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  • Nature Publishing Group  (19,444)
  • 1970-1974  (19,444)
  • 1
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    [s.l.] : Nature Publishing Group
    Nature 248 (1974), S. 763-789 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 Survival curves of 51Cr and 125I-labelled rat erythrocytes in vivo. Labelled cells (1 ml) were injected through the tail vein. At various times, blood samples were taken by tail cut and 0.05 ml of blood was collected into a heparinised capillary tube and mixed with 1.0 ml of normal saline. ...
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  • 2
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    Nature 250 (1974), S. 57-59 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Here we report an interferon-induced increase in the sensitivity of virus protein synthesis to inhibition by dsRNA in cell-free systems from mterferon4reated L cells. Previously, we showed a similar enhanced inhibition of protein synthesis in such systems in response to infection with vaccinia or ...
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  • 3
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    Nature 250 (1974), S. 60-61 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In 1960, Dr William Davenport confirmed earlier observations concerning an excess of males on the island of Santa Cruz in the British Solomon Islands Protectorate. He suggested that this alteration in sex ratio might be the result of selection by an infectious disease (personal communication). ...
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  • 4
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    Nature 250 (1974), S. 61-62 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Male Holtzman rats (200?300 g) were fasted overnight and then given aspirin by stomach tube (150?300 mg kg?1 body weight, homogenised in 1 % methyl cellulose). Control rats were given an equal volume of 1 % methyl cellulose alone. After an appropriate time (5 min to 5 h) the rats were killed and ...
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  • 5
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    Nature 250 (1974), S. 62-64 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In an attempt to reconcile those contradictory data, we have thoroughly investigated the relationship between cell density and the cyclic AMP levels of mouse 3T3 cells. We have also studied deoxyglucose transport and cellular ATP levels as possible density-dependent phenomena. Measurements were ...
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  • 6
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has previously been noted2 that cultivation of mouse prostate in chemically defined medium without vitamin A resulted in squamous metaplasia of the prostatic secretory epithelium and that inclusion of vitamin A in the defined medium completely prevented this metaplasia. The addition of the ...
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  • 7
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    [s.l.] : Nature Publishing Group
    Nature 250 (1974), S. 66-67 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This understanding of the vertebrate visual cycle is based upon experiments in which high light intensities were used, and most or all of the rhodospin was bleached. It is not known whether release, reduction and esterification of the chromophore occur after a smaller fraction of rhodopsin is ...
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  • 8
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    Nature 250 (1974), S. 67-68 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Cholesterol and phos] pholipid content of normal lymphoc ytes and lymphocytic leukaemia celh i Total lipid Cholesterol Phospholipids Cholesterol: Cell type (g x 10-12 (mol x 10-15 (g x lO'6 (mol x 10-15 (g x JO'6 lipid -P per cell) per cell) per mg lipid) per cell) ...
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  • 9
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We wish to report discrete changes of conductance after the incorporation of an ACh receptor preparation into artificial lipids bilayers. These events were related to a unit conductance that is probably associated with some fundamental function of the receptor. Receptors were extracted by ...
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  • 10
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    Nature 250 (1974), S. 70-71 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To assess the relevance of these effects to the opiate syndrome8, we performed experiments with naloxone, a narcotic antagonist essentially devoid of agonist activity9. As a further test of specificity of effects observed with morphine, three morphinans were also studied: levorphanol, an active ...
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    Nature 250 (1974), S. 71-73 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The putative monoamine neurotransmitters, noradrenaline, dopamine and serotonin have been implicated in such functions, and indeed lithium influences their metabolism in the brain3,4. The precise distribution of monoamine-containing cell bodies, fibres and synaptic terminals has been well ...
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  • 12
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    Nature 250 (1974), S. 73-75 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Suppress!' on of T4 amber r in bui nutants by tfa -st size j suA a lie le, expressed CR63* suA* A7/~t E. coli Bt Catalytic functions amNGW (30) 46 77 0.01 0.003 flm£1017(30) 70 131 0.03 0.008 amNG352 (42) 21 20 0.06 0.04 amE93 (42) 32 ...
