• Title/Summary/Keyword: Marine

Search Result 26,851, Processing Time 0.043 seconds

Monitoring of Some Chlorobenzenes in Marine Sediments and Bivalves from Several Coastal Regions of Korea

  • Moon Hyo-Bang;Lee Su-Jeong;Choi Hee-Gu
    • Fisheries and Aquatic Sciences
    • /
    • v.7 no.4
    • /
    • pp.215-218
    • /
    • 2004
  • Marine sediments and bivalves were sampled at 20 stations from coastal regions of Korea, to investigate the levels and patterns of some chlorobenzene isomers. Total chlorobenzenes were in the range of 0.32-3.55 ng/g dry weight in marine sediments and 0.26-0.84 ng/g wet weight in bivalves. Hexachlorobenzene levels in marine sediments and bivalves were lower thar or comparable to those levels of reported in other countries. Isomeric patterns of some chlorobenzenes in marine sediments and bivalves were slightly different. However, the pre-dominant isomer in marine sediments and bivalves was 1,2,4-trichlorobenzene. Hexachlorobenzene contribution to total concentrations was higher in sediments than in bivalves.

The Economic Analysis of Marine Crime (해상범죄발생의 경제적 원인에 대한 연구)

  • 나호수
    • Proceedings of KOSOMES biannual meeting
    • /
    • 2002.10a
    • /
    • pp.149-160
    • /
    • 2002
  • The relatively rapid rising trends of crime rates in marine situations leads to social concerns in Korea. This study reviews some theoretical backgrounds of the economics of crime and apply econometric models to Korean marine crimes. We find that there is a negative relationship between marine crime rates and unemployment rates and positive relationship between price level and marine crime in Korea. And also we find that unemployment elasticities are higher in the 1980s' and price elasticities are higher in th 90's in comparison with the results of the other periods. This findings are incompatible with the previous theoretical researches in advanced countries. This findings show that in rapidly growing economy, marine crime occurrence is proportional to marine economic activity frequency. This result may reflect that marine crimes are different from land crimes.

  • PDF

A Study on the Marine Science Education Comprehensive Portal Site Construction for Elementary, Middle and High School Students (초중고생을 대상으로 한 포괄적 해양교육 포털사이트 구축을 위한 기반연구)

  • Park, Jong-Un
    • Journal of Fisheries and Marine Sciences Education
    • /
    • v.19 no.2
    • /
    • pp.229-238
    • /
    • 2007
  • The Purpose of this study is to examine the present marine science education programs in Korea and understand how they are organized and how well they are being used. Eventually, being a foothold research prior to the construction of an inclusive marine science education portal site for elementary, middle, and high school students is the objective of this study. Through this study, we can expect three positive effects. First, through classification of marine science education programs, it can be used when dividing the contents and writing textbooks for elementary school students. Second, through the construction of portal site, we can expect to correct the recognition and understanding of marine and it will contribute to the future industry development. Third, we can offer the correct materials for teaching and learning and through learning, understanding on marine will get better.

A study of 'Re-consultation' on Marine Environment Impact Assessment (해역이용협의 제도 상 '재협의'의 개선방안에 대한 고찰)

  • KIM, Hyejin;OH, Hyuntaik
    • Journal of Fisheries and Marine Sciences Education
    • /
    • v.28 no.4
    • /
    • pp.913-924
    • /
    • 2016
  • Re-consultation on Marine Environment Impact Assessment (MEIA) says that business operators are then licensed back from the disposition authorities undergoing a consultation process to change business plans. Marine Environment Management Act has provisions(Article 94) with respect to a case where the scale of business, the period of business, reflects the basic plan, including a plan to change a variety of reasons. But increasingly diverse types of businesses and projects which are the subject of MEIA, As it appears that the vulnerability issues and the problem of the re-consultation. In this study conducted an analysis of the literature review and comment on the re-consultation report four years. In addition, it presents a check to the problem through concrete examples related to the re-consultation and proposes improvement measures.

