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  • Nature Publishing Group  (18,746)
  • 1985-1989  (18,746)
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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 337 (1989), S. 24-24 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIRá€"The recent letter of Lassila et al.1 clearly demonstrates that B cells cannot be the antigen-presenting cells that lead to priming of helper T cells. This contrasts with data from several laboratories2"4 demonstrating that B cells are required for the priming of CD4+, class ...
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  • 2
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    Nature 337 (1989), S. 23-24 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIRá€"Crisp and Fogg1 attack what they consider "mere changes of opinion" in establishing and changing names of taxa above the species level. To alleviate attendant inconveniences, at least among the barnacles, they offer a remedy of compromise between the classification of ...
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  • 3
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    Nature 337 (1989), S. 25-26 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EVOLUTIONARY theory continues to be characterized by sharp dissent and often acrimonious debate. The 'synthesis' á€" that relatively tranquil period that began roughly in 1930 and ended in the mid-1960s á€" in retrospect seems anomalous. Since its birth in the ...
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  • 4
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    [s.l.] : Nature Publishing Group
    Nature 337 (1989), S. 23-23 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MILLER AND BADA REPLY á€" Nisbet proposes that the origin of life took place in 40á°C vent waters rather than 350á°C vents. Russell et al.2 have also claimed that lukewarm vent waters were the site of important prebiotic reactions. The vent waters that are ...
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  • 5
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    Nature 337 (1989), S. 68-69 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Dystrophic and dystrophic-flushed peats are believed to be particularly susceptible to acid deposition. The surface layers of such peats rely directly upon ion-exchange properties and precipitation for the supply of cations and anions. Acid precipitation increases the leaching of cations from ...
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  • 6
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    Nature 338 (1989), S. 238-240 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tablet KTU 1.78 was discovered in 1948 among the remains of the Western Palace Archive in Ugarit5. The contents of this archive show that it was used over the entire span of the Late Bronze Age III period (around 1350-1175 BC). However, of all the different genres found in the various archives of ...
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  • 7
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The detection of the optical pulsar1 in the supernova 1987A represents the culmination of a search program begun in March 1987, consisting of 37 separate observations from three different observatories2. A detector was used that was designed to allow for a pulsar search in the ...
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  • 8
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    [s.l.] : Nature Publishing Group
    Nature 338 (1989), S. 240-241 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We explored several routes to the preparation of Nd2CuO4_xFx; the best results were obtained by heating stoichiometric mixtures of CuO, Nd2O3 and freshly prepared NdF3 in air at 900 á°C for 14 h followed by pelletizing and heating at 890 á°C for 14 h in flowing N2. A single ...
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  • 9
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    Nature 338 (1989), S. 241-243 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Ba1_xKxBiO3 thin films were epitaxially grown on SrTiO3 (110) substrates using an r.f.-magnetron sputtering method with substrate temperature of 400 á°C. The sputtering targets were prepared from a powder mixture of Bi2O3, BaO and KO2 by means of the two-step synthesis procedure7. ...
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  • 10
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    Nature 338 (1989), S. 247-249 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many impact-induced phenomena have been suggested to exert a climatic effect. Alvarez et all proposed that the shielding of the Sun by dust injected into the atmosphere following a land impact would exert such an influence on global climate; this was later explored by others8"10. There is now good ...
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  • 11
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    Nature 338 (1989), S. 244-246 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The equatorial belt (10á°S 10á°N) covers an area of 88 x 106 km2, with 77% being ocean. Along 14 sections of the busiest shipping routes (Fig. 1), about 2.4 million observations were selected from the trimmed COADS data7, covering an area of nearly 8xl06km2. We also intended ...
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  • 12
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We studied a colour-ringed breeding population of about 80 dunnocks in the Cambridge University Botanic Garden14"16. Some female territories were defended by one male (monogamy), others by two, unrelated males (polyandry). Some-times two males jointly defended the territories of two or three ...