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    Nature 250 (1974), S. 75-76 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In 18 sheep of mixed breeds 120?145 d pregnant with catheters previously implanted in the foetal trachea and carotid artery, carotid blood samples were taken from mother and foetus and ACTH and corticosteroid concentrations were measured as previously described3,6. Sampling took place at least 1 ...
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  • 14
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    Nature 250 (1974), S. 76-77 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] But, Phillips1 and Railton and Phillips2 have shown that the ratio of gibberellin activity in diffusates from opposite halves of geotropically reacting green Helianthus hypocotyls and etiolated Zea coleoptiles reaches values of about 9:1 and 4:1, respectively, in favour of the lower (convex) half. ...
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  • 15
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    Nature 250 (1974), S. 77-79 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This report describes a preliminary experiment to simulate this efficient escape and assess its effectiveness on a predator's selection of prey. Bathilda ruficauda, the star finch, was used as the predator and the prey was white millet seed dyed red, blue or green with food colouring (1% acetic ...
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  • 16
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    Nature 250 (1974), S. 79-80 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Werner (refs 1 and 2, and personal communication) showed that the ears of six species of iguanid lizards were most sensitive in terms of the electrical potentials of the cochlea at temperatures corresponding either to the 'eccritic' or to the similar 'preferred' temperature. At this optimum ...
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  • 17
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    Nature 250 (1974), S. 80-82 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Testicular response of three adult pinon jays provided freely with green cones of the pinon pine. Testes were regressing* in ten experimental birds and ten controls through June and July. On August 1 the dried pinon seeds provided to the experimental jays were replaced with green ...
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  • 18
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    Nature 250 (1974), S. 82-83 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Nichols' hypothetical ancestral echinoderm, in cross section. Nichols' reconstruction, like many primitive echinoderms, has mouth, hydropore and anus in a straight line. Such an animal must live with the anus on the downstream side, to carry waste products away from mouth and hydro-pore ...
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  • 19
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    Nature 250 (1974), S. 83-83 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Here I report an experiment undertaken with a view to isolating the factors which may be involved in the infertility of the sheep and goat cross, the approach being to circumvent any incompatibility between spermatozoa and environment by transferring sheep oocytes to the Fallopian tubes of goats ...
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  • 20
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    Nature 250 (1974), S. 84-84 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Following recent work in Australia by Johnston and Hutchins2, a request was made to these authors for isolates of the fungus from the New South Wales cases, but none had survived more than a few months in culture. This fate has also occurred to the isolates of Bridges and Emmons (H. Hasenclever, ...
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    Nature 250 (1974), S. 84-84 
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    Notes: [Auszug] IN the letter "Appearance of unusual mitochondria in rice coleoptiles at conditions of secondary anoxia" by B. B. Vartapetian, I. N. Andreeva and A. L. Kursanov (Nature, 248, 258; 1974) the wrong illustration was published as Fig. Id. The bottom half of Fig. 1 should be: Fig. 1 Ultrastructure of ...
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  • 22
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    Nature 250 (1974), S. 85-86 
    ISSN: 1476-4687
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE publication of E. P. Odum's Fundamentals of Ecology (Saunders, Philadelphia, 1959) heralded a new era in the teaching of ecology at university undergraduate level. In particular it was Odum's emphasis upon the ecosystem as the basic unit of ecology which permitted the novel but long-awaited ...
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    Nature 250 (1974), S. 86-87 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS is an excellent book about insect population dynamics, with emphases on the construction and evaluation of life tables, on quantitative description of the effects of parasitoids, predators and competitors, and on application of these techniques in the field of biological control. It will be ...
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    Nature 250 (1974), S. 87-88 
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    Notes: [Auszug] "I WAS just obeying orders". From My Lai to Auschwitz and doubtless back to the time of Genghis Khan and before, the perpetrators of atrocities have excused their actions with some variation on that theme. Many people dismiss that excuse; they feel that the people involved in such horrors must be ...
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    Nature 250 (1974), S. 87-87 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT hasn't always been 'all change' at the British Museum, but as readers of Edward Miller's scholarly and readable history (That Noble Cabinet, Deutsch, London, February 1974; £4.80) of the museum will soon discover, this famous institution has not been blessed with a particularly peaceful ...
