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이경행,백병선,Lee, Kyoung Haing,Baek, Byung Sun 항공우주시스템공학회 2016 항공우주시스템공학회지 Vol.10 No.3
This paper describes the operational concept of the Aegis ship's missile defense. Recently, North Korea conducted a fourth nuclear-weapon test that involved the launch of a long-range missile and the underwater launch of an SLBM. The ground-based BMD (Ballistic Missile Defense) system is very limited for the SLBM of a miniaturized nuclear warhead; therefore, it is necessary to build a reliable sea-based missile-defense system. The ROK Navy has, however, only utilized the Aegis ship that is designed with a search-and-tracking sensor but is without a ballistic-missile interception capability. Given this information, this work focuses on the operational concept of the Aegis BMD by comparing the BMD capabilities of the ROK with those of the U.S.
사과와 꽃사과의 구성 아미노산, 무기질 조성 및 항산화 활성 비교
이경행,유광원,배윤정,주가영,김채영,Lee, Kyung-Haeng,Yu, Kwang-Won,Bae, Yun-Jung,Joo, Ga-Young,Kim, Chae-Young 한국식품영양학회 2022 韓國食品營養學會誌 Vol.35 No.5
To confirm the applicability of crab apple, the composition and content of amino acids and minerals with 'Fuji' apple were measured. Apple and crab apple were extracted with water, 70% and 100% ethanol, respectively. The contents of polyphenols, flavonoids, and ascorbic acid, antioxidant activities of these extracts were measured. The amino acid composition of apples comprised a total of 17 amino acids. The total amino acid contents of apple and crab apple were 2,050.45 mg/kg and 900.05 mg/kg, respectively. For minerals, the total mineral content of apple and crab apple were 489.14 mg%, 529.77 mg%, respectively. The contents of polyphenols, flavonoids, and ascorbic acid of apple and crab apple extracts were highest in 70% ethanol extracts. The content of polyphenols, the crab apple extract, showed a generally higher content than the apple extract. The content of flavonoids, apple and crab apple extracts revealed no difference between extracts. The content of ascorbic acid, apple extract showed a generally higher content than the crab apple extract, but there was no significant difference between extracts. In the case of DPPH and ABTS radical scavenging abilities, 70% ethanol extract showed the highest antioxidant activity, and crab apple showed higher activity than apple extracts.
멀티 유화 기술 이용 수분산성의 항산화 효능을 함유한 커큐민의 개발
이경행,이은현 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.6
Curcumin is not soluble in water. Therefore, curcumin emulsion that can dissolve well in water were prepared using multi-emulsification technology, and the antioxidant activities and physical properties of emulsion were measured. Although curcumin was not dissolved in water, it was confirmed to be well dispersed in water when prepared in an aqueous dispersion curcumin emulsion. After dissolving curcumin using water and ethanol as solvents, respectively, the DPPH and ABTS radical scavenging abilities of the filtrate and the curcumin emulsion were measured. Because it was not dissolved in water, activities were not shown. However, when curcumin was dissolved in ethanol, the activities increased as the concentration of curcumin increased. On the other hand, when the curcumin emulsion was dissolved in water, it was found to have abilities. The curcumin emulsion was nano-homogenized and the size and distribution of the emulsified spheres were measured. It was confirmed to be nano-sized as it appeared as 9.083 nm/100%. In the results of the DPPH radical and ABTS radical scavenging abilities of curcumin nano-emulsion, it was confirmed that there was no change in the antioxidant abilities. In conclusion, water-dispersible curcumin prepared using multi-emulsification technology, and it was confirmed to exhibit antioxidant activity and emulsion stability.
이경행,Lee, Kyung-Haeng 한국식품영양학회 2015 韓國食品營養學會誌 Vol.28 No.2
쌀밥 위주의 식사에서 곡류 또는 두류를 혼합한 잡곡밥의 섭취량이 늘고 있는 추세로 백미(대조군)와 혼합잡곡(혼합잡곡 1), 혼합잡곡에 정미성분을 가미한 잡곡(혼합잡곡 2)을 제조하고, 이들의 항산화 활성을 갖는 성분들의 함량 변화와 기호도 변화를 측정하였다. Ascorbic acid의 함량에서는 백미의 경우, 6.68 mg%, 혼합잡곡군은 각각 18.23 및 21.84 mg%로 잡곡을 혼합하였을 때 높은 함량을 나타내었다. Tocopherol류의 함량에서는 백미는 1.26 mg%, 혼합잡곡 1군은 19.24 mg%이었고, 혼합잡곡에 정미성분을 가미한 혼합잡곡 2군은 39.32 mg%로 가장 높은 tocopherol류의 함량을 보였다. Polyphenol 화합물의 함량에서 대조군은 2.20 mg%, 혼합잡곡군은 각각 14.38 및 21.91 mg%로 혼합잡곡군이 높은 함량을 보였다. Flavonoid 화합물의 함량은 대조군에서는 검출되지 않았지만, 혼합잡곡 1군은 42.45 mg%, 혼합잡곡 2군은 32.54 mg%로 잡곡 혼합 시 높은 함량을 나타내었으며, 이들 성분들은 메탄올 추출물에서도 유사한 경향이었다. 기호도에서는 맛, 향, 색 및 종합적 기호도에서는 모두 정미성분을 첨가하였던 혼합잡곡 2군이 가장 높은 기호도를 보였고, 잡곡밥, 백미의 순으로 백미보다는 곡류 및 두류 및 정미성분을 혼합하는 것을 더욱 선호하였다. To improve functionality of rice, we manufactured mixed cereals and mixed cereals with taste materials and evaluated their antioxidant component (ascorbic acid, tocopherols, polyphenols and flavonoids) contents and sensory evaluation. Ascorbic acid content in water extract of the control was 6.68 mg%, and mixed cereals were 18.23 and 21.84 mg%, respectively. Ascorbic acid content in methanol extract of the control was lower than those of mixed cereals too. ${\beta}$-Tocopherol was the only tocopherol detected in the control. However, tocopherols detected in mixed cereals were ${\alpha}$-, ${\beta}$-. ${\gamma}$-, ${\delta}$-tocopherol and ${\alpha}$-, ${\gamma}$-tocotrienol, with a highest content of ${\gamma}$-tocopherol. Total tocophenols content of the control was 1.26 mg%, whereas, those of mixed cereals were 19.24 and 39.32 mg%, respectively. Polyphenols contents in water extract of the control was 2.20 mg%, and mixed cereals were 14.38 and 21.91 mg%, respectively. In addition, polyphenols contents in methanol extract of mixed cereals were higher than that of the control, too. Flavonoids were undetected in water extract of the control, but flavonoids contents of mixed cereals were 42.45 and 32.54 mg%, respectively. In methanol extracts, flavonoids contents of the control and mixed cereals were not significantly different. The sensory parameters including taste, flavor, color, texture and overall acceptance of control were lower than those of mixed cereals. Especially, mixed cereals with taste materials was the highest acceptance.