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  • Articles  (47)
  • Springer  (41)
  • Springer Nature  (6)
  • American Meteorological Society (AMS)
  • Berlin: Deutsches Institut für Wirtschaftsforschung (DIW)
  • 1995-1999  (44)
  • 1940-1944  (1)
  • 1925-1929  (2)
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  • Articles  (47)
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Year
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  • 11
    Electronic Resource
    Electronic Resource
    Expression of vascular endothelial growth factor during the development of cardiac hypertrophy in spontaneously hypertensive rats (1998)
    Springer
    Molecular and cellular biochemistry 187 (1998), S. 141-146 
    Details
    ISSN: 1573-4919
    Keywords: VEGF ; hypertrophy ; spontaneously hypertensive rat ; coronary flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Left ventricular hypertrophy (LVH) is often associated with an impaired maximal coronary blood flow and increases the vulnerability of the heart tissue to ischaemia. In this study, the correlation between coronary blood flow and expression of the vascular endothelial growth factor (VEGF) mRNA was investigated. Using both haemodynamic measurements and analysis of mRNA, we have demonstrated that during development of LVH, in spontaneously hypertensive rats (SHR), an impaired maximal coronary flow at 12 weeks of age is associated with low levels of VEGF mRNA. However, in older SHR (32 weeks) with stabilised hypertrophy and a normal maximal coronary flow response, VEGF mRNA levels are increased three-fold. These results suggest that the mechanism for the impaired flow, observed in some types of cardiac hypertrophy, might involve an inadequate growth of the coronary vessels due to insufficient activation of the VEGF gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006887510678
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  • 12
    Electronic Resource
    Electronic Resource
    A novel quadruple beam imaging polarimeter and its application to Comet Tanaka-Machholz 1992 X (1996)
    Springer
    Astrophysics and space science 239 (1996), S. 259-274 
    Details
    ISSN: 1572-946X
    Keywords: Polarimeters ; Comet Tanaka-Machholz 1992 X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For observations of solar system objects an imaging polarimeter has been constructed as an auxiliary instrument for a f/15 focal reducer. With this instrument simultaneous measurement of theQ andU Stokes parameters is possible. It contains no moving parts such as a moving λ/2 retarder. The polarizer consists of two Wollaston prisms which are combined to form a single optical element. Their polarization angles differ by 45°. This compound polarizer is placed in the exit pupil of the afocal telescope-collimator system of the focal reducer and splits the exit pupil into halves. In this way four polarized beams with E-vector orientations 0°, 90°, 45°, and 135° emerge from the exit pupil. These are intercepted by the camera lens of the focal reducer system and imaged simultaneously on the CCD detector. With a properly designed field mask at the Cassegrain focus, the four beams are imaged without overlap. As a demonstration of the capabilities of this quadruple-beam Wollaston-prism polarimeter, we present observations of comet Tanaka-Machholz 1992 X in May 1992. The advantages, shortcomings, and possible improvements of the instrument are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645780
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  • 13
    Electronic Resource
    Electronic Resource
    AURELIA, a program for computer-aided analysis of multidimensional NMR spectra (1995)
    Springer
    Journal of biomolecular NMR 6 (1995), S. 255-270 
    Details
    ISSN: 1573-5001
    Keywords: Multidimensional NMR ; Pattern recognition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary AURELIA is an advanced program for the computer-aided evaluation of two-, three- and four-dimensional NMR spectra of any type of molecule. It can be used for the analysis of spectra of small molecules as well as for evaluation of complicated spectra of biological macromolecules such as proteins. AURELIA is highly interactive and offers a large number of tools, such as artefact reduction, cluster and multiplet analysis, spin system searches, resonance assignments, automated calculation of volumes in multidimensional spectra, calculation of distances with different approaches, including the full relaxation matrix approach, Bayesian analysis of peak features, correlation of molecular structures with NMR data, comparison of spectra via spectral algebra and pattern match techniques, automated sequential assignments on the basis of triple resonance spectra, and automatic strip calculation. In contrast to most other programs, many tasks are performed automatically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00197807
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  • 14
    Electronic Resource
    Electronic Resource
    Besprechungen (1929)
    Springer
    Naturwissenschaften 17 (1929), S. 52-56 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01506324
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  • 15
    Electronic Resource
    Electronic Resource
    Synchronized delivery and playout of distributed stored multimedia streams (1999)
    Springer
    Multimedia systems 7 (1999), S. 70-90 
    Details
    ISSN: 1432-1882
    Keywords: Key words:Sychronization – Multimedia streams – Video server
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract. Multimedia streams such as audio and video impose tight temporal constraints for their presentation. Often, related multimedia streams, such as audio and video, must be presented in a synchronized way. We introduce a novel scheme to ensure the continuous and synchronous delivery of distributed stored multimedia streams across a communications network. We propose a new protocol for synchronized playback and compute the buffer required to achieve both, the continuity within a single substream and the synchronization between related substreams. The scheme is very general and does not require synchronized clocks. Using a resynchronization protocol based on buffer level control, the scheme is able to cope with server drop-outs and clock drift. The synchronization scheme has been implemented and the paper concludes with our experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005300050112