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    Nature 250 (1974), S. 88-88 
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    Notes: [Auszug] ALTHOUGH the surgery of cataracts figures prominently in many ophthalmic practices, clinical research has been mainly concerned with the technological problems of avoiding the post-operative complications. The relative success of modern cataract surgery may have inhibited to some extent the need ...
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    Nature 250 (1974), S. 88-88 
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    Notes: [Auszug] THE discovery in 1965 that under certain conditions fast ions from nuclear particle accelerators could penetrate to anomalously great depths in single crystals came as something of a surprise to physicists. It was not that any new principle was involved but simply that the passage of fast ions ...
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    Nature 250 (1974), S. 89-90 
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    Notes: [Auszug] In the recently announced Honours List, Sir John Wolfenden, formerly chairman University Grants Committee and Director British Museum was made a Life Peer; W. F. Anderson, David Cargill Professor of Geriatric Medicine, University of Glasgow; S. G. Clayton, President, Royal College of Obstetricians ...
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    Nature 250 (1974), S. 89-89 
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    Notes: [Auszug] In the article "Formation of methyl-mercury in a terrestrial environment" by W. F. Beckert et al. (Nature, 249, 674; 1974) the units given in paragraph 3, lines 4 and 5 should be ... 1 mCi 203Hg m?2 and 2?20 Ci g?1 ...
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    Nature 250 (1974), S. 89-89 
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    Notes: [Auszug] In the article, "Palatability dynamics of cardenolides in the monarch butterfly" by L. P. Brower (Nature, 249, 280; 1974) Table 2 contained several errors and the following corrections should be made: California butterflies, line one, number of birds should read 9{; line eight, absorbance range of ...
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    Nature 250 (1974), S. 90-90 
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    Notes: [Auszug] Great Britain Philosophical Transactions of the Royal Society of London. A: Mathematical and Physical Sciences. Vol. 276, No. 1259: On the Chapman-Kolmogorov Equation. By J. F. C. Kingman. Pp. 341?369. (London: The Royal Society, 1974.) [95 Fossils in Caves. (Palaeontology Leaflet No. 4.) Pp. 7. ...
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    Nature 249 (1974), S. 787-787 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT has been a quite remarkable two months in which the issue of nuclear weapons testing has emerged from the shadows in which it has been lurking for ten years. The United States and Soviet Union have made noises about a further treaty; India has detonated her first device; China has fired another ...
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    Nature 249 (1974), S. 787-787 
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    Notes: [Auszug] MR. JAMES LICK, of San Francisco, California, having in the course of his life accumulated a large fortune, has recently-concluded a deed by which he conveys all his property to seven persons upon trust to be applied to various worthy objects. Among these, 7oo,ooo dols. are to be applied to the ...
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    Nature 249 (1974), S. 788-789 
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    Notes: [Auszug] "I FOUND long ago that I cannot live happily without the Galapagos Islands; even if I am not there I need to know that they exist undestroyed by goats or men ..." So wrote Peter Kramer, retiring director of the Charles Darwin Station on Santa Cruz in the Galapagos Islands in December 1973. The ...
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    Nature 249 (1974), S. 790-791 
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    Notes: [Auszug] PRESIDENT Nixon returned from his triumphal tour of the Middle East last week armed with a clutch of promises and agreements which once again underline the importance of American science and technology as instruments of foreign policy. During his five-nation spectacular, he dangled the prize of ...
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    Nature 249 (1974), S. 791-791 
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    Notes: [Auszug] A "NEW ERA" for coal is forecast by the Secretary of State for Energy, Mr Eric Varley, in his introduction to the interim report of the examination into the coal industry (published by the Department of Energy) carried out jointly by the government, the National Coal Board and the mining unions. ...
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    Nature 249 (1974), S. 792-792 
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    Notes: [Auszug] WHILE discussions continue on the design-and location-of JET, the Joint European Tokamak, plans are ready for a start in La Jolla next month on the first of the new generation of thermonuclear fusion machines. These are the machines plasma physicists believe will demonstrate later this decade the ...
