• Title/Summary/Keyword: seafood by-products

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Occurrence of Vibrio parahaemolyticus in Fishery Products from the Southwestern Coast of Korea

  • Yoon, Chang-Yong;Kang, Kil-Jin
    • Food Science and Biotechnology
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    • v.15 no.4
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    • pp.578-581
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    • 2006
  • Fishery products were collected in seafood markets located on the southwestern coast of Korea between 2000 and 2004 and examined for the presence of Vibrio parahaemolyticus. This strain was detected in 138 of 843 samples (16.4%) that included dams, eels, crabs, octopuses, and cockles. The number of positive findings for V. parahaemolyticus among fishery products was the highest in dams at 23.6% followed by eels at 22.1%, crabs at 21.1%, octopuses at 18.0%, and cockles at 14.3%. V. parahaemolyticus was detected with overall frequencies of 15.3, 14.8, 13.8, 21.6, and 18.6% from 2000 to 2004, respectively. The monthly occurrence of the organism rapidly increased to over 20% between June and October. The monthly cases of food borne disease caused by V. parahaemolyticus in Korea over the last five years began to increase in August and reached its peak in September. However, the potential for outbreaks of food borne disease caused by V. parahaemolyticus was relatively minor between November and April. Consequently, this study shows that fishery products harvested from June to October must be handled sanitarily in Korea.

Comparisons of the Sensory and Physicochemical Characterizations of Alaska Pollock Theragra chalcogramma Roe by Grade (명란의 등급별 관능적 및 이화학적 품질 특성 비교)

  • Jeong, Hyo-Pin;Cha, Jang Woo;Yoon, In Seong;Lee, Jung Suck;Heu, Min Soo;Jeong, Eun-Jeong;Kim, Jin-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.52 no.3
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    • pp.199-208
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    • 2019
  • The present study compared the sensory and physicochemical characterizations of Alaska pollock Theragra chalcogramma roe according to the L, M, S, 2S, KA, KB, KC, and G grades. The mean weights of the Alaska pollock roe were 81.2 g (74.1-85.7 g) in the L grade, 48.4 g (41.1-54.8 g) in the M grade, 38.6 g (33.5-45.6 g) in the S grade, 29.3 g (25.7-34.2 g) in the 2S grade, 45.7 g (41.4-50.0 g) in the KA grade, 41.4 g (37.7-46.1 g) in the KB grade, 38.3 g (36.0-42.6 g) in the KC grade, and 15.0 g (14.2-15.6 g) in the G grade. The results of the sensory (transparency, physical damage, texture, and odor) and physicochemical (moisture, amino nitrogen and volatile basic nitrogen contents, Hunter redness, and texture) evaluations revealed that, in the normal group, the quality of Alaska pollock roe was highest in the L grade followed by the M, S, and 2S grades whereas, in the cut-group order, the quality was highest in the KA grade followed by the KB, KC, and G grades. The present results suggest that the L, M, S, 2S, KA, and KB grades could be used for high-quality Alaska pollock roe products.

Development of Native Local Foods Associated with Regional Festival - Focused on Hampyeong "Butterfly Festival" - (지역 축제와 연계한 향토 음식 개발 방안 - 함평 "나비축제"를 중심으로 -)

  • Jang, Jeong-Oak;Yoon, Hae-Kyung;Lee, Young-Mi;Jung, Jae-Hong;Yang, Mi-Ok
    • Journal of the East Asian Society of Dietary Life
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    • v.18 no.4
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    • pp.428-435
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    • 2008
  • This study was conducted to provide the information necessary for the development of native local foods associated with the "2008 World Insect Festival in Hampyeong" and to contribute to the efforts to market the festival as tourist attraction and increase the income of the local community. To assess the local foods and restaurants, we investigated the principal products, inclination for sightseeing and recognition of the "Butterfly festival" by distributing questionnaires to local restaurant operators, employees and general tourists. The result was as follows: 1. The general tourists chose scenery as the most important factor in a sightseeing tour, followed by food, lodging, and transportation. 2. The tourists enjoyed eating native local foods, and they indicated that the taste was important. 3. Regarding the cost of food, 53.6% of the respondents answer that 10 to 20 thousand won was a resonable price, and they also reported wanting to eat seafood in Hampyeong. Thus the Menu of seafood to be served at the Hampyeong festival needs to be developed first followed by that of the healthy food. This result showed that individuals prefer fish to meat and healthy food to high-calorie foods.

