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  • 1
    Electronic Resource
    Electronic Resource
    Fabrication and characterization of a new class of microelectrode arrays exhibiting steady-state current behavior (1993)
    s.l. : American Chemical Society
    Analytical chemistry 65 (1993), S. 1643-1646 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00059a027
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  • 2
    Electronic Resource
    Electronic Resource
    Nature and Stability of Mercury Thin Films on Glassy Carbon Electrodes under Fast-Scan Anodic Stripping Voltammetry (1994)
    s.l. : American Chemical Society
    Analytical chemistry 66 (1994), S. 3151-3157 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00091a025
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  • 3
    Electronic Resource
    Electronic Resource
    Repulsive binary alloys and the absence of localization: Application to Fibonacci lattices and molecularly based electronic filters (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 7369-7373 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We show here that a static disordered binary alloy in which one of the impurities is prevented from clustering in the lattice as a result of strong repulsive interactions, e.g., will possess a localization–delocalization transition regardless of the spatial dimension. We show explicitly that (N)1/2 of the electronic states are completely unscattered by the disorder and lead to superdiffusive transport with a mean-square displacement growing in time as t3/2 over a wide range of the static disorder in one dimension. The model is shown to be applicable to electron transport in Fibonacci lattices fabricated from two kinds of materials such as GaAs and AlAs. It is shown explicitly that transient grating experiments can be used to probe the location of the unattenuated states in the energy band. We propose that this model can be used to design molecularly based electronic filters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459411
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  • 4
    Electronic Resource
    Electronic Resource
    Tracer impurity diffusion in amorphous NixZr1−x alloys (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 2619-2621 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Impurity tracer diffusion coefficients for Co and Hf were measured in a series of amorphous NixZr1−x alloys at various temperatures for 0.3〈x〈0.7. The diffusion coefficients for Co, an impurity with small atomic radius were, depending on alloy composition and temperature, two to four orders of magnitude larger than those for Hf, an impurity with large atomic radius. Whereas the Hf tracer diffusion coefficients are independent of alloy composition, those of Co decrease strongly with increasing Ni concentration. These results suggest that the diffusion mechanisms for atoms with small or large atomic radii are different in amorphous Ni-Zr alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102855
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  • 5
    Electronic Resource
    Electronic Resource
    Poly(silaethylene): A Novel Analog of Polyethylene (1994)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 12085-12086 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00105a072
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  • 6
    Electronic Resource
    Electronic Resource
    Scanning electron microscopic analysis of annulus microstructure in otolith of European eel, Anguilla anguilla (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 45 (1994), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: To validate the yearly periodicity of annulus formation in the otolith of the eel, the structure of annuli in otoliths of the European eel, Anguilla anguilla, stocked for 7 and 12 years in Lake Ommen on the east coast of southern Sweden, was examined. The population was stocked from elvers imported both from France (Bay of Biscay) in April 1979 and England (River Severn) in March–April 1984. The microstructure of an annulus consisted of single, double and/or composite tings depending on the location in the otolith. The counts of annuli in otoliths of these eels were approximately consistent with the expected age. However, supernumerary false annuli and/or annulus underestimation frequently occurred. The methodology for annulus discrimination with light and scanning electron microscopes is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1994.tb01330.x
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular replacement real-space averaging (1992)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 25 (1992), S. 166-180 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Structure determination of macromolecules often depends on phase improvement and phase extension by use of real-space averaging of electron density related by noncrystallographic symmetry. Although techniques for such procedures have been described previously [Bricogne (1976). Acta Cryst. A32, 832–847; Johnson (1978). Acta Cryst. B34, 576–577], modern computer architecture and experience with these methods have suggested changes and improvements. Two unit cells are considered: (1) the p-cell corresponding to the actual crystal structure(s) being determined (there would be more than one of these if the molecule crystallizes in more than one crystal form) and (2) the h-cell corresponding to the molecule in a standard orientation with respect to which the molecular symmetry axes are defined. Averaging can proceed entirely within the p-cell, referring to the h-cell only in as far as knowledge of the molecular symmetry is required. It is also possible to place the averaged molecule back into the h-cell, where it can be used to redefine the molecular envelope or for displaying a suitably chosen asymmetric unit of the molecule. Techniques are discussed for automatically selecting a molecular envelope which is consistent with packing considerations within the p-cell and which retains the symmetry of the molecular point group. The electron density map to be averaged is divided into bricks for storage in virtual memory. Roughly as many bricks as there are noncrystallographic asymmetric units per crystallographic asymmetric unit need to be retained in memory at one time. This procedure minimizes paging problems and avoids double sorting. Use of eight-point interpolation permits storing the map at grid points separated by no more than 1/2.5 of the resolution limit to obtain rapid convergence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S002188989101141X
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  • 8
    Electronic Resource
    Electronic Resource
    Structure determination of monoclinic canine parvovirus (1992)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 48 (1992), S. 75-88 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768191009539
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  • 9
    Electronic Resource
    Electronic Resource
    Determination and refinement of the canine parvovirus empty-capsid structure (1993)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 572-579 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The canine parvovirus (CPV) empty-capsid structure has been determined and refined to 3.0 Å resolution in the tetragonal space group P43212 with cell dimensions a = b = 254.5 and c = 795.0 Å. The successful structure determination shows that reasonably good diffraction data were obtained in spite of the very long c axis. The structure was solved by molecular replacement using the electron density of CPV full particles in a monoclinic space group. The phases were refined by non-crystallographic symmetry averaging. The structure refinement was carried out by using the programs PROLSQ and X-PLOR. The final R factor for the structure that included 85 water molecules per icosahedral asymmetric unit was 21.1% for reflections between 6.0 and 3.0 Å resolution with an r.m.s. deviation of bond lengths of 0.020 Å from ideal values. The structure of CPV empty capsids showed conformational differences with respect to full capsids at a region where icosahedrally ordered DNA in full particles interacts with the capsid protein. It also confirmed the absence of density along the fivefold axis in the CPV empty-particle structure in contrast to the situation in CPV full particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444993006870
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  • 10
    Electronic Resource
    Electronic Resource
    Somatic Hypermutations in the Immunoglobulin Genes of Two New Human Lymphoma Lines of Lymphatic Follicle Origin (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 39 (1994), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Variable immunoglobulin heavy-chain regions (VDJ) of two newly established human lymphoma cell lines (HF-1 and HF-4) were sequenced. The most homologous germline VH gene found for both the HF-1 and HF-4 sequences was VH26 of the VH3a (V gene) family (82% and 91 % homologies, respectively). The JH region of the HF-4 heavy-chain sequence contained two nucleotide differences compared to the published germline JH3 gene. The DHJH region of the HF-1 gene had a record high number (20%) of somatic mutations.The numerous hypermutations found in the HF-1 cell line support the hypothesis that in some human follicular lymphomas, mutations continue to accumulate in immunoglobulin genes during the malignant growth. Follicular lymphoma cell lines, which have an active mutational machinery, in future may help to solve the molecular events behind the somatic hypermutations modifying immunoglobulin genes of B lymphocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1994.tb03374.x
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