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  • 11
    Electronic Resource
    Electronic Resource
    Social and physical health risk factors for first-onset major depressive disorder in a community sample (1994)
    Springer
    Social psychiatry and psychiatric epidemiology 29 (1994), S. 165-171 
    Details
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Using prospective data on 3,170 respondents aged 18 years and over who were at risk for a first-onset major depression from the New Haven site of the Epidemiologic Catchment Area (ECA) study, these analyses assessed the effects of social status, physical health status, and social isolation on first-onset depression in a 1-year. period, controlling for demographic characteristics and baseline psychiatric factors. Among the assessed potential risk factors, poverty status [odds ratio (OR=2.034,P〈0.05)] and confinement to a bed or chair (OR=4.015,P〈0.05) were independently associated with an increased risk for a first-onset depressiveepisode when controlling for gender, age, past history of substance abuse, and subclinical depressive symptoms. The effects of poverly, and to a lesser degree homebound status, were substantially reduced when controlling for degree of isolation from friends and family, suggesting that social isolation mediates some of the relationships between social and physical statuses and major depression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00802013
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  • 12
    Electronic Resource
    Electronic Resource
    Precision measurements of x-ray energies, natural widths and intensities in the actinide region (1982)
    Springer
    The European physical journal 308 (1982), S. 209-213 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A Dumond-type curved crystal spectrometer has been used to measureK x-ray energies, natural widths and relative intensities for the eleven actinides from88Ra to98Cf. The results are compared to the most recent theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01418282
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  • 13
    Electronic Resource
    Electronic Resource
    Airborne and lidar measurements of aerosol and cloud particles in the troposphere over Alert Canada in April 1986 (1989)
    Springer
    Journal of atmospheric chemistry 9 (1989), S. 187-211 
    Details
    ISSN: 1573-0662
    Keywords: aerosol size distribution ; aerosol particle profiles ; aerosol scattering ; Arctic haze ; ice crystals ; lidar ; ozone profiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract As a component of the Canadian Arctic Haze Study, held coincident with the second Arctic Gas and Aerosol Sampling Program (AGASP II), vertical profiles of aerosol size distribution (≥0.17 μm), light scattering parameters and cloud particle concentrations were obtained with an instrumented aircraft and ground-based lidar system during April 1986 at Alert. Northwest Territories. Average aerosol number concentrations range from about 200 cm−3 over the Arctic ice cap to about 100 cm−3 at 6 km. The aerosol size spectrum is virtually free of giant or coarse aerosol particles, and does not vary significantly with altitude. Most of the aerosol volume is concentrated in the 0.17–0.50 μm size range, and the aerosol number concentration is found to be a good surrogate for the SO4 = concentration of the Arctic haze aerosol. Comparison of the aircraft and lidar data show that, when iced crystal scattering is excluded, the aerosol light scattering coefficient and the lidar backscattering coefficient are proportional to the Arctic haze aerosol concentration. Ratios of scattering to backscattering, scattering to aerosol number concentration, and backscattering to aerosol number concentration are 15.3 steradians, 1.1×10−13 m2, and 4.8×10−15 m2 sr−1, respectively. Aerosol scattering coefficients calculated from the measured size distributions using Mie scattering agree well with measured values. The calculations indicate the aerosol absorption optical depth over 6 km to range between 0.011 and 0.018. The presence of small numbers of ice crystals (10–20 crystals 1−1 measured) increased light scattering by over a factor of ten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00052832
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  • 14
    Electronic Resource
    Electronic Resource
    Gross morphological changes in the salivary glands ofIxodes ricinus (Acari, Ixodidae) between bloodmeals in relation to active uptake of atmospheric water vapour (1990)
    Springer
