• Title/Summary/Keyword: 해양 유전

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Evaluation of the Antioxidant Efficacy of Padina boryana Extract from Maldivian Seaweed from Laccadive Sea Area (라카디브 해역 몰디브 자생 해조류 Padina boryana 추출물의 항산화 효능 평가)

  • Kim, Hyun-Soo;Wang, Lei;Jayawardena, Thilina U.;Lee, Jeong Min;Yim, Mi-Jin;Ko, Seok-Chun;Lee, Hyo-Geun;Je, Jun-Geon;Jeon, You-Jin;Lee, Dae-Sung
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.2
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    • pp.162-169
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    • 2021
  • Global warming has affected the distribution of organisms for decades and has displayed rapid ascent recently. Research into the effects on tropical organisms are vital. Padina boryana is a resourceful marine microalgae in the Maldives Sea in the Laccadive region. A 70% ethanol extraction (PBE) of this seaweed was used to investigate its antioxidant potential. Both in vitro and in vivo models were implemented. PBE exhibited protective potential against H2O2 induced apoptosis. ROS levels were suppressed due to PBE. PBE expressed a cytoprotective nature. In vivo experiments involving the zebra fish model conformed its validity. The antioxidant efficacy of PBE was dose dependent. Study outcomes suggest PBE has potential as a novel and valuable marine resource to aid the functional food and cosmeceutical industries.

Genetic Similarity-dissimilarity Among Korea Chum Salmons of Each Stream and Their Relationship with Japan salmons (한국 연어의 소상하천간 유전적 유사성과 차이점 및 일본 연어와 유전적 관계)

  • Kim, Go-Eun;Kim, Choong-Gon;Lee, Youn-Ho
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.12 no.2
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    • pp.94-101
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    • 2007
  • Analysis of population structure of Oncorhynchus keta, the most abundant salmon in the East Sea of Korea, has not been much carried out despite its importance as a fishery resource in the North Pacific. Currently, molecular methods are being applied to stock identification and a method of using single nucleotide polymorphisms (SNPs) is getting more popular. In this study, we analyzed the 720 bp long sequence of the mtDNA COIII-ND3-ND4L region in order to examine genetic similarity-dissimilarity among the Korea chum salmons of each stream and their relationship with the Japan chum salmons. A total of 152 individuals were analyzed, 108 from 3 locations of Korea and 44 from 2 locations of japan, which resulted in as many as 29 different haplotypes. Pairwise $F_{ST}$ and AMOVA tests of the populations show that there is no significant population-level genetic difference among the chum salmons analyzed ($F_{ST}<0.07$). On the other hand, haplotype relationships among the individuals reveal that approximately 25% of the Korea salmons consist genetic lineages independent of Japan salmons and also that a genetic lineage exists in the Puk river and the Namdae river salmons independent of the Wangpi river salmons of Korea.

Morphology of a Larval Atlantic Footballfish Himantolophus groenlandicus Reinhardt, 1837 (Lophiiformes: Himantolophidae) Identified by Complete Mitochondrial DNA (미토콘드리아 전장 유전체로 동정한 아귀목 Himantolophus groenlandicus 자어의 형태적 특징)

  • Choi, Hae-young;Jang, Yo-soon;Kim, Sung
    • Korean Journal of Ichthyology
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    • v.34 no.1
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    • pp.1-7
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    • 2022
  • A larva of the deep-sea angler fish, Himantolophus groenlandicus (2.2 mm BL), identified based on the complete mitochondrial DNA sequence, was collected at the surface of the western North Pacific. The postflexion stage larva had a round body, small teeth, incipient dorsal fin rays, eyes slightly recessed in the lower part, and melanophores on the gills and parietal and dorsal regions. These morphological features differ from a description of a larva reported as the same species with similar size (2.1 mm BL). The genetic and morphological information of our specimen should be useful for identifying larval H. groenlandicus.

