• Proceedings of the PSK Conference
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• 2004.10a
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• pp.79-79
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• 2004

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2001.10a
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• pp.32-37
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• 2001

In the present industry, there are necessary to cut not only iron metals but also non-ferrous metals such as aluminum, brass, plastic and wood(Paulownia). therefore it had been made the studies of non-ferrous metals by many scientists. we hope this kind of study will continue. The purpose of this study is to conduct the basic experiment about influencing of change the side rake angle at turning of non-ferrous metals. As the results, the surface roughnesses were on the increase with a increase of side-rake angle at the case of the plastic, brass, aluminum, and paulownia.

• Journal of the Korean Wood Science and Technology
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• v.14 no.2
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• pp.13-20
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• 1986

The effect of heat treatment on the dynamic viscoelasticity of the woods of Picea sitchensis and Paulownia coreana which have been for musical instruments was investigated. The treatment was made in a temperature range of 60-180$^{\circ}C$ for periods of 3 hours to 24 hours. The results obtained are summarized as follows: Moisture absorption decreased with increasing temperature. Dynamic Young's modulus decreased with increasing temperature and hours. Dynamic viscoelasticity decreased with increasing moisture content, but internal friction increased with increasing amount of moisture content.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.884-887
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• 2000

In the present industry, there is not only the cutting of iron metal, but also the cutting of alloy aluminum, brass and plastic to wood(Paulownia). A variety of material is used and these industry is made need of the cutting material but lots of experiments processing is not enough at the moment. At this point, our team processed the basic experiment about influencing of Feedrate and Backrake angle of bite concerned to manufacture in the turning of non-iron metal. Generally speaking, we recognized that there was occurrence of increase of Surface Roughness with increasing of cutting angle in the non-iron metal, but in the cutting of wood we knew, there was special change with change of cutting angle

• Korean Journal Plant Pathology
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• v.12 no.2
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• pp.191-196
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• 1996

위축, 황화, 총생 증상 등 전형적인 병징을 나타내는 phytoplasma에 감염된 식물에서 phytoplasma만을 특이적으로 검출하기 위하여 polymerase chain reaction(PCR) 방법을 이용하였다. Phytoplasma의 16S rRNA gence의 DNA 단편을 증폭하기 위하여 1.4 kb primers (forward, 5` -GTTGATCCTGGCTCAGGATT-3` 와 reverse, 5` -AACCCCGAGAACGTATTCACC -3`)를 사용하여 증폭한 결과, phytoplasma에 이병된 오동나무, 라일락 및 미역취에서는 약 1.4 kbp의 위치에서 특이 band가 검출되었으나 control로 사용한 건전주에서는 어떠한 band 검출되지 않았다. 위의 결과를 재확인 하기 위하여 약 0.5 kb의 primers(forward, 5` -ACGAAAGCGTGGGGAGCAAA-3` 와 reverse, 5` -GAAGTCGAGTTGCAGACTTC-3`)를 사용하여 증폭한 결과, 0.5 kb의 위치에서 특이 band가 검출되었으나 control로 사용한 건전주에서는 어떠한 band도 검출되지 않았다. Phytoplasma에 이병된 식물의 PCR 반응산물을 제한효소인 AluI으로 처리하 sruf과, 오동나무와 라일락에서는 동일한 band pattern을 나타내어 서로 유연관계가 가까운 phytoplasma인 것으로 생각되며, 미역취에서는 이들과는 다른 band pattern을 나타내어 오동나무와 라일락의 phytoplasma와는 유연관계가 먼 것으로 추측된다.

• Proceedings of the Korean Society of Life Science Conference
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• 2001.02a
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• pp.62-62
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• 2001

• Journal of the Korean Wood Science and Technology
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• v.40 no.4
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• pp.229-236
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• 2012

This study was conducted to investigate the effect of gamma radiation on cell wall degradation, cellulose crystallinity, and flexural strength of Pinus densiflrora, Zelkova serrenata, and Paulownia tomentosa. By the gamma radiation at the dose up to 100 kGy, the cell wall degradation was not detected with scanning electron microscope (SEM) observation from all samples, and the flexural strength was not significantly changed. Cellulose crystallinity was neither changed by the gamma radiation. This high stability of wood against gamma radiation means that the radiation technology can be used for eradicating fungal and insect infestation of wood without the changes in wood properties.

• Journal of Forest and Environmental Science
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• v.22 no.1
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• pp.13-17
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• 2006

Approximately each 5 kg dried Paulownia coreana leaves, seeds, outer barks, inner barks and wood were ground, extracted with acetone-$H_2O$ (7:3. v/v). concentrated under reduced pressure and successively fractionated using n-hexane. $CH_2Cl_2$, EtOAc and $H_2O$ on a separation funnel. Each fraction was then freeze dried and weighed. The extraction yield of each sample was investigated and the yield of inner barks was the highest, while the wood was the lowest. Antioxidative activities of crude extracts, precipitates and partitioned fractions were evaluated by DPPH radical scavenging method. The results indicated that all EtOAc soluble fractions, including some of $H_2O$ soluble fractions, showed significantly high antioxidative potential compared with ${\alpha}$-tocopherol and BHT used as controls.

• Journal of the Korean Society of Costume
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• v.60 no.5
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• pp.71-87
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• 2010

The purpose of the study is analyzing Japanese modern costume, through examining legislation process and the relics of Chickimkwan's and Juimkwan's court costume. The results of the study are as follows. First, the proposer of civil court costume, established in 1872, was Iwakura Mission dispatched to America and Europe. The Mission realized the importance of preparing western-style costume in civilization from experience wearing traditional clothing at ceremony of presenting credentials in America. Afterwards, the Mission proposed that the government accept western-style as civil court costume and became first wearers in Japanese in England. Second, the difference, between ordinance and actual clothes worn by Iwakura Mission, occurred in process of legislation in 1872. That might be considered as trial and error in introducing different culture. The coexistence of England and French styles was unified into French style by the revision of civil court costume in 1886. Third, the pattern of paulownia embroidered on civil court costume was utilized as symbol of Japan. While the costume of Chickimkwan was embroidered by the pattern of 7 and 5 leaves paulownia, that of Juimkwan was 5 and 3 leaves expressing their grades. Fourth, relics research showed how formed manufacturer information and enacted design were in embroidery. The relics seemed to be manufactured in Japan, because emblem of Mitsukosi tailor was embroidered on inner part of the back of collar of Chickimkwan in Nara Women's University, Japan and that of Yamasaki on left inner pocket of Juimkwan in the Independence Hall, Korea. The embroider techniques comprised forming by filler particles according to the design, filling up coiled gold threads and expressing stem with gold threads and spangles. As preemptive study, establishment process of Japanese civil court costume in this study will help understand form characteristics appeared in civil court costume act of Korean Empire.

• Journal of Conservation Science
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• v.36 no.4
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• pp.255-263
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• 2020

Paulownia coreana has various advantages as a convenient workability, aesthetic outlook, beautiful patterns, low weight and high strength, and its permeability. P. coreana has been widely used for storage but there are no empirical researches proving its functionality in a field of conservation science until now. In this study, the seasonal and daily temperature and relative humidity control, and microbe and insect repellent activity were evaluated under the controlled and uncontrolled circumstances from 2015 to 2016. The results showed to be mainly excellent in relative humidity control and the buffering effect was good to adjust the average daily relative humidity range from the outside. With respect to the antimicrobial properties of P. coreana, we observed that its water-soluble extract produced visible zones of inhibition against five bacteria. However, it was difficult to predict the antimicrobial and/or insecticidal properties.