우리나라 재배지역별 야콘 생산성 및 기능성 프락토올리고당 평가

김수정,손황배,홍수영,남정환,장동칠,김기덕,서종택,구본철,김율호,Kim, Su Jeong,Sohn, Hwang Bae,Hong, Su Young,Nam, Jung Hwan,Chang, Dong Chil,Kim, Ki Deog,Suh, Jong Taek,Koo, Bon Cheol,Kim, Yul Ho 한국작물학회 2017 한국작물학회지 Vol.62 No.3

The purpose of this study was to investigate the effects of envrionmental factors on the ecological responses, yield, and quality properties and physicochemical characteristics of yacon cultivated in various regions of Korea. Experiments were carried out in eight regions from 2010 to 2013. The temperature range in Jinbu, Bonghwa, Cheolwon, and Gangneung during the growth period of yacon cultivation was $17.5-24.6^{\circ}C$. The total yield and marketable yield of tuberous root in Jinbu were 4,065 and 3,196 kg/10a, respectively. The sugar content of yacon tuberous roots comprised 0.11-0.20% fructose, 0.11-0.37% glucose, 0.39-0.68% sucrose, 0.07-0.37% reducing sugar, and 7.03-9.62% fructo-oligosaccharides. The content of fructo-oligosaccharides, which is a functional substance, was the highest in yacon cultivated in Jinbu. Based on the productivity and functional fructo-oligosaccharides, the optimum areas to cultivate yacon are Jinbu and Bonghwa, which are located in the middle-highland zone (500-560 m) and have a suitable growth temperature of $18-25^{\circ}C$. The results of the present study indicate that temperature could be the factor with the greatest influence on the root growth of yacon.

웹 정보시스템의 서비스 성능 향상을 위한 부하균형 모델 제안

김수정,백승구,김종근,Kim, Su-Jeong,Baek, Seung-Gu,Kim, Jong-Geun 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.11

In this paper, different methods of integrating heterogeneous network information systems into the Web are observed by comparing a cliented Java CGI model with a server-oriented CGI model. In addition, a load balanced(LB, for short) CGI model is proposed, which combines two models and decides its course of action depending on the load state of the web server, and compared with the other two models. Performance evaluation models for three models are also presented. The results of computer simulations indicate that the LB CGI model performs consistently well irrespective of system load or server performance.

메밀의 망실재배시 종자생산성 향상을 위한 수분곤충의 선발과 활용법 구명

김수정(Su Jeong Kim),손황배(Hwang Bae Sohn),남정환(Jeong Hwan Nam),이종남(Jong Nam Lee),서종택(Jong Taek Suh),장동칠(Dong Chil Chang),김율호(Yul Ho Kim) 한국자원식물학회 2022 한국자원식물학회지 Vol.35 No.1

This study investigated field data to understand the spatio-temporal distribution of pollinating insects and buckwheat flowers. We set the in-situ observation sites in different locations to get altitude and cropping system distribution data for five years (2016 to 2020) in Korea. Twenty-five different insect species, belonging to 8 orders, were recorded. Over the past five years, species from the orders Diptera and Hymenoptera were the principal visitors. Hymenoptera was mainly represented by honey bees (Apis cerana), while Diptera was represented by bean seed fly (Delia platura) and several other species. Some bees and other Hymenoptera species could, however, act as co-pollinators because of their high relative frequency and activity. Compared with open-field cultivation (conventional), the pollination mediating effect of flies and bees was superior in net house, so the yield was high, and it was also found to be slightly higher in the mixed treatment of flies and bees than in the single treatment. Based on the above results, flies and bees were found to be the most active pollinating insects in buckwheat and it is necessary to actively utilize the selected insects to improve buckwheat productivity. This relationship will be utilized in establishing the system of seed production on pollinating regulation of a primary plant.

전처리제가 절화 아이리스의 수명, 안토시아닌 함량과 peroxidase 활성에 미치는 영향

김수정(Su-Jeong Kim),남춘우(Chun-Woo Nam),서종택(Jong-Taek Suh),유동림(Dong-Lim Yoo),김기선(Ki-Sun Kim) 한국원예학회 2005 원예과학기술지 Vol.23 No.2

