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  • 1997  (12,451)
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  • 101
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    [s.l.] : Nature Publishing Group
    Nature 386 (1997), S. 562-563 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Despite worldwide concern about habitat degradation in the tropics, deforestation in tropical countries continues unabated1. In 1979, 75,000 km2 was deforested, but by 1991 this figure had increased to 132,000 km2 (ref. 2). The underlying causes of deforestation are, however, poorly understood. ...
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  • 102
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    Nature 386 (1997), S. 565-565 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] If Daniel Defoe were alive today, he would be known as a science writer on the strength of his A Journal of the Plague Year (1722). Richard Rhodes and Rodney Barker's books are journals of our own plague years. The authors, both of whom are journalists, differ in style, comprehensibility and ...
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  • 103
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    Nature 386 (1997), S. 567-568 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The ability to see through our bodies has shown us rather more these past one hundred years or so since X-rays and radioactivity were discovered than we may have realized. Until I read this book by Bettyann Kevles I had no idea that the discovery of X-rays was the inspiration for H. G. Wells to ...
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  • 104
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    [s.l.] : Nature Publishing Group
    Nature 386 (1997), S. 592-595 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The THC is driven by the north-south gradient in water density created by atmospheric thermal forcing and weakened by the north-south salinity gradient maintained by air-sea exchange of fresh water (FW) due to subtropical evaporation and high-latitude precipitation. The present-day stable THC is ...
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  • 105
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    Nature 386 (1997), S. 598-601 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Figure 1 Apparent position of a vertical bar briefly flashed at positions - 20° (squares), 0° (triangles) or +20° (circles), as a function of time relative to saccade onset. Each point represents a single observation. Saccades from F0 to FT are indicated by the dashed line. The solid ...
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  • 106
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Imaging studies in humans have shown that both visual and prefrontal cortices are active during visual working memory tasks, but these studies did not have sufficient temporal resolution to distinguish transient activity during stimulus presentation from sustained activity after the stimulus is ...
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  • 107
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    [s.l.] : Nature Publishing Group
    Nature 386 (1997), S. 623-627 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Aneuploidy occurs frequently in colorectal and other cancers3. There are many potential causes for this aneuploidy, and it is unknown whether aneuploidy is associated with a persistent defect in chromosome segregation. We therefore studied eight commonly used colorectal cancer cell lines, four of ...
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  • 108
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    [s.l.] : Nature Publishing Group
    Nature 386 (1997), S. 421-421 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Europe's particle physicists can face the future with a fair degree of satisfaction. Following recent international endorsements of CERN, they are set to occupy centre stage in the next generation of facilities at the high-energy frontiers of their discipline. European astronomers, in contrast, are ...
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  • 109
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    [s.l.] : Nature Publishing Group
    Nature 386 (1997), S. 423-423 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The US editorial offices of Nature Genetics, Nature Medicine and Nature Structural Biology will shortly move from Washington DC to join Nature Biotechnology in New York. The US editorial office of Nature itself will remain in Washington. From 1 May 1997, editorial enquiries, manuscript ...
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  • 110
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    Nature 386 (1997), 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] The Weizmann Institute in Israel launched on 31 March an expanded communications network to provide countries in eastern Europe and Asia with access to on-line molecular databanks and training in their use. The International Center for Cooperation in Biolnformatics (ICCB), which is ...
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  • 111
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    Nature 386 (1997), S. 437-438 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Controlled degradation of proteins inside the cell is central to many processes, ranging from cell-cycle control and differentiation to the cellular immune response. The targeted protein is marked for destruction by the covalent attachment of a small protein called ubiqui-tin and, following ...
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  • 112
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    Nature 386 (1997), S. 438-439 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] On 23 February 1987, SN1987A came howling into the world of astrophysics, the brightest supernova since SN1604 was seen by Kepler. Astronomers were astonished that its parent was a blue giant star, startled by its triple-ring system, and disappointed not to find the pulsar that should have been ...
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  • 113
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    Nature 386 (1997), S. 445-445 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] 100 years ago Prof. Schiaparelli has just published an account of his observations of Mars made during the years 1883-84. These observations are contained in the publication of the Reale Accademia del Lincei, 1895-96, and are accompanied by a new chart of the surface-markings and eight diagrams ...
