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  • Springer Nature  (4,526)
  • Nature Publishing Group  (3,519)
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  • 1990-1994  (8,045)
  • 1991  (8,045)
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  • 1
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The recombination of DNA molecules has been reconstituted in vitrousing two purified enzymes from Escherichia coli. RecA protein catalyses homologous pairing and strand exchange reactions to form intermediate DNA structures that are acted upon by RuvC. The newly identified RuvC protein resolves ...
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  • 2
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    Nature 354 (1991), S. 420-420 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] POOR rich Japan! For the past several months, a succession of visitors from the United States have been in Tokyo pleading for what in other contexts is called technical assistance (and which may often consist of mere money) with the construction of the Superconducting Super Collider ...
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  • 3
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    Nature 354 (1991), S. 422-422 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] London ONE of the two nuclear waste reprocessing facilities at the UK Atomic Energy Authority (AEA)'s plant in Dounreay, Scotland, has been shut down after plant managers found that they cannot account for some 10 kg of enriched uranium. The discrepancy may be simply due to an error ...
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  • 4
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    [s.l.] : Nature Publishing Group
    Nature 354 (1991), S. 422-422 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] London THE average Mexican academic has better access to supercomputers than his counterpart in Britain, according to a new report from the Parliamentary Office of Science and Technology (POST), the fledgling British answer to the US Congress's Office of Technology Assessment. ...
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  • 5
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    Nature 354 (1991), S. 425-425 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] London FRANCE'S polar research programme will next year be brought under one roof, with the opening of a new institute in Paris to coordinate the work of all French polar researchers. For Claude Lorius of the Centre National de la Recherche Scientifique (CNRS)'s Laboratory of ...
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  • 6
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    Nature 354 (1991), S. 425-425 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Hong Kong A DESPERATE shortage of college and university lecturers in Hong Kong has led seven government-funded tertiary institutions to combine forces in a search for academic staff overseas. The shortage stems from planned expansion of the territory's tertiary education system, ...
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  • 7
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    Nature 354 (1991), S. 518-520 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Depletion of high-field-strength elements (HFSE) is widespread in mantle clinopyroxenes1'3. The layer of HFSE-depleted mantle inferred from this depletion has been considered to be a geochemical feature with important petrologic implications. Salters and Hart4 have re-emphasized the ubiquity of ...
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  • 8
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Several Sey alleles have arisen independently, all of which are semidominant13'14. The phenotype found in mutant Sey mice is typified by the 15-day post coitum (p.c.) embryos in Fig. 1. The obvious defect in the heterozygous Sey/+ embryos (Fig. \b) is that the eyes are smaller than wild type ...
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  • 9
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    Nature 354 (1991), S. 432-433 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ADDED momentum to the molecular assault on the underlying cause of Alzheimer's disease will stem from the paper by Kawabata et al. that appears on page 476 of this issue1. The authors describe the most useful animal model yet for the disease - a mouse expressing a 100-residue ...
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  • 10
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    Nature 354 (1991), S. 434-435 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SEQUENCE similarities often spring surprises. A particularly striking example is the discovery, reported at a recent European Research conference Biology of Molecular Chaperones, University of Kent, Canterbury, 28 September-3 October 1991., and in part on page 490 of this ...
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  • 11
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    Nature 354 (1991), S. 437-438 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DISCONCERTING but true - deletion of the budding-yeast homologue of a gene encoding a protein involved in some seemingly crucial cellular process does not necessarily result in the death of the yeast cell. A further surprising example of this phenomenon is described by Hann and ...
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  • 12
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    Nature 354 (1991), S. 437-437 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MAKING monoclonal antibodies without the use of animals is a practical reality, report J. D. Marks era/. (J. molec. Biol. 222, 581-597; 1991). They show how antigen-specific antibody fragments can be selected from a library of recombinant immunoglobulin genes, which were cloned from ...
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  • 13
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    Nature 354 (1991), S. 437-437 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RESULTS from the deep northeast Pacific pour cold water on the notion that there is a mysterious 'fifth force' (M. A. Zumberge eta/. Phys. Rev. Lett. 67, 3051-3054; 1991). Discrepancies in gravity measurements from a mineshaft, and others revealed in Eotvos's legendary laboratory ...
