• Title/Summary/Keyword: Biological Engineering

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Unrecorded species of Korean invertebrates discovered through the project of 'Discovery of Korean Indigenous Species' II

  • Su-Jung Ji;Chuleui Jung;Hyun Woo Bang;Min Ok Song;Jongwoo Jung;Seong Myeong Yoon;Seunghwan Lee;Seoyoung Keum;Hee-Min Yang;Dongmin Lee;Geon Hyeok Lee;Jaeseok Oh;Kichoon Kim;Hansol Park;Heejin Moon;Omid Joharchi;Yeseul Kang;Keeseon S. Eom;Kyung Jin Lee;Ye Eun;Taeho Kim;Ivana Karanovic;Jeounghee Lee;Seongjun Choe;Gi-Sik Min
    • Journal of Species Research
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    • v.12 no.1
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    • pp.68-89
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    • 2023
  • This is the second catalog listing unrecorded invertebrates discovered during the research project 'Discovery of Korean Indigenous Species'. The data to compile the catalog were primarily gathered from the final reports of the project, between 2013 and 2021. We present 38 previously undocumented species, belonging to four phyla (Platyhelminthes, Annelida, Rotifera and Arthropoda). Samples were collected from intertidal coastal waters, soil, freshwater ponds, reservoirs and hosts in South Korea. In this study, we provide brief taxonomic information, including collection site (GPS), diagnosis, specimen vouchers, figures of representative individuals and the Korean name newly assigned, for each species. All data were reviewed and updated by experts working on the respective taxonomic group. The aim of the present study is to publish species that have been previously reported through the project. Upon publication, these species will be added to the 'National Species List of Korea', curated by the National Institute of Biological Resources(NIBR).

Acetylation of s-Triazine Derivatives from Uronic Acids and their Biological Activity (오탄당(五炭糖) Triazine 유도체(誘導體)의 Acetylation 과 생리활성(生理活性)에 관(關)하여)

  • Lee, Chun-Soo
    • Applied Biological Chemistry
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    • v.21 no.2
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    • pp.119-122
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    • 1978
  • Acetylation of triazinylated monosaccharides was carried out. The products were identified by elementary analysis. IR and NMR with Methyl $[T]-{\beta}-L-acetyl-arabopyranoside$ and Methyl $[T]-\alpha-D-acetyl-lyxopyranoside$ respectively. The triazine derivatives of uronic acids had no remarkable biological activities against dish and rice, and also showed not to be effected on antifungal and antibacterial activities.

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The Practical Application of Aqueous Two-Phase Processes for the Recovery of Biological Products

  • Rito-Palomares, Marco
    • Journal of Microbiology and Biotechnology
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    • v.12 no.4
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    • pp.535-543
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    • 2002
  • Although the generic implementation of aqueous two-phase systems (ATPS) processes for the recovery of biological products has been exploited for several years, this has not resulted in a wide adoption of the technique. The main reasons involve the poor understanding of the mechanism governing phase formation and the behavior of solute partitioning in ATPS processes, the cost of phase forming polymers, and the necessary extended time to optimize the technique. In this review paper, some of the practical disadvantages attributed to ATPS are addressed. The practical approach exploited to design ATPS processes, the application to achieve process integration, the extended use for the recovery of high-value products, and the recent development of new low-cost ATPS, are discussed. It is proposed that the trend of the practical application of ATPS processes for the recovery of biological products will involve the purification of new high-value bioparticulate products with medical applications. Such a trend will give new impetus to the technique, and will draw attention from industries needing to develop new, and improve existing, commercial processes.

Biological smart sensing strategies in weakly electric fish

  • Nelson, Mark E.
    • Smart Structures and Systems
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    • v.8 no.1
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    • pp.107-117
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    • 2011
  • Biological sensory systems continuously monitor and analyze changes in real-world environments that are relevant to an animal's specific behavioral needs and goals. Understanding the sensory mechanisms and information processing principles that biological systems utilize for efficient sensory data acquisition may provide useful guidance for the design of smart-sensing systems in engineering applications. Weakly electric fish, which use self-generated electrical energy to actively sense their environment, provide an excellent model system for studying biological principles of sensory data acquisition. The electrosensory system enables these fish to hunt and navigate at night without the use of visual cues. To achieve reliable, real-time task performance, the electrosensory system implements a number of smart sensing strategies, including efficient stimulus encoding, multi-scale virtual sensor arrays, task-dependent filtering and online subtraction of sensory expectation.

Removal Characteristics of Cyclic Ethers in Biological Wastewater Treatment System (고리형 에테르의 생물학적 처리 특성)

  • Lee, Sung-Ryul;Jeong, Yeon-Koo
    • Journal of Environmental Science International
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    • v.17 no.3
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    • pp.343-350
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    • 2008
  • The fate of two cyclic ethers, THF(Tetrahydrofuran) and 1,4-Dioxane, in conventional biological wastewater treatment plants was investigated using sequential activated sludge process. Removal efficiency of THF were about 86% in average, which was greater than that of 1,4-Dioxane, 30%. However, it was not clear whether the removal of cyclic ethers in biological system was caused by microbial activity or not. Thus treatability tests were conducted by batch experiments. The effects of mixing, aeration and the addition of activated sludge on the removal of cyclic ethers were investigated in batch experiments. THF was totally removed by mixing and aeration in 24 hours while removal ratio of 1,4-Dioxane was at most 30% for the same period. This results could be ascribed to the differences in Henry's law constants between the two chemicals. In addition, biological degradation including biosorption was not obviously observed in these batch tests.