• ALGAE
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• 제23권3호
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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.

• ALGAE
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• 제23권4호
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• pp.327-334
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• 2008

Seaweed biomass was estimated using a nondestructive sampling method in the rocky intertidal and subtidal zone in Daejin on the mid-east coast of Korea from August 2006 to April 2008. Seasonal sampling were done at the depth of 0, 1, 5, 10 m using 50 x 50 cm quadrat. A total of 95 species, including 11 chlorophytes, 26 phaeophytes, 57 rhodophytes and one sea grass were identified. Mean biomass was comprised of 1,292 g wet wt m$^{-2}$ and the biomass values varied seasonally from 904 g to 1,945 g. Dominant species in biomass were Sargassum spp. (S. horneri, S. yezoense), Corallina pilulifera, Phyllospadix japonica, Symphyocladia latiuscula, Hizikia fusiformis, Codium arabicum and Chondrus ocellatus at Daejin. The vertical distribution of algae were characterized by Corallina pilulifera, Symphyocladia latiuscula, Sargassum spp. (S. confusum, S. yezoense), Hizikia fusiformis and Grateloupia elliptica at intertidal zone, Sargassum spp. (S. fulvellum, S. horneri, S. yezoense), Phyllospadix japonica, Codium arabicum, Undaria pinnatifida and Corallina pilulifera at 1 m depth, Sargassum spp. (S. horneri, S. micracanthum, S. yezoense), Phyllospadix japonica, Grateloupia elliptica, Gelidium amansii and Codium arabicum at 5 m depth and Phyllospadix japonica, Codium arabicum, Sargassum spp. (S. horneri, S. micracanthum, S. yezoense) and Undaria pinnatifida at 10 m depth.

• Preventive Nutrition and Food Science
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• 제22권3호
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• pp.166-171
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• 2017

In this study, we investigated whether Sargassum yezoense extract (SYE) could inhibit ${\alpha}-glucosidase$ and ${\alpha}-amylase$ activities, and alleviate postprandial hyperglycemia in streptozotocin (STZ)-induced diabetic mice. Freeze-dried S. yezoense was extracted with 80% ethanol and concentrated for use in this study. The hypoglycemic effect was determined by evaluating the inhibitory activities of SYE against ${\alpha}-glucosidase$ and ${\alpha}-amylase$ as well as its ability to decrease postprandial blood glucose levels. The half-maximal inhibitory concentrations of SYE against ${\alpha}-glucosidase$ and ${\alpha}-amylase$ were $0.078{\pm}0.004$ and $0.212{\pm}0.064mg/mL$, respectively. SYE was a more effective inhibitor of ${\alpha}-glucosidase$ and ${\alpha}-amylase$ activities than the positive control, acarbose. The increase in postprandial blood glucose levels was significantly alleviated in the SYE group compared with that in the control group of STZ-induced diabetic mice. Furthermore, the area under the curves significantly decreased with SYE administration in STZ-induced diabetic mice. These results suggest that SYE is a potent inhibitor of ${\alpha}-glucosidase$ and ${\alpha}-amylase$ activities and alleviates postprandial hyperglycemia caused by dietary carbohydrates.

• 생약학회지
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• 제40권2호
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• pp.150-154
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• 2009

We examined ethanol extracts prepared from the Korean marine algae belonging to the Sargassaceae family for their inhibitory effects on ${\alpha}$-glucosidase activity and free radicals in vitro. Among five marine algae, the extracts of Sargassum yezoense were found to possess strongly ${\alpha}$-glucosidase inhibition and free radicals scavenging activities. Two compounds were isolated via bioactivity guided isolation and tested for their effects on ${\alpha}$-glucosidase, DPPH, $ABTS^{+}$ and $Photochem^{(R)}$ analysis. Their chemical structures were elucidated by spectral analysis and direct comparison with authentic compounds; their structures were identified as sargaquinoic acid (1) and sargahydroquinoic acid (2). The inhibitory effects of compound 1 and 2 ($IC_{50}$ value:14.2 and 12.8 ${\mu}M$, respectively) on ${\alpha}$-glucosidase were more potent that of deoxynojirimycin as a positive control ($IC_{50}$ value:18.0 ${\mu}M$). All compounds displayed antioxidative activity which was measured by DPPH, $ABTS^{+}$ and $Photochem^{(R)}$ apparatus.

• ALGAE
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• 제21권4호
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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.

• 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.

• 생명과학회지
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• 제34권11호
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• pp.818-827
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• 2024