Complete genome sequence of Tamlana sp. UJ94 degrading alginate (알긴산을 분해하는 세균 Tamlana sp. UJ94의 완전한 유전체 서열)

  • Jung, Jaejoon;Bae, Seung Seob;Chung, Dawoon;Baek, Kyunghwa
    • Korean Journal of Microbiology
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    • v.54 no.4
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    • pp.463-464
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    • 2018
  • Tamlana sp. UJ94 isolated from seawater can degrade alginate. To identify the genomic basis of this activity, the genome was sequenced. The genome was composed of 4,116,543 bp, 3,609 coding sequences, and 35.2 mol% G + C content. A BLASTp search predicted the presence of 9 alginate lyases as well as 6 agarases, 5 amylases, 4 carrageenases, 1 cellulase, 4 pectate lyases, and 7 xylanases, indicating its ability to degrade diverse polysaccharides. The genome of strain UJ94 is a source of polysaccharide-degrading enzymes for bioconversion processes.

Estimation of the Initial Production Cost for Offshore Structures (해양구조물의 초기생산단가 산정 알고리즘 개발)

  • Son, Se-Hwan;Nam, Jong-Ho;Lee, Jong-Hak;Kim, Won-Do
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2011.04a
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    • pp.191-194
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    • 2011
  • 전 세계적으로 에너지원 확보에 많은 관심을 가지고 있다. 육상유전에서 석유가 고갈되고 있는 시점에서 해양유전개발이 활발하게 이루어지고 있고 해양구조물 발주도 활발히 이루어지고 있다. 하지만 해양구조물은 아주 다양한 장비 물품과 복잡한 기하학적 구조를 가지고 있어 설계, 생산, 설치 운용에 어려움을 겪고 있고 기본설계, 장비 등과 같은 핵심기술은 외국에 의존하고 있는 실정이다. 이러한 상황을 극복하기 위해서는 해양플랜트 산업분야의 설계 및 생산기술력이 요구되고 있다. 본 연구에서는 해양구조물의 설계와 생산 작업에 중요한 인자로 적용되는 초기생산 단가산정 알고리즘을 이용한 Tool을 제시하고자 한다. 초기원가산정 알고리즘을 개발함으로써 생산 공정의 난이도를 미리 예측하여 준비 및 대비 할 수 있도록 하여 생산 공정의 발전을 이끌 수 있고 초기 설계 단계에서 사전 평가에 중요한 지표로 활용하며 설계 작업에 가이드라인을 제시하여 좀 더 경제적이고 효과적인 설계를 가능하게 해줄 것이다.

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Chromosomal Assembly of Tegillarca granosa Genome using Third-generation DNA Sequencing and Hi-C Technology (3세대 DNA 염기서열 분석과 Hi-C기술을 이용한 꼬막 게놈의 유전체 연구)

  • Kim, Jinmu;Lee, Seung Jae;Jo, Euna;Choi, Eunkyung;Cho, Minjoo;Shin, So Ryung;Lee, Jung Sick;Park, Hyun
    • Journal of Marine Life Science
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    • v.6 no.2
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    • pp.97-105
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    • 2021
  • Tegillarca granosa, is one of the most important fishery resources throughout Asia. However, due to industrialization factories, marine environmental pollution, and global warming, the marine fishery production has drop sharply. In order to understand the genetic factors of the blood clam, which is a major fishery resource on the southern coast of Korea, the whole genome of blood clam was studied. The assembled genome of T. granosa was 915.4 Mb, and 19 chromosomes were identified. 25,134 genes were identified, and 22,745 genes were functionally annotated. As a result of performing gene gain and loss analysis between the blood clam genome and eight other types of shellfish, it was confirmed that 725 gene groups were expanded, and 479 gene groups were contracted. The homeobox gene cluster of blood clam showed a well-preserved genetic structure within lophotrochozoan ancestor. T. granosa genome showed high similarity between three hemoglobin genes with Scarpharca broughtonii. The blood clam genome will provide information for the genetic and physiological characteristics of blood clam adaptation, evolution, and the development of aquaculture industry.