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  • 2005-2009  (61)
  • 1985-1989  (38)
  • 1980-1984  (26)
  • 1955-1959  (11)
  • 1935-1939  (2)
  • 1910-1914
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  • 1
    Electronic Resource
    Electronic Resource
    Infrared spectra of the cluster ions H7O+3⋅H2 and H9O+4⋅H2 (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 2328-2329 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Infrared spectra of hydrated hydronium ions weakly bound to an H2 molecule, specifically H7O+3 ⋅H2 and H9O+4 ⋅H2, have been observed. Mass-selected parent ions, trapped in a radio frequency ion trap, are excited by a tunable infrared laser; following absorption, the complex predissociates with loss of the H2, and the resulting fragment ions are detected. Spectra have been taken from 3000 to 4000 cm−1, with a resolution of 1.2 cm−1. They are compared to recent theoretical and experimental spectra of the hydronium ion hydrates alone. Binding an H2 molecule to these clusters should only weakly perturb their vibrations; if so, our spectra should be similar to spectra of the hydrated hydronium ions H7O+3 and H9O+4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451079
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrational spectroscopy of the hydrated hydronium cluster ions H3O+⋅(H2O)n (n=1, 2, 3) (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 7319-7330 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The gas phase infrared spectra of the hydrated hydronium cluster ions H3O+⋅(H2O)n(n=1, 2, 3) have been observed from 3550 to 3800 cm−1. The new spectroscopic method developed for this study is a two color laser scheme consisting of a tunable cw infrared laser with 0.5 cm−1 resolution used to excite the O–H stretching vibrations and a cw CO2 laser that dissociates the vibrationally excited cluster ion through a multiphoton process. The apparatus is a tandem mass spectrometer with a radio frequency ion trap that utilizes the following scheme: the cluster ion to be studied is first mass selected; spectroscopic interrogation then occurs in the radio frequency ion trap; finally, a fragment ion is selected and detected using ion counting techniques. The vibrational spectra obtained in this manner are compared with that taken previously using a weakly bound H2 "messenger.'' A spectrum of H7 O+3 taken using a neon messenger is also presented. Ab initio structure and frequency predictions by Remington and Schaefer are compared with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457305
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  • 3
    Electronic Resource
    Electronic Resource
    Induced Plant Responses to Herbivory (1989)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 20 (1989), S. 331-348 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.20.110189.001555
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of the rubber content in guayule bushes by carbon-13 nuclear magnetic resonance spectrometry (1981)
    s.l. : American Chemical Society
    Analytical chemistry 53 (1981), S. 1570-1572 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00234a007
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  • 5
    Electronic Resource
    Electronic Resource
    CORRELATION OF ROCK DENSITY DETERMINATIONS FOR GRAVITY SURVEY INTERPRETATION (1957)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 5 (1957), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The results of field and laboratory methods of density determination on a series of Coal Measure, Permian and Triassic rooks are presented and the different methods compared. It is concluded that the most satisfactory method is that of measuring the vertical change of gravity in a mine shaft. Nettleton's method is unsatisfactory to us, due to weathering of the rocks (particularly Magnesian Limestone) and possible effects from drift. Laboratory measurements are of variable value depending on the lithology and source of the samples.A method adopted to solve the problem of finding the true densities for use in a local gravity survey in N.E. England is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1957.tb01421.x
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  • 6
    Electronic Resource
    Electronic Resource
    Clinical guidelines in severe pre-eclampsia and eclampsia (2005)
    Bradford : Emerald
    Clinical governance 10 (2005), S. 291-299 
    Details
    ISSN: 1477-7274
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Medicine , Economics
    Notes: Purpose - This article aims to assess the standard local recommended management of women with severe pre-eclampsia and eclampsia in relation to recommendations in a national clinical guideline using a criterion-based survey. Design/methodology/approach - A total of 227 maternity units in the UK were asked to provide a copy of their guideline for the management of severe pre-eclampsia and eclampsia. Responses were obtained from 107 units (47.1 per cent), 37 units were using regional guidelines and 72 guidelines were available for assessment. A total of ten audit criteria were agreed by committee, based on national recommendations. Guidelines were then audited to assess concurrence with these criteria. Findings - The standard of guidelines was highly variable with only four guidelines (4.5 per cent) satisfying all ten key guideline points. The majority of guidelines had clear criteria for inclusion (87.5 per cent) but in almost a quarter of all guidelines no mention was made of informing consultant staff once these criteria were met. Practical implications - The study shows that the standard of local guidelines for management of these potentially fatal conditions is highly variable. Confidential inquiry has repeatedly recommended the use of regional guidelines. Perhaps it is time for the development of a national guideline representing consensus agreement of an evidence-based approach. Originality/value - In the UK eclampsia and pre-eclampsia continue to be a leading cause of maternal mortality and morbidity. This paper provides a valuable insight into the standard of guidelines used in the management of these conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14777270510629345
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  • 7
    Electronic Resource
    Electronic Resource
    The age of (a tiny part of) the Australian continent (1985)
    [s.l.] : Nature Publishing Group
    Nature 317 (1985), S. 559-560 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SCH„RER and All¨gre1, using isotope dilution analysis of single grains and fragments of zircon, recently failed to substantiate a report by Froude et al.2, based on the ion microprobe SHRIMP3, of zircons older than 4,100 Myr from Mt Narryer, Western Australia. In their discussion, Sch¤rer and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/317559c0
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  • 8
    Electronic Resource
    Electronic Resource
    Ion microprobe identification of 4,100–4,200 Myr-old terrestrial zircons (1983)
    [s.l.] : Nature Publishing Group
    Nature 304 (1983), S. 616-618 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Simplified geological map of the Mt Narryer region showing:o·, Location of dated gneisses with Sm-Nd model ages1 in Myr. +, Location of quartzite samples (+A, GSWA sample site 71932; +B, GSWA sample sites 71921 and 71924). The quartzites in which the zircons occur are part of a thick ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/304616a0
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  • 9
    Electronic Resource
    Electronic Resource
    Perception of apparent motion by commissurotomy patients (1986)
    [s.l.] : Nature Publishing Group
    Nature 320 (1986), S. 358-359 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We investigated motion perception by commissurotomy patients whose corpus callosum, anterior commissure, hippo-campal commissure and massa intermedia (when encountered) had been sectioned surgically for the treatment of intractable epilepsy3'4. An intact corpus callosum is presumed to be involved ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/320358a0
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  • 10
    Electronic Resource
    Electronic Resource
    The geological results of measurements of gravity in East Carmarthenshire (1955)
    Springer
    Pure and applied geophysics 32 (1955), S. 43-53 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Observations of gravity over the Palaeozoic rocks of East Carmarthenshire show this to be an area of positive Bouguer anomalies, and throughout the district the isogams are aligned in a «Caledonoid» direction. The regional gradient over the anthracite coalfield can largely be explained in terms of known structure, while the anomaly values in the Towy valley above Llandeilo seem to have been affected by facies variations and contemporaneous volcanic activity. Fairly large anomalies are recorded near Carmarthen, and these may be associated with similar anomalies known near Aberystwyth (Cook & Thirlaway, 1950); they are interpreted as an expression of the Welsh geosyncline. The gravity low discovered in St. George's Channel byBrowne & Cooper (1950) is re-interpreted in terms of the depth of the pre-Palaeozoic floor. There is no marked evidence to indicate the presence of a concealed «granitic» intrusion beneath the coalfield, nor to substantiate the view that there was once a great thickness of Permian or later cover.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01993595
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