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  • 114
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    Nature 386 (1997), S. 448-448 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the exuberant world of present-day gravity physics, it is hard to picture research four decades ago when you could count the active people on your ringers. Bob Dicke, who died on 4 March, was a leader in this change, most famously in the discovery of thermal radiation from the Big Bang, which ...
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  • 115
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    Nature 386 (1997), S. 452-452 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The folded surface of the cerebral cortex contains a mosaic of functionally distinct areas, connected by a network of nerve fibres in the sub-cortical white matter. This network determines, in part, the computations that the cortex performs. The folds help to fit the large sheet-like cortex into a ...
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  • 116
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    Nature 386 (1997), S. 450-451 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] With few exceptions1, models used to predict the effect of harvesting on animal populations disregard males2. However, the killing of adult males can reduce population growth if, for example, immigrant males that replace a removed resident male kill the young1'3. In a field study of brown bears, ...
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  • 117
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    Nature 386 (1997), S. 449-450 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Ancient hunters in southern Peru used spear points and knives made of volcanic glass (obsidian). We have located the source of the vast majority of this obsidian; a quarry on the slopes of the Cotallalli volcano in the south central Andes. Chemical analysis of obsidian from this source as well as ...
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  • 118
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    Nature 386 (1997), S. 472-474 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Details of the mechanism generating the maser emission in astrophysical sources (megamaser galaxies and, in our own galaxy, star formation regions and winds from evolved stars) are still uncertain. For the megamaser galaxies a good correlation exists between OH maser luminosity and the square of ...
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  • 119
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    Nature 386 (1997), S. 480-482 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The annual riverine discharge (-0.4 X 1015 g) of DOM and particulate organic matter to the oceans8 consists primarily of the degraded remains of terrestrial vegetation and is considered to be refractory to biodegradation9'10. Terrigenous DOM has characteristically elevated C/N ratios, depleted ...
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  • 120
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    Nature 386 (1997), S. 482-484 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Linear elastic fracture mechanics (LEFM) theory has been successfully applied to many aspects of rock fracture2, including fault displacement3 and dyke aperture distributions4. When integrated with numerical methods for stress analysis, LEFM models can accurately simulate the propagation of ...
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  • 121
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    Nature 386 (1997), S. 493-495 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has long been known that experience-dependent neuroanato-mical plasticity occurs in the rat brain5'9. Environmental enrichment or the 'combination of complex inanimate and social stimulation'10 has been used to induce experience-dependent neu-roplasticity. Morphological changes in the ...
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  • 122
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    Nature 386 (1997), S. 522-522 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nature is a weekly international journal covering all the sciences. Its readership is interdisciplinary, so manuscripts should be written clearly and simply, authors remembering that English is not the first language of many readers. Competition for Nature's limited space is severe, so brevity is ...
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  • 123
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    Nature 386 (1997), S. 307-307 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Like many countries in the West, the United Kingdom looks admiringly at the growth rates of economies in the Far East and perceives a domestic need for skilled workforces and strong value-adding innovation in services and manufacturing. Those tigerish economic statistics partly reflect a number of ...
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  • 124
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    Nature 386 (1997), S. 310-310 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] [MUNICH] The resumption of violence in Northern Ireland is having a major impact on its two universities, as money to develop research facilities is being cut to help pay for extra security measures in the province. For the next academic year, which starts in August, the Northern Ireland ...
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  • 125
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    Nature 386 (1997), S. 312-312 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] [WASHINGTON] Guidelines for legislation to prevent discrimination by employers against individuals on the basis of their genetic characteristics was made public last week by a consortium of US government advisers on the social and ethical implications of genetic research and breast cancer ...
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  • 126
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    Nature 386 (1997), S. 312-312 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] [WASHINGTON] The National Institutes of Health (NIH) are likely to contest a decision by US patent officials to allow the patenting of expressed sequence tags (ESTs) - short sequences of DNA that uniquely identify full-length expressed genes. Last Friday (21 March), the NIH sent a letter to ...
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  • 127
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    Nature 386 (1997), S. 318-318 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir- The postmodernist ideas about the nature of scientific knowledge described in a recent News story (Nature 385,381; 1997) are not new and have already been overtaken by the history of science. I was educated in Czechoslovakia during the Lysenko era. Empirical genetics was considered an ...
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  • 128
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    Nature 386 (1997), S. 320-320 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir - I read with interest the News story about the issues raised by Japan's demography, showing that a dramatic increase in population age is being accompanied by a decrease in the number of financially productive individuals (Nature 385,379; 1997). The extrapolations that can be made from ...
