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금속 와이어의 무구속 열간 인발 특성 -스테인레스강 와이어와 구리 와이어-
하보근,김종성,백영남,허유,Ha, Bo-Keun,Kim, Jong-Seong,Paik, Young-Nam,Huh, You 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.5
Micro-sized metal fibers are suitable for multi-functional and high performance industrial components, but the fiber manufacturing process relies heavily on wire drawing with dies, which can cause die-raw material friction. An alternative for the efficient production of the metal fibers is to use dieless wire drawing technology. This paper reports the characteristic differences of the dieless wire drawing process, which relies on forced necking. The hot working principle was applied to the most frequently used raw materials, stainless steel and copper, while a microwave furnace and susceptor were employed. The experimental trials showed that stainless steel wires could be more advantageous in dieless drawing than copper wires in that the necking of the stainless steel wire took place in a narrower zone than copper. Furthermore, a mathematical model was set up considering volume heating and wire cooling and combining the temperature effect of viscosity in Arrhenius form with the plastic deformation in Bingham form. The model showed good agreement with the experiments when the process was carried out in a steady state at various draw ratios and process speeds. These results suggest that the theoretical model can depict the real process quite well.
김지민(Ji-Min Kim),신일섭(Ilseob Shin),이정동(Jeong-Dong Lee),하보근(Bo-Keun Ha),이주석(Juseok Lee),정명근(Myoung-Gun Choung),문중경(Jung-Kyung Moon),강성택(Sungteag Kang) 한국육종학회 2021 한국육종학회지 Vol.53 No.1
A black soybean cultivar called ‘Noksim’ was developed using pedigree selection by crossing ‘Ilpumgeomjeong’ (SLSB87-3 × YS558)and ‘PI547426’. A p reliminary y ield t rial (PYT), advanced y ield t rial (AYT), and regional y ield t rial (RYT) were conducted in t hree regions. ‘Noksim’ has a determinate growth habit, purple flowers, and spherical seeds. In the regional yield trial, the flowering and maturity datesof ‘Noksim’ were August 4 and October 13, respectively, and its 100-seed weight was 26.5 g, which was lower than that of ‘Chungja 3’(36.5 g). Additionally, ‘Noksim’ showed resistance to lodging, soybean mosaic virus (SMV), bacterial blight, and pod shattering. In termsof the seed quality, the chlorophyll content of ‘Noksim’ was 71.19%, which was higher than that of ‘Chungja 3’ (50.78%), and its totalanthocy anin c ontent w as 2 5.17 m g/100g, w hich w as t hree t imes more than t hat of ‘Chungja 3’. The mean y ield o f ‘Noksim’ i n RYT was2.35 ton/ha, which was 18% greater than that of ‘Chungja 3’. ‘Noksim’ is suitable for cooking with rice and soy products such as soymilkbecause of its high brix degree (35 Brix) after cooking with rice, as well as its soymilk yield (71.2%). Overall, ‘Noksim’ has dark greencotyledons with a black seed coat that is preferred by consumers, and its early maturity with pod shattering resistance results in an increasedseed yield. (Registration No. 7734).
