• Natural Product Sciences
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• 제24권2호
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• pp.115-118
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• 2018

Herein, we reported the phytochemical investigation of whole thallus Sumatran lichen, Stereocaulon graminosum Schaer, and isolated a mono aromatic compound, ethyl haematommate (1). The structure of compound 1 have been established based on spectroscopic data and confirmed by single crystal X-ray structure analysis.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2001년도 추계정기 학술발표회 초록집
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• pp.5-10
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• 2001

It is necessary for governmental supporting polices to collect. management and maintain the genetic resource with respects of diversity of useful natural resource plant and domestic variety for plant industry. There are the main tasks of functional plant industry to develope the techniques of systemic management of genetic resources with sufficient life because of having the key of human's fate with life and death and being the valuable thing to be Investigation. collection and introduction of genetic resource with natural resource plants. Agriculture after WTO is putting an emphasis on the development of functional plants with highly competitiveness In world market under long term and organizing plants Genetic resource of plant in the official institution are maintaining and managing to be possible the regeneration and reproduction if necessary. and utilizing whoever need them.

• 자원ㆍ환경경제연구
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• 제22권2호
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• pp.215-250
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• 2013

"자원의 저주"란 천연자원이 풍부한 국가들이 오히려 경제적으로 낙후되어 있다는 학설이다. 본 논문에서는 기존 연구들과 달리 천연자원 보유 및 생산량이 경제수준과 강한 양(+)의 회귀계수를 보이는 것으로 분석하고 있다. 이러한 결과는 1인당 자본스톡 등 경제성장과 연관된 다양한 설명변수들을 포함시켰을 때에도 유지되고 있다. 이러한 점에서 자원의 저주가 실제로 존재하는 지는 의문이다. 다음으로 천연자원이 경제에 미치는 긍정적인 영향을 통제하고 나서 천연자원 보유 및 생산량에 따른 한 나라의 제도발전 정도를 회귀분석한 결과, 구소련지역 국가들을 포함시키게 되면 선행연구인 Alexeev and Conrad(2009)와는 달리 천연자원 보유량이 제도발전 정도와 음(-)의 회귀계수를 가질 수도 있는 것으로 나타났다. 그러나 이러한 음(-)의 회귀계수는 구소련지역 국가들을 분석대상에서 제외하면 모두 통계적 유의성을 상실하였으며, 통계적으로 유의하지는 않지만 상당수 분석결과에서는 양(+)의 회귀계수도 도출되었다. 즉, 음의 회귀계수는 구소련지역 국가들에 의해 도출된 것이라고 할 수 있다. 이러한 결과는 구소련 지역 국가들의 체제이행기 서방자본의 유입으로 인한 천연자원 보유 및 생산량의 급증과 체제변환에 따른 정치경제적 불안정이 동시에 발생한 때문이며, 일시적이고 다분히 우연에 의한 결과로 추정된다. 따라서 천연자원 보유량이 제도 발전 정도에 부정적인 영향을 미친다는 주장도 그 근거가 다소 희박하다고 하겠다.

• 한국미생물·생명공학회지
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• 제28권6호
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• pp.329-333
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• 2000

Alkaline bacterium producing a high pro-tease activity at low temperature was isolated by using enrichment culture from soil samples and identified as Bacil-lus sp. WRD-1 Cell growth was maximal at 10 hours and the optimal initial pH and culture time of culture condition for enzyme production was pH 7 and 10 hours, respectively. Temperature range of high enzyme activity were $10~40^{\circ}C$. The optimal pH and temperature for the enzyme activity were pH9 and $30^{\circ}C$.

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2001년도 제31회 학술심포지움 및 춘계학술대회
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• pp.71-71
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• 2001

• 한국염색가공학회지
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• 제20권2호
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• pp.1-8
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• 2008

Regenerated composite fibers are prepared from solution(styela clava tunics /poly vinyl alchol) using N-methylmorpholine-N-oxide(NMMO)/water(87/13)(wt/wt) as a solvent by dry-wet spinning. The chemical cellulose (94%, ${\alpha}$-cellulose content) used for this study is extracted from styela clava tunics (SCT, Midduck), which are treated in chemical process and mechanical grinding. The structure and physical properties of regenerated composite fibers were investigated through IR-spetra, DSC, TGA and SEM. The optimal blend ratio of SCT/PVA for spinning solution was 70/30 and the total weight was 4% concentrations in NMMO/water solvent system. The fiber density, moisture contents and the degree of swelling were $1.5(g/cm^3)$ 10.2(%) and 365(%), respectively. The crystallinity index of composite fibers are decreased as the PVA contents increased. Thermal decomposition of composite fibers took place in two stages at around $250^{\circ}C$ and $550^{\circ}C$. The best thermal stability was obtained with 30% PVA contents.

