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  • 2005-2009
  • 1995-1999  (7)
  • 1970-1974  (4)
  • 1860-1869
  • 1995  (7)
  • 1972  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Review of accelerator based sources (invited) (abstract) : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1999-1999 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The development of storage rings for synchrotron radiation have now arrived at so-called third-generation and have straight sections with optical functions optimized for undulators and electron beams of very small emittances. The beam optics of the ring is chosen so as to minimize the quantum excitation of betatron oscillations which determine the emittance. This can be achieved with a ring containing many cells with a small bending angle and with strong focusing in each cell. The first point results in large and expensive rings and both points require strong sextupole magnets for the chromaticity correction which can limit the dynamic acceptance. The optimization of storage rings with these points in mind lead to lattices which have achromatic cells with two, three, or more bending magnets. Studies for future rings consider further methods like the use of wigglers, combined function magnets, increased transverse damping partitions, etc. in order to obtain even smaller emittances which approach the diffraction limit. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145781
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  • 2
    Electronic Resource
    Electronic Resource
    Spin–orbit effects in the photodissociation of ionized rare gas trimers: Comparison of He+3, Ar+3, and Xe+3 (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 3450-3462 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The velocities of neutral and charged photofragments of the rare gas trimers He+3, Ar+3, and Xe+3 have been examined in a comprehensive study for photon energies ranging from 1.5 to 6 eV. For this purpose, a novel time-of-flight technique has been applied which allows the simultaneous examination of both neutral and charged fragments. The general fragmentation pattern of all three species was that of a linear trimer with a parallel transition moment and a totally repulsive excited state: In the course of the dissociation, two of the particles gain high velocities in opposite directions, while the third particle (the middle particle of the linear trimer) only obtains a small velocity. The positive charge generally localizes on one of the fast outer particles, as can be expected from the symmetry properties of the excited state. For Ar+3 and Xe+3, however, also localization of the charge on the slow particle can be observed. This effect strongly depends on the energy of the absorbed photon, and can be quenched by decreasing the vibrational excitation of the trimer. Comparison of the results with new potential energy surface calculations indicate that mainly spin–orbit coupling induced conical intersections are responsible for this charge redistribution phenomenon. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470229
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrous, silica-rich melts in the sub-arc mantle and their relationship with erupted arc lavas (1995)
    [s.l.] : Nature Publishing Group
    Nature 377 (1995), S. 595-600 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Hydrous, silica-rich melts migrating through the mantle are preserved as glass inclusions in mantle minerals in xenoliths from Philippine arc lavas. These melts, with chemistries that indicate an origin by very low degrees of melting of the subducted ocean crust, have altered their host ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/377595a0
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  • 4
    Electronic Resource
    Electronic Resource
    Turbidity and mass concentration of suspended matter in lake water: A comparison of two calibration methods (1995)
    Springer
    Aquatic sciences 57 (1995), S. 54-69 
    Details
    ISSN: 1420-9055
    Keywords: Nephelometry ; suspended particles ; mass-calibration ; Lake Lugano (Lago di Lugano)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Turbidity measurements by foreward scattering nephelometer have been regularly conducted on the north basin of Lake Lugano (Switzerland/Italy) since September 1992. In order to determine mass concentrations from these data, both, in-situ and laboratory calibration experiments have been performed in November and December 1992 on suspended matter of the hypolimnion. Results show: 1. Mass concentration/turbidity ratios are different in the two turbidity zones examined due to variation in the optical signature of the suspended matter. 2. Laboratory calibrations using suspended matter originating from the water depths of interest give representative results provided that physical and chemical alterations occuring during the particle transfer process remain negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878026
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  • 5
    Electronic Resource
    Electronic Resource
    Fundamentals and possibilities of classification of occupational substances as developmental toxicants (1995)
    Springer
    International archives of occupational and environmental health 67 (1995), S. 139-145 
    Details
    ISSN: 1432-1246