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  • 129
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    Nature 386 (1997), S. 318-318 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir-P.-L. Chau and W. Y. Chau (Nature 385,110; 1997) dissent from a leading article (Nature 384,197; 1996) apparently linking the lack of creativity in Korea to a culture deeply influenced by Confucian thought. But who said Confucian-influenced Asians have to be cnon-creative' or even Confucian? We ...
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  • 130
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    Nature 386 (1997), S. 319-319 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir - In his letter "Flawed reasoning about oil and gas", Maurice B. Dusseault (Nature 386,12; 1997) criticizes the review by Peter Kassler of a book by Marcello Colitti and Claudio Simeoni entitled Perspectives of Oil and Gas: The Road to Independence (Nature 384,528; 1996). Both the review and ...
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    Nature 386 (1997), S. 319-319 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir - Simon Wain-Hobson is by no means the first to express dissatisfaction with the refereeing of papers, and won't be the last (Nature 385,384; 1997). I second his proposal for reviews to be of a sufficient length - say 10 per cent of the paper's length for a rejection, 5 per cent otherwise? ...
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  • 132
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    Nature 386 (1997), S. 320-320 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir- Our laboratories are currently determining the complete nucleotide sequences of the genomes of the obligate human pathogens Streptococcus pyogenes and Neisseria gonorrhoeae, sponsored by the National Institute of Allergy and Infectious Diseases (NIAID) of the US National Institutes of Health ...
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  • 133
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    Nature 386 (1997), S. 321-322 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Every columnist in the English-speaking press seems to have had a say about last December's resolution by the governing board of the Oakland Unified School District in California. The board's proposal was to recognize the native tongue of most of its pupils as a language, which triggered an ...
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  • 134
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    Nature 386 (1997), S. 323-324 
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    Notes: [Auszug] When Cinderella's (or Ashiepattle's, according to the brothers Grimm) wicked stepsisters threw her lentils into the ashes of her cooking fire, salvation came in the form of the friendly birds who helped her to sort them. But had she read the report by Makse et al on page 379 of this issue1, she ...
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    Nature 386 (1997), S. 327-329 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In forests on hillsides, the trunks of the understorey trees may lean outwards from the slope, although the canopy trees are more vertical (Fig. la, overleaf). Two main theories have been put forward to explain this phenomenon - that it is caused either by the wind or by disturbances such as ...
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    Nature 387 (1997), S. 437-437 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nobody knows for certain what it's going to be like in Hong Kong over the next few years, but pessimists point to two alternative ways in which the 'special administrative region', as it will be known after its handover to China on 30 June, could tumble from its estimable position at eighth in the ...
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    Nature 387 (1997), S. 439-439 
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    Notes: [Auszug] [WASHINGTON] The idea of igniting fusion in a deuterium or deuterium-tritium target by means of conventional high-explosives (see above) has long fascinated both those who saw the concept as a potentially limitless energy source and those who viewed it as a quick route to a simple, devastating ...
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    Nature 387 (1997), S. 440-440 
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    Notes: [Auszug] [WASHINGTON] A modified agreement for US participation in the Large Hadron Collider project at the European Laboratory for Particle Physics (CERN) has been accepted by James Sensenbrenner (Republican, Wisconsin), chairman of the Science Committee in the House of Representatives, who had previously ...
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    Nature 387 (1997), S. 440-440 
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    Notes: [Auszug] [MUNICH] Fifty-eight gold-plated X-ray mirrors nested together in shells, and separated by a distance of only 1-4 mm, form the telescopes on the European Space Agency's next cornerstone mission, an X-ray satellite known as XMM (see left). This unique technology gives XMM the largest X-ray ...
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    Nature 387 (1997), S. 441-441 
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    Notes: [Auszug] [LONDON] Britain's Medical Research Council (MRC) is introducing the biggest shake-up of its funding and peer review arrangements for university research for three decades. According to MRC officials, the changes, whose details are being officially announced tomorrow (30 May), have been designed to ...
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    Nature 387 (1997), S. 441-441 
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    Notes: [Auszug] Centre grants Cooperative group grants Development giants Career establishment grants Innovation grants Supporting research on a single university site. Five-yearly review. Sunset clause. Infrastructure provision. Supporting collaborative research within or between universities in single ...
