• 생명과학회지
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• 제17권5호
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• pp.652-657
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• 2007

천연 향신료를 이용한 기능성 생마 신선편이 제조를 위해, 국내외에서 사용되는 향신료들을 대상으로 물 추출물 및 메탄을 추출물을 제조하였다. 향신료의 추출효율은 향신료에 따라, 추출용매에 따라 큰 차이를 나타내었으며, 추출물들의 성분 분석 결과 향신료의 우수한 영양학적 특성을 확인하였다. 먼저 물 추출물들의 항균, 항산화 및 항혈전 활성을 검토한 결과, 물 추출물들은 항균활성을 나타내지 않았으며, 페퍼민트 추출물에서 트롬빈 타임이 26배 이상 연장되어 강력한 항혈전 활성을 확인하였으며, DPPH 소거능 평가결과 계피 및 로즈마리 추출물에서 각각 $61.3{\mu}g/ml$ 및 $84.3{\mu}g/ml$의 $IC_{50}$를 확인하였다. 한편 메탄을 추출물들에서는 타임, 생강, 및 계피 추출물이 생마 저온부패균에 대해 항균력을 나타내었으며, 로즈마리 추출물은 생마 저온부패균에 대한 항균력은 없었으나, 강력한 항충치균 활성을 나타내었다. 또한 계피 및 산초 추출물에서 우수한 항혈전 활성을, 타임 및 계피 추출물에서 강력한 DPPH 소거능을 확인하였다. 따라서 항산화 및 항혈전 활성이 동시에 우수한 페퍼민트 및 계피 물 추출물들을 이용하여 기능성 생마 신선편이를 제조하였으며, 제조된 신선편이는 $4^{\circ}C$에서 24시간 보관 후에도 페퍼민트 및 계피 유래의 항산화 및 항혈전 활성을 유지하였다. 이러한 결과는 천연 향신료를 이용하여, 저장성이 우수하면서, 기능성, 관능성이 강화된 신선편이 제조가 가능함을 제시하고 있다.

• 동아시아식생활학회지
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• 제6권2호
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• pp.277-284
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• 1996

마(산마, 재배마)의 생리활성 물질의 기능성을 밝힐 목적으로 마의 갈변물질, 점질물 및 식이섬유를 분리 정제하여 항변이원성을 검색하여 다음과 같은 결과를 얻었다. 1. 마의 갈변효소를 cathol, hydroquinion, resorcinol, pyrogallol 등에 반응시켜 얻은 갈변물질의 항변이원성은 sodium azide에 대하여 기질에 따른 차이가 없었으나, 2-aminofloureno에 대해서는 모든 기질에서 유의적으로 높았다. (P＜0.01) 2. 마의 점질물과 식이섬유($\alpha$-cellulose, hemicellulose, pectin) 의 sodium azide와 2-ami-noflourene에 대한 항변이원성은 $\alpha$-cellulose와 hemicellulose에서 유의적으로 높았으며(p＜0.01), $\alpha$-cellulose와 흡착 반응시킨 2-amino-flourene에 대한 항변이원성은 5시간 반응시 가장 높았고 반응시간이 경과함에 따라 감소하였다.

• Journal of Plant Biotechnology
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• 제6권2호
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• pp.103-106
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• 2004

Plantlet regeneration from the shoot apex was studied in three different genotypes of the chinese yam (Dioscorea opposita Thunb) cv. Jnagma and Danma, Dunggunma. The effects of plant growth regulators and inorganic salts concentration of the culture medium on bud induction and shoot growth were examined. The combinations of 0.2 mg/L BAP + 0.2mg/L kinetin, 0.01mg/L NAA + 0.2 mg/L kinetin and a single treatment of 0.2mg/L BAP were equally effective for bud and shoot formation from the shoot apices in the three cultivars. Auxin (2,4-D, NAA) treatment enhanced calli formation from the cultured apices. Also, the shoot apices of the cv. Dunggunma produced more callus and buds on the culture medium (MS) containing 0.05mg/L NAA and 0.5-1.0mg/L SAP. Lower salt strength of medium inhibited shoot elongation but did not have much effect on the shoot and bud induction from the shoot apices. These results will be useful to obtain disease-free plants of the Chinese yam.

