• 한국식품영양과학회지
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• 제39권1호
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• pp.125-131
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• 2010

본 연구에서는 냉면육수의 품질을 향상시키고 천연 첨가제로서의 해동피 추출물의 이용 가능성을 검토하고자 해동피 추출물을 냉면육수에 0, 0.1, 0.2, 0.3, 0.4%를 첨가하여 $4^{\circ}C$에서 5일간 저장하는 동안 냉면육수에 미치는 영향을 살펴보았다. 해동피 추출물의 첨가량이 증가할수록 높은 pH를 유지하였으며, 0.3%와 0.4% 첨가구가 다른 첨가구에 비해 높은 pH를 유지하였고 완만하게 감소하였다. 총산도는 0.3%와 0.4% 첨가구가 완만하게 증가하면서 낮은 총산도를 유지하였다. 탁도는 저장기간이 길어질수록 0%와 0.1% 첨가구는 급격하게 탁도가 증가하였고, 반면 0.3%와 0.4% 첨가구는 완만하게 증가하여 저장 5일에는 첨가구간에 차이가 줄어들었다. 명도의 경우 0%와 0.1% 첨가구는 다른 첨가구 보다 급격하게 감소하였고, 0.3%와 0.4% 첨가구는 저장기간 동안 완만하게 감소하여 저장 0일과 저장 5일에 큰 차이를 보이지 않았다. 황색도와 적색도는 저장기간이 길어질수록 증가하여 색이 진하였고, 해동피 추출물의 첨가량이 증가할 수록 완만하게 증가하여 색의 변화가 많지 않음을 알 수 있었다. 0.3%와 0.4% 첨가구는 다른 첨가구와 비교하여 낮은 총균수를 나타내어 해동피 추출물을 0.3% 이상 첨가할 경우 냉면육수의 총균수를 억제하는데 도움을 주는 것으로 나타났다. 해동피 추출물 첨가량이 증가할수록 휘발성 염기 질소 함량은 적었으며, 증가하는 폭도 적어 부패 억제하는 효과가 있음을 알 수 있었다. 특히, 0.3%와 0.4% 첨가구의 효과가 큰 것으로 나타났다. 관능검사에서는 모든 항목에서 해동피 추출물을 첨가한 첨가구를 좋아하였고, 특히 0.3% 첨가구를 가장 좋아하였다. 이상의 결과를 종합해 보면 이화학적 및 미생물학적인 실험 결과에서 해동피 추출물을 0.3%와 0.4% 첨가할 경우 냉면육수의 저장성을 연장시켜 주었으며, 관능검사 결과 0.3%를 가장 좋아하였다. 따라서 냉면육수 저장시 해동피 추출물을 0.3% 수준으로 첨가할 경우 냉면육수의 맛과 저장성을 향상시켜줄 것으로 기대된다.

• 농촌계획
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• 제15권2호
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• pp.81-96
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• 2009

This study has found out the status of the environment ecology(topography structure. land-use, flora, plant community structure, wildbird) in 10 uninhabited islands(i.e. Kei island, Hadon island, Sangdon island, Daewa island, Hwanggang island, Naebi island, Oebi island, Prickly castor-oil tree island, Tongin island, Yuk island), Namhae-gun, Gyeongsangnam-do. Moreover, It has suggested ways of improving the environment ecology status by classifying the type of environment ecology about the degree of use and damage that based on the results of environment ecology survey. According to the results of topography structure survey, the survey site altitude was ranged within 1m$\sim$25m, otherwise, the radient was classified the rock area(.i.e. slope of less than $5^{\circ}$ the dead level) and the slope area where is steep slope. Moreover, there was showed evenly a variety of aspect. Land-use were divided the field(Kei island), dry native grasslands(Hadon island), naturalized grasslands(Sangdon island), Pinus thunbergii community(Dacwa island, Hwanggang island, Naebi island, Yuk island), the rock area(Oebi island, Prickly castor-oil tree island, Tongin island). As the results of flora survey, the number of plant species were 30$\sim$115 species and the naturalized species were found 2$\sim$12 species in each site. The results of plant community structure analysis, The dominant species were Pinus thunbergii and Pinus densiflora were in upper tree layer, furthermore, it were Pinus thunbergii, Eurya japonica, Prunus sargentii, Celtis sinensis, Morus bombycis, ect. in cannopy tree layer. In shrub layer, the dominant species were Rosa multiflora, Rubus crataegifolius, Parthenocissus tricuspidata, etc. The status of wildbird bird, had been found 42 species 938 individuals, especially, there were Bubo bubo kiautschensis(natural monument No. 324) and Haematopus ostralegus osculans(natural monument No. 326). According to these synthetic results, we are able to classify the 5 types of environment ecology such as the natural coast forest that composed of Pinus thunbergii and Pinus densiflora(Daewa island, Hwanggang island, Naebi island, Oebi island, Tongin island, Yuk island), the field in vegetation area(Kei island), vegetation succession area of fallow field type(Hadon island), vegetation damage area by the forest fire and disturbance elements(Prickly castor-oil tree island), dominant naturalized species grassland by grazing cattle(Sangdon island).

• Journal of Ecology and Environment
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• 제35권4호
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• pp.359-365
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• 2012

We investigated leaf disease intensity of Kalopanax septemlobus (prickly castor oil tree) caused by the parasitic fungus Mycosphaerella acanthopanacis, in thirty natural host populations in the Japanese Archipelago. The disease intensity observed for individual trees were analyzed using a generalized additive model as a function of tree size, tree density, climatic terms and spatial trend surface. Individual tree size and conspecific tree density were shown to have significant negative and positive effects on disease intensity, respectively. The findings suggest that the probability of disease infection is partly determined by dispersal of infection agents (ascospores) from the fallen leaves on the ground, which can be enhanced by aggregation of host trees in a forest stand. Regional-scale spatial bias was also present in disease intensity; the populations in northern Japan and southern Kyushu were more severely infected by the fungus than those in southwestern Honshu and Shikoku. Regional variation of disease intensity was explained by both climatic factors and a trend surface term, with a latitudinal cline detected, which increases towards the north. Further research should be conducted in order to understand all of the factors generating the latitudinal cline detected in this study.