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    Nature 387 (1997), S. 439-440 
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    Notes: [Auszug] [WASHINGTON] Some of the research being carried out at nuclear weapons laboratories in Russia and the United States should be banned, as it could lead to dangerous new types of nuclear weapons, according to a number of US weapons scientists. Under the terms of the Comprehensive Test Ban Treaty, US ...
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    Nature 387 (1997), S. 442-442 
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    Notes: [Auszug] [MUNICH] In what appears to be Germany's first significant case of scientific fraud, two molecular biologists with rapidly growing reputations have been accused of fabricating data in papers published in leading journals. Marion Brach, 37, a full professor at the University of Lubeck near Hamburg, ...
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    Nature 387 (1997), S. 442-442 
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    Notes: [Auszug] One paper in which Brach admitted falsifying results is in The Journal of Experimental Medicine (181; 793; 1§95). This figure, taken from the paper, shows an autoradiogram intended to indicate the intracellular location of transcription factors induced by the cytokine TNF Yet it is composed of ...
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    Notes: [Auszug] [PARIS] France is embarking on a major reorganization of its research in telecommunications, currently carried out mainly by the Centre National d'Etudes des Telecommunications (CNET), part of the state-owned company France Telecom. The reforms include the creation of a national federation - the ...
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    Notes: [Auszug] [SAN DIEGO] A small biotechnology company is being sued for allegedly making use of data that it is said to have stolen from a chemistry laboratory at the University of California at San Diego (UCSD). Agouron Pharmaceuticals, Inc. of La Jolla is accused of taking data on the crystallization of an ...
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    Notes: [Auszug] [TOKYO] A report aiming to formulate guiding principles by which all publicly funded research in Japan - including that carried out in industry - should be evaluated was released last week by an advisory body attached to the prime minister's office. The report, by a subcommittee of the Council for ...
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    Nature 387 (1997), S. 446-446 
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    Notes: [Auszug] [MUNICH] The Human Frontier Science Programme, the Japanese-inspired project that funds intercontinental collaboration in basic biological research, will continue for at least a further five years. The programme's intergovernmental conference in Washington last week agreed that the project should ...
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    Notes: [Auszug] [PARIS] Britain's new Labour government has announced that it plans to meet its preelection promise to rejoin the United Nations Educational, Scientific and Cultural Organization (Unesco). Britain left the organization in 1984 along with the United States, complaining of mismanagement and ...
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    Notes: [Auszug] [WASHINGTON] Institutional Review Boards ' (IRBs) vary in willingness and ability to protect the privacy of human subjects In medical research, according to a report commissioned by Donna Shalala, the US Health and Human Services Secretary, which was released last week. The report, privacy and ...
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    Notes: [Auszug] [WASHINGTON] Private ethics boards set up to review experiments carried out mainly by pharmaceutical companies and medical products manufacturers came under vigorous attack at a congressional hearing early this month for allegedly corrupting the US system of human subjects protection. But they are ...
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    Nature 387 (1997), S. 448-448 
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    Notes: [Auszug] Sir- The lack of jobs that Alan Hale bemoans (Nature 386,530; 1997) should interest all of us. The problem, I suspect, is that there are too many postdocs, while academic institutions scramble for yet more postgraduates to sustain their research output cheaply. The supply of PhDs, therefore, is ...
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    Notes: [Auszug] Sir - Postgraduate students in the United Kingdom are shackled to a feudal system. The supervisor has total responsibility and control over research training. Regardless of contribution, the supervisor has the right to claim one's work for him or herself, as is manifest in any patents and ...
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    Notes: [Auszug] Sir - Assuming that the forthcoming test of the efficacy of prayer in the treatment of heart-surgery patients (Nature 386,639; 1997) will be done with proper double-blind protocols, there remains the question of whether the experimenters are willing to accept results that are not in line with their ...
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    Notes: [Auszug] Sir - There are some factual errors in the Briefing on fishery science (Nature 386, 106; 1997). It is said that PICES (the North Pacific Marine Science Organization) is one of two bodies that exist to provide governments with advice on fisheries science (the other being ICES, the International ...
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    Notes: [Auszug] Sir - The surprise that greeted the survey of religious belief in the scientific community (Nature 386,435; 1997) makes me wonder whether more scientists would believe in God if the predominant religious tradition of their upbringing had been not Judaeo-Christian but Islamic. While Western science ...
