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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 36 (1977), S. 1-7 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Because of its technical capabilities, its rapidity and its non-invasive nature, computed tomography (CT) has given a new scope to neurological diagnosis and to the understanding of various aspects of neurological science. The availability of this test is determined by the patient load. If precise clinical indications are not considered, patients requiring CT the most may be denied immediate examination because less urgent cases may be occupying valuable diagnostic time. Moreover, the test is relatively expensive for the individual patient and for the community; this presents another facet of its use that should be taken into account. The technical limitations and clinical priorities to be considered when a physician is entertaining this test for a patient have been outlined. The indications have been divided into absolute and relative, according to the degree of clinical urgency. As a result, a priority guideline for diagnostic CT has been provided.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We followed 153 head-injured patients by computed tomography and neurologic examinations. Twenty-seven also received psychologic evaluations. Cerebral parenchymal disruption was the abnormality produced by head trauma most likely to result in a fixed neurologic or psychologic deficit. Extracerebral hematomas and diffuse cerebral swelling were associated with deficits only if focal parenchymal damage was also present. Of the lesions encountered, midline hemorrhages, reflecting a diffuse shearing injury, were associated with the highest morbidity and mortality. The sites of residual parenchymal damage were associated more frequently with deficits found on psychologic testing than with neurologically detected deficits.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 16 (1978), S. 13-14 
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Computed tomography in 34 cases of meningitis has revealed a spectrum of findings. In acute cases these include enlargement of the subarachnoid spaces, generalized contrast enhancement of the meninges and ependyma, sterile and pyogenic subdural collections, cortical infarction, and cerebral necrosis.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Parieto-occipital interhemispheric acute subural hematomas (IASH) were found in 17 (61%) of 28 abused children examined by computed tomography, presenting with neurologic symptoms. CT demonstration of IASH correlated with injury due to severe shaking, the presence of retinal hemorrhages, and the absence of the stigmata of battering. Subsequent computed tomographic examination in these patients demonstrated infarction in 50%, and cerebral atrophy in 100%.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A review of sequential CT examinations on 87 acute nonpenetrating head injury patients with traumatic hemorrhagic lesions has revealed a difference in location and in time course for change in density and mass effect between intracerebral hematoma, hemorrhagic contusion, and diffuse white matter shearing injury.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 54 (1979), S. 41-47 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The gammaridean amphipods Cymadusa compta (Smith), Gammarus mucronatus Say, Melita nitida Smith and Grandidierella bonnieroides Stephensen from a seagrass community in the Indian River estuary of Florida (USA) fed variously upon large drift algae, small algae epiphytic on seagrasses and seagrass leaf debris and detritus. Consumption was measured in the laboratory using an index (CI) equivalent to mg ingested mg-1 amphipod day-1. Observations revealed that the amphipods fed by macrophagy, an attack upon large algae and seagrass debris, and by microphagy, small particle detritus feeding and scraping of plant surfaces for diatoms and other epiphytic algae. C. compta was a macrophagous feeder with a generalized diet of algae and seagrass debris, preferring epiphytic algae and drift algae at mean rates of 1.10 and 0.87 CI, respectively. Gammarus mucronatus fed upon epiphytes and seagrass debris equally at mean rates of 0.90 and 0.97 CI, respectively. The diet of M. nitida condisted primarily of epiphytes, consumed at an average rate of 1.05 CI. Grandidierella bonnieroides fed in a specialized microphagous manner, “grooming” plant surfaces for small particle detritus and diatoms at an approximate CI rate of 1.45. Assimilation of plants ingested, as reflected by carbon-14 uptake, varied similarly among the 4 amphipods. Epiphytic algae appeared to be most useful as food, providing means of 41 to 75% carbon-14 uptake as ingesta. Drift algae and seagrass debris were of less value, with means varying between 11 and 24 % of carbon-14 uptake by the amphipods. The data show a pattern of feeding which resembles resource partitioning of food both by size and kind. Other evidence, however, including population limitation by predators and an apparent overabundance of food, indicate that resource partitioning as seen may be an artifact, and one which has no co-evolutionary basis among the present species.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-1561
    Keywords: Diptera ; Culicidae ; Aëdes triseriatus ; Cladophorales ; Cladophoraceae ; Cladophora glomerata ; fatty acid mosquito larvicides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The activity of a methanol extract residue fromCladophora glomerata against larvae ofAedes triseriatus is confirmed. Fractionation of this residue by solubility in solvents of varying polarity is monitored by bioassay withA. triseriatus larvae. The presence of fatty acids in the active hexane soluble fraction and saponified material obtained therefrom is indicated by1H NMR and IR. The identification of the individual fatty acids is achieved by co-injection and mass GLC of their methyl esters. Saturated and unsaturated fatty acids are screened against larvae and the LD50 values of the most active acids are determined. The LD50 of capric [10∶0], lauric [12∶0], myristic [14∶0] and palmitoleic [16∶1 (9c)] are 14,7, 4 and 3ppm respectively. The most active acids 12∶0, 14∶0 and 16∶1 (9c) are present in all the fractions examined and are released to water by the powdered alga at pH 8.5.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 19 (1975), S. 1373-1379 
    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: An apparatus is devised for measuring the real and imaginary components of the piezoelectric strain constant d = d′ - id″ for polymer films with a d.c. bias field. Electric fieldinduced piezoelectricity is observed for films of several types of polymer. The ratio of the piezoelectric constant to the d.c. bias field gives (∊ + κ)/G where ∊ is the dielectric constant, κ is the electrostriction constant, and G is the elastic constant. The temperature dependence of the field-induced piezoelectricity gives, therefore, combined information of dielectric and elastic properties of polymers. After heating to about 95°C followed by cooling to room temperature, maintaining a constant d.c. basis on a poly(vinyl chloride) film, piezoelectricity is observed at null d.c. field, which suggests the introduction of a residual polarization in the films.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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