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STUDIES ON THE SHELLFISH PROCESSING 6. Effect of Antioxidants or EDTA Treatment on the Quality of Pressed-and-Dehydrated Sea Mussel Mytilus edulis (패류 가공에 관한 연구 6. 항산화제 또는 EDTA 처리가 진주담치 압착 건제품의 제조 및 저장중의 품질에 미치는 영향에 대하여)

  • HUR Jong-Wha;LEE Eung-Ho
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.4 no.1
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    • pp.22-30
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    • 1971
  • Sea mussel Mytilus edulis, world-widely distributed, is a sort of popular food in Korea. The demands of high quality and mass production are not being satisfied since it is usually sun dried. A rapid dehydration and the treatment of food additives to improve the quality of the product seems to be required. In this paper, the effect of antioxidants and EDTA treatment was studied when sea mussel was pressed and hot-air dehydrated for 10 hours at 45 to $52^{\circ}C$ under the air flow rate of 3 meter per second. The results are as follows: 1) Cooked and pressed sea mussel was dehydrated mere rapidly than cooked without pressing. 2) The rehydration rate of pressed and dehydrated sea mussel was higher than that of the unpressed. 3) Among six samples, BHA treated material showed the best color preservation during dehydration and storage. The treatment of Teonox-II was also effective following BHA. 4) The effects of antioxidants used during dehydration and storage were in order of BHA, Tenox-II and NDGA treatment, while EDTA was ineffective. 5) No significant difference in rehydration rate was found between those treated with antioxidants or EDTA and the untreated. 6) The amount of soluble protein was higher in the samples treated with antioxidants than in EDTA treated or untreated samples. 7) The results suggest that the treatment of BHA and pressing process produce improved product in quality which gives higher amount of soluble protein and better rehydration, color preservation and preventive effect of rancidity.

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Assessment of benthic environment conditions of oyster and mussel farms based on macrobenthos in Jinhae bay (저서생물상을 이용한 진해만 수하식 양식장의 저서환경 평가)

  • Park Heung-Sik;Yi Soon-Kil
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.5 no.1
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    • pp.68-75
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    • 2002
  • This study were observed to the conditions of organic pollution applying to tile environmental assessments based on macrobenthos around the raft culture ground which became an issue by organic matter input in Jinhae Bay. Three stations, mussel farm, oyster farm and the control station on which rarely culture activities were fixed and have analyzed to the sediment characteristics and macrobenthic communities. Muddy substrates between 6.0 and 6.60 on mean grain size have prevailed to the bottom layer in all stations. The highest organic matter content of 2.8% was observed to the mussel farm while the lowest one of 1.5% was recorded on the control area. As a total, 79 species from seven phyla were identified. Comparing to shell farms, the control station have composed to more diversified community structure. In the mussel and the oyster farm, opportunistic species, living in high organic contents area, Lumbrineris longifolia, Heteromastus. filiformis in polychaetes and Corophium sinense in amphipod were dominated. As results on environmental assessment, in spite of changing to the species composition and densities seasonally, the mussel farm have recorded only to moderately polluted condition.

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On the Occurrence of The Larvae, Spatfall and Early Growth of Mussel Mytilus edulis in Chinhae Bay (진해만에서 진주담치 Mytilus edulis 의 부유유생의 출현, 부착 및 초기성장에 관한 연구)