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    Notes: [Auszug] The human cornea has a special property known as immune privilege, which allows tissue grafts from donors to be carried out without the usual problems of immune rejection. However, immune privilege is lost at the perimeter of the cornea - the limbus of the eye - where the transparent corneal stroma ...
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    Notes: [Auszug] For unicellular organisms, the response to DNA damage is simple - the damage is contained fey arresting the replicative machinery, then DNA-repair programmes are activated to fix it Any mutations that are acquired in the process are merely the spice of unicellular genetic diversity. But metazoan ...
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    Notes: [Auszug] In the Earth sciences, Occam's razor is often dulled by the rock-hard reality of the complexity of geological processes. Models for Earth accretion are no exception. Did the Earth form homogeneously, with a continuous supply of material of essentially unchanging composition, and a single phase of ...
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    Notes: [Auszug] In the old days, radiation biology seemed a fairly straightforward affair - zap a cell and it stopped and died because it could no longer replicate its DNA. Nowadays, the world is both more curious and more complicated. The DNA damage inflicted by radiation (or by genotoxic drugs) is detected by a ...
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    Notes: [Auszug] The mitochondrion, the eukaryotic cell's respiratory power plant for ATP generation, arose more than a billion years ago when a free-living eubacterium took up residence to the mutual benefit of eukaryote and bacterium. Since then, mitochondria have become nature's molecular playground. Just about ...
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    Notes: [Auszug] The first shockwave of mitochondrial deviancy came in 1$79 with the discovery that qur own mitochondria doh?t use the 'universal' genetic code10. Many more codi deviations have since been found, especially within animals and fungi. Other unusual features of mitochondrial protein synthesis, ...
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    Notes: [Auszug] In France, the bohemian tradition goes back a long way. Palaeolithic cave artists of the Lot valley hi southwestern France not only experimented with surrealism, they may also have found inspiration in hallucinogenic drugs. So say Michel Lorblanchet and Ann Sieveking, in an analysis of engravings ...
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    Notes: [Auszug] In your issue of May 13 (p. 46), a writer mentions some Australasian boomerangs as thrown not to return (if I have rightly understood him). I had not heard of these before, but in British India at least one race, the Kolis of Northern Gujarat, have the like. These are invariably of "fish" section, ...
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    Notes: [Auszug] Last week, Daedalus invented a surfactant that stabilized small bubbles. The hydrophilk ends of its molecules were bulkier than their hydrophobic ends; packed into a monolayer on an aqueous surface, they curved that surface concave. He is now reversing the strategy. His new surfactants have ...
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    Notes: [Auszug] After spending several hours in a shopping centre, a 44-year-old woman returns to the car park but cannot remember where she parked her car-nerve cells in regions of her brain that subserve learning and memory are relentlessly withering, and then dying. This is because she has Alzheimer's disease ...
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    Notes: [Auszug] The relationship between lung cancer I and atmospheric pollution remains controversial1'3 despite 50 years of discussion, partly because studies are frequently restricted to small, well-monitored areas. In contrast to instrumental monitoring, bioindication techniques allow the mapping of pollution ...
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    Notes: [Auszug] Vervet monkeys (Cercopithecus aethiops) forage on patchily distributed resources, visiting several sites in a single trip. When choosing a route, they face a famous optimization problem, the 'travelling salesman' problem1. Here we pose a question about their route-choosing mechanism: how many ...
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    Nature 387 (1997), S. 465-466 
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    Notes: [Auszug] Rhodopsins act as the visual pigments of multicellular animals and also guide the swimming of green algae1 towards or away from light (phototaxis). If these rhodopsin molecules have a common evolutionary origin, fungi, the sister group of animals2, would also be expected to use a rhodopsin-based ...
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    Notes: [Auszug] The Yeast Genome Directory', published as a separate supplement to this issue of Nature*The Yeast Genome Directory will be sent automatically to full-rate subscribers. Personal subscribers who have not completed one of the reservation forms that have appeared in recent issues of Nature, and who ...
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    Nature 387 (1997), S. 466-466 
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    Notes: [Auszug] Turtles have generally been regarded as basal reptiles because they apparently retain the primitive anapsid skull pattern (no temporal fenestrae) unlike other extant reptiles which are diapsid (two temporal fenestrae on each side). However, the phylogenetic relationships between turtles and other ...