본 연구는 아이리스 수확 후 전처리제의 종류가 절화의 수명, 수분함량, 흡수량, 증산량, 수분균형, 생체중, 화색, 안토시아닌 함량 및 효소활성에 미치는 영향을 구명하기 위하여 수행되었다. 전처리제로 증류수(무처리)와 sucrose 3%, sucrose 3%+silver thiosulphate 0.4mM(sucrose+STS), sucrose 3%+8-hydroxyquinoline sulphate 200㎎ㆍL⁻¹ (sucrose+HQS), sucrose 3%+benzyl amino purine 100 ㎎ㆍL⁻¹(sucrose+BA), 1-metylcyclopropene 1,000nl L-1(1-MCP)를 사용하여 4℃에서 24시간 절화를 보관하였다가 증류수가 들어있는 삼각플라스크에 삽입 배치하였다. 절화수명은 무처리보다 sucrose+BA처리에서 4일 연장되어 가장 효과가 컸지만, sucrose+STS와 sucrose+HQS 처리에서는 sucrose+BA 처리보다 효과가 크지 않았다. 수분 흡수량과 증산량은 전처리제 사용시 수확 후 2~4일 동안 높게 유지되었다가 이후 감소하였으며, 특히 sucrose+BA 처리는 다른 처리보다 4일째가 가장 높게 유지되었다. 수분균형은 sucrose+BA 처리가 무처리보다 마이너스 값으로 늦게 떨어졌으며 높게 유지되었다. 꽃잎의 안토시아닌 함량은 sucrose+BA처리에서 무처리보다 3.5배 높았으며, 퇴색 및 노화도 지연되었다. 아이리스 줄기의 Peroxidase(POD) 활성도 sucrose+BA 처리에서 4일째 최고치를 나타내었다. 이상과 같이 sucrose+BA 처리에서 절화수명, 안토시아닌 함량 및 POD 활성이 높은 것은 BA가 갖고 있는 노화지연, 엽 황화 방지 및 광합성량 증진 효과 때문에 수분흡수량, 수분균형 및 생체중이 높게 유지되었기 때문으로 판단되었다. Pre-treatment solutions on vase life, water content, water uptake, anthocyanin content, and peroxidase activity of Iris hollandica ‘Blue Magic’ were investigated. The vase life of cut Iris treated with 3% sucrose plus 100 ㎎ㆍL⁻¹ benzyl amino-purine (Sucrose + BA) was extended 4 days longer than the control. The treatments of 3% sucrose plus 0.4 mM silver thiosulphate (Sucrose + STS) and 3% sucrose plus 200 ㎎ㆍL⁻¹ 8-hydroxyquinoline sulphate (Sucrose + HQS) did not markedly extend the vase life. The amounts of water uptake and transpiration by all the treatments decreased at 2 to 4 days after harvest, but the amounts of Sucrose + BA were higher than that of the control. The water balance of Sucrose + BA showed slower change to minus value than that of the control. Anthocyanin content in the flower petal treated with Sucrose + BA was 3.5 times higher than that the control. The Sucrose + BA treatment delayed petal discoloration and senescence. Peroxidase (POD) activities of all the treatments reached the maximum stage at the 4th day after the treatments and decreased thereafter. Sucrose + BA treatment showed the highest POD activity at the 4th day.

국내 수집 자생화의 고랭지 생육특성과 적응성 평가

김수정(Su Jeong Kim),안순영(Soonyoung Ahn),서종택(Jong Taek Suh),이창희(Chang Hee Lee),김기선(Ki Sun Kim) 한국원예학회 2009 한국원예학회 학술발표요지 Vol.2009 No.10

분화용토와 적심에 따른 자생 패랭이꽃류의 생장과 개화반응

김수정(Su-Jeong Kim),서종택(Jong-Tak Seo),남춘우(Chun-Woo Nam),홍수영(Su Young Hong) 한국원예학회 2001 한국원예학회 학술발표요지 Vol.2001 No.10

OSGi 서비스 플렛폼에서 사용자 접근제어를 위한 프레임워크와 사용자 관리 서비스

김수정 ( Su-jong Kim ),조은애 ( Eun-ae Cho ),문창주 ( Chang-joo Moon ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1

OSGi 는 이질적인 다양한 기술들이 존재하는 홈 네트워크 환경에서 상호 운영성을 보장하는 서비스 플렛폼을 제공한다. 사용자 접근제어는 홈 네트워크에서 반드시 해결해야 하는 보안의 핵심분야 중에 하나지만 아직은 구체적인 연구가 진행되고 있지 않다. 본 논문에서는 OSGi 서비스 플렛폼이 운영되는 홈 네트워크 환경에서 사용자 접근제어를 위한 RBAC 기반의 권한부여 정책 관리 플렛폼과 보완된 사용자 관리 서비스를 제안한다. 제시된 접근제어 프레임워크는 사용자의 프라이버시 문제를 해결함과 동시에 사용자 편의성도 제공을 한다. 또한 보완된 사용자 관리 서비스의 인터페이스는 요구되는 주요 기능들을 추가 함으로써 접근제어를 위한 OSGi 서비스 프레임워크 구현에 가이드 라인을 제공 한다.

