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  • 1
    Electronic Resource
    Electronic Resource
    Comparison between disaccommodation and ferromagnetic resonance measurements in polycrystalline nickel ferrites (1995)
    Springer
    Applied physics 60 (1995), S. 303-307 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 76.50; 75.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. FerroMagnetic Resonance (FMR) measurements of polycrystalline nickel ferrites at 11 GHz from 77 to 400 K have been carried out. The different contributions to the FMR linewidth have been studied by a computational technique based on the parameters previously obtained for single-crystal nickel ferrite. A new qualitative comparison between the FMR and disaccommodation measurements by means of the induced anisotropy formalism is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01538408
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison between disaccommodation and ferromagnetic resonance measurements in polycrystalline nickel ferrites (1995)
    Springer
    Applied physics 60 (1995), S. 303-307 
    Details
    ISSN: 1432-0630
    Keywords: 76.50 ; 75.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract FerroMagnetic Resonance (FMR) measurements of polycrystalline nickel ferrites at 11 GHz from 77 to 400 K have been carried out. The different contributions to the FMR linewidth have been studied by a computational technique based on the parameters previously obtained for single-crystal nickel ferrite. A new qualitative comparison between the FMR and disac-commodation measurements by means of the induced anisotropy formalism is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01538408
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  • 3
    Electronic Resource
    Electronic Resource
    TIGUKAT: A uniform behavioral objectbase management system (1995)
    Springer
    The VLDB journal 4 (1995), S. 445-492 
    Details
    ISSN: 0949-877X
    Keywords: Objectbase management ; database management ; reflective system ; persistent storage system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract We describe the TIGUKAT objectbase management system, which is under development at the Laboratory for Database Systems Research at the University of Alberta. TIGUKAT has a novel object model, whose identifying characteristics include a purely behavioral semantics and a uniform approach to objects. Everything in the system, including types, classes, collections, behaviors, and functions, as well as meta-information, is a first-class object with well-defined behavior. In this way, the model abstracts everything, including traditional structural notions such as instance variables, method implementation, and schema definition, into a uniform semantics of behaviors on objects. Our emphasis in this article is on the object model, its implementation, the persistence model, and the query language. We also (briefly) present other database management functions that are under development such as the query optimizer, the version control system, and the transaction manager.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01231644
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  • 4
    Electronic Resource
    Electronic Resource
    Bone mass in androgen-insensitivity syndrome: Response to hormonal replacement therapy (1995)
    Springer
    Calcified tissue international 57 (1995), S. 94-96 
    Details
    ISSN: 1432-0827
    Keywords: Androgen insensitivity syndrome ; Hormone replacement therapy ; Bone mineral density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract The response of bone mass to long-term treatment with estrogen and progesterone in patients with complete androgen-insensitivity syndrome (AIS) is unknown. We report a 17-year-old female patient (karyotype 46 X, Y) with AIS studied during a 4-year period. Bone mineral density (BMD) measured by dual X-ray absorptiometry in lumbar spine and proximal femur was sharply reduced at the initial visit, and remained unchanged during long-term follow-up on hormone replacement therapy with estrogens and progestin. Bone metabolism markers were all in the normal range. The lack of significant increase in BMD highlights the importance of androgens on bone physiology that cannot be balanced in spite of an appropriate estrogenic milieu.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00298426
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  • 5
    Electronic Resource
    Electronic Resource
    Vertebral fractures and osteopenia in chronic alcoholic patients (1995)
    Springer
    Calcified tissue international 57 (1995), S. 111-114 
    Details
    ISSN: 1432-0827
