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  • 1
    Electronic Resource
    Electronic Resource
    Molecular characterization of the nodulation gene, nodT, from two biovars of Rhizobium leguminosarum (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 4 (1990), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: DNA sequencing of the nodlJ region from Rhizobium leguminosarum biovar trifolii revealed the nodT gene immediately downstream of nodJ. DNA hybridizations using a nodT-specific probe showed that nodT is present in several R. leguminosarum strains. Interestingly, a flavonoid-inducible nodT gene homologue in R. leguminosarum bv. viciae is not in the nodABCIJ operon but is located downstream of nodMN. The sequence of the nodT gene from bv. viciae was determined and a comparison of the predicted aminoacid sequences of the two nodT genes shows them to be conserved; the predicted protein sequences appear to have a potential transit sequence typical of outer-membrane proteins. Mutations affecting nodT in either biovar had no observed effect on nodulation of the legumes tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1990.tb00591.x
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  • 2
    Electronic Resource
    Electronic Resource
    Altruism and Related Phenomena, Mainly in Social Insects (1972)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 3 (1972), S. 193-232 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.03.110172.001205
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  • 3
    Electronic Resource
    Electronic Resource
    Single and multiple mutations affecting properties of the regulatory gene nodD of Rhizobium (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 3 (1989), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: nodD of Rhizobium leguminosarum has two regulatory properties: it autoregulates and, in cells grown with specific flavonoids, activates other nod genes. We isolated mutations in nodD affecting one or both properties. Those abolishing autoregulation and nod gene induction were at the 5′ end of nodD, as were those which only affected autoregulation. Mutations affecting nod gene activation are at the 3’end of nodD. Eleven mutations in this region of nodD were isolated: some had little effect on the regulatory properties; others reduced activation of other nod genes. 265 bps were removed from the 3’end of nodD: this abolished nodD function. Doubly mutant derivatives of nodD were constructed by making nodD genes with a mutation that conferred the ability to activate transcription of nod genes in the absence of inducers (class IV) plus another that abolished autoregulation and/or flavonoid-dependent nod gene activation. The behaviour of such double mutants was complex; e.g. in one case, a doubly mutant nodD gene containing the class IV mutation, coupled to one of those that (alone) abolished autoregulation and nod gene induction, was similar in behaviour to the wild type. In other cases, double mutants were similar to one of the parentals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1989.tb00142.x
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  • 4
    Electronic Resource
    Electronic Resource
    Selfish and Spiteful Behaviour in an Evolutionary Model (1970)
    [s.l.] : Nature Publishing Group
    Nature 228 (1970), S. 1218-1220 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Previously1'2 I showed that the average .genetical relatedness of interacting individuals is an important factor in the evolution of social adaptations. In the model, selfishness within certain limits was readily accounted for; spite did not seem possible. But another line of reasoning3 shows that ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2281218a0
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  • 5
    Electronic Resource
    Electronic Resource
    Exotic pests and parasites (1995)
    [s.l.] : Nature Publishing Group
    Nature 374 (1995), S. 769-770 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Orr et al. in Scientific Correspondence1 describe the competitive dominance of the red imported fire ant Solenopsis invicta at food resources in Brazil, which is diminished when under attack by phorid flies, and suggest that this parasite could be used to control the ant in the southern ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/374769b0
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  • 6
    Electronic Resource
    Electronic Resource
    Parasites and sexual selection (1989)
    [s.l.] : Nature Publishing Group
    Nature 341 (1989), S. 289-290 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] HAMILTON AND ZUK REPLYá€"Before responding to Cox, it is necessary to deal with inaccuracies in Read and Harvey's response1 to Zuk2. Her claim (on which both of us, as authors of the original paper3, agreed) was that Read and Harvey's re-analysis4 in fact produces significant ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/341289b0
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  • 7
    Electronic Resource
    Electronic Resource
    Coefficients of relatedness in sociobiology (1980)
    [s.l.] : Nature Publishing Group
    Nature 288 (1980), S. 694-697 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] What is R in equation (1)? On the basis of a particular outbred model, Hamilton1'2 claimed that Wright's19 'coefficient of relationship' was the required R. However, later, giving a heuristic development but no further model, Hamilton20'21 modified his identification of R with Wright's coefficient ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/288694a0
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  • 8
    Electronic Resource
    Electronic Resource
    Dispersal in stable habitats (1977)
    [s.l.] : Nature Publishing Group
    Nature 269 (1977), S. 578-581 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Simple mathematical models show that adaptations for achieving dispersal retain great importance even in uniform and predictable environments. A parent organism is expected to try to enter a high fraction of its propagules into competition for sites away from its own immediate locality even when ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/269578a0
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  • 9
    Electronic Resource
    Electronic Resource
    ‘The Selfish Gene’ (1977)
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 102-102 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-Lewontin's review of Dawkins' book The Selfish Gene (17 March, page 283) is a disgrace. It fails to meet any of the standards of informative value, objectivity and fairness to the views of others that are part of the code of science. That it is a very biased review is reasonably evident to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/267102a0
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  • 10
    Electronic Resource
    Electronic Resource
    A search for nuclear structure effects in Tm169 (1962)
    Springer
    The European physical journal 167 (1962), S. 111-122 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The study of nuclear structure effects in internal conversion has been extended to the Tm169 nucleus. Gamma-gamma, electron-gamma and gamma-electron directional correlations of the 177 keV-131 keV and the 198 keV-110 keV cascades have been measured. The following results were obtained: $$\begin{array}{l} A_2 (177\gamma - 131\gamma ) = + 0 \cdot 275 \pm 0 \cdot 007,A_4 (177\gamma - 131\gamma ) = - 0 \cdot 005 \pm 0 \cdot 016, \\ A_2 (177\gamma - 131\gamma ) = + 0 \cdot 002 \pm 0 \cdot 007, \\ A_2 (177\gamma - 131K) = + 0 \cdot 497 \pm 0 \cdot 010, \\ A_2 (198\gamma - 110\gamma ) = + 0 \cdot 295 \pm 0 \cdot 007,A_4 (198\gamma - 110\gamma ) = - 0 \cdot 013 \pm 0 \cdot 017, \\ A_2 (198K - 110\gamma ) = + 0 \cdot 001 \pm 0 \cdot 008, \\ A_2 (198\gamma - 110K) = - 0 \cdot 005 \pm 0 \cdot 006. \\ \end{array}$$ . The results of the electron-gamma directional correlation measurements for the strongly retardedK-forbidden 177 keVM 1 transition are in agreement with the theory for smallλ-values. It is thus concluded that nuclear structure effects are not appreciable. For the retardedK-forbidden 198 keVM 1 transition the experimental results are also in agreement with theory for smallλ-values but do not exclude highλ-values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02144658
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