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  • 1
    Online Resource
    Online Resource
    Plant Production in Closed Ecosystems : The International Symposium on Plant Production in Closed Ecosystems Held in Narita, Japan, August 26-29 1996. (1997)
    Dordrecht :Springer Netherlands,
    Details
    Keywords: Greenhouse management-Congresses. ; Electronic books.
    Description / Table of Contents: The International Symposium on Plant Production in Closed Ecosystems held in Narita, Japan, August 26-29, 1996.
    Type of Medium: Online Resource
    Pages: 1 online resource (343 pages)
    Edition: 1st ed.
    ISBN: 9789401588898
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6709627
    Language: English
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  • 2
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    Size and number concentration of liquid PSCs Balloon-borne measurements at Ny-Aalesund (1998)
    In:  EPIC3Journal of the meteorological society of japan, 76, pp. 549-560
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 3
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    Distribution of particulate sulfur in the winter Arctic stratosphere: Balloon-borne measurements of particle number concentration (1997)
    In:  EPIC3Proc NIPR Symp Polar Meteorol Glaciol, 11, pp. 138-149
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 4
    Electronic Resource
    Electronic Resource
    Femtosecond pump-probe study of molecular vibronic structures and dynamics of a cyanine dye in solution (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 110 (1999), S. 12070-12081 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Time-resolved pump–probe spectra of 1,1′,3,3,3′,3′-hexamethyl-4,4′,5,5′-dibenzo-2,2′indotricarbocyanine (HDITC), a cyanine dye, in ethylene glycol are obtained using 11 fs and 90 fs duration pulses and analyzed in order to study its potential energy surfaces and vibrational dynamics. Ten oscillatory frequencies ranging from 30 cm−1 to 1400 cm−1 are observed in the 11 fs duration wavelength-resolved pump–probe measurements. They are assigned as fundamental vibrational frequencies of HDITC. The relative displacements of the equilibrium position between electronic excited and ground states along the resolved ten vibrational modes are determined through the wavelength dependence of the oscillatory amplitude. After considering the contributions of the ten vibrational modes, it is found that most of the Stokes shift and the early fast decays of the pump–probe signals are due to relaxation along the low frequency overdamped modes of the chromophore. The overdamped modes are characterized by the 90 fs pump–probe signals with the excitation at the red edge of the absorption band. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.479142
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    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Ab initio calculations of radiationless transitions between excited and ground singlet electronic states of ethylene (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 2044-2055 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: General expressions for internal conversion (IC) rate constant calculations have been derived by taking into account displacements, distortions, and rotation (mixing) of normal modes. The electronic part of the rate constant has been computed through the ab initio calculations of vibronic coupling. The corresponding expressions for the simplest two-mode case as well as for the general n-mode case have been derived. We demonstrate the effect of rotated (mixed) normal modes on the IC rate constants based on a model consisting of one promoting and two mixed modes. The dynamics of excited states of C2H4 has been investigated based on the internal conversion mechanism. The calculated rate of internal conversion show that the lifetimes of the excited π–3p and π–π* states of C2H4 are on the picosecond scale. We predict that if the molecule is excited to a Rydberg π–3p state, it relaxes to the ground state via the cascade mechanism, π–3p→π–3s(1B3u)→π–π*(1B1u)→1Ag. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.475584
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  • 6
    Electronic Resource
    Electronic Resource
    Sensitivity of Bragg surface diffraction to analyze ion-implanted semiconductors (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 71 (1997), S. 2614-2616 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A special case of the x-ray multiple diffraction phenomenon, the Bragg surface diffraction (BSD), has been investigated under lattice damage due to ion implantation in GaAs (001) samples. The BSD profile is very sensitive to the diffraction regime (dynamical or kinematical) and provides information regarding crystalline perfection and lattice strains in both directions—parallel and perpendicular—to the sample surface. Results from grazing-incidence x-ray diffraction and reciprocal space mapping are also reported. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120157
