• Fisheries and Aquatic Sciences
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• 제12권1호
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• pp.29-34
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• 2009

Fifty seven species of common seaweed from the coast of Korea were screened for antifungal activity against Malassezia species. Seaweeds as a source of bioactive compounds are able to produce a great variety of secondary metabolites with different activities. There are numerous reports on the biological activities of seaweeds against human pathogens, fungi, and yeasts, but only few contain data regarding inhibitory effects against Malassezia sp., a major cause of dandruff and seborrheic dermatitis. To help address this paucity of information, this work was carried out to examine the antifungal effects of seaweed extracts against M. furfur and M. restricta. Of the fifty seven species of marine algae screened for their potential antifungal activity, only 17 species (29.8%) exhibited inhibitory activity. In agar disc diffusion method, the ether extracts of Corallina pilulifera, Enteromorpha linza, Laminaria japonica, Symphyocladia latiuscula and Ulva sp. showed strong antifungal activity. To identify major constituents in seaweed extracts, four selected extracts were analyzed on' a GC-MS equipped with a flame ionization detector, and compared to spectral data from databases WILEY229.LIB and NIST107.LIB. Most constituents in seaweed extracts are fatty acid-related compounds. When we evaluated any acute toxicity, the ether extracts of the selected four species were not toxic in mice. According to these results, it can be suggested that these seaweed extracts are valuable for the development of therapeutic agents in treating dandruff and seborrheic dermatitis. Further investigations to determine its bioactive compound(s) are currently in progress.

• 한국양식학회:학술대회논문집
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• 한국양식학회 2005년도 춘계학술발표대회 논문요약집
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• pp.65-65
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• 2005

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2007년도 제48회 학술심포지움 및 추계국제학술대회
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• pp.53.1-53.1
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• 2007

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• 환경생물
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• 제30권3호
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• pp.193-199
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• 2012

We performed qualitative and quantitative surveys on the distribution of seaweed species and dominant species with their standing crop and temporal variations in Hauido tidal flats in order to understand the role of seaweeds in a coastal wetland ecological system that may be used for conservation and management of coastal wetland ecological system. A total of 9 species were found at 7 stations of the study area; 4 species of Chlorophyta (Ulva compressa, U. prolifera, U. pertusa and Ulothrix flacca), 3 species of Phaeophyta (Ectocarpus arctus, Scytosiphon lomentaria and Myelophycus simplex) and 2 species of Rhodophyta (Gracilaria verrucosa and Caulacanthus okamurae). Major dominant species were U. compressa, U. prolifera and U. pertusa (Chlorophyta), Scytosiphon lomentaria (Phaeophyta) and Gracilaria verrucosa (Rhodophyta). Standing crops of U. compressa and U. prolifera were $2.94{\sim}45.25g{\cdot}dw{\cdot}m^{-2}$ and $6.19{\sim}91.9g{\cdot}dw{\cdot}m^{-2}$, respectively, in spring. Seaweed habitat was characterized by textural differences that the percentage of coarse particles and organic material were a little higher in seaweed flourishing areas than in seaweed barren areas.

• Journal of Microbiology and Biotechnology
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• 제28권3호
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• pp.401-408
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• 2018

The waste seaweed from Gwangalli beach, Busan, Korea was utilized as biomass for ethanol production. Sagassum fulvellum (brown seaweed, Mojaban in Korean name) comprised 72% of the biomass. The optimal hyper thermal acid hydrolysis conditions were obtained as 8% slurry contents, 138 mM sulfuric acid, and $160^{\circ}C$ of treatment temperature for 10 min with a low content of inhibitory compounds. To obtain more monosaccharides, enzymatic saccharification was carried out with Viscozyme L for 48 h. After pretreatment, 34 g/l of monosaccharides were obtained. Pichia stipitis and Pichia angophorae were selected as optimal co-fermentation yeasts to convert all of the monosaccharides in the hydrolysate to ethanol. Co-fermentation was carried out with various inoculum ratios of P. stipitis and P. angophorae. The maximum ethanol concentration of 16.0 g/l was produced using P. stipitis and P. angophorae in a 3:1 inoculum ratio, with an ethanol yield of 0.47 in 72 h. Ethanol fermentation using yeast co-culture may offer an efficient disposal method for waste seaweed while enhancing the utilization of monosaccharides and production of ethanol.

• 환경생물
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• 제19권2호
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• pp.107-112
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• 2001

조직센서는 극 미량의 Na+채널 차단 물질을 측정하기 위해 개발된 고감도 측정 장치로 해조류 내 $Na^+$ 채널 차단 생리활성물질의 양을 측정하기에 적합하였다. 본 연구는 해조류 내 $Na^+$ 채널 차단 생리활성물질의 존재를 학인 함으로써 해조류를 이용한 신성분 개발의 기초자료를 확보할 목적으로 수행되었다. 분석에 사용된 해조류는 총 92종으로 녹조류 13종, 갈조류 42종, 홍조류 37종으로, 주요 해조류 내 $Na^+$ 채널 차단 생리활성물질은 대체로 수온이 낮은 시기에 더 높은 값을 나타내었다. 이 결과로 볼 때 종특성과 환경이 생리활성물질의 농도에 영향을 주는 것으로 생각되고, 각 종에 대한 생활사 변화와 환경특성에 대한 상관성 연구가 필요한 것을 나타났다.