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  • 14
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    Nature 354 (1991), S. 438-438 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MOTION sickness makes no biological sense. What possible evolutionary advantage can primitive man have gained from the disabling nausea and vomiting brought on by violent movement? Daedalus comments that motion sickness is a product of sensory conflict. It arises when our eyes and ...
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  • 15
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    Nature 354 (1991), S. 439-439 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Maddox1 and Anderson2, discussing the results of Stott et al.3A appear to differ on the key issue of whether or not the xenoreactive monkey sera bound SIV-encoded proteins (although Stott et al.4 reported no such reactivity was detected with purified envelope proteins). But ...
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  • 16
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    Nature 354 (1991), S. 440-440 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Maddox's otherwise helpful article1 began and ended unfortunately. I fear that the structure of its assessment of Hoffmann's and Stott's work is going to yield all sorts of bizarre press reports, leading to confusion among the general public. As I understand it, Duesberg ...
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  • 17
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    Nature 354 (1991), S. 424-424 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] New Delhi CONTROVERSY in India over the death of five tigers in a sanctuary in Karnataka State has led to closure of an Indian-US research project on tigers. Last week, state environment minister B. Basavalingappa ordered the confiscation of cameras and equipment used in the project ...
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  • 18
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    Nature 354 (1991), S. 424-424 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tokyo FOUR major US government agencies are planning to contribute several million dollars a year to Japan's Human Frontiers Science Programme, which supports international research on the brain and molecular biology, two senior officials from the US Department of Energy (DOE) said ...
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  • 19
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    Nature 354 (1991), S. 445-452 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Despite their lack of long-range translational and orientational order, covalent amorphous solids can exhibit structural order over both short and medium length scales, the latter reaching to 20 Å or so. Medium-range order is difficult to measure experimentally and to interpret ...
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  • 20
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In a longitudinal study of HIV seropositive patients, there were fluctuations in the specificity of cytotoxic T cells for the virus. This was matched by variability in proviral gag DNA epitope sequences in the lymphocytes of these patients. Some of these viral variants are not ...
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  • 21
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] By using a fixed arrangement (see Fig. 1) in which an energy- t To whom correspondence should be addressed. dispersed geometry developed for dynamic X-ray absorption studies5"7 has been augmented with a curved, position-sensitive detector, we have recorded low-resolution X-ray ...
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  • 22
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Small pockets of uranium ore at Oklo went critical 1,95F0± 30 Myr ago6, producing several natural fission reactors. Reactors 1-6 contain virtually no organic matter. Total energy production in these reactors was 16,500 MWyr. Roughly 6 tons of 235U fissioned; the total uranium ...
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  • 23
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    Nature 354 (1991), S. 430-431 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ASTRONOMERS try to learn how galaxies have evolved over time by observing objects at great distances from us, which we see as they were when the Universe was younger. Over the past decade, improved observational techniques have allowed the investigation of ever more distant samples ...
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  • 24
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    Nature 354 (1991), S. 431-431 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FROZEN carbon monoxide and dioxide have been discovered on Triton, Nep tune's largest moon, D. P. Cruickshank (NASA Ames) and colleagues reported at a meeting last month on planetary sciences Division for Planetary Sciences of the American Astronomical Society, Palo Alto, 4-8 ...
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  • 25
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 The isolation of ASxrb DNA and the identification of exonic sequences on the Y chromosome, a, The ASxrb DNA is represented by the thick black line and the Sxr DNA remaining in the Sxrto region by the broken line. The breakpoints of the deletion are shown by the gaps in the Zfy ...
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  • 26
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] TF55 was purified from the soluble portion of Triton X-100 cell extracts by anion exchange chromatography and glycerol gradient sedimentation. Most of the TF55 sedimented in the gradient at 20S (Fig. la). No nucleic acid was found by spectro-photometry in the 20S fraction, suggesting that ...
