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  • 1
    Electronic Resource
    Electronic Resource
    Fluorescence in Relation to Photosynthesis (1972)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 23 (1972), S. 87-112 
    Details
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.23.060172.000511
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  • 2
    Electronic Resource
    Electronic Resource
    Efficiency of light conversion by the blue-green alga Anacystis nidulans (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 333-335 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] High growth rates require an adequate supply of carbon dioxide for cell production. As a result of a high ratio of outer surface area chlorophyll content, favourable for CO2 diffusion, unicellular organisms can profit much more from enhanced CO2 availability than leaves of higher plants. Using a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256333a0
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  • 3
    Electronic Resource
    Electronic Resource
    Chemiluminescence of Chlorophyll a and Bacteriochlorophyll in Relation to Redox Reactions (1962)
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 875-876 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] If oxidation of chlorophyll a by ferric ions and reduction by ferrous ions was performed in absolute darkness, it was found that light was emitted on the moment when the reductant is added and the original chlorophyll a spectrum was restored. By adjusting interference filters between sample cuvette ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/193875a0
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  • 4
    Electronic Resource
    Electronic Resource
    Chlorophyll Spectra and Molecular Structure (1955)
    [s.l.] : Nature Publishing Group
    Nature 176 (1955), S. 928-929 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Dichroism. Pigments were oriented in lecithin or ammonium olate by pressing between a microscope slide and a cover glass. Absorption was measured with a barrier-layer photocell or photographically. For planar molecules of approximate symmetrical shape, such as the porphin derivatives, it is in this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/176928a0
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  • 5
    Electronic Resource
    Electronic Resource
    Slow reversible bleaching and fluorescence quenching caused by carotenoid absorption in chromatophores and cells of Chromatium vinosum (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 62 (1984), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Light absorbed by carotenoids in Chromatium can result in photobleaching of bacteriocholorophyll and quenching of B 890 fluorescence, whereas light of the same intensity absorbed by bacteriochlorophyll has no such effect. Photobleching and fluorescence quenching are partly and slowly reversible in the dark. They are prevented by removal of oxygen or by addition of various reductants and decreased by addition of NaN3− histidine or tryptophane. This suggests the participants of singlet excited oxygen in the measured phenomena. As change in temperature between 30° and –30°C and addition of gramicidin S, which changes the permeability of the membranes, does not affect photobleaching or fluorescence quenching markedly, enzymatic or structural properties do not seem to be involved. The results suggest that light absorbed by carotenoids is partly transferred to bacteriochlorophyll and partly used to excite carotenoids to triplet states. The latter process will counteract the function that carotenoids have in protecting chromatophore components against photobleaching.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1984.tb00381.x
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  • 6
    Electronic Resource
    Electronic Resource
    Chlorophyllase and Photsystem (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 45 (1979), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 〈list xml:id="l1" style="custom"〉1Preliminary experiments showed that Triton X-100 at low concentrations (appr. 0.01%) induces reversible changes in some photosynthetic reactions in Phaeodactylum cells without influencing their absorption spectrum; presumably membrane permeability is effects. Although DC PIP can pass through the cell membrane in the presence of 0.01% Triton X-100, only a very low PS I activity, measured as MV photoreduction by DCPIP-ascorbate, is observed with whole cells.2MV photoreduction sensitized by membrane fragments isolated from Phaetdactylum, Euglena, Porphyridium and Synechococcus after French Press treatment is much higher with Phaeodactylum than with the other organisms. Spinach shroma membrane fragments show higher photosensitizing activity than grana fragments.3MV photoreduction in the above mentioned experiments is not influenced by DCMU (2 × 10−6M) or sodium azide (0.01–0.05 M); KCN (4 × 10−3M) has an inhibiting effect only with the blue-green alga Synechococcus. The reaction mechanism of chlorophyll-sensitized MV photoreduction is discussed.4Chlorophyll in an aqueous medium containing Triton X-100 (JsO.01%) sensitizes the photoreduction of MV by DCPIP ascorbate. A similar reaction is observed with chlorophyll combined with solubilized Phaeocdactylum chlorophyllase: in the latter case the presence of both MgCl2 and DTT is required.5MV-photoreduction is concluded to be a very unreliable procedure for determining PS I activity in membranes if these membranes have been prepared in (the presence of detergents.6The results support the hypothesis that (prochlorophyllase is a PS I protein.7The capacity of PS I to reduce MV in vivo is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1979.tb02598.x
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  • 7
    Electronic Resource
    Electronic Resource
    Comparison of the long-wave chlorophyll fluorescence in various green and blue-green algae and diatoms (1981)
    Springer
    Photosynthesis research 2 (1981), S. 49-60 
    Details
    ISSN: 1573-5079
    Keywords: blue-green algae ; chlorophyll fluorescence ; diatoms ; green algae ; long-wave bands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two types of long-wave fluorescence bands with similar band shape occur at room temperature in various algae: FII700 and FI715. FII700 occurs in a limited number of algae, follows PS II transients, increases with culture age and is moderately increased by cooling to 83 K. FI715 occurs in most algae, especially Anabaena, but much less in most diatoms and Tribonema. It does not follow PS II transients, does not increase with culture age and is much increased by cooling to 83 K. An interpretation for the characteristics of FII700 and FI715 is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036165
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  • 8
    Electronic Resource
    Electronic Resource
    Properties of a pigment system consisting of carotenoids and reaction centre pigments in chromatophores of Rhodospirillum rubrum (1984)
    Springer
    Photosynthesis research 5 (1984), S. 77-87 
    Details
    ISSN: 1573-5079
    Keywords: chromatophores ; carotenoids ; bacteriochlorophyll ; fluorescence ; bacteriochlorophyll absorption difference spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A pigment system containing carotenoids and oxidised reaction centre pigments is present in chromatophores of Rhodospirillum rubrum and this pigment system may cause fluorescence quenching when a still unidentified chromatophore component is in its oxidised state. Besides by its action spectrum, this pigment system is characterised by the time course and level of light saturation of the effect. The quenching of bacteriochlorophyll fluorescence is abolished when the permeability of the chromatophore membranes is affected. The quenching effect is correlated with a reversible absorption decrease of B 880. A possible function for this pigment system is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00018376
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  • 9
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    Fluorescence in Relation to Photosynthesis (1972)
    Annual Reviews
    Details
    Publication Date: 1972-06-01
    Print ISSN: 0066-4294
    Topics: Biology
    Published by Annual Reviews
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  • 10
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    Chemiluminescence of Chlorophyll a and Bacteriochlorophyll in Relation to Redox Reactions (1962)
    Springer Nature
    Details
    Publication Date: 1962-03-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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