• 한국산림과학회지
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• 제103권2호
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• pp.175-181
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• 2014

경상남도 남해군의 유사한 입지환경에서 생육한 삼나무 조림지를 대상으로 47년생의 고밀도임분($667tree{\cdot}ha^{-1}$)과 49년생의 저밀도임분($267tree{\cdot}ha^{-1}$)으로 구분한 후 임분밀도에 따른 상대생장식과 현존량 확장계수를 비교하였다. 흉고직경을 독립변수로 하고 각 부위별 건중량을 종속변수로 하는 상대생장식은 고밀도임분의 가지, 저밀도임분의 잎과 종실을 제외하고 상대생장식의 유의성이 인정되었으며(P<0.05), 결정계수($R^2$)의 값은 0.80-0.96 범위였다. 또한 각 임분밀도에 대한 상대생장식(stand density-specific allometric equations)의 회귀계수(slope)에 유의적인 차가 없어(P>0.05), 일괄 상대생장식(generalized allometric equations)의 적용이 가능한 것으로 나타났다. 그러나 현존량 확장계수는 고밀도임분 1.33, 저밀도임분 1.50으로 임분밀도 간 유의적인 차가 있었다(P<0.05). 성숙한 삼나무 조림지의 바이오매스 추정을 위한 상대생장식의 경우 임분밀도의 영향이 크지 않으나 현존량 확장계수의 경우 임분밀도에 따라 상당한 차이가 있었다.

• 한국버섯학회지
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• 제11권1호
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• pp.24-31
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• 2013

선행연구로서 꽃송이버섯 배지내 LED 조명색에 의한 푸른곰팡이 생육억제 효과는 모든 처리구에서 생육이 억제되었으나 blue 처리구에서 푸른곰팡이균의 포자발생량이 매우 높아 꽃송이버섯 배양에 부적합하다는 것으로 확인되었다. 배양 28일 후 LED 파장에 따른 꽃송이버섯의 균사생장 특성과 LED 파장 색상별 배양시간의 경과에 따른 균사생장 특성을 조사한 결과 모두 red 파장 처리구에서 균사생장이 높은 경향을 나타내었다. 이에 따라 red 파장 범위에서 광량을 달리하여 균사생장 조건을 확인한 결과, 광량 세기가 낮은 1.41 ${\mu}mol/m^2S$ 처리구에서 우수한 균사생장을 나타내었다. 계대배양 실시 여부에 따른 균사생장 특성에서는 실험 전 1회 계대배양을 실시한 처리구에서 유의적인 차이를 나타내었다. 배지조성을 달리한 톱밥배지 내 LED 광량별 균사생장은 미송 처리구에서 높은 경향을 나타내었다. 이를 미송 톱밥배지에서 LED red 2.11 ${\mu}mol/m^2S$의 광량을 처리하였을 경우 84일 배양한 처리구에서 유의적인 차이를 보였다. 상기의 결과를 종합하여 보았을 경우 red 파장 2.11 ${\mu}mol/m^2S$ 광량에서 84일 이상 미송 톱밥배지에서 배양하는 것이 꽃송이버섯 배양에 좋을 것으로 판단되었다.

• 생약학회지
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• 제44권2호
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• pp.193-199
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• 2013

We investigated the antioxidative and antimicrobial activities of the methanol extracts from Korean folk plants (MKs) in Chungcheong Province. Among 30 MKs, 16 plants at $100{\mu}g/ml$ showed over 90% scavenging activity of 1,1-diphenyl-2-picrylhydrazy (DPPH) and 30 plants exerted the hydroxyl radical scavenging effect over 55%. Fourteen plants at the concentration $50{\mu}g/30{\mu}l$ showed strong microbial inhibition activity against Escherichia coli and Staphylococcus aureus, with clear zone greater than 11 mm in disc assays. Furthermore, the protective effect against anti-inflammatory system using RAW 264.7 macrophage cell was also studied. The treatment of LPS & INF-${\gamma}$ to RAW 264.7 cell induced nitric oxide (NO), however inhibit the formation of NO less than 50% of 5 plants. The present result indicates that the 30 species of MKs exerts protective effect of oxidative stress, antimicrobial activities and anti-inflammatory. In particular, Rhus javanica and Cornus controversa showed stronger effect on not only radical scavenging activity and inhibits growth of S. aureus but also highest protective effects from inflammation.