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    Nature 249 (1974), S. 792-792 
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    Notes: [Auszug] INTENSIFIED pressure on the part of the Soviet authorities would seem to have dealt a death-blow to the Moscow 'underground' seminar on "Collective Phenomena and the Applications of Physics to Other Fields of Science" scheduled for July 1-5, 1974. A wave of arrests in the Soviet Union of Jewish ...
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    Nature 249 (1974), S. 793-793 
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    Notes: [Auszug] THE British government has accepted in principle the main recommendations contained in the report of a committee which enquired into causes of the London smallpox outbreak of 1973, when two people died and widespread disruption was caused as vaccination was demanded for four to five millions. The ...
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    Nature 249 (1974), S. 793-793 
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    Notes: [Auszug] CITIZENS of the United States are entitled under their constitution to bear arms, and they believe in using them. In addition to shooting public figures and wild game, they are also accustomed to collect any rarities they encounter "for scientific purposes". There is a conspiracy of silence over ...
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    Nature 249 (1974), S. 794-794 
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    Notes: [Auszug] SIR,-As a qualified and practising scientist I wish to dissociate myself from your editorial of April 12. You allude to Geller and Velikovsky with terms like "nonsenses", "beliefs beyond science", and "pseudo-scientific T3eas", and contrast these with "real science" and "science based on ...
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    Nature 249 (1974), S. 794-794 
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    Notes: [Auszug] SIR,-Your correspondent Brian Ford comments (Nature, May 24) on the abundance of data and paucity of concepts in cancer research. A cursory survey of the literature strongly supports this point. For example, 10 randomly chosen issues of Excerpta Medica-Cancer were found to cite about four thousand ...
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    Nature 249 (1974), S. 794-794 
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    Notes: [Auszug] SIR,-The President of the Geological Society of London, the Director of the Institute of Geological Sciences and Professor P. Allen have informed us1 "that geophysics is a necessary and important part of geology" and in case the reader misses the point they say it again "... of earth science, that ...
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    Nature 249 (1974), S. 795-796 
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    Notes: [Auszug] IT has been known since the work of Pott in the eighteenth century that certain forms of cancer are associated with certain occupations and it is now generally accepted that the disease can be and is caused by chemicals in the environment. The number of chemicals that have been shown experimentally ...
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    Nature 249 (1974), S. 796-797 
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    Notes: [Auszug] THE Earth's atmosphere is extremely effective in filtering out that part of the Sun's ultraviolet radiation which is harmful to life, that is, radiation with wavelengths below about 300 nm. Ultraviolet radiation with shorter wavelengths, below about 200 nm, is absorbed by molecular oxygen, O2. The ...
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    Nature 249 (1974), S. 797-797 
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    Notes: [Auszug] SCHINDLER of the Freshwater Institute, Winnipeg, has described in Science (184, 897-898; 1974) the effects on the growth of planktonic algae of fertilising small, unproductive Canadian lakes with compounds of phosphorus, nitrogen and carbon. If nitrogen or carbon were added there was no marked ...
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    Nature 249 (1974), S. 798-798 
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    Notes: [Auszug] RARITY is an attribute which makes an organism peculiarly attractive to mankind, even to biologists. When many rare organisms are gathered together in one place, it is inevitable that biological attention should be focused on that spot. In the British Isles there is no better example of this than ...
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    Nature 249 (1974), S. 799-799 
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    Notes: [Auszug] DURING the past few years there has been great interest in determining the sizes of atomic nuclei, and in particular the relative spatial extents of the constituent neutron and proton distributions. The proton distributions can be determined accurately from analyses of electron elastic scattering ...
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    Nature 249 (1974), S. 798-799 
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    Notes: [Auszug] Two years ago Dixon and Postgate reported (Nature, 237, 102; 1972) their success in transferring nitrogen-fixing ability from a N2-fixing strain of Kleb-siella pneumonia to the common colon bacteria Escherichia coli. Greater complications in using plant nodule bacteria from the genus Rhizobium as ...
