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Kinetic Study on the Color Deterioration of Crude Anthocyanin Extract from Schizandra Fruit (Schizandra chinensis fructus) (오미자 색소 추출물의 가열 변색에 대한 속도론적 연구)

  • Cho, Sung-Bin;Kim, Hyun-Jung;Yoon, Jong-Il;Chun, Hyang-Sook
    • Korean Journal of Food Science and Technology
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    • v.35 no.1
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    • pp.23-27
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    • 2003
  • The effects of temperature and pH on color deterioration of anthocyanin in Schizandra fruit (Schizandra chinensis fructus) were determined with temperature range of $80{\sim}100^{\circ}C$ and pH range of $2.0{\sim}5.0$. Browning index was used as an index of color deterioration of crude anthocyanin extract from Schizandra fruit. As pH of crude anthocyanin extract was increased, color deterioration was accelerated, showing pH-dependency of thermal stability of anthocyanin extract from Schizandra fruit. Anthocyanin degradation could be modeled as a second-order rate reaction, with rate of $3.2{\times}10^{-3}\;h^{-1}\;(pH\;2.0){\sim}4.1{\times}10^{-3}\;h^{-1}\;(pH\;5.0)\;at\;100^{\circ}C$. Temperature dependence of deterioration was described by the Arrhenius relationship. Activation energies for pH $2.0{\sim}5.0$ ranged from $24.87{\sim}42.54\;kJ/mol^{-1}$.

A study on the health status of physical therapy college mans (물리치료과 학생의 건강 상태에 대한 연구)

  • YOUN Hee-Jong;LEE In-Hak
    • The Journal of Korean Physical Therapy
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    • v.3 no.1
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    • pp.59-73
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    • 1991
  • The purpose of this study was to phychosomatic health status of physical therapy college mans. 130college mans analysis sex, habitation, religion, blood type, drinking, somoking by the todai health index questionaire. THI was modified front cornell medical index. Physical therapy college man showed complain score (E) Nervousness. (J) Mental irritability. (H) Impulsiveness. (F) Aggressiveness. (G) Irregular life (I), (L) Multiple subjective symtom(I), Live scale(L), (K) Depression. (C) Digestive, (A), (B) Respiratory(A), Eye and Skin(B). (D) Mouth and Anus.

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Modification of KOCC with Ultrasonic Wave Treatment (초음파처리에 의한 KOCC의 개질)

  • Ming, He;Lee, Yong-Kyu;Won, Jong Myoung
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.45 no.5
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    • pp.44-48
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    • 2013
  • Ultrasonic treatment of KOCC was tried to explore the possibility for improvement of KOCC quality as a raw material for making industrial packaging paper and paperboard. The effect of pH, stock consistencies and treatment times on the ultrasonic response of KOCC were investigated. WRV, apparent density, tensile index and burst index were improved as pH of KOCC slurry is increased. However highest tear index and stiffness were obtained at pH 8. It was also found that the highest WRV and strength properties could be obtained at 0.5% of KOCC consistency during ultrasonic treatment. WRV and most strength properties were improved with ultrasonic treatment time. It was found that ultrasonic treatment can be used as a useful mean for KOCC modificaton.