  • 유성규;임현식;장영진
    • The Korean Journal of Malacology
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    • v.6 no.1
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    • pp.1-10
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    • 1990
  • The occurrence of the larvae, the size of the spats daily attached to the collectors, the difference of the spat size with temperature, and the darly growth of a mussel, Mytilus edulis, were investigated at the off Songpo, Chinhae Bay, the southern part of Korea during the period from March 1 to August 30 in 1986. The water timperature and specific gravity ranged from 7.0 $^{\circ}C$ to 27.4$^{\circ}C$ (mean 17,24$\pm$5.9$0^{\circ}C$), and from 1.0126 to 1.0126(mean, 1.0242$\pm$0.0023), respectively. D-shaped larvae had two peak occurrences in March 8, April 19, Umbo-shaped larvad three peaks in March 8, April 21 and June 17, and full grown larvae two peaks in May 13 and June 23, respectively. Therefore, it is assumed that the mussel had two mass spawning time in early March and mid April and two mass settling time in mid May and alte June. The maximum size of the planktonic mussel larvae ranged from 375-400${\mu}{\textrm}{m}$ and most larvae sizing below 300${\mu}{\textrm}{m}$ long settled in adquate substrate. Spats just after settlement had the range from 26.5 to 547.3${\mu}{\textrm}{m}$ with the minimum of 225.0 ${\mu}{\textrm}{m}$ in mean shell length. The spats settled in summer season, when the water temperature raised above $25^{\circ}C$, were smaller than those settled in spring season in mean shell length. The early growth of the mussel spat had been assumed considerably fast.

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Studies for Reestabilishment of Approval Toxin Amount in Paralytic Shellfish Poison-Infested Shellfish 1. Toxicity Change in Paralytic Shellfish Poison-Infested Blue mussel, Mytilus edulis and Oyster, Crassostrea gigas during Boiling and Canning Processes

  • KIM Young-Man;CHOI Su-Ho;KIM Sung-Joon;SUH Sang-Bok;PYUN Han-Suck;CHANG Dong-Suck;SHIN Il-Shik
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.29 no.6
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    • pp.893-899
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    • 1996
  • The studies on the detoxification of paralytic shellfish poison (PSP)-infested blue mussels, Mytilus edulis and oyster, Crassostrea gigas were performed for using of available processing resource. Toxic blue mussel and oysters from Nampo in Masan Bay, Hachong in Koje Bay and Woepori in Koje were used for experimental samples. The toxicity of low toxic blue mussel $(A,\;84{\mu}g/100g;\;B,\;166{\mu}g/100g;\;C,\;295{\mu}g/l00g;\;D,\;557{\mu}g/100g)$ and oyster $(740{\mu}g/100g)$ were reduced below the regulation limit of PSP $(80{\mu}g/100g)$ or undetected level by mouse bioassay after boiling at $98^{\circ}C$ for 10 min and retorting at $115^{\circ}C$ for 70 min, while the toxicity of high toxic blue mussel $(E,\;8,760{\mu}g/100g)$ remained beyond the regulation limit after boiling and retorting at same condition. These results suggested that the regulation limit of PSP could be level up from $(80{\mu}g/100g)$ to about $160{\mu}g/100g$.

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Antifouling Activity towards Mussel by Small-Molecule Compounds from a Strain of Vibrio alginolyticus Bacterium Associated with Sea Anemone Haliplanella sp.

  • Wang, Xiang;Huang, Yanqiu;Sheng, Yanqing;Su, Pei;Qiu, Yan;Ke, Caihuan;Feng, Danqing
    • Journal of Microbiology and Biotechnology
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    • v.27 no.3
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    • pp.460-470
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    • 2017
  • Mussels are major fouling organisms causing serious technical and economic problems. In this study, antifouling activity towards mussel was found in three compounds isolated from a marine bacterium associated with the sea anemone Haliplanella sp. This bacterial strain, called PE2, was identified as Vibrio alginolyticus using morphology, biochemical tests, and phylogenetic analysis based on sequences of 16S rRNA and four housekeeping genes (rpoD, gyrB, rctB, and toxR). Three small-molecule compounds (indole, 3-formylindole, and cyclo (Pro-Leu)) were purified from the ethyl acetate extract of V. alginolyticus PE2 using column chromatography techniques. They all significantly inhibited byssal thread production of the green mussel Perna viridis, with $EC_{50}$ values of $24.45{\mu}g/ml$ for indole, $50.07{\mu}g/ml$ for 3-formylindole, and $49.24{\mu}g/ml$ for cyclo (Pro-Leu). Previous research on the antifouling activity of metabolites from marine bacteria towards mussels is scarce. Indole, 3-formylindole and cyclo (Pro-Leu) also exhibited antifouling activity against settlement of the barnacle Balanus albicostatus ($EC_{50}$ values of 8.84, 0.43, and $11.35{\mu}g/ml$, respectively) and the marine bacterium Pseudomonas sp. ($EC_{50}$ values of 42.68, 69.68, and $39.05{\mu}g/ml$, respectively). These results suggested that the three compounds are potentially useful for environmentally friendly mussel control and/or the development of new antifouling additives that are effective against several biofoulers.