    Keywords: Osteoporosis ; Alcoholism ; Ethanol ; Vertebral fractures ; Bone fractures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract To assess whether vertebral fractures are associated with osteopenia in chronic alcoholic patients, a transversal study was carried out in 76 chronic alcoholic males and 62 age-matched healthy males. Lumbar bone mineral density (BMD) by dual photon absorptiometry and spinal chest X-ray films were done in all patients. Twenty-seven patients (36%) had vertebral fractures, but only 5 of them had a BMD below the fracture threshold. Twenty-two patients (29%) had osteoporosis by densitometric criteria. There were no significant differences in lumbar BMD between alcoholic patients with and without vertebral fractures (1.11±0.2 versus 1.13±0.2, P=ns). Previous trauma was recorded in 24 of the 27 patients with vertebral fractures and in 28 of the 49 patients without vertebral fractures (P〈0.001). Moreover, patients with vertebral fractures had more peripheral fractures than patients without vertebral fractures (81% versus 49%, P=0.01). Only one patient was aware of a previous episode of traumatic vertebral fracture. In conclusion, chronic alcoholics frequently have traumas and vertebral fractures, the latter despite having a lumbar BMD above the fracture threshold, suggesting a frequent but unrecognized association between both processes. These results suggest that both spine films and BMD measurements should be obtained for diagnosis of osteoporosis in alcoholic patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00298430
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  • 6
    Electronic Resource
    Electronic Resource
    A splicing mutation, a nonsense mutation (Y167X) and two missense mutations (I159T and A209V) in Spanish patients with ornithine transcarbamylase deficiency (1995)
    Springer
    Human genetics 〈Berlin〉 96 (1995), S. 549-551 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Four novel mutations are identified in the ornithine transcarbamylase (OTC) gene, in four patients with OTC deficiency (an X-linked disorder). The mutations represent three different categories: missense (Ile159Thr and Ala209Val), nonsense (Tyr167Stop), and causing inefficient splicing (G→A in the first intronic base) with associated aberrant splicing. They are located in exons 5, and 6, and in intron 3. Two of the mutations arose de novo in the patients, and only one mutation occurs at a CpG site. The nonsense and the splicing mutation cause, respectively, lethal early onset and non-lethal, delayed early onset clinical presentations in males. Our results confirm for Spain the high genotypic heterogeneity of OTC deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00197410
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  • 7
    Electronic Resource
    Electronic Resource
    Spatial congruence between exine pattern, microtubules and endomembranes in Vigna pollen (1995)
    Springer
    Sexual plant reproduction 8 (1995), S. 147-151 
    Details
    ISSN: 1432-2145
    Keywords: Microtubules ; Cytoskeleton ; Endoplasmic reticulum ; Pollen ; Exine ; Pattern formation ; Vigna vexillata ; DiOC6
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The role of microtubules and endomembranes in pollen wall pattern formation in Vigna vexillata L. was examined using fluorescence laser scanning confocal microscopy. Indirect immunofluorescence using anti-β-tubulin antibodies revealed that the arrangement of the cortical microtubular cytoskeleton in microspores resembled the reciprocal of the reticulate ektexine ornamentations of mature V. vexillata pollen. Patches of microtubules in cortical cytoplasm corresponded in location with the lumina of the exine reticulum and with apertural sites. Microtubules were absent from cytoplasm under muri (ridges) of the exine reticulum. Labeling of microspores during the mid-tetrad stage with the endomembrane-specific fluorochrome DiOC6 produced a pattern similar to that of the microtubules; i.e., DiOC6 staining was localized in cytoplasm underlying lumina and absent from cortical cytoplasm underlying sites of muri. This report represents the first observation of congruence of the pattern of occurrence of any subcellular organelles with exine pattern and, in particular, the congruence of both microtubules and endomembranes in cortical cytoplasm with the lumina of the reticulate exine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00242259
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of the age on air permeability of concrete (1995)
    Springer
