• 한국수산과학회지
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• 제32권5호
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• pp.563-567
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• 1999

한국산 및 일본산 참굴 종패의 성장과정 중 영양 기능성분을 비교하기 위하여. 이들 양자를 동일 양식장에서 수하기부터 수확기까지 월별로 그들의 일반성분 조성과 a-Toc 함량을 정량하였으며, 그리고 육중량 증가량을 조사하였다. 단백질 함량 (건량기준)은 산란기로 알려진 8월과 9월에 약 $70\~72\%$ (한국산), $75\~76\%$ (일본산)로서 양식과정 중 최고치를 기록하였으나, 탄수화물 함량 (건량기준)은 단백질의 함량과 반대로 이 시기에 최저치를 나타냈으며, 수확기 (11월 이후)에 풍부하였다. 따라서 양자간에는 역의 상관관계를 보여주었다 (r=-0.94, p<0.01). 지질 함량은 한국산 및 일본산 모두에서 산란기인 8월에 약 $1.4\~1.5\%$로서 최저치를 나타냈으나, 전자는 10월에 지질 함량 및 육중량이 또 한차례 감소하였는데, 이것은 산란의 영향으로 해석되었다. 그러나 일본산의 경우는 8월 이후 지질 함량 및 육중량이 지속적으로 증가하였다. 수확기에 개체당 육중량은 한국산의 경우 4.2$\~$4.8g 이었으나, 일본산의 경우는 7.5$\~$8.3 g으로 전자가 후자에 비하여 약 2배의 육중량을 나타내었다. 개체당 육중량과 지질 함량 사에에는 $y=0,2081e^{1.5696x}$ (r=0.8856, p<0.001)로서 지수함수적으로 비례하였다. 따라서 참굴 개체당 모든 영양성분 함량은 일본산의 경우가 한국산에 비하여 약 2배나 많이 함유하므로, 전자가 우수한 품종으로 판단되었다.

• 한국수산과학회지
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• 제52권4호
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• pp.344-348
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• 2019

This study assessed the microbiological hazards of gloves worn during the shell shucking process of the oyster Crassostrea gigas, and we suggest an in situ method for minimizing microbial contamination. The study consisted of two groups, one in which the working gloves were periodically replaced (PRG) with new gloves, and another in which the gloves were not replaced (NRG). In the PRG group, gloves were replaced every 2 h during 8 h of processing. Food pathogenic bacteria Escherichia coli, Salmonella species, and Listeria monocytogenes were not found in any samples, including gloves and shucked oysters. However, Staphylococcus aureus (SA) was detected in some samples, and the contamination levels were correlated with the working time and the regular replacement of gloves. SA was not detected on gloves or oysters of the PRG group. However, it was detected in the range of <$15CFU/15cm^2$ to $2.9{\times}10^2CFU/15cm^2$ on gloves after 6 h of continuous work, and from <$15CFU/15cm^2$ to $2.23{\times}10^2CFU/15cm^2$ on oysters after 8 h. These results indicate that the SA contamination in shucked oysters originated from the working gloves, and that replacement of working gloves every 2-4 h will minimize SA contamination in oyster products.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 1997년도 정기총회 및 봄 학술발표회 초록집
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• pp.11-13
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• 1997

• 한국동물학회:학술대회논문집
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• 한국동물학회 1997년도 한국생물과학협회 학술발표대회
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• pp.155.2-155
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• 1997

No Abstract, See Full Text

• 한국수산과학회지
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• 제17권4호
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• pp.321-326
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• 1984

열대수역에 서식하는 3종류의 Mangrove 굴을 대상으로 하여 각각의 형태적 특성을 비교하였다. Venezuella산인 Crassostrea rhizophorae는 가장 둥근형태이며 각내용적(殼內容積)이 가장 컸다. 비만도도 가장 높아 $9.63\%$였다. Liberia산인 Crassostrea tulipa는 외형에서 가장 길죽한 형태이며 각내용적은 크지만 비만상태는 $8.15\%$로 중간이었다. Indonesia산인 Crassostrea belcheri는 Venezuella산과 갈이 둥근 형태이며, 전체 무게와 껍데기 무게는 가장 컸지만 비만도는 가장 낮아 $6.62\%$였다.

