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김강재(Kang-Jae Kim),정진동(Jin-Dong Jung),안은별(Eun-Byeoul Ahn),엄태진(Tae-Jin Eom) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.1
The anti-fungal activity of plant extractives was investigated and the lacquer extractives were selected. The lacquer extractives were coated on anti-fungal paper and confirmed its effect. Water repellency, tensile index and brightness of anti-fungal paper treated with natural extractives were similar to commercial pesticide-treated paper. The incidence of Fusicaladium leuieri MAGNUS of commercial pesticide- treated paper and anti-fungal paper treated with lacquer were similar but, the incidence of Botryosphaeria dothidea (Moug.) Ces & De Not and Gloeodes pomigena of those were increased 10?60 % than commercial pesticide-treated paper.
MicroFibrillated Cellulose(MFC) 제조를 위한 전처리 효소의 활성 및 고해 특성
김강재(Kang-Jae Kim),정진동(Jin-Dong Jung),정수은(Soo-Eune Jung),안은별(Eun-Byeoul Ahn),엄태진(Tae-Jin Eom) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.1
In this study, we evaluated optimum condition of enzyme with pH and temperature for preparation of microfibillated cellulose(MFC). Well-known endo-glucanase, three enzymes were used and CMC was used for substrate. Enzyme activity was evaluated using DNS method and absorbance with UV/VIS spectrophotometer. The enzyme shown the greatest activity was reacted with pulps at optimum condition for 1 hour and treated pulps beated until 100 mL CSF. Enzyme B and Enzyme L was the higher enzyme activity below 0.1% concentration and Enzyme N was the lowest enzyme activity. At various pH and temperature conditions, enzyme activity of Enzyme B was higher than the others at the same concentration. Especially enzyme activity at 50℃ of Enzyme B was almost not changed over pH 6.0. Optimum condition of three enzyme was pH 6 or pH 7 and 50℃or 60℃. Also beating efficiency of enzyme treated pulps with Enzyme B is 55.6%.