    Keywords: Developmental toxicants ; Classification scheme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract It is now widely accepted that describing and labeling of chemicals as developmental toxicants on a purely qualitative basis does not make sense. Agents possessing the potential to induce reproductive or developmental toxicity present a risk of human harm only under certain conditions. This critical fact cannot be properly communicated with a simple designation as “positive” or “negative”. Rather, a number of parameters that deal with dose or concentration, frequency, duration and route of exposure must also be conveyed. Unsubstantiated blacklisting is equally counterproductive for preventive medicine as downplaying of the toxicity of chemicals. Gender-based restrictions on exposure at workplaces of women of child-bearing age are neither socially acceptable nor scientifically justifiable. Therefore, the German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area published in 1983 a quantitatively based classification concept, which became effective in 1985 and was modified in the following years. The present contribution summarizes what is required for an integrated judgment on the relevance of laboratory and epidemiological data for predicting the potential risk associated with exposure at workplaces to occupational chemicals. Methyl mercury, carbon disulfide, dimethylformamide, ethanol, toluene,N,N-dimethyl acetamide, nitrous oxide, methanol, ethyl benzene, and phosphorus pentoxide will be described as examples of classified substances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626344
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Tierexperimentelle Untersuchungen zur gewerbetoxikologischen Beurteilung von 2-Chloräthylisocyanat (1972)
    Springer
    Archives of toxicology 29 (1972), S. 73-84 
    Details
    ISSN: 1432-0738
    Keywords: 2-Chloroethyl Isocyanate ; Generation of Vapour Atmospheres ; Inhalation Toxicity ; Threshold Limit Values ; orter: 2-Chloräthylisocyanat ; Erzeugung von Dampf-Luft-Gemischen ; Inhalationstoxicität ; Maximale Arbeitsplatzkonzentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die akute orale Toxicität von 2-Chloräthylisocyanat (CAIC) beträgt 396 mg/kg für männliche Ratten und 630 mg/kg für weibliche Mäuse. Am Kaninchenauge löste die außerordentlich geringe Menge von 5μl CAIC schwere Reizerscheinungen vor allem an der Conjunctiva aus. Auch die irritative Wirkung an der Kaninchenhaut war beträchtlich. In inhalationstoxikologischen Versuchen, deren Methodik durch Beschreibung eines einfachen Verfahrens zur Beladung von Luft ergänzt wurde, erwies sich CAIC als Reizgas ohne erkennbare systemischtoxische Wirkung. Die LC50 für Ratten beträgt bei sechsstündiger Exposition 6,3 ppm. In zwei subakuten Versuchen über 10 Tage mit Konzentrationen von 3,1 und 3,8 ppm überlebten alle Ratten. Zehn Tage nach Versuchsende wurden außer im Respirationstrakt (Tracheobronchitis. Bronchopneumonie) histologisch keine pathologischen Veränderungen gefunden. Es wird eine maximale Arbeitsplatzkonzentration (MAK) von 0,02 ppm vorgeschlagen.
    Notes: Abstract The acute oral toxioity of 2-chloroethyl isocyanate (CAIC) is 396 mg/kg for male rats and 630 mg/kg for female mice. The extremely small quantity of 5 μl CAIC caused severe irritation in the eyes of rabbits, particularly of the conjunctiva. The skin was also affected considerably. Inhalation experiments, involving a new version of a proven method for generating air-vapour mixtures, produced no evidence of systemic toxicity, but let CAIC be classified as an irritant vapour to the respiratory tract. The LC50 for rats is 6.3 ppm after exposure for 6 h, while rats in two experiments involving ten-day exposures to vapour concentrations of 3.1 and 3.8 ppm, respectively, survived. After a fortnight's withdrawal following each experiment, histological examinations showed tracheobronchitis and bronchopneumonia but no pathological change in any other organ examined. A threshold limit value (TLV) of 0.02 ppm is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00316517
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of cubic titanium nitride phases by anodization (1995)
    Springer
    Journal of materials science 14 (1995), S. 1344-1345 
    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/BF00270722
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  • 8
    Electronic Resource
    Electronic Resource
    Das periostale Wachstum, Hauptmittel zur funktionellen Anpassung des Schenkelhals-Schaft-Winkels (CCD-Winkel) (1972)
    Springer
    Archives of orthopaedic and trauma surgery 73 (1972), S. 33-46 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nach konsequenter Untersuchung vieler Coxa valga-Fälle gemäß physikalischen und biologischen Gesetzen sowie morphologischen Standpunkten muß man als Hauptgestalter des Schenkelhals-Schaft-Winkels das periostale Wachstum betrachten und nicht, wie bis jetzt angenommen, das epiphysäre Längenwachstum.
    Notes: Summary Consistent investigation and analysis of cases of “Coxa valga”, as well as careful consideration of biological and physical laws should lead to the conclusion that the formation of the CCD-angle is mainly due to the growth of the bone along its width “growth caused by the periosteum” rather than its elongation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00419069
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  • 9
    Electronic Resource
    Electronic Resource
    Das jahreszeitliche Verteilungsmuster und der Äsungsdruck von Alpensteinbock, Gemse, Rothirsch und Reh in einem begrenzten Gebiet im Oberengadin (1972)
    Springer
    European journal of wildlife research 18 (1972), S. 185-212 
    Details
    ISSN: 1439-0574
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01901868
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  • 10
    Electronic Resource
    Electronic Resource
    The energy calibration of LEP in the 1993 scan (1995)
    Springer
    The European physical journal 66 (1995), S. 567-582 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This report summarizes the procedure for providing the absolute energy calibration of the LEP beams during the energy scan in 1993. The average beam energy around the LEP ring was measured in 25 calibrations with the resonant depolarization technique. The time variation of this average beam energy is well described by a model of the accelerator based on monitored quantities. The absolute calibration of the centre of mass energies of the off-peak points is determined with a precision of 2 parts in 105 resulting in a systematic error on the Z-mass of about 1.4 MeV and on the Z-width of about 1.5 MeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01579631
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