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

• Journal of Microbiology and Biotechnology
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• 제10권3호
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• pp.423-428
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• 2000

Bacteriocins are classified as proteins which are produced by heterogeneous groups of bacteria, having and antimicrobial effect of the closely related organisms. Recently, bacteriocins derived from lactic acid bacteria and other food-related organisms have been the subject of much research on potential food biopreservatives. The goal of this study was to screen and characterize the bacteriocinogenic lactic acid bacteria from Jeot-gal(commercial fermented fish foods). All bacteriocinogenic isolates were identified as lactic acid bacteria. Isolates NK24, NK34, and SA72 were tentatively identified as Lactobacillus brevis, according to the API 50 CHL kit database. All antimicrobial substances produced from four lactic acid bacteria isolates completely lost their antibacterial activity after being treated with some proteases, indicating to their proteinaceous nature. The bacteriocin produced from isolates NK24, NK34, and SA72 showed a broad spectrum of activity when compared to those produced from isolate SA131. All bacteriocins isolated during the course of this study showed a bactericidal mode of inhibition.

• 한국물환경학회지
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• 제30권6호
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• pp.683-690
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• 2014

Nanomaterials are used in a range of fields, including industry, medicine, aerospace, and manufacturing, due to their unique and useful properties. In recent years, nanotechnology has developed rapidly, and the amount of nanomaterials used in various fields has increased consistently. As a result, nanomaterials are released into the aquatic and soil ecosystem, posing potential risks to organisms and environment. These materials can enter the cells and may cause serious damage to organisms. Furthermore, they can be transferred through trophic levels and food web, thereby leading to bioconcentration and biomagnification. In this study, we analyzed the trends in research on food chain transfer of nanomaterials and investigated the techniques used in the research. Although many studies have been underway, there is a need for further advanced studies on higher trophic levels and complex microcosm and mesocosm. Furthermore, study topics should be expanded to include various types of nanomaterials and varied species and trophic levels.

• Fisheries and Aquatic Sciences
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• 제8권4호
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• pp.201-206
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• 2005

Microalgae are widely used for mass culture of the rotifer Brachionus plicatilis in aquaculture. Since the nutritional value of the rotifer is closely related to its food, the nutritional value of its food should be known in detail. Chlorella ellipsoidea and Nannochloris oculata are re­presentative food organisms for rotifers that are easily cultured. Therefore, the nutritional values of these micro algae were examined for ultrasmall, small, and large rotifers and Artemia nauplii. Chlorella ellipsoidea contained seven times more total fatty acids than N. oculata. The three types of rotifer fed N. oculata contained more amino acids than those fed C. ellipsoidea. However, the total fatty acids of the rotifers fed each microalga species differed according to the type of rotifer. Newly hatched Artemia nauplii contained more protein and had a higher dry weight than those fed microalgae for 6 h. As with the rotifers, the Artemia nauplii fed N. oculata contained more protein and amino acids than those fed C. ellipsoidea, while the reverse was true for the total fatty acid content. Our results suggest that N. oculata is a good supply of protein, while C. ellipsoidea is a good source of lipids as food organisms for rotifers and Artemia nauplii in aquaculture.

• 수산해양교육연구
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• 제26권1호
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• pp.1-9
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• 2014

One of freshwater rotifer (Brachionus calyciflorus) is very useful as a live food organism for early larval rearing of freshwater aquaculture industry. However, the knowledge about freshwater rotifer culture is scarce. On the other hand, marine rotifer culture as live food organisms is done, almost perfectly. In this study, I show to be benefit experimental results for successful freshwater larval rearing through the observation with microcosm structure in freshwater rotifer culture tanks.

• 한국식품영양과학회:학술대회논문집
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• 한국식품영양과학회 2001년도 International Symposium on Food,Nutrition and Health for 21st Century
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• pp.152-160
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• 2001

The ability of microbial strains to confer health benefits to human and animal hosts is not a feature of many organisms. Lactic acid bacteria are the most commonly used bacteria applied as probiotics and there is now strong evidence that certain strains confer tangible benefits to the host. In terms of preventing infection, the ability of probiotic lactobacilli to colonize the tissue site, even temporarily, and inhibit growth and adhesion of pathogens, has been documented. Using molecular tools, such as RAPD and DGGE, probiotic organisms can be tracked through the intestine and in the vagina, and their impact on the flora assessed. Arguably, strains L. rhamnosus GG and GR-l are the most studied probiotic strains in terms of human application to the gut (GG and GR-l) and vagina (GR-1). Combined with L. fermentum RC-14, GR-l provides a two-pronged therapeutic for the intestine and urogenital tract. Care in manufacturing and distribution is essential to ensure that optimal doses of probiotics are accessible to consumers and patients.

