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  • Electronic Resource  (8)
  • Polymer and Materials Science  (4)
  • 27.70.+q  (2)
  • Glioma  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Level structure of doubly odd154Ho (1994)
    Springer
    The European physical journal 350 (1994), S. 89-90 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 154Ho was studied via141Pr(16O,3n) reaction at beam energy of 75 MeV. We found two new rotationally aligned bands made of neutron h9/2 and f7/2 orbitals coupled to a proton h11/2 orbital. As with several new high-spin states, up to I=20, the ground state band with odd parity starts to show anomalous signature splitting at I=13 in this doubly odd154Ho. The observed rotational bands in154Ho are quite consistent with the onset of collectivity which appears in general at neutron number of 87 in neutron-deficient rare-earth nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290672
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  • 2
    Electronic Resource
    Electronic Resource
    High-spin states of odd-odd156Ho (1995)
    Springer
    The European physical journal 353 (1995), S. 119-120 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High spin states in the nucleus156Ho have been studied via the fusion-evaporation reaction140Ce(19F,3nγ)156Ho at the beam energy of 82 MeV.γ-γ coincidences, Eγ, Iγ and excitation functions have been measured. With two rotationally-aligned bands identified as π[h11/2]ν [i13/2], we found two new bands with a signature splitting, whose structure is believed to arise from either ν[h9/2] or ν[f7/2] coupled to π[h11/2]. Our placement of γ rays belonging to these new bands suggests that the previously known level scheme should be corrected. We also found many new low-energy γ rays in the low excitation energy. As compared to154Ho, the present nucleus with two more neutrons becomes more collective, and shows well-observed rotationally-aligned bands with a clear signature splitting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295887
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  • 3
    Electronic Resource
    Electronic Resource
    Expression of tenascin in human gliomas: its relation to histological malignancy, tumor dedifferentiation and angiogenesis (1993)
    Springer
    Acta neuropathologica 85 (1993), S. 481-487 
    Details
    ISSN: 1432-0533
    Keywords: Glioma ; Tenascin ; Fibronectin ; Cell differentiation ; Tumor angiogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The immunohistochemical distribution of tenascin (TN), fibronectin (FN), and laminin (LN) was investigated in 56 human gliomas (8 astrocytomas, 15 anaplastic astrocytomas, and 33 glioblastomas) with regards to the histological degree of malignancy and the degree of tumor cell differentiation evaluated by the staining of glial fibrillary acidic protein (GFAP). In 8 anaplastic astrocytomas and 28 glioblastomas, TN was predominantly immunolocalized in the basement membrane zone of the proliferating tumor vessels; sections of all astrocytomas were negative for TN staining. FN was localized in the basement membrane zone of the vessels in all astrocytomas, 12 anaplastic astrocytomas, and 22 glioblastomas. In 7 anaplastic astrocytomas and 19 glioblastomas, both TN and FN were expressed to various degrees in the tumor vessels. However, most of the TN-positive vessels did not express FN, and most of the FN-positive vessels were negative for TN staining. Furthermore, in 6 anaplastic astrocytomas and 12 glioblastomas, either TN of FN, but not both, were expressed in any area on serial sections. Most of the tumor cells around TN-positive, FN-negative tumor vessels did not express GFAP. On the other hand, GFAP was present in most tumor cells around TN-negative, FN-positive vessels. LN was detected in all vascular and pial-glial basement membrane zone of the tissues examined. These findings indicate that the degree of histological malignancy and the degree of cell dedifferentiation of human gliomas correlate well with the expression of TN, but are inversely correlated with the expression of FN. We postulate that the expression of TN, but not of FN, plays a role in the promotion of angiogenesis in malignant gliomas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00230486
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  • 4
    Electronic Resource
    Electronic Resource
    Leptomeningeal dissemination of malignant gliomas. Incidence, diagnosis and outcome (1994)
    Springer
    Acta neurochirurgica 126 (1994), S. 84-92 
    Details
    ISSN: 0942-0940
    Keywords: Glioma ; astrocytoma ; glioblastoma ; leptomeningeal dissemination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To understand the clinicopathology features of leptomeningeal dissemination of malignant gliomas, a total of 157 consecutive patients treated between 1978 and 1989 were analysed. Twenty-two patients (14%) were judged to have dissemination. In 20 patients, the dissemination was diagnosed antemortem. Eleven patients had neurological deficits due to dissemination, whereas the other 9 without these had CT or myelographic evidence of dissemination. The peak incidence of dessemination was seen in the first and second decades of life. The mean age of 22 patients with dissemination was 31 years, significantly lower than that (44.5 years) of patients without dissemination. Fifteen patients developed dissemination within one year after diagnosis (early dissemination), 60% of them were less than 30 years of age. All patients with late dissemination (more than one year after diagnosis) underwent a second craniotomy for tumour removal before dissemination, while none of the 15 patients with early dissemination did. Survival after diagnosis in patients with dissemination was shorter, although statistically not significant, than that of patients without dissemination. Survival after dissemination was limited in all patients (mean 19 weeks, range 2–39 weeks). Immunohistochemical study revealed that the disseminated tumour expressed less glial fibrillary acidic protein than the primary tumour. Our results suggest that dissemination does not seem to result from extended survival of the patients, but may occur at any time in malignant gliomas. Some malignant gliomas, especially in younger patients, have a capability to acquire biological characteristics suitable for dissemination in the earlier stage of the disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01476415
