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  • Articles: DFG German National Licenses  (2)
  • 1985-1989  (2)
  • 1925-1929
  • Biochemistry and Biotechnology  (1)
  • transitive closure  (1)
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  • Articles: DFG German National Licenses  (2)
Material
Years
  • 1985-1989  (2)
  • 1925-1929
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Practical parallel Union-Find algorithms for transitive closure and clustering (1988)
    Springer
    International journal of parallel programming 17 (1988), S. 403-423 
    Details
    ISSN: 1573-7640
    Keywords: Parallel algorithms ; clustering ; transitive closure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Practical parallel algorithms, based on classical sequential Union-Find algorithms for computing transitive closures of binary relations, are described and implemented for both shared memory and distributed memory parallel computers. By practical algorithms, we mean algorithms that are efficient for parallel systems with bounded numbers of processors as opposed to algorithms where the number of processors grows with the problem size. Transitive closures are useful for decomposing many applications problems into independent subproblems. The implementations were on an ENCORE Multimax shared memory machine and an NCUBE hypercube. Our implementations indicate that transitive closure computations are intrinsically difficult for distributed memory parallel machines because of the need for global information. By contrast, our results for shared memory machines exhibited excellent speedups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01383882
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fractionation of Aspergillus niger cellulases by combined ion exchange affinity chromatography (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 29 (1987), S. 176-179 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Eight chemically modified cellulose supports were tested for their ability to absorb components of the Aspergillus niger cellulase system. At least two of the most effective adsorbents, aminoethyl cellulose and carboxymethyl cellulose, were shown to be useful for the fractionation of cellulases. These supports apparently owe their resolving capacity to both ion exchange and biospecific binding effects; however, the relative importance of each effect is unknown. These observations form the basis for a new cellulase fractionation technique, combined ion exchange-affinity chromatography.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260290206
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    Paper (German National Licenses)
    Fulltext
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