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  • 1
    Digitale Medien
    Digitale Medien
    Optical and thermal analyses on multilayered thin films of a phase-change optical recording disk (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 1045-1050 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A computer simulation method to study a laser-induced transient temperature profile of a multilayered phase-change optical recording disk (PCORD) has been developed. The simulation program consists of two parts. One part is an optical analysis program based on the optical characteristic matrix method, and the other is a thermal analysis program based on the finite-element method. A new estimation method for thermal conductivity of recording films was proposed. The estimated thermal conductivity of the thin-film recording media was found to be 50% lower than that of the bulk. Reflectivity, absorbance, and temperature values obtained with this simulation method were compared with those measured by a spectrophotometer and an infrared radiation thermometer when the samples were irradiated in an Ar+ laser beam. The accuracy using this simulator was within 8% for reflectivity and absorbance and within 10% for temperature. A method of optimizing the laser-absorbing layer was studied. With this method simulations showed that the PCORD had a maximum contrast ratio and minimum recording time when thickness, thermal conductivity, and complex refractive index of the laser-absorbing film were 60 nm, 4.2×10−3 W/cm °C, and 2.6−i⋅0.0, respectively. This simulation could provide better film designs for PCORDs and the other optical disks of heat mode recording.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.344456
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  • 2
    Digitale Medien
    Digitale Medien
    Observation of collision-induced-dipole absorption bands in strontium–rare-gas mixtures. I. The 5s–4d bands (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 4495-4498 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Reduced absorption coefficients have been measured for the collision-induced-dipole (CID) absorption bands associated with the 5s–4d transition of atomic strontium perturbed by He, Ne, Ar, Kr, Xe, and Sr. The main CID absorption band, assigned to 5sΣ–4dΣ, extends from the position of the atomic 5s–4d transition towards the shorter-wavelength side for every perturber. For Xe and Kr, an additional small absorption band is seen at the foot of the atomic 5s–4d transition. The former 5sΣ–4dΣ band is interpreted to result from collisional mixing of the 5p state of atomic Sr into the molecular 4dΣ state for small internuclear separations, while the latter band is interpreted to result from the collisional quadrupole (strontium)–dipole (Xe or Kr) interaction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.456787
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  • 3
    Digitale Medien
    Digitale Medien
    Observation of collision-induced-dipole absorption bands in strontium–rare-gas mixtures. II. Bands involving high-lying states (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 4499-4503 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: We have observed many collision-induced-dipole (CID) absorption bands arising from the transitions between quasimolecular ground and high-lying (n≤10) states in the strontium–rare-gas systems. For each absorption band, we have measured the energy shift of the absorption peak from the energy of the correlating atomic forbidden transition and the effective oscillator strength per unit perturber density fCID/Np. The shift is roughly proportional to the electron scattering length L0 for each rare-gas atom, whereas the fCID/Np is roughly proportional to L20. The shift decreases in general as the principal quantum number n increases, and increases as one goes from the s state to the d state, and to the degenerate manifold state with l≥3. These general features of the shift and fCID/Np are consistent with the predictions by a simple Fermi-potential model, suggesting the important role of the interaction between a Rydberg electron and a rare-gas atom in the CID absorption processes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.456788
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  • 4
    Digitale Medien
    Digitale Medien
    High-resolution time-of-flight methods for studies on ionic fragmentation of molecules : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2193-2196 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The design and operation of the time-of-flight (TOF) mass spectrometer developed for ionic photofragmentation studies of molecules is described. Characteristics are summarized for three different operation modes of the TOF spectrometer; a pulse mode, a photoelectron–photoion coincidence mode, and a photoion–photoion coincidence mode. Experimental results for SiH4 are demonstrated as an example for the performance of the apparatus.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1140819
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  • 5
    Digitale Medien
    Digitale Medien
    Non-Hodgkin lymphoma of the skin excluding mycosis fungoides and cutaneous involvement of adult T-cell leukemia/lymphoma (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 15 (1988), S. 0 
    Details
    ISSN: 1600-0560
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Forty-nine cases of cutaneous malignant lymphoma were reviewed in order to analyze the clinicopathological features of these neoplasms. Excluding 13 cases of mycosis fungoides and 4 cases of cutaneous involvement of proven adult T-cell lymphoma/leukemia, the remaining 32 cases were further classified according to their pathological and clinical features. There were 12 primary cutaneous lymphomas, 15 cases of secondary cutaneous involvement of systemic lymphoma, and 5 cases of concurrent skin and lymph node involvement. Histologically, large cell lymphoma predominated in both primary and secondary cutaneous lymphomas. Immunohistochemical study using monoclonal antibodies reactive with B- and T-cells in paraffin sections revealed the cellular lineage in 30 cases. Nineteen cases were of T-cell origin and 11 cases were of B-cell derivation. The prognosis of these patients was rather poor; 25 patients died within 5 years. The predominance of T-cell lymphoma contrasts with a higher frequency of cutaneous B-cell lymphoma in Western countries. As the clinicopathological features of cutaneous lymphomas are diverse, it is suggested that cutaneous lymphomas should be classified and studied in a similar way to their nodal counterparts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0560.1988.tb00543.x
