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  • 11
    Electronic Resource
    Electronic Resource
    Abnormalities in the Vertebral Column of the Common Frog (1886)
    [s.l.] : Nature Publishing Group
    Nature 35 (1886), S. 53-53 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN preparing skeletons of the frog, my students came aeross the following abnormalities in the vertebral column, a record of which may be not without interest:— (1) In a large Rana temporaria, the centrum of the eighth vertebra, instead of being biconcave (amphiccelous), is concavo-convex ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/035053c0
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  • 12
    Electronic Resource
    Electronic Resource
    Some Experiments on the Viscosity of Ice (1885)
    [s.l.] : Nature Publishing Group
    Nature 32 (1885), S. 16-17 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THAT ice will change its form under the influence of pressure o*o is exemplified at large in glaciers, and may be illustrated by experiments in the laboratory. How far this is due to a true viscosity, and how far to a rearrangement of the particles by melting and regelation, is a question the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/032016a0
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  • 13
    Electronic Resource
    Electronic Resource
    The Swimming Instinct (1901)
    [s.l.] : Nature Publishing Group
    Nature 64 (1901), S. 208-208 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE just tested the inherited powers of swimming in newly hatched pheasants. I find that when placed in tepid water, at the age of about thirty hours, they swim easily with well-coordinated leg-movements and show very little signs of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/064208a0
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  • 14
    Electronic Resource
    Electronic Resource
    Suicide of Scorpions (1883)
    [s.l.] : Nature Publishing Group
    Nature 27 (1883), S. 313-314 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SPEAEKING of scorpion suicide, Mr. G. J. Romanes in his “Animal Intelligence writes: “Still I think that so remarkable a fact unquestionably demands further corroboration before we shall be justified in accepting it unreservedly” (p. 225). Some years ago I made some experiments and observations ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/027313b0
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  • 15
    Electronic Resource
    Electronic Resource
    Scorpion Suicide (1883)
    [s.l.] : Nature Publishing Group
    Nature 27 (1883), S. 530-530 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I AM sorry that my experiments on scorpion suicide has given pain to some of your correspondents. Allow me to explain in a few words the object of my investigation. It is commonly believed in this colony and elsewhere that scorpions commit suicide; Dr. Allen Thomson, in a letter to NATURE, lent ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/027530a0
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  • 16
    Electronic Resource
    Electronic Resource
    Instinct (1884)
    [s.l.] : Nature Publishing Group
    Nature 29 (1884), S. 405-405 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WERE it merely for the sake of reiterating my views, I should not feel justified in commenting upon Mr. Romanes' letter on instinct in last week's NATURE (p. 379). He seems, however, to have understood my “subjective verification” in a sense somewhat different to that which I intended to convey ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/029405a0
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  • 17
    Electronic Resource
    Electronic Resource
    Organization of corneal afferent axons in the trigeminal nerve root entry zone in the cat (1987)
    Springer
    Experimental brain research 68 (1987), S. 411-416 
    Details
    ISSN: 1432-1106
    Keywords: Trigeminal organization ; Cornea ; HRP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Experiments were carried out in cats to learn the location of sensory axons from the cornea in the trigeminal nerve root just prior to its entry into the brainstem. HRP injected into the cornea labelled these axons and indicated they were not restricted to the ophthalmic division of the nerve root as had been indicated from previous studies. These findings, if representative of other branches of this nerve, offer a partial explanation for the variable preservation of function following transection of an entire division of the trigeminal nerve root in cases of trigeminal neuralgia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248806
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  • 18
    Electronic Resource
    Electronic Resource
    Analysis of fluorescence transients of DCMU-treated leaves of Triticum species to provide estimates of the densities of photosystem II reaction centres (1986)
    Springer
    Photosynthesis research 7 (1986), S. 203-219 
    Details
    ISSN: 1573-5079
    Keywords: fluorescence induction ; photosynthesis ; photosystem II ; Triticum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fluorescence of the chlorophyll associated with photosystem II was studied in seedling and flag leaves of Triticum species. Seedling leaves of the diploid species T. urartu had higher values of t (the normalised area over the fluorescence induction curve of DCMU treated leaves) than those of the other species studied which included hexaploid T. aestivum. However this difference was not evident when leaves were grown in a low light intensity (40 µmol quanta of photosynthetically active radiation m−2 s−1). The smaller total number of chlorophyll molecules per photosystem II reaction centre (chl/RCII) in T. urartu (177) as compared with the other species (mean 234) was deduced from the observed differences in t. As a consequence of its lower chl/RCII, despite slightly lower chlorophyll content (mg m−2), T. urartu had a greater density of reaction centres than the other species (2880 cf 2230 nmol m−2 of leaf). Consistent with the lower chl/RCII of T. urartu, it had a higher chlorophyll a/b ratio than the other genotypes. Seedling leaves of T. urartu had higher light saturated rates of photosynthesis than those of the other species, when grown at high light, a difference associated with reaction centre density. In flag leaves, when the complications due to variable development and senescence patterns were eliminated, t of the diploid species including T. urartu was lower than that of T. aestivum. The lower apparent chl/RCII of T. urartu arose partly because the molar extinction coefficient of the chlorophyll in the leaves of T. urartu was greater than in T. aestivum. However, the density of PS II reaction centres was slightly lower for the diploid species studied because their chlorophyll contents were lower than the hexaploids. The validity of the method for estimating chl/RCII from fluorescence transients is discussed. The possibility is considered that the difference in apparent chl/RCII of flag and seedling leaves of R. urartu as compared to the other five genotypes is a consequence of its different adaptive response to the spectral quality of the light.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014675
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  • 19
    Electronic Resource
    Electronic Resource
    Estimation of the light distribution between photosystems I and II in intact wheat leaves by fluorescence and photoacoustic measurements (1986)
    Springer
    Photosynthesis research 7 (1986), S. 257-267 
    Details
    ISSN: 1573-5079
    Keywords: Chlorophyll a fluorescence ; photoacoustic spectroscopy ; photosystem I ; photosystem II ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Usisng intact leaves, the extent of the decrease in chlorophyll a fluorescenece caused by the addition of continuous 710 nm light superimposed on modulated (20 Hz) 550 nm light was used to determine the distribution of this absorbed light between photosystems I (α) and II (β). The Fo and Fm levels, which defined the total variable fluorescenece, were taken as equal to those obtained with excess 710 nm light and with saturating blue-green light, respectively. An analogous procedure was used with a photoacoustic detector, saturating white light defining a base line for oxygen yield, the levels with an without 710 nm light being used to define β and α respectively. The two methods gave similar values for the distribution of light between the two photosystems for the experimental conditions used, β averaging 0.55 for a range of Triticum genotypes and Brachypodium sylvaticum grown in high or low light.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014679
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