과제정보
본 연구는 미래창조과학부 방사선기술개발사업 (No. 2015M2A2A6A03045350)의 지원에 의해 수행되었으며 이에 감사드립니다. 또한 저자들은 분석기기 사용을 도와주신 (재)대구나노테크노파크 나노융합실용화센터 박수현 님, 최경식 님과 전경수 님께 감사드립니다.
Extracellular polymeric substance (EPS) is produced by microorganisms for a variety of purpose in response to environmental stresses. The EPS are heterogeneous mixture composed dominantly of polysaccharides and proteins, with nucleic acid and lipid as minor constituents. Application of a bacterial EPS is in mostly bioremediation in environment and it applied to pharmaceutical industries including indwelling medical devices. Furthermore, the EPS studies have mostly been performed in the only level of bacterial culture system. In this study, we have first investigated the structural modification of EPS using ionizing radiation technique. The extracted EPS solution from bacterial culture step was exposed to gamma-irradiation at room temperature. Especially, the EPS was given irradiation at various ranges of 0, 2, 10 and 30 kGy from 60Co gamma-ray source. The structural property and surface morphology were characterized by using Fourier-transform infrared (FTIR) and field emission-scanning electron microscopy (FE-SEM). Also, the conductivity of EPS was determined by using the Van der PauW method, and the polymeric substances turned out to have semi-conductivity (about 5.38*10-7).
본 연구는 미래창조과학부 방사선기술개발사업 (No. 2015M2A2A6A03045350)의 지원에 의해 수행되었으며 이에 감사드립니다. 또한 저자들은 분석기기 사용을 도와주신 (재)대구나노테크노파크 나노융합실용화센터 박수현 님, 최경식 님과 전경수 님께 감사드립니다.