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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 92 (May 2003), p. 231-234 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 97 (1989), S. 150-157 
    ISSN: 0942-0940
    Keywords: Flow cytometry ; brain tumour ; cell kinetics ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary With the aid of flow cytometry (FCM), distribution of DNA content in 40 cases of brain tumour, primary culture cell, and secondary culture cell can be determined and chronological change after subculture is studied from the analysis of their cell cycle. In most primary cultures, proliferating index (PI) is likely to decrease, which suggests that environmental change might affect the growth activity. In comparison with that of the original sample, DNA-histogram of the secondary culture can be divided into the following 3 types: the type recovering to the original pattern (“adapting type”), in which astrocytoma, ependymoma, glioblastoma and medulloblastoma are included, 2) the type increasing more at G2 + M phase than the original (“proliferating type”), in which meningioma and some of glioblastoma are included, and 3) the type decreasing so far as to induce degeneration or death (“degenerating type”), in which pituitary adenoma and neurinoma are included. FCM is of great usefulness for the study of cell kinetics of a tumour cell undergoing culture and the present method will be available for the respective study of biological characteristics of the cultured cell, established cell line or sensitivity test for antineoplastic agents.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0942-0940
    Keywords: Maffucci's syndrome ; pituitary adenoma ; chondroma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Maffucci's syndrome is a rare, congenital mesodermal dysplasia combined with dyschondroplasia and haemangiomatosis, and there are only about 150 reported cases. This syndrome is often combined with other neoplasms. Our case was associated with goitre, enchondroma of the tuberculum sellae and pituitary adenoma; the latter brought about disturbance of vision. Including ours, four cases of Maffucci's syndrome associated with pituitary adenoma are found in the literature. In the case of Maffucci's syndrome, it is necessary to examine associated disease as well as associated pituitary adenoma and skull base enchondroma, similar to the correlation of von Recklinghausen's disease with acoustic neurinoma.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In order to investigate the el led of occlusion on the skin, the flexor sides of both upper arms were covered with column-shaped closed chambers, 30 mm in outer diameter. 20 mm in inner diameter. and 5 mm in height, which were made of polyethylene loam. The tops of the chambers were sealed be plastic films with various levels of water vapor permeability to control moisture in each chamber. The raised chamber walls prevented direct contact between the skin and the plastic film. After 24 h of application, morphological changes of the skin surface were observed microscopically by the nitrocellulose-replica method. Although no visual alterations were found on all areas of occluded skin, microscopic evaluation showed that simple occlusion by films induced an increase in the number of deepened skin furrows on the skin surface. This increase was associated with lower water vapor permeability of the films, as well as with higher values of both temperature and humidity on the test day. Thus, since conditions which facilitate perspiration from the skin lend to cause skin irritation, prolonged exposure of the skin to sweat by simple occlusion may act as a primary skin irritant
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica B+C 117-118 (1983), S. 938-940 
    ISSN: 0378-4363
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 292 (1993), S. 281 
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 253 (1991), S. 273 
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Hypocretins/orexins are neuropeptides implicated in sleep regulation and the sleep disorder narcolepsy. In order to examine how hypocretin activity fluctuates across 24 h with respect to the sleep–wake cycle, we measured changes in extracellular hypocretin-1 levels in the lateral hypothalamus and medial thalamus of freely moving rats with simultaneous sleep recordings. Hypocretin levels exhibited a robust diurnal fluctuation; levels slowly increased during the dark period (active phase), and decreased during the light period (rest phase). Levels were not correlated with the amount of wake or sleep in each period. Although an acute 4-h light-shift did not alter hypocretin levels, 6-h sleep deprivation significantly increased hypocretin release during the forced-wake period. Hypocretin activity is, thus, likely to build up during wakefulness and decline with the occurrence of sleep. These findings, together with the fact that a difficulty in maintaining wakefulness during the daytime is one of the primary symptoms of hypocretin-deficient narcolepsy, suggest that hypocretin activity may be critical in opposing sleep propensity during periods of prolonged wakefulness.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 31 (2004), S. 0 
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  The purpose of the current study was to evaluate the effect of two-component ceramic primers on the bond strength of a composite material joined to a sintered porcelain material. Two sizes of porcelain discs (VMK 68; 10 and 8 mm in diameter by 2·5 mm thick) were ground (No. 1000 SiC), and surface-conditioned using one of the following systems: (i) unprimed, (ii) Liquid A of the Porcelain Liner M material (PLM-A), (iii) Liquid B of Porcelain Liner M (PLM-B), (iv) Liquids A and B of Porcelain Liner M (PLM-AB), (v) Liquid A of the Tokuso Ceramics Primer material (TCP-A), (vi) Liquid B of Tokuso Ceramics Primer (TCP-B) and (vii) Liquids A and B of Tokuso Ceramics Primer (TCP-AB). All specimens were bonded with the Bistite II dual-cured composite luting agent, and shear bond strengths were determined both after 24 h immersion in water and after subsequent thermocycling (4–60 °C, 1 min each, 20 000 cycles). Of the seven groups assessed, two groups (PLM-AB and TCP-AB) showed the greatest bond strength both before (30·7 MPa for PLM-AB and 29·7 MPa for TCP-AB) and after (19·7 MPa for PLM-AB and 22·4 MPa for TCP-AB) thermocycling (P 〈 0·05). No significant differences were found between the PLM-AB and TCP-AB groups regardless of the application of thermocycling (P 〉 0·05). It can be concluded that both of the acid-catalysed two-liquid ceramic primers showed superior bonding to the unhydrolysed single-liquid silane agents (PLM-B and TCP-A) when the feldspathic porcelain was bonded with the Bistite II luting composite.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 30 (2003), S. 0 
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary This study determined the hardness, solubility and curing depth of a new photo-activated composite polymerized with three different laboratory photo-curing units for the purpose of evaluating the post-curing properties of the material. A new photo-activated composite material for both direct and indirect applications (DiamondCrownTM) was polymerized with three photo-curing units equipped with the following light sources: (i) two halogen lamps (DiamondLite-VLTM. Halogen Light Curing Booth); (ii) two metal halide lamps (Hyper LII) and (iii) two xenon stroboscopic tubes (UniXS II). Knoop hardness, water solubility and curing depth were determined for groups of five specimens according to standardized testing methods. All data were compared using analysis of variance (anova) and Scheffe's S intervals (P 〈 0·05). The Knoop hardness number (KHN) generated with the metal halide unit (63·3 ± 2·4 KHN) was statistically (P 〈 0·05) greater than those produced by the other two curing units. Water solubility values for both the halogen unit (2·5 ± 0·5 μg mm−3) and the metal halide unit (2·5 ± 0·5 μg mm−3) were significantly (P 〈 0·05) lower than for the xenon unit (3·8 ± 0·5 μg mm−3). Of the three photo-curing units, the metal halide curing-unit consistently exhibited the greatest depth of cure. The composite material appears to be reliable, although its post-curing properties were found to be influenced by the type of curing unit.
    Type of Medium: Electronic Resource
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