The Development and Performance Analysis of Multiple Signal Processing Circuit for Marine Installation Sensor (해양설비용 센서의 다중 신호처리 회로 개발 및 성능 분석)

  • Cho, Jeong-Hwan;Ko, Sung-Won
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.28 no.12
    • /
    • pp.84-89
    • /
    • 2014
  • This paper proposes the new multiple signal processing monitoring sensor for the marine installation. The recent marine technology is focused on underwater sensors and underwater sensor networks in order to measure, monitor, surveillance of and control of underwater environments. For these marine applications to be available, however, the provision of precise location information using monitoring sensor is essential. In this paper, the multiple signal processing circuit for obtaining the precise location information of marine installation sensor is developed and analyzed. The performance characteristics for obtaining the location information of marine installation sensor is analyzed. The theoretical and experimental studies have been carried out. The presented results from the above investigation show considerably excellent performance for the monitoring for the marine installation.

Expressed sequence tags analysis of immune-relevant genes in rock bream Oplegnathus fasciatus gill stimulated with LPS

  • Lee, Jeong-Ho;Kim, Ju-Won;Baeck, Gun-Wook;Park, Chan-Il
    • Journal of fish pathology
    • /
    • v.23 no.3
    • /
    • pp.429-440
    • /
    • 2010
  • We constructed a rock bream (Oplegnathus fasciatus) gill cDNA library and a total of 1450 expressed sequence tag (EST) clones were generated. Gene annotation procedures and homology searches of the sequenced ESTs were locally done by BLASTX for amino acid similarity comparisons. Of the 1450 EST clones, 1022 EST clones showed significant homology to previously described genes while 428 ESTs were unidentified, and 259 clones were hypothetical, or unnamed proteins. Encoding 313 different sequences were identified as putative bio-defense genes or genes associated with immune response.

Long-Term Investigation of Marine-Derived Aspergillus Diversity in the Republic of Korea

  • Jun Won Lee;Wonjun Lee;Rekhani Hansika Perera;Young Woon Lim
    • Mycobiology
    • /
    • v.51 no.6
    • /
    • pp.436-444
    • /
    • 2023
  • Aspergillus species play a crucial role in terrestrial environments as degraders and are well known for producing various secondary metabolites. Recently, Aspergillus species have been discovered in marine environments, exhibiting adaptability to high salinity and producing diverse secondary metabolites with valuable properties. However, limited research has focused on their marine diversity, leading to inaccurate species identification. The current study addresses this gap by investigating diverse marine habitats in the Republic of Korea, including sediment, seawater, seaweed, and marine animals. From three coasts of the Korean Peninsula, 472 Aspergillus strains were isolated from the various marine habitats. A total of 41 species were accurately identified using multigenetic markers: internal transcribed spacer, calmodulin, and b-tubulin. The findings underscore the importance of accurate identification and provide a basis for elucidating the functional role of marine-derived Aspergillus species in marine ecosystems.

DNA Barcoding of the Marine Protected Species Parasesarma bidens (Decapoda: Sesarmidea) from the Korean Waters

  • Kim, So Yeon;Yi, Chang Ho;Kim, Ji Min;Choi, Woo Yong;Kim, Hyoung Seop;Kim, Min-Seop
    • Animal Systematics, Evolution and Diversity
    • /
    • v.36 no.2
    • /
    • pp.159-163
    • /
    • 2020
  • Parasesarma bidens(De Haan, 1835) has been designated as a marine protected species by the Act on conservation and management of marine ecosystems. This crab has been recorded only from Jeju-do and Geomun-do, Republic of Korea. In this study, we describe for the first time the mitochondrial cytochrome c oxidase subunit I(COI) sequences of P. bidens. The intra-specific genetic distance among the Korean populations and between the Korean and Chinese populations ranged from 0% to 0.9% and 1.9% to 2.7%, respectively. The inter-specific genetic distances among the four Parasesarma species ranged from 10.9% to 12.8%. The finding of this study will be helpful to better describe P. bidens using COI DNA barcodes and can be used as basic data for their restoration and conservation research.