• Proceedings of the Korean Society of Crop Science Conference
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• 2023.04a
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• pp.37-37
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• 2023

• Journal of Ecology and Environment
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• v.30 no.4
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• pp.307-314
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• 2007

We studied changes in the biochemical and physiological status and ROS-scavenging enzyme (superoxide dismutase, catalase and peroxidase) activity in leaves and roots of rice (Oryza sativa L.) plants exposed to high salinity. Under salt stress, the reduction in RWC (relative water content) in leaves was relatively severe in comparison with that of roots. The proline content was also significantly higher in leaves of rice plants following salt treatment. The activities of CAT and POX in roots increased with increasing NaCl concentration, but the activity of SOD decreased. These results suggest that the increase of endogenous proline is closely associated with the increase of CAT and POX activities, which may play important roles in salt tolerance. Therefore, we conclude that the alleviation of oxidative damage and increased resistance to salinity may result from the presence of efficient antioxidative systems.

• Development and Reproduction
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• v.17 no.3
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• pp.149-177
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• 2013

Living beings are surrounded by various changes exhibiting periodical rhythms in environment. The environmental changes are imprinted in organisms in various pattern. The phenomena are believed to match the external signal with organisms in order to increase their survival rate. The signals are categorized into circadian, seasonal, and annual cycles. Among the cycles, the circadian rhythm is regarded as the most important factor because its periodicity is in harmony with the levels of melatonin secreted from pineal gland. Melatonin is produced by the absence of light and its presence displays darkness. Melatonin plays various roles in creatures. Therefore, this review is to introduce the diverse potential ability of melatonin in manifold aspects in living organism.

• Journal of the Korean Society of Costume
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• v.61 no.1
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• pp.124-131
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• 2011

Modernity is commonly defined as a reflection of the features of modern society based on the historical experience of the West. As such, modernity includes involvement with political, economic, and social changes, a changing world-view, and changing trends in equality, gender roles, a desire for "the new," consumption, distribution based on mass production, and rational reform in fashion and dress. First and foremost, however, modernity in costume has been driven by the functional requirements of industrial capitalism. But while modernity has popularly been regarded as some sort of universal standard, in fact the West and the other societies have vastly different, unique, and particular experiences with their own respective histories of modernization. For this reason, cultural changes in the modernization process should be-indeed, must be-analyzed in the context of a country's own unique historical and cultural circumstances, rather than through the prism or strict adaptation of generalized Western concepts of modernization. Moreover, a "periodization" of the modernization of fashion and dress can be established by examining the characteristics of modernity in costume.

• Journal of National Security and Military Science
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• s.4
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• pp.1-44
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• 2006

Today, the times of knowledge-intelligence made changes of the ordinary life of citizens society, and also changed greatly the circumstance of leadership in the military. The times of knowledge-intelligence changed the circumstances of national security and the features of warfares, and also make affecting decisively to senses and style of new who were servicing in the military. In order to response effectively against the changes of those leadership circumstances, senior level leadership should be understand in depth human psychology and battlefield circumstances in the dimension of policies and strategies, and should be executed their leadership. In this thesis, I reviewed the concept and vision of senior level leadership theories and cases about traits and roles In addition, I suggested development options for senior level leadership such as (1) high charactenstics and professionalism, (2)educational center of military for advanced democratic citizen and leadership, (3)execution of leadership in psychological leadership, (4)development of leadership needed in the battlefield Finally, the current military senior level leadership should be changed from one-side and authority style to the change-orientated style, which could believe and participate by themselves.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.13 no.1
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• pp.167-182
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• 2002

Rapidly changing information technologies and changes in new information type provide a new turning point in librarian's role and job as an information specialist. A library traditionally processes and manages paper-type information resources. But, with new requirements to library and changes of information sources, a digital library for use, management, and delivery of information came into existence. The appearance of digital library provides new direction for information processing and requires various changes in roles of information specialists for appropriately and quickly providing information and knowledge for users. The developments of information technology related to information and knowledge and environmental changes around library provide information specialist, who have a role in information processing and delivery, with new challenging areas. On the other hand, the traditional library areas can be infringed upon by those factors. With such rapid changes, an information specialist with a major in library and information science makes various efforts to keep their status as an information specialist and performs their role in information siciety. Currently, they partially lead an active role in the areas relating information and knowledge. This paper focuses on information specialist' current status and role in not library areas but new areas related to information technologies, and figures out requirements to take firm position in those areas.

