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  • Nature Publishing Group  (3,218)
  • Blackwell Publishing Ltd  (2,234)
  • 2000-2004
  • 1990-1994
  • 1970-1974  (5,452)
  • 1972  (5,452)
Collection
Publisher
Years
  • 2000-2004
  • 1990-1994
  • 1970-1974  (5,452)
Year
  • 1
    Electronic Resource
    Electronic Resource
    On the Supposed “ Kenyapithecus africanus ” Mandible (1972)
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 236-239 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As Pilbeam has pointed out4, these features should be considered as defining a polythetic set, that is, a set that groups specimens having the greatest number of shared features, with no single feature being either essential to group membership or sufficient to make an organism a member of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/240236a0
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  • 2
    Electronic Resource
    Electronic Resource
    Insect Taxonomy (1972)
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 308-309 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-It is not only in Britain that insect taxonomy is regrettably so neglected (Nature, 238, 475 ; 1972). The same situation obtains in many other countries. I am told by colleagues abroad, and am a witness to the problem myself, that the always notoriously limited financial and moral support for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/240308b0
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  • 3
    Electronic Resource
    Electronic Resource
    Australia Antigen as a Marker of Propagation of the Serum Hepatitis Virus in Liver Cultures (1972)
    [s.l.] : Nature Publishing Group
    Nature 236 (1972), S. 78-81 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig.lOrgan culture of human embryo liver 24 h after preparation. Preliminary observations on the irregular production of cytopathic changes by purified fractions of serum containing Australia antigen in monolayer cultures of differentiated human embryo liver cells3 proved unpredictable. More ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/236078a0
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  • 4
    Electronic Resource
    Electronic Resource
    Cancer Research (1972)
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 497-498 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-May I be allowed to correct two statements in the article in your issue of December 1 headed "Lord Zucker-man Defends His Position", in which you refer to remarks I am quoted as having made at a meeting of the British Association for Cancer Research. The first is in the opening sentence, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/240497b0
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  • 5
    Electronic Resource
    Electronic Resource
    MECHANISMS OF PLATELET FUNCTION AS REVEALED BY THE RETENTION OF PLATELETS IN GLASS BEAD COLUMNS (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 201 (1972), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Notes: In von Willebrand's disease, the only in vitro abnormality of platelet function is reduced retention of platelets in glass bead columns. Although this finding suggests that the test reflects an important function in normal hemostasis, its mechanism is poorly understood. The method developed by Bowie and colleagues7 has been used to elucidate some of the variables affecting the test. Heparinized blood is passed rapidly through the column and the percentage of platelets retained in the fourth and fifth ml is calculated. In normal subjects, more than 90% is usually retained. Disturbing the blood markedly decreases retention. Retention spontaneously returns to normal in about 45 minutes after disturbance or within ten minutes after addition of apyrase. Addition of 0.1 μM ADP decreases retention with a maximum effect at ten minutes. The lowered retention caused by disturbing blood appears to result from ADP probably sequestered in the platelet membrane. Slow centrifugation and remixing of blood also reduces retention which is restored by apyrase. Platelets in platelet-rich plasma are not retained in the column even after incubation with apyrase or apyrase plus adenosine deaminase, or after adding ADP. Adding red cell ghosts to platelet-rich plasma improves retention, although not as effectively as erythrocytes. Since ghosts contain virtually no ADP, it is suggested that they act by altering hemodynamics, either causing platelets to enter the marginal zone of plasma so that they contact the beads and tubing, or increasing the turnover of plasma in this zone to permit greater interaction of plasma components with the foreign surfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1972.tb16295.x
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  • 6
    Electronic Resource
    Electronic Resource
    COMPARISON OF TIME, FREQUENCY, AND PHASE MEASUREMENTS IN INDUCED POLARIZATION (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 20 (1972), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: In comparing the similarity between time, frequency, and phase measurements as used in the induced polarization method of geophysical prospecting, parameters must first be defined and the basis for comparison established. The conditions for mathematical equivalence then follow in a natural sequence. Laboratory measurements are made on a variety of rock samples to indicate the type of comparison and correlation expected from field measurements.Results indicate that frequency domain and phase measurements are equivalent, but two frequency domain measurements are needed to produce the same amount of polarization information as a single phase measurement. Frequency and time domain measurements will be similar but never equivalent due to the basic differences in their respective parameter definitions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1972.tb00658.x
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  • 7
    Electronic Resource
    Electronic Resource
    Transpiration and Water Uptake in the Fruit Bodies of Some Hymenomycetes (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 26 (1972), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The relationship between relative humidity and transpiration was studied in the basidiocarps of Coprinus, Amanita, Agaricus, Tricholoma, Collybia and Polyporus. Transpiration decreases with an increase in the humidity and there is virtually no transpiration in nearly saturated air.To determine the relationship between uptake and transpiration, stipes were immersed in solutions of various osmotic ally active substances and inhibitors. Results showed that uptake has no influence on the transpiration.Additional data suggested that uptake in a detached basi-diocarp proceeds as long as the fruit body is young and healthy. Studies with fluorescein dye and mannitol showed that most transpiration occurs at the surface and edges of the hymenium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1972.tb03571.x
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  • 8
    Electronic Resource
    Electronic Resource
    An Electron Microscope Study of Autoinfection in Neogregarines (Sporozoa, Neogregarinida) (1972)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 19 (1972), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. In an electron microscope study of the neogregarine Farinocystis tribolii Weiser 1953 in the fat body of the larvae of the flour beetle Tribolium castaneum, empty oocysts and adjacent sporozoites of the gregarine were found. The empty oocysts contained host cell cytoplasm, a residuum only slightly larger than that in mature oocysts, and some remnants of the oocyst membrane pressed tightly against the inner surface of the wall. Apparently normal sporozoites were found near the empty oocysts and no damaged ones were seen. It is assumed that the sporozoites go on developing in the host, i.e., that autoinfection takes place.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1972.tb03457.x
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  • 9
    Electronic Resource
    Electronic Resource
    Short- and Long-term Effects of High Temperatures (47–49 °C) on Tobacco Leaves. I. Photosynthesis (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 27 (1972), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Detached Nicotiana rustica leaves were exposed for 2 minutes to temperatures in the range 36° to 51°C. Above 45°C, 14CO2 fixation was reduced by half as compared with controls. The fall in 14CO2 fixation continued for 2 1/2 h. Recovery was completed 45 h after the treatment. Above 45°C there was an increase in the labeled cationic and anionic fractions and a decrease in the neutral fractions, both increase and decrease being associated with the impaired CO2 fixation. However, these changes in products were also demonstrated when leaves were exposed to the high temperature after labeling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1972.tb03603.x
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  • 10
    Electronic Resource
    Electronic Resource
    Science Criticism (1972)
    [s.l.] : Nature Publishing Group
    Nature 237 (1972), S. 523-523 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-For a long time it has been the accepted prerogative of every newspaper to criticize the policies and attitudes of any government; any art medium has a following of eager critics Willing to distinguish between the good, the bad and the ugly; and what has science got? Nothing. For some reason ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/237523d0
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