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김우현,홍민의,심상준 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
High temperatures (30-36°C) inhibited astaxanthin accumulation in H. pluvialis under photoautotrophic conditions. The depression of carotenogenesis was primarily attributed to excess intracellular less reactive oxygen species (LROS; O<sub>2</sub><sup>-</sup> and H<sub>2</sub>O<sub>2</sub>) levels generated under high temperature conditions. Here we show that the heat stress-driven inefficient astaxanthin production was improved by accelerating the iron-catalyzed Haber-Weiss reaction to convert LROS into more reactive oxygen species (MROS; O<sub>2</sub> and OHㆍ), thereby facilitating lipid peroxidation. As a result, during 18 days of photoautotrophic induction, the astaxanthin concentration of cells cultured in high temperatures in the presence of iron (450 μM) was dramatically increased by 75% (30°C) and 133% (36°C) compared to that of cells exposed to heat stress alone. The heat stress-driven Haber-Weiss reaction will be useful for economically producing astaxanthin by reducing energy cost and enhancing photoautotrophic astaxanthin production, particularly outdoors utilizing natural solar radiation including heat and light for photo-induction of H. pluvialis.
Neurospora Crassaa의 ADP-ribosyl Transferase의 성상
김우현,이정섭,허영희,김종석,김형로 의과학연구소 1989 全北醫大論文集 Vol.13 No.1
ADP-ribosyl transferase, which catalyzes the transfer ADP-ribose moiety of NAD to accepto portein, was identified in the mycelium of Neurospora crassa grown in Fries minimal medium. The specific activity of ADP-ribosyl transferase was markedly reduced in the mycelium in the zinc deficent medium, whereas that of NAD glycohydrolase was highly increased in the same batch of enzyme source. This result indicates that the two enzymes are differently regulated at the gene level. The enzyme activity of Nurospora was nott affected by the presence of DNA, histone, or Mg^2+ which are known as the activators of poly ADP-ribosyl transferase. Also, the inhibitors of poly ADP-ribosyl transferase such as nicotinamide or benzamide showed little inhibitory efects on the enzyme activity. These results suggest that of Neurospora is not poly ADP-ribosyl transferase, but mono ADP-ribosyl transferase. The optimal pH and Km value of the enzyme were pH .57 and 10 μM, respectively.
김우현,배규성 경북대학교 환태평양연구소 1992 環太平洋硏究 Vol.5 No.-
Up to now bases of his philosophical and historical background we analysed Bakunin's assertion of Collectivism (Lumpenproletariat Socialism), Pan-Slavic Federation and European Democratic Federation of Republics in his Program of Democratic Pan-Slavism which appeared at the Prague Congress of the Slavs 1848 in the form of 'Appeal to Slavs' or 'Manifesto to the Slavs'. His main theme is Freedom, not ristricted by outside factors but only by his own will, which presents the last moments of history, Humanity and the solidarity of freedom. Meanwhile State and the Church are two systems of slavery to be demolished. State depends on the maintenance of slavery and minorities' privilege over drudge people for its existence and the church is the earthly agent of God, the extreme of abstraction. Science also should not be more than the function of life not to speak of the means of exploitation of the poor people in the name of it. Future society of freedom and humanity could be constructed only by demolishing state and the church, the solidarity of privileged class and establishing federatern of small autonomous communes on the bases of natural, instinctive solidarity of human beings and humanity. In the mean time, 19C is the century of Liberalism, Democracy and Nationalism. Putting it aside whether the times ideas or ideas lead the times, Bukunin led revolutionary Europe of 19C with Marx, his fellow and competitor in the theory and movement of Europen Revolution. He saw the breakdown of Hapsburg Empire as the ground of Free Federation of the Slavs and Europe, at last, all the World. In conclusion together with his influence on the labor movement, populism in Russia, anarchism, revolution of a small number of professional revolutionaries, Bolshevism, Fascism and all the national revolution of Socialism, We can see his life and philosophy in the following four points of view. First, in the viewpoint of philosophy of Freedom. His philosophy of Freedom not restricted by State and the church but only by his inner side, containing all kinds of scientific abstractions is in itself potent possibility of each people. In Freedom the full development of material, intellectual, moral possibilities can develope endlessly, being not restricted by that of other people. Second, in the viewpoint of European Revolution. While Marx asserted revolution of class-conscious and systematic proletariat not as 'governing people' but 'administrating things' to get rid of the bourgeois order of society and set up huge cooperative commonwealth, Bakunin insisted on general, voluntary, immediate revolution of all exploited class, rural and urban. All kinds of State and Government to have an absolute tendency to power in itself shold be broken down and in the ruin of them will appear Free Federation of Small Autonomous Associations. Third, in the viewpoint of international politics, He insisted on Democratic Pan-Slavism. In a sense his philosophy is a Russian Messianism containing the claim of Slavophiles. His Federalism of Pan-Slavism is supranational and has tools of revolution as well as suitable means of supranational organization in its federation principle. Fourth, in the viewpoint of utopian philosophy, His aim was Federation of Pan-Slavism, European Democracy and Federation, finally World Federation According to Professor Eugene Pyziur, researcher of Bakunin, his philisophy has not only Utopian law for obtaining full and complete Freedom but also non-utopian law for full command of political power and establishment of strict social order. But practical application of his theory to reality demands the sacrifice of his utopian factor of Freedom.