• 한국수산과학회지
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• 제41권5호
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• pp.337-342
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• 2008

Eight quality standards of the brown seaweed, Undaria pinnatifida were designed and evaluated with dry products collected from aquacultured and wild areas. Contents of n-3 fatty acids (stearidonic acid and eicosapentaenoic acid), anti-edema activity, and total carbohydrate were measured as functional criteria. Total bacteria and molds were counted for safety conditions. Amounts of a brown pigment fucoxanthin, debris, and moisture were measured to evaluate the visible status of the products. When the seaweeds were tested in 1 g dry weight basis, they showed n-3 fatty acids in the range of approximately 0.2-2.8 mg, total carbohydrate of 0.39-0.71 g, total bacteria of $10^{4-6}$ cells, mold of $10^2$ cells, fucoxanthin of 0.4-1.5 mg, and debris of 10-24 mg. Anti-edema activity was 0.03-0.47 AU at 40 mg/mL extract. Moisture content was 11.4-12.6%.

• 한국해양학회지
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• 제10권1호
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• pp.17-24
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• 1975

In order to clarify the accumulation of radioactive materials in marine organisms of Korea, the present investigation is carried out with 54 samples of edible seaweeds collected from eight sampling sites along the coast of Korea during September, 1973 and April, 1974. In this paper, ash contents, gross alpha activities and gross beta activities are detected. The ash content is 7.53- 15.95% in the species investigated. Among the algal phyla it is about 13.13% in green algae, 12.77% in brown algae, and 10.77% in red algae on an average. On the other hand, gross alpha activities fluctuate from 180.0 pCi/Kg to 1082.6 pCi /Kg-fresh material experimented, and are 530.72 pCi/Kg on an average. They increase from green to red and brown algae, in turn. The activities in a single species collected at the same season increse from eastern to western and southern coasts of Korea, in turn. Gross beta activities, however, fluctuate from 2.40 nCi/Kg to 22.14 nCi/Kg-fresh material experimented, and 9.03 nCi/Kg on an average. They increase also from green to red nd brown algae, in turn. The gross beta activities are specially higher in Sargassum thunbergii, 22.14 nCi/Kg It is expected that this plant could be an indicator to detect the activities in the marine algae along the coast of Korea.

• Nutrition Research and Practice
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• 제14권6호
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• pp.580-592
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• 2020

BACKGROUND/OBJECTIVES: The present study aimed to further investigate the potential health beneficial effects of long-term seaweed supplementation on lipid metabolism and hepatic functions in DIO mice. MATERIALS/METHODS: Four brown seaweeds (Undaria pinnatifida [UP], Laminaria japonica [LJ], Sargassum fulvellum [SF], or Hizikia fusiforme [HF]) were added to a high fat diet (HFD) at a 5% ratio and supplemented to C57BL/6N mice for 16 weeks. Triglycerides (TGs) and total cholesterol (TC) in the liver, feces, and plasma were measured. Fecal bile acid (BA) levels in feces were monitored. Hepatic insulin signaling- and lipogenesis-related proteins were evaluated by Western blot analysis. RESULTS: Fasting blood glucose levels were significantly reduced in the LJ, SF, and HF groups compared to the HFD group by the end of 16-week feeding period. Plasma TG levels and hepatic lipid accumulation were significantly reduced in all 4 seaweed supplemented groups, whereas plasma TC levels were only suppressed in the UP and HF groups compared to the HFD group. Fecal BA levels were significantly elevated by UP, LJ, and SF supplementation compared to HFD feeding only. Lastly, regarding hepatic insulin signaling-related proteins, phosphorylation of 5'-AMP-activated protein kinase was significantly up-regulated by all 4 types of seaweed, whereas phosphorylation of protein kinase B was up-regulated only in the SF and HF groups. Lipogenesis-related proteins in the liver were effectively down-regulated by HF supplementation in DIO mice. CONCLUSIONS: Brown seaweed consumption showed hypotriglyceridemic effects in the prolonged DIO mouse model. Specifically, combinatory regulation of BA excretion and lipogenesis-related proteins in the liver by seaweed supplementation contributed to the reduction of plasma and hepatic TG levels, which inhibited hyperglycemia in DIO mice. Thus, the discrepant and species-specific functions of brown seaweeds provide novel insights for the selection of future targets for therapeutic agents.