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  • 27
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    Nature 354 (1991), S. 339-340 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] ONE thing is sure about science now in what, for want of a better name, is still called the Soviet Union. Science is quickly coming to an end. In the past few days, several appeals for help have been circulating in the West, while the Moscow State University has made a public appeal ...
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  • 28
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    Nature 354 (1991), S. 341-341 
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    Notes: [Auszug] DAVID Baltimore, the embattled president of Rockefeller University, announced early this week that he would resign his position at the end of the month. In a 2 December letter to the Rockefeller board of trustees, Baltimore wrote that the continuing misconduct investigation focused ...
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  • 29
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    Nature 354 (1991), S. 342-342 
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    Notes: [Auszug] Tokyo IN an unusual move, a powerful pressure group has been formed within Japan's ruling Liberal Democratic Party (LDP) to push for dramatic increases in government spending on research. The pressure group, called the 'special committee to reinforce maintenance of the basic research ...
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  • 30
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    Nature 354 (1991), S. 344-345 
    ISSN: 1476-4687
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    Notes: [Auszug] Denver, Colorado A DECADE after the United States ended its frantic spending on renewable energy research - a binge triggered by the oil crises of the 1970s and killed by the failure of alternative energy sources to live up to their promise - renewable energy has finally come of age. ...
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  • 31
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    Nature 354 (1991), S. 441-441 
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    Notes: [Auszug] Oil-laden desert in Kuwait. Reproduced from Tides of War: Eco-disaster in the Gulf by Michael McKinnon and Peter Vine, a graphic and dramatic account of the ecological disruption ensuing from the Gulf conflict. Published by Boxtree, price is ...
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  • 32
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    Nature 354 (1991), S. 443-444 
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    Notes: [Auszug] SEMICONDUCTORS have been single-handedly responsible for the miniaturization of electronic circuits, which has reduced the cost and increased the reliability of electronic components, and, more importantly, reduced signal-propagation times. With integrated circuits, the entire ...
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  • 33
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    Nature 354 (1991), S. 444-444 
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    Notes: [Auszug] CONSIDER the following propositions. The essence of science is prediction; the best way to make predictions is to regress variables one against the other; the more extravagant goals of science, for instance, that it should seek to understand what is going on, are unnecessary; ecology ...
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  • 34
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    Nature 354 (1991), S. 460-461 
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    Notes: [Auszug] The B-band galaxy number counts rise rapidly with magnitude at least to B ~ 26, at which point the cumulative galaxy density is ~3 x 105 per square degree (refs 1,2). Comparison with a numerical model that assumes no luminosity evolution in the galaxy population and an invariant ...
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  • 35
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] The K3C60 sample was prepared by reaction of K^ 6C60 and C60 in a sealed evacuated pyrex tube at 250 °C for 3 days, 350 °C for 24 hours and 250 °C for 8 days12. Phase purity was confirmed by X-ray diffraction measurements and Rietveld refinement of high-resolution ...
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  • 36
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    Nature 354 (1991), S. 463-465 
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    Notes: [Auszug] K6[VI1^As6O42(H2O)]. 8 H2O was prepared as described previously11. It has a crystallographically imposed trigonal symmetry11 (space group R3c, No. 167), as shown in Fig. la. The overall structure is quasispherical, with three sets of (non-equivalent) vanadium atoms, V\, V2 and V3. Vl ...
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    Nature 354 (1991), S. 357-357 
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    Notes: [Auszug] WILL discotheques of the future echo to the beat of the fractal drum, described in Physical Review Letters (67, 2974-2977; 1991) by B. Sapoval and colleagues? The drum was designed to test the notion that fractal borders may influence the behaviour of waves, particularly the damping of waves. The ...
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  • 38
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    Nature 354 (1991), S. 362-362 
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    Notes: [Auszug] SIR - The existence of a planet in orbit around a neutron star, reported by Bailes et al.1, was actually predicted2'3 by the science-fiction writer Poul Anderson in a novel first published in 1958. Anderson also predicted that a neutron star would possess "The most powerful bloody ...
