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  • 1
    Online Resource
    Online Resource
    Semiconductor Cavity Quantum Electrodynamics. (2000)
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Details
    Keywords: Quantum electrodynamics. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (163 pages)
    Edition: 1st ed.
    ISBN: 9783540455158
    Series Statement: Springer Tracts in Modern Physics Series ; v.169
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=3073191
    DDC: 530.1433
    Language: English
    Note: Springer Tracts in Modern Physics Volume 169 -- Semiconductor Cavity Quantum Electrodynamics -- Copyright -- Preface -- Contents -- 1. Introduction -- 2. Microcavity Exciton Polaritons -- 3. Biexcitonic Effects in Microcavities -- 4. Resonant Tunneling into Exciton and Polariton States -- 5. Competition Between Photon Lasing and Exciton Lasing -- 6. Polariton Dynamics in Photoluminescence -- 7. Stimulated Emission of Exciton Polaritons -- References -- Index.
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    GEOMAR EBL
  • 2
    Electronic Resource
    Electronic Resource
    Isolation of photosystem II reaction center complex by affinity chromatography with the peripheral 33-kDa polypeptide as ligand
    Amsterdam : Elsevier
    FEBS Letters 224 (1987), S. 71-74 
    Details
    ISSN: 0014-5793
    Keywords: 33 kDa polypeptide ; Affinity chromatography ; Oxygen evolution ; Photosynthesis ; Photosystem II ; Reaction center
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(87)80424-6
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Low-temperature magnetic properties of pelagic carbonates: Oxidation of biogenic magnetite and identification of magnetosome chains (2014)
    American Geophysical Union
    Details
    Publication Date: 2021-02-17
    Description: Pelagic marine carbonates provide important records of past environmental change. We carried out detailed low-temperature magnetic measurements on biogenic magnetite-bearing sediments from the Southern Ocean (Ocean Drilling Program (ODP) Holes 738B, 738C, 689D, and 690C) and on samples containing whole magnetotactic bacteria cells. We document a range of low-temperature magnetic properties, including reversible humped low-temperature cycling (LTC) curves. Different degrees of magnetite oxidation are considered to be responsible for the observed variable shapes of LTC curves. A dipole spring mechanism in magnetosome chains is introduced to explain reversible LTC curves. This dipole spring mechanism is proposed to result from the uniaxial anisotropy that originates from the chain arrangement of biogenic magnetite, similar to published results for uniaxial stable single domain (SD) particles. The dipole spring mechanism reversibly restores the remanence during warming in LTC measurements. This supports a previous idea that remanence of magnetosome chains is completely reversible during LTC experiments. We suggest that this magnetic fingerprint is a diagnostic indicator for intact magnetosome chains, although the presence of isolated uniaxial stable SD particles and magnetically interacting particles can complicate this test. Magnetic measurements through the Eocene section of ODP Hole 738B reveal an interval with distinct magnetic properties that we interpret to originate from less oxidized biogenic magnetite and enrichment of a biogenic “hard” component. Co-occurrence of these two magnetic fingerprints during the late Eocene in the Southern Ocean indicates less oxic conditions, probably due to increased oceanic primary productivity and organic carbon burial.
    Description: Published
    Description: 6049–6065
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: restricted
    Keywords: pelagic carbonates ; biogenic magnetite ; rock magnetism ; environmental magnetism ; ODP ; 04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transport ; 04. Solid Earth::04.05. Geomagnetism::04.05.09. Environmental magnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    PAPER (OA)
  • 4
    Electronic Resource
    Electronic Resource
    Low-temperature epitaxial growth of cerium dioxide layers on (111) silicon substrates (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 8313-8315 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The temperature dependence of the epitaxial growth of cerium dioxide (CeO2) layers on (111) silicon substrates was studied using ultra-high-vacuum evaporation, varying the substrate temperature in the range between 150 and 900 °C. Characterization using Rutherford backscattering spectrometry and reflection high-energy electron diffraction proved that a CeO2 layer on (111) silicon has considerably good crystalline quality in the range between 200 and 850 °C. It is clarified that the epitaxy can be attained even at surprisingly low temperatures (less than 200 °C). A substrate temperature above 850 °C leads to rather poor crystallinity due to an exponential increase of residual gas pressure. Refractive indices of the epitaxial layers were measured by ellipsometry to be in the range of 2.19–2.79.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347442
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of Acute Fluoxetine Treatment on the Brain Serotonin Synthesis as Measured by the α-Methyl-l-Tryptophan Autoradiographic Method (1995)
