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  • 1
    Electronic Resource
    Electronic Resource
    Relaxational behavior of birefringence of aqueous carboxymethylcellulose under an alternating electric field at frequencies ranging from 0.1 Hz to 100 kHz (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 20-26 
    Details
    ISSN: 1435-1536
    Keywords: Carboxymethylcellulose ; electric birefringence ; optical anisotropy ; relaxation ; cluster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The d. c. component of birefringence of aqueous carboxymethylcellulose (CMC) under an a. c. electric field was measured at frequencies ranging from 0.1 Hz to 100 kHz. Three samples of different molecular weights were studied with varying degree of neutralization, polymer concentration and added salt concentration. The dispersion curve of birefringence consists of three relaxation bands,A, B andC in order of decreasing frequency. RelaxationB with a negative relaxation strength is ascribed to end-over-end rotation of almost rodlike CMC molecules. RelaxationA with a positive strength is attributed to the relaxation of electrical polarizability along the minor axis of molecule. RelaxationC possesses also a positive strength and is induced by clusters of CMC molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01447671
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  • 2
    Electronic Resource
    Electronic Resource
    Scoliosis evaluation utilising truncal cross-sections (1982)
    Springer
    Medical & biological engineering & computing 20 (1982), S. 181-186 
    Details
    ISSN: 1741-0444
    Keywords: Deformity index ; Scoliosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract In scoliosis, two basic structural changes, i.e. lateral flexion and axial rotation, result in the characteristic spinal deformity. Radiography has proved satisfactory in measuring the lateral flexion deformity. However, at present there is no satisfactory method to measure the rotational deformity. A method to measure the latter deformity by drawing out cross-sections of the trunk has been developed: the projection of a horizontal laser beam on the body surface is detected by an inclined line sensor camera. The laser and line sensor camera are simultanelously moved around the patient and the camera output data are converted, by a minicomputer, into the cross-section on a graphic display or an x-y plotter. To evaluate the deformity of the cross-sections quantitatively, we introduced deformity indices and proposed algorithms for their calculation. Measuring crosssections of 59 scoliosis patients, we analysed the relationship between the deformity indices and the Cobb angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441353
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    12-Molybdophosphoric acid as starting material for Ni−Mo/Al2O3 hydrodesulfurization catalysts (1983)
    Springer
    Reaction kinetics and catalysis letters 22 (1983), S. 417-420 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract 12-Молибдофосфорная кислота была испро бована в качестве исходного вещества при получении HDS катализаторов NiO−MoO3/Al2O3, а также зффект присоединения фосфорной кислоты. Оптимальная активность достигается при низком содержании NiO, что свидетельству ет об эффективном образовании Ni−Mo взаимодействуюших частиц, при присоединении Р.
    Notes: Abstract 12-Molybdophosphoric acid was examined as starting material for NiO−MoO3/Al2O3 HDS catalysts as well as the addition effect of phosphoric acid. Optimum activities were found to be attained at a lower NiO content, suggesting the effective formation of Ni−Mo interaction species on the addition of P.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02066214
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    Paper (German National Licenses)
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