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  • 1
    Electronic Resource
    Electronic Resource
    Contribution to the surgical treatment of acute supratentorial subdural haematomas (1978)
    Springer
    Acta neurochirurgica 41 (1978), S. 349-353 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Acute traumatic subdural haematoma suspected of extending over an entire hemisphere must be treated with all speed. To obviate unnecessary skin incisions and subsequent craniectomies and craniotomies during the operation, we think it advantageous to plan a series of burrholes at set points in order to: a) begin to clear the haematoma; b) assess its extent and possible origin; c) decide whether a hemicranial or smaller craniotomy is called for.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01811347
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of Epitaxial Layer Growth Parameters on the Defect Density and on the Electrical Characteristics of Schottky Diodes (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 483-485 (May 2005), p. 429-432 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The effects of the Si/H2 ratio on the growth of the epitaxial layer and on the epitaxialdefects was studied in detail. A large increase of the growth rate has been observed with the increase of the silicon flux in the CVD reactor. Close to a Si/H2 ratio of 0.05 % silicon nucleation in the gas phase occurs producing a great amount of silicon particles that precipitate on the wafers. The epitaxial layers grown with a Si/H2 ratio of 0.03% show a low defect density and a low leakage current of the Schottky diodes realized on these wafers. For these diodes the DLTS spectra show thepresence of several peaks at 0.14, 0.75, 1.36 and 1.43 eV. For epitaxial layers grown with higher values of the Si/H2 ratio and then with an higher growth rate, the leakage current of the Schottky diodes increases considerably
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/10/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.483-485.429.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    New Achievements on CVD Based Methods for SiC Epitaxial Growth (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 483-485 (May 2005), p. 67-72 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The results of a new epitaxial process using an industrial 6x2” wafer reactor with the introduction of HCl during the growth have been reported. A complete reduction of silicon nucleation in the gas phase has been observed even for high silicon dilution parameters (Si/H2〉0.05) and an increase of the growth rate until about 20 µm/h has been measured. No difference has been observed in terms of defects, doping uniformity (average maximum variation 8%) and thickness uniformity (average maximum variation 1.2 %) with respect to the standardprocess without HCl
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/10/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.483-485.67.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Nuclear matrix-bound replicational sites detected in situ by 5-bromodeoxyuridine (1992)
    Springer
    Histochemistry and cell biology 98 (1992), S. 19-32 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The nuclear matrix was prepared in situ from Swiss 3T3 cells, which were synchronized by contact inhibition and serum starvation and pulse-labelled for very short periods of time with 5-bromodeoxyuridine (5-BrdU). For the first time 5-BrdU has been employed to demonstrate the association of newly synthesized DNA with a nucleoskeleton. Immunofluorescence analysis using a monoclonal antibody to 5-BrdU revealed five different intranuclear staining patterns at different stages of the S phase. These patterns were observed also in intact cells and did not change during the matrix preparation steps which involve extraction with 2M NaCl and DNase I digestion. Such an observation was also confirmed by spatial confocal microscopy studies. The intensity of lfuorescence, which was evaluated by cytofluorometry, increased to reach a maximum during mid-S phase and then decreased. Because no significant difference was found in the time to label residual DNA of different 5-BrdU staining patterns, this strongly suggests that a different number of replicons is activated at different stages of the S phase. These results strengthen the hypothesis that eukaryotic DNA replication occurs in close association with an insoluble protein nuclear skeleton, which determines the three-dimensional spatial organization of chromosome duplication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716934
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  • 5
    Electronic Resource
    Electronic Resource
    Immunocytochemical evaluation of protein kinase C translocation to the inner nuclear matrix in 3T3 mouse fibroblasts after IGF-I treatment (1995)
    Springer
