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  • Articles  (127)
  • Springer  (127)
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  • Articles  (127)
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  • 1
    Electronic Resource
    Electronic Resource
    Mammalian arylsulfatases A and B: relative rates of hydrolysis of artificial substrates (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 150-151 
    Details
    ISSN: 1420-9071
    Keywords: Arylsulfatase A ; arylsulfatase B ; 4-methylumbelliferyl sulfate ; rodent ; bovine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Rodent and bovine arylsulfatase B hydrolyze 4-methylumbelliferyl sulfate (4MUS) 10- to 30-fold more efficiently than arylsulfatase A. Therefore, 4MUS grossly underestimates arylsulfatase A activity in the presence of excess arylsulfatase B.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952440
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of bone apatite in osteoporotic and normal Eskimos (1983)
    Springer
    Calcified tissue international 35 (1983), S. 392-393 
    Details
    ISSN: 1432-0827
    Keywords: Osteoporosis ; Infrared ; Bone mineral ; Bone resorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary An infrared and x-ray diffraction study of osteoporotic and normal, archaeological Eskimo bones. Osteoporotic bone apatite is greater in crystal size and/or perfection and lower in CO3 than normal bone apatite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405064
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  • 3
    Electronic Resource
    Electronic Resource
    Toxicity of metabolites fromRhizopus Spp. (1982)
    Springer
    Bulletin of environmental contamination and toxicology 28 (1982), S. 637-639 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01605598
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  • 4
    Electronic Resource
    Electronic Resource
    Age changes in bone mineralization, cortical thickness, and Haversian canal area (1980)
    Springer
    Calcified tissue international 31 (1980), S. 5-11 
    Details
    ISSN: 1432-0827
    Keywords: Absorptiometry ; Cortical thickness ; Bone mineral ; Haversian canal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Age-related changes in femoral cortical bone were quantified in an age-graded series of human cadavers. Variables included in this study were cortical thickness, bone mineral content, cortical bone density, summed Haversian canal area, Haversian canal number, and mean Haversian canal area. Females showed significant (P〈0.05) decreases in cortical thickness, bone mineral content, and cortical bone density when plotted against age. Males exhibited slight nonsignificant declines for cortical thickness, bone mineral content, and cortical bone density. Both males and females exhibited significant (P〈0.05) age-related increases in summed Haversian canal area values and Haversian canal number. Females as a group were found to exhibit significantly (P〈0.05) larger mean Haversian canal area values compared with males, but the male group exhibited more Haversian canals per unit area of cortical bone compared with females. Intercorrelations between the bone mineral index and summed Haversian canal area and between cortical bone density and summed Haversian canal area define the role of increasing Haversian canal number and mean canal size per unit area of cortical bone as a factor in the reduction of bone mass as a function of age. Partial correlations between the bone mass variables and the variables assessing Haversian canal size and number further support this argument.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407161
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  • 5
    Electronic Resource
    Electronic Resource
    The transformability of tetragonal ZrO2 in some glass systems (1990)
    Springer
    Journal of materials science 9 (1990), S. 24-27 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00722858
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  • 6
    Electronic Resource
    Electronic Resource
    Quantitative characterization of flaws near a surface using inverse born approximation (1982)
    Springer
    Journal of nondestructive evaluation 3 (1982), S. 183-188 
    Details
    ISSN: 1573-4862
    Keywords: Ultrasonics ; Born inversion ; NDE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract Quantitative reconstruction of volumetric flaws near a surface of an elastic solid has been carried out experimentally by analyzing the scattered ultrasonic waves. The inverse Born approximation (developed for flaws in bulk materials) was tested for the first time in the determination of the size, shape, and orientation of near-surface flaws. We have studied spherical solid inclusions at various depths below the surface. In addition we examined an approximately 2:1 prolate spheroidal inclusion which was located one major axis below the surface. The determination of the flaw's size, shape, and orientation in terms of an equivalent ellipsoid is realized by performing nonlinear least-squares iteration of the one-dimensional Born inversion results obtained at various scattering directions within a finite aperture. The reconstruction is in good agreement with the actual parameters of the flaw.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00565863
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  • 7
    Electronic Resource
    Electronic Resource
    Ultrasonic reflection from a stressed interface (1984)
    Springer
    Journal of nondestructive evaluation 4 (1984), S. 3-12 
