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BENSULFURON-METHYL에 대한 耐性選擇 水稻品種의 AMINO酸 造成變化
鞠龍仁,具滋玉 全南大學校 農漁村開發硏究所 1992 農業科學技術硏究 Vol.27 No.-
Bensulfuron-methyl에 耐性 및 感受性으로 選拔되었던 두 水稻品種, Chinsurah Boro Ⅱ(T) 와 IR 1846-281-1-1(S)을 供試하여, 藥處理에 따른 amino 酸 含量과 valine, isoleucine 및 leucine의 含量變動差異를 確認할 目的으로 amino酸 分析試驗을 遽行하였다. 藥處理를 對比한 bensulfuron-methy1 ?~?M 處理에 대한 두 品種의 反應 結果를 要約하면 다음과 같다. -18種 amino酸 總量은 地上部가 地下部의 2培 程度 높았으나 藥處理反應(總量減少)에는 IR 1846이 낮은 濃度부터 민감하게 減少하는 傾向이었다. -藥處理는 含量에 有意的 變動을 한 amino酸으로는 proline을 위시한 여러 種類를 確認할 수 있었다. -耐性보다 感受性品種에서 valine, isoleucine, leucine의 3種 amino酸 減少가 컸으며, isoleucine보다는 valine과 leucine에서 보다 有意的인 減少傾向을 認定할 수 있었다. By use of selected two rice cultivars, Chinsurah Boro Ⅱ as the tolerant and IR 1846-281-1-1 as the susceptible ciltivar to bensulfuron-methyl, the total contents of 18 amino acids, and seperate rate of valine, isoleucine and leucine in shoot and root portion as affected by bensulfuron-methyl treatments in various concentrations were analysed. As the results, the total content of 18 amino acids in shoot portion was 2 times higher as root portion, but no differential tendency in decreasing of contents. Susceptible cv. IR 1846 showed much more sensitive decrease in the contents than tolerant cv. Chinsurah Boro Ⅱ. Many kinds of amino acids including pro line were significantly affected in contents by bensulfuron-methyl treatments. Among specific amino acids, valine and leucine contents were rather significantly decreased by bensulfuron-methyl than isoleucine.
OXYFLUORFEN에 대한 耐性選拔 水稻品種의 脂肪酸 造成差異
具滋玉,鞠龍仁,韓盛旭,千相旭 全南大學校 農漁村開發硏究所 1992 農業科學技術硏究 Vol.27 No.-
Oxyfluorfen에 水稻品種間의 耐性差異를 葉脂質含量 및 脂肪酸造成差異와 關聯解析하기 위하여, 旣히 選拔된 耐成品種(Agabyeo, IR3941, Tabali)과 感受性品種(Mushakdanti, Weld Pally, HP 857-B)을 供試하였다. 이들의 油分含量과 脂肪酸造成特性은 다음과 같았다. 1. 品種 및 品種群間에 葉脂質含量에는 有意的인 差異가 없었다. 2. 脂肪酸造成에는 品種群間에 差異가 있었다. 3. 耐性群은 感受性群보다 myristoleic acid, palmitic acid, stearic acid, erucic acid 含有率이 낮은 반면 linolenic acid 含有率은 높았다. 4. 보다 완전한 耐性關係 解析을 위하여는 alkane系의 造成比 硏究가 要望되었다. The study was intented to interprete the relationships between the differential tolerance of rice cultivar to oxyfluorfen and leaf lipid content or fatty acid composition. Each three rice cultivars(Agabyeo, IR 3941,Tabali as the tolerant and Mushakdanti, Weld Pally, HP 857 as the susceptible)were analyzed. As results, no significant difference in leaf lipid contents were detected among cultivars. However in fatty acid compositions, two groups, namely the tolernat and the susceptible, were clustered with relatively high value in dissimilarity coefficients (1-Q correlation coefficients). The tolerant cultivars showed lower rate in myristoleic, palmitic, stearic, and erucic acid than the susceptible, but higher rate in linolenic acid.
CO₂레이저빔을 이용한 예민화된 Alloy 600의 급속응고 미세구조 연구
김정수,국일현,서정훈,임연수 한국레이저가공학회 1998 한국레이저가공학회지 Vol.1 No.1
A study on microstructural changes of sensitized Alloy 600 which was rapidly solidified by a CO₂ laser beam was conducted using microscopic equipments such as SEM and TEM. Dissolution of Cr-rich carbides and resultant Cr recovery on the grain boundaries occurred in the heat affected zone (HAZ). The microstructure of the laser melted zone (LMZ) having epitaxially solidified from the HAZ was mainly celluar-dendritic with the <100> crystallographic direction of growth. The Cr concentration was observed to increase along the cell boundaries, and tiny particles were distributed along the cell walls with tangled dislocations around them. Cr-rich carbides had been completely melted by the high density of a laser beam, and were not re-precipitated during the matrix solidification due to a fast cooling rate in the LMZ
Structure of $NiSi_2$(111) Surface : An Atomic View
Kuk, Y.,Hasegawa, Y.,Tokumoto, H. 한국진공학회 1993 Applied Science and Convergence Technology Vol.2 No.1
NiSi2(111)을 Si(111) 표면 위에 증착하여 그 구조를 STM으로 연구하였다. 실리사이드는 그 표면이 (1$\times$1)의 구조를 띠고 여분의 trimer를 흡착 분자 구조로 가짐을 관찰하였다. 이 trimer로부터 실리사이드의 두 가지 구조 A, B를 구별할 수 있었다. 표면에 관착된 결함으로부터 표면구조는 내부와 같음을 보였다.