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  • 13
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the reporter gene vit-tk-CAT (ref. 9), the 5'-flanking region of the Xenopus vitellogenin A2 gene (vit), which contains a consensus palindromic oestrogen-responsive element (ERE), is inserted upstream of the herpes simplex virus promoter for thymidine kinase (tk). In the mouse mammary tumour ...
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  • 14
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    Nature 338 (1989), S. 274-276 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The kanamycin resistance (Kmr) gene coding for neomycin phosphotransferase II (NPT II) is often used as a selectable marker to produce transgenic plants1. We found, however, that the bacterial hph gene is a more effective marker for the selection of stable transformants from embryogenic rice ...
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  • 15
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    Nature 338 (1989), S. 277-277 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DNA methylation and protein-DNA interactions play a crucial role in gene regulation12. Genomic sequencing á€" pioneered by Church and Gilbert3, and further refined in our laboratory4 á€" enables the study of the methylation state of any gene in a strand- and ...
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  • 16
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    Nature 338 (1989), S. 278-280 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] KONTRON Instruments sells an ultra-centrifuge toolkit that contains everything needed for the correct use of Kontron ultracentifugation rotors, tubes and cap-ping systems á€" packaged together in a black storage case (Reader Service No. 101). The toolkit includes a tube cap vise ...
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  • 17
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    Nature 338 (1989), S. 99-99 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE principle that any negotiations on arms control are better than none may be falsified by the talks begun this week in Vienna on the reduction of conventional forces in Europe. Ordinarily it would be a hopeful sign that the Warsaw Pact and the North Atlantic Treaty Organisation (NATO) are ...
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  • 18
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    Nature 338 (1989), S. 99-100 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE University of Tokyo may still be just a little ahead of the University of Kyoto in the affections of young Japanese seeking a university education, but, sadly, neither ranks with the great universities of the West as an international centre of scholarship. There are scholars with internatio-nal ...
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  • 19
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    Nature 338 (1989), S. 100-100 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Now that the British Prime Minister's zeal is harnessed to the preservation of the ozone layer, the rest of us will be able to sleep more soundly when we sunbathe. That is one of the lessons to be drawn from the conference in London at the weekend (see page 101), when Mrs Thatcher recrui-ted a ...
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  • 20
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    Nature 338 (1989), S. 100-100 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Readers persuaded by last week's reference to Wordsworth's "Endymion" that Nature^ name must have derived from Keats should know that the reference is to one of Wordsworth's "Miscellaneous sonnets", all of which are ...
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  • 21
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    Nature 338 (1989), S. 101-101 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] London The London conference on the ozone layer had preached successfully to the converted when it finished on Tuesday this week, but both China and India left muttering that they would seek amend-ments to the Montreal Protocol at the meeting planned for Helsinki in May. The conference, ...
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  • 22
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    Nature 338 (1989), S. 101-101 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Santa Clara, California REPRESENTATIVES of the US electronics industry, faced with the prospect of an enforced phase-out of the CFC solvents used as cleaning and drying agents in manufacturing, met CFC producers last week in Santa Clara to try to speed up the search for alternatives. ...
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  • 23
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    Nature 338 (1989), S. 102-102 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tokyo THE glitter and excitement of the financial markets is proving just as strong a lure to bright Japanese graduates as to their counterparts in the West. A survey*, released last week by the National Insti-tute of Science and Technology Policy (NISTEP) shows a sudden downturn in science ...
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  • 24
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    Nature 338 (1989), S. 102-102 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] London BRITISH veterinarians were congratulating themselves last week that a disease of cattle first recognized in 1986 could have dis-appeared again by 1993. That is the pre-diction of a working party under Sir Richard Southwood set up last year to study Bovine Spongiform Encephalopathy ...
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  • 25
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    Nature 338 (1989), S. 102-102 
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    Notes: [Auszug] New Delhi FRANCE has proposed moving one of its optical telescopes to India as the first step in a collaborative research programme in astronomy. The proposal was made by Professor Jean Audoze of the Institut d'Astrophysique de Paris at a recent conference in New Delhi of Indian and French ...
