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  • Springer  (40)
  • 1990-1994  (27)
  • 1955-1959  (13)
  • 1
    Electronic Resource
    Electronic Resource
    Thepp- $$p\bar p$$ difference and the behaviour of phases at high energies (1991)
    Springer
    The European physical journal 51 (1991), S. 706-706 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01565599
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  • 2
    Electronic Resource
    Electronic Resource
    Plasma-mediated ablation of brain tissue with picosecond laser pulses (1994)
    Springer
    Applied physics 58 (1994), S. 493-499 
    Details
    ISSN: 1432-0649
    Keywords: 87.50.Hj ; 42.55.Rz ; 87.90.+y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Plasma-mediated ablations of brain tissue have been performed using picosecond laser pulses obtained from a Nd:YLF oscillator/regenerative amplifier system. The laser pulses had a pulse duration of 35 ps at a wavelength of 1.053 µm. The pulse energy varied from 90 µJ to 550 µJ at a repetition rate of 400 Hz. The energy density at the ablation threshold was measured to be 20 J/cm2. Comparisons have been made to 19 ps laser pulses at 1.68 µm and 2.92 µm from an OPG/OPA system and to microsecond pulse trains at 2.94 µm from a free running Er:YAG laser. Light microscopy and scanning electron microscopy were performed to judge the depth and the quality of the ablated cavities. No thermal damage was induced by either of the picosecond laser systems. The Er:YAG laser, on the other hand, showed 20 µm wide lateral damage zones due to the longer pulse durations and the higher pulse energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081080
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  • 3
    Electronic Resource
    Electronic Resource
    Zum Problem der Partner bei der Flammenspektrometrie (1956)
    Springer
    Microchimica acta 44 (1956), S. 353-361 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Flame photometry, an excellent micromethod particularly for mixtures of alkalis, demands the most careful consideration of the influence of cosolutes (partners) if quantitative data are demanded. In addition to secondary interferences (foreign light, alteration of the atomizing conditions) which are readily eliminated, real interferences occur because of the influence of dissociation and ionization in the flame. The great influence of the temperature and the concentration of the solution on the error arising from the cosolutes is discussed.
    Abstract: Résumé La photométrie de flamme est une excellente microméthode, particulièrement pour les mélanges d'alcalis; mais elle demande une étude très soignée de l'influence des autres substances dissoutes si l'on désire obtenir des données quantitatives précises. En plus d'interférences secondaires (lumière parasite, modification des conditions de vaporisation) qui sont aisément éliminées, des interférences réelles proviennent de la dissociation et de l'ionisation dans la flamme. On discute l'influence importante de la température et de la concentration de la solution sur l'erreur correspondant à l'influence des corps dissouts.
    Notes: Zusammenfassung Die Flammenspektrometrie— eine ausgezeichnete Mikromethode insbesondere für Gemische von Alkalien — erfordert bei quantitativen Aussagen die sorgfältige Berücksichtigung des Einflusses der Lösungsgenossen (Partner). Neben sekundären Störungen (Fremdlicht, Änderung der Zerstäubungsbedingungen), die sich weitgehend ausschalten lassen, treten durch Beeinflussung der Dissoziation und Ionisation in der Flamme echte Störungen auf. Es wird der große Einfluß der Temperatur und der Lösungskonzentration auf die durch Partner bedingten Fehler behandelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216621
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanism of chlorpromazine binding by Gram-positive and Gram-negative bacteria (1992)
    Springer
    Antonie van Leeuwenhoek 62 (1992), S. 309-314 
    Details
    ISSN: 1572-9699
    Keywords: chlorpromazine ; xanthene dyes ; charge-transfer complexes ; birefringence ; Gram-positive and Gram-negative cell wall stain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chlorpromazine forms charge-transfer complexes with xanthene dyes in bacteria. These complexes permit the differentiation of Gram-positive and Gram-negative bacteria in both light and polarization microscopy. The birefringence induced by the charge-transfer complex might explain the molecular basis of bacterial staining. The charge-transfer complexes formed between chorpromazine and xanthene dyes accumulate in the bacterial cell, mainly inside the bacterial cell wall. The complexes give the cells a color, which depends on the chemical composition of the staining structure, and in particular the polysaccharides of the cell wall in bacteria. Metachromatic granules were seen inside Gram-positive bacteria after chlorpromazine and rose bengal staining. Although the nature of these granules remains unclear, this type of binding may have a role in the inhibition of biochemical processes in the bacterial cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00572599
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  • 5
    Electronic Resource
    Electronic Resource
    Die einheiten der elektrischen Ladung und der Versuch von Kohlrausch und Weber (1957)
