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  • 2000-2004  (1)
  • 1965-1969  (1)
  • 1960-1964  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    The Inductive Effect and Chemical Reactivity. V. Theoretical Dipole Moments of α,ι-Dichloroalkanes and α,ι-Dibromoalkanes1 (1961)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 83 (1961), S. 3785-3788 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01479a014
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Acute increase in femoral artery resistance in response to direct physical stimuli in the human fetus (2003)
    Oxford, UK : Blackwell Science Ltd
    BJOG 110 (2003), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To determine whether fetal response to needling resembles the fetal ‘brain sparing’ response seen with hypoxaemia.Design Prospective observational study.Setting Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, London.Population Eighty-five pregnant women undergoing invasive procedures associated with fetal prenatal diagnosis and/or management.Methods The femoral artery and the middle cerebral artery pulsatility index were measured by Doppler ultrasonography before and after 89 invasive procedures (fetal blood sampling, transfusion, bladder or cyst aspiration, shunt insertion and amniocentesis, between 17 and 36 weeks). Cases in which the fetal body was transgressed were compared with ‘control’ fetuses undergoing invasive procedures which did not directly involve needling the fetus (amniocentesis and placental cord insertion procedures).Main outcome measures Femoral artery and middle cerebral artery pulsatility index.Results The femoral artery pulsatility index rose after transgression [median change (Δ) 0.73; 95% confidence interval (CI) 0.51 to 0.98]. In contrast, there was no significant change in femoral artery pulsatility index after non-transgression procedures (mean Δ 0.28; 95% CI −0.20 to 0.76). Analysis confirmed the fall in middle cerebral artery pulsatility index after transgression procedures (median Δ−0.19; 95% CI −0.07 to −0.35), but there was also a significant fall in middle cerebral artery pulsatility index after non-transgression procedures (mean Δ−0.47; 95% CI −0.23 to −0.71).Conclusions The human fetus mounts a peripheral haemodynamic response to invasive procedures involving transgression of the fetal body, which is consistent with the brain sparing effect. However, the change in middle cerebral artery pulsatility index in both transgression and control procedures suggests that the changes and mechanisms may be more complex than previously thought.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.2003.02373.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Some effects of morphine and amphetamine on intellectual functions and mood (1964)
    Springer
    Psychopharmacology 6 (1964), S. 49-56 
    Details
    ISSN: 1432-2072
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Four groups of 15 undergraduate students received either 10 mg of d-amphetamine sulfate, 16 mg of morphine sulfate, a mixture of 16 mg of morphine sulfate and 10 mg of d-amphetamine sulfate, or a lactose placebo under double blind conditions. These subjects were given, both before and after the administration of the drugs, a series of tests utilizing the Guilford structure of intellect model, the Nowlis and Nowlis mood adjective check list, and the McClelland Need Achievement Scale. It was shown that certain tests were differentially effected by the drugs. Of particular interest was an enhancement by morphine of all tests which were based upon a logical judgment and selection of an answer among a limited number of alternatives. D-amphetamine was found to enhance the performance on scales different from those most enhanced by morphine. It was found that d-amphetamine enhanced the need to achieve and elevated the sense of activation of the subjects. These results were discussed in terms of possible theoretical consequences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00710914
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Configurational entropy of polyethylene and other linear polymers (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 869-880 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The configurational entropy of the polyethylene chain at the melting points calculated in two ways. In both calculations, tetrahedral angles and discrete trans and gauche arrangements of all bonds are assumed, and trans bonds are assumed more stable than gauche by energy U1. First, calculations are made on chains of up to N = 18 bonds, disallowing all configurations having overlapping atoms, and the result is extrapolated to large N. Second, a calculation is made directly for long chains, with overlaps excluded only over every short chain segment. The results are in almost exact agreement, suggesting that the second method can be safely used with other molecules. The calculated configurational entropy is in line with that suggested by the entropy of fusion, assuming the chains to acquire a configurational freedom in the melt which approaches that of independent chains.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040604
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