    Experimental and applied acarology 9 (1990), S. 239-258 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The gross morphological changes in the salivary glands ofIxodes ricinus (L.) were investigated at the light microscopic level in various phases off the host with emphasis on the engorged nymph, in order to relate the capability of active vapour uptake in the course of postembryonal development to degeneration and regeneration of salivary-gland alveoli. Agranular alveoli in engorged immatures ofI. ricinus, from detachment to the following early pharate phase, do not appear different from those of the unfed instars. This is also true for the female up to approximately the end of oviposition. During moulting, the agranular alveoli of the immatures degenerate and new ones are formed which are apparently already functional in teneral nymphs and adults. In contrast, granular alveoli, much enlarged in freshly detached immatureI. ricinus, shrivel in the early post-repletion period and soon reach a highly reduced state which is maintained until apolysis. Subsequently, they disintegrate completely. The finding that engorged and detached immatures ofI. ricinus with markedly atrophied granular alveoli are capable of active vapour uptake until some days after initiation of apolysis suggests that only agranular alveoli are responsible for producing the primary secretion involved in vapour uptake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01193431
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  • 15
    Electronic Resource
    Electronic Resource
    Stress singularity in polyhedral corner points in the case of elastic different-modulus joints (2000)
    Springer
    Doklady physics 45 (2000), S. 37-41 
    Details
    ISSN: 1562-6903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.171701
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  • 16
    Electronic Resource
    Electronic Resource
    Äthylalkohol (1933)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 91 (1933), S. 214-217 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331464
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  • 17
    Electronic Resource
    Electronic Resource
    Kohlenwasserstoffe (1933)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 94 (1933), S. 361-365 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01352243
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  • 18
    Electronic Resource
    Electronic Resource
    Halogenverbindungen (1934)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 97 (1934), S. 293-294 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01747143
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  • 19
    Electronic Resource
    Electronic Resource
    A chemical study of thermally activated chromic titanate on silica ethylene polymerization catalysts (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 2857-2866 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thermally activated ethylene polymerization catalysts which contain chromium and titanium on silica differ from those catalysts which contain only chromium on silica. The characteristics of chromium-titanium catalysts vary with the method of incorporating the titanium and the thermal activation procedure. Titanated catalysts of the kind examined in this article have faster initiation and a higher polymerization rate per unit catalyst weight than corresponding catalysts without titanium. High-density polyethylene produced by this type of titanium-chromium catalyst tends to have a higher melt index and a broader molecular weight distribution than polyethylene made with chromium on silica catalysts. Iodometric titration showed that reduction from the initial hexavalent chromium to trivalent occurs when the dry, catalyst starting material is treated with titanium tetraisopropoxide. A study of the reaction between chromium trioxide and titanium tetraisopropoxide in carbon tetrachloride revealed that (1) it is not necessary to have a reaction between surface silanols and titanium tetraisopropoxide for the reduction to occur, and (2) the reaction product has an absorption near 660 nm in the visible range. Comparison of spectra showed that chromium trioxide on silica reduced by isopropyl alcohol has a shifted absorption, i.e., 600 nm. These findings are interpreted to mean that titanium atoms come sufficiently close to chromium atoms to change their electron density in the starting material and remain close neighbors in the activated catalysts. The interpretation is further supported by ESCA data and leads to the proposal that in this case the activated catalysts contain titanium chromate structures.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180908
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  • 20
    Electronic Resource
    Electronic Resource
    Prediction of molecular weight distribution of high-density polyethylene made in a continuous reactor from fixed ethylene concentration batch reactor data (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 17 (1973), S. 3003-3013 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The polydispersity index, Mw/Mn, of the product of an ideal continuous stirred tank reactor can be predicted from batch reactor data. A method for the prediction, in the case of high-density polyethylene synthesis, comes from finding the effect of catalyst age upon yield, Mw, and Mn in a batch reactor operated at constant pressure. These catalyst age effects are combined with the catalyst age distribution in the continuous reactor, and integration over all ages gives the yield and the polydispersity index for the continuous reactor product. This scheme for prediction was applied to a particular catalyst system, and the calculated values have been found to agree with observations.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1973.070171008
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