    Details
    ISSN: 1573-4862
    Keywords: Ultrasonic ; stress measurements ; interfacial stress ; NiTi ; NDE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract In seeking to develop an NDE technique for verifying the serviceability of NiTi couplers for plumbing unions, it was found that the reflection coefficient for a normally incident ultrasonic wave correlated with the stress level at the NiTi-tubing interface. Current theory pertaining to interface reflection is not complete but, even at present status, there is semiquantitative accord between theoretical predictions and normalized data for reflection coefficient versus stress level. These results are at fixed frequency and with comparable surface roughness. Variation of either frequency or surface roughness further affects the reflection coefficient. Current studies are being pursued to define this effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00711095
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of aluminum ion implantation on the oxidation of an Fe-6 at.% Al alloy at 1173 K (1987)
    Springer
    Oxidation of metals 28 (1987), S. 259-276 
    Details
    ISSN: 1573-4889
    Keywords: Oxidation ; Fe-Al alloys ; Al implantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Samples of an Fe-6 at.% Al alloy were implanted with doses of 5×1016−3×1017 Al+ ions/cm2 at 100 kV, and subsequently oxidized at 1173 K in O2 gas at 27 kPa. By comparison with the behavior of unimplanted specimens, no effect on oxidation was observed if the dose of implant was less than 1×1017 Al+ ions/cm2. At doses of 1×1017 Al+ ions/cm2 or higher, a change in the oxide scaling morphology was effected from a duplex α-Fe2O3-α-Al2O3 scale to an α-Al2O3-enriched film with a dispersion of α-Fe2O3 nodules. Oxygen uptake by the high-dose samples was due principally to nodule formation and weight gains after 45 hr were lower by 50–70% as compared with the unimplanted material. Nucleation and growth of the nodules occurred only within the first 5 hr of reaction, but their presence acted as an upper limit on the benefits provided by implantation of aluminum. Nodule formation was shown to be characteristic of the oxidation properties of the alloy material, not an extraneous feature introduced by the implantation process itself. Surface preparation prior to implantation had little effect on oxidation: high-dose electropolished samples behaved similarly to mechanically polished samples when implanted to comparable doses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00666722
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  • 9
    Electronic Resource
    Electronic Resource
    Interfacial characterization of Nicalon SiC fibre reinforced oxynitride glass matrix composites (1997)
    Springer
    Journal of materials science 32 (1997), S. 4501-4506 
    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 Nicalon SiC and Hi-Nicalon SiC fibre oxynitride glass and glass–ceramic composites were prepared and the interface between the fibres and matrix characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) spectroscopy. It was found that the formation and thicknesses of interfacial layers were primarily determined by the type of fibre reinforcement, but the role of these interfaces in influencing composite properties was dependent on the thermal properties of the matrix. For Nicalon SiC composites, the carbon-rich layer did not promote fibre debonding and toughening unless the matrix had a smaller thermal expansion coefficient than the fibres. For Hi-Nicalon SiC composites, the absence of oxygen in the fibre significantly encouraged chemical reaction between fibre and matrix, resulting in no strengthening or toughening.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018660915306
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  • 10
    Electronic Resource
    Electronic Resource
    Body Size Accounts for Most Differences in Bone Density Between Asian and Caucasian Women (1996)
    Springer
    Calcified tissue international 59 (1996), S. 339-343 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Asian race — Bone density — Anthropometry — Caucasian.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. We compared bone mineral density (BMD) of the whole body (and subregions: arm, leg, and pelvis), hip, spine, lateral spine, wrist, and forearm among Caucasian and Asian women at four geographic centers (Honolulu, HI; Nottingham, UK; Portland, OR; Copenhagen, Denmark). Data were derived from the baseline examination of 1367 Caucasian and 162 Asian women enrolled in the 1609-subject Early Postmenopausal Interventional Cohort (EPIC) study. After adjusting for age, study site, years postmenopause, and years of estrogen use, BMD was approximately 4–6% lower (P 〈 0.05) among Asian women at most skeletal sites, but there was no significant difference for wrist or forearm BMD. Adding height, lean body mass, fat mass, and/or quadriceps muscle strength to the regression models reduced the racial differences at most skeletal sites; after these additional adjustments, Asian women had significantly lower BMD only for the lateral spine (−4.4%; P 〈 0.005), arm (−2.20%; P 〈 0.05) and leg (−1.65%; P 〈 0.05), whereas the wrist was significantly greater (4.64%; P 〈 0.005) for Asian women. Further research is needed to determine why racial differences in BMD persist at certain skeletal sites, but not others, after adjusting for body size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900137
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