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  • 26
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    Nature 338 (1989), S. 103-103 
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    Notes: [Auszug] Washington & Tokyo JAPAN'S hunger for tropical timber, of which it is the world's largest consumer, has drawn its attention to the Amazon rain forests and onto a collision course with international organizations concerned about the shrinkage of the tropical forests. Japanese imports of ...
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  • 27
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    Nature 338 (1989), S. 103-103 
    ISSN: 1476-4687
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Washington WILD chimpanzees, previously classified as 'threatened', have now been reclassi-fied as an 'endangered' species by the US Fish and Wildlife Service. As a result, it will now ordinarily be illegal to import into the United States chimpanzees or their young which have been caught in ...
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  • 28
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    Nature 338 (1989), S. 104-104 
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    Notes: [Auszug] London THE Clinical Research Centre (CRC) of the Medical Research Council (MRC) has been chosen as the hub of Britain's part in mapping and sequencing the human genome. CRC will house a resource centre responsible for assembling and dis-tributing databases and DNA libraries as well as for ...
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  • 29
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    Nature 338 (1989), S. 104-104 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Munich THE European Community's embattled (and now renamed) Human Genome Analysis proposal has been much changed by a debate last month in the European Parliament. The proposal calls for an in vestment of ECU 15 million (about £10 million) over three years for mapping and sequencing the ...
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  • 30
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    Nature 338 (1989), S. 104-104 
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    Notes: [Auszug] Washington DAVID J. Lipman has been appointed director of the new Biotechnology Informa-tion Center set up within the National Library of Medicine, part of the US National Institutes of Health (NIH). The management of NIH is known to be dis-mayed that the centre has been established separately ...
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  • 31
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    Nature 338 (1989), S. 104-104 
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    Notes: [Auszug] Washington FORMER US Senator Lowell Weicker will head a newly formed alliance of health-related organizations designed to drum up public support for biomedical research. The alliance, dubbed Research! America, will not lobby Congress for support, but will instead conduct a campaign to per-suade ...
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  • 32
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    Nature 338 (1989), S. 107-107 
    ISSN: 1476-4687
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] New Delhi SCIENCE does modestly well in the Indian government's election-year budget pres-ented to parliament last week. Seven scientific departments between them will have $1,460 million to spend in the financ-ial year beginning on 1 April. That amounts to 2.7 per cent of the total Indian ...
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  • 33
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    Nature 338 (1989), S. 108-108 
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    Notes: [Auszug] Munich AN unprecedented blend of computer crime and espionage came to light last week when West German police arrested eight men on charges of providing pass-words and other data from Western milit-ary computer systems to Soviet-bloc intel-ligence agents. The 'hackers', all between 25 and ...
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    Nature 338 (1989), S. 108-108 
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    Notes: [Auszug] Sydney AUSTRALIAN science has suddenly become popular in political circles. The govern-ment is providing an immediate infusion of funds for research, and has vowed to develop a major policy statement on sci-ence and technology. The newly favourable wind appears to stem from the response ...
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    Nature 338 (1989), S. 110-110 
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    Notes: [Auszug] SIR-Your conclusion (Nature 337, 393; 1989) that the shortfall in donor kidneys might be made good by better internat-ional cooperation calls for serious consid-eration. In this sphere as in many others, two European maps have been drawn, with two separate international organiza-tions, ...
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    Nature 338 (1989), S. 112-113 
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    Notes: [Auszug] SOME alleles in the mammalian genome can function differently depending on whether they come from the mother or the father. Functional differences between homologous alleles are caused by genomic imprinting, an epigenetic marking process which has important consequences for embryonic development '. ...
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    Nature 338 (1989), S. 113-113 
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    Notes: [Auszug] G. M. B. DOBSON, who pioneered atmos-pheric ozone measurements, was born on 25 February 1889. The photograph was taken while Dobson was a member of the Meteorological Office Research Committee in 1955. His interest in ozone was aroused by his studies of meteor trails in the atmosphere, which led to ...
