The paper describes simulation method for the evaluation of Coulomb interactions on energy spread in electron beam in the vicinity of Schottky emission source. It presents also some preliminary results of performed Monte Carlo simulations. and Článek se zabývá problematikou výpočtu vlivu coulombovských interakcí částic na energiovou šířku emitovaného svazku v blízkosti Schottkyho katody. Popisuje model i vlastní simulaci Monte Carlo elektronového emisního zdroje a metodiku zpracování výsledků.
With the increase in concentration of applied salicylic acid (SA), chlorophyll (Chl) content decreased significantly in both wheat and moong seedlings. Chl a/b ratio decreased significantly only in wheat and remained constant in moong. On the other hand, total carotenoid (Car) content, size of xanthophyll pool, and de-epoxidation rate increased significantly with an increase in SA concentration in both plant species. Hence SA treatment may induce Car biosynthesis in these plant species, but the increase in the xanthophyll pool and de-epoxidation rate indicates that SA may create oxidative stress the degree of which is different in various plants. and S. T. Moharekar ... [et al.].
Flooding stress (FS) induced changes in pigment and protein contents and in photochemical efficiency of thylakoid membranes of chloroplasts were investigated during senescence of primary leaves of rice seedlings. Leaf senescence was accompanied by loss in 2,6-dichlorophenolindophenol (DCPIP) photoreduction, rate of oxygen evolution, quantum yield of photosystem 2 with an increase in MDA accumulation, and non-photochemical quenching (NPQ) of chlorophyll fluorescence. These changes were further aggravated when the leaves during this period experienced FS. The increase in NPQ value under stress may indicate photosynthetic adaptation to FS. and S. K. Mishra ... [et al.].