• Journal of the Korean Wood Science and Technology
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• 제44권4호
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• pp.539-550
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• 2016

The objective of this research was to evaluate physical and mechanical properties of three species of Styrax woods from North Tapanuli in Indonesia. The woods were more than 15 years old. Physical properties such as specific gravity, green moisture content, and volume shrinkage were determined by the procedures based on BS-373 standard for small clear specimen. Furthermore, mechanical properties, including modulus of rupture, modulus of elasticity, compression parallel to grain and hardness were also tested according to the standard. Along the stem direction, the edge section had better properties compared with those near the pith section. And the base section had also better properties than upper section. Based on the specific gravity, all of the Styrax woods in this research were classified into III-IV strength classes. A good dimensional stability was demonstrated by the value of the tangential and radial ratio which reached one. With the consideration of the mechanical properties, Styrax woods were suitable use for raw materials of light construction, furniture and handy craft.

• 한국환경복원기술학회지
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• 제9권1호
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• pp.55-63
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• 2006

This study was carried out to analyze community character and classify forest community with phytosociological method and quadrat method to forest of Mt. Busosan in Buyeo-Gun.1. Communities by phytosociological method were classified into Pinus densiflora community and Quercus sp. community. With the classification of TWINSPAN, the community was categorized into Pinus densiflora - Quercus variabilis community and Pinus densiflora - Styrax japonica community.2. The importance value of Pinus densiflora, Quercus acutissima, Prunus sargentii, Styrax japonica, Quercus serrata, Quercus variabilis, Pinus rigida, Quercus aliena in tree layer were 83.20, 41.87, 30.93, 24.85, 23.27, 20.97, 20.28, and 9.46, respectively. The relative coverage of Stephanandra incisa, Quercus serrata, Styrax japonica, Parthenocissua tricuspidata, Rhododendron mucronulatum, Lindera obtusiloba, Prunus sargentii, Quercus variabilis, Indigofera kirilowii, Quercus acutissima, Lespedeza maximowiczii, and Acer pseudosibolianum in shrub layer were 9.62%, 9.55%, 9.18%, 7.85%, 6.18%, 5.25%, 4.82%, 4.15%, 3.98%, 3.98%, 3.55%, and 2.98%, respectively.3. According to size distribution map of diameter breast height of dominant species, the dominant species of Mt. Busosan was Pinus densiflora, and Quercus sp. such as Quercus acutissima, Quercus variabilis, and Quercus serrata may compete with the Pinus densiflora in the future.4. According to the ordination analysis of Mt. Busosan forest, Pinus densiflora - Styrax japonica community was found in moist site and Pinus densiflora - Quercus variabilis community was found in dry site.

• Journal of Microbiology and Biotechnology
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• 제16권3호
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• pp.491-495
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• 2006

Methanol extracts of fruits of 67 plants were screened for in vivo antifungal activity against Magnaporthe grisea, Corticium sasaki, Botrytis cinerea, Phytophthora infestans, Puccinia recondita, and Blumeria graminis f. sp. hordei. Among them, 13 plant extracts ($3,000\;{\mu}g/ml$) showed more than 90% disease-control efficacy against at least one of six plant diseases. Specifically, the extracts of Aleurites fordii, Angelica dahurica, Camellia japonica, Chamaecyparis pisifera, Pittosporum tobira, and Styrax japonica controlled more than 90% of the development of rice blast at $1,000{\mu}g/ml$. Extracts of both S. japonica and A. dahurica fruits at $333{\mu}g/ml$ concentration displayed strong antifungal activity against M. grisea on rice seedlings.