• 신재생에너지
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• 제9권4호
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• pp.13-18
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• 2013

Wind turbines should generally be installed at a certain distance from a road to ensure passengers' safety. In Korea, there is no clear guidance as the Ministry of Environment first proposed a road setback distance of 400 m in the Onshore Wind Farm Siting Guidelines draft proposed in July 2012, and then modified it to 1.5 times the height of the wind turbine in October of the same year. This study analyzed the dynamic range of onshore wind resource potential according to how the road setback distance is set using the Korea Wind Atlas with 100m spatial resolution made by the Korea Institute of Energy Research, the transportation network of the Ministry of Construction and Transportation, and the forest road network of the Korea Forestry Service. Owing to the geographical characteristics of Korea, where mountainous terrain accounts for 70% of the total territory, the wind resource potential within 1 km from forest roads are estimated to be 14.3 GW, 14% of Korea's total wind resource potential. In addition, the construction distance of new road for transporting wind turbines from the existing road to a wind farm site is estimated as less than 2 km. Given the limited wind resource potential and geographical constraints, an assessment system that can maximize wind resource utilization and ensure road safety at the same time, and which takes into account the regional characteristics instead of applying the fixed road setback distance across-the-road, is required.

• 한국환경복원기술학회지
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• 제19권2호
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• pp.109-119
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• 2016

In South Korea the need of sustainably managing development on forest lands has required to develop a new approach to estimating environmental impacts on forest surrounding development sites in a scientific manner. As for forest-related development, two types of development were selected: golf courses and industrial complexes. Using Fragstats 4.2, the fragmentation effects and patterns of each type by forest area within project sites and buffer zones ranging from the outside of project sites up to 2,000 meters were analyzed. As a result, golf courses were strongly related to a group of fragmentation indexes: CA, NP, PD, TE, LSI, TCA, NDCA and CONNECT, whereas industrial complexes were associated with CA, NP, PD, TE, LSI and CONNECT. Among them, NP, LSI, TCA and NDCA of golf courses were considered as representative indexes reflecting the average impact ranges of each sub-group by forest area, and focussing on the size of core areas. In the case of industrial complexes, PD, TE and LSI were the representatives, vulnerable to the composition of given landscape. For two case studies, one for golf courses and the other for industrial complexes, they showed there existed a difference between the average of a group and the individual results. Therefore, to minimize the variations in impact range within a group, it is needed to analyze more individual cases. This study proved there was a distinction between project types in terms of the range of environmental impact. To effectively and comprehensively manage forest development, further research on analyzing other development types related to forests with more cases is needed.

• 한국산림과학회지
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• 제84권4호
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• pp.456-464
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• 1995

본 연구는 산림 휴양객의 휴양경험에서 얻는 사회 심리적 이익을 규명하고 수량화 하며 또한 산림 휴양지의 각 속성들이 이들 휴양경험과 어떠한 관계를 갖는가를 알아보기 위하여 수행되었다. 426명의 월악산 국립공원 방문객을 대상으로 직접 설문에 의하여 1995년 5월과 6월에 거쳐 자료가 수집되었다. 자료의 분석결과 9개의 자원 속성과 12개의 사회 심리적 휴양이익이 규명되었다. 또한 이들 자원 속성 변수와 휴양 이익간에는 큰 연관 관계를 가지고 있었다. 본 연구에서 얻은 결과는 휴양자원의 설계 및 관리에 큰 도움을 가져올 것으로 사료되며 특히 휴양자원의 목록화, 관리 기법의 선택, 그리고 휴양자원의 가치 평가에 있어서 통합된 개념으로서의 가치를 인식하는데 큰 역할을 할 것이다.