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    Nature 249 (1974), S. 799-800 
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    Notes: [Auszug] THE discovery that many animal messenger RNA molecules contain regions of poly(adenylic) acid is of considerable interest (see Nature, 247, 426 and 512; 1974). One reason for this is that the presence of poly(A) confers specific properties on mRNA molecules which can be exploited during RNA ...
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    Nature 249 (1974), S. 800-800 
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    Notes: [Auszug] THE long predicted nuclear magnetic ordering transition in solid 3He seems to have been observed at a temperature of 1.17 mK in an experiment carried out at Cornell University by Halperin, Archie, Rasmussen, Burhman and Richardson, and reported in a recent issue of Physical Review Letters (32, 927; ...
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    Nature 249 (1974), S. 800-801 
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    Notes: [Auszug] NEAR the crests of active oceanic ridges the mean heat flow is generally higher than the global average, and measurements are considerably more scattered than those in, for example, typical ocean basins. Both of these observations are explicable in general terms, for hotter mantle-derived material ...
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    Nature 249 (1974), S. 801-801 
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    Notes: [Auszug] THE number of adders (Vipera berus) present in the British Isles seems to be reasonably healthy; as this distribution map shows, records of sitings have been returned from most parts-except, of course, from Ireland. As the new Provisional Atlas of the Amphibians and Reptiles of the British Isles ...
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    Nature 249 (1974), S. 802-802 
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    Notes: [Auszug] ONE of the key links in the developing theory that atmospheric circulation (and hence climate) on Earth is affected by solar activity has been provided by evidence that geomagnetic activity can be connected with a deepening of troughs in the atmosphere. But although evidence presented by Roberts ...
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    Nature 249 (1974), S. 802-802 
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    Notes: [Auszug] ONE of the greatest drawbacks to the theories which purport to explain the factors causing vole population cycles is their relative untestability (for example, Chitty, Can. J. ZooL, 38, 99; 1960; Christian and Davis, /. Mammal., 47, 1; 1966) and recent attempts to elucidate behavioural or genetic ...
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    Nature 249 (1974), S. 803-805 
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    Notes: [Auszug] The experiments of Hershey and Chase, giving evidence that DNA is the genetic material, have been greatly simplified and modified in subsequent descriptions. Students are in danger of receiving a quite misleading impression of the process of scientific ...
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    Nature 249 (1974), S. 805-810 
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    Notes: [Auszug] The protein components of the enzyme system nitrogenase, responsible for the fixation of nitrogen by microbes, have been purified and characterised from several sources. Examination by physicochemical and kinetic methods is revealing an elaborate reaction mechanism involving electron transport from ...
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    Nature 249 (1974), S. 810-812 
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    Notes: [Auszug] Chlorofluoromethanes are being added to the environment in steadily increasing amounts. These compounds are chemically inert and may remain in the atmosphere for 40–150 years, and concentrations can be expected to reach 10 to 30 times present levels. Photodissociation of the ...
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    Nature 249 (1974), S. 812-814 
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    Notes: [Auszug] A multiparameter, nonlinear, weighted routine was used to fit least squares (see refs 6 and 7). This program yields values of the unknown parameters of any generalised mathematical model which is applied to input data, together with relevant statistics, including the approximate 95% confidence ...
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    Nature 249 (1974), S. 814-816 
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    Notes: [Auszug] Fig. 1 Schematic representation of the detector system indicating the location of the five spectrometer plates and the target emulsion stack. Table 1 Number of nuclei as a function of charge group and rigidity Rigidity interval (GV) Charge group 4-7 Fig. 2 Rigidity spectrum. The histogram ...
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    Nature 249 (1974), S. 816-817 
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    Notes: [Auszug] Table 1 Comparison of observed and predicted number of equi-event areas No. of Observed no. of events squares assuming per square Poissonian distribution 0 285 1 67 2 7 3 1 4 0 Expected no. of squares assuming Poissonian distribution 284.8 ...
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    Nature 249 (1974), S. 817-818 
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    Notes: [Auszug] The nitric oxide instrument is a chemiluminescent detector based on the luminescent reaction of nitric oxide with excess ozone in a flow reactor. The photon count rate signals from the detector are proportional to the atmospheric nitric oxide mixing ratio and to the STP flow rate of the atmospheric ...