• 한국응용곤충학회지
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• 제51권2호
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• pp.141-148
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• 2012

본 실험은 2011년 전남 구례지역의 산수유, 감, 밤 등에 대발생하여 피해가 심한 갈색날개매미충의 기주식물, 산란특성, 형태적 특징, 생활환을 조사하고 친환경 방제자재 선발을 위하여 수행하였다. 갈색날개매미충의 기주식물은 목본류 32종, 초본류 19종을 포함한 51종이였으며, 산란 선호식물은 산수유, 감나무, 밤나무, 두충나무, 때죽나무였다. 알은 길이 1.24 mm, 폭 0.55 mm 의 장타원형으로 1년생 가지 속에 난괴 당 평균 28.8개의 알을 산란하였다. 약충은 4회 탈피하는데 항문 주변에 x자 모양의 흰색 또는 노랑색 밀납물질을 형성한다. 전남 구례지역에서 연 1세대 발생하며 알로 월동하여 부화시기는 5월 중순~6월 상순, 약충시기는 5월 중순~8월 중순, 성충은 7월 중순~11월 중순이며 알은 8월 중순부터 산란한다. 갈색날개매미충은 산란에 의한 1년생 가지 고사, 양분흡즙으로 인한 생육저해, 그을음병 유발에 의한 상품성을 하락시키는 피해를 준다. 갈색날개매미충 약충과 성충 방제에 효과적인 친환경자재는 고삼추출물제와 천연식물추출물제로 살충율이 80% 이상이었다.

• 생명과학회지
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• 제18권7호
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• pp.974-979
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• 2008

흰가루병은 거의 모든 식물재배에서 나타나며, 다양한 곰팡이에 의해 발병한다. 본 연구에서는 천연물 추출물을 이용한 식물병원성 곰팡이 제어가능성을 검토하기 위해, 보리 흰가루병에서 분리된 Fusarium graminearum을 대상으로 900여종의 천연물 추출물의 항진균 활성을 평가하였다. 먼저 포자 발아억제 활성평가 결과 산초, 당귀, 미국가막사리, 까마중, 오수유, 윤판나물, 미치광이풀, 때죽나무, 백선, 방기, 정향, 멍석딸기, 호장근, 천황련, 작약, 대황, 모란, 달맞이꽃, 대극, 개박하 추출물을 1차 선별하였으며, 균사 생육억제 활성 원재료 확보 용이성 및 실제 적용 가능성 등을 고려하여 산초 추출물을 최종 선정하였다. 산초 추출물 조제 시 methanol 추출이 효율적이며, 순차적 유기용매 분획물의 경우 물 잔류물에서 항진균 활성이 나타났다. 그러나 methanol 추출물에 비해 분획물의 활성이 다소 감소하여 다양한 물질이 보완적으로 항진균 활성을 나타냄을 추측할 수 있으며, 미약하지만 methanol 추출물 및 분획물에서 항진균 활성도 확인하였다. 토마토 묘목을 이용한 산초 추출물의 활성 분획물의 약해평가 결과 $1,000\;{\mu}g/ml$ 농도 처리 시에도 특이한 약해는 나타나지 않았다. 본 연구결과는 F. graminearum에 의해 나타나는 흰가루병 제어에 산초 추출물이 유용함을 제시하고 있다.

• 한국환경복원기술학회지
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• 제10권2호
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• pp.16-25
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• 2007

The purpose of the study is to analyse and classify the characteristics of Gongsanseong forest through phytosociological and quadrat method with 20 plot samples. In result, the forest was classified as Quercus acutissima community. The subcommunity was composed of Quercus aliena and Zelkova serrata. The average vegetation coverage of Quercus aliena subcommunity was upper tree layer (83%), lower tree layer (48%), shrub layer (39%), and herb layer (30%), while the average vegetation coverage of Zelkova serrata subcommunity was upper tree layer (76%), lower tree layer (52%), shrub layer (40%), and herb layer (45%). The order of importance value of the forest community with DBH 2cm above plants was Quercus acutissima (72.62), Quercus aliena (40.52), Prunus sargentii (19.81), Styrax japonica (19.39), Zelkova serrata (15.78), Robonia pseudoacacia (14.76), Quercus variabilis (13.83), Sorbus alnifolia (13.71), Platycarya strobilacea (10.74), Pinus densiflora (10.08), and Quercus serrata (9.31). According to breast diameter analysis results, it is expected that the importance value of Prunus sargentii and Zelkova serrata will be continuously increased while Quercus sp. is dominating the forest. With the result of ordination analysis, the relationship between the forest community and environmental factors could be affected by soil nutrition, moisture, and elevation etc.