• Title, Summary, Keyword: Sargassum horneri

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Adsorption Characteristics of the Heavy Metals, Cd(II) and Pb(II) Ions, on the Si-immobilized Sargassum horneri (실리카고정 괭생이모자반에 대한 중금속 Cd(II), Pb(II) 이온의 흡착 특성)

  • Park, Kwang-Ha;Park, Mi-A;Kim, Young-Ha
    • Analytical Science and Technology
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    • v.13 no.3
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    • pp.368-377
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    • 2000
  • Si-immobilized Sargassum horneri was used to study the adsorption characteristics along with maximum adsorption conditions of heavy metal ions, Cd(II) and Ph(II) on the Si-immobilized Sargassum horneri. More amount of Cd(II) and Pb(II) ions on the Si-immobilized Sargassum horneri than Sargassum horneri were adsorbed. And Pb(II) ions were more adsorbed in all algae than Cd(II) ions more effectively in alkaline than in acidity. Recovery ratios of Cd(II) and Pb(II) ions on the Sargassum horneri were 58.0-62.6%, 61.2-64.4% respectively, Si-immobilized Sargassum horneri 56.8-92.7%, 37.8-47.9%. Recovery ratio of Cd(II) ion was higher on the Si-immobilized Sargassum horneri but it of Pb(II) ion was lower on the Si-immobilized Sargassum horneri.

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Transplantation of Young Fronds of Sargassum horneri for Construction of Seaweed Beds (해중림 조성을 위한 괭생이모자반(Sargassum horneri) 유체의 이식)

  • CHOI Chang Geun;KIM Hyung Geun;SOHN Chul Hyun
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.5
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    • pp.469-473
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    • 2003
  • Transplantation of Sargassum horneri to natural substrate using the rope seeding method was undertaken. Seeding of S. horneri was grown on net in an indoor tank up to 0.2-0.3 cm in frond length for 2 months, and then transplanted to an architecture tile $(10\times10\;cm)$ with underwater glue and an iron pipe. After two months, number of S. horneri on the tile decreased because of grazing by herbivores. However, S. horneri on the iron pipe grew up to 0.5-2.0 cm in frond length. After 7 months, they rapidly grew up to a frond length of 11.0-203.0 cm with a mean frond length of 122.6 cm. S. horneri grew up to a maximum frond length of 313.0 cm, and mean frond length of 228.0 cm, after 10 months. The artificial S. hornevi beds can be used to clean the seawater and also be utilized as a source of marine biomass as well as for supplying habitat, shelter and spawning beds for fish and invertebrates.

Structural Characteristics of Benthic Algal Community in the Subtidal Zone of Yeongil Inner and Outer Bay (영일만 내,외해역에서 조하대 해조군집 구조의 특성)

  • Yu,Jong-Su
    • ALGAE
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    • v.18 no.4
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    • pp.365-369
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    • 2003
  • Algal flora and community structure of benthic marine algae in the subtidal zone, Yeongil Bay area were studied. The number of algal species in the quadrats were identified totally 78: 2 Cyanophyta, 10 Chlorophyta, 19 Phaeophyta, and 47 Rhodophyta. The dominant species based on biomass were Sargassum hornerii, Undaria pinnatifida, and Sargassum thunbergii. Vertical distribution was clear by the representative algae such as, Undaria pinnatifida, Sargassum thunbergii, Sargassum horneri, Corallina spp. in the upper subtidal zone, Undaria pinnatifida, Sargassum horneri, Caulerpa okamurae in the middle zone, and Dictyopteris divaricata in the lower zone.

Production of Bioethanol via Sargassum horneri Fermentation (괭생이모자반에서 바이오에탄올 발효 생산)

  • Jeong, Dong-yun;Jeong, Da-In;Jeong, Seung-Mi;Kim, Yong-Jin
    • Journal of the Korean Society of Urban Environment
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    • v.17 no.1
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    • pp.19-24
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    • 2017
  • Recently, lots of Sargassum horneri were flowed in Jeju and south coast of South Korea from China by oceanic currents. The massive influx of S. horneri do not only damage human beings at sea, but also pile up on the coasts, consequently emitting an offensive odor by decay. In this study, as a result, the use as a biomass for bioethanol production of the collected S. horneri was examined. When comparing the bioethanol productivity of the S. horneri and other brown algae, a similar amount of reducing sugar was extracted from the S. horneri, while bioethanol was lower.

