본 연구에서는 시멘트에 작용하는 아크릴 코폴리머의 화학반응을 통해 강한 점착성과 유연성을 가지는 친환경적인 폴리비닐아세테이트(PVAc)를 이용하여 수밀성을 향상시키는 복합공법의 가능성을 알아보고자 하였으며, 이를 위한 실험 방법으로 1차로 실리케아트계 침투성 방수제를 도포 한 후, 2차로 PVAc를 혼입한 모르타를 도포한 후에 부착강도 및 흡수량에 대한 특성을 검토하였다. 이 실험 결과를 토대로 하여 현장 적용을 위한 Mock-up 부재를 제작하였고, 이 시험 부재에 대하여 복합공법을 적용한 후 실내 시험과 동일한 성능을 검토하였다. 또한, 탄산화 및 염소 이온 침투저항성 평가를 실시하여 내구성이 취약한 환경에 적합한지 여부를 검토 하였다. 그 결과 PVAc를 이용한 복합공밥을 적용한 시험체가 수밀성능이 가장 우수하였으며, 부착강도 또한 우수한 성능을 나타내었다. 또한, 간이 Mock-up 부재에 대한 성능평가에서 실내 시험과 동일한 경향을 보였으며, 압축강도 시험결과 보강 효과를 발휘함을 알 수 있었다. 탄산화 및 염소 이온 침투저항성 내구 성능 평가에서 가장 우수한 결과를 나타내어 지하구조물 및 해양구조물 등과 같은 취약한 지역에 적용이 가능함을 확인 할 수 있었다.

Hybrid sterility is one of the major barrier to the application of wide crosses in plant breeding and is commonly encountered in crosses between indica and japonica rice varieties. Ten mapping populations comprised of two reciprocal F2 and eight BC1F1 populations generated from the cross between Ilpumbyeo (japonica) and Dasanbyeo (indica) were used to identify QTLs and to interpret the gametophytic factors involved in hybrid fertility or sterility between two subspecies. Frame maps were constructed using a total of 107 and 144 STS markers covering 12 rice chromosomes in two reciprocal F2 and eight BC1F1 populations, respectively. A total of 15 main-effect QTLs and 17 significant digenic- epistatic interactions controlling spikelet fertility (SF) were resolved in the the entire genome map of F2 BC1F1 populations . Among detected QTLs responsible for hybrid ferility, four QTLs, qSF5.1 and and qS F5.2 on chromosome 5, qSF6.2 on chromosome 6, and qSF12.2 on chromosome 12 were identified as major QTLs since they were located at corresponding position in at least three mapping populations. Loci qSF5.1, qSF6.1 and qSF6.2 were responsible for both female and male sterility, whereas qSF3.1, qSF7 and qSF 12.2 affected the spikelet fertility only through embryosac factors, and qSF9.1 did through pollen factors. Five new QTLs identified in this study will be helpful for understanding the hybrid sterility and for breeding programs via inter-subspecific hybridization.

Hybrid sterility is one of the major barrier to the application of wide crosses in plant breeding and is commonly encountered in crosses between indica and japonica rice varieties. Ten mapping populations comprised of two reciprocal F2 and eight BC1F1 populations generated from the cross between Ilpumbyeo (japonica) and Dasanbyeo (indica) were used to identify QTLs and to interpret the gametophytic factors involved in hybrid fertility or sterility between two subspecies. Frame maps were constructed using a total of 107 and 144 STS markers covering 12 rice chromosomes in two reciprocal F2 and eight BC1F1 populations, respectively. A total of 15 main-effect QTLs and 17 significant digenic- epistatic interactions controlling spikelet fertility (SF) were resolved in the the entire genome map of F2 BC1F1 populations . Among detected QTLs responsible for hybrid ferility, four QTLs, qSF5.1 and and qS F5.2 on chromosome 5, qSF6.2 on chromosome 6, and qSF12.2 on chromosome 12 were identified as major QTLs since they were located at corresponding position in at least three mapping populations. Loci qSF5.1, qSF6.1 and qSF6.2 were responsible for both female and male sterility, whereas qSF3.1, qSF7 and qSF 12.2 affected the spikelet fertility only through embryosac factors, and qSF9.1 did through pollen factors. Five new QTLs identified in this study will be helpful for understanding the hybrid sterility and for breeding programs via inter-subspecific hybridization.

Cucumber mosaic virus (CMV), which has the broadest host range among plant viruses, is a very destructive pathogen in pepper production. Various resistance sources against CMV have been identified by plant breeders. One of them is Capsicum annuum ‘Bukang’, which contains a single dominant resistance gene, Cmr1. C. annuum ‘Bukang’ is resistant to CMV-P0 strains (CMV-Kor and CMV-Fny), but susceptible to CMV-P1. CMV-P1 is a new strain recently identified in South Korea. Previously we showed that CMV-P1 RNA1 helicase domain is responsible for overcoming Cmr1 and may be play a role in viral replication and systemic infection. To identify the plant host factors involved in CMV-P1 replication and movement, we utilized a yeast two-hybrid system derived from C. annuum ‘Bukang’ cDNA library as a prey. A total of 78 potential host genes interacting with the CMV-P1 RNA1 helicase domain were isolated in the first screening, and PCR confirmation and sequencing analysis narrowed the candidates to ten genes. The candidate genes have found to be encoding acireductone dioxygenase, ADP-glucose pyrophosphorylase, ADP-ribosylation factor 1, ADP-ribosylation factor, calreticulin-3 precursor, cysteine synthase, formate dehydrogenase, histone-H3, phosphomannomutase and polyubiqutin 6PU11. Previous studies showed that these genes were involved in virus infection, replication or virus movement. To elucidate the function of these genes, VIGS and coimmumo precipitation assay is being done.

