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Economic Analysis of Ecklonia cava Aquaculture Business (감태 양식사업의 경제성 분석)

  • Kang, Seok-Kyu
    • The Journal of Fisheries Business Administration
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    • v.44 no.2
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    • pp.69-81
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    • 2013
  • The purpose of this study is to examine the economic validity of Ecklonia cava aquaculture business for raising fishing people's revenue. The results of this study are summarized as follows: First, the production of Ecklonia cava is estimated about 251 ton or more in Jeju. Second, the distribution structure of Ecklonia cava is not established, but Ecklonia cava is traded much more through bio or processing corporation than through fisheries cooperative like other marine plants. Third, the price of Ecklonia cava should be at least 1,729 won per kilogram under 4.04% of capital cost for economic feasibility of Ecklonia cava aquaculture business. Finally, the results of sensitivity analysis show that there is economic feasibility of Ecklonia cava aquaculture business when the price of Ecklonia cava is more 2,500 won per kilogram and the capital cost is under 8.0%.

Antioxidant Activities and Quality Characteristics of Cracker Added with Ecklonia cava (감태 첨가 크래커의 항산화 활성 및 품질 특성)

  • Yu, Min-Young;Han, Young-Sil
    • The Korean Journal of Food And Nutrition
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    • v.31 no.6
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    • pp.821-827
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    • 2018
  • Ecklonia cava which is a kind of phaeophyta and belongs to Laminariales Alariaceae is a perennial seaweed distributed over Jeju and Dokdo islands. The purpose of this study evaluate antioxidant activities of Ecklonia cava crackers. Crackers were prepared with different measurements (0, 2, 4, 6, 8 g) of Ecklonia cava; indicated as S1, S2, S3, S4 and S5, and are used to examine and compare antioxidant activities, and quality characteristics. Ecklonia cava powder was used, after being extracted with 70% ethanol in hot water and done in freeze dehydration. To examine antioxidant activities of Ecklonia cava and cracker, DPPH radical scavenging activity, total phenolic and reducing power were tested. Total phenolic content was 36.86 mg GAE/g. DPPH radical scavenging activity and reducing power showed good vitality as amounts of Ecklonia cava powder increased (p<0.001). pH level decreased as amounts of power increased. L (lightness) values and b (yellowness) values decreased with an increased concentration of Ecklonia cava powder (p<0.001), whereas (redness) values didn't show tendency. S5 indicated the lowest spreadness. According to sensory evaluation, S4 (6 g) was preferred the most in terms of color, flavor, taste, appearance, texture, and overall palatability. Results suggest that Ecklonia cava powder has antioxidant effect and is useful as a functional food resource.

Dyeing Properties and Bio-Function of Cotton Fabrics with Ecklonia Cava Extract (감태 추출물을 이용한 면직물의 염색 특성과 항미생물성 및 자외선차단성)

  • Sarmandakh, Badmaanyambuu;Lee, An Rye;Yi, Eunjou
    • Textile Science and Engineering
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    • v.54 no.5
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    • pp.386-396
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    • 2017
  • In order to explore the potential use of Ecklonia cava which is abundant under coastal ocean in Korea for helping human's skin health in textiles, cotton fabric was dyed with Ecklonia cava extract at varied conditions including temperature, duration, dye concentration, pH, and dyeing repetition and it was evaluated as for fastness, antimicrobial activity, and sun protective property. As results, Ecklonia cava extract was estimated by HPLC to have $1,576{\mu}g/mg$ of Fucoxanthin known as a main functional colorant in brown algae. The fabric was optimized for maximum dye uptake at temperature of $80^{\circ}C$, duration of 50 min along all dye concentrations. The dyed fabric showed a color spectrum from Red Purple through Red to Yellow Red depending on dye concentrations. Repetition dyeings with lower concentration such as 50% and 90% owf respectively provided better fastness grades than single dyeing conditions showing identical color shade to them. They were also revealed to exhibit excellent anti-microbial activity even up to ten repetitions of laundry. As for sun protective property, dyeing with more than 50% owf Ecklonia cava on cotton fabric seemed to give higher UPF than 30 while undyed fabric had 8.4. These results imply that Ecklonia cava has a great potential to be used in textile dyeing for dermally functional clothing.

Physicochemical and Sensory Properties of Sponge Cakes Incorporated with Ecklonia cava Powder (감태 분말을 대체하여 제조한 스펀지 케이크의 품질특성)

  • Lee, Jun Ho;Heo, Seon Ah
    • Food Engineering Progress
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    • v.14 no.3
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    • pp.222-228
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    • 2010
  • Effect of baking on the physicochemical and sensory properties was investigated using a model system of sponge cakes incorporated with Ecklonia cava powder as a value-added food ingredient. Ecklonia cava powder was incorporated into cake batter at 5 levels (0%, 2%, 4%, 6%, and 8%, w/w) by replacing equivalent amount of wheat flour. After appropriate mixing, sponge cakes were baked at ${185^{\circ}C}$ for 20 min in an oven. The baked cakes were cooled to room temperature for 1 hr prior to all measurements. The specific gravity of batter increased gradually with increase in Ecklonia cava powder content. The specific volume of sponge cakes tended to decrease while baking loss increased. Volume of the cakes decreased with higher amount of Ecklonia cava powder in the formulation as indicated by the decrease in the volume index. Sponge cakes became darker and firmer with increase in Ecklonia cava powder content (p<0.05). Color, seaweeds smell, and taste were distinctively classified by the sensory analyses (p<0.05). Finally, correlation analysis indicated that level of Ecklonia cava powder incorporation was well-correlated with all the physicochemical and sensory properties studied except for $a^{*}$-value and sensory firmness (p<0.05, p<0.01 or p<0.001).

