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  • 1
    Electronic Resource
    Electronic Resource
    Carbohydrate dynamics during decay of litter of Spartina alterniflora (1986)
    Springer
    Marine biology 92 (1986), S. 277-284 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in absolute amounts of structural carbohydrates were followed over 23 mo (November 1979–September 1981) of decomposition of Spartina alterniflora litter in Great Sippewissett Marsh, Massachusetts, USA. Loss of structural carbohydrates was rapid during the first month, and temperature-dependent during the first year. In the second year, only 5 to 10% of the initial amounts of hemicelluloses and cellulose remained and little further loss occurred. Rates of decomposition were similar to each other and to that of the ash-free dry weight. Neither intraspecific differences in litter quality nor habitat differences within the salt marsh greatly altered the pattern of decomposition of structural carbohydrates among four types of litter of S. alterniflora. The persistence of structural carbohydrates after the first year of decay was apparently due to their close association with lignin. The proportion of lignin in the structural wall material (lignin +hemicelluloses+cellulose) increased throughout decay. Once the value of the ratio of lignin:structural wall material was greater than 0.3, little further loss of weight occurred. Concentrations of nitrogen were correlated with the proportion of lignin:structural wall material. This correlation presumably reflected the formation of refractory nitrogen-enriched complexes, and provided an indication of the increasing humification of the remaining material. The progressive lignification and humification of litter may play an important role in the storage and metabolism of organic carbon in salt marsh-estuarine ecosystems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392845
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  • 2
    Electronic Resource
    Electronic Resource
    Factors Influencing the Production of Low-Boiling Volatiles from Foods (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 30 (1965), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1965.tb00258.x
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  • 3
    Electronic Resource
    Electronic Resource
    Accumulation of Amino-acids in Plant Cell Tissue Cultures (1963)
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 1302-1303 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. AMINO-ACII )S AND Al JJOHEXOSES 11 * CULTURES GR OWN (a) WITH AND (6) WITHC 〉UT FREE Ace !ESS OF AIR Culture Amino -acids Suga irs (a) (&) (a) 〈&) Bean 8-5 40-2 67 60 Sycamore 4-2 25-1 109 103 Rose 19-4 47-0 7-3 5-8 Haplopapus 7-2 60 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1991302a0
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  • 4
    Electronic Resource
    Electronic Resource
    Methods for Determining the Degree of Polymerization of Flavans (1963)
    [s.l.] : Nature Publishing Group
    Nature 198 (1963), S. 587-588 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. MOLECULAR EXTINCTION COEFFICIENTS OF VARIOUS MODEL COMPOUNDS ANALYSED BY THE FOLIN-DENIS AND VANILLIN METHODS Compound Catechol Resorcinol Pyrogallol Phloroglucinol (+)-Catechin (-)-Epicatechin (+)-Gallocatechin (-) Epigallocatechin (-) Epigallocatechin gallate Theoflavin ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/198587a0
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of Illumination on the Synthesis of Leuco-Anthocyanins in Leaves (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 586-587 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been shown vbhat the occurrence of leuco-anthocyanins in leaves is closely associated with a woody habit in plants2, and that such leuco-antho-cyanins are possible precursors of heartwood extractives in Eucalyptus spp. in which their concentration in leaves varies throughout the season3. We ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/179586a0
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  • 6
    Electronic Resource
    Electronic Resource
    Separation of Anthocyanins from Plant Extracts (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 989-989 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The general application of polyamide (powdered nylon) columns in the purification of flavonoids has already been reported3 4, the separations achieved depending on two factors: the greater solubility of glycosides in water as compared with aglycones, and the strong absorptive capacity of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/183989a0
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  • 7
    Electronic Resource
    Electronic Resource
    Chemistry and Inheritance of Flower Colour in the Dahlia (1955)
    [s.l.] : Nature Publishing Group
    Nature 176 (1955), S. 1016-1018 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AS a result of the work of Lawrence, Scott-Mon-crieff, Price and ourselves1-8, it is known that the following classes of pigments are concerned in the variations of colour in the garden dahlia (D. variabilis): Magenta, purple, crimson and scarlet shades : anthocyanins. Yellow shades : chalkones, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1761016a0
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  • 8
    Electronic Resource
    Electronic Resource
    Identification of Flavones by the Ultra-Violet Absorption Spectra of their Ions (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 23-25 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT is well known that the ultra-violet absorption spectra of the ions of many polar-substituted compounds are markedly different from the spectra of the compounds themselves, usually the main band having shifted 20 m[x or more towards the red and increased in intensity. This fact has been used to a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172023a0
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  • 9
    Electronic Resource
    Electronic Resource
    Chlorogenic Acid and the Enzymic Browning of Apples and Pears (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 678-678 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Paper chromatograms run in butanol - acetic acid - water (4:1:5) of crude concentrated acetone extracts of Bramley's seedling apples show the presence of five fluorescent components when viewed in ultra-violet light in the presence of ammonia, three of which (RF 0-02, 0-08 and 0-20) show only ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172678a0
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  • 10
    Electronic Resource
    Electronic Resource
    Organic Acids of the Apple Fruit (1951)
    [s.l.] : Nature Publishing Group
    Nature 168 (1951), S. 254-254 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In addition to a relatively large spot corresponding with malic acid (Rp = 0-49), there appeared a second well-defined spot (j?j? = 0-18) and traces of a third spot (RF = 0-07). It was possible to wash some of the acid (RF = 0-18) from the chromato-gram and carry out tests on the solution so ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/168254a0
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