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배시연,장채민,박수원,이현준,이지현,이광원,김현석 한국산업식품공학회 2023 산업 식품공학 Vol.27 No.4
This study investigated the changes in the cyanogenic glycoside (CN-Glc) content of maesil chung (MC) prepared according to its preparation conditions (i.e., maesil part, sugar type, maesil-sugar mixing ratio, liquid separation) and sugaring-ripening period and the quality characteristics of their products finalized through filtration and heat treatment (85o C, 30 min) with the 6-month ripened MC. The CN-Glc content dramatically decreased when the maesil flesh, isomaltooligosaccharide, maesil:sugar ratio of 5:5, and liquid separation after the 4-month sugaring were applied to the MC production. The CN-Glc content decreased with the ripening period. There was no effect of filtration and heat treatment on the CN-Glc reduction of the MC product. The sugar type predominantly affected the soluble solid and total carbohydrate content of the MC products, and their contents increased in the order of high-fructose corn syrup > sucrose > isomaltooligosaccharide. The MC product at a maesil:sugar ratio of 6:4 exhibited the higher organic acid content. There was no direct association between the total polyphenolic compound content and the preparation conditions of the MC product. Overall, the use of maesil flesh as a maesil ingredient and more than 6-month ripening after liquid separation may be a pivotal factor in producing the cyanogenic glycoside-reduced maesil chung.
살구청과 자두청의 제조조건에 따른 시안배당체 함량과 품질 특성
배시연,장채민,박수원,이현준,이지현,이광원,김현석 한국산업식품공학회 2023 산업 식품공학 Vol.27 No.4
The objective of this study was to investigate changes in the cyanogenic glycoside (CN-Glc) content of apricot and plum chungs over the sugaring-ripening period and to evaluate their quality characteristics. The whole and flesh parts of the apricot and plum were mixed with sugar to a mixing ratio of 1:1 (w/w) to prepare their chungs, after which the fruit-sugar mixtures were stored for 13 months. The CN-Glc content dramatically increased within 3-4 months, reached the maximum, and gradually decreased over storage by 13 months. The apricot and plum chungs with seeds exhibited much higher CN-Glc contents than those without seeds. All chungs stored for 10 months were filtrated and treated for 30 min at 85o C to measure their quality characteristics. Similar soluble solid contents (53.4- 53.6o Bx) were found in all chungs. The apricot and plum chungs without seeds exhibited the higher concentrations of total carbohydrate, organic acid, and total polyphenolic compounds than those with seeds. In addition, the color of the apricot and plum chungs without seeds was darker and deeper yellow than those with seeds. Overall, the apricot and plum flesh may be better for producing the stone fruit chungs with minimal CN-Glc content and better nutrition.
P92강의 피로 균열 성장 속도에 미치는 산화와 주파수의 영향
배시연(Siyeon Bae),강형구(Hyounggoo Kang),윤학수(Haksu Yun),이동복(Dongbok Lee),김찬우(Chanwoo Kim),임병수(Byeongsoo Lim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Fatigue crack growth behavior is affected by various factors. In this study, the influence of oxidation, temperature and frequency on fatigue crack growth rate had been studied for P92 alloy steel. The test of fatigue crack growth rate was carried out at temperature ranging from 550℃ to 700℃ and frequency 20Hz and 0.1Hz using compact tension specimen. As the temperature increased or load frequency decreased, fatigue crack growth rate was increased. Isothermal oxidation test was conducted at 550, 600, 650 and 700℃ for 500 hrs respectively. The oxide scale was increased as the temperature increased. The oxide scale consisted primarily of Fe₂O₃. Finally, an investigation was conducted to find relationship between fatigue crack growth and oxidation at various frequencies and temperatures.
위상배열 초음파를 이용한 내부 균열 및 미세 결함 검사
배시연(Siyeon Bae),정찬서(Chanseo Jeong),임병수(Byeongsoo Lim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The cavity nucleation, growth and coalescence are very important factors in analyzing creep characteristics. In the uniaxial creep tests, the size of cavity increased with increasing strain when stress and temperature were changed. In the case of creep crack growth, the size and number of cavities changed with the nucleation and coalescence, and the changes in crack growth and load line displacement rate followed. This resulted in the change in da/dt vs C_t. The inner defects of P92 and P122 steels were investigated by Intelligent Phased Array Ultrasonic Inspection System. The PAULI system was found to be capable of detecting the creep crack length and crack tip defects, and confirmed ultrasonic characteristics of the cavity on crack tip.
배시연(Si-yeon Bae) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
There are strong environmental and economic pressures to increase the thermal efficiency of fossil fuel power stations and this has led to a steady increase in steam temperatures and pressures resulting in worldwide plans for ultra super-critical power plants. For examplem, order to improve the thermal efficiency of power plant, there has been a strong drive to develop heat resistant steels with excellent creep, high temperature fatigue and thermal fatigue resistant properties as well as superior oxidation and corrosion resistant properties. In this study, the test material was P122 alloy which has been developed for ultra super-critical power plant. To measure fatigue crack growth at three different microstructures (Base metal, HAZ and Weld metal) regions. Tests were performed with compact tension specimens at 600~700℃ with the loading frequency of 20Hz.
배시연 ( Si Yeon Bae ),이경희 ( Kyoung Hee Lee ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.2
This study was initiated to understand design and detail characteristics of coats that targeted new senior women by analyzing shape, color, fabric and detail. For the new senior, youthful appearance has more appeal than products that represent elder``s style. Among , the coat can be effectively utilized as a trendy fashion item that targets seniors since it is more useful to hide figures than pants, blouses or jackets. The objectives of this research were to: First, examine design characteristics of new senior women’s coat. Second, understand design characteristics of new senior women’s coat. Third, analyze the relationship between the design of collars and details according to type of new senior women’s coat. Photographs collected were categorized according to type of coat. Three types of coat (balmacaan, redingote and trench) were chosen to analyze with the highest frequency. The results of analyzing shape, length, color and fabric of the products made in domestic and foreign brands were similar; however, the collar and way of fastening showed significant results that required specific analysis since the design elements were related to maincoat characteristics in protecting against the cold. The depth of the V-zone can change without change of collar width and design changes in V-zone that influence the coat image that lead to changes in sleeve type and length (or fastening and closing position) method.