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  • Springer  (27)
  • American Institute of Physics  (9)
  • American Institute of Physics (AIP)  (4)
  • Oxford University Press  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Characterization of the free-carrier concentrations in doped β-SiC crystals by Raman scattering (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 354-358 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: LO phonon-overdamped plasmon coupled modes in n-type epitaxial films of β-SiC have been measured in the carrier concentration range from 6.9×1016 to 2×1018 cm−3. The carrier concentrations and damping constants are determined by line-shape fitting of the coupled modes and compared with the values derived from Hall measurements. The concentrations obtained from the two methods agree fairly well. The Faust–Henry coefficient determined from the fitting is 0.35. The line-shape analysis of the coupled mode has shown that the dominant scattering mechanisms in β-SiC are deformation-potential and electro-optic mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338830
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  • 2
    Electronic Resource
    Electronic Resource
    Temperature dependence of the band gap in InAsyP1−y (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 2722-2724 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The temperature dependence of the band gap in InAsyP1−y (y=0–0.67) has been determined by photoluminescence, x-ray diffraction, and absorption spectra measurements. We found that the measured data within the temperature range of 77–300 K can be expressed by the equation proposed by O'Donnell and Chen. The band gap at 77 K is given by Eg=1.407−1.073y+0.089y2, while the compositional dependence of the band gap observed at 300 K, agrees with the values previously reported. We confirmed that changes in temperature caused a slight change in the bowing parameters, and hence found that the band gap temperature dependence of InAsyP1−y (y=0–1) varies very little with changes in composition (2.5–3.5×10−4 eV/K). © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126455
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  • 3
    Electronic Resource
    Electronic Resource
    Real-Time Monitoring of Blood–Brain Barrier Disruption Induced by Ultraviolet Laser Irradiation (1998)
    Springer
    Lasers in medical science 13 (1998), S. 172-180 
    Details
    ISSN: 1435-604X
    Keywords: Keywords: Argon laser; Blood–brain barrier; Brain; Evans blue; Guinea-pig; Vasodilation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Ultraviolet laser light of sufficient power can induce focal œdema in the brain. The formation of ultraviolet-induced vasogenic \kdema was monitored by observing real-time changes in the integrity of the blood–brain barrier. The brain surface of guinea-pigs injected with Evans blue was exposed to light from a continuous wave argon laser at 351 nm, delivered via an optical fibre. The integrity of the blood–brain barrier was evaluated by measuring surface reflectance using a separate probing light. The brain was then sectioned and examined using light and electron microscopy. Extravasation of Evans blue following vasodilatation was observed when the irradiation intensity was greater than 0.64 W/cm2. The extent of glial and vascular damage could be correlated with the laser power. Irradiated vascular endothelium exhibited lipping at the tight junction, vacuolation and mitichondrial swelling. These results suggest that disruption of the blood–brain barrier induced by ultraviolet light is preceded by vasodilatation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101030050071
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  • 4
    Electronic Resource
    Electronic Resource
    Inhibitory action of cholecystokinin-pancreozymin on gastric pepsin secretion (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 159-159 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Der Einfluss von Cholecystokinin-Pankrcozymin auf die Sekretion von Pepsin wurde in Hunden mit Heidenhain-Tasche untersucht. Während submaximaler Pepsinstimulation mit Mecholyl verminderte i.v. Injektion von Cholecystokinin-Pankreozymin die Pepsin-Sekretion im Magen signifikant. Es wird vermutet, dass CCK-PZ Enterogastrone sein könnte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01895553
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  • 5
    Electronic Resource
    Electronic Resource
    Energy efficiency in the multi-stage laser separation of13C by an elimination method (1983)
    Springer
    Applied physics 30 (1983), S. 143-148 
    Details
    ISSN: 1432-0649
    Keywords: 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energy efficiency has been discussed in the multi-stage laser separation of13C in the ir laser photolysis of CF3I. The comparison has been made between the two methods, i.e., the photolysis of13C molecules (ordinary method) and the photolysis of12C molecules (elimination method). The former recycles the photolyzed product after the regeneration of feed molecules, while the latter recycles the residue after the elimination of the photolyzed product. The analysis of the energy consumption using theoretical models has shown that the elimination method consumes more energy, but the difference is far less than expected; the overall energy consumption may reach the same level at a lower pressure according to our estimation which includes the factors of the quantum efficiency for the dissociation, the energy difference between the laser lines and the material loss for the regeneration. It may imply that the elimination method is more favored in a practical application because it is free from the regeneration procedure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695469
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  • 6
    Electronic Resource
    Electronic Resource
    Xanthumin and 8-epi-xanthatin as insect development inhibitors fromXanthium canadense Mill. (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1294-1295 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Two insect development inhibitors againstDrosophila melanogaster have been isolated from the leaves ofX. canadense and identified as xanthumin and 8-epi-xanthatin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01963966
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  • 7
    Electronic Resource
    Electronic Resource
    Stimulatory action of secretin on gastric pepsin secretion (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 689-690 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Der Einfluss von Sekretin und Pankreozymin auf die Sekretion von Pepsin wurde in Hunden mit Heidenhain-Tasche untersucht. Die Hormone wurden ohne Narkose i.v. eingegeben. In allen Tieren verursachte Sekretin eine Steigerung der Pepsin-Sekretion im Magen; aber Pankreozymin hatte keinen Effekt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138315
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  • 8
    Electronic Resource
    Electronic Resource
    Does pentagastrin suppress secretin induced pepsin secretion in Heidenhain pouch Dogs? (1975)
    Springer
    Cellular and molecular life sciences 31 (1975), S. 821-822 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Secretin-stimulated pepsin secretion from Heidenhain pouches was significantly depressed by concomitant pentagastrin. Pentagastrin by itself was without effect on pouch pepsin. Methacholine, on the other hand, did not antagonize secretin-stimulated pouch pepsin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01938485
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  • 9
    Electronic Resource
    Electronic Resource
    Pancreozymin/cholecystokinin a physiological mediator of gastric secretory inhibition of duodenal origin (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 570-571 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé La Pancréozymine-cholécystokinine (PZ) augmente la sécrétion de l'acide gastrique stimulée par la méthacholine, mais diminue la réponse acide à la gastrine pentapeptide. L'acidification de l'anse Thiry-Vella du duodénum fait augmenter pareillement la sécrétion acide de la poche d'Heidenhain stimulée par la méthacholine et la diminue quand le stimulant est de la gastrine pentopeptide. Il est bien connu que l'acidification du duodénum libère le PZ de la muqueuse duodénale. Nos résultats suggèrent que le PZ est l'agent médiateur d'abaissement de l'acidité gastrique après acidification du duodénum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02153778
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  • 10
    Electronic Resource
    Electronic Resource
    Integrable chain of electrons coupled with squeezed phonons (1996)
    Springer
    JETP letters 64 (1996), S. 148-154 
    Details
    ISSN: 1090-6487
    Keywords: 63.20.Kr ; 63.22.+m ; 71.10.−w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The exact wave function for a one-dimensional chain of electrons coupled with squeezed phonons is obtained. The ground state energy and the gap in the electron spectrum are calculated. It is shown that there exists an optimal phonon number n ph≠0 for the ground state of the system. The results are generalized for a system of correlated electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567166
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