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  • Articles  (43)
  • 1990-1994  (27)
  • 1975-1979  (4)
  • 1955-1959  (4)
  • 1880-1889  (2)
  • 1870-1879  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    The Preparation of t-Acetylenic Carbinol Esters and Related Compounds1 (1957)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 79 (1957), S. 2146-2148 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01566a032
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  • 2
    Electronic Resource
    Electronic Resource
    The Kinetics of the Saponification of Acetylenic Carbinol Esters and Related Compounds1 (1957)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 79 (1957), S. 2148-2150 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01566a033
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  • 3
    Electronic Resource
    Electronic Resource
    IX.—Descriptions of New Species of Fossils, from the Upper Silurian Rooks of Port Jervis, N. Y.; with Notes on the occurrence of the Goralline Limestone at that Locality (1879)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 1 (1879), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1879.tb55114.x
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  • 4
    Electronic Resource
    Electronic Resource
    Letters. Power Plants (1976)
    s.l. : American Chemical Society
    Environmental science & technology 10 (1976), S. 964-964 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es60121a601
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  • 5
    Electronic Resource
    Electronic Resource
    The Microphone (1878)
    [s.l.] : Nature Publishing Group
    Nature 18 (1878), S. 540-540 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE form of microphone described by Mr. Gerald B. Francis (NATURE, vol. xviii. p. 383) is easily made and very efficient. It not only did for me all its inventor promised, but with a common tumbler inverted over it upon the sounding-board so as to prevent direct impact of sound waves upon the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/018540d0
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  • 6
    Electronic Resource
    Electronic Resource
    Structural and electronic properties of sodium-intercalated C 60 (1992)
    [s.l.] : Nature Publishing Group
    Nature 356 (1992), S. 416-418 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Direct reaction of C60 with alkali-metal vapour in sealed pyrex tubes has been the predominant synthetic route to AXC60 (where A is K, Rb or Cs), but the lower vapour pressure and greater reactivity with pyrex are a severe problem for reactions with sodium. Therefore, we have ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/356416a0
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of a change in the level of inbreeding on the genetic load (1991)
    [s.l.] : Nature Publishing Group
    Nature 352 (1991), S. 522-524 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experimental plant was the self-compatible annual water hyacinth, Eichhornia paniculata (Pontederiaceae). The species inhabits ephemeral pools and ditches in northeastern Brazil and the Caribbean, and exhibits a wide range of natural outcrossing rates12. The experiments reported here used ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/352522a0
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  • 8
    Electronic Resource
    Electronic Resource
    Ice Crystals and Filaments (1880)
    [s.l.] : Nature Publishing Group
    Nature 21 (1880), S. 537-537 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SOMETHING very like the “comb-like masses of ice” appears upon the surfaces of plaster-models such as dentists make, after they have been coated with a preparation called Liquid Silex; except that it is finer and woolly. It seems to be caused by the contraction of the models forcing out very ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/021537c0
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of prior self-pollination on outcrossed seed set in tristylous Pontederia sagittata (Pontederiaceae) (1994)
    Springer
    Sexual plant reproduction 7 (1994), S. 273-281 
    Details
    ISSN: 1432-2145
    Keywords: Pollen-pistil interference ; Prior self-pollination ; Tristyly ; Self-incompatibility Stylar senescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The potential inhibitory effects of incompatible pollen on outcrossed seed set were investigated in mass-flowering, self-incompatible, tristylous Pontederia sagittata. Prior application of self pollen, followed after 2, 4, or 6 h by compatible pollen, was conducted on five genotypes of each of the three style morphs under uniform glasshouse conditions. The greatest reductions in seed set occurred in pollinations of the long-styled (L) morph at the 6 h time interval. Smaller reductions were also found for this treatment in the mid-styled (M) morph. No significant reductions in seed set were observed in the short-styled (S) morph or in the other morphs at shorter time intervals. Observations of pollen germination and pollen tube growth indicated that the lack of inhibitory effects in the S morph may occur because relatively few pollen grains adhered to stigmas in selfpollinations. In the L and M morphs, early germination of self pollen may cause physical clogging of the stigma and style, resulting in a reduced number of compatible pollen tubes in styles. Observations of the structural integrity of styles indicated that prior germination of self pollen resulted in more rapid onset of pistil senescence, particularly in the L morph. These influences may contribute to the morph-specific differences in seed set observed following prior self-pollination of outcrossed flowers. The negative effects of incompatible pollen are likely to be most evident where ecological factors cause delays in the delivery of outcross pollen to stigmas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00227709
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  • 10
    Electronic Resource
    Electronic Resource
    Changes in the lipid composition and maximisation of the polyunsaturated fatty acid content of three microalgae grown in mass culture (1993)
    Springer
    Journal of applied phycology 5 (1993), S. 71-83 
    Details
    ISSN: 1573-5176
    Keywords: Isochrysis ; lipid ; mariculture ; mass culture ; microalgae ; Nannochloropsis ; nutrition ; Pavlova ; polyunsaturated fatty acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three species of microalgae were grown in mass culture to investigate the influence of culture technique and growth phase on the production of 20:5(n−3) and 22:6(n−3). These polyunsaturated fatty acids (PUFA) are considered to be essential in many marine animals diets for high growth and survival rates. The species of microalgae examined wereNannochloropsis oculata, Pavlova lutheri andIsochrysis sp. (clone T.Iso). All batch cultures (logarithmic and stationary phase) and semi-continuous cultures (logarithmic phase) examined contained high levels of the long-chain (n−3) PUFA, but production could be maximised by harvesting at specific times and growth phases. Maximum cellular content (pg cell-1) of long-chain PUFA was found in logarithmic phase batch cultures ofN. oculata and in stationary phase cultures ofP. lutheri. The cellular content of PUFA in cultures ofIsochrysis sp. did not change significantly with culture technique or growth phase. Alternatively, stationary phase cultures of all three species showed increased proportions (%) and cellular contents of triacylglycerols, and saturated and monounsaturated fatty acids with correspondingly decreased proportions of polar lipids and most PUFA relative to logarithmic phase cultures. The exception was the proportion and cellular content of 22:6(n−3) inP. lutheri which increased with triacylglycerol content. The mass of long-chain (n−3) PUFA per volume of culture was significantly higher in stationary phase cultures due to the higher cell counts per volume. These findings indicate that the opportunity exists to maximise PUFA production by microalgae with the potential to improve animal growth and reduce production costs in mariculture operations and may be of use in the large scale culture and harvesting of microalgae for the biotechnology industry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182424
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