• 한국응용과학기술학회지
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• 제32권4호
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• pp.631-638
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• 2015

In Korea, yam with thermal treatment is widely used to produce tea and beverage, which appeals to all age groups. To better understand the antioxidative activity of thermal treatment yam (Dioscorea batatas $D_{ECNE.}$), n-butanol and ethyl acetate extracts were evaluated with different antioxidant testing system. Their antioxidant activities, including ABTS [2,2' -azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt] radical scavenging activity, DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity, reducing power, and ferric reducing antioxidant power as well as total phenol contents were assessed in vitro. Results showed ethyl acetate extract ($51.63{\pm}2.51mg\;CAE/g$) possessed similar total phenol content compared with n-butanol extract ($53.93{\pm}1.00mg\;CAE/g$). Ethyl acetate extract also exhibited similarly stronger antioxidant activity compared with n-butanol extract apart from ABTS radical scavenging activity assay.

• 한국작물학회지
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• 제47권4호
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• pp.297-300
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• 2002

Endogenous ABA and batatasins were first quantified in the stored tubers and bulbils of the Chinese yam, Dioscorea opposita Thunb. cv. 'Tsukune' by GC-MS with comparison of internal standard, and sugar content was also analyzed by HPLC with comparison of external standard. Endogenous ABA content in stored tubers and bulbils was rapidly decreased as storage period prolonged. ABA content of the bulbils was always higher than that of tuber during storage periods. All batatasins of stored tubers and bulbils at 30 days after storage decreased steadily compared to 120 days after storage. On the contrary, batatasin-Ⅲ of the stored tuber and bulbils was only decreased at 60 days after storage. In Dioscorea opposita Thunb. cv. 'Tsukune' like D. japonica, D. alata, and D. bulbifera, may be controlled by endogenous batatasins and ABA, In these compounds, batatasins rather than ABA might be closely related to dormancy-inducing compound during dormancy of the Chinese yam, Dioscorea opposita Thunb. cv. Tsukune.

• Fibers and Polymers
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• 제5권4호
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• pp.275-279
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• 2004

Yarn tension is a key factor that affects the efficiency of a ring spinning system. In this paper, a specially constructed rig, which can rotate a yam at a high speed without inserting any real twist into the yarn, was used to simulate a ring spinning process. Yarn tension was measured at the guide-eye during the simulated spinning of different yarns at various balloon heights and with varying yarn length in the balloon. The effect of balloon shape, yarn hairiness and thickness, and yam rotating speed, on the measured yarn tension, was examined. The results indicate that the collapse of balloon shape from single loop to double loop, or from double loop to triple etc, lead to sudden reduction in yarn tension. Under otherwise identical conditions, a longer length of yarn in the balloon gives a lower yarn tension at the guide-eye. In addition, thicker yarns and/or more hairy yarns generate a higher tension in the yarn, due to the increased air drag acting on the thicker or more hairy yarns.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 춘계학술대회
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• pp.829-832
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• 2014

본 연구는 발효 홍국마로부터 에탄올 추출물 농도에 따른 생리활성 효과를 조사하기 위하여 실시하였다. 발효 홍국마 에탄올 추출물로부터 색소, DPPH radical 소거활성, 환원력 및 monacolin K 함량을 조사하였다. 그 결과, 기질로서 장마를 Monascus sp. MK805 균주로 발효하였을 때 홍국색소는 29.6(황색), 15.1(오렌지색), 20.4(적색), DPPH radical 소거활성은 72.8%, 환원력은 1.74 및 monacolin K 함량은 480.6 mg/kg으로 각각 조사되었다. 이처럼 발효 홍국마는 항산화 및 항고지혈증 관련 기능성 식품 및 의약품 소재로의 이용 기능성이 높은 것으로 사료된다.