• 한국산업융합학회 논문집
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• 제23권2_2호
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• pp.351-359
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• 2020

The algae biomass is considered as one of the potential sources of ocean renewable energy because it can be easily mass-produced with abundant sunshine in the vast ocean space. However, the practical use of the biomass has been hindered by the lack of efficient and cost-effective harvesting and maintenance system so far. The algae biomass aquaculture systems are installed in far offshore locations in much larger scales compared to the conventional aquaculture systems so that the automatic seaweed planting and harvesting system needs to operate in heavy sea conditions in far offshore location. In this research, we develop a concept design of a mega-scaled aquaculture system and an automatic seaweed planting and harvesting system, which can operate in heavy seas and mass-produce the algae biomass.

• 한국식생활문화학회지
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• 제23권4호
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• pp.462-468
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• 2008

In this study, we assessed college students' consumption values with regard to a seaweed functional food, and compared differences between the respondents' purchasing intentions and their educational levels. A self-administered questionnaire was designed and distributed to college students in Daegu/Kyungbook province. A total of 288 questionnaires were collected, and the total response rate was 96.0%. The results demonstrated that purchasing intention influenced all five consumption values. The high purchasing intention (HPI) group evidenced greater functional value, social value, emotional value, conditional value, and epistemic value than was observed in the low purchasing intention (LPI) group. However, individuals' educational levels, as related to food, influenced only the functional value and epistemic value. These results demonstrate that college students' consumption value in terms of seaweed functional foods is affected by purchasing intentions and educational experience.

• 한국수산과학회지
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• 제45권3호
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• pp.262-270
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• 2012

Seaweeds provide habitats in which marine animals can spawn and develop, and serve as a food supply for algaegrazing species such as sea urchins and abalone. Recently, seaweed species have disappeared from coastal ecosystems, leaving barren ground, defined as habitats that have lost their algae forests and where coralline algae containing calcium carbonate components have become encrusted on rocks. The biological causes of barren ground include grazing by herbivores and excessive seaweed harvest. The environmental harm caused by the spread of barren ground includes accelerated eutrophication following the reduction in seaweed, which plays an important role in oceanic purification. In the present study, we identified the relationships between various seaweed species and the occurrence of barren ground. Subtidal benthic macroalgal flora and community structure were observed seasonally on barren ground along vertical transects of rocky shores of Bihwa, Samchuck, and the east coast of Korea from February to November 2006. Fifty-eight seaweed species were identified, including 7 green, 15 brown, and 36 red algae species. There were between 6 and 28 species among seasons. Over the whole study period, average seaweed biomass (g wet wt $m^{-2}$) was 241.90 g, with a seasonal range of 25.26 to 760.34 g. Seaweed biomass declined with increasing seawater depth and ranged between 91.26 and 422.08 g. The vertical distribution of algae was characterized by Undaria pinnatifida and Sargassum honeri at 5 m, S. honeri and U. pinnatifida at 10 m, and U. pinnatifida and Agarum clathratum at 15 m depth. Seasonal patterns in community indices were not found. Community indices showed different patterns along vertical shoreline gradients; the dominance index increased but the richness, evenness, and diversity indices decreased with seawater depth. Sea urchin density was 8 to 24 individ. $m^{-2}$ in Bihwa. These urchin populations had significantly aggregated spatial patterns and recurrent destructive grazing appeared to be occurring.

• 한국식품조리과학회지
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• 제31권5호
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• pp.605-613
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• 2015

본 연구는 소비자의 특성에 따른 해조류 소비 실태를 조사하고자 서울, 대전, 광주, 부산, 여수, 속초 등 6개 도시에 거주하는 총 1,218명을 대상으로 자기기입식으로 설문조사를 실시하였고 회수된 설문지는 SAS 통계 패키지를 이용하여 분석하였으며 그 결과는 다음과 같다. 조사대상자의 47.2%가 해조류를 좋아한다고 답했고, 섭취이유는 건강, 맛 순이었고, 싫어하는 이유는 냄새, 질감, 맛 순이었다. 계절에 상관없이 섭취하는 경우가 가장 많았다. 해조류 이용 장소는 가정, 음식점 순으로 많았고, 조리 이용형태는 국, 쌈, 무침 순으로 많았다. 향후 해조류 구매 의도는 전체의 90.6%가 현재와 유사하거나 더 증가할 것이라고 답했다. 또한 해조류 가공식품 중 가장 많이 구입하는 형태는 음료였고, 해조류 품질 판별법을 잘 안다고 답한 경우는 전체의 5.0%였으며, 식품영양정보는 텔레비전과 라디오(26.5%), 부모님이나 어른(21.2%)에게 얻는다는 응답이 높았다. 그리고 지역별 해조류의 기호는 속초가 가장 높았고, 광주가 가장 낮았다. 향후 해조류의 소비를 더욱 증가시키기 위해서 소비자의 특성을 고려한 해조류 음식 및 가공제품의 개발과 홍보가 필요하다고 생각된다.