Effects of Temperature, Photon Irradiance, and Photoperiod on the Growth of Embryos of Sargassum horneri in Laboratory Culture (괭생이모자반(Sargassum horneri) 유배의 생장에 미치는 온도, 광량, 광주기의 영향)

  • Kim, Nam-Gil
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.48 no.1
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    • pp.76-81
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    • 2015
  • The effects of temperature, photon irradiance, and photoperiod on the growth of Sargassum horneri embryos were examined for female plants collected at Chokpo in Tongyeoung, Gyeongnam Prefecture, Korea on 27 December 2011. Mature plant receptacles were detached, and fertilized eggs were cultured in the laboratory at temperatures of $5-25^{\circ}C$ with photon irradiances of $10-80{\mu}mol\;m^{-2}s^{-1}$ under 14L:10D and 10L:14D photoperiods. Germination and embryo growth were rapid at $20-25^{\circ}C$ and $40{\mu}mol\;m^{-2}s^{-1}$ under 14L:10D. The number of rhizoids in the germinated young thalli was high at high photon irradiances ($40-80{\mu}mol\;m^{-2}s^{-1}$) and $15-20^{\circ}C$. At $20^{\circ}C$ and 14L:10D, vigorous growth of main and lateral branches was observed; however, at $5^{\circ}C$ under both photoperiods, plant growth decreased markedly. In the present study, S. horneri grew well at high temperatures ($20-25^{\circ}C$) and high photon irradiances ($40-80{\mu}mol\;m^{-2}s^{-1}$) with a 14L:10D photoperiod.

Biosorption and Desorption of Pb by using Sargassum horneri (괭생이모자반, Sargassum horneri를 이용한 Pb 흡착 및 탈착)

  • SUH Kuen-Hack;AHN Kab-Hwan;KIM Byong-Jin;CHO Jin-Koo;JIN Hyung-Joo;HONH Yong-Ki
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.32 no.3
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    • pp.333-337
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    • 1999
  • Biosorption of Pb to Sargassum horneri was evaluated. An adsorption equilibrium was reached in about 15 min. for Pb and Pb uptake was 185.5 mg Pb/g biomass. When Ca and Mg concentration increases in Pb solution, Pb was selectively adsorbed. The Pb adsorbed by S. horneri could be recovered by desorption process, and the desorption efficiency of Pb by 0.1 M HCl, 0.1 M $HNO_3$, and 0.1 M EDTA was above $95\%$, whereas the elution by 0.1 M NaOH was less efficient in the desorption of Pb. S. horneri was reused 6 cycle repeatedly after adsorption/desorption and the sum of uptake was 636.6 mg Pb/g biomass.

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Epibionts associated with floating Sargassum horneri in the Korea Strait

  • Kim, Hye Mi;Jo, Jihoon;Park, Chungoo;Choi, Byoung-Ju;Lee, Hyun-Gwan;Kim, Kwang Young
    • ALGAE
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    • v.34 no.4
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    • pp.303-313
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    • 2019
  • Floating seaweed rafts are a surface-pelagic habitat that serve as substrates for benthic flora and fauna. Since 2008, Sargassum horneri clumps have periodically invaded the Korea Strait. In this study, the polymerase chain reaction-free small-organelles enriched metagenomics method was adopted to identify the species of epibiotic eukaryotes present in floating S. horneri fronds. A total of 185 species were identified, of which about 63% were previously undetected or unreported in Korean waters. The rafts harbored a diverse assemblage of eukaryotic species, including 39 Alveolata, 4 Archaeplastida, 95 Opisthokonts, 4 Rhizaria, and 43 Stramenopiles. Of these 185 taxa, 48 species were found at both Sargassum rafts collection stations and included 24 Stramenopiles, 17 Alveolata, and 7 Opisthokonts. Among these, the highest proportion (50%) of species was photo-autotrophic in basic trophic modes, while the proportion of phagotrophic, osmo- or saprotrophic, and parasitic modes were 43.8%, 4.2%, and 2.1%, respectively. This study demonstrates the contribution of floating Sargassum rafts as dispersal vectors that facilitate the spread of alien species.

Inhibition of MMP-2 and MMP-9 activities by solvent-partitioned Sargassum horneri extracts

