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Urea와 K<sub>2</sub>SO<sub>4</sub> 처리에 의한 복숭아 '미백도'에서 수확 시 과실의 무기성분 농도 및 과피색 변화
문병우,윤익구,문영지,남기웅,이영철,Moon, B.W.,Yoon, I.K.,Moon, Y.J.,Nam, K.W.,Lee, Y.C. 국립한국농수산대학교 교육개발센터 2013 현장농업연구지 = Journal of practical agricultural resear Vol.15 No.1
This study has been conducted to investigate the effect of Urea and K<sub>2</sub>SO<sub>4</sub> treatment at stone hardening stage and 20 days before harvest on soil chemical properties, mineral nutrient concentration and quality of 'Mibaekdo' fruit peach. K concentration after Urea and K<sub>2</sub>SO<sub>4</sub> treatment in soil was increased significantly by Urea 162g+K<sub>2</sub>SO<sub>4</sub> 188g/tree(standard amount) treatment at stone hardening stage, K<sub>2</sub>SO<sub>4</sub> 1.0% tree-spray, Urea 81g+K<sub>2</sub>SO<sub>4</sub> 94g/tree(half amount), Urea 162g+K<sub>2</sub>SO<sub>4</sub> 188g/tree and Urea 324g+K<sub>2</sub>SO<sub>4</sub> 376g/tree(double amount) soil treatment before harvest 20 days compared to control. T-N, K and Ca concentration in leaf was increased significantly by all treatment. but Na concentration in leaf was increased by Urea 0.5% and K<sub>2</sub>SO<sub>4</sub> 1.0% tree-spray treatment before harvest 20 days. T-N concentration in fruit skin was increased significantly by standard amount soil treatment, which decreased by K<sub>2</sub>SO<sub>4</sub> 1.0% tree-spray and half amount soil treatment. T-N, K and Ca concentration in fruit flesh(1~10mm depth flesh from peel) were increased markedly by all treatment excepted Urea 0.5% tree-spray. The leaf weight at harvest was increased markedly by Urea 0.5% tree-spray, standard amount and double amount treatment before harvest 20 days. Fruit weight was increased significantly by standard amount compared to all treatment. Red fruit skin(Hunter a value) progress was effective by K<sub>2</sub>SO<sub>4</sub> tree-spray, half amount and double amount treatment before harvest 20 days. Fruit SSC was increased significantly by Urea 0.5% and K<sub>2</sub>SO<sub>4</sub> tree-spray before harvest 20 days, standard amount treatment at stone hardening stage compared to control.
Runx3 is required for the differentiation of lung epithelial cells and suppression of lung cancer
Lee, K-S,Lee, Y-S,Lee, J-M,Ito, K,Cinghu, S,Kim, J-H,Jang, J-W,Li, Y-H,Goh, Y-M,Chi, X-Z,Wee, H,Lee, H-W,Hosoya, A,Chung, J-H,Jang, J-J,Kundu, J K,Surh, Y-J,Kim, W-J,Ito, Y,Jung, H-S,Bae, S-C Macmillan Publishers Limited 2010 Oncogene Vol.29 No.23
Human lung adenocarcinoma, the most prevalent form of lung cancer, is characterized by many molecular abnormalities. K-ras mutations are associated with the initiation of lung adenocarcinomas, but K-ras-independent mechanisms may also initiate lung tumors. Here, we find that the runt-related transcription factor Runx3 is essential for normal murine lung development and is a tumor suppressor that prevents lung adenocarcinoma. Runx3−/− mice, which die soon after birth, exhibit alveolar hyperplasia. Importantly, Runx3−/− bronchioli exhibit impaired differentiation, as evidenced by the accumulation of epithelial cells containing specific markers for both alveolar (that is SP-B) and bronchiolar (that is CC10) lineages. Runx3−/− epithelial cells also express Bmi1, which supports self-renewal of stem cells. Lung adenomas spontaneously develop in aging Runx3+/− mice (∼18 months after birth) and invariably exhibit reduced levels of Runx3. As K-ras mutations are very rare in these adenomas, Runx3+/− mice provide an animal model for lung tumorigenesis that recapitulates the preneoplastic stage of human lung adenocarcinoma development, which is independent of K-Ras mutation. We conclude that Runx3 is essential for lung epithelial cell differentiation, and that downregulation of Runx3 is causally linked to the preneoplastic stage of lung adenocarcinoma.