• Fisheries and Aquatic Sciences
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• 제2권2호
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• pp.155-160
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• 1999

Studies on detoxification of Paralytic Shellfish Poison (PSP)-infested oyster, Crassostrea gigas were carried out using available processing resources. Changes of paralytic shellfish toxin components and specific toxicity during canning process were also investigated with high performance liquid chromatography (HPLC). Toxic oysters collected at Hachong in Koje Bay were used for experimental samples. The toxicity of oysters with range of 185-778 ug/100g was reduced below the quarantine limit of 80 ug/100g or not detected level by the mouse bioassay after canning process. The mole $\%$ of toxin components in the shucked oyster was in the order of 25.1 mole $\%$ of gonyautoxin 1, 19.2 mole $\%$ of gonyautoxin 3, 17.2 mole $\%$ of gonyautoxin 4 and 14.6 mole $\%$ of gonyautoxin 2. This sample had tracing amounts of Cl, C2, saxitoxin and neosaxitoxin. In the case of specific toxicity, the major toxins were consisted of gonyautoxin 1-4. The sum of gonyautoxin 1, 2, 3 and 4 was 80% of total toxicity of oyster. Saxitoxin and decarbamoylsaxitoxin were the more thermostable than any other toxin components.

• 한국한의학연구원논문집
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• 제6권1호
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• pp.107-116
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• 2000

Vibrio become prevailing if superficial temperature of ocean is raised and their activities of area are expanded and most of ocean creatures(fishes, oysters etc) are polluted with vibrio. The one who has taken these polluted fishes and oysters uncooked caused foodpoisoning and diarrhea from Vibrio. Frequently these diseases breakout is disposed in westsea shore of Korea. According to ancient and traditional Korean medical book - Kumkue Yorak - and their single, we carried out experiment check the activities of natural medicinal effects on Vibrio parahemolyticus. The prescriptions of trial materials are processed from extraction boiling water and 80% methanol and followed by freeze dried and adsorbed to every discs in dosage of 10mg. Gentamycin of 10mg were used for control. The result of compound prescription displayed special diseases in antimicrobial activities of boiling water and MeOH extraction compared with control. In single prescription, extraction of boiling water and MeOH of Schisandra sphenanthera(clear zone : 15mm) presented extraordinal antimicrobial activity. The MBC of Schisandra sphenanthera extracts was expressed 2.56mg/ml in boiling water and MeOH.

• 한국양식학회지
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• 제18권3호
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• pp.200-206
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• 2005

We previously pointed out that the polluted sediment elutriate manifestly affected the early events of reproductive outputs in the Pacific oysters, Crassostrea gigas. A serial dilution of priority xenobiotic sediment elutriates determined by gas chromatography/mass spectrometry (GC/MS) were exposed to gametes of the oyster with different stress burdens to detail the maternal stress transfer to its reproductive outputs. There was an apparent critical concentration over which survival and morphogenesis were significantly affected with more profound damage in morphogenesis. The critical concentration which drives mortality and abnormal morphogenesis of the larvae corresponded to a dilution between 10 and 20% of our elutriate. The adverse effects of the early lives by the xenobiotic exposure over the critical concentration were magnified by the maternal stress from the exposed benzo(a)pyrene (BaP), one of the priority polyaromatic hydrocarbons (PAHs) during the maturation condition. These results indicate that maternal transfer of the xenobiotic compounds from oysters living in the contaminated location might represent a significant adverse effect to their larval population of wild seeds.

• Fisheries and Aquatic Sciences
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• 제16권2호
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• pp.63-69
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• 2013

Shucked oysters were soaked in an equal weight of salt water and stored at $3^{\circ}C$ for 7 days. Changes in the free amino acid content of the whole body and in the adductor muscle were evaluated by a practical distribution method. With the exception of aspartic acid and tyrosine, no significant changes in free amino acids or ammonia were observed in whole-body shucked oysters during the storage period. In contrast, the majority of free amino acids in the adductor muscle decreased significantly. Most of these free amino acids were detected in considerable amounts in the surrounding salt water after 7 days of storage. Both the weight of the whole body and the salinity of the surrounding salt water decreased significantly during the storage period. These results suggest that free amino acids were eluted from the cutting surface of the adductor muscle and indicate that the free amino acid content per shucked oyster and in the adductor muscle, decreases during cold storage.

• 에너지공학
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• 제27권1호
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• pp.1-11
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• 2018

굴은 한국뿐만 아니라 전 세계 곳곳에서 매년 지속적으로 생산되고 있다. 그에 따라 발생하는 부산물인 굴 패각은 처리하기 위한 방안이나 기술적인 한계점으로 인하여 사회, 환경적으로 문제가 되고 있다. 이러한 문제를 해결하기 위해서 버려지는 굴 패각을 재활용하기 위한 다양한 연구가 진행되고 있으며, 특히 저렴한 친환경 소재가 될 수 있어 최근까지 연구가 활발히 진행되고 있다. 본 논문에서는 전 세계적으로 발생하는 굴 패각의 현황을 분석하고, 굴 패각의 물리, 화학적인 특성을 분석하였으며, 현재까지 전 세계적으로 연구되어 온 굴 패각을 활용한 지속 가능성 있는 자원화 방안에 대하여 최근 연구 동향에 대하여 논의하였다.