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  • 6
    Digitale Medien
    Digitale Medien
    Generalized eruptive histiocytoma: an ultrastructural study (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 14 (1987), S. 0 
    Details
    ISSN: 1600-0560
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: A case of generalized eruptive histiocytoma (GEH) was evaluated and examined histopathologically and ultrastructurally. A 24-year-old male had an episode of high fever and drug-induced eruption prior to the appearance of multiple skin lesions. Uniform, red to dark-red papular lesions appeared on his cheeks and then became generalized. The lesions were composed of a massive dermal infiltrate of histiocytes, which had oval nuclei and amphophilic cytoplasm. The cytoplasm contained unique annular structures, myeloid bodies and vacuoles. The specificity of these structures is as yet unknown. Reactive stimulation rather than neoplastic proliferation may be a causative factor in GEH.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0560.1987.tb00480.x
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  • 7
    Digitale Medien
    Digitale Medien
    Ultrastructural study of macromelanosomes in a unique case of spindle and epithelioid cell nevus (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 14 (1987), S. 0 
    Details
    ISSN: 1600-0560
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Macromelanosomes in a spindle and epithelioid cell nevus, which occurred in the electron beam-damaged skin of a woman with mycosis fungoides, were ultrastructurally investigated. The melanosomes in the spindle and epithelioid cells were varied in size but uniformly spherical in shape and composed of a core and cortex structure. Electron-lucent bodies were observed in the small melanosomes as well as in the macromelanosomes. Positive dopaoxidase reaction was revealed on the cortex of these melanosomes and partly on their electron-lucent bodies. The electron-lucent bodies were not vesicular structures but were aggregates of filamentous elements, which had a continuity with fibrous structures in the melanosome cortex. It is concluded that the electron-lucent bodies may be one of the matrices of melanization. Anomalously large accumulations of these bodies and concentrical melanization seem to lead to the formation of macromelanosomes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0560.1987.tb00128.x
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  • 8
    Digitale Medien
    Digitale Medien
    Variation of the distribution pattern of SH groups and SS linkages in the human epidermis (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 13 (1986), S. 0 
    Details
    ISSN: 1600-0560
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Normal epidermis of various sites of human body was examined by N-(7-dimethyl-amino-4-methyl-3-coumarinyl)maleimidc (DACM) method for SH groups and SS linkages. The horny cells in the palm and sole showed a gradual occurrence of a SH membranous pattern, while those in other sites revealed an abrupt formation of the SH membranous pattern just above the granular layer. In the palm and sole epidermis the number of layers which exhibit membranous pattern of SH-positivity was thicker than that in the other epidermis; the low- through mid-layers of horny cells in the former sites seemed to contain not only SS-positive but also SH-positive substance at cell peripheries. The DACM staining for SS linkages showed the presence of a granular fluorescence in the cytoplasm of the granular cells of the epidermis in the human palm and sole, but not in other sites. The granular cells in human lip displayed a granular fluorescence in the cytoplasm by cither SH or SS DACM staining. All the SH- or SS-positive granular fluorescence was related to keratohyaline granules. These findings indicate that there may be some variations of the distribution pattern of the epidermal cellular proteins with SH and/or SS and a difference in chemical composition of keratohyaline granules between different anatomical sites of human body.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0560.1986.tb01524.x
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  • 9
    Digitale Medien
    Digitale Medien
    Paralytic shellfish poison in the “hiogi” scallop Chlamys nobilis (1988)
    Springer
    Marine biology 98 (1988), S. 243-246 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Attempts were made to analyze the toxin composition of the toxic “hiogi” scallop Chlamys nobilis. The toxins were partially purified from the digestive glands by column chromatography using Bio-Gel P-2 and Bio-Rex 70 (H+ form), resulting in separation into protogonyautoxin (PX), gonyautoxin (GTX) and saxitoxin (STX) fractions. Their total potencies were scored to be 〈100 mouse units (MU), 3200 MU and 3700 MU, respectively. A 5-min hydrolysis with 0.1 N HCl enhanced the potencies of PX and GTX fractions to 450 MU and 12000 MU respectively, whereas no enhancement occurred in the STX fraction at all. Electrophoretic, thin-layer chromatographic and high performance liquid chromatographic analyses demonstrated that the PX fraction consisted mainly of GTX8 and its epimer, the GTX fraction of GTX5, GTX6, along with two unidentified toxins, and the STX fraction exclusively of two unidentified toxins. This rather unique composition suggested a complex metabolism of PSP in this species.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00391201
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  • 10
    Digitale Medien
    Digitale Medien
    MR findings of malignant intracranial teratoma in a neonate (1986)
    Springer
    Pediatric radiology 16 (1986), S. 504-505 
    Details
    ISSN: 1432-1998
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Intracranial teratomas are the most common intracranial tumor in newborns. Their clinical symptoms are ambiguous but they have a characteristic pattern of a bulky midline lesion with a solid component, multiple loculated cysts and occasionally calcifications. This pattern is easily evident on cranial MR examination.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02387967
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