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    Nature 338 (1989), S. 114-115 
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    Notes: [Auszug] EARTHQUAKES and topographic uplift of the Earth's surface are generally recog-nized to be the direct results of slow con-vective flow in its hot interior. The solid rock of the Earth's mantle flows by a combination of dislocation and diffusion mechanisms. Rocks from the upper, mantle are ...
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    Nature 338 (1989), S. 118-118 
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    Notes: [Auszug] Mr. Ernst draws attention to the formation of these ledges as observed by himself in Caracas. They are probably to be found in many places, if carefully looked for. The diagram, taken from a photograph, illustrates one of the most striking instances I know, to be found near Ballantrae, on the ...
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    Nature 338 (1989), S. 119-120 
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    Notes: [Auszug] MOUNTING evidence suggests that galaxy formation did not end with the rapid col-lapse of protogalactic gas clouds shortly after the Big Bang. Instead, it is becoming increasingly clear that gravitational inter-actions, collisions and even mergers con-tinue to reshape and feed galaxies right to the ...
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    Nature 338 (1989), S. 120-120 
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    Notes: [Auszug] LAST week Daedalus invented Wet Paint®, a cunning self-cleaning paint. It is mainly a hygroscopic polymer resin, which absorbs water vapour from the night air while the temperature is low and the humidity is high. But in the morning, when the paint warms up again, dispersed waxy globules in the ...
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    Nature 338 (1989), S. 122-122 
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    Notes: [Auszug] SIR-We fully share the concern (Nature 336, 513; 1988) that the US National Science Foundation may turn down the proposal for a new gravity-wave detector based on laser interferometer and we are equally concerned about the financing of the equivalent European projects. We are convinced, however, ...
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    Nature 338 (1989), S. 122-122 
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    Notes: [Auszug] SIR-Robert Parker (Nature 336, 719; 1988) purports to demonstrate that a Boeing 747 crash could put 250,000 people at risk from the combustion of the depleted uranium counterweight in the tail. His figures show that on the worst-case assumptions, 8.5 kg of uranium would reach the atmosphere in ...
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    Nature 338 (1989), S. 146-148 
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    Notes: [Auszug] Atlantic salmon fry (Salmo salary 1 g mass, post-first feeding) were maintained in tanks (120 fish per tank) with a through-flow of water at about pH 5 and containing various concentrations of aluminium and silicic acid. The concentration of aluminium in natural waters is in the range 〈1 to 〉25 ...
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    Nature 338 (1989), S. 161-164 
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    Notes: [Auszug] Experiments were performed on 38 Swiss mice from mothers that had been injected with tritiated thymidine (5 jxCi g"1 of body weight) on days 9, 10, 11, 12, 13, 14, 16, 18, 19 or 20 of gestation. One hour later, these animals were anaesthetized with Metofane, killed by rapid decapitation, ...
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    Notes: [Auszug] In these experiments we used single smooth-muscle cells from the stomach muscularis of the toad Bufo marinus7. These cells have been well characterized8'10, which has helped us to assess the effect of modulators on the contraction process. We micro-injected the modulators under pressure into single ...
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    Nature 338 (1989), S. 170-172 
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    Notes: [Auszug] The precursor protein was a fusion protein containing a mitochondrial presequence (derived from the yeast cytochrome oxidase subunit IV precursor) linked to a modified5 mouse dihydrofolate reductase (DHFR) protein. This modified variant (DV12) can be purified after overexpression in Escherichia ...
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    Nature 338 (1989), S. 175-175 
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    Notes: [Auszug] IT is surely not just folklore that genera-tions of physics students have found statis-tical mechanics to be one of the hardest parts of their subject to grasp at first meet-ing. Some of the difficulties originated from the custom of following the historical sequence by teaching classical ...
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    Nature 338 (1989), S. 180-180 
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    Notes: [Auszug] FEW things in the organic chemist's world have changed more dramatically in the past decade than has the arsenal of spectroscopic methods available. Nuclear magnetic resonance techniques, which less than eight years ago were known only to physical and analytical chemists, are now accessible to ...