    Springer
    Electrical engineering 43 (1957), S. 212-215 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01407552
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  • 6
    Electronic Resource
    Electronic Resource
    Die nachbildung von Magnetisierungskurven durch einfache algebraische oder transzendente Funktionen (1956)
    Springer
    Electrical engineering 42 (1956), S. 286-299 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01407417
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  • 7
    Electronic Resource
    Electronic Resource
    Investigation of self-organizing thiol films by optical second harmonic generation and X-ray photoelectron spectroscopy (1991)
    Springer
    Applied physics 53 (1991), S. 552-556 
    Details
    ISSN: 1432-0630
    Keywords: 68.45-v ; 68.45 Da ; 82.65-i
    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 adsorption of self-organizing thiol films on polycrystalline gold substrates was investigated in situ by optical second harmonic generation. Growth of the films could be detected at submonolayer coverage. For a comparison with classical surface analytical methods the thiol coverage was measured ex situ by X-ray photoelectron spectroscopy. We find that formation of ordered thiol films up to monolayer coverage can be described by Langmuir adsorption kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331545
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  • 8
    Electronic Resource
    Electronic Resource
    Pseudo-epitaxial C60 films prepared by a hot-wall method (1993)
    Springer
    Applied physics 56 (1993), S. 193-196 
    Details
    ISSN: 1432-0630
    Keywords: 68.55.−a ; 81.15.Ef
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have used both reflection-geometry and grazing-incidence-geometry X-ray scattering to study thin films of C60 evaporated onto mica substrates via a hot-wall technique. The growth mode yields close-packed C60 planes, which are parallel to the substrate surface and which exhibit out-of-plane correlation lengths of 850 Å. In the film plane the C60 is at best pseudo-epitaxial, with a 0.9° distribution of crystallite orientations, a 450 Å in-plane correlation length, and a 3.7% lattice mismatch, better than obtained by other thin film techniques but far from the accepted definition of single crystal thin film epitaxy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539473
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  • 9
    Electronic Resource
    Electronic Resource
    Calcitonin gene-related peptide (CGRP) causes redistribution of blood flow in humans (1990)
    Springer
    European journal of clinical pharmacology 39 (1990), S. 491-494 
    Details
    ISSN: 1432-1041
    Keywords: blood flow ; calcitonin ; calcitonin gene-related peptide ; duplex-scan ; laser Doppler ; healthy volunteers ; cerebral blood flow ; skin blood flow ; intestinal blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In normal human subjects (n=6), blood flow in the common carotid artery, assessed with an ultrasonic duplex-scanning unit, was increased up to 152% of basal levels by 60-min infusions of human calcintonin gene-related peptide I (αCGRP) 80 pmol·kg−1·h−1, but it was not affected by 20 pmol·kg−1·h−1 CGRP or 88 pmol·kg1·h−1 human calcitonin. In the superior mesenteric artery, on the other hand, blood flow was reduced by 80 pmol·kg−1·h−1 CGRP to 58% of the basal level, but not by 20 pmol·kg−1·h−1 CGRP or with 88 pmol·kg−1·h−1 calcitonin. Blood flow in the abdominal aorta remained largely unchanged under the same conditions. Skin blood flow, assessed by a laser Doppler unit, was increased up to 682% of the basal level by 80 pmol·kg−1·h−1 CGRP, but not by 20 pmol·kg−1·h−1 CGRP or calcitonin. Thus CGRP increased regional blood flow to the brain and the skin at the expense of the gastrointestinal tract.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00280942
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  • 10
    Electronic Resource
    Electronic Resource
    Intracolonic bioavailability of human calcitonin in man (1992)
    Springer
    European journal of clinical pharmacology 43 (1992), S. 527-531 
    Details
    ISSN: 1432-1041
    Keywords: Calcitonin ; Colonic administration ; Bioavailability ; pharmacokinetics ; pharmacodynamics ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Human calcitonin (hCT) injected into the lumen of the descending colon of normal human subjects was absorbed within minutes and could be recognized intact in plasma as shown by RIA in combination with reverse-phase HPLC. The absorption was low and variable, with bioavailabilities ranging from 0.01% to 2.7% relative to intravenously administered hCT (area under the concentrationtime curve). With intravenous hCT serum calcium was lowered and the fractional urinary excretion of calcium, phosphorus, sodium and chloride was significantly stimulated. With the intracolonic hCT, the fractional urinary excretions of calcium, sodium and chloride were also marginally stimulated relative to intracolonic vehicle (placebo). In conclusion, hCT is absorbed intact from the colon, but the bioavailability is low and highly variable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02285096
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