Genome-wide transcriptome analysis of rice genes responsive to chilling stress

Cho, Hyun Yong,Hwang, Sun-Goo,Kim, Dong Sub,Jang, Cheol Seong Canadian Science Publishing 2012 Canadian journal of plant science. Revue canadienn Vol.92 No.3

<P> Cho, H. Y., Hwang, S.-G., Kim, D. S. and Jang, C. S. 2012. Genome-wide transcriptome analysis of rice genes responsive to chilling stress. Can. J. Plant Sci. 92: 447-460. Low temperature is known to be one of the major challenges to rice production. We have selected chilling-tolerant TILLING of Donganbyeo, which showed significantly vigorous growth relative to wild-type plants under chilling stress conditions (10-12°C). We performed a comparative transcriptome analysis using a chilling-tolerant line and wild-type plant with the objective to evaluate genomic responses to chilling stress and to identify chilling inducible genes. Functional enrichment analysis results demonstrated that a large proportion of chilling-inducible genes were associated with certain biological pathways, e.g., monosaccharide catabolic processes, reflecting the energy requirements necessary for adaptation to sub-optimal temperatures in plants. Extremely low correlation coefficients in a range of −0.07 to 0.04 were detected between plant responses to chilling stress and different abiotic stress conditions such as drought, salt, cold, and heat; these results imply that plants might exploit strikingly different response mechanisms against stress conditions. The largest subnetwork, which was composed of 78 chilling-specific inducible genes, was found in the tolerant plants, but not in the wild-type plants, which probably implies the existence of a delicate and harmonious signaling pathway setup in the tolerant plants. Expression patterns of 20 chilling-responsive genes were assessed via abiotic stress treatments and phytohormone treatments. About 80% of the tested chilling-inducible genes were upregulated by exogenous abscisic acid (ABA) treatment. The results of this study may prove useful in elucidating the chilling-response pathway and in the development of chilling-tolerant rice varieties. </P>

대기압 스트리머 코로나방전특성 및 이산화탄소 전환특성

조문수,김학규,곽동주,신용섭 경성대학교 공학기술연구소 2001 공학기술연구지 Vol.8 No.-

Deep interests have been paid on the application of non-thermal plasma technique th solve the environmental pollution problems. CO_2 is one of the severe pollutants which cause the acid rain and global warming. In this study, in order to improve the conversion efficiency of CO_2, the streamer corona discharge plasma and barrier discharge plasma reactors were made, and the conversion characteristics of CO_2 by the corona discharge plasma and some discharge characteristics of these discharge chambers are studied experimentally.

個人用 컴퓨터를 위한 標準 그래픽 시스템의 設計

趙東燮,李相縞 梨花女子大學校 韓國生活科學硏究院 1986 韓國生活科學硏究院 論叢 Vol.37 No.-

이 논문에서는 BASIC 언어를 대상으로 컴퓨터 그래픽 분야에 있어서의 표준화에 관하여 연구하였다. 사용 언어는 Apple Ⅱ 개인용 켬퓨터의 호환 기종에서 실행되는 Apple-BASIC이며 표준화 기법으로 입력된 프로그램이 컴퓨터에 의하여 처리되기 전에 먼저 전처리(pre-processing)되는 방법을 제시하였고, 전처리를 수행하는 그래픽 표준화 처리 프로그램을 설계하였다. 또한 그래픽 표준화 처리 프로그램을 사용한 예를 통하여 그래픽 표준화 처리를 위한 명령의 실행 과정을 설명하였으며, 아울러 프로그램의 구성상의 특징인 구조화 BASIC에 관하여 연구하였다. One of the major issues in computer graphics is the standardization of graphics primitives. This paper describes the graphics primitives and proposes the design and implementation of graphics systems for personal computers. Our primary objective is to design the programming language used as a graphics language. The second is to implement such language by using personal computers. Graphics primitives are preprocessed to obtain the hardware dependent routines. All of the graphics primitives are so large. Thus, the model we have developed on personal computers ignores the 3D primitives. Several examples show the preprocessing of the given graphics primitives and their validities.

잡상 성분을 포함한 한글문자 인식

조동섭,장선영 梨花女子大學校 韓國生活科學硏究院 1992 韓國生活科學硏究院 論叢 Vol.50 No.-

Character recognition is one of the fundamental steps in the research area of computer vision. This paper proposes a new technique for the recognition of presegmented Hangul characters. Unlike the early works which are sensitive to noise and shift variation, the proposed approach applying the general two dimensional convolution to learning patterns is rather insensitive to the input images. In this paper, Hangul recognition based neural network is implemented. Experimental recognition rate is compared in two ways of learning ; with-convolution and without-convolution learning. In our experimental result, Hangul recognition using the prior optimal convolution learning gives a better recall and less sensitive to the input noises.