Preparation of Retort Pouched Seasoned Sea Mussel and Its Quality Stability during Storage (레토르트파우치 조미 홍합의 제조 및 저장 중 품질 변화)

  • Noh, Yu-Ni;Yoon, Ho-Dong;Kong, Cheung-Sik;Nam, Dong-Bae;Park, Tae-Ho;Kim, Jeong-Gyun
    • Journal of Fisheries and Marine Sciences Education
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    • v.23 no.4
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    • pp.709-722
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    • 2011
  • This study was investigated to obtain basic data which can be applied to processing of retort pouched seasoned sea mussel. Shell was washed and steamed before shucking. Sea mussel meat was seasoned in boiled and mixed seasoning sauce(soy sauce 23%, monosodiun glutamate 2%, sorbitol 2%, sesame oil 1%, vinegar 2%, starch syrup 15%, water 55%) for 30 min. The seasoned sea mussel was vacuum packed in plastic film bag and sterilized for various Fo values(Fo 7~13 min.) in a hot water circulation system retort at $121^{\circ}C$. The chemical composition such as pH, VBN, amino-N, total amino acid, free amino acid, color value (L, a, b), texture profile, TBA value, mineral, sensory evaluation and viable cells count of the retort pouched seasoned sea mussels sterilized with various conditions(Fo 7~13 min.) were measured. The same experimental items were also measured during storage. There was no remarkable difference between sterilization conditions and sensual characteristics. The results showed that the product sterilized at Fo 7 min. was the most desirable because this condition is most economical.

Processing and Quality Characteristics of Sea Mussel Mytilus edulis Sauces from Sea Mussel Complex Extract (진주담치(Mytilus edulis) 복합추출물을 이용한 진주담치소스의 제조 및 품질특성)

  • Kim, Seon-Geun;Cho, Jun-Hyun;Hwang, Seok-Min;Nam, Hyeon-Gyu;Choi, Jong-Duck;Oh, Kwang-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.6
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    • pp.656-661
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    • 2017
  • To develop a highly value-added product from extract from small and damaged sea mussels Mytilus edulis, we prepared two types of sea mussel sauce (MS): bottled (BMS) and retort pouched (RMS). We investigated the processing conditions, quality metrics and flavor compounds in each type of sauce. We found that the most appropriate base formulation for both BMS and RMS consisted of 40.0% SME (Brix $30^{\circ}$), 15.0% sugar, 6.0% salt, 4.0% monosodium glutamate, 4.0% soy sauce, 3.5% starch, 3.0% yeast extract, 3.5% wheat flour and 21.0% water. The crude protein, salinity, volatile basic nitrogen and amino-nitrogen content of the BMS and RMS were 8.7% and 8.8%, 9.3% and 9.2%, 24.9 and 31.4 mg/100 g, and 468.5 and 455.1 mg/100 g, respectively. For comparison, the ranges of these values in commercial oyster sauces (COS) are 4.7-7.5%, 10.7-12.0%, 8.2-12.5 mg/100 g, and 225.7-448.2 mg/100 g, respectively. The total free amino acid content of RMS and Premium COS was 7,215.7 and 6,160.7 mg/100 g, respectively, and the main free amino acids were glutamic acid, taurine, glycine, alanine, arginine, proline and lysine. These results demonstrate that BMS and RMS have favorable organoleptic qualities and good storage stability compared to COS, and are suitable for commercialization as high-flavor seasoning sauces.