• 한국어류학회지
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• 제35권1호
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• pp.30-38
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• 2023

쌀미꾸리 Lefua costata의 섭식생태를 밝히기 위해 2013년 1월부터 12월까지 강원도 강릉시 옥계면 남양리에서 조사를 실시하였다. 쌀미꾸리는 주로 수온 5℃ 이상 되는 3월부터 12월까지 섭식을 하였고, 섭식률은 4~5월, 9~10월에 정점을 보였다. 위 내용물을 상대중요성지수(IRI)로 분석한 결과, 주로 절지동물문(Arthropoda) 곤충강(Insecta)의 파리목(Diptera, 77.1%), 하루살이목(Ephemeroptera, 20.3%), 날도래목(Trichoptera, 1.7%), 잠자리목(Odonata, 0.4%)이었으며, 그 외 먹이생물은 환형동물문(Annelida)의 턱거머리목(Arhynchobdellida, 0.6%)과 실지렁이목(Tubificida, 0.1%), 선형동물문(Nematoda, 0.2%), 어류(Actinopterygii, 0.1%), 연체동물문(Mollusca)의 백합목(Veneroida) 등 다양하였다. 계절별로 보면, 봄에는 파리목(55.4%)과 하루살이목(41.6%)을, 여름에는 파리목(92.7%)과 환형동물문(Annelida, 6.8%)을, 가을에는 파리목(70.8%)과 하루살이목(9.0%), 날도래목(8.1%), 환형동물문(7.7%)을 주로 섭식하였다. 연령별로 보면 당년생 치어(0+)는 비교적 먹이 크기가 작은 파리목(주로 깔따구과(Chironomidae), 98.2%)만 거의 섭식한 반면, 성장하면서 파리목의 비율이 점점 감소하고 비교적 크기가 큰 하루살이목과 환형동물문의 비율이 증가하였다. 먹이 생물 크기는 당년생 치어(0+) 2.5±1.05 mm, 1년생(1+) 3.2±1.29 mm, 2년생(2+) 3.7±2.05 mm, 3년생 이상(≥3+) 6.8±4.97 mm로 성장하면서 급격히 커지는 경향을 보였다.

• 한국양식학회:학술대회논문집
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• 한국양식학회 2001년도 추계 한국양식학회 학술대회
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• pp.249-250
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• 2001

• ALGAE
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• 제19권1호
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• pp.7-14
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• 2004

Blue-Min was initially developed as an adsorbent for harmful gas removal and recently improved to apply to livestock, agriculture and aquaculture as an assistant feed. In the Blue-Min treatment, growth of harmful algae (Cochlodinium polykrikoides and the others causing the red-tide in the ocean) were inhibited below 10% in comparison with control and coagulation removal of harmful alge with Blue-Min treatment was more efficient than that of yellow loess treatment. It would be expected that the Ble-Min can be useful for the extirpator against the red-tide organisms and restrain the toxic algal growth around the fish aquaculture using the assistant feed. Recently, its utility has become to be diverse as it was revealed that aquaculture productivity increase by its application and, in addition, that it improve the water quality or sediment conditions in the aquaculture of Chinese White Shrimp. When Blue-Min was treated with the proper dose, the growth inhibition of Microcystis aeruginosa and lsochrysis galbana, which are typical red-tide organisms in freshwaters and food organisms in aquaculture, respectively, were less than that of marine red-tide organisms, while their growth slightly increased with low concentration treatiment. In addition, polyunsaturated fatty acids (PUFA) content of I. galbana slightly increase with the Blue-Min treatment. Through our research, the Blue-Min has diverse and comples function against various biological organisms and is proved as a biological activator or depressor.

• 대한가정학회지
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• 제43권2호
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• pp.175-189
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• 2005

This study analyzed the degree of demand for genetically modified organisms(GMOs) to provide the basic information for consumers' reasonable purchase decision making and their right to know about GMOs. Based on the (Ed-there are no study results above) study results, the following suggestion were made. First, throughout the survey, it was found that those consumers who participated had a high level of perception on the harm of GMOs. Therefore, reliable organizations such as government agencies are required to present the results of safety tests and formulate plans related to the safety of GMOs. Second, the average score on consumers' level of consumer knowledge on GMOs was very low, being 1.68 out of a possible 8 points. Third, since women and housewives engaged in dietary habits and food had high demand for information on GMOs, it is necessary to provide women with information on GMOs. Fourth, since it is difficult to confirm the presence or absence of GMOs. in rapidly increasing demand for fast-food, it is necessary that consumers be provided with relevant information and make a reasonable judgement in purchasing food. Fifth, it is necessary to provide detailed regulations and measures for concrete contents and directions of information on GMOs. Sixth, it is necessary to provid information on GMOs from the commercial sources of information that are most preferred by consumers.