  • Karadeniz, Fatih;Lee, Seul-Gi;Oh, Jung Hwan;Kim, Jung-Ae;Kong, Chang-Suk
    • Fisheries and aquatic sciences
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    • v.21 no.6
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    • pp.16.1-16.7
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    • 2018
  • Background: Matrix metalloproteinases (MMPs) are linked with several complications such as metastasis of cancer progression, oxidative stress, and hepatic fibrosis. Brown seaweeds are being extensively studied for their bioactive molecule content against cancer progression. In this context, Sargassum horneri was reported to possess various bioactivities including antiviral, antimicrobial, and anti-inflammatory partly due to its phenolic compound content. Methods: In this study, potential of S. horneri was evaluated through anti-MMP effect in HT1080 fibrosarcoma cells. S. horneri crude extract was fractionated with organic solvents, namely, water ($H_2O$), n-buthanol (n-BuOH), 85% aqueous methanol (85% aq. MeOH), and n-hexane. The non-toxicity of fraction samples (Sargassum horneri solvent-partitioned extracts (SHEs)) was confirmed by cell-viability assay. SHEs were tested for their ability to inhibit MMP enzymatic activity through gelatin digestion evaluation and cell migration assay. Expressions of MMP-2 and MMP-9 and tissue inhibitors of MMP (TIMPs) were evaluated by reverse transcription and Western blotting. Results: All fractions inhibited the enzymatic activities of MMP-2 and MMP-9 according to gelatin zymography. Except $H_2O$ fraction, fractions hindered the cell migration significantly. All tested fractions suppressed both mRNA and protein levels of MMP-2, MMP-9, TIMP-1, and TIMP-2. Conclusion: Overall, current results suggested that S. horneri has potential to be a good source for anti-MMP agents, and further investigations are underway for better understanding of the action mechanism and isolation and elucidation of the bioactive molecules.

Biosorption of $Pb^{2+}$ and $Cr^{3+}$ by using Sargassum hornei (Sargassum horneri를 이용한 $Pb^{2+}$$Cr^{3+}$ 생체흡착)

  • 서근학;안갑환;조문철
    • Journal of Environmental Science International
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    • v.8 no.3
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    • pp.387-391
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    • 1999
  • $Pb^{2+}$ and $Cr^{3+}$ uptake capacity by Sargassum horneri was 185.5 mg $Pb^{2+}$/g biomass and 102.6 mg $Cr^{3+}$/g biomass, respectively. An adsorption equilibria were reached within about 0.5 hr for $Pb^{2+}$ and 1 hr for $Cr^{3+}$. The adsorption parameters for $Pb^{2+}$ and $Cr^{3+}$ were determined according to Langmuir and Freundlich model. With an increase in pH values of 2 to 5, $Pb^{2+}$ uptake was increased, however $Cr^{3+}$ uptake jwas constant. The selectivity of mixture solution showed the uptake order of $Pb^{2+}$>$Cu^{2+}$>$Cr^{3+}$>$Cd^{2+}$. $Pb^{2+}$ and $Cr^{3+}$ adsorbed by S. horneri could be recovered from 0.1M HCl, 0.1M ${HNO}_3$ and 0.1M EDTA by desorption process, and the efficiency of $Pb^{2+}$ desorption was above 98%, whereas the efficiency of $Cr^{3+}$ desorption was below 34%.

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Community Structure of Benthic Marine Algae at Daejin and Jukbyeon on the Mid-East Coast of Korea (동해 중부 대진과 죽변 연안의 저서 해조류 군집구조)

  • Shin, Jae-Deok;Ahn, Jung-Kwan;Kim, Young-Hwan;Lee, Sung-Bok;Kim, Jeong-Ha;Chung, Ik-Kyo
    • ALGAE
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    • v.23 no.3
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    • pp.231-240
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    • 2008
  • The species composition and variation of benthic marine algae at Daejin and Jukbyeon on the mid-east coast of Korea were investigated seasonally from August 2006 to April 2007. As a result, the total of 85 species, including 8 chlorophytes, 26 phaeophytes, 50 rhodophytes and 1 sea grass were identified. 52 species were found at Daejin and 74 species at Jukbyeon. Dominant species in importance value were Corallina pilulifera, Chondrus ocellatus, melobesioidean algae, Sargassum horneri, Sargassum yezoense and Phyllospadix japonica at Daejin, and Corallina pilulifera, melobesioidean algae, Phyllospadix japonica, Acrosorium polyneurum, Sargassum siliquastrum and Hizikia fusiformis at Jukbyeon, respectively. The vertical distribution of algae were characterized by Corallina pilulifera, Hizikia fusiformis, Sargassum spp. (S. siliquastrum, S. yezoense) and Symphyocladia latiuscula at intertidal zone, Sargassum spp. (S. horneri, S. serratifolium, S. yezoense), melobesioidean algae, Phyllospadix japonica and Corallina pilulifera at 1 m depth, melobesioidean algae, Phyllospadix japonica and Sargassum spp. (S. horneri, S. yezoense) at 5 m depth and melobesioidean algae, Phyllospadix japonica and Sargassum spp. (S. horneri, S. micracanthum, S. yezoense) at 10 m depth.