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고효율 효소를 분비하는 균주의 선발 및 신문고지의 효소탈묵 특성(제2보) -Cellulase와 Xylanase를 생산하는 Fungi의 분리 및 선발-
박성철,강진하,이양수,Park Seong-Cheol,Kang Jin-Ha,Lee Yang-Soo 한국펄프종이공학회 2004 펄프.종이기술 Vol.36 No.3
The useful fungi which secret extracellular enzymes was selected for deinking agent of old newsprint. Five fungal strains were isolated from a paper mill soil ground. The CMCase, FPase and xylanase activities of fungi on the liquid culture were investigated at optimal growth conditions. The results of this study were as follow: The optimal pH and temperature for culture growth were 4~8 and 27~$35^{\circ}C$, respectively. For screening of extracellular enzymes at optimal culture conditions the optimal culture period were less than 6-7 days. Fusarium pallidoroseum and Aspergiilus niger which shows relatively higher CMCase, FPase and xylanase activities than the other species were selected for further enzymatic deinking research.
임현아,오승원,강진하,Lim, Hyun-A,Oh, Seung-Won,Kang, Jin-Ha 한국가구학회 2006 한국가구학회지 Vol.17 No.1
This study was carried out to explore a new application of traditional Hanji and obtain fundamental properties for producing Hanji wallpaper by incorporating ceramics from wood and rice-husk as an interior building material. The results of properties determined were summarized as follows: The addition of ceramics in Hanji paper reduced its apparent density, but increased bulk density due to the ceramic particles distributed on the surface and inside the fiber of Hanji wallpapers. In particular, woodceramic particles were specifically distributed on the fiber surface, while particles of rice-husk ceramics were permeated into the inside surface of fibers. The density of rice-husk ceramics were greater than that of woodceramics. The physical properties of Hanji wallpapers, such as breaking strength, wet breaking strength, burst strength, tear index and folding endurance were deteriorated with the addition of ceramics. However, the addition of woodceramics in the Hanji wallpaper resulted in better strength in most cases than that of rice-husk ceramics, except tear strength. Therefore, an optimum addition level of woodceramics into the wallpaper was found to be 5% on the basis of intensity. The addition of ceramics also prolonged the combustion time because it lowered air permeability and brightness of the wallpaper.
Pleurotus ostreatus균 전처리에 의한 볏짚의 상압 바이오 소다펄프화
박헌도 ( Heon Do Park ),강진하 ( Jin Ha Kang ) 전북대학교 농업과학기술연구소 2010 농업생명과학연구 Vol.41 No.2
This study was performed to develop the biochemical pulping method to save the energy and decrease the capital cost in soda pulping. Rice straw was pretreated by Pleurotus ostreatus with either, glucose(G), nitrogen(N) and G+N for 5, 10, 15, 20, 25 and 30 days incubation respectively because of its selective delignification capacity. The total yield of untreated rice straw pulp was 53.5%. In the case of fungal pretreatment, the total yields of pulps showed the ranges of 48.3~28.4%. Consequently, according to the extending of incubation periods, the total yields of pulps were gradually decreased. The Kappa number of pulp made from untreated rice straw was 22.8. In the case of fungal pretreatment, the Kappa numbers were ranges of 26.6~17.4. In case of control and G, the Kappa number were increased until 15 days and in case of N and G+N, also were increased until 20 days. Thereafter, the Kappa number were decreased. In addition, the brightness of pulp made from untreated rice straw was 34.2. In the case of the fungal pretreatment, the brightness of rice straw pulps showed ranges of 28.2~34.9. The brightness were decreased until 15 days, thereafter were increased. The physical properties of soda pulp made from rice straw without fungal treatment, the density, breaking length, burst index, tear index and folding endurance were 0.48g/cm3, 4.82km, 3.37kPa · m2/g, 19.1mN · m2/g and 110 times, respectively. On the other hand, in case of fungal pretreatment, the physical properties of pulps made from rice straw were as follows. The density was 0.50~0.58g/cm3, the breaking length was 4.46~7.18km, burst index was 2.95~5.30kPa·m2/g, tear index was 8.5~18.9mN·m2/g and folding endurance was 8~328 times according to the conditions of nutrients and incubation periods. As a result, if the rice straw would be pretreated with fungi, it is possible to use the condition of atmospheric pressure in soda pulping of rice straw for low grade papers. Accordingly, we can reduce the capital cost and energy consumption in pulp mills where are using the non-wood plants such as rice straw as raw materials.