Spawning in Mussel and Adaptation Strategy of Acheilognathus signifer (Cyprinidae: Acheilognathinae) (묵납자루, Acheilognathus signifer (Cyprinidae; Acheilognathinae)의 패 내 산란과 적응전략)

  • Baek, Hyun-Min;Song, Ho-Bok
    • Korean Journal of Ichthyology
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    • v.17 no.2
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    • pp.105-111
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    • 2005
  • Most of the eggs and (or) pre-larvae of Acheilognathus signifer were observed from the gills of Unio douglasiae sinuolatus, 30~45 mm in the shell length, that is the host mussel of A. signifer. There was no selectivity in proportion to mussel size at the range observed. One to seven individual eggs and (or) pre-larvae were found in the mussels, with a mean of 2.5 individuals, and the rate of possessing one egg and (or) pre-larva was 50.0%. When the prelarva of A. signifer acquired swimming ability inside the mussel, it moved into the suprabranchial chamber. It was estimated that the growth period was 4~6 weeks. The minute tubercles of the pre-larvae were observed immediately after hatching. Absorption of the minute tubercles was observed starting the 7 th day, with most of tubercles absorbed 13 days after hatching and completed 20 days after the yolk was entirely absorbed.

Processing and Characteristics of Canned Seasoned Sea Mussel (조미 홍합 통조림의 제조 및 특성)

  • Park, Tae-Ho;Noe, Yu-Ni;Lee, In-Seok;Kwon, Soon-Jae;Yoon, Ho-Dong;Kong, Cheung-Sik;Nam, Dong-Bae;Oh, Kwang-Soo;Kim, Jeong-Gyun
    • Journal of Fisheries and Marine Sciences Education
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    • v.24 no.6
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    • pp.820-832
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    • 2012
  • This study was investigated to obtain basic data which can be applied to processing of canned seasoned sea mussel. Shell was washed and steamed for 10 min before shucking. Sea mussel meat was seasoned with mixed seasoning sauce(soy sauce 23%, monosodiun glutamate 2%, sorbitol 2%, sesame oil 1%, vinegar 2%, starch syrup 15%, water 55%) for 30 min The seasoned sea mussel 60 g was vacuum packed in RR-90 can and fill with seasoning sauce 30 mL and grape seed oil 30 mL respectively, and then there was sterilized for various Fo values(Fo 8~12 min) in a steam system retort at $121^{\circ}C$. pH, VBN, amino-N, total amino acid, free amino acid, color value, texture profile, TBA value, mineral content, sensory evaluation and viable cells count of the canned seasoned sea mussels sterilized with various conditions(Fo 8~12 min) were measured. The same experimental items were also measured during storage. There was no remarkable difference between sterilized conditions and sensual characteristics. The results showed that the product of filled with grape seed oil sterilized at Fo 8 min was the most desirable.

Surface Interactions of Model Peptides for Mussel Adhesive Protein

  • Cho, Eun-Kyung;Lee, Yoon-Hee;Cho, Nam-Jun;Cha, Hyung-Joon
    • 한국생물공학회:학술대회논문집
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    • pp.630-633
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    • 2003
  • The mussel adhesive protein Mefp-1 is a natural, strong and durable adhesive that is stable under corrosive, saline conditions. Mefp-1 is found in the marine mussel Mytilus edulis and it has a molecular weight of ca. 130,000. The primary structure is mainly composed of repeating decapetides: Ala-Lys-Pro -Ser-Tyr Hyp-Hyp-Thr-DOPA-Lys. To elucidate the mechanism by which Mefp-1 bonds to metal surfaces, we have used surface-enhanced Raman spectroscopy to study the interactions of peptides related to the Mefp-1 decapeptide repeat with gold surfaces. We have concluded that the tyrosine residue and the carboxyl terminus interact strongly with the gold surface, and that proline and hydroxyproline constrain the conformations of the peptides, thereby limiting the types of possible interactions of the functional groups with the gold surface.

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