기업집단의 최고경영자 활용 및 퇴출에 관한 연구

김수정(Su Jung Kim),박종훈(Jong Hun Park),김창수(Chang Su Kim) 한국경영학회 2012 經營學硏究 Vol.41 No.3

Unlike extant studies analyzing CEO turnover as an independent event of an individual firm, this study investigates CEO turnover and utilization in business groups. By choosing the cases in which CEO in an affiliated firm was changed, we examine the relationship between an affiliated firm performance and its CEO turnover at a business group level. At a business group level, CEO turnover can be broken down into ``transfer`` and ``weeding-out``. The former refers to the case in which the replaced CEO was utilized in another affiliated firm as CEO, whereas the latter refers to the case in which the replaced CEO was weeded out from the very business group. We develop the following hypotheses: Hypothesis 1: Group-affiliated firm performance is negatively associated with CEO weedingout from the business group. Hypothesis 2: There is a higher probability of CEO weeding-out in non-chaebol groups than in chaebol groups. Hypothesis 3: Chaebol groups negatively moderate the negative relationship between an affiliated firm performance and CEO weeding-out. Using the sample of KOSPI 200 firms belonging to business groups during 2001 and 2007, we found the negative relationship between an affiliated firm performance and CEO weedingout. However, there is no significant relationship between an affiliated firm performance and CEO transfer. As for hypothesis 2, it turned out to be a higher probability of CEO weeding-out in non-chaebol groups than in chaebol groups. We also found a negative moderating effect of chaebol groups in the relationship between an affiliate firm performance and its CEO weedingout. These results imply that there exists the internal labor market of large, diversified business groups. Accordingly, different types of business groups should be considered as a contextual variable. Chaebol, which is highly diversified, can utilize CEO-level workforce through its internal labor market. On the other hand, non-chaebol groups tend to recruit CEO-level managers from an external labor market. As a result, there exists higher probability of CEO weeding-out resulting from poor performance in non-chaebol groups than in chaebol groups.

쓴메밀 종자의 추출방법에 따른 루틴 및 퀘세틴 함량 비교

김수정(Su Jeong Kim),손황배(Hwang Bae Sohn),김금희(Geum Hee Kim),이유영(Yu Young Lee),홍수영(Su Young Hong),김기덕(Ki Deog Kim),남정환(Jeong Hwan Nam),장동칠(Dong Chil Chang),서종택(Jong Taek Suh),구본철(Bon Cheol Koo),김율호(Yul Ho 한국식품과학회 2017 한국식품과학회지 Vol.49 No.3

본 연구는 초고성능액체크로마토그래피(Ultra Performance Liquid Chromatography, UPLC)를 이용하여 쓴메밀 종자에서 루틴 및 퀘세틴 함량을 신속 정확히 평가하기 위한 효율적인 추출방법을 구명하고자 수행하였다. 추출방법으로 환류냉각추출, 초음파추출, 상온교반추출, 초음파후 환류냉각추출, 상온교반 후 환류냉각추출, 상온교반후 초음파추출, 상온교반과 초음파 후 환류냉각추출 등 7가지 방법을 비교하였다. 루틴 함량에서 7가지 추출방법은 통계적으로 유의한 차이를 보였으나, 퀘세틴 함량에서 추출방법 간 유의차가 없었다. 환류냉각추출의 루틴과 퀘세틴 함량은 각각 2,277, 158 mg/100 g으로 추출방법 중 함량이 가장 많아 추출수율이 높았으며 검출횟수도 가장 높았다. 반면, 초음파 추출의 루틴과 퀘세틴의 함량이 처리구 중 가장 낮았으며, 검출횟수도 가장 적었다. 환류냉각추출에서 일내 반복성(intra-day repeatablility)과 일간 정밀성(inter-day precision)은 상대적표준편차(relative standard deviation, RSD)가 0.4-3.2%로 안정적으로 추출되었고, 정확도는 88.8-102.4%로 국제적 회수율 권고치 기준에 부합하였다. 따라서, 쓴메밀 루틴 추출방법으로는 추출 소요시간이 1시간 이내로 짧으면서 루틴 함량이 가장 안정적으로 많이 추출되는 환류냉각추출이 가장 적합하였다. The stability and accuracy of ultra-performance liquid chromatography (UPLC) used for evaluating the contents of rutin and quercetin in tartary buckwheat (Fagopyrum tataricum Gaertn.) seeds extracted by seven different extraction methods were determined. The seven extraction methods were reflux extraction (RE), ultra-sonification extraction (UE), stirrer extraction (SE), RE after UE (UE+RE), RE after SE (SE+RE), UE after SE (SE+UE), and RE with UE after SE (SE+UE+RE). Among the seven extraction methods used, RE yielded comparatively higher contents of rutin (2,277 mg/100 g) and quercetin (158 mg/100 g) than those yielded by other six extraction methods. The intra-day repeatability and inter-day precision of RE was 0.4-3.2% considering relative standard deviation (RSD), while accuracy was 88.8-102.4%. Therefore, RE with UPLC would be a rapid, accurate, and stable method for analyzing rutin and quercetin contents in tartary buckwheat.