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    Nature 354 (1991), S. 363-364 
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    Notes: [Auszug] SIR - Because they did not observe a fast response to (3-adrenergic stimulation in adult guinea-pig cardiac myocytes as we reported7, Hartzell et al.1 claim that the response does not exist. In our view, this is a version of the 'all swans are white' argument; the figure (over page) ...
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    Nature 354 (1991), S. 374-376 
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    Notes: [Auszug] The quasar 3C273 is unusual in many respects, both in its very high optical and X-ray brightness, and also in its superluminal and other radio properties. On kiloparsec scales, it is unusual in that all the radio emission comes from a core coincident with the optical quasar with a ...
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    Nature 354 (1991), S. 376-377 
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    Notes: [Auszug] The Local Group galaxies M31 and M33 contain a nucleus, that is, a small, high-density star cluster inside the core which acts as a separate dynamical component. Also, M32 contains a tiny core; although not a separate dynamical entity, it nevertheless has a central density and core ...
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  • 42
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    Notes: [Auszug] The general transcription factor HE (TFIIE) is an essential component of the eukaryotic RNA poly-merase II initiation complex. We have isolated human complementary DNA clones for both the subunits of TFIIE. Using purified recombinant proteins we find that both subunits are essential ...
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    Nature 354 (1991), S. 380-382 
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    Notes: [Auszug] The temperature maxima and minima of the jovian oscillation are centred on the equator, with maxima in 1980, 1984 and 1989-90, and minima in 1982-83 and 1986-87. Figure 1 shows temperature profiles for two pairs of years having opposite phases of the equatorial temperature structure. ...
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  • 44
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    Notes: [Auszug] Pedigree A (Fig. la) shows a small portion of the HYPP pedigree used for the original linkage analysis with the human a-subunit gene4. Total RNA was made from a muscle biopsy from patient IV-1 (pedigree A) and from individuals with unrelated neuromuscular disorders. RNA was ...
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    Nature 354 (1991), S. 392-394 
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    Notes: [Auszug] It was originally proposed that the afil complex had a Stokes radius identical to that of a globular protein7 of relative molecular mass 270,000 (Mr 270 K) because it contained a chondroitin sulphate-modified form of the I chain8. However, it has since been shown that only a small ...
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  • 46
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    Notes: [Auszug] Partial amino-acid sequences of human TFIIE-a was determined from five cyanogen bromide peptides (underlined regions in Fig. 1). With primers based on these sequences, polymerase chain reaction (PCR) and plaque hybrydization techniques were used to isolate partial TFIIE-a cDNA clones ...
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    Nature 354 (1991), S. 363-363 
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    Notes: [Auszug] SIR - Hartzell et al.1 concluded that a membrane-delimited pathway for modulation of calcium channels by the stimulatory guanine nucleotide-binding protein Gs does not function in amphibian and mammalian cardiomyocytes. Because their conclusion regarding mammalian cardiomyocytes ...
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    Nature 354 (1991), S. 364-364 
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    Notes: [Auszug] Harizell Et al. Reply The purpose of our paper1 was to test the hypothesis7 that a direct G-protein pathway is necessary to explain the effects of sympathetic nerve stimulation on heart. We do not conclude that direct G-protein mechanisms do not exist. Rather, we document that under ...
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    Nature 354 (1991), S. 367-367 
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    Notes: [Auszug] THE cover of this volume features the theme of life, with Adam handing Eve a tile depicting the first element in the periodic table. Tiles for the biologically important alkali and alkaline earth metals, sodium, potassium, magnesium and calcium, nine transition metals, and the ...
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    Nature 354 (1991), S. 368-368 
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    Notes: [Auszug] Heliconius charitonia (zebra butterflies). The farthest butterfly is marked as part of a capture-release study. From Sarapiqui Chronicle: A Naturalist in Costa Rica by Alien M. Young. Smithsonian Institution Press, $40 (hbk), $16.95 ...
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    Nature 354 (1991), S. 368-368 
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    Notes: [Auszug] How does one-dimensional DNA guide three-dimensional development? Colour patterns, which develop in only two dimensions, are simplified systems that could provide insights into this riddle. So it is perhaps surprising that virtually no biologists study manipulable pattern systems ...
