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  • 2000-2004  (3)
  • 1965-1969  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 37 (1965), S. 428-429 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 1535-1545 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Fourier transform spectroscopy and intracavity laser absorption spectroscopy are used to record the absorption spectrum of formic acid at high spectral resolution, in the ranges of the 2νOH (6968.258 cm−1) and 4νOH (13 284.075 cm−1) vibrational bands of the trans-rotamer, respectively. Numerous perturbations combined with a large line density limit the extent to which the vibration–rotation analysis is performed. Some 689 lines are assigned in the first overtone band and related vibration–rotation constants are determined. Only the band origin and upper state principal A-rotational constant are determined for the n=4 overtone band, because of much higher spectral density. Interpolation, helped by literature data, provides all missing principal rotational constants in the nOH series, for n=1 to 4. All major vibration–rotation parameters appear to evolve very smoothly along the series. This trend is fully supported by ab initio calculations performed at the MP2/cc-pVTZ level of theory and based on an effective one-dimensional model describing the OH local mode stretching vibration. Results of these calculations are detailed in terms of the mean nuclear structure in the excitation series, up to n=4. The related calculated dipole moment surface allows the experimental a:b subband intensity ratio in the series to be interpreted in terms of a decrease in the HOC angle, from Θ(approximate)90° (n=1) to 44°(n=4). The potential occurrence of a proton exchange mechanism between the two oxygen nuclei, close to a tautomerism mechanism, is discussed. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical documentation 7 (1967), S. 9-14 
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science, Ltd
    European journal of neuroscience 15 (2002), S. 0 
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Signalling through tyrosine kinase receptor B (trkB) influences neuronal survival, differentiation and synaptogenesis. trkB exists in a full-length form (trkBTK+), which contains a catalytic tyrosine kinase (TK) domain, and a truncated form (trkBTK–), which lacks this domain. In the rodent brain, expression of trkBTK+ decreases and trkBTK– increases during postnatal life. We hypothesized that both forms of trkB receptor mRNA would be present in the human neocortex and that the developmental profile of trkB gene expression in human may be distinct from that in rodent. We detected both trkBTK+ and trkBTK– mRNA in RNA extracted from multiple human brain regions by Northern blot. Using in situ hybridization, we found trkBTK+ mRNA in all cortical layers, with highest expression in layer IV and intermediate-to-high expression in layers III and V of the human dorsolateral prefrontal cortex. trkBTK+ mRNA was present in neurons with both pyramidal and nonpyramidal shapes in the dorsolateral prefrontal cortex. trkBTK+ mRNA levels were significantly increased in layer III in young adults as compared with infants and the elderly. In the elderly, trkBTK+ mRNA levels were reduced markedly in all cortical layers. Unlike the mRNA encoding the full-length form of trkB, trkBTK– mRNA was distributed homogeneously across the grey matter, and trkBTK– mRNA levels increased only slightly during postnatal life. The results suggest that neurons in the human dorsolateral prefrontal cortex are responsive to neurotrophins throughout postnatal life and that this responsiveness may be modulated during the human lifespan.
    Type of Medium: Electronic Resource
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  • 5
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    Unknown
    Baltimore : Periodicals Archive Online (PAO)
    Human Biology. 39:3 (1967:Sept.) 284 
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 229 (1967), S. 7-19 
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Haut von Kindern verschiedenen Alters wurde chemisch untersucht. Es wurde der Gehalt an Wasser, fettfreier Trockensubstanz, Gesamtstickstoff, Oxyprolin, Hexosamin, Asche, Calcium, Magnesium, Phosphorsäure, Eisen und Kupfer bestimmt. Es zeigte sich, daß sich der Gehalt an einigen dieser Komponenten mit dem Heranwachsen der Kinder auf charakteristische Weise ändert. Die Ergebnisse dieser Untersuchungen werden mit von anderen Autoren veröffentlichten Resultaten verglichen.
    Notes: Summary Samples of skin from children of different age were analysed by chemical methods. The content of water, fatfree dry residue, total nitrogen, hydroxyproline, hexosamine, total minerals, calcium, magnesium, phosphate, iron and copper were determined. It was found that the degree of hydratisation is highest in the skin of babies; it diminishes quickly during the first year of life and much more slowly till the age of about five years. Nitrogen content increases slowly with age and in the skin of young children a quickly increasing percentage of the total nitrogen is collagen nitrogen. Mineral content, particularly phosphorus and magnesium content, are much higher in the skin of babies than in that of older children. Results of our analyses differ in several respects from those of other authors. They seem to indicate that the chemical composition of children's skin undergoes changes which to the greatest part take place during the first year, but continue for several years.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 243 (2000), S. 227-233 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Nuclear data are numerical quantities that describe nuclear properties and nuclear interactions. Arranged into data libraries, they ultimately constitute the very basis of all nuclear applications. Nuclear data have to be measured, compiled, evaluated and validated so that users get the best and up-to-date information in an unrestricted manner. The paper provides an insight into this activity, describes the process from measurements to nuclear data services, illustrates key applications, and discusses future trends and developments.
    Type of Medium: Electronic Resource
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