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    Notes: [Auszug] In commenting on our recent observation that there are more organic compounds with an even number of carbon atoms than with an odd number (Nature 384, 320; 1996), P. G. Stanley (Nature 385, 782; 1997) suggests that "The pronounced excess of C-even compounds among those with large numbers of carbon ...
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    Notes: [Auszug] James Chadwick (1891-1974) was taciturn and little given to those merry quips, outbreaks of rage or peccadilloes that can enliven a biography. The tale of so sterling a character, even when told as well as in this book, maybe a little short on light moments, but any reader interested in the ...
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    Notes: [Auszug] For the benefit of the unwary who might find themselves seduced by the intriguing title, it should be pointed out that Stuart Sherman's book is essentially a work of literary criticism. The purpose of this warning is twofold: to save horologers, eager for another box-office hit like Dava Sobel's ...
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    Nature 387 (1997), S. 468-469 
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    Notes: [Auszug] Most mathematicians find it very difficult to explain to other people what mathematics is and why we find it so absorbing. Even our students generally take some time to see the picture. They spend three or four years studying different parts of it in detail. While this is going on, we point out ...
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    Notes: [Auszug] Writing in a special issue of the London Times in August 1931 to celebrate the centenary of Michael Faraday's momentous discovery of electromagnetic induction, Lord Rutherford spoke for all scientists when he said: "The more we study the work of Faraday, with the perspective of time, the more we ...
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    Notes: [Auszug] A state of a quantum-mechanical system is completely described by a density matrix or a phase-space distribution such as the Wigner function. The complete family of squeezed states of light (states that have less uncertainty in one observable than does the vacuum state) have been generated using an ...
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    Notes: [Auszug] The optical counterpart to GRB970228 was observed with the HST Wide Field and Planetary Camera (WFPC2) on 26 March14 and 7 April151997, about 26 and 39 days after the outburst, respectively. The optical counterpart was placed at the centre of the Planetary Camera field of view, so as to attain ...
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    Notes: [Auszug] The average yield of wheat, Australia's major crop, has increased by -0.5 tonnes per hectare (O.Stha1; -45% of the average early 1950s yield of l.ltha"1) since 1952 (Fig. 1). One example of a climate variation that may influence wheat yield is frost frequency. The frequency of severe frosts ...
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    Notes: [Auszug] The 7-ray burst of 28 February 1997, detected8 with the Gamma-Ray Burst Monitor on board the BeppoSAX satellite, and located with an 3' radius position with the Wide Field Camera on the same satellite, was the first for which a fading X-ray1 and optical counterpart2'3 were discovered. The ...
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    Notes: [Auszug] An s + d pair state in orthorhombic copper oxides such as YBa2Cu3O7_5 (YBCO) is characterized by a gap function A(k) that transforms like s(tfx + fy + d(tfx - *£), where hx and ky are components of the wavevector k, and s and d are measures of the amounts of s-wave and d-wave pairing in the ...
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    Notes: [Auszug] Diamonds from Sao Luiz have been reported10 to contain inclusions of silicate minerals with the compositions of (Mg,Fe)SiO3 and CaSiO3, together with inclusions of the oxide (Mg,Fe)O. These compositions indicate an assemblage of the minerals (Mg,Fe)-perovskite, Ca-perovskite and ferropericlase, ...
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    Notes: [Auszug] We have analysed relationships of arthropods to other taxa by sequencing complete 18S rDNAs from representative taxa, aligning them with existing 18S sequences from other metazoan taxa, and analysing them by using standard phylogenetic techniques7. This study confirms the suspected relationships ...
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    Notes: [Auszug] The conditions necessary to induce LTD in freely moving awake animals have proved elusive6"8. As exposure to inescapable aversive stimuli has been reported to reduce high-frequency stimulation (HFS)-induced LTP in the hippocampus1'2, we wondered whether stress would also affect the ability to ...
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    Notes: [Auszug] Currently, the inferred set of 'proto-mitochondrial genes' comprises 44 protein-coding genes that specify 23 components of complexes I-V of the electron transport chain, 18 mitoribosomal proteins, and 3 proteins involved in cytochrome c\ biogenesis (Table 1). In addition, mtDNA encodes up to 3 ...