• Journal of Forest and Environmental Science
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• 제38권2호
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• pp.137-139
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• 2022

In 2021, severely infected trees showing distinct symptoms including branch dieback, necrotic lesions on branches, cankers on the shoots, and dark brown discoloration on the stem on Hovenia dulcis were found in the provincial forest of Jeollabuk-do located in Jangsu, South Korea. The causal agent of the pathogen was identified as Botryosphaeria dothidea based on morphology and sequence comparisons. This is the first confirmed report of B. dothidea causing branch dieback and canker on H. dulcis.

• Journal of Applied Biological Chemistry
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• 제55권3호
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• pp.169-172
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• 2012

The aim of this research was to investigate the antibacterial activity of Clerodendron trichotomum. Antibacterial activities of the n-hexane, methylene chloride (MC), ethyl acetate, and n-butanol fractions from C. trichotomum were tested against Staphylococcus aureus, Escherichia coli, and Helicobacter pylori. The n-hexane and MC fractions showed antibacterial activity against H. pylori at a concentration of 1.7 mg/mL and showed inhibition zones of 10 and 11 mm in disc assay, respectively. Further testing of 22-dehydroclerosterol and ${\beta}$-amyrin (each 3.4 mg/mL) from the MC fraction of C. trichotomum revealed moderate antibacterial effects against E. coli, S. aureus, and H. pylori. In particular, ${\beta}$-amyrin showed clear zones of 12 and 13 mm against E. coli and H. pylori, respectively, suggesting its potential as an antibacterial agent. The active compounds from C. trichotomum might provide a promising therapeutic agent against infections by E. coli, S. aureus, and H. pylori.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.99-99
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• 2018

The major aim of this work is the research of secondary metabolites isolated from the aerial parts of Petasites japonicus. The plant material is extracted with a polar solvent, which is 95% by volume methanol at room temperature. The concentrated extract was partitioned as EtOAc, n-BuOH, and $H_2O$ fractions. From the EtOAC and n-BuOH fraction, two bakkenolides and two caffoylquinic acid were isolated using the Diaion HP-20, silica gel, ODS-A, and Sephadex LH-20 column chromatographies. According to the results of the results of physico-chemical and spectroscopic data including NMR, MS and UV. The chemical structures of the compounds were respectively determined as bakkenolide B (1), bakkenolide D (2), 1,5-dicaffeoylquinic acid (3), and 5-O-caffeoylquinic acid (4). These results suggest that the compounds isolated from the aerial parts of this plant were almost identical with known components of Petasites japonicus. However, it is necessary to investigate more about the difference of amounts of constituents according to harvest area and time.

• Preventive Nutrition and Food Science
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• 제19권2호
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• pp.69-74
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• 2014

The present study investigated the anti-obesity effects of Mycoleptodonoides aitchisonii (MA) in mice fed a high-fat (HF) diet. Two groups were fed either a normal control diet or an HF (45% kcal fat) diet for 12 weeks and three groups were fed an HF diet supplemented with powdered MA (MAP, 1%, 3%, and 5%) for 12 weeks. The anti-obesity effects of MAP supplementation on body weight, fat mass development, and lipid-related markers were assessed. Consumption of an HF diet resulted in increased body weight, serum lipids, relative adipose tissues weight, and liver fat accumulation. However, administration of MAP significantly decreased body weight gain, food intake, food efficiency ratio, hepatic cholesterol level, and adipose tissue weight in a dose-dependent manner. In addition, treatment with MAP significantly reduced the occurrence of fatty liver deposits and steatosis, and inhibited an HF diet-induced increase in adipocyte size. These results suggest that dietary supplementation with MAP exerts anti-obesity effects and indicate that MAP could be used as a functional food to control obesity.