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    Nature 354 (1991), S. 265-267 
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    Notes: [Auszug] IN January, the news media were full of stories concerning a record near-miss of the Earth by an asteroid. On page 287 of this issue, Scotti et a/.1 give the definitive view of their discovery of that asteroid (1991 BA), which sparked interest - and some alarm - around the world. In September ...
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    Nature 354 (1991), S. 408-410 
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    Notes: [Auszug] Models based on the X-ray structure of the colicin A pore-forming domain have been proposed for the first step of its electrostatic membrane insertion mechanism and for the resulting structure of the inserted monomer in the absence of membrane potential12'13. These are largely ...
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    Nature 354 (1991), S. 291-293 
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    Notes: [Auszug] Poly(ethyloxazoline) (PEOx) and either poly(methacrylic acid) (PMAA)17 or poly(acrylic acid)18 form complexes by means of intermolecular hydrogen bonding between carboxylic and oxazoline groups. There are two possible sites in an ethyl-oxazoline repeat unit for hydrogen bonding with carboxylic ...
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    Nature 354 (1991), S. 298-301 
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    Notes: [Auszug] The tibia (University Museum, Oxford, specimen OUM D793) lacks the proximal articular surface and posterior margin, but like the other specimens it is otherwise well preserved and undistorted (Fig. la-e). Because the proximal part of the anterior surface is flared, as would be expected near ...
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    Nature 354 (1991), S. 296-298 
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    Notes: [Auszug] Terrane accretion and subduction, thrusting, deformation, regional metamorphism and magmatic thickening of the Coast orogen characterized the northern North American cordillera between 110 and 50 Myr (ref. 2). Rapid uplift of the orogen core occurred during the last 15 million years of this ...
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    Nature 354 (1991), S. 301-304 
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    Notes: [Auszug] We have called the cloned channel C1C - 1 to distinguish it from the Torpedo channel (C1C-0)4 and a recently cloned different mammalian Cl~ channel, C1C-2 (A. Thiemann, S. Griinder, M. Pusch and T.J.J., manuscript in preparation). The predicted protein (994 amino acids, relative molecular mass ...
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    Nature 354 (1991), S. 259-259 
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    Notes: [Auszug] Tokyo HUMAN error, defectively made technology, inadequate inspection procedures and lack of instructions for dealing with emergencies lay behind Japan's worst nuclear power accident, which occurred at the Mihama nuclear power plant last February, according to a final report on the accident ...
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    Nature 354 (1991), S. 259-259 
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    Notes: [Auszug] Washington IT may not be a fearsome investigative operation like that of Representative John Dingell (Democrat, Michigan), but the investigations and oversight subcommittee of the House of Representatives Science, Space and Technology (SS & T) committee is starting to show some of the same ...
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    Notes: [Auszug] We have shown that insulin stimulates transcription of the glyceraldehyde-3-phosphate dehydrogenase (GAPDH) gene in 3T3 adipocytes and we have mapped the response element IRE-A to nucleotides -488 to -435 in the 5'-flanking region of this gene1. The ability of an insulin-responsive protein, ...
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    Nature 354 (1991), S. 261-261 
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    Notes: [Auszug] SIR - London Zoo is in crisis. It has operated at a loss for a decade. The zoo's executives, the council of the Zoological Society of London (ZSL) who put them in place, and the society's fellows can all agree on that. Closure has been threatened, and used to menace the public (with ...
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    Nature 354 (1991), S. 262-262 
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    Notes: [Auszug] SEVERAL theories have been proposed to explain the origins of the AIDS epidemic1'2. Most have been speculative rather than testable and several have caused offence3, particularly those which refer to sexual practices with monkey blood. The important question of the origin of human ...
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    Nature 354 (1991), S. 264-265 
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    Notes: [Auszug] STRIKING news for students of human disease and intermediate filaments comes in a series of five reports1"5 from three different groups. Not only do they identify the underlying cause of epider-molysis bullosa simplex (EBS), one of several inherited disorders characterized by blistering of the ...