Antihypertensive Effect of Ecklonia cava Extract (감태 (Ecklonia cava) 추출물의 항고혈압 효과)

  • Hong, Jang-Hee;Son, Bum-Soo;Kim, Bum-Kyeong;Chee, Hee-Youn;Song, Kyung-Sik;Lee, Bong-Ho;Shin, Hyen-Cheol;Lee, Kyung-Bok
    • Korean Journal of Pharmacognosy
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    • v.37 no.3
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    • pp.200-205
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    • 2006
  • Ecklonia cava is brown alga which ow in the sea all over the world. It has been shown that Ecklonia cava has antioxidative, anticoagulant, and antiviral effect, lately. In this study, we examined the antihypertensiye effect of Ecklonia cava extract (Eca) on 2-kidney 1-clip Goldblatt Hypertensive Rats (GB-HT). In vitro assay, the angiotensin converting enzyme (ACE) activity was significantly inhibited by Eca (27-95% inhibition at $10-50\;{\mu}g/ml$). The systolic blood pressure of Eca-treated GH-HT significantly was decreased compared to that of control CB-HT (15% decrease at 50 mg/kg). The serum ACE activity was also inhibited 19% with 50 mg/kg Eca treatment. These results suggest that Eca can be used as antihypertensive functional foods and nutraceuticals.

Effect of Mixture Composed of Jeju' Scoria and Ecklonia cava on Anti-inflammation

  • Kang, Hyun
    • Biomedical Science Letters
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    • v.24 no.4
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    • pp.329-333
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    • 2018
  • The purpose of this study is to investigate the anti-inflammation effect of the mixture, consisting of a series of different ratio of Ecklonia cava extract and scoria. Also, to make more functional scoria powder into cosmetic material, studies on the toxicity by cell viability assay. Scoria is found in large amounts in Jeju Island, as an adsorbent of heavy metal ions ($Ni_2{^+}$, $Zn_2{^+}$, and $Cr_3{^+}$) in an aspect of its efficient utilization. Marine plants such as Ecklonia cava contain high amounts of polyphenolic antioxidants. The purpose of this study was to examine the anti-oxidative and anti-inflammation effects of combination of mixture of Eckloina cava extrat and scoria with optimal ratio. Therefore, this study suggested that combination of mixture of Eckloina cava extrat and scoria and its attenuated the oxidative and inflammatory reactions.

Effect of Ecklonia cava on the Blood Glucose, Lipids and Renal Oxidative Stress in Diabetic Rats (당뇨쥐에서 감태의 혈당, 혈청지질 개선효과 및 신장의 항산화효과)

  • Kim, Eun;Kim, Min-Sook;Kim, Se-Youn;Kim, Hyeon-A
    • Journal of the Korean Society of Food Culture
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    • v.23 no.6
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    • pp.812-819
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    • 2008
  • In this study, we assessed the effects of dietary supplementation with Ecklonia cava on blood glucose, lipid metabolism, and renal oxidative stress in streptozotocin (STZ)-induced diabetic rats. Male Sprague-Dawley rats were divided into a normal rat group fed on a control diet and diabetic rats fed on a control diet or supplemented with powder (15% w/w) or water extract of Ecklonia cava (2.5% w/w). Diabetes was induced by a single injection of STZ (60 mg/kg, ip) in citrate buffer. The animals were fed ad libitum with the experimental diet and water for 5 weeks. Dietary supplementation of Ecklonia cava powder and water extract was shown to reduce blood glucose levels in the diabetic rats, and the water extract was more effective than the powder. Dietary supplementation with Ecklonia cava also reduced LDL cholesterol and increased HDL-cholesterol levels in the diabetic rats. Renal glutathione S-transferase activity was increased in the diabetic rats as compared to the normal rats, but reverted to near control values as the result of dietary supplementation with Ecklonia cava. These results show that Eklonia cava exerts an anti-diabetic effect by improving blood glucose concentrations, LDL/HDL-cholesterol ratios, and antioxidative effects on the kidney in diabetic rats.

