building industry was developed by concrete and steel construction. However, concrete and steel have some problems which low carbon storage capability and difficulty of recycling. According to many studies, timber has high carbon storage capability, high recycling capability and sustainable supporting capability. Focus on this factors of timber, make new wall structure as Green Timber Wall panels and check the shear performance to use wall system in housing construction such as light-weight timber construction and nondearing wall on other construction. In the results, B-4-B and B-4-S show similar modulus of shear stiffness on the table. GH-4-GH has slip shape failure mode between Green Timber Wall boards. GH-4-GV has most stable characteristic curve than other specimens.

• 펄프종이기술
• /
• 제47권3호
• /
• pp.24-33
• /
• 2015

Linerboards containing wood flours were developed to increase solid contents in wet pressing process. Presence of wood flours in recycled fibers allowed passage of pressurized water at high wet pressing pressure, and increased solid contents while keeping the bulk of the board. The amount of wood flour addition should be controlled based on the intensity of the wet pressing pressure and the properties of the wood flours. Addition of cationic starch to the wood flour containing OCC furnish showed synergic increase of solid content and strength properties. Shapes of the wood flours such as spherical and rod type added to OCC furnish affected largely their solid content, drainage, and board physical properties.

• 펄프종이기술
• /
• 제47권6호
• /
• pp.81-88
• /
• 2015

The molecular weight (MW) and crystallinity of cotton linter need to be controlled to be dissolved well in N-methylmorpholine N-oxide (NMMO) solvent for manufacturing regenerated fibers of clothing fabrics. Electron beam irradiation or sulfuric acid pre-treatment followed by alkaline peroxide bleaching has been used to control MW effectively and to improve brightness of cotton linter. Auto-hydrolysis of cotton linter without electron beam irradiation or chemical pre-treatment was found to be effective as an alternative pre-treatment method. Removal of metal ions, that hampered dissolution of cotton linter by NMMO, was also investigated when the auto-hydrolysis was accompanied with ionic polymers and chelating agent.

• 한국재료학회지
• /
• 제14권4호
• /
• pp.287-292
• /
• 2004

A bio-composites were prepared by mechanical mixing with bioactive sol-gel derived $CaO-SiO_2$ and organic PEEK for bone repairing hybrid materials. The composites were characterized by in-vitro test. A bonelike apatite was formed on the surface of all bio-composites in SBF test. The cell morphology and adhesion on the surface of the composites having below 30% PEEK were clearly observed in L929 cell experiment.

• Applied Biological Chemistry
• /
• 제39권5호
• /
• pp.414-417
• /
• 1996

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2015년도 춘계학술발표대회
• /
• pp.412-414
• /
• 2015

최근 금융과 IT가 결합한 핀테크 산업이 빠르게 성장하고 있다. 전통적 금융 서비스에서 벗어나 소비자 접근성이 높은 인터넷, 모바일 기반 디바이스의 장점을 활용하여 송금, 결제, 자산관리 등 다양한 분야의 금융서비스를 제공한다. 하지만 핀테크 기술 발전으로 네트워크, 클라이언트, 시스템 등 각각의 부문에서 새로운 보안 위협 요소가 증가 할 것이다. 본 논문에서는 핀테크 보안의 고려사항과 연구동향에 대해 살펴보고 현재 핀테크 분야에서 보안이 적용된 시스템에 대해 분석하고 취급되는 정보보호의 중요성에 대해 고찰한다.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2015년도 춘계학술발표대회
• /
• pp.421-423
• /
• 2015

인터넷을 통한 악성코드의 확산이 나날이 증가하고 있는 가운데 특정 대상을 목표로 하여 지능적이고 지속적으로 공격하는 Advanced Persistent threat(APT) 공격이 이슈가 되고 있다. APT 공격은 특정 시스템을 목표로 하여 공격하기 때문에, 실제 공격이 성공 했을 시에는 그 피해가 더 치명적일 수 있다. 본 논문에서는 APT공격의 정의를 살펴보며, 최근에 발생하는 일반적인 APT 공격의 형태와 그 대응 방안에 대해 논의한다.

• 식품과학과 산업
• /
• 제51권2호
• /
• pp.157-164
• /
• 2018

Recently demand for safer and healthier food has augmented with advancements in health conditions. Food ingredients with yet to be known safety and functionality, are being investigated for their safety or detrimental effects. The Ministry of Food and Drug Safety has introduced "health functional food" by the "Health Functional Food Act" to evaluate bio-functional and safety properties of raw materials using standard methods including in-vitro and in-vivo testing before human consumption. Despite recent growth in net worth of domestic functional food market, most of the raw materials are not from local Korean industries with own research and development, and mostly terrestrial not marine resources. Geographically, Korea has access to diverse marine bio-resources that need to be managed and utilized sustainably. Recently, diverse novel physiologically active substances have been reported from marine organisms. Hence, the development of functional foods from marine bio-resources is considered as an inevitably important task.