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    Nature 354 (1991), S. 330-331 
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    Notes: [Auszug] Galileo's Revenge: Junk Science in the Courtroom. By Peter W. Huber Basic Books: 1991. Pp.274. $23. As an 'expert witness' on legal matters related to claims of alleged occult phenomena, I have often testified in court about specific and general findings in the field. So I thought I knew a ...
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    Nature 354 (1991), S. 332-332 
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    Notes: [Auszug] Linking the Natural Environment and the Economy. Edited by C. Folke and T. Kaberger. Kluwer: 1991. Pp. 305. Dfl.50, $100, £52. Values for the Environment. By J. T. Winpenny. HMSO: 1991. Pp. 277. £14.95. ENVIRONMENTALISTS have much to learn from economists. ...
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    Nature 354 (1991), S. 334-335 
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    Notes: [Auszug] The Cosmic Water Hole. By Emmanuel Davoust. MIT Press: 1991. Pp. 206. $19.95, £17.95. NEXT year, on Columbus Day, US researchers will begin a ten-year, $100-million programme to search for extraterrestrial intelligence. Davoust, a French astronomer, provides a very readable ...
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    Nature 354 (1991), S. 271-272 
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    Notes: [Auszug] SIR - Despite the importance of the rainforests of the Amazon basin to greenhouse gas fluxes, terrestrial carbon storage and global biodiversity1'2, there remains no consensus as to the nature of vegetation present in the region during the Last Glacial Maximum (LGM) . Although there is broad ...
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    Nature 354 (1991), S. 273-277 
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    Notes: [Auszug] Palaeomagnetic data from lavas produced at the Hawaii and Society Islands hotspots suggest that one or more specific, long-lived field configurations recur during successive polarity reversals spanning perhaps several million years. The apparent quasistationarity of these states and the ...
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    Nature 354 (1991), S. 278-284 
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    Notes: [Auszug] The crystallographically determined structure of simian virus 40 shows that the 72 pentamers of viral protein VP1, which form the outer shell, have identical conformations except for the C-terminal arms of their subunits. Five arms emerge from each pentamer and insert into neighbouring ...
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    Nature 354 (1991), S. 287-289 
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    Notes: [Auszug] Our instrumentation and observing technique have been described elsewhere1"3. Briefly, we use a Tektronix TK2048 CCD located at the newtonian focus in scanning mode. With the telescope drive turned off, the accumulating charges in the CCD are read out so that the rate of line transfers matches ...
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    Nature 354 (1991), S. 293-296 
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    Notes: [Auszug] A transect was followed from close to the Equator to the Gulf of Oman during September and October 1986, and dissolved methane was measured in the atmosphere, and from the sea surface to the bottom at 13 stations. Figure 1 shows that methane concentrations varied considerably with depth, being ...
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    Notes: [Auszug] We first investigated whether in myotonic mice changes in the muscle chloride channel gene can be detected by genomic Southern analysis (Fig. 1). Using a rat muscle Cl~ channel (C1C-1)19 probe, aberrant fragments were indeed found in ADR (adr/adr) mice with several restriction nucleases, and ...
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    Nature 354 (1991), S. 308-311 
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    Notes: [Auszug] To test for peripheral deletion double-transgenic (Dbl-Tg) mice were produced by mating mice bearing the MT-Kb trans-gene, which targets expression of the membrane major histocompatibility complex (MHC) class I antigen Kb to the liver10, with 3-83^5 mice (Ig-Tg), which are transgenic for heavy ...
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    Nature 354 (1991), S. 314-317 
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    Notes: [Auszug] An antisense oligodeoxynucleotide (ODN) was generated against a sequence element of Xenopus cyclin A mRNA not present in either Xenopus cyclin Bl or B2 mRNAs4'10. When this ODN was added to a wheat-germ lysate translation system (which contains RNase H, ref. 12), it inhibited the efficient ...
