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金英彩,陳鉉五,金洪律,朱榮特 경희대학교 생명자원과학연구원 1997 硏究論文集 Vol.18 No.-
代替에너지 資源의 生産性 增大를 爲해 樹種的 特性을 考慮한 集約 管理 體系의 短伐期林 造成 可能性 判斷 目的에서 遂行되어진 本 硏究에서는 休耕地의 土地 有用 轉換 戰略上 取해진 本質 資源의 綜合的 生産 硏究結果는 다음과 같이 要約되었다. 林內 閉耕沓에서의 自然 稙生 成長된 버드나무의 生産量은 plot 3, 4, 5 等이 높은 産物生産(34ton/ha/yr.)을 보임으로써 代替에너지 資源化에 依해 目的 造成된 林分의 收益 計算은 높게 나타났다. 이때 本質 資源의 生産 收入(289만원/hr/yr.)과 그 外 無機的 資源 生産으로 얻어진 間接 公益 機能 收入(約 2,760만원/hr/yr.)은 매우 높은 것으로 推定되었으며, 休耕地 62,500ha에서 얻어지는 山林 總 收益은 3,049만원/hr/yr.으로 나타나 全體的으로는 約 1조9천4십억원/yr.의 生産 收益을 算定할 수 있다. 以上의 結果는 資源林 造成에 對한 直, 間接的인 經濟 價値 算定으로 볼 때 山林內의 休耕 及 閉耕農地를 利用한 木質에너지 資源의 生産 增大를 爲한 資源林 造成 可能性은 높게 評價되었다. 이에 따라 特別한 環境的 條件을 除外한 對象休耕地에 對해서는 短伐期의 資源林 造成이 可能할 것으로 判斷, 對替에너지 資源林의 轉換 可能性 期待가 높이 나타나고 있다. 이와 같은 結果는 未來의 代替에너지 資源 開發을 爲한 短伐期 資源林을 造成하는 方案硏究에 奇與할 수 있을 것으로 期待되었다. This study was carried out to judge on possibility of application and introduce of forest of short period for exchangeable planting followed by characteristic of species in order to increase productivity of substitution energy resources. First of all, in order to fulfill this study it must be considered that environmental condition above resource production based on land utilization of resting cropland, and productivity of Salix koreensis Anderson grown under natural vegetation condition at closed a rice field forest showed very high(≒34ton/ha/yr.) contrast to each other. Thus, energy resources of planted-stand predicted in come of with woody resource of $3,612/ha/yr. and public in come of $35,840/ha/yr. earned by mineral resource, and the gross forest profit earned and resting cropland(62,500ha) showed $38,112/ha/yr., which will come to about 2.38 billion dollars a year. In view of the results so far achieved, possibility of establishment of energy resource forest at resting and closed cropland in forest predicted the highest in Salix koreensis Anderson stand. Therefore, this study was basic survey to develope future energy resources and compare biomass production with vegetation possibility and growth effect of Salix koreensis Anderson seedlings by environmental condition in natural stand. Based on this results, it must be survey during long time prior to the practice, and predicted possible for concrete a counter plan establishment about creation forest of short period for final cutting to substitution energy through diverse field analysis.
