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Your search keyword '"C. Märkle"' showing total 2 results
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2 results on '"C. Märkle"'

1. Localization of excitons in ultrathin CdS/ZnS quantum structures

Author

W. Petri, C. Märkle, Gerd Bacher, M. Grü, A. Dinger, T. Kümmell, Ulrike Woggon, Michael Hetterich, Claus F. Klingshirn, and Alfred Forchel

Subjects
Photoluminescence, Condensed matter physics, Condensed Matter::Other, Chemistry, Exciton, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Molecular physics, Spectral line, Inorganic Chemistry, Condensed Matter::Materials Science, Quantum dot, Monolayer, Materials Chemistry, Luminescence, Quantum, Quantum well
Abstract

Monolayer fluctuations in ultrathin, coherently strained CdS/ZnS quantum-well structures result in a very strong localization of excitons. The deepest localized excitons can be considered as individual, decoupled and three-dimensionally confined. Consequently, the optical properties can be well explained by transitions from an ensemble of spatially distributed, quasi-zero-dimensional excitonic states. The efficient photoluminescence (PL) and the optical gain in the deep-blue spectral range exhibit unusually broad and unstructured spectra. In μ-PL measurements of a mesa-etched SQW sample (10 μm × 10 μm mesas down to 100 nm × 100 nm mesas) single, ultranarrow luminescence lines can be resolved when the number of luminescing states is reduced.

Published
1998

2. Integrated nuclear fluorescence and expression of hormone-binding sites in malignant pleural effusions.

Author

Kayser K, Märkle C, Kugler C, Andre S, Schüring MP, Zeng FY, and Gabius HJ

Subjects
Aged, Binding Sites, Cell Nucleus metabolism, DNA metabolism, Female, Fluorescent Antibody Technique, Humans, Image Processing, Computer-Assisted, Indoles metabolism, Male, Middle Aged, Pleural Effusion, Malignant mortality, Pleural Effusion, Malignant pathology, Prognosis, Prospective Studies, Survival Analysis, Xanthenes metabolism, Estradiol metabolism, Pleural Effusion, Malignant metabolism, Progesterone metabolism, Testosterone metabolism
Abstract

Objective: To investigate potential disease- and prognosis-associated nuclear and cellular features from cell properties in a prospective study on malignant pleural effusions., Study Design: Integrated nuclear fluorescence and the expression of binding capacities of carrier-immobilized estradiol, progesterone and testosterone; and of labeled sarcolectin; and the presence of calcyclin were measured in 50 cases with proven malignant pleural effusions (10 mesotheliomas, 40 metastasizing tumors). A double fluorescence technique using the fluorochrome DAPI and a Texas Red-based avidin-biotin detection system were applied. Detailed clinical data, including the follow-up for up to 40 months, were included., Results: Pleural effusions in all patients with mesotheliomas occurred prior to (9/10) or at the time of histologic confirmation. Mesotheliomas had the highest tumor cell fraction (12.4%) in S phase and breast carcinomas the lowest (10.7%). More than 80% of malignant cells expressed binding capacities for the applied probes. A statistically significant correlation was noted between the S-phase-related tumor cell fraction and the expression of progesterone receptors. Survival was associated with tumor origin, treatment by pleurodesis, and certain cytometric and histochemical features., Conclusion: The immunofluorescence double-staining technique can be applied successfully in malignant effusions to combine DNA measurements with those of immunohistochemical and ligand histochemical reactivity.

Published
2000

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