• 보존과학회지
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• 제37권6호
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• pp.712-722
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• 2021

본 연구의 목적은 박락과 오염이 심하여 보존 상태가 좋지 않은 치성광여래 무신도에 대한 과학적 조사를 기초로 보존처리를 진행한 논문이다. 연구 방법으로는 상태 조사와 과학적 장비를 이용하여 무신도의 재질과 제작 방법을 파악하였다. 사용 장비로는 색차계와 실체현미경 그리고 휴대용 현미경, P-XRF, FT-IR, SEM-EDS를 이용하여 배접지와 바탕재의 종류와 채색 안료 성분분석을 하였다. 분석결과 배접지는 펄프지, 바탕재는 합성섬유인 폴리에스테르로 확인되었다. 또한 사용 안료는 적색 안료인 연단[Red Lead, Pb₃O₄], 백색 안료인 호분[Oyster Shell White, CaCO₃]을 제외하고 나머지는 합성안료로 확인되었다. 또한, 19세기 후반 무신도에서 주로 확인되는 녹색안료인 에메랄드그린[Emerald Green, Cu(C₂H₃O₂)₂·3Cu(AsO₂)₂]이 검출되었다. 이와 같은 분석을 통하여 확인된 재질 및 안료를 사용하여 치성광여래 무신도의 보존처리를 진행하여 보존하고자 하였다.

• 한국포장학회지
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• 제30권1호
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• pp.73-83
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• 2024

In this study, environmental evaluation of high barrier coated paper (coating layer/paper) packaging is conducted in comparison with conventional aluminum laminated (PET/VMPET/LLDPE) plastic packaging. The target product for this packaging is a KF94 mask, which requires a high barrier of water and oxygen to maintain the filtration ability of the mask filter. The functional unit of this study is 10,000 mask packaging materials based on a material capable of blocking oxygen (<1 g/m²day) and moisture (<3 g/m²day) for the preservation of KF94 masks. In order to understand the results easily, paper-based mask packaging system divided into 6 stages (pulp, pulping & paper making, calendaring & coating, printing, packing and waste management), while plastic-based mask packaging consists of 5 stages (material production, processing, printing, packing, waste management) In case of paper-based mask packaging, most contributing stage is calendaring & coating, resulting from heat and electricity production. On the other hand, plastic-based mask packaging is contributed more than 30% by material production, specifically due to linear low density polyethylene and purified terephthalic acid production. The comparison results show that global warming potential of paper-based mask packaging has 32% lower than that of plastic-based mask packaging. Most of other impact indicators revealed in similar trend.

• 공업화학
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• 제9권4호
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• pp.529-535
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• 1998

탈묵공정에서 고지 배합처리, 온도, 양품 배합처리 등의 해리 공정조건 변동에 의한 탈묵펄프의 영향을 조사하였다. 실험계획법으로써 탈묵펄프에 주된 영향을 미치는 유의한 인자를 선정하였으며, 통계분석기법 중 하나인 분산분석 및 다중비교를 통해 공정조건의 최적수준조합을 결정하고 이에 따른 백색도 및 강도적 특성의 추정치 및 신뢰구간을 구하였다. 백색도는 $Na_2SiO_3$ 2.0%, $H_2O_2$ 0.5%, 고지 배합처리 (국내신문고지 : 수입신문고지 : 매거진 = 40 : 30 : 30 wt %)의 조건에서 가장 높은 추정치 50.5%와 90% 신뢰구간 (49.0, 52.0)을 얻을 수 있었다. 인장지수는 $H_2O_2$ 0.5%, 해리 온도 $50^{\circ}C$의 조건에서 가장 높은 추정치 $35.7N{\cdot}m/g$과 90% 신뢰구간 (34.6, 36.6)을 얻을 수 있었다. 파열지수는 계면활성제 0.1%, 해리 온도 $50^{\circ}C$의 조건에서 가장 높은 추정치 $0.129kPa{\cdot}m^2/g$과 90% 신뢰구간 (0.125, 0.133)을 얻을 수 있었다.

• Macromolecular Research
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• 제10권3호
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• pp.140-144
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• 2002

Dispersion polymerization of acrylamide was carried out in the media of methyl alcohol/$H_2O$ mixtures using hydroxypropyl cellulose and ammonium persulfate as steric stabilizer and initiator, respectively. The effects of concentrations of initiator and steric stabilizer, amount of monomer, polymerization temperature, methyl alcohol/$H_2O$ ratio, and purification of monomer and nitrogen purge on the particle size of the latices and molecular weight of the polymers were investigated. The average particle diameter increased with increasing concentration of initiator, water content in methyl alcohol/$H_2O$ media, and polymerization temperature, but decreased with monomer and stabilizer concentrations. The viscosity average molecular weight increased with increasing concentrations of monomer, steric stabilizer, and water content in dispersion media, but decreased with initiator concentration and polymerization temperature. The PAM polymers prepared with the purified monomer and the nitrogen purging before the reaction showed the highest molecular weight.