비타민 K는 미량 영양소로 자연상태에서 식물 유래 비타민 K1(PK)과 발효식품 유래 비타민 K2(MKs)가 있으며, 이들은 혈액응고, 면역, 심혈관, 뼈 건강 등의 효능에 대해 보고되었다. 본 연구에서는 식품 원료로 등록된 모자반인 괭생이모자반, 꽈배기모자반, 모자반, 알쏭이모자반, 지충이와 미등록 된 왜모자반 모두 6종의 모자반(Sargassum spp.) 및 L. lactis (KCCM12759P)/L. mesenteroides (KCCM12756P)로 공배양한 유산균 발효물(Sargassum_LlLm) 6종의 PK와 MKs를 확인하고, 그들의 항산화와 항염 효능을 분석하였다. PK와 MK4를 포함하는 6종 모자반 비타민 복합물(Sargassum_cVitK)은 821.4-1,427.13 ng/g 농도 범위로 확인되었으며, 이 중 모자반(Sf, 1,427.13 ng/g)과 왜모자반(Sy, 1,405 98 ng/g)이 가장 높게 측정되었다. 또한, 모자반 발효물(Sargassum_LlLm cVitK)은 PK와 MK4와 MK7이 확인되었고, 이 중 모자반(Sf)에서만 MK9의 생산이 확인되었다. Sargassum_LlLm cVitK는 666.83-1,403.7 ng/g의 농도였으며, 이 중 왜모자반(SyLlLm, 1,403.7 ng/g)과 모자반(SfLlLm, 1,399.69 ng/g)이 가장 많은 것으로 확인되었다. DPPH에 의한 라디칼 소거 활성은 Sargassum_LlLm cVitK(PK, MK4, MK7 또는 MK9)가 Sargassum_cVitK(PK, MK4)보다 조금 높아지는 경향을 보였으며, 특히 꽈배기 모자반 발효물(SsLlLm_cVitK)은 73.94% 높은 활성을 보였다. LPS로 세포 손상이 유도된 Raw 264.7 대식세포의 NO 활성 분석은 각 6종의 모자반(Sargassum_cVitK)과 모자반 발효물(Sargassum_LlLm cVitK) 처리군 모두에서 NO 농도를 감소시켜 항염 효능이 확인되었으며, 특히 모자반 발효물(SfLlLm_cVitK)과 지충이 발효물(StLlLm_cVitK)이 더 효과적인 NO 소거 활성이 있었다. 결론적으로 비타민 K1 함유 모자반과 메나퀴논 생산 기능의 L. lactis와 L. mesenteroides 공배양을 통해 긴 사슬 MK7과 MK9의 생산이 가능하고, 모자반과 그 발효물의 cVitK는 항산화와 항염 효능이 있음을 제시하였다. 이 결과는 향후 해조류와 유산균 바이오 공정에 의한 비타민 K 생산 및 이들의 면역, 심혈관, 및 뼈 건강 등에 관한 효능 연구에 도움이 될 것으로 사료된다.

• 해양환경안전학회지
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• 제21권2호
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• pp.119-129
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• 2015

우리나라 동해안 중부의 축산항 지역에서 2007년 7월부터 2009년 5월까지 계절별로 조간대와 조하대 해조류의 종조성과 군집구조를 조사하였다. 2년에 걸친 조사를 통해 밝혀진 해조류는 총 98종(녹조류 13종, 갈조류 23종, 홍조류 62종)이었고, 조사시기별로는 33~63종의 범위로 나타났다. 이 가운데 녹조류 2종(구멍갈파래, 떡청각), 갈조류 3종(참그물바탕말, 톳, 왜모자반), 그리고 홍조류 11종(작은구슬산호말, 혹돌잎, 참도박, 참지누아리, 붉은까막살, 진분홍딱지, 진두발, 잔금분홍잎, 개서실, 모로우붉은실, 참보라색우무)의 16종은 모든 조사시기에 관찰되었다. 해조류의 단위면적당 생물량은 평균 $629.68g\;dry\;wt\;m^{-2}$이었으며, 계절별로 $119.30{\sim}1,660.96g\;dry\;wt\;m^{-2}$의 범위를 보였다. 조사지역 해조군집의 수직분포는 조간대에서 작은구슬산호말과 모자반류, 조하대 1 m에서 모자반류, 5 m에서 모자반류와 무절산호조류 그리고 10 m에서 무절산호조류로 대표되었다.

• Food Science and Biotechnology
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• 제17권3호
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• pp.613-622
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• 2008

Cancer chemopreventive effects can be exerted through the induction of phase II detoxification enzymes and the inhibition of inflammatory responses. In this study, the cancer chemopreventive effects and anti-inflammatory responses of 30 seaweed extracts were examined. The extracts of Dictyota coriacea and Cutleria cylindrica exhibited the high chemoprevention index, having 4.36 and 4.66, respectively. They also activated antioxidant response element at $100\;{\mu}g/mL$ by about 3-fold while did not activate xenobiotic response element. Seven seaweed extracts, Ishige okamurae, Desmarestia ligulata, Desmarestia viridis, Dictyopteris divaricata, D. coriacea, Sargassum horneri, and Sargassum yezoense, showed significant inhibition on nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$) production in a dose-dependant manner in $5-20\;{\mu}g/mL$. These seaweed extracts could be used as food materials for cancer chemoprevention. D. coriacea could contain potential chemopreventive agents not only that regulate genes via an ARE-dependent mechanism but also prevent the inflammation through inhibition of NO and $PGE_2$ production.

• 한국수산과학회지
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• 제54권6호
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• pp.1007-1016
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• 2021

This study examined the characteristics and seasonal distribution patterns of subtidal marine algal communities along the east coast of Korea, from 2016 to 2017, and recorded the coverage ratio (%) by the algal type. During the study period, 134 marine algae species (16 green, 29 brown, and 89 red) were identified at the survey sites. The maximum number of species was observed at the Nagok site (70 species), and the minimum at the Gisamoon site (50 species). The total average biomass (dry weight) during the survey period was 66.22 g/m², including green algae (2.19 g/m²), brown algae (38.10 g/m²), and red algae (25.94 g/m²). The dominant seaweeds in the vertical distribution based on coverage rates (%) were Sargassum yezoense and Dictyopteris divaricata at the upper, Symphyocladia latiuscula and Undaria pinnatifida at the middle, and Agarum clathratum subsp. yakishiriense and Plocamium telfairiae at the lower sections of the distribution. Richness, evenness, and diversity index, calculated based on the biomass of the abundant species, were estimated to be 6.36, 0.55, and 1.98, respectively, over the entire sea area. Based on the evaluation of the environmental states using community indices, the ecological evaluation index (EEI-c) of subtidal marine algal communities along the east coast of Korea was marked as 'good-moderate'.