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  • 1
    Electronic Resource
    Electronic Resource
    Some Consequences of the Gravitational Deflexion of Light (1923)
    [s.l.] : Nature Publishing Group
    Nature 112 (1923), S. 471-472 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE results of the eclipse expeditions of 1919 and 1922 leave little doubt that the deflexion of 1.75″ predicted by Einstein for a ray of light passing close by the sun is a fact. Moreover, as a result of the experiments of Lebedew and Poynting, it is admitted generally that such a ray ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/112471a0
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  • 2
    Electronic Resource
    Electronic Resource
    Some Terrestrial Experiments on Gravitation and Einstein's Theory. (1922)
    [s.l.] : Nature Publishing Group
    Nature 109 (1922), S. 106-106 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE object of this letter is to direct the attention of writers on Einstein's theory of gravitation to some recent experiments on the terrestrial aspects of gravitation which seem to have been overlooked, although they appear to be of great importance for the purpose of forming a just estimate ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/109106b0
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  • 3
    Electronic Resource
    Electronic Resource
    On a Dynamical System illustrating Spectrum Lines (1904)
    [s.l.] : Nature Publishing Group
    Nature 70 (1904), S. 176-176 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I DESIRE to express to Prof. Nagaoka my regret at my misinterpretation of his letter to NATURE of February 25, which was due simply to my failure to find any mention there of the larger system of which he speaks. No doubt his ring is quasi-stable if the central positive charge is large enough; ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/070176b0
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  • 4
    Electronic Resource
    Electronic Resource
    A Dynamical System illustrating the Spectrum Lines and the Phenomena of Radio-activity (1904)
    [s.l.] : Nature Publishing Group
    Nature 69 (1904), S. 437-437 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN NATURE of February 25 there appeared a letter by Prof. Nagaoka, of Tokyo, relative to the stability and vibrations of a ring of negative electric charges revolving about a central positive charge. Prof. Nagaoka states that such a system is generally stable, but as the result of an ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/069437b0
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  • 5
    Electronic Resource
    Electronic Resource
    Ionisation and Anomalous Dispersion (1907)
    [s.l.] : Nature Publishing Group
    Nature 75 (1907), S. 461-461 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN NATURE of February 21, Prof. Wood, referring to my letter of January 17, says that the effects observed were probably due to disturbance of the density gradient of the sodium vapour caused by “local heating by the wire.” I am afraid that in my letter I cannot have described the experimental ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/075461a0
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  • 6
    Electronic Resource
    Electronic Resource
    A Fundamental Contradiction between the Electrical Theory of Dispersion and the Phenomena of Spectrum-Series (1908)
    [s.l.] : Nature Publishing Group
    Nature 77 (1908), S. 413-413 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE electrical theory of dispersion is based on the hypotheses (1) that electric waves are due to motions of electric charges, and waves of light in particular to vibrations of charges inside the atom; and (2) that these vibrations are governed by linear equations. On this basis we obtain the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/077413b0
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  • 7
    Electronic Resource
    Electronic Resource
    On Dispersion and Spectrum Series (1908)
    [s.l.] : Nature Publishing Group
    Nature 78 (1908), S. 55-55 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN reply to Mr. Campbell's letter of April 30, it must suffice to point out that my letter of March 5 was limited to infinite spectrum series and to luminous gases. This seemed to me at the time of writing obvious from the context, as well as from the express reference to the finiteness of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/078055b0
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  • 8
    Electronic Resource
    Electronic Resource
    Ionisation and Absorption and Anomalous Dispersion (1907)
    [s.l.] : Nature Publishing Group
    Nature 75 (1907), S. 271-271 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR. STARK (NATURE, vol. lxxiii., pp. 78, 389, 533) has given a theory, based on his canal-ray experiments, according to which spectrum series are due to positive ions. It occurred to me that its applicability to thermal emission might be tested by experiments on the ionisation accompanying the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/075271b0
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  • 9
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    SKI2 mediates degradation of RISC 5'-cleavage fragments and prevents secondary siRNA production from miRNA targets in Arabidopsis (2015)
    Oxford University Press
    Details
    Publication Date: 2015-12-16
    Description: Small regulatory RNAs are fundamental in eukaryotic and prokaryotic gene regulation. In plants, an important element of post-transcriptional control is effected by 20–24 nt microRNAs (miRNAs) and short interfering RNAs (siRNAs) bound to the ARGONAUTE1 (AGO1) protein in an RNA induced silencing complex (RISC). AGO1 may cleave target mRNAs with small RNA complementarity, but the fate of the resulting cleavage fragments remains incompletely understood. Here, we show that SKI2 , SKI3 and SKI8 , subunits of a cytoplasmic cofactor of the RNA exosome, are required for degradation of RISC 5', but not 3'-cleavage fragments in Arabidopsis . In the absence of SKI2 activity, many miRNA targets produce siRNAs via the RNA-dependent RNA polymerase 6 (RDR6) pathway. These siRNAs are low-abundant, and map close to the cleavage site. In most cases, siRNAs were produced 5' to the cleavage site, but several examples of 3'-spreading were also identified. These observations suggest that siRNAs do not simply derive from RDR6 action on stable 5'-cleavage fragments and hence that SKI2 has a direct role in limiting secondary siRNA production in addition to its function in mediating degradation of 5'-cleavage fragments.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 10
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    The protein kinase TOUSLED facilitates RNAi in Arabidopsis (2014)
    Oxford University Press
    Details
    Publication Date: 2014-07-04
    Description: RNA silencing is an evolutionarily conserved mechanism triggered by double-stranded RNA that is processed into 21- to 24-nt small interfering (si)RNA or micro (mi)RNA by RNaseIII-like enzymes called Dicers. Gene regulations by RNA silencing have fundamental implications in a large number of biological processes that include antiviral defense, maintenance of genome integrity and the orchestration of cell fates. Although most generic or core components of the various plant small RNA pathways have been likely identified over the past 15 years, factors involved in RNAi regulation through post-translational modifications are just starting to emerge, mostly through forward genetic studies. A genetic screen designed to identify factors required for RNAi in Arabidopsis identified the serine/threonine protein kinase, TOUSLED (TSL). Mutations in TSL affect exogenous and virus-derived siRNA activity in a manner dependent upon its kinase activity. By contrast, despite their pleiotropic developmental phenotype, tsl mutants show no defect in biogenesis or activity of miRNA or endogenous trans -acting siRNA. These data suggest a possible role for TSL phosphorylation in the specific regulation of exogenous and antiviral RNA silencing in Arabidopsis and identify TSL as an intrinsic regulator of RNA interference.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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