초미세분쇄를 이용한 쌀 변성전분의 물리적 특성 변화구명 = Investigation of Physical Property Change in Modified Rice Starch by Ultra Fine Pulverization

국문 초록 (Abstract)

본 연구는 초미세 분체기술을 이용하여 쌀 전분의 입자구조 파괴가 이루어졌을 때 분자구조적, 물리적 변화가 어떻게 이루어지는지를 구명하고자 하였다. 분쇄 후 쌀 전분의 평균직경은 약 20% 감소가 이루어졌으며 비표면적은 25% 증가하였다. 분쇄 전후의 쌀 전분에 대한 분자량분포를 GPC(gel permeation chromatography)로 측정한 결과 Peak II의 면적이 36.5%에서 59.5%로 상승하였다. 분쇄 전후 손상전분 정도는 각각 16.40%와 99.2%로 나타났다. 분쇄 전에 비하여 분쇄 후 쌀 전분의 물결합능력, 용해도와 광 투과도에서도 월등히 높았다. $30^{\circ}C$에서 20 rpm을 기준으로 분쇄후의 쌀 전분의 겉보기점도는 상대적으로 분쇄 전의 7% 수준에 불과하였으며 측정온도가 높아짐에 따라서 차이는 더욱 커졌다.

다국어 초록 (Multilingual Abstract)

This study was performed to analyze the molecular structural and physical properties changes of modified rice starch, which particle structure was broken using high impact planetary mill and ultra fine pulverizing techniques. The average diameter and specific surface area of rice starch after pulverization decreased 20% and increased 25%, respectively. Low molecular substances content in rice starch using GPC (gel permeation chromatography) increased from 36.5% to 59.5% after pulverizing of rice starch. Damaged starch contents in rice starch also increased from 16.4% to 99.2% after pulverizing of rice starch. Water holding capacity, solubility and transmittance of rice starch after pulverization increased compared to those of control. Apparent viscosity value of rice starch after pulverization decreased to 7% in control based on $30^{\circ}C$ and 20 RPM conditions.

참고문헌 (Reference)

• 1 Sekino, T, "Transition metal dispersed oxide ceramic nanocomposities with multiple functions" 2 : 489-492, 1998
• 2 Page, "Thermal characterization of rice starches A polymericapproach to phase transitions of granular starch" 6-13, 1986
• 3 Lee, C, "Studies on the retrogradation properties of rice starch" 16 : 105-110, 2003
• 4 Lee, H. S, "Status and Prospectives of Food Industry" 10 : 24-35, 1997
• 5 Knutson, "Rapid Method forEstimation of Amylose in Maize Starches" 469-471, 1994
• 6 Kim, K. H, "R&D Trend and Information Analysis of Nanoparticles" 6 : 46-61, 2003
• 7 Suzuki, "PhysicochemicalStudies of Kuzu starch" 266-272, 1981
• 8 Han, J. S, "Physicochemical properties of corn starch oxidized with sodium hypochlorite" 31 : 189-195, 2002
• 9 Yoon, Y. H, "Particle size distribution and rheological properties of Australian noddle flours" 41 : 367-371, 1998
• 10 Kim, "Molecular structuralproperties of rice amylopectins" 34-38, 1990
• 11 Lim, S. T, "Modified Starch Using a Food" 10 : 51-67, 1997
• 12 Medcalf, "InMethods in Carbohydrate Chemistry" Academic press 4 : 1964
• 13 Application of complex carbohydrates to food product fat mimetics, "In Complex Carbohydrates in Foods" Marcel Dekker, Inc. 1999
• 14 Akoh, C. C, "Fat replacers" 52 : 47-53, 1998
• 15 Cho, S. Y, "Effect of extraction rate of Korean wheat flour on rheological and raw noodlemaking properties" 10 : 246-250, 2001
• 16 Hoover, "Effect of cross-linking onfunctional properties of legume starches" 149-155, 1986
• 17 Lee, S. Y, "Effect of alum on the rheological properties of gelatinized solutions of nonwaxy and waxy rice starches" 27 : 776-782, 1995
• 18 Park. D. J, "Development of Processing Technology for Physically modified Starch as Food Resources" 2005
• 19 Wong, "Comparison of thecrystallinities of wheat starches with different swellingcapacities" 159-161, 1982
• 20 "American Association of Cereal Chemists" 80 22-60 18,
• 21 Kim, K. Y, "A study on the molecular distribution of starch" 11 : 496-502, 2004