• 한국수산과학회지
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• 제50권3호
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• pp.319-325
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• 2017

Marine algal flora and community structures were examined seasonally at three sites around the Shingori Nuclear Power Plant, Korea from February to November 2016. A total of 76 species were identified, including 9 green, 14 brown and 53 red algae. The greatest number of species occurred at Daesongri (51 species) followed by Sinamri (43 species) and at the discharge area (38 species) during the study period. Of the 76 seaweeds, 59 annuals and 17 warm tolerant species were recorded. Annual average biomass in dry weight varied from $168.02g/m^2$ at the discharge area to $222.53g/m^2$ at Sinamri. The coarsely branched form was the dominant functional form of seaweeds at the three sites. Seaweed community structures at the discharge site were distinguishable by decreasing species richness, biomass, species diversity index, richness index, and evenness index. The ratio of warm tolerance species and the dominance index values were remarkably higher at the discharge than those at the other sites.

• Fisheries and Aquatic Sciences
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• 제10권3호
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• pp.127-132
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• 2007

The anti-inflammatory activities of dichloromethane, ethanol, and boiling water extracts of the brown seaweeds Undaria pinnatifida (Harvey) Suringar and Laminaria japonica Areschoug were examined. Ethanol extracts (0.4 mg/ear) of U. pinnatifida inhibited inflammatory symptoms in mouse ear edema by 95.3%, and dichloromethane extract inhibited erythema by 65.5%. Dichloromethane and ethanol extracts (4 g/kg bw) of L. japonica demonstrated potent antipyretic activity. Activities of the seaweed extracts were similar to those of the commonly used drugs indomethacin and acetyl salicylic acid. No acute toxicity was observed after p.o. administration of each extract (5 g/kg bw). These results were in agreement with the claims of the health care industry and indigenous medicine that the above seaweeds can be used as an effective remedy for inflammation-related symptoms.

• Food Science and Biotechnology
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• 제14권6호
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• pp.798-802
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• 2005

Crude extracts of thirty seaweeds collected in Korea were obtained using 50% ethanol, and total phenolic contents and antioxidant activities were compared. Two brown algae, Ecklonia cava (E. cava) and Sargassum siliquastrum (S. siliquastrum), showing high antioxidant activity based on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and superoxide anion radical scavenging activity were further investigated for their inhibitory effects on tyrosinase activity. The E. cava extract had the highest total phenolic content among the seaweeds extracts. Total phenolic contents were strongly correlated with antioxidant activity in the thirty seaweed extracts ($R^2\;=\;0.9169$). The E. cava and S. siliquastrum extracts exhibited higher inhibition to tyrosinase activity than butylated hydroxytoluene (BHT) and epigallocatechin gallate (EGCG).

• ALGAE
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• 제23권4호
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• pp.301-310
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• 2008

The marine benthic algal flora and biomass of Chuja Island, southern coast of Korea, was investigated. The collections of intertidal marine algae were made at two sites, Yecho of Hachujado and Hupo of Sangchujado, from October 2006 to July 2007. A total of 162 species, including 15 green, 47 brown and 100 red algae, were identified in this study. The occurrence of species according to season was abundant during spring to summer and less in autumn. The vertical distribution of intertidal zone in Chujado was characterized by Gloiopeltis spp., Myelophycus simplex, Ishige okamurae, Chondrus ocellatus, Grateloupia elliptica, Hizikia fusiformis and Sargassum spp. The average biomass of macroalgae was measured as 400 g wet wt m$^{-2}$. The dominant species based on the biomass were Sargassum yezoense, S. coreanum and Hizikia fusiformis. ESG II (ecological state group) as an opportunistic species, including sheet form, filamentous form, and coarsely branched form, occurred 85.8% in the intertidal seaweeds. These results provide a baseline for future monitoring studies in the Chuja Island.

• Fisheries and Aquatic Sciences
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• 제14권4호
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• pp.389-397
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• 2011

The benthic algal community structures of the seaweed biomass, vertical distribution of dominant seaweeds, and species composition were examined on the rocky shores of Ongdo, Jusamdo, and Woejodo Islands, Korea, in August 2006. A total of 68 seaweeds were identified, comprising 5 green, 11 brown, and 52 red algae from the three study sites. The number of species at Ongdo (32 species) was less than that at Jusamdo (45 species) and Woejodo (44 species). Jusamdo exhibited the maximum seaweed biomass (73.99 g dry $wt/m^2$), while the minimum value was found at Woejodo (36.90 g dry $wt/m^2$). On the three islands, coarsely branched forms were the most dominant functional group in terms of species number and biomass among benthic algal species. The dominant species were Gelidium amansii, Chondrus ocellatus, and Chrysymenia wrightii at Ongdo, Sargasum thunbergii, Ulva pertusa, and Sargassum fusiformis at Jusamdo, and U. pertusa, Undaria pinnatifida, and Corallina pilulifera at Woejodo. Perennial seaweeds were abundant at Ongdo (G. amansii and C. ocellatus) and Jusamdo (S. thunbergii and S. fusiformis), whereas the sheet form of U. pertusa was relatively abundant at Woejodo Island.

