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장준복 중부대학교 자연과학연구소 2001 自然科學硏究論文集 Vol.10 No.1
The perpose of this work were, 1) to find the most effetive solvolysis conditions and method for the delignification of wood, 2) to find out the changes of carbohydrate and property of pulp and water soluble under the phosphoric acid as a catalyst, solvolysis cooking, Pine(Pinus densiflora) wood was cooked with cresol and water mixture solvent under organic acid as a catalyst. The results were summarized as follows; Addition of 0.1% phosphoric acid as a catalyst, rate of delignification and degradation of carbohydrate of pine chips were increased with concentration of phosphoric acid. In the case of more than 1.0% phosphoric acid addition, pine chips took place more degradation of carbohydrate than delignification. In the case of phosphoric acid addition as a catalyst, the most effective condition for separation of wood components were appeared 0.1%, 190℃, 60 minutes and liquor ratio (cresol:water) was 7:3.
장준복 中部大學校 自然科學硏究所 1999 自然科學硏究論文集 Vol.8 No.1
크레졸,물 혼합용제에 개미산을 촉매로 첨가하여 소나무(Pinus densiflora)와 굴참나무(Quercus variabilis)를 증해하여 개미산을 촉매 첨가에 따른 증해과정중에 일어나는 목재중 탄수화물의 거동과 탈리그닌율 및 최적 증해조건을 검토하였다. 개미산을 촉매로 첨가하면 탈리그닌도 촉진되지만 탄수화물의 분해도 심하게 일어났다. 특히 가수분해된 단당류의 2차적 변질을 촉진시켜 수층 용출 당류의 함량을 감소시켰으나 순도 높은 cellulose를 얻을수 있었다. 증해액에 용출하는 당류는 대부분 올리고당으로 존재하고, 일부만 단당류 형태로 존재하였다. 개미산을 촉매로 첨가하는 경우 최적 증해조건은 190℃, 60분, 개미산 농도 1.0%로 증해하는 것이 가장 좋은 조건으로 나타났다. This studies were carried out to find 1) the most effetive solvolysis condition and method for the delignification of wood, 2) to find out the changes of carbohydrate and property of pulp, water soluble sugar under the formic acid catalyzed solvolysis cooking. Pine(Pinus densiflora) and oak (Quercus variabilis) wood were cooked with cresol and water mixture solvent under formic acid as a catalyst. The results were summarized as follows: Addition of formic acid as a catalyst, not only delignification of wood accelated but also degradation of carbohydrate, especially monosaccharide content in water solubles decreased, and obtained high purity cellulose. Sugar of water solubles were mainly composed of oligosaccharide. The most effective condition of solvoysis cooking under the formic acid as a catalyst were 180℃, 60min., concentration of formoc acid was 1.0%.
장준복,김승보,이경섭,조정훈,Jang, Jun-Bock,Kim, Seung-Bo,Lee, Kyung-Sub,Cho, Jung-Hoon 한방비만학회 2002 한방비만학회지 Vol.2 No.1
Objectives: To compare the body composition of the postpartal female weight-gained over the recommended during pregnancy with that of normal female with same age. female diagnosed as obesity and postpartal female weight-gained within the recommended during pregnancy. Methods: From Apr. 1. 2001 to Feb. 28. 2002, there were 745 delivery in Dept. of Obstetrics & Gynecology, Kyung-Hee Medical Center. 32 mothers of them wanted to be investigated about the weight gain during their pregnancy. We excluded 12 persons who had gained within the recommended weight$(15{\beta}{\prod})$ and had diagnosed as the diseases inducing pathologic edema, preeclamsia. gestational heart or renal diseases, for example. In 2 days after delivery(nomal) or 5 days after(Caesarean section) we analysed the body composition of 20 persons. Results: 1. Compared with normal female, body weight, body mass index and body fat of the women gained over the recommended were increased and there made alternation to the increase of the percentage of body fat or the decrease of the percentage of lean body mass. 2. Compared with obese women who had same body mass index, the women gained over the recommended showed a little increase of body fluid, protein and mineral, but had a little decrease of the percentage of body fat. 3. The percentages of body fat increased with the women gained over the recommended, the women gained within the recommended and the obese women in order. This could imply the relation between the pregnancy, weight gain during pregnancy and the obesity. 4. The weights before pregnancy were same in the women gained over the recommended and the women gained within the recommended. But the weights just after delivery kept the gap happened during pregnancy between them and its main cause was the increase of body fat. Conclusions : The women gained over the recommended during pregnancy experienced the chage of body composition and its main cause was the increase of body fat. So compared with the women gained within the recommende, postpartal obesity more frequently could happen.
장준복,양재경,임부국,이종윤 한국목재공학회 2004 목재공학 Vol.32 No.1
본 연구는 폐지로부터 용액화물을 제조하고, 제조된 용액화물의 성분 분리 및 성상분석을 통해 용액화물의 효율적인 이용방안을 위한 기초자료 제공에 그 연구 목적이 있다. 폐지의 액화에 있어 건식해리된 폐지보다 습식해리된 폐지의 액화가 비교적 용이하였으며, 이러한 이유는 습식해리된 폐지의 약품 침투가 비교적 용이하기 때문으로 판단된다. 폐지의 최적 액화조건은 폐지 1g에 대해 크레졸 2㎖, 물 4㎖, 인산 0.5㎖로 첨가하여 190℃에서 60분간 액화 시킨 조건이 가장 우수하였다. 폐지 액화물 중 리그닌은 용제인 크레졸 층으로, 탄수화물은 수층으로 용해되어 각각 분리되며, 두 성분의 분리·회수는 비교적 용이하였다. 액화 폐지 중의 리그닌은 80% 이상 회수되었고, 회수된 리그닌의 분자량은 1,000 정도의 저분자량을 나타냈었다. This research was carried out to investigate the component isolation method from liquefied waste paper. and isolated component was analyzed by molecular weight distribution with gel chromatography and nitrobenzene-oxidation analysis. In the aspect of liquefaction ratio, wet defibration fiber are better than dry defibration fiber because of wet defiberation fiber was easy to access of chemical solution. The optimal liquefaction condition of waste paper was treated at 190 C for 60 min(creso1 2 me, water 4 me, phosphoric acid 0.5 ㎖ based on waste paper 1 g). In the liquefied waste paper, lignin and carbohydrate were separated with two interfacial layer(creso1 layer, water layer). In the chemical analysis of isolated lignin, molecular weight distribution of isolated lignin was below 1,000.