• 한국자원식물학회지
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• 제31권3호
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• pp.211-217
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• 2018

Hibiscus syriacus (H. syriacus) as the national flower of Korea has been used as the herbal medicine in Asia. In this study, we evaluated the anti-inflammatory effect of 70% ethanol extracts from the root of Hibiscus syriacus (RHS-E70) and elucidated the potential signaling pathway in LPS-stimulated RAW264.7 cells. RHS-E70 dose-dependently suppressed NO production by inhibiting iNOS and IL-${\beta}$ expression in LPS-stimulated RAW264.7 cells. RHS-E70 inhibited the phosphorylation and degradation of $I{\kappa}B-{\alpha}$, which contributed to the inhibition of p65 nuclear accumulation and NF-${\kappa}B$ activation. Furthermore, RHS-E70 suppressed the phosphorylation of ERK1/2 and p38, which results in the inhibition of ATF2 phosphorylation and subsequent nuclear accumulation. These results indicate that RHS-E70 may exert anti-inflammatory activity by inhibiting NF-${\kappa}B$ and MAPK/ATF2 signaling. From these findings, RHS-E70 has potential to be a candidate for the development of chemopreventive or therapeutic agents for the inflammatory diseases.

• 한국산림과학회지
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• 제99권6호
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• pp.878-884
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• 2010

오존에 노출된 갈참나무 4가계의 오존 내성 차이와 생리적 지표들의 오존 민감성은 광합성 특성, 광색소 함량, MDA 함량 및 항산화효소 활성과 같은 생리적 지표들을 표준화하여 결정하였다. 오존 처리 후, 갈참나무의 잎내 탄소고정효율 감소는 4가계 모두에서 관찰되었으며, 그들의 감소율은 대조구의 -24.1%에서 -56.9% 범위를 보였다. 광색소 함량은 가계 간 및 처리 간 차이가 뚜렷하였으며, 총 엽록소 함량의 감소는 SU4 가계에서 가장 높았고 (-40.6%), US2 가계에서 가장 낮았다(-18.8%). APX 활성은 가계 간 및 처리 간 차이를 뚜렷하게 보였으며, US2 가계를 제외한 3가계에서 대조구보다 높게 나타났다. 생리적 지표들을 기준으로 한, 갈참나무 4가계의 오존 내성은 US1 > SU4 > US2 > SU1의 순으로 나타났다. 결론적으로 광합성 특성, 광색소 함량과 APX 활성은 갈참나무의 오존 스트레스 내성을 평가하는데 적절한 지표로 판단된다.

• 한국산림과학회지
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• 제96권3호
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• pp.369-375
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• 2007

이태리 포플러와 현사시를 대상으로 야외에서 돈분침출수를 관수하고 광합성특성, 엽록소함량, 증산량, 세포내 이산화탄소농도, ascorbate peroxidase, glutathione reductase 효소의 활성을 조사, 분석하였다. 이태리 포플러의 경우 엽록소 함량, 광합성률, 증산률, 기공전도도, 엽육세포내 $CO_2$ 농도가 돈분침출수 처리구가 대조구에 비해 높은 경향을 보였다. 또한 현사시의 엽록소 함량은 돈분처리구에서 대조구와 비슷하였지만 광합성률과 증산률, 기공전도도가 돈분침출수 처리구에서 대조구에 비해 약간 감소하는 경향을 보였다. 이로 미루어 이태리포플러를 돈분침출수가 유출되는 지역의 phytoremediation으로 활용하면 좋을 것으로 판단된다.

