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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical endoscopy and other interventional techniques 6 (1992), S. 197-198 
    ISSN: 1432-2218
    Keywords: Laparoscopic cholecystectomy ; new Ushaped retractor ; Clear field
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A clear field of vision during laparoscopic cholecystectomy was attained by using a newly designed retractor which elevates the abdominal wall and does not require high-pressure CO2 infusion into the peritoneal cavity. As the abdominal cavity is continuously ventilated, smoke from the cauterization is suctioned off through openings in the middle part of the retractor. There is no interference with placement of ports.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 27 (1987), S. 470-482 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: A computer modeling concept was developed to deal with multicomponent emulsion copolymerization systems. Based on the model, a simulating program called NSBEC (n-component, semibatch emulsion copolymerization) was prepared., NSBEC is capable of carrying out a variety of operations involving any number of monomers with different modes of ingredient feed. In this paper, first the basic concept of the model is explained, then several applications to the actual experimental systems (e.g., acrylonitrile-vinylidene chloride, vinyl acetate-butyl acrylate, and methyl methacrylate-butyl acrylate) are discussed. Finally, the probable control of copolymer composition by means of the semibatch operation based on NSBEC is proposed. The authors expect that use of NSBEC can substantially reduce the number of experimental runs previously required to describe the system.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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