The polyphenol content of common buckwheat, Tartary buckwheat, buckwheat leaves, sea tangle, sea mustard ears, and fusiformis were analyzed. Among these, buckwheat leaves exhibited the highest polyphenol content. Hot water extraction followed by treatment with plantase enzyme increased the polyphenol yield by 56% for buckwheat leaves and by 34% for sea tangle. Cytotoxicity test performed on 3T3-L1 pre-adipocytes for seaweeds and buckwheat leaves revealed no significant cytotoxic effects compared to that of the control group at 1 mg/mL. Additionally, when examining the effects of buckwheat leaf and sea tangle extracts on the pre-adipocytes differentiation, into adipocytes confirmed that buckwheat leaf extract inhibited fat differentiation at 10 mg/mL and sea tangle at 0.1 mg/mL. Buckwheat/sea tangle enzyme food had 6.5 times higher amylase activity, 27 times higher protease activity, and more than twice as high dietary fiber, polyphenol, and DPPH scavenging ability as brown rice enzyme foods. Buckwheat/sea tangle enzyme-supplemented food contained more than 30% more phlorotannins and 7.8% more alginic acid than brown rice enzyme-supplemented food.

In order to study low salinity Oiji (cucumber pickled in salt) with a reduced content of sodium, which was accomplished by replacing the salt in this saliferous food, we produced Oiji using sea tangle and, then performed physicochemical and sensory evaluations. It was found that the moisture content of Oiji was decreased with increasing the amount of added sea tangle. The pH and acidity were significantly different between the samples made with sea tangle, and the pH and acidity showed no consistent tendency according to the amount of sea tangle powder added. The salinity of Oiji was the highest in the control Oiji (2.92%), and the higher the amount of sea tangle added, the lower was the salinity in the Oiji with the salt replaced by sea tangle (2.78 to 2.89%). The sodium content of Oiji was also the highest in the control Oiji (591.65 mg/ 100 g) and significantly decreased with the increasing addition of sea tangle (560.43~366.71 mg/100 g). The color value of Oiji showed a significant difference between the samples, with no consistent tendency according to the amount of added sea tangle powder. The hardness of Oiji was significantly greater in the Oiji with the salt replaced by 40% of sea tangle, with greater hardness noted as the amount of added sea tangle powder increased (217.70 g). As a result of the acceptance test of Oiji, there were significant differences between the samples in overall acceptance, appearance, and taste, showing that the Oiji with salt replaced by 30% of sea tangle was significantly highest in overall acceptance and taste. The attribute difference test showed a significant difference only for the brown color, while no significant differences were found between the samples for off-flavor, bitter taste, fermented taste, salty taste, sour taste, hardness and crispness. The above results demonstrated that when sea tangle was substituted for 30 to 40% of the salt content, the Oiji with a low content of sodium and low salinity can be produced with a high level of taste and overall preference. Therefore, this study firmly demonstrated that 30 to 40% of the salt can be replaced by sea tangle as a substitute in order to produce Oiji that has low salinity, a low sodium content.

본 연구는 우리나라의 전통음식으로 전 세계적으로 알려진 김치의 기능성 강화식품으로 고부가가치를 창출하기 위하여 대조김치와 기능성 김치의 항산화능을 관찰하였다. 연구결과, 버섯과 다시마 추출물과 갓을 첨가하여 발효시킨 기능성 김치에서는 총 폴리페놀 함량이 대조김치보다 2배 증가되어 있었고, DPPH 라디칼과 ABTS 양이온 소거능에서도 기능성 김치가 대조김치에 비해 각각 2.7배와 1.7배 가량 유의적으로 높았다. 또한, FRAP 환원능은 기능성 김치가 대조김치에 비해 1.6배를, ORAC가는 1.1배를 나타내었다. 이상의 연구결과를 통해 항산화 활성이 높은 재료를 첨가한 김치는 발효과정을 거치면서 김치가 가지고 있는 건강기능성을 더욱 향상시킨 항산화 강화 기능성 김치의 개발 가능성을 확인하였다. 따라서 본 연구는 항산화 강화 김치의 생산기술 개발에 초석을 이루는 자료를 제공할 수 있을 것으로 기대된다.

