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  • Engineering General  (3)
  • Lens  (2)
  • nucleotide sequence  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Monkey erythropoietin gene: cloning, expression and comparison with the human erythropoietin gene
    Amsterdam : Elsevier
    Gene 44 (1986), S. 201-209 
    Details
    ISSN: 0378-1119
    Keywords: Recombinant DNA ; kidney cDNA library ; nucleotide sequence ; oligodeoxyribonucleotide probe ; signal peptide ; transfection
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(86)90183-6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nucleotide sequence of a rice genomic clone that encodes a class I endochitinase (1991)
    Springer
    Plant molecular biology 16 (1991), S. 479-480 
    Details
    ISSN: 1573-5028
    Keywords: endochitinase ; nucleotide sequence ; rice (Oryza sativa L. var. japonica)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023999
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure and distribution of gap junctions in lens epithelium and fiber cells (1986)
    Springer
    Cell & tissue research 244 (1986), S. 253-263 
    Details
    ISSN: 1432-0878
    Keywords: Gap junction ; Lens ; Epithelium ; Fiber cells ; Freeze-fracture ; Vertebrales
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We report a comparative study of gap junctions in lens epithelia of frog, rabbit, rat and human, using a “double mounting” method for freeze-fracture electron microscopy. The gap junctions on the narrow sides of hexagonal cortical fiber cells of various species were also studied with the same technique. Gap junctions were commonly present between epithelial cells of the entire undifferentiated epithelium, between fiber cells on both wide and narrow sides, and between epithelial cells and fiber cells. Structural diversity of gap junctions, based on connexon arrangements, was evident in lens epithelia among the four species studied. Gap junctions with random arrays of connexons were found predominantly in frog lens epithelium, while the crystalline and striated configurations were mainly observed in the epithelia of human and rat, and of rabbit, respectively. On the other hand, there was no structural variation of gap junctions observed on either wide or narrow sides of lens fiber cells from any species studied. Only the random-type gap junction was found. However, the distribution of gap junctions was unique on the narrow sides. There was a single row of junctional plaques along the middle of the narrow sides, whereas the wide sides showed an uneven distribution pattern. The gap junctions between epithelial cells and fiber cells had a random packing of connexons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219200
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Adherens junctions in the ocular lens of various species: ultrastructural analysis with an improved fixation (1988)
    Springer
    Cell & tissue research 254 (1988), S. 31-40 
    Details
    ISSN: 1432-0878
    Keywords: Adherens junctions ; Desmosomes ; Actin ; Vinculin ; Lens ; TEM ; Vertebrates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure and distribution of adherens junctions in the intact adult lens of human, chicken, dove, rat, and rainbow trout were studied with thin-section electron microscopy, using an improved fixation containing a mixture of glutaraldehyde, lysine, and tannic acid. The nature of adherens junctions in the fiber-cells of the lens was also verified by immunofluorescence and rhodamine-phalloidin labelings for vinculin and actin. Electron microscopy revealed that adherens junctions of the lens were different ultrastructurally from the desmosomes found only between the lateral epithelial cells of the lens. The adherens junctions had the same structural characteristics as the zonulae adherentes, except that they were macular contacts, not belts. However, cross bridges were evident within the interspace of the junctions. Adherens junctions were located between the fiber-cells, between the epithelial cells and fiber-cells, and between the epithelial cells. They had a characteristic distribution in the “intersections” where three hexagonal fiber-cells met, as seen in cross-sections in all species studied. In addition, adherens junctions and associated actin were found distributed randomly along the entire cell membranes of both wide and narrow sides of cortical fiber-cells in the human, chicken, and dove lenses which have good accomodating capability. However, in the poorly-accomodating lenses of rat and fish, these junctions were seen predominantly on the narrow sides and at the regions of the wide sides that were very close to the “intersections”. It is suggested that adherens junctions and associated actin microfilaments are involved in stabilizing the structural integrity of lens cells during accomodation and in preserving a specific lens shape.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220014
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  • 5
    Electronic Resource
    Electronic Resource
    Stability analysis of three-level difference schemes for initial-boundary problems for multidimensional convective-diffusion equations (1993)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 9 (1993), S. 595-605 
    Details
    ISSN: 1069-8299
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A systematic procedure is presented to derive stability conditions for leap-frog-type finite-difference schemes for the multidimensional constant-coefficient convective-diffusion equation. The treatise includes von Neumann stability analysis for pure initial-value problems and matrix stability analysis for Dirichlet boundary-value problems. Discrepancies on time-step restriction between von Neumann stability analysis and matrix stability analysis are observed.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1640090707
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Padé and upwinding finite difference schemes for the quantum mechanical equation of motion (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 7 (1991), S. 639-647 
    Details
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A systematic approach is presented to search for a two-level six-point finite difference of Padé type for the numerical solution of the quantum mechanical equation of motion. A family of second order accurate Pade schemes is obtained and the stability properties are analysed by the von Neumann and matrix methods. Also, a similar stability analysis is also performed for a family of two-level first order accurate upwinding difference schemes by the von Neumann and matrix methods. Discrepancies between the stability results obtained by the von Neumann and matrix methods are observed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1630070811
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  • 7
    Electronic Resource
    Electronic Resource
    Location and structure of the nearest singularity of a perturbation series (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 7 (1991), S. 19-28 
    Details
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The incompressible potential flow over a perturbed body is used as a model to shed light into the nature of the nearest singularity of a perturbation series. The solutions for various physical quantities are developed as a formal perturbation expansion in powers of a parameter up to 30 terms. The tedious computation is relegated to a computer. The calculations reveal that the location and structure of the nearest singularity of a pertubation series do change with the field point at the which the series is evaluated. Also the radius of convergence and behaviour of the perturbation series do depend significantly on the choice of the physical quantities. These results may provide salutary information for the analysis of computer extended pertubation series.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1630070104
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