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NTIS 바로가기Journal of plant biotechnology = 식물생명공학회지, v.45 no.4, 2018년, pp.400 - 408
이인혜 (국립생물자원관 유용자원활용과 생물소재연구팀) , 전지영 (국립생물자원관 유용자원활용과 생물소재연구팀) , 김경미 (국립생물자원관 유용자원활용과 생물소재연구팀) , 강명석 (국립생물자원관 유용자원활용과 생물소재연구팀)
Biodiversity has continued to degrade in the
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핵심어 | 질문 | 논문에서 추출한 답변 |
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유리화는 무엇인가? | 이러한 cell 손상을 방지하기 위해서는 동결보존제를 이용한 유리화과정(vitrification)이 필요하다. 유리화라는 것은 동결보존제와 미세조류를 혼합하여 부동액 상태로 만들어 동결온도를 낮추고 점성을 높여서 결정대신 점성용액의 무형결정, 즉 유리질이 되도록 하는 것이다 (polge et al. 1949; Fahy et al. | |
미세조류의 동결보존에 관해 구체적인 연구가 필요한 이유는 무엇인가? | 본 연구에서 사용하는 미세조류는 유용 생물자원으로 활용도가 높으나 동결보존하는 방법이 개발되어 있지 않아 장기보존에 어려움이 있다. 대부분의 원핵생물이나 균류 등의 미생물은 종에 관계없이 glycerol 을 이용하여 저온동결보존이 가능하나 미세조류는 동결보존제의 종류와 농도, 유리화 과정 및 해동방법 등에 따라 세포 재생률에 차이가 있기 때문에 구체적인 연구가 필요하다. 미세조류 중 규조류는 전 세계적으로 발견되며 규산질로 구성된 cell wall 은 이미 산업적으로 많이 이용되고 있다. | |
미세조류의 동결보존방법에서 적절한 동결보존제의 선택이 중요한 이유는 무엇인가? | 미세조류의 동결보존방법은 일반적으로 저온냉장고(-80°C) 와 액체질소 liquid nitrogen (-196°C)를 이용한 동결방법을 말하며, 액체질소에 장기보존하는 연구가 다양하게 시도 되고 있다. 미세조류를 액제질소에 동결시킬 때 세포는 건조 및 삼투압 작용으로 인해 세포 내에 얼음 결정이 형성되어 세포 생존 능력이 상실되기 때문에 이를 조절하기 위한 적절한 동결보존제(Cryoprotectants: CPAs)의 선택은 매우 중요하다(Nowshari and Brem 2001). 따라서 glycerol, DMSO (Dimethyl sulfoxide), methanol 및 sucrose등과 같은 다당류와 최근 들어 개발되고 있는 동결방지단백질(antifreeze protein)과 같은 다양한 보존제를 이용한 동결보존방법이 연구되고 있다(Tzovenis et al. |
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