• 생명과학회지
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• 제10권3호
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• pp.229-235
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• 2000

현재 마차나 마죽의 형태로 이용되고 있는 마분말을 사용하여 열풍건조, 진공건조, 동결건조를 이용 하여 건조를 행하였다. 각 건조 방법별로 마분말의 물리적 특성치인 공극률은 열풍 건조한 시료가 12.26%로 가장 작게 나타났으며, 진공건조 31.17%, 동결건조가 41.00%의 순으로 나타났다. 또한 총 공 극 면적 역시 동결, 진공, 열풍건조의 순으로 나타났으며 공극의 평균지름은 반대의 순으로 나타났다. 일반성분에서는 초기 수분함량에서 다소 차이가 있었으나 전체적인 차이는 크게 나지 않았다. 또한 총 페놀 함량에서도 동결건조한 것이 가장 높은 함량을 나타내었으나 그 10-2mg 단위로 량에 있어서는 거 의 비슷하였다. 과실이나 야채류의 저장에서 신선도를 판정하는 중요한 지표로 이용되고 있는 Ascorbic acid 의 함량은 건조방법별로 별다른 차이를 나타내지 않았으나 동결건조 제품이 가장 높은 함량을 나 타내었고 증습에 따라 ascorbic acid의 함량은 감소하였다. 저장 적정 수분함량을 구하기 위해 단분자층 수분함량을 구한 결과는 BET식과 GAB식에서 공히 동결건조한 시료가 다른 시료보다 높은 값을 나타 내었고, 등온 흡습선으로서 두 식의 접합도는 BET식이 건조 방법별로 0.95 이상의 상관계수 값을 나타 낸 반면 GAB식은 동결, 진공건조의 경우에는 0.99이상의 높은 상관계수를 나타내었으나 열풍건조의 경 우에는 다소 낮은 상관계수 값을 나타내었다.

• 한국식품영양학회지
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• 제22권3호
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• pp.449-455
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• 2009

The principal objective of this study was to determine the quality and potential of DHEA formation after the addition of diosgenin of yam(Dioscorea spp.) during the fermentation of soybean paste. All samples were divided into three groups based on the variety of yam. In sample A, the soy source was not separated from soybean paste and in sample B, the soybean source was separated from soybean paste. The range in salt concentration in the samples was as follows : sample A: 10.5~11.8%, samples B: 7.9~8.8%. However, no substantial differences between the two samples, in terms of salt content, were observed. The crude protein and crude lipid content were found to decrease with the fermentation time of soybean paste(passage of 30 days: 26.4~32.3% and 4.45~5.90%, passage of 60 days: 24.5~28.5% and 3.95~4.90%, respectively). As the fermentation time of soybean paste increased, the nitrogen from amino compounds increased(passage of 30 days: 531.9~687.7 mg%, passage of 60 days: 551.3~706.8 mg%). In regards to color and preference, sample B, where the soy source was separated from soybean paste, was better than sample A, where the two components were not separated. After a soybean paste fermentation time of 60 days, the diosgenin of yam, which was added to the soybean paste, was not detected in tested samples, and the contents of DHEA formation in soybean paste were as follows: sample A: $488.0\pm42.5{\sim}719.3\pm44.8{\mu}g/g$, sample B: $287.3\pm20.6{\sim}482.7{\pm}36.5{\mu}g/g$.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.247-247
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• 2017

Byobusan area of Aomori prefecture in Japan was a marshy sand dune and had developed for agricultural land use with a large-scale sprinkler system. Recently, it becomes an agricultural problem at this area that distinctive damage with browning maculation and fissures frequently occurs in Chinese yam tubers. Acetaldehyde is one of the factor candidates of underground part damage in plants. In this study, incidence rate of the tuber damage, and the morphological character and elemental composition of the damage parts in tubers were investigated with applications of excessive irrigation water or acetaldehyde water solution into the yam field. The incidence rate of the distinctive tuber damage increased as the input amount of irrigation water was increased. At the browning maculation parts of the tubers, many fissures and damages of cork layer were observed under scanning electron microscopy. In addition, the periderm of tubers was significantly thicker in damaged parts than in non-damaged parts. Funguses, bacterium and nematodes were not observed in the damaged part under scanning electron microscopy. The weight ratio of each constituent element in an analyzed area relative to the total weight of major essential elements was measured with energy dispersive X-ray spectrometry. The results showed that the weight ratios of boron, carbon, phosphorus, sulfur and calcium were higher in damaged parts than in non-damaged parts whereas the weight ratios of oxygen and chlorine were lower in damaged parts than in non-damaged parts. It was also shown by this spectrometry that iron, cadmium, lead and zinc were not directly involved in occurrence of the tuber damage. In this study, there was no remarkable difference of tuber appearance between non-acetaldehyde and acetaldehyde application treatments. From the above results, it is shown that the damage would be a physiological disorder induced by the input of a large quantity of water in the sandy field.