초고압 및 상압에서 POCl₃을 사용하여 제조한 가교전분의 내산성, 내열성 및 내 전단성
최성원,허남윤,김병용,백무열 경희대학교 생명자원과학연구원 2010 硏究論文集 Vol.29 No.-
Starch is an abundant biopolymer in nature that serves mainly as an energy reserve in plants and provides 70-80 % of the total calories consumed by humans worldwide. In the food industry, starch is widely used as macro food ingredients and/or as food additives. However, unmodified native starch has been very limitedly used in the food industry because of their lack of stability under temperature, shear, pH and refrigeration conditions commonly applied to processed foods. Chemical modification of starch is being used to introduce desirable properties in starch for specific applications. The most common type of chemical modification technique is cross- linking. Although many studies have reported the physicochemical properties of cross-linked starch, there have been no reports on non-thermal cross-linking of starch using ultra high pressure (UHP). Unlike conventional cross-linking, non-thermal cross-linking may retain typical physicochemical properties. The objective of this study was to develop a new non-thermal starch modification method using ultra high pressure (UHP) and to evaluate the physicochemical properties of non-thermally cross-linked starch. Com starch was cross-linked with a phosphorus oxychloride (POCb; 0.01 , w/w) at 100, 200, 300 or 400 MPa for 15 min. Acid, Heat and shear resistances of cross-linked starches were investigated. Non-thermal1y cross-linked com starch showed higher acid and heat resistances than native and conventionally cross-\inked com starches. However, shear resistance did not show differences between native, conventionally cross-linked, and non-thermally cross-linked com-starches. Overall, conventionally and non-thermally cross-linked com starches showed similar physicochemical properties. This results indicates that non-thermal cross-linking with POCh by using UHP can reduce the reaction time from 120 min to 15 min compared to conventional cross-linking with POCb.
국내 제조 지베렐린 DF(GA_(3)+GA_(4+7))에 의한 '신고' 배의 숙기촉진
이정명,최성민 경희대학교 생명자원과학연구원 2004 硏究論文集 Vol.23 No.-
국내 제조된 DF(GA₃+GA_(4+7))의 과경 토포처리에 의해서 동양배인 신고의 과실 착색이 촉진되었는데 수확 당시에는 처리간의 현저한 유의차가 인정되었다. 당도는 처리에 따른 일정한 경향을 보이지 않았다. 과육의 경도는 수확 전 3주부터 차이가 나타나면서 수확기에 접근할수록 차이가 커졌으며 수확 당일에는 무처리에 비하여 경도치가 모두 유의성 있게 낮게 나타났다. 아울러 대조구인 ethephon 처리에 따른 지나친 과육 경도치 저하 현상을 저하시키는데에도 효과적이었다. 따라서 과피색(지색)과 과육의 경도치 변화로 판단할 때 숙기촉진의 효과가 인정되었는데 경도면에서 약 10일 정도의 숙기촉진효과가 있었으며 기준량이나 배량처리에서도 약해는 전혀 발생하지 않았다. Fruit maturity of 'Niitaka' pear was significantly hastened by paste treatment of domestic formulation of gibberellin mixture [DF(GA_(3)+GA_(4+7)] to the fruit stalk about 30 to 35 days after full bloom. Significant differences in Hunter b yellow color values were noticed in the fruits of final harvest. Soluble solids contents did not show any significant differences among treatments, Fruit flesh firmness was significantly influenced by DF(GA_(3)+GA_(4+7) treatment, thus confirming the hastening effect of fruit maturity. DF(GA_(3)+GA_(4+7) treatment was also effective in reducing excessive softening caused by ethephon. Based upon the data obtained with fruit skin color and flesh firmness, maturity hastening of about 10 days could be estimated with DF(GA_(3)+GA_(4+7) treatment throughout the experiment.
Molecular Characterization of a gene encoding the Drosophila melanogaster Phospholipase A_(2)
Ryu, Yoon-Seok,Oh, Young-Sang,Yoon, Jae-Sung,Cho, Won-Hwa,Baek, Kwang-Hee 경희대학교 생명자원과학연구원 2004 硏究論文集 Vol.23 No.-
A gene encoding Drosophila melanogaster secretory phospholipase A_(2)(sPLA_(2)) has been cloned and characterized, The coding region of the sPLA_(2) gene was interrupted by a short intron, and codes for a signal peptide of 18 amino acids, followed by a mature protein of 168 amino acids, containing the structural features of group ⅢsPLA_(2). From a Northern blot analysis, about a 1.0-kb Drosophila sPLA_(2) transcript was found to be expressed throughout its development and in both the adult bodies and heads. The recombinant Drosophila sPLA_(2), expressed and purified in Escherichia coli was found to be Ca^(+2)-dependent and maximally active at pH 5.