• 제목/요약/키워드: Marine Technology

검색결과 9,646건 처리시간 0.033초

The First Record of Long Headed Eagle Ray, Aetobatus flagellum (Pisces: Myliobatidae) from Korea

  • Oh, Ji-Na;Kim, Sung;Kim, Choong-Gon;Soh, Ho-Young;Jeong, Da-Wa;Lee, Youn-Ho
    • Ocean Science Journal
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    • 제41권1호
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    • pp.53-57
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    • 2006
  • A specimen of Aetobatus flagellum was collected at Uljin in June 2005 for the first time in Korea. This specimen is characterized by the cephalic fin, the long snout, the dorsal fin between pelvic fins, spiracles on the dorsal side of the disc, the deeply notched nasal curtain and the one row of the teeth in the lower and the upper jaws. And unlike Aetobatus narinari, it does not have any spots on the its dorsal side of the disc. We report this specimen as the first record from Korea and name it 'Bak-jui-ga-o-ri' in Korean.

Effect of Liquid Circulation Velocity and Cell Density on the Growth of Parietochloris incisa in Flat Plate Photobioreactors

  • Changhai Wang;Yingying Sun;Ronglian Xing;Liqin Sun
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제10권2호
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    • pp.103-108
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    • 2005
  • For more accurately describing the durations of the light and the dark phases of micro-algal cells over the whole light-dark cycle, and probing into the relationship between the liquid circulation time or velocity, the aeration rate and cell density, a series of experiments was carried out in 10 cm light-path flat plate photobioreactors. The results indicated that the liquid flow in the flat plate photobioreactor could be described by liquid dynamic equations, and a high biomass output, higher content and productivity of arachidonic acid, $70.10\;gm^{-2}d^{-1},\;9.62\%$ and 510.3 mg/L, respectively, were obtained under the optimal culture conditions.

해양화학생물산업의 현황과 전망 (Present Status and Prospects of Marine Chemical Bioindustries)

  • 이선복;조선자;이신엽;백광현;김정아;장진화
    • KSBB Journal
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    • 제24권6호
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    • pp.495-507
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    • 2009
  • 21세기에 들어서면서 해양에 대한 인식은 해양선진국들을 중심으로 하루가 다르게 변모하고 있으며, 석유 및 육상자원의 고갈의 가속화로 인하여 해양의 중요성은 점차 커져 가고 있다. 지속가능한 발전을 위해서는 해조류, 해수 등과 같은 해양자원으로부터 산업용 화학품, 신소재, 연료, 희귀금속 등의 생산을 가능하게 하는 해양화학생물산업의 개발이 절실히 필요해지고 있다. 본 글에서는 해양화학생물산업분야 중 세계적으로 각광 받고 있으며 우리나라에서도 발전 가능성이 큰 분야인 해조다당류산업, 해양신소재산업, 해양바이오연료산업, 해양제염산업, 해양심층수산업 등 다섯분야를 선정하고 이들 분야의 현황과 전망을 소개하였다. 각 분야별 소개는 산업발전 역사, 기술개발 수준, 산업화 정도를 포함하고 있으며, 국내외 산업경향과 앞으로의 발전 가능성을 조사하였다. 분석결과, 해양화학생물산업기술의 발전을 위해서는 해양생물공정 개발에 대한 적극적인 연구개발 투자와 해양생물과학자들과 생물화학공학자들간의 협력 연구가 앞으로 더 많이 필요하기는 하지만 해양화학생물산업의 미래전망은 매우 밝은 것으로 나타났다.

Diversity and Antiaflatoxigenic Activities of Culturable Filamentous Fungi from Deep-Sea Sediments of the South Atlantic Ocean

  • Zhou, Ying;Gao, Xiujun;Shi, Cuijuan;Li, Mengying;Jia, Wenwen;Shao, Zongze;Yan, Peisheng
    • Mycobiology
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    • 제49권2호
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    • pp.151-160
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    • 2021
  • Despite recent studies, relatively few are known about the diversity of fungal communities in the deep Atlantic Ocean. In this study, we investigated the diversity of fungal communities in 15 different deep-sea sediments from the South Atlantic Ocean with a culture-dependent approach followed by phylogenetic analysis of ITS sequences. A total of 29 fungal strains were isolated from the 15 deep-sea sediments. These strains belong to four fungal genera, including Aspergillus, Cladosporium, Penicillium, and Alternaria. Penicillium, accounting for 44.8% of the total fungal isolates, was a dominant genus. The antiaflatoxigenic activity of these deep-sea fungal isolates was studied. Surprisingly, most of the strains showed moderate to strong antiaflatoxigenic activity. Four isolates, belonging to species of Penicillium polonicum, Penicillium chrysogenum, Aspergillus versicolor, and Cladosporium cladosporioides, could completely inhibit not only the mycelial growth of Aspergillus parasiticus mutant strain NFRI-95, but also the aflatoxin production. To our knowledge, this is the first report to investigate the antiaflatoxigenic activity of culturable deep-sea fungi. Our results provide new insights into the community composition of fungi in the deep South Atlantic Ocean. The high proportion of strains that displayed antiaflatoxigenic activity demonstrates that deep-sea fungi from the Atlantic Ocean are valuable resources for mining bioactive compounds.

Therapeutic effect of marine bioactive substances against periodontitis based on in vitro, in vivo, and clinical studies

  • Tae-Hee Kim;Se-Chang Kim;Won-Kyo Jung
    • Fisheries and Aquatic Sciences
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    • 제26권1호
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    • pp.1-23
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    • 2023
  • Marine bioactive substances (MBS), such as phlorotannins, collagens, peptides, sterols, and polysaccharides, are increasing attention as therapeutic agents for several diseases due to their pharmacological effects. Previous studies have demonstrated the biological activities of MBS including antibacterial, anticoagulant, antidiabetic, antimicrobial, anti-inflammatory activities. Among numerous human diseases, periodontitis is one of the high-prevalence inflammatory diseases in the world. To treat periodontitis, several surgeries (bone grafting, flap surgery, and soft tissue graft) are usually used. However, the surgery for patients with chronic periodontitis induces several side effects, including additional inflammatory responses at the operated site, chronic wound healing, and secondary surgery. Therefore, this review assessed the most recent trends in MBS using Google Scholar, PubMed, and Web of Science search engines to develop marine-derived therapeutic agents for periodontitis. Further, we summarized the current applications and therapeutic potential of MBS to serve as a reference for developing novel technologies applied to MBS against periodontitis treatment.