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    Nature 338 (1989), S. 179-179 
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    Notes: [Auszug] BECAUSE of its proximity, the Sun inun-dates us with data and with theoretical problems. Few possess the diverse know-ledge of physics required to understand and lucidly explain these problems; in consequence, most recent books on general solar physics have been collections of chapters by ...
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    Nature 338 (1989), S. 186-186 
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    Notes: [Auszug] Volume 1. October 1988 £37,50 256pp 234xl56mm 0333452852 Apolipoprotein quantitation by ELISA: Technical aspects and clinical applications - J. B. Bury & M. Y. Rosseneu Recent progress in the quantitation of phagocytosis - T. W. Jungi Monoclonal antibodies directed against ...
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    Notes: [Auszug] Advanced Inorganic Chemistry, 5th edn by F. A. Cotton & G. Wilkinson 182 Applied Sedimentology byR.C.Selley 178 Astrophysical Concepts, 2nd edn byM.Harwit 179 Astrophysics of the Sun byH.Zirin 179 The Atmosphere of the Sun by C. J. Durrant 179 Basic Principles of ...
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    Nature 338 (1989), S. 1-1 
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    Notes: [Auszug] THE new president of the United States may be saying all the right things (see Nature 337, 585; 1989), but he is doing fewer of them than he should. This complaint has been levelled generally at the new administration, which has yet to fill its roster of cabinet appointments, let alone all the ...
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    Notes: [Auszug] THE emergence in Britain of a shortage of young researchers (see page 7) is about as remarkable as the diurnal rhythm. For close on ten years, British research establishments have been harassed by lack of funds, so that newspapers have been full of tales of researchers who have been put out to ...
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    Notes: [Auszug] MR Salman Rushdie's book Satanic Verses opens with the fantasy of how two unremarkable people survive the destruction (by a bomb) of an aircraft over the English Channel and then found a new religion. The ways of the Shiite Muslims who have now offered a money prize for Rushdie's assassination and ...
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    Notes: [Auszug] REGULAR readers who happen to notice the typographical changes in this week's format will passionately resent the small changes which have been made. That at least is what past experience shows. The only comfort is that, with the passage of a few weeks, the same readers will become just as vigilant ...
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    Nature 338 (1989), S. 3-3 
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    Notes: [Auszug] Boston NEW YORK'S never-licensed Shoreham Nuclear Power Station may be rising from its grave, if its parent utility's stock is any indication. The stock of the Long Island Lighting Company (LILCO) has recently been the third most actively traded of the stocks, on the New York Stock Exchange. ...
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    Nature 338 (1989), S. 4-4 
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    Notes: [Auszug] THE divisive issue of the use of animals in research was the centre of attention last week at two San Francisco area universities. Stanford University has been debating a genteel change of policy that would affect the use of animals in teaching, while, on the University of California campus at ...
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    Nature 338 (1989), S. 7-7 
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    Notes: [Auszug] London THE British Medical Research Council (MRC) wants to increase the pay of graduate students in the hope of stemming the growing shortage of young researchers. Last week, the council asked the Department of Education and Science (DES) to allow an increase from just under £3,000 to ...
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    Notes: [Auszug] London THREE members of the Hungarian National Assembly are in danger of losing their jobs because of their electors' objections to the controversial Gaboikov-Nagymaros hydroelectric scheme. After a majority of the assembly voted for completion of the Hungarian part of the scheme, three ...
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    Notes: [Auszug] Paris .THERE is now hope that the European Remote Sensing Satellite, ERS-1, to be launched next year, will have an enthusiastic band of users. That seems to be the outcome of last month's meeting between the director-general of the European Space Agency (ESA), Reimar Lust, and the President of ...
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    Notes: [Auszug] Tokyo THE first satellite designed specifically for study of the particle acceleration mechanisms producing the aurora borealis (and australis) was launched successfully last week (22 February) by Japan's Institute of Space and Astronautical Science (ISAS) from the Kagoshima Space Center. ...