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    Nature 249 (1974), S. 818-820 
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    Notes: [Auszug] The first point concerns the relative merits of the various mixing models. The earlier calculations5 raise doubts about the validity of the more pessimistic mixing models1"4 because they indicate that a system reasonably close to equilibrium can only accommodate the predicted Cx and pcd values if ...
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    Nature 249 (1974), S. 820-821 
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    Notes: [Auszug] It has been argued that frictional heating along slip zones between subducting and overriding plates provides the heat for partial melting1'2. At hot spots the suggested sources of heat are more controversial, ranging from shear heating in the asthenosphere3 to more vague sources associated with ...
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    Nature 249 (1974), S. 821-822 
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    Notes: [Auszug] The deposits included in the term 'massive sulphide' are stratiform and wholly or largely composed of sulphides of iron with varying proportions of the sulphides of copper, lead and zinc, and minor gold and silver. Stratiform, massive oxide deposits (largely magnetite and/or haematite) are related ...
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    Nature 249 (1974), S. 822-824 
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    Notes: [Auszug] Loch Etteridge (grid ref. NN688929) lies in a deep kettle hole bordered by eskers and kame terraces at an altitude of 300 m, in upper Strathspey. The deepest accessible part of the kettle infill was sampled using a piston corer with a chamber 50 cm long and 5 cm in diameter. Seven metres of peat ...
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    Nature 249 (1974), S. 824-825 
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    Notes: [Auszug] During test excavations in the summer of 1973 human bones and obsidian artefacts2'3 were found at the new Mostin site (SDA-66), located 16 km north-west of the Borax Lake site. The Mostin site (39°N; 122°50/W) is situated along Kelsey Creek about 2.5 km south of Clear Lake and 5 km from the nearest ...
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    Nature 249 (1974), S. 827-828 
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    Notes: [Auszug] Table 1 The distribution of 106 metaphase figures Appearance of chromatids Banded Intermediate Visible helix Homogeneous Total Separation Separate 0 1 38 0 39 of Partly sister separate 0 26 1 4 chromatids, Closely apposed 36 0 0 0 36 Total 36 27 39 4 106 Chinese ...
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    Nature 249 (1974), S. 825-827 
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    Notes: [Auszug] But we also know that x-particles produced in 21 ~ infected bacteria cannot be further matured after temperature shift-down, although they are morphologically identical to those produced in 24 ~ infected cultures1*6. Here we shall demonstrate that the uncleaved P23 is organised in the form of a ...
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    Notes: [Auszug] Recently, several groups have induced virus-like particles in tissue cultures of a wide variety of normal and neoplastic guinea pig cells using S-bromo^'-deoxyuridine (BrdU) (refs 6-9). Guinea pig cells treated with BrdU contain intra-cytoplasmic A particles7'8 and produce extracellular virus-like ...
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    Nature 249 (1974), S. 830-833 
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    Notes: [Auszug] Bovine associated mucoprotein is a constituent of the fat globule membrane which is formed by vesicular secretion from the alveolar epithelial cells of the bovine mammary gland. Jackson et al,6 determined a molecular weight of 123,000 for BAMP by analytical ultracentrifugation, although lyophilised ...
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    Nature 249 (1974), S. 833-834 
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    Notes: [Auszug] Papain-solubilised H-2 alloantigens were isolated from 600 A/J spleens essentially as described for HL-A antigens4. To achieve further purification, part of the alloantigen containing material was labelled with 125I and 131I (ref. 10) and incubated separately with H-2Ka and H-2Da alloanti-sera. The ...
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    Notes: [Auszug] T and B lymphocytes were obtained as described in the legend to Table 1. Between 45 and 75% of peripheral blood lymphocytes were recovered as E-rosette-forming cells and 5-35% as EAC-rosette-forming cells. These high rates of recovery suggest that the subsequent biological studies are ...
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    Nature 249 (1974), S. 837-838 
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    Notes: [Auszug] Female Syrian hamsters, 110-180 g, were heterografted with a CEA-producing colonic adenocarcinoma of human origin continuously propagated in hamsters4. CEA, purified from liver metastases of human colonic adenocarcinomas (E. S. Newman, H. J. Hager and H. J. H., manuscript in preparation), was ...
