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  • 1
    Electronic Resource
    Electronic Resource
    Quasi-reflexivity, weakly unconditionally convergent series and weak compactness (1969)
    Springer
    Mathematische Annalen 182 (1969), S. 45-54 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01350162
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  • 2
    Electronic Resource
    Electronic Resource
    Thermoluminescence and hydroxyl defects associated with broad-band infra red absorption in synthetic quartz (1990)
    Springer
    Physics and chemistry of minerals 17 (1990), S. 27-33 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract A study has been made of thermoluminescence from synthetic quartz with varying hydroxyl impurity concentrations up to approximately 300 H/106 Si which are associated with a “broad-band” IR absorption in the range 2600–3700 cm−1. These hydroxyl defects are known to be important in the hydrolytic weakening of quartz. We have found only minor differences in the glow curves of unheated crystals but significant intensity increases when “wet” crystals are heated sufficiently to cause bubble formation. It would seem that the electron traps are unaffected by the bubble formation, but the electron/luminescence centre radiative recombination probability is increased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00209222
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  • 3
    Electronic Resource
    Electronic Resource
    Prediction of Breaking Strength in Osteoporotic Avian Bone Using Digitized Fluoroscopy, a Low Cost Radiographic Technique (2000)
    Springer
    Calcified tissue international 67 (2000), S. 309-313 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Osteoporosis — Radiography — Bone breaking strength — Avian bone — Fluoroscopy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. Bone fragility in caged laying hens is a severe welfare problem, with fracture incidences in commercial flocks of up to 30% of all hens during their life. This fragility has been attributed to osteoporosis, the etiology of which is multifactorial in birds, as in humans, with genetic, environmental, and nutritional components. Greater understanding of the development of the disorder in hens could be obtained from the same kind of in vivo assessments available in human studies of osteoporosis. These high technology techniques for evaluation of bone mineral density (BMD), such as single or dual energy X-ray absorptiometry (SXA or DXA), quantitative computerized tomography (QCT), or attenuation by ultrasound (US), are so far not widely available to nonclinical researchers. We have modified an older X-ray film technique, radiographic absorptiometry (RA) by digitization of the analog video signal from a Philips BV-25 image intensifier, in single pulse fluoroscopy mode, and subsequent computer analysis with the public domain software package, NIH-Image 1.60. Compared with conventional RA, which uses standard X-ray film, our modified technique reduces X-ray exposure and allows the operator to digitize, store, and analyze many more images in a shorter time. We have called this modified technique ``digitized fluoroscopy'' (DF). In a longitudinal study of humeral radiographic density in a flock of 165 laying hens, significant relationships (P 〈 0.001) were observed between assessments made as early as 25 weeks, utilizing this DF technique in the humerus, and breaking strengths (and other postmortem indicators of osteoporosis) measured at 70 weeks. We conclude that DF can predict some eventual parameters of bone mass measured at 70 weeks from 25 to 40 weeks onward in bones from the same site in laying hens. The relationship between DF measurements made in the humerus and postmortem measurements of radiographic density and breaking strength made at another site (tibia) are less strong but still significant from 40 weeks onward.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002230001120
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  • 4
    Electronic Resource
    Electronic Resource
    Enhanced cohesion of photo-oxygenated fullerene films: A new opportunity for lithography (1993)
    Springer
    Applied physics 57 (1993), S. 299-303 
    Details
    ISSN: 1432-0630
    Keywords: 61.46 ; 33.80.Gj ; 82.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The irradiation of sublimed fullerene (C60 and C70) thin films with ultraviolet light in an oxygen-rich ambient has been found to lead to a substantially increased cohesive energy in the fullerene solid. The decreased solubility and lower vapor pressure of the phototransformed material enables wet (organic solvents) or dry (thermal or photon-induced sublimation) development of photo-defined negative images. One micrometer wide lines with good edge definition are demonstrated. X-ray, infrared, optical absorption, and high performance liquid chromatography reveal that photo-oxygenated C60 retains its fcc crystal structure but with a substantial fraction of the C60 molecules modified with carbonyl (C=O) bonds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332606
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  • 5
    Electronic Resource
    Electronic Resource
    The early effects of sympathectomy on bone blood flow (1984)
    Springer
    Calcified tissue international 36 (1984), S. 622-624 
    Details
    ISSN: 1432-0827