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of temperature on the infrared and sum-frequency generation spectra of adsorbates (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 5920-5927 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The dephasing and energy relaxation contributions to the line width in infrared (IR) and sum-frequency generation (SFG) spectra of adsorbates are derived from the generalized master equation approach. Expression for the line shift is also obtained. The anharmonic interaction between the adsorbate and the substrate is expanded in a polynomial in terms of the adsorbate and phonon coordinates, and the dephasing is shown to be mainly due to two-phonon processes, while two-phonon, three-phonon or four-phonon processes can contribute to energy relaxation, depending on the relative values of the adsorbate vibrational and the phonon frequencies. The temperature-dependence data of the IR absorption for C(111):H is found to be consistent with the theory, and the large line width for C(111):D can be accounted for by the efficient two-phonon energy relaxation process which is not available for C(111):H due to the higher adsorbate vibrational frequency for C(111):H. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473257
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  • 8
    Electronic Resource
    Electronic Resource
    Serum Level of Interleukin-4 in Patients with Perennial Allergic Rhinitis During Allergen-Specific Immunotherapy (1996)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 43 (1996), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Interleukin-4 (IL-4) may play a central role in the IgE synthesis system, the development of Th-2-like cells, and co-ordination as well as the persistence of airway inflammatory process in allergic disorders. Therefore, IL-4 plays a key role in airway allergic disorders. This study aimed at investigating the serum concentrations of IL-4 in patients with perennial allergic rhinitis, with special reference to the possible changes and the clinical relevance following long-term immunotherapy. The study has demonstrated that the serum level of IL-4 in allergic rhinitis patients before immunotherapy is significantly higher than that in non-atopic individuals. However, the serum IL-4 level in allergic rhinitis patients did not decrease following anti-allergic medications but significantly decreased following immunotherapy. The percentage decrease in IL-4 was correlated significantly with the percentage decrease in specific IgE antibodies following long-term immunotherapy. Immunotherapy also significantly decreased specific IgE antibodies, but this reduction in specific IgE antibodies was not significantly correlated with the clinical improvement. In contrast, the percentage decrease in serum IL-4 was significantly correlated with the percentage decrease in symptomatic scores. The authors interpret these data to mean that immunotherapy alters T-cell cytokine profiles in the long-term, and a decline of IL-4 following immunotherapy could modulate not only production of specific IgE antibodies but also inflammatory cellular events, leading to symptomatic relief in allergic rhinitis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3083.1996.d01-269.x
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of mechanical trauma on the tooth germ of rat molars at various developmental stages: a histopathological study (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Dental traumatology 15 (1999), S. 0 
    Details
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— Intrusive trauma was experimentally applied to the tooth germ at different developmental stages in the rat first molar. The tooth germ at the earliest (postnatal day 1, initiating stage of enamel matrix formation) and the latest (postnatal day 10, calcifying stage of preformed enamcl matrix) developmental stages studied showed localized enamel hypoplasia as a direct sequela of trauma. Thc tooth germs in which enamel matrix was rapidly thickening (postnatal days 3, 5, 7) and had not yet started to calcify showed the most intense and extensive injuries to the formation and structural organization of both enamel and dentin. As for indirect effects secondary to trauma, tooth germ dislocation was observed chiefly in tooth germs at the same developmental stages, frequently resulting in ankylosis. The present experimental model may be helpful for clarifying thc histogenesis of traumatic changes in the developing tooth germ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-9657.1999.tb00743.x
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  • 10
    Electronic Resource
    Electronic Resource
    Subcellular and developmental changes in distribution of aconitase isoforms in pumpkin cotyledons (1995)
    Springer
    Planta 195 (1995), S. 464-468 
    Details
    ISSN: 1432-2048
    Keywords: Aconitase ; Cucurbita ; Glyoxylate cycle ; Glyoxysome ; Mitochondrion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The subcellular localization and developmental changes of aconitase (EC 4.2.1.3) isoforms were studied in pumpkin tissues by anion-exchange chromatography. In etiolated pumpkin cotyledons three aconitase isoforms (denoted Aco I, II, and III, respectively) were found, and the first to be eluted (Aco I) represented the major part of the total aconitase activity in the tissue. Aconitase I gradually disappeared during the greening of cotyledons. In hypocotyls, roots and mature leaves Aco I was barely detectable, though the two other isoforms were present. In pumpkin mitochondria purified by differential or density gradient centrifugation, a high amount of Aco II was present, whereas the other isoforms were detected in low quantities. Since aconitase has never been clearly detected in glyoxysomal fractions, we conclude that the first and the third aconitase isoforms are cytosolic, while the second one represents the mitochondrial aconitase. Moreover, the first aconitase isoform is present in appreciable amounts only in etiolated cotyledons, so that it should represent the aconitase isoform involved in the glyoxylate cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202606
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