방사선 육종에 의한 화색변이 무궁화 신품종 ‘다솜’ 육성
김상훈(Sang Hoon Kim),김동섭(Dong Sub Kim),김진백(Jin-Baek Kim),하보근(Bo-Keun Ha),이덕만(Duk Man Lee),송희섭(Hi Sup Song),강시용(Si-Yong Kang) 한국원예학회 2015 원예과학기술지 Vol.33 No.2
무궁화 ‘다솜’은 1993년에 채종한 ‘홍순’ 종자를 이듬해에 한국원자력연구원 감마선 저준위조사시설에서 감마선 100㏉를 조사하여 1998년에 가로수용으로 유망한 우수한 화색을 가진 개체를 1차 선발하였다. 2005년부터 2010년까지 6년에 걸쳐 선발 계통의 균일성과 안정성을 검정하였다. 무궁화 ‘다솜’의 주요특성으로 초장은 106㎝로 길며, 분지수는 19개로 많은 편이고 가지는 상향으로 갈색을 띈다. 꽃은 홍단심계 반겹꽃으로 옅은 적색을 띄고, 꽃잎의 길이(4.0㎝)와 폭(3.3㎝)은 중간 정도이나 꽃잎의 겹침 정도가 강하여 전체적인 꽃의 직경(5.8㎝)은 다소 작은 편이다. 개화시간은 17시간 정도로 다른 품종들과 유사하나, 개화일수는 105일로 대조품종인 ‘홍순’(111일)에 비해 짧은 편이다. 잎의 모양을 비롯한 주요 특성은 ‘홍순’과 유사하다. A new Hibiscus syriacus variety, ‘Dasom’, was developed by radiation breeding using gamma ray exposure at the Korea Atomic Energy Research Institute (KAERI). Seeds of the original variety, ‘Hongsun’, were collected in 1993. These seeds were irradiated at 100 Gy dose and M1 seeds w ere planted in a f ield of the KAERI in 1994. Lines w ith preferred flower color t hat were going to be used for street trees were initially selected in 1998. Analyses of characteristics were conducted from 2005 to 2010. The 5-year-old ‘Dasom’ plants were approximately 106 ㎝ in height and averaged 19 branches, and thus were suitable for street trees. The flowers of ‘Dasom’ were semi-double type with medium red color and red eye spots. Petal length and width were about 4.0 ㎝ and 3.3 ㎝, respectively. Flower diameter was slightly small, at about 5.8 ㎝, because of highly overlapping petals. The flowering period of ‘Dasom’ was about 105 days, which was 6 days shorter than that of the original variety, ‘Hongsun’. However, the main charactersistics of ‘Dasom’ including leaf shape were similar to those of the original variety, ‘Hongsun’.
국화 화색 돌연변이 품종 ‘ARTI-purple’ 및 ‘ARTI-queen’ 꽃잎 조직의 재분화와 신초형성에 미치는 식물생장호르몬의 영향
이유미(Yu-Mi Lee),강은정(Eun Jeong Kang),성상엽(Sang Yeop Sung),김상훈(Sang Hoon Kim),하보근(Bo-Keun Ha),김동섭(Dong Sub Kim),김진백(Jin-Baek Kim),강시용(Si-Yong Kang) 한국원예학회 2013 원예과학기술지 Vol.31 No.3
국화는 전 세계적으로 가장 대중적인 화훼류 중의 하나로써, 최근 새로운 국화 품종들이 돌연변이육종을 통해 개발되고 있다. 그러나 현재까지 하나의 국화 원품종에서 유래한 돌연변이 품종들 간의 조직배양 조건 차이에 대한 보고는 전무하다. 따라서 본 연구에서는 2개의 국화 화색 돌연변이 품종 ‘ARTI-purple’과 ‘ARTI-queen’의 효율적인 재분화 조건을 비교하기 위해 수행되었다. 실험재료로 꽃봉오리 시기와 통상화 개화 이전 시기의 꽃잎을 이용하였고, 꽃의 조직에 따른 차이를 확인하기 위해 통상화 및 설상화를 구분하여 실험을 수행하였다. 국화 재분화를 위한 식물생장호르몬의 적정 조합을 찾기 위해 3% sucrose, 0.3% gelrite를 포함한 MS 배지에 BA, NAA, IAA 중 2가지 호르몬을 조합별로 첨가하여 실험을 수행하였다. 절편체는 일장 16시간, 온도 25 ± 1°C 조건으로 배양하였으며, 재분화율 조사는 배양 후 4주 및 8주차에 실시하였다. 결과적으로, 가장 높은 재분화율은 두 품종 모두 최적 NAA와 BA의 호르몬 조합에서 꽃봉오리 시기의 통상화를 사용할 시 가장 높게 확인되었다. 재분화를 위한 식물생장호르몬의 최적 조합은 ‘ARTI-purple’의 경우 NAA 1.0mg·L<SUP>-1</SUP>와 BA 0.5mg·L<SUP>-1</SUP>로 47.9%의 재분화 효율을 보였으며, ‘ARTI-queen’의 경우 NAA 2.0mg·L<SUP>-1</SUP>와 BA 1.0mg·L<SUP>-1</SUP>로 25.6%의 재분화 효율을 나타내었다. 재분화된 지상부는 1/2 MS배지에서 발근시켰으며, 기내 소식물체는 유리온실에서 성공적으로 순화되었다. 