• Title/Summary/Keyword: Ecklonia cava (EC)

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갈조류의 영양적 특성과 가금에서 기능성 물질로서의 갈조류 추출물의 이용

  • 심재민;안병기;강창원
    • Proceedings of the Korea Society of Poultry Science Conference
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    • 2003.11a
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    • pp.38-52
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    • 2003
  • Seaweeds are large algae that grow in a saltwater or marine environment. There are over 400 species of seaweeds in the bay of Korea. Most seaweeds are divided into three groups according to their color : the green seaweeds(division Chlorophyta), the brown(Phanphyta) and the red(Rhodophyta), Seaweeds have been harvested for use as food, fertilizer, animal feed and medicines for thousands years. In the past decade, there has been increasing interest in using seaweeds for animal feedstuffs and feed supplements as their health qualities are becoming better known. In this review some perspectives on nutritional values and the role of functionality ingredients of various seaweeds will be also discussed. Ecklonia cava kjellman(EC), a perennial seaweed, is one of the main components of the marine forests along the East and South coasts of Korea. We conducted three experiments to evaluate the nutritional values of EC and the crude lectin extracted residues from EC(LEEC) and to investigate their dietary effects on productivity and immunocompetence in poultry. The crude protein content of EC was relatively low(about 10 %) and its amino acids were poorly available. But, the results of our study suggested that EC can be used into broiler feed up to 3 % without any adverse effect, if its nutritional values are well evaluated prior to use. Similar results of dietary LECC up to 1.0 % level on egg production and egg quality have been obtained in layers. The concentrations of serum TNF-${\alpha}$ after Salmonella challenge were rapidly increased in accordance with the level of LEEC. These results indicated that LEEC can be used as a feed additives for enhancing of immunocompetence in poultry.

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Inhibitory Effect of Ecklonia cava Extracts against Lipase Activity and Stability Effect of Temperature and pH on Their Activity (감태 추출물이 지니는 Lipase 저해활성의 열 및 pH 안정성)

  • Jung, Ji-Yeon;Kim, Koth-Bong-Woo-Ri;Lee, Chung-Jo;Kwak, Ji-Hee;Kim, Min-Ji;Kim, Dong-Hyun;SunWoo, Chan;Kim, Tae-Wan;Ahn, Dong-Hyun
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.40 no.7
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    • pp.969-974
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    • 2011
  • This study was performed to investigate the inhibitory activity of Ecklonia cava (EC) against lipase and the stability of this activity under various heat and pH conditions. As a result, EC ethanol extract showed lipase inhibitory activity of 59, 34 and 19% at concentrations of 5, 2.5 and 1 mg/mL, whereas the water extract showed low inhibitory activity at all concentrations compared to that of the ethanol extracts. In a heat and pH stability test, the inhibitory activity of the EC ethanol extract increased with heat treatment at $121^{\circ}C$ for 15 min compared with the control and was stable in the pH range of 2~10. Therefore, the EC ethanol extract could be useful as a natural anti-obesity agent.

Trypsin Inhibitory Activity of Water Extracts from Ecklonia cava as Affected by Temperature and pH (감태 물 추출물의 Trypsin 저해활성에 대한 열 및 pH 안정성)

  • Jung, Seul-A;Kim, Koth-Bong-Woo-Ri;Kim, Min-Ji;Kim, Dong-Hyun;SunWoo, Chan;Kim, Hyun-Jee;Jeong, Da-Hyun;Jeong, Hee-Ye;Kim, Tae-Wan;Cho, Young-Je;Ahn, Dong-Hyun
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.6
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    • pp.840-845
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    • 2012
  • This research was done to verify the inhibitory activity of water extracts from Ecklonia cava (WE-EC) against trypsin and the effects on various temperature and pH conditions. The WE-EC showed high trypsin inhibitory activity of 76, 62 and 60% at concentrations of 5, 2.5 and 1 mg/mL, respectively. In all heat treatments excepted for two conditions, such as $100^{\circ}C$ for 20 min and $121^{\circ}C$ for 15 min, the inhibitory activity was stable compared with the untreated group. With regard to pH stability, the WE-EC showed no significant changes at pH 2~8, but somewhat decreased inhibitory activity was revealed at pH 10. Therefore, the WE-EC could be used in the food industry as a natural trypsin inhibitor.

The Inhibitory Effect of Ecklonia cava and Eisenia bicyclis Ethanol Extract on Histamine in Mackerel (감태와 대황 에탄올 추출물 처리에 의한 저장 중 고등어 내의 히스타민 생성 억제 효과)

  • Kim, Bo-Ram;Kim, Koth-Bong-Woo-Ri;Kim, Min-Ji;Kim, Dong-Hyun;Jung, Seul-A;Kang, Bo-Kyeong;Bark, Si-Woo;Pak, Won-Min;Park, Hong-Min;Lim, Sung-Mee;Cho, Young-Je;Ahn, Dong-Hyun
    • Microbiology and Biotechnology Letters
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    • v.42 no.1
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    • pp.93-98
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    • 2014
  • This study was conducted to investigate the inhibitory effect of Ecklonia cava (EC) and Eisenia bicyclis (EB) ethanol extract on histamine production in mackerel. Changes in viable cell counts, histamine contents, pH and VBN of mackerel fillet treated with ethanol extracts during 25 days at 4 were measured. Treatments of EC and EB ethanol extract had reduced growth of viable cells by 2 log cycles during storage. Production of histamine was decreased by EC and EB extracts (115 and 96 ppm) when compared to the control at 5 days (384 ppm). The pH of mackerels treated with EC and EB extracts were no different, while the pH of the control increased during storage. Furthermore, the VBN of mackerels treated with EC and EB extracts were significantly decreased when compared to the control. In conclusion, EC and EB extract may reduce scombroid fish poisoning by decreasing histamine production in mackerel during refrigerated storage.

Antioxidant and α-glucosidase inhibition activity of seaweed extracts (해조류 추출물의 항산화 및 α-glucosidase 저해 활성)

  • Kim, Jin-Hak;Kang, Hye-Min;Lee, Shin-Ho;Lee, Ju-Young;Park, La-Young
    • Food Science and Preservation
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    • v.22 no.2
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    • pp.290-296
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    • 2015
  • The antioxidant and ${\alpha}$-glucosidase inhibition activities of 10 kinds of seaweeds Ecklonia cava (EC), Ecklonia stolonifera (ES), Eisenia bicyclis (EB), Capsosiphon fulvescens (CF), Sargassum fulvellum (SF), Undaria pinnatifida (UP), Sargassum thunbergii (ST), Codium fragile (CFr), Hizikia fusiformis (HF), and Enteromorpha prolifera (EP) were investigated. Among all the tested seaweed extracts, the total polyphenol and flavonoid contents of the EB extract were highest 150.81 mg/g and 77.02 mg/g, respectively. The DPPH and ABTS radical scavenging abilities of the EB ethanol extract (1 mg/mL) were 86.26% and 99.71%, respectively, and its SOD-like activity and reducing power were 21.34% and 1.710 ($OD_{700}$). The ${\alpha}$-glucosidase inhibition activities of the EC, EB, and ST were above 98% at the 0.1 mg/mL concentration. These results suggest that seaweed extracts effectively prevent the what of antioxidants and decrease the blood glucose level, and may be used to develop various functional products.