Effects of Ecklonia cava as fucoidan-rich algae on growth performance, nutrient digestibility, intestinal morphology and caecal microflora in weanling pigs

  • Choi, Yohan;Hosseindoust, Abdolreza;Goel, Akshat;Lee, Suhyup;Jha, Pawan Kumar;Kwon, Ill Kyong;Chae, Byung-Jo
    • Asian-Australasian Journal of Animal Sciences
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    • v.30 no.1
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    • pp.64-70
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    • 2017
  • Objective: In the present study, role of increasing levels of Ecklonia cava (seaweed) supplementation in diets was investigated on growth performance, coefficient of total tract apparent digestibility (CTTAD) of nutrients, serum immunoglobulins, cecal microflora and intestinal morphology of weanling pigs. Methods: A total of 200 weaned pigs (Landrace${\times}$Yorkshire${\times}$Duroc; initial body weight $7.08{\pm}0.15kg$) were randomly allotted to 4 treatments on the basis of body weight. There were 5 replicate pens in each treatment including 10 pigs of each. Treatments were divided by dietary Ecklonia cava supplementation levels (0%, 0.05%, 0.1%, or 0.15%) in growing-finishing diets. There were 2 diet formulation phases throughout the experiment. The pigs were offered the diets ad libitum for the entire period of experiment in meal form. Results: The pigs fed with increasing dietary concentrations of Ecklonia cava had linear increase (p<0.05) in the overall average daily gain, however, there were no significant differences in gain to feed ratio, CTTAD of dry matter and crude protein at both phase I and phase II. Digestibility of gross energy was linearly improved (p<0.05) in phase II. At day 28, pigs fed Ecklonia cava had greater (linear, p<0.05) Lactobacillus spp., fewer Escherichia coli (E. coli) spp. (linear, p<0.05) and a tendency to have fewer cecal Clostridium spp. (p = 0.077). The total anaerobic bacteria were not affected with supplementation of Ecklonia cava in diets. Polynomial contrasts analysis revealed that villus height of the ileum exhibited a linear increase (p<0.05) in response with the increase in the level of dietary Ecklonia cava. However, villus height of duodenum and jejunum, crypt depth, villus height to crypt depth ratio of different segments of the intestine were not affected. Conclusion: The results suggest that Ecklonia cava had beneficial effects on the growth performance, cecal microflora, and intestinal morphology of weanling pigs.

The Effect of Ecklonia cava Extracts on Bone Turnover Markers in Ovariectomized Rats (갱년기 유도 흰쥐에서 감태 추출물이 골 대사 지표물질의 변화에 미치는 영향)

  • Kang, Sung-Rim;Kim, Mi-Hyang
    • Journal of Life Science
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    • v.19 no.12
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    • pp.1841-1846
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    • 2009
  • Menopause is often associated with the incidence of several chronic diseases including osteoporosis, cardiovascular disease, and obesity. Hormone replacement therapy (HRT) is an effective regimen that has been found to prevent these diseases in postmenopausal women. However, HRT is accompanied by an increased risk of unfavorable outcomes. Therefore, this study was conducted to evaluate the effects of Ecklonia cava, a kind of seaweed, extract on bone turnover markers in symptomatic menopausal women. For this study, the following four groups of 9-week-old Sprague-Dawley rats were evaluated over 6 weeks: normal rats (SHAM), ovariectomized rats (OVX-CON) and ovariectomized rats that were treated with Ecklonia cava extracts. The optimum extraction temperature and solvent of Ecklonia cava were found to be $80^{\circ}C$ and 80% ethanol. We measured the osteocalcin and CTx content, enzyme ALP activity in serum and collagen content in the cartilage, bone, skin and lungs. We found that the levels of indicators of bone metabolism such as ALP, osteocalcin and CTx were lower in rats in the Ecklonia cava extract group than the OVX-CON group. In addition, the collagen contents in the bone, cartilage, skin and lungs decreased in response to ovariectomy, but the levels of collagen were greater in the bone of rats that were treated with Ecklonia cava extract than in the bone of rats in the OVX-CON group. According to these results, we were able to know the effects of Ecklonia cava extract on bone aging in ovariectomized rats. Consequently, we expect Ecklonia cava extract to have an effect on bone aging in postmenopausal women.

Nursery and Main Culture Conditions for Mass Cultivation of the Brown Alga, Ecklonia cava Kjellman (갈조류 감태 (Ecklonia cava Kjellman)의 대량양식을 위한 가이식 및 양성 조건)

  • Hwang, Eun-Kyoung;Gong, Yong-Geun;Ha, Dong-Su;Park, Chan-Sun
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.43 no.6
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    • pp.687-692
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    • 2010
  • The mass cultivation of Ecklonia cava Kjellman was studied as a potential biomass source for the extract industry in Korea. Experiments were conducted to investigate the optimal conditions for artificial seed production and mass cultivation of this species. Maximum growth and young thalli development in the nursery culture area occurred at 2 m depth, whereas maximum growth of thalli in the main culture area occurred at 1 m depth. Production of E. cava was between 2.6 and 3.6 kg wet wt. $m^{-1}$ after depth control and removal of fouling organism, etc. The relationship between optimal water depth for culture and underwater irradiance during the E. cava cultivation was calculated as: y = -0.718x + 8.042 ($r^2$=0.976). The growth rates achieved in this trial indicate that E. cava cultures could produce and supply sufficient biomass.