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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 1725-1729 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 3849-3855 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The optical and magneto-optical properties of weakly guiding single-mode buried channel waveguides in substituted yttrium iron garnet have been investigated experimentally. The propagation constant difference Δβ of the two coupled TE and TM modes, which is of particular interest for waveguide isolator application, is found to be strongly dependent on waveguide geometry. Measured results can be explained by the specific growth of the top cladding layer, which occurs into different crystallographic directions around the etched waveguide core. This leads to a local variation of the refractive index, which effects the guidance of light, and to a local variation of birefringence, which effects Δβ. The measured variation of Δβ is shown to be primarily caused by growth induced birefringence. It is demonstrated that Δβ can be controlled to small values at selectable waveguide widths as required for waveguide isolator application simply by an appropriate setting of fabrication parameters.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 682-684 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magneto-optic single-mode buried channel waveguides in substituted yttrium iron garnet suitable for waveguide isolators have been prepared. The channels are fabricated in a three-step procedure: starting with multiple-layer planar single-mode waveguides, rib waveguides are wet etched and then overgrown with top cladding. Such waveguides show mode profiles well matched to that of single mode fibers. In mode conversion experiments, an extinction ratio of 20 dB was obtained. Waveguides coupled to single-mode fibers on both sides showed an overall insertion loss of about 4 dB.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 1302-1304 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: 45° waveguide isolators based on magneto-optic channel waveguides with phase mismatch can be realized simply by choosing a proper orientation of the input polarization. This is demonstrated theoretically by visualizing the magneto-optic mode coupling as "coupling tracks'' on the Poincaré sphere, and is verified experimentally for real waveguides with considerable phase mismatch. More than 30 dB isolation is feasible in practical devices.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 2708-2715 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 84 (1987), S. 323-325 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 99 (1990), S. 616-620 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron 41 (1985), S. 2927-2932 
    ISSN: 0040-4020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 329 (1971), S. 473-474 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Früagnose des primären Hyperparathyreoidismus ist wegen der mannigfaltigen Symptome sehr schwierig, da selbst Hypercalcämie und Hypophosphatämie fehlen können. Auch die sekundären ossären oder renalen Veränderungen sind nicht obligat. Sind aber die Kardinalsymptome: Nephrolithiasis und Hypercalcämie nachweisbar, sollte nach einem Hyperparathyreoidismus gesucht werden. In den letzten 6 Jahren wurden an der Chirurgischen Universitätsklinik Mainz 14 Patienten mit primärem Hyperparathyreoidismus ohne postoperative Letalität operiert. Die durchschnittliche Krankheitsdauer bis zur endgültigen Sicherung der Diagnose betrug 5 Jahre, die kürzeste Beobachtungszeit 5 Monate, bei einer akuten Hyperparathyreotoaikose die längste 18 Jahre trotz eindeutiger Brückensymptome (rezidivierende Ulcera, Pankreatitiden, Nierenaffektionen und Nephrolithiasis). Bei der Operation fanden sich 3 eutope und 1 dystopes Adenom. Bei der zweiten, einer 49 Jahre alten Patientin mit uncharakteristischen Symptomen, ergab die Probeexcision einer Anschwellung im Nasenbereich histopathologisch zunächst einen Riesenzelltumor. Osteolytische Prozesse im Skelet bei Hypercalcämie ließen zunächst an eine Metastasierung eines noch unbekannten Neoplasma denken. Die histologische Untersuchung eines osteolytischen Herdes aus der Schädelkalotte ergab dann die ersten Hinweise auf einen primären Hyperparathyreoidismus. Kurz vor der Operation entwickelte sich noch ein deutliches Hypercalcämie- und Psychosyndrom. Bei der Patientin wurde ein 18 g schweres Nebenschilddrüsenadenom entfernt, der Heilverlauf war komplikationsfrei.
    Notes: Summary An early diagnosis of primary hyperparathyreoidism is, in view of the varied symptoms, very difficult, as even hypercalcaemia and hypophosphataemia can be absent. The secondary osseous and renal changes are also not always present. If, however, the cardinal symptoms of nephrolithiasis and hypercalcaemia are present, hyperparathyreoidism should be considered. In the past 6 years 14 patients with primary hyperparathyreoidism were treated at the Surgical University Clinic at Mainz, without any postoperative mortality. The average length of the illness before the diagnosis could be finally confirmed was 5 years; the shortest observation period was 5 months in an acute hyperparathyreotoxicosis, and the longest 18 years, in spite of unequivocal symptoms (recurrent ulcers, pancreatitis, involvement of the kidneys and nephrolithiasis). During the operation we found three eutopic and one dystopic adenoma. In a second operation a 49-year old woman patient with uncharacteristic symptoms, biopsy of a swelling in the nasal region at first showed, histo-pathologically, a giantcell tumour. Osteolytic processes in the skeleton, associated with hypercalcaemia, were first thought to be due to metastases from an unknown neoplasm. The histological examination of an osteolytic focus in the skull produced the first evidence of a primary hyperparathyreoidism. Just before the operation a distinct hypercalcaemia and psychological symptoms developed. An adenoma of the parathyroid gland weighing 18 g was removed. The post-operative course was uneventful.
    Type of Medium: Electronic Resource
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