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Whole-Body Microbiota of Sea Cucumber (Apostichopus japonicus) from South Korea for Improved Seafood Management

  • Kim, Tae-Yoon;Lee, Jin-Jae;Kim, Bong-Soo;Choi, Sang Ho
    • Journal of Microbiology and Biotechnology
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    • v.27 no.10
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    • pp.1753-1762
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    • 2017
  • Sea cucumber (Apostichopus japonicus) is a popular seafood source in Asia, including South Korea, and its consumption has recently increased with recognition of its medicinal properties. However, because raw sea cucumber contains various microbes, its ingestion can cause foodborne illness. Therefore, analysis of the microbiota in the whole body of sea cucumber can extend our understanding of foodborne illness caused by microorganisms and help to better manage products. We collected 40 sea cucumbers from four different sites in August and November, which are known as the maximum production areas in Korea. The microbiota was analyzed by an Illumina MiSeq system, and bacterial amounts were quantified by real-time PCR. The diversity and bacterial amounts in sea cucumber were higher in August than in November. Alpha-, Beta-, and Gammaproteobacteria were common dominant classes in all samples. However, the microbiota composition differed according to sampling time and site. Staphylococcus warneri and Propionibacterium acnes were commonly detected potential pathogens in August and November samples, respectively. The effect of experimental Vibrio parahaemolyticus infection on the indigenous microbiota of sea cucumber was analyzed at different temperatures, revealing clear alterations of Psychrobacter and Moraxella; thus, these shifts can be used as indicators for monitoring infection of sea cucumber. Although further studies are needed to clarify and understand the virulence and mechanisms of the identified pathogens of sea cucumber, our study provides a valuable reference for determining the potential of foodborne illness caused by sea cucumber ingestion and to develop monitoring strategies of products using microbiota information.

Improvement on Yield and Functional Properties of Autoclave-Treated Salmon Frame Extracts using Commercial Enzymes (효소 처리에 의한 고온가압 연어 frame 추출물의 수율 및 건강 기능성 개선)

  • Heu, Min-Soo;Ji, Seong-Gil;Koo, Jae-Geun;Kwon, Jae-Seok;Han, Byung-Wook;Kim, Jeong-Gyun;Kim, Hyung-Jun;Kim, Jin-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.6
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    • pp.537-544
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    • 2009
  • This study was conducted to improve yield and functional properties of autoclave-treated salmon frame extracts (SFETA) using commercial enzymes (Alcalase 2.4 L FG, Flavourzyme 500 MG, Neutrase 0.8 L and Protamex 1.5 MG). Yield and angiotensin I converting enzyme (ACE) inhibitory activity of all enzymatic hydrolysates improved compared to those of control (undigested extracts), which were the highest in hydrolysates incubated with Protamex 1.5 MG for 4 hrs (P4-treated hydrolysates) and 2 hrs (P2-treated hydrolysates), respectively. However, antioxidant activities of all enzymatic hydrolysates showed less than 29%. According to the trichloroacetic acid soluble-N, volatile component intensity and sensory evaluation, when compared to control, taste of P4-treated hydrolysates improved, while its fish odor strongly smelt. Therefore, for efficient use of P4-hydrolysates, the fish odor should be improved by Maillard reaction of extracts or pre-treatment of salmon frame.

Improvement in the Fish Odor of Extracts Obtained from Salmon Frame using the Maillard Reaction Treated at High Temperature and Pressure (Maillard 반응에 의한 고온가압처리 연어 frame 추출물의 비린내 개선)

  • JI, Seong-Gil;Koo, Jae-Geun;Kwon, Jae-Seok;Han, Byung-Wook;Kim, Hyung-Jun;Heu, Min-Soo;Kim, Jin-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.4
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    • pp.316-321
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    • 2009
  • This study was conducted to improve the fish odor of extracts obtained from salmon frame. Salmon frame extracts were prepared using four kinds of pretreated salmon frame (salmon frame soaked in soybean milk and fried salmon frame) or containing additives (cystine and xylose-added salmon frame, and methionine and xylose-added salmon frame). Among the extracts prepared in this study, extracts containing cystine and xylose had the highest volatile component intensity and odor sensory score. These suggested that the fish odor of salmon frame extracts can be reduced by adding cystine and xylose before extraction.

Preparation Conditions of Extracts from Salmon Frame using an Autoclave (고온가압에 의한 연어 frame 추출물의 제조조건)

  • JI, Seong-Gil;Koo, Jae-Geun;Kwon, Jae-Seok;Han, Byung-Wook;Kim, Hyung-Jun;Heu, Min-Soo;Kim, Jin-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.4
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    • pp.307-315
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    • 2009
  • This study was conducted to investigate optimal conditions for preparation of extracts from salmon frame using an autoclave. According to the results of various extraction conditions (extraction method, extraction time, volume and pH of extraction solution, and necessity of re-extracting), higher quality extracts could be prepared by adding salmon frame into 3 times (vol/wt) of water to raw material, and then autoclaving for 4 hrs before filtering extracts with cheese cloth. For efficient use as basic materials of liquid or powder Gomtang, however, fish odor of the extracts prepared under optimal condition should be improved.