• Journal of Applied Biological Chemistry
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• 제51권2호
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• pp.57-60
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• 2008

Eight compounds, including 2 flavones, luteolin (1) and apigenin (2), 2 flavonols, kaempferol (3) and quercetin (4), and 4 flavonoid glucosides, luteolin-7-O-${\beta}$-D-glucoside (5), apigetrin (6), astragalin (7), and isoquercitrin (8), isolated from the whole herb of Sonchus oleraceus L. were analyzed on the basis of chemical and spectroscopic evidence. This was the first time to report compounds 3, 4, 6, 7 and 8 from the Sonchus oleraceus L. The antioxidant activities of the isolated flavonoids and their glucoside derivatives were evaluated by DPPH free radical-scavenging assay, showing that compounds 1, 3, 4 and 8 exhibited stronger antioxidant activities compared with ${\alpha}$, tocopherol and curcumin. Flavonoids containing more hydroxyl groups exhibited better antioxidant activities. The antioxidant activity of flavonols was superior to their corresponding flavones, and that of aglycone are more potent than their glucoside derivatives.

• Journal of the Korean Wood Science and Technology
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• 제26권4호
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• pp.86-91
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• 1998

The drainage was used to determine the specific filtration resistance for wood and non-wood fibers. The drainage rate is also affected by factors that can be changed on consistency, pressure drop across the mat, basis weight, additives, and viscosity. Recent development of theoretical studies in flow through porous media and filtration operation emphasize the urgent need for more accurate data for porosity and specific filtration resistance. This study was investigated to determine specific filtration resistance of Hw, Sw-BKP and Kenaf fiber by filtration experimental. Freeness levels selected were 150,250,and $350m\ell$ CSF. The average specific filtration resistance decreased as freeness increased and resistance of Sw-BKP was greater than that of Hw-BKP. The filtrate and porosity increased and specific filtration resistance decreased as particle size of fiber increased.

• 기술혁신학회지
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• 제8권1호
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• pp.209-219
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• 2005

o Korea consumed total 198.5 million TOE and the portion of crude oil n was 100.4 million TOE in 2002 which marked the 10th largest energy consuming country and ranks the $4^{th}$ crude oil consumer in the world. o Industries consumed 51.5% of the total energy and 93% of industrial energy was used at the manufacturing industries such as steel, textile, chemical, food and beverage, pulp and paper, and timber industries, which lead to energy intensive industries numbered 110,000. o Also Korea ranks the $10^{th}$ greenhouse gas emission countries of the world (134.9 million TC) which may cause Korean industries to suffer severely during the implementation of United Nations Framework Convention on Climate Change (UNFCCC). o Therefore, the target of the study is to develop a model for the analysis and design of industrial complex by integration of the energy usage and environmental problems. o The research work contents are as followings: -Analysis of Korea energy consumption -Concept of the integration of energy and environment problems - Basic concept of industrial complex planning - Case study (1) - Recommendation and conclusion

• 한국가구학회지
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• 제23권2호
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• pp.214-221
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• 2012

Sustainable energy consumption and increasing $CO_2$ emissions stimulate Eco-friendly industry. Wood has positive various properties as alternative energy such as solar, wind and water. Wood provide lumber, pallet, paper, pulp and fuel through production process. Even Korea republic has 63.7% of forest rates, weather condition makes low forestry production capacity. For utilization of domestic small diameter log needs study mechanical properties. In this study, various properties tested on domestic Japanese Larch small diameter lumbers and make mechanical properties table for allowable stress calculation. Result of compressive test, allowable compressive stress is 13 MPa. Allowable bending stress is 12 MPa.

• 환경위생공학
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• 제18권4호
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• pp.1-5
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• 2003

For studying out the method of the effective purification of waste waters such as dying, paper pulp and plating wastewater, we measured the COD removal efficiency, color and turbidity of those pollutants by the physical and chemical method using the Inorganic Coagulating Agent (CM, RM) and a High Voltage Generator. The COD removal efficiency measured when applying the Inorganic Coagulating Agent (CM, RM) was mush higher than that using the Existing Coagulating Agent In addition to, when using those two methods above mentioned at the same time, both the COD removal efficiency and the reduction-effect of the inserting quantities of Coagulating Agent were higher than those were used singly. The system using both an Inorganic Coagulating Agent and a High Voltage Generator will be useful in various fields of wastewater treatment.

• Journal of Microbiology and Biotechnology
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• 제10권4호
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• pp.462-469
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• 2000

Sixty-one strains representing the main genera of wood-decaying xylariaceous fungi (mainly in Daldinia, Hypoxylon, Kretzschmaria, Rosellinia, Penzigia, and Xylaria) were tested for their ability to produce ligninolytic enzymes. The phenol oxidase activity and fungal growth of the xylariaceous fungi on gallic aicid and tannic acid media showed a variation in their ability to degrade lignocellulose. A number of species showed equal 개 betterligninolytic enzyme activities than Coriolus versicolor, a known basidiomycete wood-degrader. A large variation of the enzyme activity was observed by individual strains as well as a substantial variation between the isolates of the same species. The most frequent ligninolytic enzymes were peroxidase and general oxidase. With 19% of the strains tested, peroxidase showed the strongest ligninolytic enzyme activity, while tyrosinase activity was detected only in 7% of the strains. All strains of Kretzschmaria and Rosellinia tested was positive for laccase. Xylariaceous fungi were able to degrade the macromolecule, lignin, using each specific ligninolytic enzyme in the specfic lignin degradation pathway.