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    Nature 249 (1974), S. 839-841 
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    Notes: [Auszug] To identify the biochemical event involved in the suppression of the TAT inducibility in interspecific hybrid clones, we have analysed a series of rat-mouse and rat-human suppressed hybrid clones for corticosteroid receptor activity and for their ability to transfer the dexamethasone-receptor ...
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    Nature 249 (1974), S. 841-843 
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    Notes: [Auszug] Activation of the complement cascade intravascularly by the alternate pathway was achieved in New Zealand White rabbits or Hyline Sandy Lop rabbits, weighing approximately 2.5 kg, by intravenous injection 0.6-1.0 ml of purified cobra venom factor or 50 mg of a suspension of inulin (Sigma). The CVF ...
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    Nature 249 (1974), S. 843-845 
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    Notes: [Auszug] Large dense core vesicles were isolated from bovine splenic nerves using differential and density gradient centrifugation12'13. The supernatant obtained after centrifugation of the nerve homogenate at 10,500#max for 10 min was layered on sucrose-D2O gradients (linear from 0.25 M to 0.6 M with a ...
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    Nature 249 (1974), S. 845-847 
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    Notes: [Auszug] Closer inspection of the portion of the bicuculline molecule that is isosteric with GABA reveals that it contains two asymmetric centres and thus four optical isomers are possible. Such variation in the optical properties would be unlikely to change interatomic distances along the skeleton of the ...
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    Nature 249 (1974), S. 847-850 
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    Notes: [Auszug] Recent technical innovations, notably the introduction of the Fourier transform (FT) technique in nuclear magnetic resonance (NMR) (ref. 1) have made determinations of 7\ almost routine. There are several reports of the measurement of 7\ values of imidazole C2 protons of histidine residues in ...
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    Notes: [Auszug] Miller et al. showed that active AAF-intermediates are mutagenic in a test system involving in vitro interactions with transforming DNA followed by inoculation of the latter into a suitable strain of B. subtilis1*1. More recently Ames et al. have found that 18 of 20 chemical carcinogens that were ...
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    Nature 249 (1974), S. 852-854 
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    Notes: [Auszug] A number of different mutant alleles at the mottled locus are known and these are listed, together with their pheno-typic effects, in Table 1. In all cases where the male hemizy-gote survives beyond birth, the resulting mouse shows a severe dilution in hair pigment (Fig. 1), although the individual ...
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    Nature 249 (1974), S. 854-855 
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    Notes: [Auszug] It seemed possible that DOPA might be a metabolite of the living bacilli and that radioactive atoms within the molecule would become incorporated into macromolecules within the living organism. We have shown this to be the case by high resolution autoradiography. Bacterial suspensions were prepared ...
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    Nature 249 (1974), S. 855-856 
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    Notes: [Auszug] Fig. 1 Cumulative incubation periods for VL mice injected intraperitoneally (i.p.) as adults (21-42 d old) with 10% brain homogenate (500#, 10 min supernate) of 79A-strain scrapie agent (O) or 22C agent (A); with (----------) or without (--------) the following high-dose prednisone acetate regime. ...
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    Nature 249 (1974), S. 856-858 
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    Notes: [Auszug] Fig. 1 The attachment of IKe particles to the surface of E. coli RM98+ cells (x 81,600). The scale represents 100 nm. Table 1 Adsorption of Ml3 and IKe to formalin killed F42+ and RM98+ cells Experiment Plasmid Phage MOI Treatment of Phage input C.p.m. ml"1 recovered Unadsorbed phage ...
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    Nature 249 (1974), S. 858-860 
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    Notes: [Auszug] We have used a,/?-methhylene adenosine 5'-diphosphate (AOPCP), an analogue of ADP, to determine whether ADP undergoes transphosphorylation to AMP and ATP during photosynthetic ATP formation. Since the two phosphates in AOPCP are linked by a non-hydrolysable-methylene group4, this ADP analogue ...