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    Nature 354 (1991), S. 210-212 
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    Notes: [Auszug] Most of the light emitted by an elliptical galaxy originates in a smooth component with ellipsoidal contours and a surface density profile well approximated by the Rl/4 law of de Vau-couleurs10. Recent surveys indicate, however, that most ellipticals also possess weak features, ...
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    Nature 354 (1991), S. 212-214 
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    Notes: [Auszug] The hypothesis7'8 that most elliptical galaxies are formed by the merging of spiral galaxies is strongly supported by recent observations9"12. N-body simulations have shown that merging of two spiral galaxies produces elliptical galaxies4. Such simulations have not, however, been ...
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    Nature 354 (1991), S. 217-218 
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    Notes: [Auszug] We have developed Agl-based glassy materials, which have high ionic conductivities (10~3-10~2 S cm"1) at ambient temperature, by combining Agl and silver oxosalts or oxides8'10. FIG. 1 X-ray diffraction patterns for the melt-quenched samples with different cooling rates and ...
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    Nature 354 (1991), S. 218-221 
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    Notes: [Auszug] We have used two parallel approaches. The first is to change the global concentration of defects in the system: we tune the defect concentration not by changing the temperature but by changing the density of the simulated system14. This method enables us to distinguish between ...
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    Nature 354 (1991), S. 329-329 
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    Notes: [Auszug] To Interpret the Earth: Ten Ways to be Wrong. By Stanley A. Schumm. Cambridge University Press: 1991. Pp. 134. £20, $24.95. "THE moment I hear the word philosophy I reach for my hammer." Such, I suspect, might be the sentiment of many a geologist, and for that reaction I am ...
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    Nature 354 (1991), S. 173-173 
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    Notes: [Auszug] Washington ANYONE who has ever contemplated the sobering prospect of an investigation by Representative John Dingell (Democrat, Michigan) or an inquiry by freelance science cop Walter Stewart can appreciate the irony: Stewart, backed by an attorney representing Dingell's committee, ...
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    Nature 354 (1991), S. 93-94 
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    Notes: [Auszug] MR Robert Maxwell, the publishing tycoon who died last week, had been an important influence on the business of science since the early 1960s. He was one of the first to recognize that the Soviet Union was bursting with excellent science. His Pergamon Press performed an important ...
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    Nature 354 (1991), S. 95-95 
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    Notes: [Auszug] Focus shifts from misconduct to perjury o One court has already rejected caseWashington US CONGRESSIONAL investigators, frustrated by their failure so far to obtain a conclusion of scientific misconduct in the case of AIDS researcher Robert Gallo, have launched a second line of ...
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    Nature 354 (1991), S. 96-96 
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    Notes: [Auszug] Washington & London EVEN as UK scientists criticized the US National Institutes of Health (NIH) for raising the spectre of commerce in trying to patent gene sequences, the UK genome project has been holding its sequences secret while it prepares to sell them to industry. Over the ...
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    Nature 354 (1991), S. 97-97 
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    Notes: [Auszug] London MINISTERS from the 13 countries that form the European Space Agency (ESA) will gather in Munich next week to consider Europe's future in space - the first meeting of its type since the Hague conference of 1987 (see Nature 330, 195; 1987), when the ESA states (apart from ...
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    Notes: [Auszug] London UNDER pressure from ten of its fellows, the British Psychological Society is reconsidering its 1980 public discrediting of Sir Cyril Burt, the author of controversial publications on the inheritance of intelligence in children. Burt, who died in 1971, was responsible in the ...
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    Nature 354 (1991), S. 100-100 
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    Notes: [Auszug] Cape Town SOUTH Africa is to embark on major expansion of its Antarctic programme, including the building of a new research station, SANAE 4, and the refurbishment of its polar supply ship, the 5^4 Agulhas, to improve its oceanographic research facilities. The site earmarked for the ...
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    Nature 354 (1991), S. 101-101 
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    Notes: [Auszug] SIR - As one who accepts both darwi-nian evolution and orthodox Christianity, I generally appreciated David Hull's review of Darwin on Trial (Nature 352, 485; 1991). I disagree, however, with his statement that the "God of the Galapagos is careless, wasteful, indifferent, almost ...