The goal of this study was to determine moisture sorption isotherms of fermented sea tangle powder (FSTP) at 4 °C, 25 °C, and 37 °C by using the static gravimetric technique in a water activity (aw)rangeof0.11to0.93andtheyexhibittypeIII behavior, typical of food products. At constant aw, an equilibrium moisture content (EMC) decreased with increasing temperature. The EMC increased with increasing aw at constant temperature. These moisture sorption isotherms have been fitted using eight different mathematical models. The Guggenheim-Anderson-de Boer (GAB) model presents the best fit in describing equilibrium moisture content and water activity relationships for the FSTP over the entire range of temperatures. Isosteric heat of sorption (IHS) was determined from the equilibrium sorption data using the Clausius-Clapeyron equation. The IHS decreased from 61.68 to 48.70 kJ/mol with increasing the EMC from 0.14 to 3.22 g/g dry basis, approaching the latent heat of vaporization of pure water (, 45.71 kJ/mol). The obtained IHS indicating intermolecular attractive forces between the moisture vapor and sorption sites is an important factor to predict the drying and storage processes for the FSTP.

Diabetic nephropathy has been increasing, although blood glucose and blood pressure can be controlled by angiotensin converting enzyme(ACE) or advanced glycosylation end products(AGE) inhibitors in the diabetic patients. We investigated the effect of dietary supplementation of sea tangle on the blood glucose, and pathological scoring of diabetic kidneys in the streptozotocin(STZ) induced diabetic rats. Male Sprague-Dawley rats were divided into normal rats fed control diet and diabetic rats fed control diet or control diet supplemented with powder or oater extract of sea tangle. Diabetes was induced by a single injection of STZ(60mg/kg, ip) in citrate buffer. The animals were fed the experimental diet and water for 13 weeks. Dietary supplementation of sea tangle decreased blood glucose in the diabetic rats. However, dietary supplementation of sea tangle did not affect the antioxidant enzyme activities, MDA content and pathology of diabetic kidneys. These results indicate that decreased blood glucose by sea tangle could not delay the progression of diabetic kidney disease.

The purpose of this study was to investigate the antioxidative effect and quality characteristics of cookies made with Sea tangle powder(STP). The cookies were at 30℃ for 45 days. The 3% STP had higher pH value compared to the other groups and control. As more STP was added, the L-value and b-value decreased, and the a-value increased for the color values. The results of sensory evaluation and acceptance test showed that the cookies with 3% STP was significantly more preferable in overall acceptability than the others. The acid value, peroxide value, and thiobarbituric acid value were lower in cookies with 3% and 6% STP than in those cookies made 9% STP and the control cookies.

다시마 분말 첨가식이가 당뇨쥐의 당질과 지질대사 및 항산화효소계에 미치는 영향을 규명하기 위하여 SD계 횐쥐에 17% 다시마 분말을 급여하여 7주간 실험 사육한 후 혈청의 포도당 및 지질농도와 주요장기의 항산화효소의 활성도를 관찰하였다. 다시마 당뇨군(TI)에서 다사마 섭취는 당뇨에 의한 체중감소 현상을 보였다. 당뇨군의 혈당 농도는 다시마 섭취에 의한 혈당강하 효과는 3주째에 나타났다. 당뇨에 의한 산화적 스트레스로 인해 증가한 GST 활성도가 다시마 섭취로 인해 정상 수준으로 저하됨으로써 다시마의 섭취가 당뇨시 산화적 반응에 대한 방어기전을 제공할 수 있음을 유추할 수 있었다. 또한 중성지방이 감소하고 HDL-콜레스테롤의 증가하는 경향으로 심혈관계와 관련되는 당뇨합병증의 억제 가능성을 제시하였다.

국내 연안의 대표적인 갈조류인 다시마로부터 효과적인 알긴산을 추출하기 위해 다시마 추출액의 전처리 추출공정인 열수 추출공정, 당 또는 염첨가에 의한 추출 및 효소 첨가추출공정에 따른 다시마 추출액의 물성변화를 조사하였다. 열수 추출 및 효소 첨가 추출공정의 경우 추출시간이 증가할수록 점성이 증가함을 보였으며, 추출시간 l시간 이후부터는 비교적 완만한 증가치를 보였다. 당 또는 염첨가에 의한 추출공정시 첨가된 농도가 증가할수록 점성이 증가하였으며, EDTA-2Na의 경우는 첨가농도에 관계없이 매우 낮은 정성치를 나타내었다.