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    Notes: [Auszug] Transgenic mice were produced by using a construct containing an APP complementary DNA fragment encoding amino acids 591 to 695, which spans the amyloid-forming portion and the carboxy terminus of the human amyloid precursor protein, cloned into the first exon of the human neurofilament NF-L gene ...
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    Notes: [Auszug] In primary cultures of sensory neurons, nociceptors coexist with neurons that transduce other sensations. Although many in vitro techniques identify subpopulations of these neurons, no method identifies sensory modality10'11. The inability directly to compare neurons that mediate nociceptive and ...
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    Notes: [Auszug] ErbB2, ErbB3 and ErbB48"10 are members of a subfamily of receptor tyrosine kinases that also includes the EGF receptor (EGFR). Signalling through ErbB family receptors is important for regulating cell proliferation and differentiation in many tissues5"7, and deregulation of these signalling ...
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    Notes: [Auszug] The neuregulins (NRG-1) are a family of polypeptide growth factors that are thought to be critical for the developing heart and nervous system, and in the generation and progression of tumours. In the peripheral nervous system, neuronally derived NRG-1 acts at the neuromuscular junction to promote ...
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    Nature 387 (1997), S. 523-527 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In an attempt to study the dynamic aspects of nuclear organization, we sought to visualize pre-mRNA splicing factors in living cells. The green fluorescent protein (GFP)4 was fused in-frame to the amino terminus of the essential splicing factor SF2/ASF5'6. When expressed in several cell lines, the ...
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    Notes: [Auszug] Figure 1 Ionizing radiation does not activate c-Abl \nAtm-deficient cells, a, Wild-type (WT),Atm ',p53' andab/7 MEFs were collected 1 h after irradiation (10Gy). The c-Abl tyrosine kinase activity was measured using GST-CTD as a substrate. The incorporation of ...
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    Nature 387 (1997), S. 527-530 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Crystals of sCD4 were grown as described previously4 except we started from the selenomethionyl protein. Moreover, the extent of measurable diffraction was increased through cryoprotection. The structure of a tetragonal type-C crystal was determined by molecular replacement8, confirmed by selenium ...
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To determine whether c-Abl interacts with ATM, lysates prepared from control and AT lymphoblastoid cells, with or without prior exposure to 5 Gy of ionizing radiation, were subjected to immuno-precipitaiton with c-Abl antibody. Immunoblot analysis of the anti-c-Abl immunoprecipitate with an ...
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    Nature 387 (1997), S. 531-532 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Lumi-lmagerFrom Boehringer Mannheim Biochemicals The company's first chemiluminescent imaging instrument has been produced in collaboration with Photometries and Rodenstock This user-friendly system should provide accurate quantification and digital analysis in a variety of non-radioactive, ...
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    Nature 387 (1997), S. 321-321 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The human cloning debate has revealed the growing political importance of bioethics committees in the regulation of new technologies. Confronted with public concern about human cloning, the instant reflex of political leaders worldwide has been to call on the nearest bioethics committee for ...
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    Nature 387 (1997), S. 321-321 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A dispute at the Institute of Advanced Study at Princeton about a decision not to appoint a historian of science to a position in social sciences (see page 325) may reflect the grey area that can exist between objective assessment of research quality and vehement opposition to ideas. A central ...
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    Nature 387 (1997), S. 323-323 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] [WASHINGTON] In the most prominent speech of his presidency on research-related issues, President Bill Clinton called last Sunday (18 May) for Americans to remember that "science is not God" adding: "Our deepest truths remain outside the realm of science." In a speech that has been noticed ...
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    Nature 387 (1997), S. 323-323 
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    Notes: [Auszug] [WASHINGTON] Prompted largely by public concern about humans used In experiments, President Bill Clinton last week extended by two years the life of the national bioethics Commission, which is to report to him on cloning at the end of this month (see Nature 387, 217; 1997).' The need for this ...
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    Nature 387 (1997), S. 324-324 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] [PARIS] The recent flood of calls for an international ban on the use of human cloning techniques for reproduction appear, at least in some quarters, to be slowly giving way to recognition that such practices may be justified in certain circumstances. There is also a growing feeling ...
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    Nature 387 (1997), S. 324-324 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] [PARIS] Members of the International Bioethics Committee of the United Nations Educational, Scientific ahdCulturar Organization (Unesco) appear to be divided on the issue of human cloning, on which they are due to produce an interim statement this week, In particular, many are unhappy about ...
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