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  • 1
    Electronic Resource
    Electronic Resource
    Phylogenetic relationship of the green alga Nanochlorum eukaryotum deduced from its chloroplast rRNA sequences (1995)
    Springer
    Journal of molecular evolution 40 (1995), S. 428-442 
    Details
    ISSN: 1432-1432
    Keywords: Algal phylogeny ; Chloroplast phylogeny ; Large-subunit rRNA ; Nanochlorum eukaryotum ; rRNA secondary structure ; Small-subunit rRNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The marine green coccoidal alga Nanochlorum eukaryotum (N.e.) is of small size with an average diameter of 1.5 μm. It is characterized by primitive-appearing biochemical and morphological properties, which are considerably different from those of other green algae. Thus, it has been proposed that N.e. may be an early developed algal form. To prove this hypothesis, DNA of N.e. was isolated by a phenol extraction procedure, and the chloroplast DNA separated by preparative CsCl density-gradient centrifugation. The kinetic complexity of the nuclear and of the chloroplast DNA was evaluated by reassociation kinetics to 3 × 107 by and 9 × 104 bp, respectively. Several chloroplast genes, including the rRNA genes, were cloned on distinct fragments. The order of the rRNA genes corresponds to the common prokaryotic pattern. The 16S rRNA gene comprises 1,548 bases and is separated from the 23S rRNA gene with its 2,920 bases by a short spacer of 460 bases, which also includes the tRNAIle and tRNAAla genes. The 5S rRNA gene has not been found; it must start further than 500 bases downstream from the 3′-end of the 23S rRNA gene. From the chloroplast rRNA sequences, we have deduced secondary structures of the 16S and 23S rRNAs, which are in agreement with standard models. The rRNA sequences were aligned with corresponding chloroplast sequences; phylogenetic relationships were calculated by several methods. From these calculations, we conclude that N.e. is most closely related to Chlorella vulgaris. Therefore, N.e. does not represent an early developed algal species; the primitive-appearing morphological and biochemical characteristics of N.e. must rather be explained by secondary losses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164029
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  • 2
    Electronic Resource
    Electronic Resource
    Deep trenches in silicon using photoresist as a mask
    Amsterdam : Elsevier
    Sensors and Actuators A: Physical 37-38 (1993), S. 766-771 
    Details
    ISSN: 0924-4247
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0924-4247(93)80129-5
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  • 3
    Electronic Resource
    Electronic Resource
    Resin probe analysis - II. Amino acid coupling reactions
    Amsterdam : Elsevier
    Analytical Biochemistry 67 (1975), S. 182-191 
    Details
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(75)90285-7
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  • 4
    Electronic Resource
    Electronic Resource
    Growth morphology and growth mechanism of α-Al"2O"3 whiskers
    Amsterdam : Elsevier
    Journal of Crystal Growth 61 (1983), S. 75-79 
    Details
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-0248(83)90281-6
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  • 5
    Electronic Resource
    Electronic Resource
    Diffusivity, respiratory rate and tidal volume influence inert gas expirograms
    Amsterdam : Elsevier
    Respiration Physiology 84 (1991), S. 31-47 
    Details
    ISSN: 0034-5687
    Keywords: Expirogram, alveolar slope ; Gas mixing in lung ; Inert gases, and intrapulmonary gas mixing
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0034-5687(91)90017-D
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  • 6
    Electronic Resource
    Electronic Resource
    SnO"2Si(100) interface
    Amsterdam : Elsevier
    Vacuum 41 (1990), S. 1053-1055 
    Details
    ISSN: 0042-207X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0042-207X(90)93859-H
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  • 7
    Electronic Resource
    Electronic Resource
    Orthogonal and Nonorthogonal Multiresolution Analysis, Scale Discrete and Exact Fully Discrete Wavelet Transform on the Sphere (1998)
    Springer
    Constructive approximation 14 (1998), S. 493-515 
    Details
    ISSN: 1432-0940
    Keywords: Key words. Spherical multiresolution analysis, Scaling function, Scale discrete wavelets, Rational wavelets, Exponential wavelets, Orthogonal (Shannon) wavelets, de La Vallée-Poussin wavelets, Exact fully discrete wavelet transform. AMS Classification. 41A58, 42C15, 44A35, 45E99.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract. Based on a new definition of dilation a scale discrete version of spherical multiresolution is described, starting from a scale discrete wavelet transform on the sphere. Depending on the type of application, different families of wavelets are chosen. In particular, spherical Shannon wavelets are constructed that form an orthogonal multiresolution analysis. Finally fully discrete wavelet approximation is discussed in the case of band-limited wavelets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003659900087