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    Notes: [Auszug] Tokyo A TOUGH election battle for the presidency of the University of Tokyo resulted in victory last week for Professor Akito Arima, one of the chief proponents of major change for Japan's leading university. The election was so close that the university was eventually compelled to choose ...
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    Notes: [Auszug] Moscow COMPUTERS in the Soviet Union have been suffering from virus infections just as in the United States and Western Europe. In one of the most recent cases, at the Institute of Applied Mathematics of the Soviet Academy of Sciences, researchers found that some of their programs were ...
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    Notes: [Auszug] Mr Gorbachev and his wife Raisa pictured talking to workers during a visit to the Chernobyl nuclear plant last week to inspect the site of the world's worst nuclear disaster three years ago. Mr Gorbachev promised that nuclear power, while essential, was unthinkable without guarantees of complete ...
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    Notes: [Auszug] Paris THE director of the research mission of the French department for Austral and Antarctic Territories (TAAF) has rejected claims by the environmental group Green-peace that an airstrip being constructed in the French Antarctic Territory contravenes the Antarctic Treaty (see Nature 337, ...
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    Notes: [Auszug] SIR-The maxim quoted again by G. B. Field, M. J. Rees and D. N. Spergel in their otherwise excellent article (Nature 336, 725-726; 1988) that human space-flights "cannot be expected to yield a return commensurate with their cost if the judgement is made in purely scientific terms" is ...
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    Nature 337 (1989), S. 597-598 
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    Notes: [Auszug] JUST as feedback can be used to correct errors in the output voltages of amplifiers, it can also be used to remove noise from the current through a resistor á€" including the 'Johnson/Nyquist' noise that results from the thermal motion of electrons1. Such a fed-back amplifier ...
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    Nature 337 (1989), S. 601-601 
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    Notes: [Auszug] MUCH interest was aroused a few years ago by the first report1 of continuous recording of the intracellular pH (pH;) response to growth factors in cultured fibroblasts. That the fibroblasts came from human foreskins (sic) caused some twinges, but the main interest was the possiblity that growth ...
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    Notes: [Auszug] SIR-Stereo-pairs, usually of molecules, are regularly printed in many journals and add a useful third dimension to the traditionally two-dimensional printed page. I wonder, however, how many readers actually see stereo-pairs in three dimensions with correct orientation. An informal poll of my ...
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    Notes: [Auszug] SIR-We have recently reported1 the localization of a protein of relative molecular mass 210,000 (210K) sharing an anti-genie determinant with the 400K dystro-phin on the surface membrane of normal human skeletal muscle fibres. Hoffman et al.2 have since suggested that the 210K protein may be a ...
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    Nature 337 (1989), S. 610-610 
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    Notes: [Auszug] NOT too long ago there was only one book on fractals, Benoit Mandelbrot's The Fractal Geometry of Nature. Now there are several, but here we have the first genuine textbook on fractals as fractals (the admirable Geometry of Fractal Sets, by Ken Falconer, is too much a textbook on geometric measure ...
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    Nature 337 (1989), S. 669-670 
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    Notes: [Auszug] Two-dimensional gel electrophoresis is a powerful biochemical resolving technique that allows life science researchers to investigate changes in cellular protein expression quantitatively. Using the appropriate protein identification procedures and experimental designs, the technique can be ...
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    Nature 337 (1989), S. 499-502 
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    Notes: [Auszug] JUST over 13 years from now, there will be great celebrations on the fiftieth anniversary of what will then be recognized — as it is, of course, already — to have been one of the great discoveries in the history of science, that of a plausible structure ...
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    Nature 337 (1989), S. 513-513 
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    Notes: [Auszug] SIR The existence of young stars at vast distances from the plane of our Galaxy, as discussed in a recent News and Views article1, seems to be reasonably well understood for some of the varieties of star under investigation. In the case of the young, high-velocity A stars observed in the galactic ...