Lee, Y.S.,Lim, K.S.,Oh, J.E.,Yoon, A.R.,Joo, W.S.,Kim, H.S.,Yun, C.O.,Kim, S.W. Elsevier Science Publishers 2015 Journal of controlled release Vol.205 No.-
Multipotent mesenchymal stem cells (MSCs) promise a therapeutic alternative for many debilitating and incurable diseases. However, one of the major limitations for the therapeutic application of human MSC (hMSC) is the lengthy ex vivo expansion time for preparing a sufficient amount of cells due to the low engraftment rate after transplantation. To solve this conundrum, a porous biodegradable polymeric microsphere was investigated as a potential scaffold for the delivery of MSCs. The modified water/oil/water (W<SUB>1</SUB>/O/W<SUB>2</SUB>) double emulsion solvent evaporation method was used for the construction of porous microspheres. PEI<SUB>1.8k</SUB> was blended with poly(lactic-co-glycolic acid) (PLGA) to enhance electrostatic cellular attachment to the microspheres. The porous PLGA/PEI<SUB>1.8k</SUB> (PPP) particles demonstrated an average particle size of 290μm and an average pore size of 14.3μm, providing a micro-carrier for the MSC delivery. PPP particles allowed for better attachment of rMSCs than non-porous PLGA/PEI<SUB>1.8k</SUB> (NPP) particles and non-porous (NP) and porous PLGA (PP) microspheres. rMSC successfully grew on the PPP particles for 2weeks in vitro. Next, PPP particles loaded with 3 different amounts of hMSC showed increased in vivo engraftment rates and maintained the stemness characteristics of hMSC compared with hMSCs-alone group in rats 2weeks after intramyocardial administration. These customized PPP particles for MSC delivery are a biodegradable and injectable scaffold that can be used for clinical applications.
Lee, O.K.,Kim, A.L.,Seong, D.H.,Lee, C.G.,Jung, Y.T.,Lee, J.W.,Lee, E.Y. Elsevier Applied Science 2013 Bioresource technology Vol.132 No.-
Chemo-enzymatic saccharification and bioethanol fermentation of the residual biomass of Dunaliella tertiolecta after lipid extraction for biodiesel production were investigated. HCl-catalyzed saccharification of the residual biomass at 121<SUP>o</SUP>C for 15min produced reducing sugars with a yield of 29.5% (w/w) based on the residual biomass dry weight. Various enzymes were evaluated for their ability to saccharify the residual biomass. Enzymatic saccharification using AMG 300L produced 21.0mg/mL of reducing sugar with a yield of 42.0% (w/w) based on the residual biomass at pH 5.5 and 55<SUP>o</SUP>C. Bioethanol was produced from the enzymatic saccharification products without additional pretreatment by Saccharomyces cerevisiae with yields of 0.14g ethanol/g residual biomass and 0.44g ethanol/g glucose produced from the residual biomass. The waste residual biomass generated during microalgal biodiesel production could be used for the production of bioethanol to improve the economic feasibility of microalgal biorefinery.
Introduction of virtual open chamber for testing a weather modification technique in Korea
J-W Cha,K-H Chang,M-J Lee,J-Y Jeong,J-W Jung,H-Y Yang,K-L Kim,Y-C Kim,C-H Kim,K-H Nam,M-K Suk,C-K Jung,H-Y Go,J-H Chae,G-W Lee,Y-H Cho,S-H Jung,H-M Park,Y-A Oh,J-Y Jung,B-G Kim,Y-J Kim,M-H Choi,S-D Ki 한국기상학회 2009 한국기상학회 학술대회 논문집 Vol.2009 No.4