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1985 (1)
1979 (1)
1Author    C. J. Soeder, E. Hegewald, E. Fiolitakis, J.U G RobbelaarRequires cookie*
 Title    Temperature Dependence of Population Growth in a Green Microalga: Thermodynamic Characteristics of Growth Intensity and the Influence of Cell Concentration  
 Abstract    Growth intensity o f the green alga, Scenedesmus obliquus, was measured in autotrophic cultures, diluted once daily, between 20 and 30 °C in a light-dark cycle o f 16 : 8 h at initial optical densities between 0.02 and 1.2. Arrhenius analyses o f the results showed linear relationships be­ tween growth intensity and temperature below the temperature optimum. The temperature effects on growth, activation energy, deactivation energy and normalized Q i0 values were signifi­ cantly influenced by the amount o f available light energy per unit biomass. The temperature dependence o f nutrient-lim ited growth was not considered. 
  Reference    Z. Naturforsch. 40c, 227—233 (1985); received Decem ber 5 1984 
  Published    1985 
  Keywords    M icroalgae, Growth, Temperature, Light, Thermodynamics 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0227.pdf 
 Identifier    ZNC-1985-40c-0227 
 Volume    40 
2Author    KennethE. Pallett, AlanD. DodgeRequires cookie*
 Title    The Role of Light and Oxygen in the Action of the Photosynthetic Inhibitor Herbicide Monuron  
 Abstract    Monuron treatment of detached flax cotyledons caused a rapid inhibition of C 02 fixation in darkness and light. Chlorophyll breakdown was promoted by increased light intensity. Ethane generation, an indicator of membrane damage, increased as the chlorophyll level decreased. The carotene pigments were destroyed more rapidly than the xanthophylls and chlorophylls. Treatment of cotyledons with monuron in the absence of oxygen almost prevented carotenoid and chlorophyll loss. The addition of the singlet oxygen quencher DABCO delayed chlorophyll breakdown. The results are discussed in relation to a role for singlet oxygen in the herbicidal action of monuron. 
  Reference    Z. Naturforsch. 34c, 1058—1061 (1979); received May 29 1979 
  Published    1979 
  Keywords    Herbicidal Action of Monuron, Light, Oxygen, Singlet Oxygen, Plant Pigments 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-1058.pdf 
 Identifier    ZNC-1979-34c-1058 
 Volume    34