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    Nature 337 (1989), S. 517-517 
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    Notes: [Auszug] OUR eyes are mobile and our perception of the visual world is built up as a series of snapshots, each taken with the eyes pointing in a slightly different direction. Eye movement is a pre-condition of seeing, and the relation between ocular displacement and visual perception presents problems which ...
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    Nature 337 (1989), S. 533-535 
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    Notes: [Auszug] The observations described here were obtained with the UCL array spectrometer on the Anglo-Australian telescope on days 465, 517 and 578 after the explosion of SN1987A on 23 February 1987; Fig. la shows the 8-13 jxm spectra obtained on days 465 and 578. These were obtained through a ...
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    Nature 337 (1989), S. 539-541 
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    Notes: [Auszug] The proton magic-angle-spinning (MAS) NMR spectrum for sample SIC, an SiO2 glass containing 2.5 wt% water quenched from 1,320°C and 1 kbar (Fig. \b) consists of an asymmetric peak, broadened towards high frequency. Although this could be explained in terms of a distribution of proton ...
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    Nature 337 (1989), S. 549-553 
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    Notes: [Auszug] If an observer moves in a three-dimensional world, a flow of apparent motion (optical flow) occurs on his retina which is useful for performing several different tasks such as image segmentation, determination of structure from motion, and navigation. We have developed a new parallel algorithm to ...
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    Nature 337 (1989), S. 553-555 
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    Notes: [Auszug] To compare the growth rate of different neurons at the same stage of their development, I used the vestibular, geniculate, petrosal and nodose ganglia whose neurons are born over the same period of development (between two and five days in ovo5). These ganglia also have similar ontogeny, in that ...
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    Nature 337 (1989), S. 562-566 
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    Notes: [Auszug] We cloned genes for the transgenic (Tg) anti-H-2KkDk antibody from the DMA of the BALB/c IgG-producing hybridoma 3-83 (ref. 13), and constructed a chimaeric heavy-chain gene using a mouse CJJL constant-region DNA clone (see Fig. la). The founder male Tg mouse was derived from an embryo that was ...
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    Notes: [Auszug] Trigonal crystals containing two molecules of the protease in the asymmetric unit23 were grown under conditions in which the protease remains active12. The crystallographic model of the RSV protease (PR) was obtained as described in the Fig. 1 legend and is shown in Fig. 2. Only one molecule was ...
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    Nature 337 (1989), S. 393-393 
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    Notes: [Auszug] IN the design of mammals, there is a useful measure of redun-dancy: some organs, the kidney conspicuously, appear in pairs, the redundancy being a safeguard against the stresses of long life: if one of a person's kidneys should fail, the other may be sufficient. Kidney transplants are a further ...
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    Notes: [Auszug] THE Department of Pharmacology at the Free University of Amsterdam follows the practice of commissioning a solsticial greetings card from its two newest members. This year's card is reproduced ...
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    Nature 337 (1989), S. 397-397 
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    Notes: [Auszug] London THE withdrawal of the only candidate for one of Europe's top scientific posts has created a considerable problem for the governing body of the European Molecular Biology Laboratory (EMBL) in Heidel-berg. The most likely outcome of a meeting of EMBL's council on 6 February is that the ...
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    Notes: [Auszug] Washington RICHARD Nicholson, at present assistant director for mathematical and physical sciences at the National Science Founda-tion, was last week named as the new executive officer of the American Associa-tion for the Advancement of Science. He replaces Alvin Trivelpiece who left the ...
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    Notes: [Auszug] San Francisco TIME is running out to resolve the political and legal challenges to the way the 1990 US census will be conducted. Yet practical issues such as how to count the minority population of large urban areas and whether to count illegal aliens will have a profound effect on the social ...
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    Notes: [Auszug] SIR-The picture drawn by John Maddox (Nature 336, 333; 1988) of Swiss academic life is in my opinion a bit too rosy. I agree that there are a few positive aspects: faculty salaries, particularly those of senior pro-fessors, are high; retirement benefits are generous; SNFS research grants are easily ...
