• 한국양식학회:학술대회논문집
• /
• 한국양식학회 2006년도 수산관련학회 공동학술대회 발표요지집
• /
• pp.163-165
• /
• 2006

• Natural Product Sciences
• /
• 제1권1호
• /
• pp.5-9
• /
• 1995

The metabolites of marine mollusk Mytilus edulis were isolated and characterized, revealing the presence of the rare free fatty acids and proteinogenic amino acids together with a non-proteinogenic free amino acid, taurine. The free fatty acids in this organism were particularly interesting for the presence of both unusual n-6 acid [20:4 (n-6)] and triple bond containing acid (2,5-octadecadiynoic acid). In addition to the proteinogenic amino acids commonly found in proteins, non-proteinogenic free amino acid taurine was isolated and the structure was determined by its physicochemical properties. Recently taurine has been given much interest in the molecular level because of diverse biological activities and the medicinal properties. Furthermore, the result of the analyses of analyses of free amino acids showed that glycine, glutamic acid, serine and alanine, which were considered to be related to the taste of this organism, are predominantly present.

• Journal of Microbiology and Biotechnology
• /
• 제12권4호
• /
• pp.699-701
• /
• 2002

The current study demonstrates the ability of the marine cyanobacterium Oscillatoria willei BDU130511 to disinfect raw sewage. Within a holding time of 3 h under laboratory conditions, the organism drastically reduced in the total bacterial and coliform counts at various pH levels, in both unbuffered and buffered sewage, thereby suggesting a potential role for cyanobacteria in wastewater treatment.

• 한국미생물·생명공학회지
• /
• 제38권1호
• /
• pp.19-23
• /
• 2010

Recently, marine organisms are emerging as a leading group for identifying and extracting novel bioactive substances. These substances are known to possess a potential regarding not only as a source of pharmaceutical products but also their beneficial effects on humans. Among the substances, antimicrobial peptides (AMPs) specifically have attracted considerable interest for possible use in the development of new antibiotics. AMPs are characterized by relatively short cationic peptides containing the ability to adopt a structure in which cationic or hydrophobic amino acids are spatially scattered. Although a few reports address novel marine organisms-derived AMPs, their antimicrobial mechanism(s) are still remain unknown. In this review, we summarized the peptides previously investigated, such as Pleurocidin, Urechistachykinins, Piscidins and Arenicin-1. These peptides exhibited significant antimicrobial activities against human microbial pathogens without remarkable hemolytic effects against human erythrocytes, and their mode of actions are based on permeabilization of the plasma membrane of the pathogen. Therefore, the study of antimicrobial peptides derived from marine organisms may prove to be useful in the design of future therapeutic antimicrobial drugs.

• Fisheries and Aquatic Sciences
• /
• 제7권3호
• /
• pp.141-147
• /
• 2004

Sixteen polycyclic aromatic hydrocarbons (PAHs) were analyzed in seventy marine organisms (40 species) from the Korean coast. PAHs were present in all the organisms. The level of total PAHs in the organisms varied from 0.45 to 224 ng/g dry weight and the carcinogenic PAHs varied from 0.05 to 49.8 ng/g dry weight. The PAHs residues according to the marine organisms showed a highest content in bivalve species, and followed by crustaceans, cephalopods, fish and gastropods. Human dietary intake of total PAHs through marine organism in Korea was estimated to be 4.12 ng/kg body weight/day and 0.67 ng/kg body weight/day for carcinogenic PAHs. The relative contributions of individual species to the total dietary intake of PAHs were in the order of bivalves $(53.4{\%})$, fish $(21.9{\%})$, crustaceans $(15.3{\%})$, cephalopods $(8.8{\%})$ and gastropods $(0.6{\%})$. Daily dietary intake of $PAH_{TEQ}$ expressed as a TEQ value was estimated to be 0.13 pg TEQ/kg body weight/day, which did not exceed a tolerable daily intake (TDI) proposed by the KFDA and the WHO as well as the UK toxicity committee. Lifetime cancer risk due to ingestion of marine species by the Korean adult was evaluated using the equation estimating exposure of food ingestion. Although approximately $23{\%}$ of cumulative frequency of the sampled marine species exceeded the cancer risk guideline, lifetime cancer risk associated with marine organism consumption was negligible. Results indicate that dietary intake of PAHs through the consumption of the Korean marine organisms seems to be safe for human ingestion with negligible cancer risk.

• 한국수산과학회지
• /
• 제32권4호
• /
• pp.466-469
• /
• 1999

전세계의 담수역에 널리 분포하는 Daphnia나 Moins와 같은 담수산 물벼룩은 잉어, 붕어, 금붕어와 같은 담수어의 종묘 생산과정에서 먹이 생물로서 널라 이용되고 있다. 그러나, 해산어의 종묘 생산 과정에서는 안정 배양, 대량 배양이 어렵다는 이유로 로티퍼나 알테미아 이외에 널리 이용되는 먹이 생물은 거의 없다. 이 연구에서는 해산 물벼룩보다는 비교적 배양이 용이한 기수산물벼룩 D. celebensis의 배양 용기의 크기가 안정배양에 미치는 영향을 검토하였다. 종 보존 배양 수준의 40ml 배양에서는 16일간의 배양 기간중 14일째에 최고 밀도가 3.416$\pm$0.396 ind./ml에 달하였다 1,500ml와 15,000ml의 준 대량 배양에서는 각각 배양 개시후 12일째와 21일 째에 14.2$\pm$2.122 ind./ml와 2.489$\pm$1.618 ind./ml의 최고 밀도가 관찰되었다. 그리고 실험 기간중 배양의 안정도를 평가하기 위하여 실시한 세가지 배양 수량간 상대적 개체군 증식 지수 (RPGI)의 비교 결과에서는 1,500ml의 배양 용기에서 가장 안정적인 증식양상을 보였다. 뿐만 아니라, 매일 수확 가능한 기수산 물벼룩 D. celebensis의 개체수를 계산한 결과에서도 (possible harvesting number/ind./ml/day) 1,500ml의 배양 용기에서 가장 높은 3.567$\pm$0.607ind./ml/day가 수확 가능하였다. 한때 필요성에 의하여 담수산 물벼룩을 해산어의 종묘생산 과정에서 먹이생물로 이용한 시기가 있었다. 그러나, 앞으로는 기수산 물벼룩을 해수에서 배양하여 해산 자치어의 먹이생물로 이용할 수 있을 것이다.