    Keywords: Sympathectomy ; Microspheres ; Bone blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Several laboratories, including our own, have investigated the physiology of bone blood flow by perfusion of the tibia via the nutrient artery. Any damage caused to the nerve supply by cannulation of the artery might affect the results. The possible effect of such damage was investigated by measuring blood flow to the dog tibia using a microsphere technique, before and after sympathectomy. No effect was found and the tibial nutrient artery is therefore a suitable vessel for perfusion when estimating nutrient exchange in bone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405377
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  • 6
    Electronic Resource
    Electronic Resource
    Clearance of arsenic ingested by man from arsenic contaminated fish (1979)
    Springer
    Bulletin of environmental contamination and toxicology 22 (1979), S. 224-229 
    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/BF02026934
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  • 7
    Electronic Resource
    Electronic Resource
    Charge and mass radii of the tin isotopes (1988)
    Springer
    The European physical journal 329 (1988), S. 393-405 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ft ; 21.10.Gv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Data on the isotope shift of the nuclear charge densities of the tin isotopes and of their mean square charge radii are considered from the viewpoint of the Hartree-Fock and Droplet Models. Attention is paid to the electromagnetic corrections of order 1/m2. Through a leptodermous analysis of charge and matter densities we find: (i) differences of m.s. charge radii are mainly sensitive to the external region, (ii) the electromagnetic corrections are important in that region, (iii) despite different leptodermous properties, forces Ska and GO-P lead to the same neutron skin thickness. The average rate of variation of the proton m.s. radius is interpreted as favouring either a low valueQ≈30 MeV for the droplet model asymmetry parameter, or a zero value for the saturation asymmetry parameterL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294344
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  • 8
    Electronic Resource
    Electronic Resource
    Analytical applications of neutron depth profiling (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 112 (1987), S. 33-46 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Using a low-energy neutron beam as an isotopic probe, neutron depth profiling (NDP) provides quantitative depth profiles in nearly all solid matrix materials. Several of the light elements, such as He, Li, B, and N can be nondestructively analyzed by NDP. The information obtained using NDP is difficult if not impossible to determine by non-nuclear techniques. As a result, NDP is used collaboratively with techniques such as SIMS, RBS, FTIR, PGAA, and AES. Profiles measured by NDP are given for semiconductor and optical processing materials, and light weight alloys. Improvements in the technique are discussed with emphasis on the use of intense cold neutron beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037274
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  • 9
    Electronic Resource
    Electronic Resource
    Direct measurement ofk o for monitor neutron activation analysis (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 179 (1994), S. 105-112 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper introduces the thermal column or the cold neutron guide beam of the 20 MW NBSR at the National Institute of Standards and Technology as a directk o measurement facility. Measurement ofk o at this facility not only produces accurate values, but avoids the additional correction factors needed in other measurement methods. Thek o of Sb, Ag and Cr with respect to Sc as monitor have been measured and their values are comparable to values based on tabulated nuclear constants and to those measured by other researchers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037930
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  • 10
    Electronic Resource
    Electronic Resource
    Precise determination of aluminum by instrumental neutron activation (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 113 (1987), S. 35-42 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Because of the short half life of Al-28, the determination of aluminum by neutron activation is subject to many inaccuracies: variation of irradiation conditions between sample and standard, uncertainties in timing, and the effects of high and varying count rate, in addition to other sources of error that must be controlled even in work with long-lived nuclides. These errors can all be made smaller than the fundamental limit set by counting statistics, even when that limit is below 0.5 percent. The transfer function from the observed number of net counts to the counting rate at the end of irradiation is modeled as a product of three processes: radioactive decay and extending and nonextending dead time. The procedure has been applied to the analysis of NBS SRM 1633a Fly Ash. The mean concentration measured was 14.085% Al, with a standard deviation of the mean 0.023% Al for four determinations. The final results showed no significant imprecision beyond counting statistics. The accuracy of the method is shown by the analysis of high-purity single-crystal sapphire.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036046
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