• Journal of The Korean Digital Architecture Interior Association
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• v.11 no.4
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• pp.47-56
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• 2011

In recent years, the change of urban function and the decrease in birth rate have given rise to merge, abolition and relocation of the existing building in cities. This study explores the possibilities for various land utilizations of relocated urban sites. In doing so, it compares the development methods and the utilization pattern between home and abroad. It analyses the land use categories and the development methodologies of 4 relocated urban sites happened in Seoul and 4 foreign sites. In addition, it analyzes the land utilization after relocation, development principals, area, building usage and changes in land use regulation. Finally, it proposes the directions for developing relocated site and each of roles among the parties concerned. This study concludes that it is available to exploit the relocated urban sites by the variety of development methodologies, especially in a metropolis like Seoul.

• Korean Journal of Microbiology
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• v.19 no.1
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• pp.8-13
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• 1981

The content of sulfhydryl compounds in Chlorella cells during the life cycle in the synchronous culture is determined spectrophotomatically at 250nm(pH7.0) using p-CMB as SH-reagent. The changes in the content of-SHl compounds and protein in Chlorella cells is measured during the life cycle in connection with cell division and analyzed. 1) The amounts of total ninhydrin reactive substance increased with growth of cells but increased the more at the $L_4$ stage(cytokinesis stage) than at the $L_2$ stage (nuclear division stage). 2) The sulfhydryl content of Chlorella cells increased strikingly at the $L_2$ stage and decreased markedly at the $L_4$ stage. 3) The amounts of values -SH/protein showed a peak at the $L_2$ stage. The increase of the amount of total-SH compounds of cells during the nuclear division period was considered to be caused by the weighty roles of protein-SH groups for the formation of nuclear division apparatus and for the enzyme activity.

• Molecules and Cells
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• v.45 no.1
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• pp.16-25
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• 2022

Mechanical forces play pivotal roles in regulating cell shape, function, and fate. Key players that govern the mechanobiological interplay are the mechanosensitive proteins found on cell membranes and in cytoskeleton. Their unique nanomechanics can be interrogated using single-molecule tweezers, which can apply controlled forces to the proteins and simultaneously measure the ensuing structural changes. Breakthroughs in high-resolution tweezers have enabled the routine monitoring of nanometer-scale, millisecond dynamics as a function of force. Undoubtedly, the advancement of structural biology will be further fueled by integrating static atomic-resolution structures and their dynamic changes and interactions observed with the force application techniques. In this minireview, we will introduce the general principles of single-molecule tweezers and their recent applications to the studies of force-bearing proteins, including the synaptic proteins that need to be categorized as mechanosensitive in a broad sense. We anticipate that the impact of nano-precision approaches in mechanobiology research will continue to grow in the future.

• Biomolecules & Therapeutics
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• v.6 no.1
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• pp.25-30
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• 1998

The roles of dopamine(DA) and N-methyl-D-aspartate(NMDA) system in the development and expression of morphine dependence were investigated by monitoring the concentrations of extracellular DA and its metabolites by in vivo microdialysis and simultaneous observation of behavioral changes in morphine dependent rats. Extracellular DA level in caudate putamen of morphine-dependent rat was decreased and the concentrations of its metabolites, dihydroxy phenylacetic acid(DOPAC) and homovanillic acid(HVA), were increased during naloxone-precipitated withdrawal. DA contents were recovered to normal levels by pretreatment of MK-801, a noncompetitive NMDA receptor antagonist, which may explain the mechanism of diminishing effect of MK-801 on withdrawal symptoms in morphine-dependent rats. MK-801(0.3 mg/tg, i.p.) induced the untoward hamful neurological signs such as ataxia and severe rotations, which may be produced by hyperactivation of dopaminergic system. These results suggest that MK-801 may inhibit the expression of mophine dependence by altering the dopamine release.