• Title/Summary/Keyword: Biology and Life Science

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Physiological Characteristics of Olive Flounder (Paralichthys olivaceus) and Korean Rockfish (Sebastes schlegelii) According to the Concentration of Suspended Load (부유사 농도에 따른 넙치와 조피볼락의 생리학적 특성)

  • Ha-Jeong Son;Kwang-Min Choi;Gyoungsik Kang;Won-Sik Woo;Kyung-Ho Kim;Min Yong Sohn;Min-Soo Joo;Chan-Il Park
    • Korean Journal of Ichthyology
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    • v.34 no.4
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    • pp.253-261
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    • 2022
  • After exposing Olive flounder and Korean rockfish to the concentration ranges of control (0 mg/L), 100 mg/L, 250 mg/L, 500 mg/L, and 1,000 mg/L, to investigate the physiological properties of suspended load on fish AST/GOT, ALT/GPT, ALP and cortisol were analyzed. As a result of the analysis, the AST/GOT, ALT/GPT, ALP and cortisol values were higher in the suspended load concentration section than in the control group. After artificial infection with S. parauberis for Olive flounder and V. harveyi for Korean rockfish exposed to suspended load, the survival rate was higher in the control group than in the suspended load concentration section. These results are related to the previously study results of suspended load that adversely affect fish, suggesting that suspended load affects the health of fish.

Structure and action mechanism of humic substances for plant stimulations

  • Jeon, Jong-Rok;Yoon, Ho Young;Shin, Gyeong-Im;Jeong, Song Yi;Cha, Joon-Yung;Kim, Woe-Yeon
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.38 no.3
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    • pp.175-179
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    • 2018
  • Humic substances that can be obtained from coal resources such as leonardite in a bulk scale have been employed as crop stimulators and soil conditioners. The polymeric organics containing a variety of aromatic and aliphatic structures are known to activate plants in a multifunctional way, thus resulting in enhanced germination rate and abiotic stress resistance concomitant with induction of numerous genes and proteins. Although detailed structural-functional relationship of humic substances for plant stimulations has not been deciphered yet, cutting-edge analytical tools have unraveled critical features of humic architectures that could be linked to the action mechanisms of their plant stimulations. In this review article, we introduce key findings of humic structures and related biological functions that boost plant growth and abiotic stress resistance. Oxygen-based functional groups and plant hormone-like structures combined with labile and recalcitrant carbon backbones are believed to be critical moieties to induce plant stimulations. Some proteins such as HIGH-AFFINITY $K^+$ TRANSPORTER 1, phospholipase A2 and $H^+$-ATPase have been also recognized as key players that could be critically involved in humic substance-driven changes in plant physiology.

Future Opportunities for life Science Programs in Space

  • Hiroki Yokota;Sun, Hui-Bin;George M. Malacinski
    • Animal cells and systems
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    • v.4 no.3
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    • pp.239-243
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    • 2000
  • Most space-related life science programs are expensive and time-consuming, requiring international cooperation and resources with trans-disciplinary expertise. A comprehensive future program in "life sciences in space" needs, therefore, well-defined research goals and strategies as well as a sound ground-based program. The first half of this review will describe four key aspects such as the environment in space, previous accomplishments in space (primarily focusing on amphibian embryogenesis), available resources, and recent advances in bioinformatics and biotechnology, whose clear understanding is imperative for defining future directions. The second half of this review will focus on a broad range of interdisciplinary research opportunities currently supported by the National Aeronautics and Space Administration (NASA), National Institute of Health (NIH), and National Science Foundation (NSF). By listing numerous research topics such as alterations in a diffusion-limited metabolic process, bone loss and skeletal) muscle weakness of astronauts, behavioral and cognitive ability in space, life in extreme environment, etc., we will attempt to suggest future opportunities.

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