Sorghum is the fifth most important cereal in the world as one of the staple food. For the use of natural dye, we have done some researches about sorghum red pigments extracted from stalk and leaves on its physiochemical properties, extracting methods and applications. The researches involved maximum extraction of sorghum pigment and analysis of its processing condition. Total polyphenol and tannin contents were measured by varieties and different plant parts. The stabilities of pigment by irradiation and heat treatment for processing were measured by colorimeter and thermal gravimetric analysis (TGA). In addition, hybrid nano-silica composites with sorghum pigment were made by combining with polyvinyl alcohol, polyvinyl acetate and sodium silicate. Water silica hybrids with sorghum pigment were performed by emulsion treatment. Nano-silica particles were identified and measured their size to be about 200 ~ 400 nm by SEM analysis.

An Asiatic lily cultivar ‘Red Flame’ was developed in 2011 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), of Korea. The cross was made between female parents Lilium Asiatic ‘A01-78’ and male parents L. Asiatic ‘Rodrigo’ in 2001. Preliminarily selection was done as ‘A04-8’ in 2004. Multiplication and bulb formation, and characteristic tests were conducted from 2005 to 2010. The evaluation of this line was performed and named as ‘Wongyo C1-110’ in 2011. ‘Red Flame’ flowers at the first days of June and grows average 95.6 cm. It flowers upward-facing, dark red (RHS, R45A) with the size of flower 15.7 cm. Mean petal length and width is 9.7 cm and 3.0 cm, respectively. Leaves are 11 cm long and 1.7 cm wide, respectively. The weight and size of bulb is 52 g and 18 cm, respectively. Year-round flowering can be by storing the bulb under -1.5℃ conditions. For forcing culture, it is necessary to add calcium to the fertilizer or remove side scales to prevent leaf scorch. It is needed to control Botrytis disease in wet season.

An OTO intersectional hybrid lily cultivar ‘Flashy Party’ was developed in 2011 at National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), of Korea. The cross was made between female parents Lilium OT intersectional hybrid ‘Avocado’ and male parents L. Oriental hybrid ‘Acapulco’ in 2005. Preliminarily selection was done as ‘OTO-08-3’ in 2008. Multiplication and bulb formation, and characteristic tests were conducted from 2008 to 2010. The evaluation of this line was performed and named as ‘Flashy Party (Wongyo C1-113)’ in 2011. ‘Flashy Party’ flowers in the end of June and grows average 131 cm. It flowers semi upward-facing, Red-light yellow color(RHS, R47A+Y8C) with the size of flower 21.5 cm. Mean outer-petal length and width is 15 cm and 4.7 cm, respectively. Leaves are 20 cm long and 3.3 cm wide, respectively. The weight and size of bulb is 65.3 g and 18 cm, respectively. Year-round flowering can be by storing the bulb under -1.5℃ conditions. For forcing culture, it is necessary to add calcium to the fertilizer or remove side scales to prevent leaf scorch. It is needed to control Botrytis disease in wet season.

복합 병렬 전단벽(Coupled shear walls)은 커플링 보와 철근콘크리트 벽체로 구성되어 바람이나 지진 등의 횡하중으로부터 유발된 전도모멘트의 상당 부분을 철골 연결보의 커플링 작용에 의하여 골조 작용(Frame action)을 의하여 횡력에 효율적으로 저항하게 된다. 본 연구에서는 접합부 상세에 따른 복합병렬 전단벽의 접합부 강도에 대한 규준식을 정립하기 위한 선행연구로서 병렬 전단벽 접합부에서 커플링 보의 매립길이 및 벽체 두께를 주변수로 실험적 연구를 수행하여 접합부 상세에 따른 복합 병렬 전단벽 시스템의 거동특성을 규명하고자 하였다. 본 실험결과, 실험체의 거동 및 내력은 매립길이 및 접합부 상세에 많은 영향을 받는 것으로 나타났으며 향후 설계시 이에 대한 영향을 반영해야 할 것으로 판단된다.

The objective of this study is to investigate the behavior and strain characteristics of steel coupling beam-wall connection. Test variable of this study is embedment length of steel coupling beam in the embedment region. The results showed that Specimens PSH2C-ST and PSH2C-ST experienced bearing failure, based on the observation of strain of concrete in the embedment region.

This paper presents the results of a study performed to evaluate uniaxial tensile performance and obtain a better understanding of the behavior of SHCC using an expansive admixture. To evaluate a performance of SHCC using an expansive admixture was tested a compressive strength, flexural strength, and uniaxial tensile strength.

