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Manufacture and characterization of optimized red ginseng drinks containing herbal medicine extracts
김학정,백무열,양병욱,김병용,김해경 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.5
The optimum mixing ratio of red ginseng, herbal medicine extracts, and oligosaccharides for diabetic improvement was investigated and verified through animal experiments. Using the optimum mixing technique, 2% red ginseng extract, 15% oligosaccharides, and 83% herbal medicine extracts were determined to be optimal for red ginseng beverages. The taste was improved as the amount of red ginseng decreased and oligosaccharides increased, whereas antioxidative activity was increased with increased red ginseng. In the animal model in which streptozotocin was administered to BALB-c mice, the red ginseng administration group exhibited lower blood glucose than the diabetic control group, and the blood glucose level was lower in the herbal medicine and red ginseng extract administration group. Insulin concentration was slightly increased by the red ginseng beverage, and hepatotoxicity due to excessive intake of red ginseng beverages was not detected.
김학정,김병용,Sundaram Gunasekaran,박재원,윤원병 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.6
Concentration dependence of mechanicalmodulus of two biopolymer systems, i.e., xanthan-locustbean (X/L) mixture and fish muscle protein (surimi) wasevaluated and compared at a wide range of polymerconcentrations. A small amplitude oscillatory shear testwas performed to measure changes in storage (G') modulusduring gelation and after gelation. Critical concentration(Cc) of the X/L mixture and surimi gel was determined tobe 0.15 g/100 mL of solvent and 2.04 g/100 g of solvent,respectively. Reduced concentration (CR=CL/Cc) was usedto compare the power-law dependence of modulus of thetwo systems. The elasticity exponent of the X/L mixtureand surimi gel was determined to be 2.4 and 1.97,respectively. The concentration dependence of twobiopolymer gel systems such as physical gels (X/L) andchemicals gels (fish muscle protein) theoreticallydemonstrated that the difference of flexibility of junctionsin the networks might distinguish the elasticity of each gel.
초음파의 지연 시간을 이용한 두부 조직의 물성변화 예측에 관한 연구
김학정(Hak Jung Kim),김병용(Byung Yong Kim),함영태(Young Tae Hahm) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.4
Changes in the physical properties of soybean curd upon the processing conditions such as coagulant concentration, heating temperature and molding pressure were determined by using a failure stress and residual delay time of ultrasonic wave(5 ㎒). Maximum failure stress of Tofu was obtained at the 0.3% CaCl₂ coagulant concentration, 95℃ heating temperature and greater molding pressure, respectively, whereas the delay time is inverse proportion to the failure stress value. The results of the multiple regression analysis with factorial design showed that the model equation consisted with delay time and processing conditions gave the good prediction of the Tofu failure stress.
아리랑 2호의 방사능 환경 및 영향에 관한 분석(I)- TOTAL IONIZING DOSE 영향 중심으로 -
백명진,김학정 한국우주과학회 2001 Journal of Astronomy and Space Sciences Vol.18 No.2
본 논문에서는 아리랑 2호가 운용될 궤도의 우주방사능 환경 및 total ionizing dose(TID) 영향에 대하여 분석하였다. 포획된 양자의 경우 SAA(South Atlantic Anomaly) 지역에 집중되어 있음을 알 수 있었으며, TID에 영향을 미치는 우주 방사능은 포획된 양자 및 전자와 태양양자임을 알 수 있었다. 저 에너지 입자는 알루미늄 차단 구조물을 이용하여 방사능 영향을 효과적으로 차단할 수 있음을 알 수 있었으나, 고 에너지 입자의 경우 구조물의 두께를 증가하여도 방사능 영향을 효과적으로 차단할 수 없음을 알 수 있었다. 아리랑 2호의 임무수명기간 동안 전자부품에 계속적으로 피폭되는 전체 방사량을 알루미늄 차단두께의 함수로 나타내었으며, 이 값들은 아리랑 2호의 전자부품의 선택기준 및 위성체 또는 구성품의 구조물 두께를 설정할 수 있는 기준으로 제시하였다. In this paper, space radiation environment and total ionizing dose(TID) effect have been analyzed for the KOMPSAT-2 operational orbit. It has been revealed that the trapped protons are concentrated in the SAA(South Atlantic Anomaly) area and that the trapped protons and electrons, and solar protons are main factors affecting TID. It turned out that low energy Particles can be effectively blocked by aluminum shielding thickness, but high energy Particles can not be effectively blocked by increasing aluminum shielding thickness. KOMPSAT-2 total radiation dose which is accumulated continuously to spacecraft electronics has been expressed as the function of aluminum thickness. These values ran be used as the criteria for the selection of electronic parts and shielding thinkness of the KOMPSAT-2 structure or electronic box.