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    Nature 354 (1991), S. 103-103 
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    Notes: [Auszug] New York TRAGIC though the circumstances are, the announcement last week that 'Magic' Johnson, the outstanding member of the Los Angeles Lakers basketball team, is infected with human immunodeficiency virus (HIV) may yet be the most effective means of getting rid of the confusion ...
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    Nature 354 (1991), S. 105-106 
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    Notes: [Auszug] THE second fundamental code in molecular biology - how a protein's tertiary structure is coded by its amino acid sequence - has yet to be cracked. But Benner and Gerloff1, Bowie et a/.2, and Finkelstein and Reva3 suggest alternative ways forward which offer real hope for progress in ...
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    Nature 354 (1991), S. 191-191 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the classic physics experiments of this century has been reincarnated by radioastronomers who measured the deflection of radio waves from the distant galaxy P0201+113 as they passed close to Jupiter (Astr. J. 102, 1879-1888; 1991). The classic experiment was by Arthur ...
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  • 91
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    Nature 354 (1991), S. 191-191 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] JUST as canaries were used to warn of gas in mines, brachiopods could be used as indicators of climate change in the geological record say G. B. Curry and K. Endo (Geology ±9, 1101-1103; 1991). Over the past 10,000 years, Terebratulina retusa has spread from the Canary Islands ...
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  • 92
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    Nature 354 (1991), S. 193-193 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - There is growing interest among policymakers about the cost of alternative approaches for reducing emissions of carbon dioxide. Particular attention has been paid to the use of energy taxes to limit emissions. Our analyses1'2 suggest that the problem of designing an efficient ...
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  • 93
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    Nature 354 (1991), S. 194-194 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Following the report in Scientific Correspondence of the invasion of the River Rhine by the immigrant amphipod Corophium curvispinum (var deviuml}, I would like to provide an update on the distribution of this species in Britain, where it has also become locally abundant in ...
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  • 94
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    [s.l.] : Nature Publishing Group
    Nature 354 (1991), S. 196-196 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHY is an illuminated mesophyll cell like a starving rat? Because it too performs gluconeogenesis, but in miniature. The cytoplasm of the mesophyll cell receives trioses from the chloroplast for conversion to sucrose. In the rat, glycerol from adipose tissue, and lactate and alanine ...
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  • 95
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    Nature 354 (1991), S. 114-114 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Does the thixotropic mixture manufactured by L. Garlaschelli et al. (Nature 353, 507; 1991) meet all three criteria for the 'miracle'? First, frothing occurs following liquefaction; second, liquefaction takes up to 30 minutes and frequently longer to occur; and third, ...
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  • 96
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    Nature 354 (1991), S. 204-209 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Most DNA typing systems used in forensic and legal medicine assay allelic length variation at tandem repetitive DNA regions such as minisatellites. A simple alternative approach that displays patterns of variant repeat units along minisatellite alleles is described here. This ...
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  • 97
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    Nature 354 (1991), S. 199-203 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A tomographic image of the seismic structure beneath the Kenya rift shows its three-dimensional character. In the lower crust, an axial zone of high seismic velocity varies in width and magnitude along the axis, suggesting that the amount of crustal modification also varies along the ...
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  • 98
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    Nature 354 (1991), S. 214-216 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The method of generating a sub-wavelength spot of light is an important aspect of near-field imaging. The first approach used was to impress a small sub-wavelength aperture in a flat metal screen and to use it as an aperture for a larger light source6. Although the method was used ...
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  • 99
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    Nature 354 (1991), S. 223-227 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Combined seismic refraction and wide-angle reflection profiling yields reduced time record sections from which the relation of travel time and amplitude to distance can be determined for particular seismic phases travelling through the Earth. For the three profiles completed during the Kenya ...
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  • 100
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The compound eye of Drosophila is composed of 800 ommatidia, or unit eyes, each of which contains eight photoreceptor neurons6. These eight cells can be divided into three classes: R1-R6, R7 and R8 (ref. 7). R1-R6 cells express a blue-absorbing rhodopsin, Rhl (refs 8, 9), and are the ...
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