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  • 16
    Electronic Resource
    Electronic Resource
    Der ungarische hundsfisch (Umbra lacustris grossinder) (1940)
    Springer
    Zoomorphology 36 (1940), S. 745-811 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403144
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  • 17
    Electronic Resource
    Electronic Resource
    Structural analysis of neutral glycosphingolipids from Ascaris suum adults (Nematoda: Ascaridida) (1997)
    Springer
    Glycoconjugate journal 14 (1997), S. 389-399 
    Details
    ISSN: 1573-4986
    Keywords: arthro-series glycosphingolipids ; Ascaris suum ; (iso-branched) C17 sphingoid-bases ; neutral glycosphingolipids ; parasitic nematodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The neutral glycosphingolipid fraction from adults of the pig parasitic nematode, Ascaris suum, was resolved into four components on thin-layer chromatography. The high-performance liquid chromatography-isolated components were structurally analysed by: methylation analysis; exoglycosidase cleavage; gas-liquid chromatography/mass spectrometry; liquid secondary-ion mass spectrometry; and, in particular, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Their chemical structures were determined as: Glc(β1-1)ceramide, Man(β1-4)Glc(β1-1)ceramide, GlcNAc(β1-3)Man(β1-4)Glc(β1-1)ceramide and Gal(α1-3)GalNAc(β1-4)GlcNAc(β1-3)Man(β1-4)Glc(β1-1)ceramide; and were characterized as belonging to the arthro-series of protostomial glycosphingolipids. No glycosphingolipid component corresponding to ceramide tetrasaccharide was detected during these analyses. The ceramide composition of the parent glycosphingolipids was dominated by the 2-(R)-hydroxy C24:0 fatty acid, cerebronic acid, and C17 sphingoid-bases: 15-methylhexadecasphing-4-enine and 15-methylhexadecaphinganine in approximately equal proportions. The component ceramide monohexoside was characterized by an additional 15-methylhexadecaphytosphingosine. Abbreviations: CDH, ceramide dihexoside; Cer, ceramide; CMH, ceramide monohexoside; CPH, ceramide pentahexoside; CTH, ceramide trihexoside; CTetH, ceramide tetrahexoside; Hex, hexose; HexNAc, N-acetylhexosamine; HPTLC, high-performance thin-layer chromatography; LSIMS, liquid secondary-ion mass spectrometry; MALDI-TOF-MS, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry; N-, Nz- and A-glyco(sphingo)lipids, neutral, neutralzwitterionic and acidic glyco(sphingo)lipids, respectively
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018530914067
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  • 18
    Electronic Resource
    Electronic Resource
    A phase II study of thioTEPA in children with recurrent solid tumor malignancies: a Children's Cancer Group study (1995)
    Springer
    Investigational new drugs 13 (1995), S. 337-342 
    Details
    ISSN: 1573-0646
    Keywords: thioTEPA ; alkylating agents ; sarcomas ; chemotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary A Phase II study of thioTEPA was performed by the Children's Cancer Group. ThioTEPA was administered intravenously every three weeks, at a dose of 65 mg/m2. Pediatric patients with recurrent sarcomas were targeted, but patients with other tumor diagnoses were also eligible. Toxicity was primarily hematopoietic, with thrombocytopenia being predominant. ThioTEPA did not demonstrate significant activity in the target tumor groups evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00873141
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  • 19
    Electronic Resource
    Electronic Resource
    Slicing the Oppenheimer-Snyder Collapse: Harmonic versus Maximal Slicing (1997)
    Springer
    General relativity and gravitation 29 (1997), S. 1257-1268 
    Details
    ISSN: 1572-9532
    Keywords: NUMERICAL RELATIVITY
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In continuing our studies of temporal slicings of spacetimes, we consider the collapse from rest of an initially homogeneous dust sphere, known as Oppenheimer-Snyder collapse. It is shown that in the case of harmonic slicing the whole spacetime becomes covered by slices extending to spatial infinity in contrast to maximal slicing. The behavior of the lapse function is discussed, especially for various data on the initial slice, and it is demonstrated that not every choice of the initial lapse leads to meaningful slicings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018811829719
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  • 20
    Electronic Resource
    Electronic Resource
    Observation of antihydrogen production in flight at CERN (1997)
    Springer
    Hyperfine interactions 109 (1997), S. 191-203 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The observation of the production of antihydrogen atoms \overlineH 0\equiv\barpe+, the simplest atomic bound state of antimatter, is presented. A method has been used by the PS210 collaboration at LEAR which assumes that the production of \overlineH0 is predominantly mediated by the e+e--pair creation via the two-photon mechanism in the antiproton--nucleus interaction. Neutral \overlineH0 atoms are indentified by a unique sequence of characteristics. In principle \overlineH0 is well suited for investigations of fundamental CPT violation studies under different forces, however, in our investigations we concentrate on the production of this antimatter object, since so far it had not been observed. The production of eleven antihydrogen atoms is reported including possibly 2± 1 background signals, the observed yield agrees with theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012609601849
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