• ALGAE
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• v.21 no.4
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• pp.393-405
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• 2006

Eight species of Sargassum subgenus Bactrophycus section Halochloa and Repentia were collected from the coasts of Korea: Sargassum coreanum J. Agardh, Sargassum sagamianum Yendo, Sargassum micracanthum (Kützing) Endlicher, Sargassum macrocarpum C. Agardh, Sargassum autumnale Yoshida, Sargassum siliquastrum (Mertens ex Turner) C. Agardh, Sargassum serratifolium (C. Agardh) C. Agardh, Sargassum yezoense (Yamada) Yoshida et Konno. These species were investigated on morphological variations and geographical distributions in Korea. The valuable taxonomic characters between similar species of these section were discussed with special reference to types of holdfasts, shape of main branch, leaves and vesicles.

• Journal of Marine Bioscience and Biotechnology
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• v.8 no.1
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• pp.30-38
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• 2016

The objective of this study was to investigate the useful components and potential antioxidant activities of 30 marine algae, collected from Jeju Island in Korea. The contents of bioacitve substance of extracts from marine algae, such total polyphenol and carbohydrate, were determined. The extract of Distromium decumbens had the highest amount of total polyphenol content (21.27%), and that of Gracilaria incurvata Okamura had the highest amount of total carbohydrate content (10.18%). The antioxidant activities of extracts obtained from algae were tested through the evaluation of DPPH radical and hydroxyl radical scavenging activity. The extracts of Distromium decumbens, Sargassum hemiphyllum (Turner) C.Agardh, Sargassum serratifolium (C. Agardh) C. Agardh and Acrosorium yendoi Yamada were found to have more than 80% DPPH radical scavenging activity and that of Dictyota okamurae (Dawson) $H{\ddot{o}}tning$, Schnetter, et Prud'homme van Reine, Myagropsis myagroides (Martens ex Turner) Fensholt, Sargassum serratifolium (C. Agardh) C. Agardh and Cladophora wrightiana Harvey showed more than 50% hydroxyl radical scavenging activity. These results suggest that algae collected from Jeju Island would be good raw materials for antioxidant.

• Korean Journal of Food Science and Technology
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• v.48 no.3
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• pp.241-246
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• 2016

The object of this study was to develop an alternative way to treat human skin pathogens using marine algae. During this study, we observed that the ethanolic extract of the edible brown algae [Sargassum serratifolium (C. Agardh) C. Agardh] exhibited potential antimicrobial activity against pathogenic commensal bacteria related with acne vulgaris (Propionibacterium acnes, Staphylococcus epidermidis, Staphylococcus aureus and Pseudomonas aeruginosa), and Candida albicans which causes cutaneous candidiasis. Among the solvent-soluble fractions from the ethanolic extract, a hexane-soluble fraction showed the strongest antimicrobial activity against all tested human skin pathogens with MIC values ranging from 32 to $512{\mu}g/mL$. In addition, the hexane fraction exhibited a synergistic antimicrobial activity with commercial antibiotics used in the treatment of acne vulgaris or cutaneous candidiasis. Thus, this study suggests that S. serratifolium extract could be a potential source of natural antimicrobial agents or a pharmaceutical component against human skin pathogens.

• Fisheries and Aquatic Sciences
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• v.15 no.2
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• pp.157-162
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• 2012

To analyze nucleotide sequence encoding internal transcribed spacer (ITS) regions specific to the Laminariaceae family, genomic DNA was isolated from six brown algae species distributed along the east coast of Korea. These included three species from the Laminariaceae family (Agarum clathratum Dumortier, Costaria costata [C. Agardh] Saunders, and Saccharina japonica Areschoug) and two species from the Alariaceae family (Undaria pinnatifida [Harvey] Suringer and Ecklonia cava Kjellman), both in the order Laminariales, and one species from the family Sargassaceae in the order Fucales (Sargassum serratifolium). Based on a sequence analysis of ITS-1 and ITS-2 for A. clathratum, C. costata, and E. cava, oligonucleotides were designed from the regions that showed sequence conservation in Laminariaceae. Following polymerase chain reaction using three sets of primers, amplification of ITS-1 and ITS-2 was detected in reactions using genomic DNA isolated from the species belonging to Laminariaceae, but not from the species belonging to the other families. The results indicate that this method can be used for the detection and identification of Laminariaceae species.