    Journal of materials science 30 (1995), S. 5657-5662 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A great interest is being taken in the measurement of concrete permeability because of increased concerns about the durability of concrete when exposed to aggressive environments. However, the variation of the concrete permeability with time has not been systematically studied. Air permeability results recorded for 20 years in six 0.2 m3 concrete slabs are presented. These results have a qualitative value as boundary effects are unknown. The great difference in flow between the specimens with the same mix design, casting and curing procedure, which have been kept in the same testing room sheltered from rain, is noticeable. The air permeability coefficient increases with time, reaching an almost stable value after 20 years. The pore evaporated water creates a path for air flow through the concrete and this is supposed to be the main cause of the increase in permeability. The method presented in this paper gives reliable information about the quality of the concrete studied in terms of air permeability and hence, durability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356701
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  • 9
    Electronic Resource
    Electronic Resource
    The maize transcription factor Opaque-2 activates a wheat glutenin promoter in plant and yeast cells (1995)
    Springer
    Plant molecular biology 29 (1995), S. 711-720 
    Details
    ISSN: 1573-5028
    Keywords: Opaque-2 ; glutenin ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The promoter of the wheat low-molecular-weight glutenin (LMWG1D1) gene contains a cis element called the GCN4 like motif (GLM) which has low homology to one class of binding site for the maize endosperm-specific b-ZIP transcription factor Opaque-2 (O2). Previous work has shown that the GLM element interacts with the nuclear factor ESBFII during wheat endosperm development at the time of maximum transcription of the LMWG1D1 gene. In this paper we demonstrate that O2 binds to the GLM element and can activate high levels of transcription from the wheat GLM in transient assays in plant protoplasts and in yeast cells. Lower levels of O2 activation through the GLM element in yeast containing a defective GCN4 gene showed that GCN4 was necessary for high levels of O2 transcriptional activation, indicating that O2 may need to heterodimerise with GCN4 to activate transcription in yeast. These observations provide evidence that the GLM represents a new type of O2 DNA-binding site, and support a postulate that an O2 homologue may activate endosperm-specific expression of wheat storage protein genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041162
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  • 10
    Electronic Resource
    Electronic Resource
    Functional analysis of theDrosophila CDC2 Dm gene in fission yeast (1995)
    Springer
    Molecular genetics and genomics 248 (1995), S. 621-628 
    Details
    ISSN: 1617-4623
    Keywords: Drosophila ; CDC2 ; Fission yeast ; Cell cycle ; UV hypersensitivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thecdc2 + gene product (p34cdc2) is a protein kinase that regulates entry into mitosis in all eukaryotic cells. The role that p34cdc2 plays in the cell cycle has been extensively investigated in a number of organisms, including the fission yeastSchizosaccharomyces pombe. To study the degree of functional conservation among evolutionarily distant p34cdc2 proteins, we have constructed aS. pombe strain in which the yeastcdc2 + gene has been replaced by itsDrosophila homologue CDC2Dm (theCDC2Dm strain). ThisCDC2Dm S. pombe strain is viable, capable of mating and producing four viable meiotic products, indicating that the fly p34CDC2Dm recognizes all the essentialS. pombe cdc2 + substrates, and that it is recognized by cyclin partners and other elements required for its activity. The p34CDC2Dm protein yields a lethal phenotype in combination with the mutant B-type cyclin p56cdc13-117, suggesting that thisS. pombe cyclin might interact less efficiently with theDrosophila protein than with its native p34cdc2 counterpart. ThisCDC2Dm strain also responds to nutritional starvation and to incomplete DNA synthesis, indicating that proteins involved in these signal transduction pathways, interact properly with p34CDC2Dm (and/or that p34cdc2-independent pathways are used). TheCDC2Dm gene produces a ‘wee’ phenotype, and it is largely insensitive to the action of theS. pombe weel + mitotic inhibitor, suggesting thatDrosophila weel + homologue might not be functionally conserved. ThisCDC2Dm strain is hypersensitive to UV irradiation, to the same degree asweel-deficient mutants. A strain which co-expresses theDrosophila and yeastcdc2+ genes shows a dominantwee phenotype, but displays a wild-type sensitivity to UV irradiation, suggesting that p34cdc2 triggers mitosis and influences the UV sensitivity by independent mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02423458
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