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  • 1990-1994  (7)
  • 1992  (7)
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  • 1990-1994  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    The effect of intrauterine growth retardation on the development of renal nephrons (1992)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 99 (1992), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To investigate the effect of Type II (asymmetrical) intrauterine growth retardation (IUGR) on renal development.Design A prospective descriptive study.Setting Department of Fetal and Infant Pathology, Liverpool Children's Hospital.Subjects Six (severely) affected IUGR stillbirths of known gestational age with a control group of stillbirths with birthweight 〉 10th centile, and eight liveborn IUGR infants who died within a year of birth with a control group of appropriately grown infants who died within a year of birth (postnatal groups).Techniques The kidneys from all the groups studied were analysed using unbiased, reproducible and objective design-based stereological techniques.Main outcome measures Total renal nephron (glomerular) numbers and average volumes of total nephron and cortical and medullary nephron segments.Results Nephron number estimates lay below the control group's 5% prediction limit in five out of the six growth-retarded stillbirths, and were significantly (P〈0.005, IUGR at 65% of the control mean) reduced in the postnatal group. Estimates of nephron (segment) volume did not differ between control and IUGR groups.Conclusions Type II intrauterine growth retardation may exert a profound effect on renal development. The reduced nephron number at birth, together with the lack of any early postnatal compensation in either nephron number or nephron size, emphasizes the need for vigorous antenatal surveillance for IUGR and consideration of elective preterm delivery of affected fetuses. A systematic review of other organs, which develop in a similarly rapid fashion during the late intrauterine period, is indicated by this work. With one exception, all birthweights in the growth-retarded groups were below the third centile, thus the precise quantitative relation between progressive IUGR and renal function requires further assessment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1992.tb13726.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Computer storage and retrieval of generic chemical structures in patents. 14. Fragment generation from generic structures (1992)
    s.l. : American Chemical Society
    Journal of chemical information and modeling 32 (1992), S. 453-462 
    Details
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ci00009a010
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Automatic interpretation of the texts of chemical patent abstracts. 1. Lexical analysis and categorization (1992)
    s.l. : American Chemical Society
    Journal of chemical information and modeling 32 (1992), S. 463-467 
    Details
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ci00009a011
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Automatic interpretation of the texts of chemical patent abstracts. 2. Processing and results (1992)
    s.l. : American Chemical Society
    Journal of chemical information and modeling 32 (1992), S. 468-473 
    Details
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ci00009a012
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    FFT-based digital tactile vocoder system for real-time use (1992)
    Springer
    Medical & biological engineering & computing 30 (1992), S. 213-218 
    Details
    ISSN: 1741-0444
    Keywords: FFT ; Hearing prosthesis ; Speech processors ; Tactile aids ; Vocoders
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A microprocessor-based real-time digital vibrotactile vocoder system has been developed to train the deaf and for artificial hearing research. The system is composed of a microcomputer module with a digital signal processor interface units and an attenuator/driver circuit. Live or digitised (stored or synthetic) speech is presented to the skin spectrally through a belt housing eight or 16 vibrators. Speech is processed in real time using a fast Fourier transform. The system is also capable of presenting any arbitrary spatiotemporal pattern on the skin for artificial hearing experiments. A preliminary experiment with a deaf subject indicates that the system is potentially an effective device for artificial hearing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02446132
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  • 6
    Electronic Resource
    Electronic Resource
    DSC analysis of fusion level of rigid PVC revisited: Filler effects on thermal analysis data (1992)
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 14 (1992), S. 156-160 
    Details
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A DSC method for assessing degree of fusion of rigid PVC compounds has been improved, so as to make the technique more precise and objective. Analysis of conventional pipe samples provides assessments of gelation level that accord with solvent resistance and practical experience. However, thermal analysis techniques prove to be unreliable for compounds that contain no filler or more than about 13% filler. At least about 1% filler appears to be necessary for the phenomena that are the basis of this technique. Filler may affect crystallization of PVC compounds.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/vnl.730140309
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of compounding and extrusion variables on degree of fusion and impact strength of PVC window profile (1992)
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 14 (1992), S. 43-46 
    Details
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effects of temperature in twin screw extrusion of a window profile compound have been studied. Compounds were made with and without an acrylic impact modifier. Fusion levels of the extruded profiles were rated from values of the rubbery plateau modulus at temperatures near 110°C. Impact strength was measured at room temperature using notched tensile specimens at 1 m/s jaw separation rate. The impact strength of these materials does not increase with fusion level once an adequate degree of gelation has been achieved. The impact-modified compound shows a dramatic improvement in impact strength when the melt temperature was increased from 319°F to 343°F. A further increase to 365°F had no effect. The compound without impact modifier exhibited no improvements in impact strength over the whole extrusion temperature range. Conflicting reports in the literature on effects of fusion level on impact strength of PVC articles probably reflect different interactions between extrusion conditions and compound composition.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/vnl.730140111
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    Paper (German National Licenses)
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