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본 논문에서는 하이퍼 미디어의 정의, 특성과 고려사항에 대하여 논하였고, 하이퍼 미디어 시스템이 갖추어야 할 모델을 제시하였다. 이 모델은 하이퍼 미디어의 계층구조, 필요한 하드웨어, 동기화 관계 링크, 네비게이션, 사용자 인터페이스와 멀티유저 환경에 대하여 제안하였다. In this paper, the definition, characteristics, consideration, etc, of hypermedia are discussed. And this paper proposes model which hypermedia system had to have. This model proposes hierarchy, hardware, synchronization relation, link, navigation, user interface and multiuser environment of hypermedia system.
Heat shock proteins (HSPs), one of the most highly conserved groups of proteins characterized to date, play crucial roles in protecting cells against environmental stresses, such as heat shock, salinity and oxidative stress. The glutathione S-transferases (GST) have important role in detoxification of oxidative stress, environmental chemicals and environmental stress. GST mRNA expression have been used as biomarkers on environmental stress. The purpose of this study was to investigate the death rate and the gene expression of Hsp70 and GST during air exposure and starvation. Results showed that, the expression of Hsp70 mRNA was significantly changed in the experiment groups, such as air exposure and starvation. GST mRNA expression was significantly increased in the experimental group of starvation. These results suggest that Hsp70 and GST were played roles in biomarker gene on the air exposure and starvation.
The Apostichopus japonicus is an important species in some Asia countries including Korea, China and Japan. The purpose of the present study was to investigate the differential gene expression of heat shock protein90 (Hsp90) and ferritin as a biomarker for the thermal stress during water temperature rising in the sea cucumber, A. japonicus. The A. japonicus (1.4 g) was cultured in incubator of separate temperature (15°C, 20°C, 25°C and 30°C) for each 0, 3, 6, 12, 24, 48 hours. The mRNA expression levels of Hsp90 and ferritin were examined using RT-PCR assay. Results showed that, the expression of Hsp90 mRNA was not significantly changed at 15°C. The expression of Hsp90 mRNA was significantly increased at high temperature such as 20°C and 25°C. Furthermore, Hsp90 mRNA was early increased at 25°C than 20°C. The ferritin mRNA was similar expression pattern with Hsp90. But, Hsp90 mRNA was more sensitive than ferritin mRNA at high thermal stress. These results indicate that Hsp90 and ferritin mRNAs were involved in the temperature changes response and may be play an important role in mediating the thermal stress in A. japonicas.