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis of poly(amino acid)s on molecular assemblies formed by functional active esters of amino acids (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 1665-1673 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The new active β-alanine and glycine esters (6 and 7) of N-hydroxy-2,3-dihexadecylsuccinimide were prepared and their polycondensation was studied. The aggregation behavior of these esters was examined by an electron microscopy and an osmotic method. They formed multilamella in water and reversed micelle in nonpolar solvents. These solvents were found to be suitable for the polycondensation, which gave the corresponding poly(amino acid)s. The results of polycondensation can be explained by assuming that the aggregations, that is, multilamella in water and reversed micelle in nonpolar solvents, are playing an important role in the polycondensation.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270518
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of poly(β-alanine) on the surface of the functional lamella (1987)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 25 (1987), S. 345-350 
    Details
    ISSN: 0887-6258
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1987.140250807
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of rapid heating with infrared radiation on RF magnetron-sputtered calcium phosphate coatings (1997)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 37 (1997), S. 60-67 
    Details
    ISSN: 0021-9304
    Keywords: heat treatment ; calcium phosphate ; coating ; sputter ; implant ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: This study evaluated the effect of rapid heating with infrared radiation on the physico-chemical and morphological properties of radio frequent (RF) magnetron-sputtered calcium phosphate (Ca-P) coatings. About 2.5 μm thick Ca-P coatings were deposited on titanium disks and cylinders. These specimens were left untreated or were heat treated by infrared radiation at 300, 400, 500, 600, and 700°C for 4, 7, 11, 17, and 24 s. Subsequently, the specimens were immersed in simulated body fluid (SBF) for 1 day, 1 week, and 5 weeks. X-ray diffraction measurements showed that heating at 500°C or higher resulted in an increase of coating crystallinity. In addition, FT-IR measurements revealed the appearance of OH peaks in the spectra of samples treated at 500-700°C. Electron probe microanalysis showed that after 5 weeks of immersion about 40-50% of the coatings heat treated at 500 and 600°C was maintained. The coatings heat treated at 700°C showed no dissolution at all. On the other hand, as-coated and 300°C treated films were dissolved within 1 day. Scanning electron microscopy of the samples showed that directly after heat treatment no apparent cracks were present in the coatings. On the basis of these findings, we conclude that rapid heating with infrared radiation around 600°C is the best heat treatment for RF magnetron-sputtered coatings. © 1997 John Wiley & Sons, Inc. J Biomed Mater Res, 37, 60-67, 1997.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Mechanical and histologic evaluation of Ca-P plasma-spray and magnetron sputter-coated implants in trabecular bone of the goat (1997)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 36 (1997), S. 75-83 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The aim of this study was to investigate the bone response to calcium phosphate (Ca-P) plasma-spray and radiofrequency magnetron sputter-coated implants with comparable roughness. Therefore, tapered conical screw designed implants were installed in the trabecular bone of the femurs of nine goats. They were provided with two types of coatings, a plasma-spray dual coating of fluorapatite and hydroxyapatite (FA/HA-PS) and a titanium plasma-spray coating, covered with an amorphous Ca-P magnetron sputtercoating (TPS/Ca-P-a). These implants were evaluated histologically and mechanically after 3 months of implantation. A well-controlled method to apply and measure a torsional force to load the screw-type implants to the point of failure was introduced. All implants healed uneventful and were well fixed. No significant difference (Student t test, p 〉 0.05) for the torsional failure force was measured for both type of coatings. Nevertheless, SEM revealed differently situated fracture planes. Light microscopy showed intimate bone-implant contact for both types of coatings; original drill margins were still visible. A lamellar type of bone with some remodeling lacunae was shown. Histomorphometry revealed a higher percentage of bone contact for the FA/HA-PS-coated implants (student t test, p 〈 0.05). Measurement of the amount of bone revealed more bone mass around TPS/Ca-P-a-coated implants (analysis of variance and Tukey multiple comparison, p 〈 0.05). © 1997 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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