This study proposed a hybrid floating structure which is expected to have better structural behavior than general pontoon type structure. Using structural analysis, the performance of the structure was investigated. We tried to find the optimal system of this hybrid floating structure system.

The objective of this study is to investigate the seismic performance of hybrid coupled shear wall connection with new toughness material, pseudo strain hardening cementitious composites (PSH2C). Test variable of this study is the embedment length of steel coupling in connection region. The results showed that Specimen PSH2C-ST with longer embedment length of steel coupling beam exhibits good seismic performance than Specimen PSH2C-STE.

분화용 바위떡풀 신품종 '핑클(Pinkle)'은 화색이 연한 핑크색 품종인 '주노(朱鷺, Juno)'를 모본으로 하고 역시 핑크색인 품종인 '홍완(紅完, Hongan)'을 부본으로 하여 2004년 2월에서 4월까지 인공교배하여 종자를 얻었다. 2005년에 개화특성을 보고 4072호를 선발하였으며 포기 나누기를 하여 2005~2008년까지 증식을 하였다. 동시에 2005년~2008년까지 시설 내에서 재배를 하면서 특성검정을 한 후 최종적으로 선발하여 '핑클(Pinkle)'품종으로 명명하였다. '핑클'은 개화는 10월 7일부터 시작하여 11월 상순까지 약 27일간 100개 정도의 꽃을 피우며 화경수는 4.4개로 적지만 화경장은 15.8 cm로 안정적이었다. 화색은 진분홍색(R-P N66C)을 띠며 화경색은 붉은 색이다. 화장과 화폭이 대조품종보다 약간 큰 편이고 5개의 꽃잎이 큰대(大)자형으로 배열한다.

In order to produce the organic foods in accord with international standard, organic seeds should be used in organic farming. This study was conducted to establish the stable production of organic seed of waxy corn by examining the growing characteristics, seed yield, and the economy for seed production by organic farming. The optimal sowing timing for organic seed production of waxy corn hybrid was within 10 days of the 1st of May with yield of 88~90% of conventional seed production. The optimal planting density was 41,600 plants/ha (80×30 cm) for organic seed production of waxy corn. The weight of 100 seeds and seed productivity increased at the planting ratio of 2:1 mother plant:male plant. Growth and seed production were improved by removing male plant at 7~10 days after silking. Organic fertilizer (mixed oil cake) was applied at a rate of 4~6 Mg/ha before sowing. Black plastic mulching was used for weed control. In addition, sex pheromone trap and bio-control agents were used for safe pest control and low labour cost.

얼룩찰1호'는 자식계통 KBW23을 종자친으로 하고 KW33을 화분친으로 하여 교잡된 단교잡종이며 알맹이가 흰색과 검정색의 두 가지 색을 가진 얼룩찰 옥수수이다. '얼룩찰1호'는 2003년 생산력검정시험을 거쳐, 2005년부터 2007년까지 3년 동안 전국 5개 지역에서 지역적응시험을 실시한 결과 그 우수성이 인정되어 2007년 농작물 직무육성 신품종으로 결정되었다. 이 품종의 주요특성을 요약하면 다음과 같다. 1. '얼룩찰1호'의 출사일수는 76일로

골든센터' 품종은 국립원예특작과학원에서 2008년에 육성된 절화용 FA 아속간 잡종 나리 이다. 연황색 FA 잡종인 'Migreen' 품종을 모본으로 하고, 적색의 아시아틱나리 'Sanzio'품종을 부본으로 교배하였다. 6주 후에 미숙 꼬투리를 채취하여 기내에서 배주 배양하여 2004년 'FA04-24'계통을 선발하였다. 이 계통은 2005년부터 조직배양에 의한 대량증식, 순화 및 양구를 거쳐 2007년까지 생육 및 특성검정을 수행하였다. '골든센터'

최근 중앙경간 일부를 강박스 거더로 대체하여 자중을 감소시켜 중앙경간의 장경간화를 시도한 교량형식인 콘크리트-강 복합 엑스트라도즈드교는 기존 엑스트라도즈드 교량을 개선하기 위한 대안으로 제시되고 있다. 콘크리트- 강 복합 엑스트라도즈드교는 자중 감소를 통해 중앙경간의 장경간화가 가능할 뿐 아니라 기존형식과 동일한 경우 주거더의 높이와 측경간을 감소시킬 수 있어 구조적 효율성이 매우 우수한 형식으로 평가되고 있다. 따라서 콘크리트-강 복합 엑스트라도즈드교에 대한 최적의 설계기법을 구축하는 것이 매우 중요하다. 이를 위하여 본 연구에서는 콘크리트-강 복합 엑스트라도즈드교에 대한 주요 설계변수(주탑 높이, 주거더 높이 및 강상판 거더 길이)를 도출하고, 이를 바탕으로 설계변수별 수치해석과 그 결과를 이용한 설계변수별 민감도 분석을 실시하여 설계변수가 교량의 설계에 미치는 영향을 정량적으로 반영할 수 있는 설계가중값을 도출하였다.