통합세척시스템 활용시 포장재 종류별 세척감자의 품질 특성

김수정(Su Jeong Kim),손황배(Hwang Bae Sohn),Manjulata Mekapogu,권오근(Oh Keun Kwon),홍수영(Su Young Hong),남정환(Jung Hwan Nam),진용익(Yong Ik Jin),장동칠(Dong Chil Chang),서종택(Jong Taek Suh),정진철(Jin Cheol Jeong),김율호(Yul H 한국식품과학회 2016 한국식품과학회지 Vol.48 No.3

우리나라에서 가장 많이 유통되고 있는 감자 품종인 ‘수미’를 사용하여 세척감자의 실용화를 위한 적정 포장재를 개발하고자 본 연구를 수행하였다. 세척감자의 포장재에 따른 품질특성의 변화를 구명하기 위해 무포장(NP, positive control), 종이봉투(PB, negative control), 양파망(ON), 무공투명비닐백(TP), 유공불투명비닐백(OP) 총 5종의 포장재를 대상으로 Hunter 값, 색차값(ΔE value), 총 엽록소 및 글리코알카로이드(PGA) 함량 등 품질 특성을 평가하였다. 그 결과, Hunter a값(적색도/녹색도)은 세척감자 저장 12일째에 양파망(ON)과 무공투명비닐백(TP)에서 −a값을 나타내 녹색도로 바뀌었다. 색차값은 무포장(NP)에서 높게 나타나 다른 포장재에 비해 녹화가 심했다. 총 엽록소 함량은 저장기간에 따라 뚜렷하게 증가하는 경향을 보였으며, 무포장에서 저장 15일째 가장 큰 증가를 보였다. 세척감자의 괴경 내피 부위의 PGA 함량은 모든 처리에서 저장 15일째 5 mg/100 g 이하로 낮았으며, 외피 부위에서도 4.5-9.3 mg/100 g으로 국제연합식량농업기구(FAO) 권장기준(20 mg/100 g)보다 낮았다. 녹화와 각 품질평가 요인의 상관성을 구명하기 위해, 피어슨 상관분석을 한 결과, 엽록소 함량은 색차값(0.90786)과 높은 정의 상관관계를 보였으나, Hunter a값은 색차값(−0.86021), 엽록소 함량(−0.85196)과는 높은 부의 상관관계를 보였다. 글리코알카로이드(PGA)와 녹색도 품질평가 요인과는 상관관계가 없는 것으로 나타났다. 이러한 엽록소 함량, 색도 색차와 PGA 함량 등의 결과를 바탕으로 녹화와 소비자 선호도를 고려할 때 평가항목에서 우수한 유공불투명포장재가 세척감자 소포장재로 유망할 것으로 판단되었다. This study was performed to investigate the effect of packaging materials on quality characteristics of washed potatoes such as Hunter’s a value, chlorophyll and potato glycoalkaloids (PGA) content during their storage for 15 days. Packaging methods were evaluated into five ways: no packaging (NP, positive control), paper bag (PB, negative control), onion net (ON), transparent oriented to polypropylene without hole (TP), opaque oriented polypropylene with 4 holes (OP). Hunter’s a values of washed potatoes showed minus in NP and TP after 12 days storage, whereas all plus values were observed in those of PB, ON, and OP. Total chlorophyll content of washed potatoes was the highest in no packaging at 15 days after storage. The PGA content of washed potatoes showed low levels in flesh part (below 5 mg/100 g · FW) as well as in peel part (4.5-9.3 mg/100 mg · FW) in all packagings up to 15 days after storage.