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장석우(Suk Woo Jang), 최승국(Seung Kook Choi), 박수형(Suhyoung Park), 최학순(Hak Sun Choi), 양은영(Eung Young Yang), 이종남(Jong Nam Lee), 김대균(Dae Gyun Kim), 노재관(Jae Kwan Noh), 김은지(Eun Ji Kim), 정완규(Wan Gyu Jeong), 고순보(Sun Bo Ko) 한국육종학회 2018 한국육종학회지 Vol.50 No.3
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.
A new red butterhead lettuce (Lactuca sativa L.) with transverse broad elliptic, red leaves, ‘Sun Red Butter', with late bolting and high yield, was developed from a cross between ‘Jajusangchu' (red leaf color and half crisp) and ‘Dukseomjeokchukmyeon' (high yield). The crossing and selection for advanced lines was previously carried out using the pedigree method during the period 2001-2009. The advanced lines were evaluated for yield and adaptability at several locations in Korea (Gangwon-do, Gyeonggi-do, Chungcheongbuk-do, Jeollabuk-do, Gyeongsangnam-do, and Jeju-do) in 2011. The type of matured stage is early and medium butterhead lettuce. The shelf life of ‘Sun Red Butter' was four weeks longer than that of ‘Germania' at 4°C. The anthocyanin content of ‘Sun Red Butter' was lower than that of ‘Germania' at 11.2 mg/100 g. The BSL (latucin+8-deoxylactucin+lactucopicrin) content of ‘Sun Red Butter' was higher than that of ‘Germania' at 32.8 μg/g, DW. The marketable yield of ‘Sun Red Butter' was higher than that of ‘Germania' by 67% (at 621.4 g per plant), and ‘Sun Red Butter' showed a particularly improved yield under high-temperature cultivation in the field. Furthermore, ‘Sun Red Butter' had better taste characteristics and was crisper and sweeter than ‘Germania'. Therefore, we recommend that the new cultivar ‘Sun Red Butter' would be suitable for cultivation in spring and fall. Furthermore, this new cultivar could be harvested in a single harvest, as in a head lettuce, and could therefore be managed more efficiently and economically by farmers.
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.
The purpose of this study is to check the Korean government s response to COVID-19 in 2020 through an information process, identify problems, and suggest solutions. This study examined the Korean government s initial response to COVID-19 and the ongoing crisis management process through a 5-step information process. The five-step information process looks at (1) the process of gathering information about COVID-19. (2) Look through the process of analyzing the collected information. (3) The status of information sharing among the responding organizations was checked, and (4) Infectious disease information was investigated how transparent, accurate, and timely information was disclosed. (5) The government continuously updated information and looked for management measures. As a result, in the event of an overseas infectious disease, the government strives to collect information more quickly, establish a professional manpower and analysis system, share information led by the government, establish a discreet and principled information disclosure system, and manage information through a system, continuous efforts for investment and research. 2020년 COVID-19에 대한 한국 정부의 대응 과정을 정보 프로세스를 통해 점검하고, 문제점을 식별하고, 이에 대한 해결책을 제시하는 것이 이 연구의 목적이다. 이 연구에서는 5단계 정보 프로세스를 통해 COVID-19에 대한 한국 정부의 초기 대응과 현재 진행 중인 위기 관리 프로세스를 점검하였다. 5단계 정보프로세스는 (1) COVID-19에 대한 정보를 수집하는 과정을 살피고. (2) 수집된 정보 분석과정을 통해 살피고. (3) 대응 조직간의 정보 공유 상황을 확인하고, (4) 감염병 정보가 얼마나 투명하고 정확하며 시기적절하게 공개되는지 조사하였다. (5) 정부가 지속적으로 정보를 최신화 및 관리조치를 살폈다. 결과적으로 정부는 해외 감염병 발생 시, 더 신속한 정보 수집 노력, 전문인력 및 분석체계 구축, 정부 주도의 적극적인 정보 공유 노력, 신중하고 원칙 있는 정보 공개 시스템 구축, 인력이 아닌 체계 구축을 통한 정보 관리를 위한 투자와 연구에 지속적인 노력이 필요할 것으로 보인다.
Objective: The purpose of this study is to investigate the heat treatment conditions to minimize the change of mechanical properties before and after the heat treatment of orthodontic stainless steel round wire with the length of 250 mm diameter of 0.9 mm. Methods: 250 mm long straight tensile test specimens and 30 mm straight bend test specimens were fabricated in stainless steel wire with a diameter of 0.9 mm to meet the respective test conditions. The specimens were annealed at 300°C, 500°C, 700°C and 900°C without heat treatment and mooring at 20°C per minute. specimens before and after heat treatment were subjected to a tensile test and a bend test using a universal testing machine. Results: Analysis of tensile properties proceeded on-way ANOVA. As a result of, there was a significant difference in yield load, yield strength, maximum load tensile strength. There was no significant difference in fracture displacement at 900°C. Analysis of the bending properties was carried out on-way ANOVA. As a result of, the maximum load was 300°C, 500°C and 900°C, and the tensile strengths were significantly different at 500°C and 700°C. There is no significant difference in maximum displacement. Conclusion: In the tensile test fracture displacement was higher when the heat treatment is performed at 300°C than that of the A company specific heat treatment, B, C for the company but the specific heat treatment was higher than 300°C from 500°C heating temperature goes up higher rupture displacement.
The Fe-Si-B-Nb-Cu alloys containing Ca and Al were rapidly solidified to thin ribbons by melt-spinning. The ribbons were ball-milled to make powders, and then mixed with 1 wt.% water glass and 1.5 wt.% lubricant. The mixed powders were burn-off, and then compacted to form toroidal-shaped cores, which were heat treated to crystallize the nano-grain structure and to remove residual stress of material. The characteristics of the powder cores were analyzed using a differential scanning calorimetry (DSC) and a B-H meter. The microstructures were observed using transmission electron microscope (TEM). The optimized soft magnetic properties (μi and Pcv) of the powder cores were obtained from the Ca and Al containing alloys after annealing at 530 °C for 1 h. The core loss of Fe-Si-B-Nb-Cu-based powder cores was reduced by the addition of Ca element, and the initial permeability increased due to the addition of Al element.