A new type of chlorophyll catabolite was isolated from extracts of de-greened primary leaves of barley (Hordeum vulgare cv. Lambic). Its constitution was elucidated by one-dimensional and two-dimensional [(1)H,(13)C]-homo- and heteronuclear NMR spectroscopic techniques and by high resolution mass spectroscopy. The isolated catabolite, a water-soluble, colorless, and nonfluorescent linear tetrap...

Chloroplast Membranes, Lipid Peroxidation, Singlet Oxygen, H erbicide Dam age, Chloroplast Pigments The breakdown of chlorophylls, carotenoids, and linolenic acid together with the formation o f malondialdehyde and ethane was followed in isolated pea chloroplast membranes. Breakdown was enhanced by light, oxygen, D 20 and rose bengal, but retarded by crocetin. The results are discussed in relat...

tausches sind zwar wesentlich kleiner als bei der Phosphorylierung im Licht und den bisher bekannt gewordenen ATP-ase-Reaktionen in Chloroplasten (JAGENDORF und U R I B E 1 5 ) . Die Austauschreaktion verläuft unter ähnlichen Bedingungen wie der lichtinduzierte ATP — Pa-Austausch ( C A R M E L I und A V R O N 8 ) und wie die chemiosmotische Phosphorylierung. Die Induktion der Austauschreaktion ...

Nonradiative relaxation of high-energy excited states to the lowest excited state in chlorophylls marks the first step in the process of photosynthesis. We perform ultrafast transient absorption spectroscopy measurements, that reveal this internal conversion dynamics to be slightly slower in chlorophyll B than in chlorophyll A. Modeling this process with non-adiabatic excited state molecular dy...

The aim. aim of this study was to propose methods standardization Eucalyptus globulus leaves and Cetraria islandica slan by the main group biologically active substances (BAS). This done for further development complex medicines based on slan.
 These studies provide an opportunity extracts from these plants, is a medicine.
 Materials methods. Thin layer chromatography used determine p...

The application of pulsed electric fields (PEF) is an innovative extraction technology promoting cell membrane electroporation, thus allowing for efficient recovery, from energy point view, antioxidant compounds (chlorophylls, carotenoids, total phenolic compounds, etc.) microalgae. Due to its selectivity and high yield, the effects PEF pre-treatment (3 kV/cm, 100 kJ/kg) combined with supplemen...