A Retrospective Study on the Comparison of Outbreaks of Food Poisoning for Food Hygiene in Korea and Japan

  • Lee, Won-Chang;Chung, Choog-Il
    • Journal of Food Hygiene and Safety
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    • v.11 no.4
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    • pp.277-285
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    • 1996
  • Retrospective study on the comparison of outbreaks of food poisoning for food hygiene in Korea and Japan. The average value of morbidity rate by year in Korea during the period of 1971 to 1992 was 2.9 per 100,000 population, and that of Japan was 29.1. The mean value of mortality rates in case of food poisoning by year in Korea was 2.33%, and that of Japan was 0.07%. When compared the rates of morbidity and mortality between Korea and Japan during the same period, the morbidity rates of Japan were much higher than those of Korea (p<0.01). However, mortality rate of patients in Korea were much higher then those of Japan(p<0.01). Resulting from comparative observation of food poisoning by preparing facilities between Korea and Japan. The highest list the places where the outbreaks occurred was home-made foods accounted for 48.8% of the total cases in Korea and that of Japan was restaurants accounted for 33.0%. Causative foods in Korea, the most common incrimination vehicles were seafood, meat and animal products and grain and vegetables, including mushroom. However, in the case of the common incrimination vehicles Japan were unknown and other foods, seafood, vegetables and meat and animal products etc.. Food poisoning of pathogenic substance in Korea were 60.9% of bacterial food poisoning of the total cases showing that Vibrio species, Salmonella spp., Staphylococcus spp., pathogenic E. coli, Clostridium spp. and other spp. were 33.3%, 26.2%, 16.3%, 5.3%, 0.4% and 18.5%, respectively. On the other hand, in Japan, major causes were Vibrio spp. (45.7%), Staphylococcus spp. (23.7%), Salmonella spp. (16.8%), pathogenic E. coli (3.8%), Clostridium spp. (0.2%) and other spp. (9.6%).

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Endoprotease and Exopeptidase Activities in the Hepatopancreas of the Cuttlefish Sepia officinalis, the Squid Todarodes pacificus, and the Octopus Octopus vulgaris Cuvier

  • Kim, Min Ji;Kim, Hyeon Jeong;Kim, Ki Hyun;Heu, Min Soo;Kim, Jin-Soo
    • Fisheries and Aquatic Sciences
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    • v.15 no.3
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    • pp.197-202
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    • 2012
  • This study examined and compared the exopeptidase and endoprotease activities of the hepatopancreas (HP) of cuttlefish, squid, and octopus species. The protein concentration in crude extract (CE) from octopus HP was 3,940 mg/100 g, lower than those in CEs from squid HP (4,157 mg/100 g) and cuttlefish HP (5,940 mg/100 g). With azocasein of pH 6 as a substrate, the total activity in HP CE of octopus was 31,000 U, lower than the values for cuttlefish (57,000 U) and squid (69,000 U). Regardless of sample type, the total activities of the CEs with azocasein as the substrate were higher at pH 6 (31,000-69,000 U) than at pH 9 (19,000-34,000 U). With L-leucine-p-nitroanilide (LeuPNA) of pH 6 as the substrate, the total activity of the HP CE from octopus was 138,000 U, higher than values from both cuttlefish HP (72,000 U) and squid HP (63,000 U). Regardless of sample type, the total activities of the CEs with LeuPNA as the substrate were higher at pH 6 (63,000-138,000 U) than at pH 9 (41,000-122,000 U). With LeuPNA as the substrate, the total activities of the CEs from octopus HP and cuttlefish HP were higher at pH 6 than at pH 9. However, there was no difference in total activity between pH 6 and 9 for squid HP CE with LeuPNA as the substrate. These results suggest that the octopus HP is superior to the cuttlefish HP and squid HP as a potential resource for extracting exopeptidases. Exopeptidases from octopus HP have potential industrial applications and their use might aid in reducing pollution related to the octopus industry.

Food Functionality of Collagenous Protein Fractions Recovered from Fish Roe by Alkaline Solubilization (어류 알로부터 알칼리 가용화공정을 통해 회수한 Collagenous Protein 획분의 식품 기능특성)

  • Yoon, In Seong;Kim, Jin-Soo;Heu, Min Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.51 no.4
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    • pp.351-361
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    • 2018
  • This study investigated the potential of collagenous protein fractions (CPFs) as functional foods. The specific CPFs studied were recovered from the roe of bastard halibut (BH), Paralichthys olivaceus; skipjack tuna (ST), Katsuwonus pelamis; and yellowfin tuna (YT), Thunnus albacares through the alkaline solubilization process at pH 11 and 12. The buffer capacity, water-holding capacity and solubility of CPFs with pH-shift treatment were significantly better at alkaline pH (10-12) than at acidic pH (2.0). At pH-shift treatment (pH 2 and 12), the foaming capacities of CPFs from ST and YT were improved compared to those of controls, but they were unstable compared to BH CPFs. The emulsifying activity index (EAI, $m^2/g$ protein) of CPFs (controls) was 16.0-21.1 for BH, 20.1-23.9 for ST and 9.3-13.7 for YT (P<0.05). CPFs adjusted to pH 12 showed improved EAI and YT CPFs showed significantly greater emulsifying ability than those from BH and ST. CPFs recovered from fish roe are not only protein sources but also have a wide range of food functionalities, confirming the high availability of fish sausage and surimi-based products as protein or reinforcing materials for functional foods and alternative raw materials.