본 연구결과는 감마선을 사용한 돌연변이육종법에 의해 개발된 다양한 국화품종의 효율적인 재분화 시스템을 구축하는데 유용한 정보를 제공할 것이다. Chrysanthemum is one of the most popular ornamental plants worldwide. Recently, lots of new and novel chrysanthemum varieties have been developed using mutagenesis. However, there was no study for comparison of tissue culture condition among the mutant varieties derived from one original variety, until now. This study was conducted to compare the efficient regeneration condition of the two chrysanthemum mutant varieties, ‘ARTI-purple’ and ‘ARTI-queen’. Two different flower parts (disk and ray florets) at the unopened and early blooming stages were used for comparison of regeneration condition on MS medium supplemented with combinations of three growth regulators (BA, NAA, and IAA). The highest regeneration rate was identified on the NAA and BA combination when the disk florets at unopened blooming stage are used. The best optimum combinations of growth regulators were identified as NAA 1.0 mg·L<SUP>-1</SUP> and BA 0.5 mg·L<SUP>-1</SUP> at ‘ARTI-purple’, which displayed 47.9% regeneration. However, regeneration of ‘ARTI-queen’ was the highest as 25.6% at NAA 2.0 mg·L<SUP>-1</SUP> and BA 1.0 mg·L<SUP>-1</SUP>. There results indicate that there is a difference for the optimum regeneration condition between the mutant varieties derived from one original variety. These results will be useful for construction of efficient regeneration system of diverse chrysanthemum mutants developed by mutation breeding.
김지민(Ji-Min Kim),신일섭(Ilseob Shin),박수권(Soo-Kwon Park),최만수(Man Soo Choi),이정동(Jeong-Dong Lee),하보근(Bo-Keun Ha),이주석(Juseok Lee),강양제(Yang Jae Kang),정순천(Soon-Chun Jeong),문중경(Jung-Kyung Moon),강성택(Sungteag Kang 한국육종학회 2021 한국육종학회지 Vol.53 No.1
A yellow soybean cultivar called ‘Hipro’ was developed using the single seed descent (SSD) method by crossing ‘Saedanbaek’(SS92414 ×MD87L) and ‘Daepung’ (Baekwon × Sinpaldal2). A preliminary yield trial (PYT), advanced yield trial (AYT), and regional yieldtrial (RYT) were conducted in three regions. ‘Hipro’ has a determinate growth habit, white flowers, and a spherical seed shape. In the regionalyield trial, the flowering and maturity dates of ‘Hipro’ were August 4 and October 17, respectively, and the 100-seed weight was 22.2 g,which was lower than that of Daewon (26 g). Additionally, ‘Hipro’ showed resistance to lodging, soybean mosaic virus (SMV), bacterialblight, and pod shattering. The seed protein content of ‘Hipro’, which was of particular interest in this study, was 53.9%, which was higherthan that of ‘Daepung’ (41.5%), and the total amino acid content without tryptophan was 43.6%, 19% higher than that of ‘Daepung’. Themean yield of ‘Hipro’ in RYT was 2.23 ton/ha, which was 91.3% of the yield of ‘Daewon’. However, ‘Hipro’ showed an 11% higher yieldthan Daewon in Paju. As a result of the tofu characteristic test, Hipro is suitable for making soy milk and tofu due to its high solid content(12.67 Brix) and protein content (13.68%) and high yield (325%) of tofu. Overall, ‘Hipro’ had high protein content, excellent processingquality for tofu and soy milk, and strong resistance to disease and pod shattering that will greatly contribute to the consumption of soybeansin Korea. (Registration No. 7735).