• Journal of Forest and Environmental Science
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• 제31권3호
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• pp.225-234
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• 2015

Mangroves are important coastal ecosystems and are located at the inter-tidal zones of tropical and sub-tropical belts. The global mangrove forests are declining dramatically because of the conversion of forests to shrimp farming, over-exploitation, pollution and freshwater diversion. The Bangladesh Forest Department initiated mangrove afforestation throughout the coastal belts of Bangladesh in 1966 to provide better protection for the coastal communities. Up to 1990, 120,000 ha of mangroves had been planted and it is one of the largest coastal afforestaton programs in the world. The objective of this study is to exploit the spatial extent of mangrove plantation and their dynamics of changes over the last two decades using multispectral Landsat imagery. The study area covers the coastal areas of Bangladesh that is extended over the eastern part of Sundarbans up to Teknaf, the southern tip of mainland Bangladesh. Mangrove plantations were interpreted visually on computer screen and interactive delineation of forest boundary was done. The mangrove plantation area has been estimated as 32,725, 47,636 and 43,166 ha for the year of 1989, 2000 and 2010, respectively. Mangrove deforestation by human activity has increased almost six times in the recent decade in comparison to the previous one. The mangrove forest loss due to coastal erosion has slightly declined in the 2000s. Mangroves have been lost primarily because of agricultural expansion. The result of this investigation will be helpful to understand the dynamics of mangrove plantation and the main drivers of changes in this coastal ecosystem.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2003년도 춘계 학술발표논문집
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• pp.73-76
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• 2003

약용식물로 널리 알려진 가시오갈피는 해발고 900m내외의 서늘한 지역에서 토양이 비옥하고 습기가 많은 활엽수림에 자생하며, 높은 광도와 기온을 나타내는 입지환경에서는 거의 찾아볼 수 없는 것으로 알려져 있다(박문수 등, 1996). 이러한 생육특성 때문에 인공재배를 하는 경우, 차광막을 사용하여 일정량의 빛을 차단하면 전천광을 모두 수광한 것에 비해서 높은 생장을 나타낸다고 한다(한종수 등, 2001).(중략)

• The Korean Journal of Ecology
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• 제23권6호
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• pp.453-460
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• 2000

The forest vegetation of Mt. seondal was classified into eight communities and one afforestation by the phytosocialogical method (Z-M method). In general, Quercus mongolica trees occupied most of the area, while afforestation forest was distributed on the lower slope, cultivated land, and at the vicinity of village. The vegetation on the top part of Mt. Seondal was comparatively well preserved, but that in the lower areas has been disturbed heavily by human activity and some had mixed forests composed of pine trees, oaks, ashes, and Rhododendron micrantum shrub. By cluster analysis method. nine groups were identified as follows : Quercus mongolica group, Q. mongolica - Pinus densiflora group, Q. mongolica - Rhododendron schlipen - bachii group, Q. mongolica - Symplocos chinensis for. pilosa group, P. densiflora group, Juglans mandshurica group, Fraxinus mandshurica group, Betula costata group and Larix leptolepis group. These groups showed differences in species composition, but Quercus mongolica, Q. mongolica - P. densiflora, Q. mongolica - R. schlippenbachii and Q. mongolica - S. chinensis for. pilosa groups among them showed very similar floristic composition to each other. In the relationship between polar ordination axes and environmental variables, altitude was the environmental factor determining variation in species composition along axis X and soil moisture was the environmental along axis Y. They were the main factors in determining forest vegetation. The result of cluster analysis and polar ordination for the forest vegetation were corresponded to those of phytosocialogical classification in classifying vegetation.

• 한국산림과학회지
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• 제111권1호
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• pp.186-200
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• 2022

본 연구는 국가숲길과 관련된 이해관계자가 정책을 수립하고 추진하는 데 필요한 기초자료 제공을 목적으로 일반 국민 1,200명과 국가숲길(지리산둘레길, 대관령숲길)을 이용한 경험이 있는 이용객 800명을 대상으로 국가숲길에 대한 인식분석을 실시하였다. 국가숲길 인지도는 일반국민과 이용객 모두 비슷한 수준으로 낮게 나타났으나 국가숲길 제도의 필요성, 이용의사와 추천의사는 유의한 수준으로 이용객이 보다 높게 나타났다. 국가숲길 이용목적, 선택이유, 관심사항, 문제점, 필요규제, 기대역할에 응답한 1순위는 일반국민과 이용객 간에 유사하게 나타났다. 일반국민과 이용객의 관심사항과 희망하는 활동사항 간에는 성별과 연령에 따라 유의적으로 차이가 있었으나 경관이 가장 중요한 요인으로 나타났다. 따라서 국가숲길에 올 수 있도록 하는 유인인자로 경관을 우선시하여 주요 조망점들에 대한 세부적인 특성 조사를 통해 일반국민과 이용객이 원하는 정보가 제공될 수 있는 체계가 마련되어야 한다. 이러한 결과는 국가숲길과 관련된 이해관계자에게 국가숲길 정책수립을 위한 기초자료로 활용될 것으로 판단된다.