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  • 8
    Electronic Resource
    Electronic Resource
    Spherical panel clustering and its numerical aspects (1998)
    Springer
    Journal of geodesy 72 (1998), S. 586-599 
    Details
    ISSN: 1432-1394
    Keywords: Key words. Panel clustering ; Numerical integration ; Spline and wavelet-based determination of the geoid and the gravitational potential
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract. In modern approximation methods, linear combinations in terms of (space localizing) radial basis functions play an essential role. Areas of application are numerical integration formulae on the unit sphere Ω corresponding to prescribed nodes, spherical spline interpolation and spherical wavelet approximation. The evaluation of such a linear combination is a time-consuming task, since a certain number of summations, multiplications and the calculation of scalar products are required. A generalization of the panel clustering method in a spherical setup is presented. The economy and efficiency of panel clustering are demonstrated for three fields of interest, namely upward continuation of the Earth's gravitational potential, geoid computation by spherical splines and wavelet reconstruction of the gravitational potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001900050197
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  • 9
    Electronic Resource
    Electronic Resource
    Progressive multifokale Leukoenzephalopathie bei Wegener'scher Granulomatose unter Therapie mit Cyclosporin A (1989)
    Springer
    Journal of molecular medicine 67 (1989), S. 260-264 
    Details
    ISSN: 1432-1440
    Keywords: Progressive multifokale Leukoenzephalopathie (PML) ; Wegener'sche Granulomatose ; Cyclosporin A (CyA)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A female patient with Wegener's granulomatosis developed severe bone marrow depression after two years treatment with cyclophosphamide. Corticosteroids alone could not sufficiently suppress disease activity, therefore additive therapy with Cyclosporin A was started. Four weeks later the patient developed a central nervous system disorder with affective disturbances and progressive somnolence. However, inspite of intensive diagnostic procedures, no definite diagnosis could be established. After another two months she died. Post-mortem-examination showed progressive multifocal leukoencephalopathy. An association between immunosuppressive therapy and reactivation of JC-Virus is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01717330
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  • 10
    Electronic Resource
    Electronic Resource
    MRI with Gd-DTPA in tumours of larynx and hypopharynx (1991)
    Springer
    European radiology 1 (1991), S. 58-64 
    Details
    ISSN: 1432-1084
    Keywords: MRI ; Larynx ; Hypopharyngeal tumours ; Contrast media
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Twenty-eight patients with tumours of the larynx, divided into supraglottic, glottic, and subglottic lesions, and of the hypopharynx were examined by different MRI techniques using the paramagnetic contrast medium Gd-DTPA. The results of preoperative MRI were compared with clinical laryngoscopy and the pathological tumour classification. The examinations were carried out using plain T1-wand T2-weighted and Gd-DTPA enhanced T1-weighted sequences. Most studies included three slice orientations for optimal assessment of different tumour locations. The most accurate diagnostic information was given by Gd-DTPA-enhanced sequences. The combination of plain images, contrast-enhanced images and subtraction enabled precise assessment of deep infiltration. T2-weighted and proton density sequences conveyed more information about cartilage invasion and liquid-filled structures, but gave more artefacts than T1-weighted images. Laryngoscopy had advantages in T1-classified tumors, as the extent of the tumor could be seen, and offered histological information via biopsy. Diagnostic findings of MRI correlated in 85.7% with the pathologist's report, and laryngoscopy provided exact classification in only 64.3% of patients. Gd-DTPA-enhanced MRI is an important adjunct to non-contrast MR studies, and forms an ideal diagnostic supplement to laryngoscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540106
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