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  • 70B10  (2)
  • autoclaving  (1)
  • 1990-1994  (3)
  • 1920-1924
  • 1
    Electronic Resource
    Electronic Resource
    The fractionation of cell components in Oscillatoria agardhii: an audit of procedures (1993)
    Springer
    Hydrobiologia 268 (1993), S. 163-168 
    Details
    ISSN: 1573-5117
    Keywords: cyanophyte ; carbon partitioning ; lipid ; carbohydrate ; protein ; centrifugation ; autoclaving ; L:D cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Carbon partitioning techniques for the separation of physiologically important macromolecules (lipid, carbohydrate and protein) need to be efficient if they are to yield meaningful estimates of carbon flow in macromolecular synthesis, as measured by [14C] bicarbonate incorporation techniques. However, the efficiency of partitioning is rarely checked. Using existing methods, we found highly variable extraction efficiency of these macromolecules particularly of carbohydrate from cells grown under light:dark regimes. We report on a highly reproducible modification to existing methods which involves autoclaving with 5% trichloroacetic acid and centrifugation to separate carbohydrate and protein fractions. The presence of a structural non-extractable carbohydrate pool is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014051
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    First-order invariants of Euclidean motions (1991)
    Springer
    Acta applicandae mathematicae 24 (1991), S. 233-251 
    Details
    ISSN: 1572-9036
    Keywords: 70B10 ; Kinematics ; invariants ; screws
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Let E(n) be the lie group of proper rigid motions of Euclidean n-space. The paper is concerned with the adjoint action of E(n) on its Lie algebra e(n), and the induced action on the Grassmannian of subspaces of e(n) of a given dimension. For the adjoint action, the authors list explicit generators for the ring of invariant polynomials. In the case n=3, of greatest physical interest, explicit finite invariant stratifications are given for the Grassmannians, providing a formal listing of the screw-systems familiar in theoretical kinematics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00047045
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  • 3
    Electronic Resource
    Electronic Resource
    On the Hierarchy of screw systems (1993)
    Springer
    Acta applicandae mathematicae 32 (1993), S. 267-296 
    Details
    ISSN: 1572-9036
    Keywords: 70B10 ; Screw ; kinematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract LetE(3) be the Lie group of proper rigid motions of Euclidean 3-space. The adjoint action ofE(3) on its Lie algebrae(3) induces an action on the Grassmannian of subspaces of given dimensiond. Projectively, these subspaces are the screw systems of classical kinematics. The authors show that existing classifications of screw systems give rise to Whitney regular stratifications of the Grassmannians, and establish diagrams of specialisations for the strata. A list is given of the screw systems which can appear generically for motions of 3-space with at most three degrees of freedom.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082452
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