• 한국패류학회지
• /
• 제10권2호
• /
• pp.24-40
• /
• 1994

Marine environmintal pollution studies using bivalves as an indicator organism are described. The utility of the' Mussil Watch in providing a measure of environmental persistent pollutants is also reviewed. Finally, the data from the korea Mussel Watch in 1990 are prisented and compared with those from other regions in the world.

• 생명과학회지
• /
• 제28권10호
• /
• pp.1179-1185
• /
• 2018

최근 괭생이모자반(Sargassum horneri)은 제주의 해안가와 해변, 연근해 양식장 등 매년 대량으로 속출되어 인근 양식업자 및 주민에게 막대한 피해를 주고 있는 추세이다. 본 연구에서는 제주 인근 연안으로 흘러 들어온 괭생이 모자반에 서식하고 있는 미생물의 다양성을 탐색하고 동정을 통한 미생물의 기능을 파악함으로써 생태학적 문제에 관한 기초자료를 제공하고자 하였다. Proteobacteria는 분리 된 균주 중 88%를 차지한 우점문으로 ${\alpha}-proteobacteria$강은 6속 10종으로 Pseudorhodobacter속이 40%를 차지하고 Paracoccus속 20%, Rhizobium, Albirhodobacter, Skermanella 및 Novosphingobium 속은 각각 10%를 차지했다. ${\beta}-proteobactera$강은 5속 10종으로 Hydrogenophaga속이 50%, Azoarcus 20%, 나머지 Oxalicibacterium, Duganella, Xenophilus속은 각각 10%를 차지했다. ${\gamma}-proteobacteria$강은 13속 57종으로 Proteobacteria문에서 74%로 우점강을 차지했고, Shewanella는 23%, Pseudomonas속 12%, Cobetia 19%, Rahnella, Vibrio 및 Serratia속은 4%, 나머지 Rheinheimera, Raoultella, Pantoea, Acinetobacter, Moraxella 및 Psychrobacter속은 2%를 차지했다. Actinobacteria는 1속 2종으로 Gordonia와 Nocardioides속이 각각 50%를 나타냈다. Bacteroidetes문은 3속 5종으로 Lacihabitans, Mariniflexile속은 33%, 나머지 Dyadobacter, Cellulophaga와 Ferruginibacter속은 11%를 차지했다.

• 한국마린엔지니어링학회:학술대회논문집
• /
• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
• /
• pp.149-150
• /
• 2006

Displayed result that handle particle contaminant and hydrospace organism included in number of ballast that is happened in ship using automatic back washing filter. Reason that remove first contaminant that is included in number of ballast is that heighten processing effect of after processing process. of the filter. Another advantage is to drop oft the solids with controlling revolution of drum screen in pretreatment filtration process. The fact that it is easy to attach and detach a several type of screen for getting the expected water quality is another advantage. Filter rotation speed at 1.0rpm is filter resistance 3.0bar and 3.0rpm is filter resistance 2.8bar. Filter out impurities from ballast water over 6.0rpm is filter resistance 2.6bar and 10rpm is filter resistance 2.5bar. Filtration system removal aquatic organism over $80{\mu}m$ in ballast water. This study shows that the filtration treatment system has a potential for the treatment of ballast water.

• 한국발생생물학회지:발생과생식
• /
• 제20권4호
• /
• pp.305-314
• /
• 2016

The marine medaka, Oryzias dancena is a suitable sample as a laboratory animal because it has a small size and clearly distinguishes between female and male. Data on the growth and maturity of the diploid and triploid sea cucurbit species suitable for laboratory animals are very useful for studying other species. Triploidy was induced in the marine medaka by cold shock treatment ($0^{\circ}C$) of fertilized eggs for 45 min, applied two minutes after fertilization. The diploid and triploid male fish were larger than their female counterparts (P<0.05), and the concentrations of thyroid stimulating hormone (TSH) and thyroxine (T4) were higher in the induced triploids over 1 year (P<0.05). In both the diploid and tri-ploid groups the concentrations of TSH and T4 were higher in the male fish than in the females (P<0.05), while the testo-sterone and estradiol-$17{\beta}$ concentrations in the induced triploids were lower than in the diploids (P<0.05). The gonadosomatic index (GSI) of the triploid fish was lower than that for the diploids, and the GSI for females in each ploidy group were higher than that for the males. For both groups the GSI was highest at 4 months of age, and decreased thereafter to 12 months. Analysis of the gonads of one-year-old triploid fish suggested that the induction of triploidy probably causes sterility in this species; this effect was more apparent in females than in males.