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NTIS 바로가기식품과학과 산업 = Food science and industry, v.53 no.1, 2020년, pp.43 - 55
Most reports demonstrated the substrate specificity-based kinetic properties of chitin or chitosan degrading enzymes. However, there is virtually less information on the high quality and quantity production of chitin or chitosan hydrolysates having a larger than (GlcN)7 from the hydrolysis of high m...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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키틴이란 무엇인가? | 키틴은 지구상에 가장 풍부하게 존재하는 천연고분자, 즉 다당체로 셀룰로오스(cellulose) 다음 두 번째로 많은 바이오매스(biomass)로 알려져 있다. 키틴은 β-D-glucose의 C-2 hydroxyl기가 acetylamino기로 치환된 N-acetyl-D-glucosamine (GlcNAc)이 (β1→4) 결합에 의해 구성된 고분자(Dweltz 등,1968)로서 게나 새우껍질에서 주로 생산되고 있으며, 여러 갑각류의 외피 구성에 중요한 물질이다. | |
생물체를 구성하는 4대 거대분자는 어떻게 구분할 수 있는가? | 생물체를 구성하는 4대 거대분자로는 이미 잘 알려진 바와 같이 단백질, 지방, 핵산 그리고 일반적으로 탄수화물이라 통용되는 다당체로 크게 구분할 수 있으며, 각각의 해당되는 분자에 대한 분해, 역으로 합성에 관여하는 수많은 효소들의 작용이 밝혀져 있다. 예를 들어, glycosylase, lipase, protease, ATP synthase 드리고 당전이 효소인 glycosyltransferase 등 해당되는 효소의 종료와 기능(Chen, 1979; Montilla등, 2013)은 열거하기 매우 힘들 정도로 다양하다. | |
키틴이 소재로의 활용에 매우 제한적인 이유는 무엇 때문인가? | 키틴은 강산에 녹기는 하지만 이후 사용할 수 없다. 이러한 이유로 여러 가지 수용액화 방법이 개발되고 응용되어 왔으나 화학적 수식(chemical modification) 없이 사용하기 매우 힘든 고분자로 알려져 소재로의 활용에도 매우 제한적이다. 반면, 고온, 강 알칼리 용액 처리에 따른 탈아세틸화된 것이 키토산(chitosan)이다. |
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