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    Nature 337 (1989), S. 405-405 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] THE possibility that small drops of 'quark matter' might be stable was first put forward by Witten1. More detailed cal-culations by Farhi and Jaffe2 showed that the hypothesis was certainly plausible; also these authors named stable quark matter 'strange matter' because of the important role played ...
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    Nature 337 (1989), S. 409-409 
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    Notes: [Auszug] IN 1988, about 6,000 unsolicited manu-scripts were submitted to Nature for publi-cation as Letters or Articles - almost exactly the same number as in 1987. About 35 per cent were sent to our Washington office rather than to London - there is no preference. About 30 per cent dealt with physical ...
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    Nature 337 (1989), S. 412-412 
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    Notes: [Auszug] BRITTLE fracture is the ultimate engineer-ing catastrophe. Microscopic cracks lurk in all solid surfaces; they gape slightly under load, and may even extend a little. Sooner or later the component may meet a stress great enough for a crack to run away, like a cloth tearing in two from a nick in one ...
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    Nature 337 (1989), S. 414-414 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] SIR-Gaffney and Cunningham1 and Hill2 have addressed a biological dilemma with important consequences by illustrating that although TIMEFORM ratings for thoroughbred horses are increasing by about 1 per cent per year, the winning times for the English classic races have not changed appreciably ...
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    Nature 337 (1989), S. 416-416 
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    Notes: [Auszug] SIR-Jane way, in his recent News and Views article1, stated that intestinal epithelial lymphocytes "in both chickens and man are predominantly CD8+ T cells with y/d receptors". In our immuno-histochemical studies of human intra-epithelial lymphocytes, we also find that most intraepithelial ...
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    Nature 337 (1989), S. 417-417 
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    Notes: [Auszug] Face of the past - a Colossal Head, in total 2.84m high, fashioned from basalt and typical of the Olmec culture of Mexico (c. 1200-900 BC). The picture is reproduced from the new paperback of Michael D. Coe's Mexico, 3rdedn, to be published by Thames & Hudson on 13 February, ...
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    Nature 337 (1989), S. 420-420 
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    Notes: [Auszug] QUATERNARY geology (or, in a less parti-san sense, Quaternary science) has long been the Cinderella of the earth sciences, attracting little attention as a discipline except from small national bands of enthusiasts. It is against this background that John Catt has produced a compact book of seven ...
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    Nature 337 (1989), S. 309-310 
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    Notes: [Auszug] ONE of the problems of studying terrestrial fossil sites is that large plants and animals seem to be commoner than small ones, whereas the opposite pertains in nature. This could be because organisms were on average larger in the past; or because small ones are less likely to be preserved. The ...
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    Nature 337 (1989), S. 311-312 
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    Notes: [Auszug] SIR—Because the cell line TE671 is said to originate from an early culture of a human medulloblastoma1, it has been widely used to investigate this tumour type and as a model for primitive neural cells in general. And because the cell line can be infected by the AIDS virus HIV2 (in a way ...
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    Nature 337 (1989), S. 314-314 
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    Notes: [Auszug] AT THE end of a eukaryotic mitosis, most of the chromatin in the cell decondenses. Some does not and remains genetically inactive — this material, with its distinctive cytological properties, is called hetero-chromatin. Until recently there has been a gap between the ...
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    Nature 337 (1989), S. 316-316 
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    Notes: [Auszug] SINCE I began teaching virology in 1981,1 have come across only one book that purported to be a history of the subject — and that is now sadly out of date. It was pleasing, therefore, to hear that Karger were to bring out the volume under review. My enthusiasm dwindled some-what when I ...
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    Nature 337 (1989), S. 331-337 
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    Notes: [Auszug] The telomerase enzyme of Tetrahymena synthesizes repeats of the telomeric DNA sequence TTGGGG de novo in the absence of added template. The essential RNA component of this ribonucleoprotein enzyme has now been cloned and found to contain the sequence CAACCCCAA, which seems to be the template for ...
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