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  • 1
    Electronic Resource
    Electronic Resource
    Atomic Force Microscopy Study of Ceramic Powder Compacts during Drying (1998)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 81 (1998), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Atomic force microscopy (AFM) was used to image the surface of ceramic powder compacts that contained polymer and solvent during drying. Topographical information was continuously collected as a function of drying time. Surface changes were directly observed during imaging. Surface crystals appeared on damp zirconia sheets after drying, subsequently contributing to secondary flaws in the form of holes in fired ceramic products. In cases where few surface crystals were observed in the green stage, fine grain size and high strength were observed after firing. The fired material was viewed via AFM and shown to be directly related to the drying process that was observed earlier.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1998.tb02372.x
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  • 2
    Electronic Resource
    Electronic Resource
    Picking the combination (1995)
    [s.l.] : Nature Publishing Group
    Nature 377 (1995), S. 270-271 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Applied Composite Materials: An International Journal for the Science and Application of Composite Materials. Editor-in-chief Peter W. R. Beaumont. Kluwer. 6/yr. Dfl406, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/377270b0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrocarbon fuels Hopes for a flame-free future (2000)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 404 (2000), S. 233-235 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] What fuel will drive the coming century? As we look back over the past millennium, the progression of fuel usage has been from wood to coal to oil. Now, at the turn of the millennium, methane gas appears to be the preferred clean fuel of the major electricity generators. But we are moving ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35005191
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of a DNA sequence associated with plasmid integration in Streptomyces coelicolor A3(2) (1986)
    Springer
    Molecular genetics and genomics 202 (1986), S. 240-245 
    Details
    ISSN: 1617-4623
    Keywords: Insertion sequence ; Agarase gene ; SCP1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We identified a DNA element of length about 1 kb that is present in two copies in the chromosome of Streptomyces coelicolor A3(2) and is also present on the plasmid SCP1 which has been carefully defined genetically, but never isolated as extrachromosomal DNA. A copy of the element is close (within 5 kb) of a gene coding for an extracellular agarase in the chromosome of S. coelicolor A3(2) and in an NF strain, in which SCP1 has integrated into the chromosome, the agarase gene has been deleted. The element has properties reminiscent of Insertion Sequences in Escherichia coli, but it is not yet know if it can transpose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331643
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  • 5
    Electronic Resource
    Electronic Resource
    Identification and characterization of a locus inhibiting extrachromosomal maintenance of theStreptomyces plasmid SLP1 (1989)
    Springer
    Molecular genetics and genomics 217 (1989), S. 324-331 
    Details
    ISSN: 1617-4623
    Keywords: Plasmid replication ; Incompatibility ; Helix-turn-helix motifs ; Superinfection immunity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We report here the existence and initial characterization of a genetic locus (imp) that inhibits maintenance of SLP1-derived plasmids as extrachromosomal replicons in a manner distinct from normal incompatibility between autonomous SLP1 replicons. Thetrans-actingimp function has been localized to a 1.8 kbEco47III restriction fragment present on integrated SLP1 elements. At least part of this DNA segment is absent from SLP1-derived plasmids. DNA sequence analysis of theimp region indicates that it contains three overlapping open reading frames (ORFs) that may constitute a polycistronic operon. The effects of insertions within theimp region indicate that uninterrupted transcription through all three ORFs is necessary forimp activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02464900
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  • 6
    Electronic Resource
    Electronic Resource
    Differences in the development of jejunum and ileum as observed in fetal rat intestinal isografts. Possible implications related to the villus size gradient (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    American Journal of Anatomy 158 (1980), S. 211-215 
    Details
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Previous studies have shown that villus size in the small intestine decreases from the duodenum toward the ileum. Villus-enlarging and villus-reducing factors have been found in the gastric, pancreatic, and duodenal secretions, and in bile (Altmann and Leblond, ′70; Altmann, ′74). We here explore the role of intrinsic factors present in the individual sections of the small intestine by following the development of villus height in fetal (21-day old) jejunal and ileal segments implanted under the kidney capsule of syngeneic adult rats. Twenty-eight and 45 days after implantation, the jejunal villi contained significantly more columnar epithelial cells than did the ileal villi, but the jejunoileal gradient was even greater in small intestine of corresponding ages, developing in situ. Our experiments, thus, show that the jejunoileal gradient is already programmed in rats 1 day before birth, while other factors contribute postnatally to regulation of its magnitude.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aja.1001580209
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