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    Nature 249 (1974), S. 860-860 
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    Notes: [Auszug] Tt is significant that not all fungi to which cut logs of A. africana are exposed gain entrance to the wood through vessels. Phialophora fastigiata, a sap stainer with a tendency to behave like a soft-rot fungus enters the wood through the ray parenchyma cells from which it ramifies into the ...
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    Nature 249 (1974), S. 861-862 
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    Notes: [Auszug] SIR,-The demonstration by Eiberg1 of equal sized Giemsa-stained paired dots in the centromeric regions of human chromosomes, raises the question of whether these dots are equivalent to, or associated with, the paired spheres, or dots, observed in these regions in chromosomes preparations handled in ...
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    Nature 249 (1974), S. 863-863 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-The extravagant claims presented in a recent article by Winterberg1, led me to look into the background of the idea of 'magnetic insulation'. The purpose of this letter is to point out that the scheme described in that article is unsound and will not work. The basic idea in Winterberg's ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 862-863 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-In a study concerning the labelling of the X chromosomes of heterozygous Dp(l;f) AM female larvae, Bender, Barr and Ostrowski1 compared the absolute amount of silver grains distributed over the 1AB region of the paired X chromosomes (compound X) with the absolute amount of labelling over the ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 863-863 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR WINTERBERG REPLIES: Contrary to Blewett's belief, magnetic insulation has not only been experimentally confirmed2 since I proposed it several years ago1, but is already utilised in the coaxial transmission lines of relativistic electron beam generators (for example, the MJ Aurora machine). The ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 863-863 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-Recently, Goldstein1 reported on the isolation of two polypeptide hormones from bovine thymus. He suggests and extensively uses the terms thymin I and thymin II to designate these hormones. The choice of these names seems unfortunate because of a possible confusion with thymine ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 863-864 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR GOLDSTEIN REPLIES : The points made by Dr Roth are well taken. The name thymin was originally assigned1 to designate a hormone of the thymus by the traditional '-in' suffix (as for insulin and renin). At that time we avoided naming the hormone by its action as we were uncertain whether the ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 864-864 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-Schatzmann1 has described a positive correlation between ouabain-sensitive ATPase activity and red cell K levels in cattle, cells with higher K levels giving a greater enzyme activity. These determinations were made with Na=150 mM, K=10mM. If ouabain-sensitive ATPase is determined as a ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 864-864 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR SCHATZMANN REPLIES: The marked variability of the K affinity of the internal Na site found by Dr Ellory renders untenable my tacit assumption that the ATPase activity measured at 10 mM K and 100 mM Na reflects the number of pump sites per cell. But unless our conditions of Na concentration, pH ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 864-864 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-To demonstrate that in Ph^-posi-tive cells the additional band at the end of the long arms of chromosome 9 (9q-h) stems from chromosome 22, Rowley1 suggested the examination of metaphases derived from bone marrow from patients with Pfr-negative chronic myelocytic leukaemia (CML). We studied ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 865-866 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE writings of the late Alexandre Koyre never fail to reveal the intimacy of the union between the history and the philosophy of science. His interpretation of The Astronomical Revolution, first published in French in 1961 and now in an English translation is, to quote the author's own expression ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 866-867 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE agent causing yellow fever was shown to be a virus only in 1927. By 1950 about 20 other arthropod viruses, or arboviruses, had been discovered, mostly as a result of work primarily on yellow fever, but now more than 300 such viruses are known. This great increase in the numbers of known ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 867-867 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE first chapter of this book deals briefly, but adequately, with a general appraisal of the embryology, morphology and physiology of the pituitary gland. The next few chapters deal with morphology and cytology of the various parts of the gland in mammals beginning with the pars distalis. Perhaps ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 867-868 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS is an interesting new book on vertebrate morphology, set in clear, readable type and well illustrated. The adjective "comparative" in the title is fully justified, each organ system being illustrated for an example of each extant class or order, as appropriate, and the text similarly trying to ...
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    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 868-868 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I FIND little merit in this book. For one thing the production is poor. The reproduction of most of the 84 colour plates is bad, of some very bad and of two upside down. It is claimed to be encyclopaedic but the widespread and dangerous viper, Echis carinatus, receives scant mention and none in the ...
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