    Histochemistry and cell biology 103 (1995), S. 447-457 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The complex pathway which links the agonist-cell membrane receptor binding to the response at the genome level involves, among other elements, protein kinase C (PKC). Agonists acting at the cell membrane can affect an autonomous nuclear polyphosphoinositide signaling system inducing an activation of nuclear phosphoinositidase activity and a subsequent translocation of PKC to the nuclear region. The fine localization of PKC has been investigated by means of electron microscopy quantitative immunogold labeling in 3T3 mouse fibroblasts, mitogenically stimulated by IGF-I. The enzyme, which in untreated cells is present in the cytoplasm, except for the organelles, and in the nucleoplasm, after IGF-I treatment is reduced in the cytoplasm and almost doubled in the nucleus. The PKC isoform translocated to the nucleus is the α isozyme, which is found not only associated with the nuclear envelope but mainly with the interchromatin domains. By using in situ matrix preparations, PKC appears to be retained at the nuclear matrix level, both at the nuclear lamina and at the inner nuclear matrix, suggesting a direct involvement in the phosphorylation of nuclear proteins which are responsible for the regulation of DNA replication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01457544
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of sodium tetrathionate stabilization on the distribution of three nuclear matrix proteins in human K562 erythroleukemia cells (1995)
    Springer
    Histochemistry and cell biology 104 (1995), S. 29-36 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Using both conventional fluorescence and confocal laser scanning microscopy we have investigated wheter or not stabilization of isolated human erythroleukemic nuclei with sodium tetrathionate can maintain in the nuclear matrix the same spatial distribution of three polypeptides (Mr 160 kDa and 125 kDa, previously shown to be components of the internal nuclear matrix plus the 180-kDa nucleolar isoform of DNA topoisomerase II) as seen in permeabilized cells. The incubation of isolated nuclei in the presence of 2 mM sodium tetrathionate was performed at 0° C or 37° C. The matrix fraction retained 20–40% of nuclear protein, depending on the temperature at which the chemical stabilization was executed. Western blot analysis revealed that the proteins studied were completely retained in the high-salt resistant matrix. Indirect immunofluorescence experiments showed that the distribution of the three antigens in the final matrix closely resembled that detected in permeabilized cells, particularly when the stabilization was performed at 37° C. This conclusion was also strengthened by analysis of cells, isolated nuclei and the nuclear matrix by means of confocal laser scanning microscopy. We conclude that sodium tetrathionate stabilization of isolated nuclei does not alter the spatial distribution of some nuclear matrix proteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01464783
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  • 7
    Electronic Resource
    Electronic Resource
    Improved bromodeoxyuridine/DNA analysis by anti-BudR monoclonal antibody versus right angle light scatter (1989)
    Springer
    Histochemistry and cell biology 93 (1989), S. 9-11 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Dynamic cell cycle analysis is based on the incorporation of labelled precursors into DNA. Although antibodies to BrdU are very useful for analysing in flow cells which synthesize DNA, this approach has two main limitations. First, the detection of low incorporating cells is often difficult; second, four parameter flow cytometry is not able to correlate cell cycle to any other cellular marker. We have developed a methodology that, employing an IgGH+L as a second antibody and side scatter instead of propidium iodide fluorescence, allows a better discrimination of BudR+ cells. This approach allows the collection of an extra-fluorescent signal, and the analysis of specific cellular markers within the cell cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266840
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  • 8
    Electronic Resource
    Electronic Resource
    Inositol lipids in friend erythroleukemia cells: Evidence for changes in nuclear metabolism after differntiation (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Cell Biochemistry and Function 9 (1991), S. 135-145 
    Details
    ISSN: 0263-6484
    Keywords: Inositol lipids ; differentiation ; nucleus ; Friend erythroleukemia cells ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The incorporation of 32Pi into phospholipids was studied in Friend erythroleukemia cells either induced or not to erythroid differentiation with 4 mM hexamethylenebisacetamide (HMBA). The effect of the differentiating agent on the recovery of radiolabelled phospholipids was compared in whole cells, isolated nuclei and nuclear matrix after in vivo labelling for 1 hr. The procedure employed for the isolation of nuclei was demonstrated to allow only negligible lipid redistribution caused by cell manipulations. Among the lipids extractable from nuclei, acidic phospholipids, and particularly polyphosphoinositides, were more represented than in whole cells, while small differences were found in the other phospholipid classes examined. The comparison between the uninduced and induced condition showed that the relative amounts of nuclear inositol lipids were modified by HMBA treatment of the cells, with a decreased recovery of phosphatidylinositol 4,5 bisphosphate.These results indicate that phosphatidylinositol and its phosphorylation products synthesized in vivo show a different metabolism in nuclei and whole cells. They appear to be tightly bound nuclear components, also present in membrane-deprived nuclei and nuclear matrix, and are probably related to the nuclear events involved in erythroid differentiation.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cbf.290090211
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