몇가지 제일전이금속-폴리에틸렌이민 착물의 합성과 성질

김동수,박정학,조태섭 嶺南大學校府設 基礎科學硏究所 1983 基礎科學硏究 Vol.3 No.-

Cr(Ⅲ), Co(Ⅱ), Ni(Ⅱ) and Cu(Ⅱ) complexes with polyethyleneimine(PEI) as ligands have been prepared in absolute ethanol, and the structures of the complexes were chracterized by reflectance and infrared spectra. The structures of obtained complexes were pendant-type and polymer chelate type. [Cr(H₂O)₄ CI(PEI)CI₂] with pendant-type was insoluble in organic solvents, acids, DMF and DMSO, another complexes, [Co(PEI)]CI₂ [Ni(PEI)]CI₂ and [Cu(PEI)]CI₂ with polymer chelate were soluble in water. Especially, in aqueous solution, chlorides of [Ni(PEI)]CI₂ was substituted by H₂O.

Polyelectrolyte-Metal(II) Ion간의 착물화(제5보) . Cu (II)-Glycine-Poly(ethylene imine)상성분계 고분자-금속착물의 착생성

金東洙,曺泰燮 嶺南大學校附設 基礎科學硏究所 1986 基礎科學硏究 Vol.6 No.-

The temporary acid dissociation constants (pK'?) of GlyH-BPEIH? mixed ligand were determined by pH titration method at 30℃ in 0.1M KCl. Obtained constants were increased with BPEIH?/GlyH mole dration decreasing, and experimental constant n valued were decreased with mole ratio decreasing. Stability constants of ternary complexes, Cu(II)-Gly-BPEI were lager than the binary complexes and the constants were increased with BPEIH?GlyH mole ratio decreasing. The visible absorption spectra were confirmed that Cu(II)-Gly-BPEI, the ternary polymer-metal complexes, coordinated to six coordinating site by ligands of BPEI and Gly.

Polyelectrolyte-Metal Ion의 착물화(제6보). 수용액 중 Poly(vinyl alcohol)과 Uranyl Ion간의 평형에 관한 연구

김동수,엄창중,조태섭 嶺南大學校附設 基礎科學硏究所 1988 基礎科學硏究 Vol.8 No.-

The stability constants for the complex formation of poly(vinyl alcohol) with uranyl ion, in an aqueous solution, have been determined in terms of pH titration method by a modified Bjerrum method propposed by Gregor and co-worker. The formation curves of the complexes in the system of ionic strength 0.1(KCl) at 30℃, showed that four hydroxy groups combine with uranyl ion, and the complex formation increases abruptly around ph4.5, region. The numerical values of overall stability constants(logβ) were 18.39 and 17.93 at 5.0 and 10.0 mole ratio of PVA/UO₂?, respectively.

Branched Poly(ethylene imine)과 Glycine의 혼합 리간드에 의해 생성되는 Nickel(Ⅱ)착물의 안정도 상수

金東洙,曺泰燮 嶺南大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.13 No.-

The stability constants of the mixed ligand complexes that indicate branched Ploy(ethylene imine) and glycine, were determined by potentiometric titration at 30℃ and I=0.1M KCl. The stabiliy constants were calculated from the Bjerrum and modifed Bjerrum methods. The over all stability constants (log β₃) of mixed ligand complexes of Ni(Ⅱ) were 21.10 by the Bjerrum method and 20.70 by the modified Bierrum method. The values of over all stability constants from the Bjerrum method were in good agreement with the modified method, in spite of different from the calculation methods of the stability constants.

단위체와 고분자 리간드를 포함하는 Cu(Ⅱ) 착물의 과산화수소 분해반응에 대한 촉매 활성도

김동수,조태섭 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-

[Cu(en)₂PEI]SO₄and [Cu(en)PEI]SO₄type polymeric complexes of octahedral form were prepared from ethylenediamine(en)-Cu(Ⅱ) complexes and polyethyleneimine(PEI) by procedure similar to that reported for the preparation of[Ni(PEI)]Cl₂. Moreover, their catalytic activities in the decomposition reaction of hydrogen peroxide were compared with those of corresponding square planer monomeric complexes[Cu(en)₂]·SO₄and [Cu(en)(H₂O)₂]SO₄; it was found that their activities decrease in the following order: [Cu(en)₂PEI]SO₄??[Cu(en)₂]SO₄??[Cu(en)PEI]SO₄>[Cu(en)(H₂O)₂]SO₄

고분자-금속착물(Ⅳ)ㆍPolypropyleneimine-Ni(Ⅱ) 착물의 촉매활성도

金東洙,曺泰燮,石元慶,朴正學 嶺南大學校附設 基礎科學硏究所 1982 基礎科學硏究 Vol.2 No.-

이상의 실험결과로 보아 중합체 리간드 사슬에 치환기가 있거나, 분자량이 큰 중합체 리간드는 금속착물의 촉매작용을 증가시키는 것을 알 수 있으며, 치환기의 크기를 변화시키거나 증합체의 분자량을 조절함으로써 금속착물의 촉매작용을 조절할 수 있다는 것을 알 수 있다. 메틸기보다 더 큰 알킬기(에틸,n-프로필 등)를 가졌거나 여러가지 분자량을 가진 중합체 리간드로 된 금속착물의 합성 및 촉매활성도 조사가 현재 진행중에 있으며 이 실험결과는 이미 합성된 PPI 리간드의 분자량과 함께 다음의 완보에 발표될 것이다.