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  • Electronic Resource  (3)
  • Hair  (2)
  • Analytical Chemistry and Spectroscopy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Variables influencing cadmium concentrations in hair of pre-school children living in different areas of the Federal Republic of Germany (1988)
    Springer
    International archives of occupational and environmental health 60 (1988), S. 43-50 
    Details
    ISSN: 1432-1246
    Keywords: Cadmium ; Hair ; Pre-school children ; Variables
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influence of several factors on cadmium (Cd) concentrations in the hair of 474 pre-school children was examined. The study was performed in an industrial (Duisburg) and rural area (Westfalen) of the (FRG). Season, sex, hair color, and place of residence were found to be the main factors influencing Cd levels in hair. Concentrations of Cd in samples obtained during summer were on the average nearly twice as high as those sampled during winter (geometric means: 116.1 vs. 63.7ng/g). Boys had more Cd in their hair than girls (111.5 vs.74.0 ng/g). Cd levels in hair decreased from red to blond, to brown, and black hair. Children living in Duisburg had more Cd in their hair than those from rural areas (103.9 vs.77.Ong/g). Cd content in hair was inversely related to age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409378
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hair zinc of young children from rural and urban areas in North Rhine-Westphalia, Federal Republic of Germany (1988)
    Springer
    European journal of pediatrics 147 (1988), S. 179-183 
    Details
    ISSN: 1432-1076
    Keywords: Zinc ; Hair ; North Rhine-Westphalia ; Atomic absorption spectrophotometry ; Children
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Hair zinc levels were estimated by atomic absorption spectrophotometry in 474 children, aged 3–7 years, from 11 kindergartens in a highly industrialized and polluted area (Duisburg) and 8 kindergartens in a rural area of North Rhine-Westphalia. The mean hair zinc level amounted to 118 μg/g, increasing between the 4th and 7th year of life. At all ages the values from the urban toddlers were lower than from rural toddlers, and in both regions they were higher in winter than in summer. Children with frequent upper respiratory tract infections (〉6 infections/year) showed significantly lower zinc hair values, independent of their age. Low hair zinc values (below 70 μg/g) were frequently found, raising the question as to whether this is a normal, age-related phenomenon, or whether it indicates a suboptimal zinc status of young children from North Rhine-Westphalia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00442218
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of chemical-shift tensor orientations in methylene groups by separated-local-field NMR (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. 352-356 
    Details
    ISSN: 0749-1581
    Keywords: Separated-local-field NMR ; Chemical-shift tensor orientations ; Poly(ethylene oxide) ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 13C chemical-shift tensor orientations in the OCH2CH2O moieties of poly(ethylene oxide) (PEO) and poly(ethylene terephthalate) (PET) were determined by means of 1H—13C separated-local-field NMR spectroscopy, and the literature values for the shift tensors in polyethylene (PE) and polyoxymethylene (POM) were improved. An angular resolution of ± 4° was attained on standard equipment with 90° pulse lengths exceeding 4 μs. Relatively high uniformity of the methylene tensor orientations, complying with local molecular symmetry, was found.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260310408
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    Paper (German National Licenses)
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