• 한국해양바이오학회지
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• 제2권3호
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• pp.133-141
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• 2007

국내 해조류 자원의 이용성 증대를 위해서 해조류의 기능성, 유산균 생육 특성, 가공식품에의 이용, 생분해성 포장재의 소재, 그리고 부산물을 이용한 동물사료화 및 퇴비화 가능성의 연구 보문을 조사하였다. 기능성물질 연구에서는 유용색소 (Fucoxanthin)의 추출과 부위별 함량 및 분광학적인 특성이 있으며, 해조류로부터 alginate의 함량 조사와 최적추출조건 확립에 대한 연구를 수행하여 AASA (Acid alkali soluble alginate) 추출방법에서 3% $Na_2CO_3$ 농도와, $H_2SO_4$의 농도 0.4 N에서 가장 높은 수율을 얻었다. 톳으로부터 산알칼리 (AASA) 방법으로 추출한 알긴산에 인위적으로 sulfate를 흡착 Lactobacillus acidophilus를 접종한 후 배양하면서 유산균의 성장에 대한 영향을 살펴 본 결과 모든 농도에서 이들 배지에 S-alginate를 첨가한 것이 유산균의 성장을 증가시켰다. 미역귀 추출물로 잼을 제조하였고, 김, 미역, 다시마의 물 추출물로 물성이 우수하고 관능성적도 양호한 젤리를 제조하였다. 해조류 젤리를 상품화하는데 있어서 해조류가 갖는 해조취와 젤리색소의 안정화가 상품화의 요소로 대두되어 이를 개선할 방법도 제시되었다. 해조 간장과 된장 및 두부에서는 다당류나 무기질 등 영양적인 기능성과 관능적 기호성을 향상시킬 수 있었다. 알긴산 필름의 물성 증진을 위하여 $CaCl_2$를 필름용액에 직접 첨가 또는 필름을 $CaCl_2$용액에 침지하는 두 가지 방법에서 수분 저항성이 강한 필름을 제조할 수 있었다. 미이용 해조분말이나 해조가공 부산물로 얻어지는 해조분말을 이용하여 새로운 생분해성 포장소재로 사용할 수 있는 가능성이 있다. 해조류의 영양성분 및 아미노산 함량을 분석한 결과 사료첨가제로서 충분한 가치가 있었으나 다량의 염분 함량으로 인하여 그 가치가 평가 절하되었다. 따라서 해조류의 사료적 가치를 증진시키기 위하여 발효처리를 하였으며, 그 결과 기능성 영양소 (불포화 지방산)가 증가되는 효과가 있었다.

• 한국식품과학회지
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• 제31권6호
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• pp.1477-1483
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• 1999

양파의 향기성분을 보존 또는 제거할 목적으로 양파냄새를 masking하거나 제거하는 물질을 양파즙에 처리하여 관능검사를 실시하였고, pyruvate와 thiosulfinate를 측정하였으며 Solid Phase Micro Extraction(SPME)/GC법을 이용하여 휘발성 향기성분의 변화를 조사하였다. 생양파즙의 주요 향기성분은 dipropyl tetrasulfide, 1-propenyl propyl trisulfide, methyl propyl trisulfide, dipropyl trisulfide 등이었다. 다시마, 미역, 김, 규조토를 첨가한 양파즙의 휘발성 향기성분은 대조군과 비교하였을 때 모든 향기성분이 다소 감소하는 경향이었으나 활성탄과 ${\beta}-cyclodextrin$ 첨가군은 거의 모든 향기성분이 제거되었다. 여러 가지 첨가물의 농도를 달리하여 양파즙에 첨가하여 관능검사를 실시한 결과 양파 냄새는 감소하였으며 p<0.05 수준에서 유의적으로 차이가 나타났다. 해조류를 첨가한 군의 pyruvate와 thiosulfinate 함량은 대조군과 차이가 없었으나 활성탄을 첨가한 양파즙의 경우, 그 함량이 크게 감소하였다. 이상의 결과, 다시마, 미역, 김 등의 해조류 처리군은 양파의 향기성분과 매운맛 성분을 보존하면서 관능적으로 양파냄새를 masking하는 효과를 나타내었고, ${\beta}-cyclodextrin$과 활성탄은 양파에 존재하는 많은 휘발성 향기성분과 복합물을 형성하거나 홉착하여 양파냄새를 제거한 것으로 사료되어 진다.