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신선영,윤호성,김명희,김율호,박향미 한국분자세포생물학회 2013 Molecules and cells Vol.36 No.4
Plants are exposed to various environmental stresses and have therefore developed antioxidant enzymes and molecules to protect their cellular components against toxicity derived from reactive oxygen species (ROS). Ascorbate is a very important antioxidant molecule in plants, and monodehydroascorbate reductase (MDHAR; EC 1.6.5.4) and dehydroascorbate reductase (DHAR; EC 1.8.5.1) are essential to regeneration of ascorbate for maintenance of ROS scavenging ability. The MDHAR and DHAR genes from Brassica rapa were cloned, transgenic plants overexpressing either BrMDHAR and BrDHAR were established, and then, each transgenic plant was hybridized to examine the effects of co-expression of both genes conferring tolerance to freezing. Transgenic plants co-overexpressing BrMDHAR and BrDHAR showed activated expression of relative antioxidant enzymes, and enhanced levels of glutathione and phenolics under freezing condition. Then, these alteration caused by co-expression led to alleviated redox status and lipid peroxidation and consequently conferred improved tolerance against severe freezing stress compared to transgenic plants overexpressing single gene. The results of this study suggested that although each expression of BrMDHAR or BrDHAR was available to according tolerance to freezing, the simultaneous expression of two genes generated synergistic effects conferring improved tolerance more effectively even severe freezing.
무기체계 소프트웨어 감항인증을 위한 결합도 입증 방안 연구
신선영 한국정보과학회 2023 정보과학회논문지 Vol.50 No.11
In 2009, To secure flight safety of military aircraft and enhance the competitiveness of our aircraft exports by applying internationally recognized airworthiness certification standards, South Korea established the "Act on Certification of Flight Safety for Military Aircraft" along with its enforcement decree and regulations. According to these regulations, domestically developed military aircraft are required to be certified following the airworthiness certification laws, procedures, and standards. The standard airworthiness certification criteria for military aircraft, which serve as the basis for airworthiness assessment, was developed by the Defense Acquisition Program Administration (DAPA) and has been revised up to the 7th edition. Among the recent changes, the most impactful area is Chapter 15, which pertains to computer resources in software. As the proportion of software development within weapon systems continues to increase, the related standards are becoming more detailed and refined to keep up with the evolving. This study aimed to clarify and propose verification methods for newly incorporated software coupling criteria in the revised airworthiness certification standards.