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 65 (1995), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The effect of treatment with acute fluoxetine, a serotonin reuptake inhibitor, on the rate of serotonin synthesis in the rat brain was studied through autoradiography following intravenous administration of α-methyl-l-[3H]tryptophan. The rate of serotonin synthesis in fluoxetine-treated rats was compared with the rate measured in sham-treated rats (saline injection). Results showed a significant increase in the rate of synthesis in the majority of cerebral structures examined. The greatest increase (given as a percentage of rates in control animals) in the rate of serotonin synthesis was observed in the substantia nigra compacta (344%), hippocampus-CA3 (337%), dorsal hippocampus (283%), and caudate-putamen (232%). Fluoxetine had a less significant effect on the rate of synthesis in the pineal body (44%). Data suggest that acute fluoxetine treatment (30 mg/kg, i.p.) enhances the rate of serotonin synthesis in all the structures of rat brain examined in this work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1471-4159.1995.65010250.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Serotonin Synthesis Rate Measured in Living Dog Brain by Positron Emission Tomography (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 56 (1991), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: In vivo measurements by positron emission tomography of the brain serotonin synthesis rates in the normal dog, in the dog with increased plasma tryptophan concentration, and in the dog under different arterial oxygen tensions are described. The method described here permits repeated measurements in the same brain for the first time. An increase in the plasma tryptophan concentration from 16.6 to 191.5 and then to 381 μM resulted in close to a linear increase in the brain serotonin synthesis rate. When PaO2 was raised from 76 ± 2 to 106 ± 1 mm Hg, the rate of serotonin synthesis in the dog brain increased from 39 ± 8 to 54 ± 10 pmol g−1 min−1. The estimates of the Michaelis-Menten constants, Kappm and Vmax for the transport of tryptophan through the blood-brain barrier are 303 ± 54 μM and 63 ± 10 nmol g−1, min−1, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1991.tb02575.x
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Angio-oedema in a neonate with IgG antibodies to parvovirus B19 following intrauterine parvovirus B19 infection (2000)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 143 (2000), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We report a neonate with angio-oedema following fetal hydrops caused by maternal parvovirus B19 infection. Levels of complement components, including total haemolytic complement activity and C1 inhibitor concentration, were within normal ranges in cord blood. Neonatal angio-oedema might be included in the clinical spectrum of parvovirus B19 infection in pregnancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2000.03676.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Development of systemic sclerosis in a patient with systemic lupus erythematosus and topoisomerase I antibody (2000)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 142 (2000), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We describe a patient with systemic lupus erythematosus (SLE) associated with topoisomerase I (topo I, Scl-70) antibody, a specific marker for systemic sclerosis (SSc). SSc patients who produce this antibody have severe cutaneous and visceral involvement, and eventually have a poor prognosis. It is rare to find this antibody in patients with other collagen diseases. Only four SLE patients have been reported in the English language literature who were topo I antibody-positive but had no clinical evidence of scleroderma. The serum of our patient with SLE had precipitating topo I antibody from the onset of his disease. Twelve years after the onset of SLE, he developed proximal scleroderma and pulmonary fibrosis. This case reconfirms the prognostic significance of topo I antibody as a predictive marker, and indicates that SLE patients with topo I antibody require careful follow-up for future development of scleroderma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2000.03492.x
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Late development of antidesmoglein 1 antibodies in pemphigus vulgaris: correlation with disease progression (1999)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 141 (1999), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The coexistence of antidesmoglein 3 (Dsg3) and antidesmoglein 1 (Dsg1) autoantibodies is well described in patients with pemphigus vulgaris (PV); however, there is little evidence of sequential development of these two autoantibodies. Autoantibody responses to Dsg3 and Dsg1 were studied in seven PV patients over time by enzyme-linked immunosorbent assay, using baculovirus expressed recombinant fusion proteins. All patients had anti-Dsg3 IgG antibodies at presentation. Two patients developed anti-Dsg1 later in the course of the disease. The transition in autoantibody profile was associated with disease progression to generalized PV involving mucous membranes and skin in both patients; one patient initially presented with a predominantly mucosal phenotype, the other with herpetiform pemphigus-like features. These findings demonstrate that there is an extension of autoimmune response from anti-Dsg3 only to both anti-Dsg3 and anti-Dsg1 in some patients, which is associated with an alteration in clinical expression in PV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.1999.03209.x
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  • 10
    Electronic Resource
    Electronic Resource
    High powers and subpicosecond pulses from an external-cavity surface-emitting InGaAs/InP multiple quantum well laser (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 807-809 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We demonstrate that surface-emitting lasers operating in an external cavity can produce high average powers, high peak powers, and ultrashort pulses. By optical pumping of InGaAs/InP multiple quantum well samples in an external cavity, we generated 190 mW both in continuous and mode-locked operation at 1.5 μm. Synchronous pumping at 100 MHz yielded 7.7 ps pulses with 15 mW average power. These were shortened to 1. 1 ps pulses with 64 W peak power by chirp compensation using diffraction gratings, and to 710 fs by negative group-velocity dispersion in an optical fiber.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104495
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