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  • Wiley  (14)
  • Nature Publishing Group  (9)
  • Blackwell Publishing Ltd  (2)
  • Heidelberg: Springer
  • 1995-1999  (12)
  • 1990-1994  (6)
  • 1980-1984  (6)
  • 1965-1969  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Formation and Fragmentation of Protostellar and Protoplanetary Disks (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 675 (1992), 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.1749-6632.1992.tb56813.x
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  • 2
    Electronic Resource
    Electronic Resource
    Plasma membrane lipid metabolism of petunia petals during senescence (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 90 (1994), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The specific activities of 6 enzymes, which are involved in the synthesis and catabolism of membrane lipids, were monitored in plasma membranes isolated from petunia petals during senescence. These included phosphatidylinositol (PI) kinase (EC 2.7.1.67), phosphatidylinositol monophosphate (PIP) kinase (EC 2.7.1.68). diacylglycerol (DAG) kinase (EC 2.7.1.107), phospholipase A (EC 3.1.1.4) and PIP- and PIP2-phospholipase C˙(EC 3.1.4.3). Using endogenous substrate, the [32P]PA and [32P]PIP2 formation increased to 140 and 200%, respectively, of the day 1 value by 4 days after harvest. There was no significant change in [32P]PIP formation during the same time period. On the fifth day the petals wilted and the [32P]PA and [32P]PIP formation declined significantly. In contrast, the [32P]PIP2 formation remained high in the day 5 petals. When the lipid kinase activities were assayed in the membranes in the presence of exogenous substrate the specific activity of all of the enzymes increased. and the changes in [32P]PA production over the 5-day period were similar to those observed with endogenous substrate. When exogenous PI and PIP were added, however, there was no longer an increase in [32P]PIP2 formation by plasma membranes of day 4 petals and [32P]PIP formation significantly decreased. The relative decrease in PIP and PIP2 formation by day 4 membranes when exogenous substrate was added may have resulted from differences in the lipase activities in the day 1 and day 4 membranes. The plasma membrane A-type phospholipase activity increased throughout the 5 day period, and phospholipase C activity increased two-fold between day 1 and day 4. Such changes in the metabolism of the plasma membrane lipids during flower senescence would affect the ability of the petals to use inositol phospholipid-based signal transduction pathways.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1994.tb00388.x
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  • 3
    Electronic Resource
    Electronic Resource
    Time-dependent models of single- and double-layer mantle convection (1984)
    [s.l.] : Nature Publishing Group
    Nature 308 (1984), S. 533-535 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Models of mantle convection have been proposed with several different combinations of convecting layers, including convection confined to the upper mantle, convection in separate layers in the upper and lower mantle, and whole-mantle convection2-10. The models of double-layer convection have been ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/308533a0
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  • 4
    Electronic Resource
    Electronic Resource
    Hot times in the solar nebula (1995)
    [s.l.] : Nature Publishing Group
    Nature 377 (1995), S. 578-579 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] How hot did it get? That question was on the minds of meteoriticists gathered in Washington DC this September*. While autumn breezes cooled the Mall, scientists meeting deep underground presented convincing evidence that the early solar nebula was considerably hotter than has been thought likely ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/377578a0
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  • 5
    Electronic Resource
    Electronic Resource
    Giants and dwarfs meet in the middle (1996)
    [s.l.] : Nature Publishing Group
    Nature 379 (1996), S. 397-398 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] How massive can a giant planet be? What is the lowest mass for a brown dwarf star? The answers to both of these questions have changed because of observations presented at a recent meeting187th Meeting of the American Astronomical Society, San Antonio, USA, 14-18 January 1996.Geoffrey W. Marcy (San ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/379397a0
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  • 6
    Electronic Resource
    Electronic Resource
    Timing is everything (1995)
    [s.l.] : Nature Publishing Group
    Nature 375 (1995), S. 13-14 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] How long did the earliest phases of planet formation last in the inner Solar System? New measurements of aluminium isotope abundances in primitive meteorites imply that rocky solids were formed in a dusty disk over a period of about 10 million years (Myr). That period of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/375013a0
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  • 7
    Electronic Resource
    Electronic Resource
    Formation of hierarchical multiple protostellar cores (1991)
    [s.l.] : Nature Publishing Group
    Nature 351 (1991), S. 298-300 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fragmentation during the isothermal collapse phase of pro-tostellar evolution is one of the leading mechanisms for explain-ing the formation of binary and multiple stars9"13. Although it is well known that fragmentation can form binary protostellar cores or trapezium-like (unstable) multiple ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/351298a0
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  • 8
    Electronic Resource
    Electronic Resource
    Gene regulation: Enhancer elements in immunoglobulin genes (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 281-282 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EXPERIMENTS designed to explore the control of antibody production have revealed for the first time the existence of enhancer sequences in eukaryotic genes. Enhancers, until now identified only in viruses, are short regulatory sequences that increase the rate of transcription from many eukaryotic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303281a0
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  • 9
    Electronic Resource
    Electronic Resource
    Genetic evidence equating SRY and the testis-determining factor (1990)
    [s.l.] : Nature Publishing Group
    Nature 348 (1990), S. 448-450 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SRY sequences were amplified by the polymerase chain reaction from DNA of XY females, as well as normal male controls. The amplified products were cleaved with restriction enzymes and run on non-denaturing polyacrylamide gels to detect single-strand conformational polymorphisms (SSCP) (Fig. 1). ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/348448a0
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  • 10
    Electronic Resource
    Electronic Resource
    Vitamin A-induced Rejection of Autografts and Homografts (1965)
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 1022-1022 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Local wild rabbits of 25?3 kg were used. Autografts were made on 10 rabbits by grafting pieces of full-thickness abdominal skin, 2 cm x 2 cm in area, to the rabbit's own back. Homografts of identical size were exchanged between 14 rabbits grouped in pairs. Vitamin A palmitate, 1,700,000 units/kg, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2051022a0
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