• Journal of Microbiology and Biotechnology
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• 제17권5호
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• pp.800-805
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• 2007

Two endoglucanases with processive cellulase activities, produced from Fomitopsis palustris grown on 2% microcrystalline cellulose(Avicel), were purified to homogeneity by anion-exchange and gel filtration column chromatography systems. SDS-PAGE analysis indicated that the molecular masses of the purified enzymes were 47 kDa and 35 kDa, respectively. The amino acid sequence analysis of the 47-kDa protein(EG47) showed a sequence similarity with fungal glycoside hydrolase family 5 endoglucanase from the white-rot fungus Phanerochaete chrysosporium. N-terminal and internal amino acid sequences of the 35-kDa protein(EG35), however, had no homology with any other glycosylhydrolases, although the enzyme had high specific activity against carboxymethyl cellulose, which is a typical substrate for endoglucanases. The initial rate of Avicel hydrolysis by EG35 was relatively fast for 48 h, and the amount of soluble reducing sugar released after 96 h was $100{\mu}g/ml$. Although EG47 also hydrolyzed Avicel, the hydrolysis rate was lower than that of EG35. Thin layer chromatography analysis of the hydrolysis products released from Avicel indicated that the main product was cellobiose, suggesting that the brown-rot fungus possesses processive EGs capable of degrading crystalline cellulose.

• 센서학회지
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• 제32권2호
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• pp.95-99
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• 2023

Forest healing is an activity that enhances immunity and human health using various elements of nature, such as fragrance and scenery. Particularly, phytoncide composed of terpene, a natural volatile substance emitted by forest plants, activates the immune function and is an important raw material in health-related products, such as antibacterial and insect repellents. Moreover, phytoncide is used as a measure to evaluate the impact of the forest atmosphere on the human body. This study aims to implement a highly sensitive gas sensor system that can measure phytoncide in real-time, which is an essential element for realizing a forest healing environment. A gas generation apparatus was implemented by using an adsorption tube in consideration of filed applicability in a laboratory atmosphere to enable the measurement of α-pinene and limonene, which are among the main components of phytoncide. Throughout the experimental trials, the sensitivity of gas sensor arrays to α-pinene and limonene was confirmed. In addition, the classification results demonstrated the AVOCs and NVOCs can be well discriminated using PCA. The primary results confirmed the possibility of developing a high-sensitivity gas sensor system for phytoncide sensing in real time.

• 한국자원식물학회지
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• 제36권6호
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• pp.541-548
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• 2023

In the present study, the effects of HML on lipolysis, adipocyte browning, autophagy, and proliferation were investigated. HML affected lipolysis by increasing the protein levels of ATGL and HSL, and phosphorylation levels of HSL and AMPK. Furthermore, HSL decreased the perilipin-1 levels. In addition, free glycerol content was increased by HML treatment. HML affected adipocyte browning by increasing the protein levels of UCP-1, PGC-1α, and PRDM16. In addition, HML affected autophagy by increasing the levels of LC3-I and LC3-II, and decreasing those of SQSTM1/p62. Moreover, HML affected adipocyte proliferation by suppressing the proliferation of 3T3-L1 cells due to arrest of the cell cycle via blocking the expression of β-catenin and cyclin D1. These results suggest that HML induces lipolysis, adipocyte browning, autophagy, and inhibits excessive proliferation of adipocytes.