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  • 1
    Electronic Resource
    Electronic Resource
    IX.—Descriptions of New Species of Fossils, from the Upper Silurian Rooks of Port Jervis, N. Y.; with Notes on the occurrence of the Goralline Limestone at that Locality (1879)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 1 (1879), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1879.tb55114.x
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  • 2
    Electronic Resource
    Electronic Resource
    Reflectance anisotropy spectroscopy study of the surface reconstructions of decapped InP(001) (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 480-485 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A reflectance anisotropy spectroscopy (RAS) and low-energy electron diffraction study of the InP(001) surface is presented. The surface was prepared by thermal desorption of an As-P capped epilayer grown by molecular beam epitaxy. RA spectra have been monitored over a spectral range of 1.5–5.5 eV at regular intervals during thermal decapping and annealing up to the point of decomposition (553–973 K). Each of the RA spectra of the surface reconstructions comprise positive (at 2.9 eV) and negative (at 1.8 eV) anisotropies which have been previously associated with P- and In-related bonding, respectively. Unlike other III-V (001) semiconductor surfaces, the evolution of different reconstructions cannot be explained in terms of a change in surface stoichiometry which involves loss of the anion species. In the case of InP(001) the P species contributes to the clean surface reconstruction from the early stages of decapping to the point of decomposition. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366718
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  • 3
    Electronic Resource
    Electronic Resource
    Utilization of Photoemission Cross-Section Effects for Monitoring Thin-Film Growth in UHV (1995)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 2 (1995), S. 252-255 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Given the tunability of synchrotron radiation, photoemission spectroscopy can be used to monitor the growth modes of thin films in UHV. Cross-section effects such as Cooper minima and resonant photoemission can be exploited to maximize the adsorbate signal and minimize that from the substrate. Under favourable circumstances growth can be monitored in real time at coverages of 〈1%. As an example the growth of Gd on W(110) is investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0909049595008697
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  • 4
    Electronic Resource
    Electronic Resource
    Photoemission Study of CO Adsorption on Gd (1995)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 2 (1995), S. 312-315 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Angle-resolved UV photoemission spectroscopy has been used to investigate the interaction of CO with Gd films, grown on W(110). The results suggest the CO absorbs dissociatively, initially forming Gd2O3, with subsequent catalytic oxidation of CO to form carbonate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S090904959501137X
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  • 5
    Electronic Resource
    Electronic Resource
    Gd/W(110) Interface Formation Studied by W 4f Surface Core-Level Spectroscopy (1995)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 2 (1995), S. 261-263 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: W 4f core-level spectra of Gd films on W(110) show components which can be identified as being due to bulk and interface W. The results suggest that the W/Gd interface is abrupt, i.e. no interface alloying occurs. At submonolayer coverages a further component is seen which is attributable to intermediate (n × 2) phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S090904959500954X
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  • 6
    Electronic Resource
    Electronic Resource
    Ice Crystals and Filaments (1880)
    [s.l.] : Nature Publishing Group
    Nature 21 (1880), S. 537-537 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SOMETHING very like the “comb-like masses of ice” appears upon the surfaces of plaster-models such as dentists make, after they have been coated with a preparation called Liquid Silex; except that it is finer and woolly. It seems to be caused by the contraction of the models forcing out very ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/021537c0
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  • 7
    Electronic Resource
    Electronic Resource
    The Microphone (1878)
    [s.l.] : Nature Publishing Group
    Nature 18 (1878), S. 540-540 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE form of microphone described by Mr. Gerald B. Francis (NATURE, vol. xviii. p. 383) is easily made and very efficient. It not only did for me all its inventor promised, but with a common tumbler inverted over it upon the sounding-board so as to prevent direct impact of sound waves upon the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/018540d0
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  • 8
    Electronic Resource
    Electronic Resource
    Variation in expression of trimorphic incompatibility in Pontederia cordata L. (Pontederiaceae) (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 355-362 
    Details
    ISSN: 1432-2242
    Keywords: Trimorphic incompatibility ; Pontederia cordata L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Pontederia cordata L. (Pontederiaceae), a perennial diploid, possesses the rare genetic polymorphism tristyly. A controlled pollination programme was conducted over a three year period, under glasshouse conditions, on 36 clones of P. cordata var. cordata to examine the nature of the self-incompatibility system. The three major findings of the pollination study were: (1) the three floral morphs display different levels of self-incompatibility, (2) pollen from the two anther levels within a flower exhibits different compatibility behaviour in self-pollinations, (3) considerable individual genetic variation in the expression of self-incompatibility is evident among clones within floral morphs. Similar results were also obtained from a smaller study on 15 clones of P. cordata var. lancifolia conducted over a 6 month period. In common with other Pontederia species the mid-styled morph (M) of P. cordata produces large amounts of seed when self-pollinated with pollen from long-level anthers. A developmental model is proposed to explain the high level of self-compatibility of the M morph in Pontederia species. Self-pollination of segregating progenies from M and S morphs of known incompatibility status demonstrated that the expression of incompatibility is closely associated with style length. It is suggested that overall differences in incompatibility behaviour among the floral morphs may be due to the pleiotropic effects of major genes controlling sub-characters of the tristylous syndrome, rather than linked modifier genes. However, the variable expression of trimorphic incompatibility within floral morphs suggests that this variation may be polygenic in origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273739
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  • 9
    Electronic Resource
    Electronic Resource
    Pollinator foraging behavior and pollen collection on the floral morphs of tristylous Pontederia cordata L. (1987)
    Springer
    Oecologia 74 (1987), S. 347-351 
    Details
    ISSN: 1432-1939
    Keywords: Pontederia cordata ; Bombus ; Tristyly ; Pollination ; Behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The foraging behavior of the pollinators of tristylous Pontederia cordata was studied to determine if differences in floral morphology would lead to preferential visitation of the floral morphs. Although nectar production is not different in the three floral morphs, differences in the production and size of pollen grains produced by the three anther levels results in the morphs offering variable amounts of resources to pollen-collecting insects. Bumblebees (Bombus spp.) and the solitary bee Melissodes apicata used P. cordata primarily as a nectar source and therefore did not seem to exhibit any morph preference. In contrast, honeybees visited flowers mainly for pollen and preferred to forage on long-level anthers of the short-and mid-styled morphs. An analysis of the composition of corbicular pollen loads indicated that, relative to the frequency of production in the population: 1) honeybees collected an excess of pollen from long-level anthers; 2) bumblebees collected the three types of pollen without any apparent preference; and 3) M. apicata preferentially collected pollen from the short-level anthers — presumably because their proboscides are modified by the presence of tiny hairs. The results suggest that P. cordata in Ontario is serviced by a diverse, unspecialized pollinator fauna which is not co-adapted to the tristylous floral polymorphism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00378928
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  • 10
    Electronic Resource
    Electronic Resource
    Angle-resolved UV photoemission from Y(0001) (1987)
    Springer
    The European physical journal 66 (1987), S. 375-378 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We observe a number of well defined peaks in the photoemission spectra from Y(0001) over the photon energy range 25 eV〈hv〈60 eV. We believe that one of the features with a binding energy of 1.7 eV is due to emission from states near the upper band edge at the Γ point and that a second nearE F originates from a surface state. We find a large peak at a binding energy of 9.6 eV which is sensitive to the quality of the surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01305429
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