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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Molecular size-based separation of starch molecules and physical characterization using Asymmetrical Flow Field-Flow Fractionation (AsFlFFF)

2014년 9월 4일 16시 46분 38초
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10월 15일 (수요일) 16:00~19:00
저자 및
유영석, 최재영, Lars Nilsson1, Björn Bergenståhl1, 이승호*
한남대학교 화학과, Korea
1Lund university, Sweden
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승인 2건
Starch is a mixture of two α-glucans, amylose and amylopectin, containing α-(1,4) linkages. Amylose (AMY) molecule are essentially linear, while amylopectin (AMP) molecules are branched with 5-6% alpha-(1,6) linkages. Usually AMY and AMP are different in physical properties such as molar masses, radius of gyration (Rg) and hydrodynamic radius (Rh).The rheological and functional properties of starches are influenced by various factors including the molecular size, molar mass distribution, the concentration ratio of AMY to AMP, and the branching characteristics of AMP. Field-flow fractionation (FFF) is a family of separation techniques capable of providing separation and characterization of macromolecules or particles ranging in size from 1nm up to about 100μm. Among the members of FFF family, asymmetrical flow field-flow fractionation (AsFlFFF) is especially suited to analytical separation of bio-colloidal particles. AsFlFFF can provide separation of AMY and AMP, allowing quantitative analysis of the two components, and when coupled with detectors such as multi-angle light scattering (MALS) and refractive index (RI), it can provide the absolute weight-average molar mass (Mw) without the need for calibration. In this study, AsFlFFF conditions were optimized for separation of AMY and AMP and physical characterization of starches in potato and amaranth.