• The Plant Pathology Journal
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• 제18권1호
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• pp.36-42
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• 2002

Resistance of perilla varieties to Botrytis cinerea LVF12 was evaluated, while antagonistic bacteria were selected and tested for their efficacy towards biological control of gray mold rot caused by B. cinerea. Among 11 perilla varieties tested for disease resistance, Milyang variety showed some degree of resistance, while the rest of varieties showed no resistance. Among 250 bacterial isolates collected from perilla loaves and rhizosphere of perilla plants, six isolates showed high levels of inhibitory effect on mycelial growth and conidial germination of B. cinerea in in vitro test. Using the pot test in growth chambers these isolates showed high levels of disease suppression, with Nl isolate showing 95.3% of control value and N4 isolate showing 90.8% of control value. Further test was performed to evaluate the two isolates ability for disease prevention and/or disease therapy, and results showed almost 100% of control vague. Isolates Nl and N4 were identified as Bacillus licheniformis and 5. megatepium, respectively, according to Bergey's manual, API 20E and 50CHB test kit, and Transmission electron microscope.

• 한국염색가공학회지
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• 제20권3호
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• pp.31-38
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• 2008

Regenerated composite fibers were prepared from solution of styela clava tunics(SC) and poly vinyl alchol(PVA) using N-methylmorpholine-N-oxide(NMMO)/water(87/13)(wt%/wt%) as a solvent by dry jet-wet spinning. Structure and physical properties of regenerated composite fibers were investigated through birefrngence, x-ray diffratograms, tenacity, fibrillation and SEM. Optimal blend ratio of SC/PVA for mechanical properties of composite fibers was 70/30 and total weight was 4wt% concentrations in NMMO/$H_2O$ solvent system. Crystallinity index of composite fibers were decreased as the PVA contents increased. Fibrillation of $10{\sim}20wt%$ PVA blended fibers were occurred less than pure SC fiber. Shape of composite fibers were a circle cross section within 10wt% PVA content. But the cross section of fibers were changed as crushed flat with the PVA contents increased.

• 한국가구학회지
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• 제26권1호
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• pp.22-30
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• 2015

In order to prevent decay, distortion, bending, twist on wood products such as wooden furnitures, variety of coating materials were developed and used so far. The coating materials for wood finishing can be synthesized by natural resource or petroleum. However, these coating materials can cause contamination of indoor air quality due to emission of volatile organic compounds (VOCs). In this study, commercialized coating materials for wood finishing such as varnish, coat, and stain were evaluated on emission characteristics of VOCs. Among the varnish, eco-friendly products had about 15~46% lower TVOC emission ($1,042{\mu}g/m^2h{\sim}3,257{\mu}g/m^2h$, respectively, than typical product ($7,100{\mu}g/m^2h$). Natural resource based coating material showed lowest TVOC emission level. However, one of natural resource based waterborne stain showed higher TVOC emission level because waterborne stain already contained higher amount of natural VOC. Oil-based stain might not be suitable for indoor use on interior wall and furniture due to exceed amount of TVOC. Based on results, natural resource based coat or waterborne stain are recommenced to use on wood products.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2003년도 춘계 학술대회지
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• pp.10-16
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• 2003

Natural resource plants have been useful and helpful materials for human to against diseases and Prevention since ancient Egyptian and Roman times. However, according to recent survey, its habitat and indigenous are continuously decreased and almost extinct some valuable species, as Adonis vernalis, Digitalis lanata etc., especially in Eastern Europe and east Asian countries due to radical political and social reforms. ESCOP and FAO have already initiated to protect the endangered species for conservation, protection and propagation technology but it is not easy tasks without global concerning. Most natural resource plants have volatile components in essential oils and its consumption and demanding is increased every year, which contained certain compounds have no side effects and good properties for biological activities. Essential oils of natural resource plants are also well known for medical purposes, such as Central Nervous System (CNS, linalool), anticancer (d-limonene, perillyl alcohol, etc.), microbial and fungicidal activities (menthol, borneol, etc). Essential oil also used for natural therapy to prevent and increase immune systems instead of chemical synthesis drugs. With this, researchers of natural resource plants are ultimately faced to develop and optimal technology for increasing the Korean farmer's income by high added-value herbal products in present and future.