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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.
SB 410 보일러 및 압력용기용 탄소강 강판의 재질열화 연구
백운봉(U. B. Baek),박종서(J. S. Park),남기웅(K. W. Nam),김호연(H. Y. Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In spite of frequent defect in industrial boilers, life assessment or diagnostic method for them has not been studied. In this research, SB410 carbon steel used in industrial boilers is simulated with artificial aging heat treatment. To do qualitative life assessment, differences in micro-structures and hardness of SB410 by the degradation time are studied. In addition, variation in material properties by aging was observed with the tensile test at room temperature and 179℃ and changes in ductile to brittle transition temperature was observed with the charpy impact test performed at several test temperature.
포도 '캠벨얼리'에서 유기칼슘제 수관살포에 의한 엽병과 과피의 무기성분 농도 및 과실품질
문병우,이영철,남기웅,구자준,정혜웅,Moon, B.W.,Lee, Y.C.,Nam, K.W.,Koo, J.J.,Jung, H.W. 국립한국농수산대학교 교육개발센터 2011 현장농업연구지 = Journal of practical agricultural resear Vol.13 No.1
The effects of organic calcium agent(ECa) tree-spray on the mineral nutrition concentration of petiole and fruit skin and quality in grapevines were studied. The calcium concentration of petiole and fruit skin at harvest in 'Campbell Early' by tree-spray after flowering 14days of calcium agent were increased significantly in calcium chloride 0.4%, ECa 250X and MCa 500X compared to control. The calcium concentration of petiole and fruit skin at harvest by ECa tree-spray after 7 days and 14 days flowering were increased significantly compared to control and 21 days after flowering treatment. Also, The calcium concentration of petiole and fruit skin at harvest by tree-spray of ECa 250X and 125X after flowering were increased significantly compared to control and 500X treatment. Fruit quality, fruit cluster weight, cracking fruit and Bitter rot occurrence by ECa tree-spray of treatment time and concentration different showed no difference between control. Phytotoxicity by tree-spray of ECa concentration different not occur to leaf and fruit.
'캠벨얼리' 포도의 화수(花穗) 생장과 과실품질에 미치는 GA<sub>3</sub>의 영향
이영철,문병우,남기웅,문영지,Lee, Y.C.,Moon, B.W.,Nam, K.W.,Moon, Y.J. 국립한국농수산대학교 교육개발센터 2013 현장농업연구지 = Journal of practical agricultural resear Vol.15 No.1
This study has been conducted to investigate the effect of GA<sub>3</sub> solution dipping treatment after 1 days full bloom on spike growth and fruit quality at harvest of 'Campbell Early' grapevine. The fruit cluster growth(weight, length, width) and fruit stalk(diameter, length) at harvest were increased significantly by GA<sub>3</sub> 10 mg·L<sup>-1</sup> solution dipping treatment compared to control and another concentration. The berry growth (berry No, weight, length, diameter) at harvest showed no difference by treatment GA<sub>3</sub> concentration different. Spike weight was increased by GA<sub>3</sub> 5, 10, 20, mg·L<sup>-1</sup> treatment compared to control, but no difference GA<sub>3</sub> 40 mg·L<sup>-1</sup> treatment. The degree of compact berry, bloom, skin color and SSC at harvest by GA<sub>3</sub> solution dipping treatment were not significantly different from those of control. but increased seedlessness induction by GA<sub>3</sub> 10 mg·L<sup>-1</sup> treatment. The occurrence percent of berry cracking by GA<sub>3</sub> 5, 10, 20, 40 mg·L<sup>-1</sup> treatment significantly decreased. The bitter rot of berry harvest showed no difference by treatment GA<sub>3</sub> concentration different. Total spike length was increased by GA<sub>3</sub> 5, 10 mg·L<sup>-1</sup> treatment compared to control and GA<sub>3</sub> 20, 40 mg·L<sup>-1</sup> treatment. The spike length of 1st from 15th to position increased by GA<sub>3</sub> 10 mg·L<sup>-1</sup> treatment.
정민철,남기웅,오세철,최성민,정윤중 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-
Al-powder as a shrinkage-proof expansion agent was used to prevent crack that caused by dry shrinkge stress of cement mortar. The various sizes of Al powder were used to control the expansion time and the rate because the activity of Al-powder is very high and the generation of vapor is rapidly, produced after mortar cement was mixed, Effect of Al expansion agent on the cement mortar ware carried out by the analysis of expansion rate and compressive strength Compositional and structural characterization of-powders was carried out by scanning electron microscope(SEM) and X-ray diffractometer. The must ideas pattern is showed by the expansion curve of the sample with 0.001wt% A₂-Al additive and the compressive strength of 28 days is appeared that the same sample is the highest value-about 700kg/㎠.