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  • 2000-2004  (2)
  • 1990-1994  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Calibration method for the quantitative analysis of gas mixtures by means of multiphoton ionization mass spectrometry (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 3482-3486 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A technique for quantitative analysis of gas mixtures in a laser mass spectrometer is presented. It is based on the addition of two calibration gases with different orders of multiphoton ionization process to the sample gas. The ratio of the signals of these two internal standards serves as a sensor for the laser intensity within the ionization volume. Thus strongly fluctuating signals due to higher-order multiphoton ionization can be normalized for every single laser shot. In addition, for such a relative measurement, effects of long-term drifts of the apparatus are eliminated. Concentrations varying from a few ppm to several percent could be determined with an accuracy better than 10% at every single laser shot. Therefore this technique allows high time resolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144272
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Expression of matrix metalloproteinases MMP-2, MMP-9 and their tissue inhibitors TIMP-1, -2, and -3 in benign and malignant tumours of the salivary gland (2004)
    Oxford, UK : Blackwell Science Ltd
    Histopathology 44 (2004), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims:  The balance between matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) is involved in the morphogenesis of the normal salivary gland as well as in mechanisms of tumour invasion and metastasis. Our aim was to analyse protein and mRNA expression of MMPs and TIMPs in normal salivary gland tissue and in various salivary gland neoplasms.Methods and results:  Immunohistochemistry for MMP-2, MMP-9, TIMP-1, -2 and -3 was performed in 20 malignant and six benign salivary gland tumours. The immunoscores of MMP-2 were significantly higher in carcinomas compared with adenomas (P = 0.0028). The MMP/TIMP ratio was significantly higher in carcinomas than in adenomas (P = 0.0097). In mucoepidermoid carcinomas MMP-2 expression was preferentially observed in the intermediate cell type. Neoplastic acinar cells of acinic cell carcinoma demonstrated de novo expression of MMP-2, MMP-9, TIMP-1, and TIMP-2. Immunoscores of TIMP-3 were not decreased in malignant tumours compared with adenomas. In accordance with the immunostaining of MMP-2 and -9, gelatinolytic activity could be demonstrated by in-situ zymography. The mRNA expression of MMPs and TIMPs analysed by real-time reverse transcriptase-polymerase chain reaction in three malignant and two benign tumours and their corresponding normal tissue did not generally correlate with their protein expression.Conclusions:  Our findings suggest a disturbed balance between MMP and TIMP in malignant salivary gland tumours. MMP-2 expression in particular seems to be related to the invasive properties and the malignant potential of these tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0309-0167.2004.01814.x
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    Paper (German National Licenses)
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  • 3
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    Preferences for a verb's complements and their use in sentence processing (1993)
    New York : Periodicals Archive Online (PAO)
    Journal of Memory and Language. 32:1 (1993:Feb.) 96 
    Details
    ISSN: 0749-596X
    Topics: Psychology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:b180-1993-032-01-000006
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Hämolytische Krise bei einem 34-jährigen Westafrikaner (2000)
    Springer
    Der Internist 41 (2000), S. 762-764 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Malaria ; hämolytische Krise ; HbC-Erkrankung ; Glucose-6-Phosphat-Dehydrogenase-Mangel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Bei Patienten aus afrikanischen, asiatischen oder mediterranen Ländern, die mit Fieber, Ikterus, abdominalen Beschwerden, Splenomegalie und Hämolyse erkranken, ist neben dem Vorliegen einer Plasmodieninfektion (Malaria) immer auch an eine hämolytische Krise im Rahmen einer Hämoglobino- oder Enzymopathie der Erythrozyten zu denken. Beschrieben wird das Krankheitsbild eines 34-jährigen Afrikaners aus Burkina Faso, der unter Malariaverdacht stationär aufgenommen wurde. Die klinische Symptomatik war vergleichbar, eine sorgfältige Inspektion des Blutbildes ergab jedoch durch den Nachweis von Target-Zellen den Hinweis auf eine Hämoglobinopathie, die sich dann als HbC-Anlage mit zusätzlich vorliegendem Glucose-6-Phosphat-Dehydrognase-Mangel erwies. Angeborene korpuskuläre hämolytische Anämien (Membranproteindefekte, Stoffwechseldefekte, Globulinsynthesedefekte) sind im mitteleuropäischen Raum eher seltene Ursachen hämolytischer Krisen. Weltweit sind jedoch weit über 400 Mio. Menschen betroffen [9], überwiegend in afrikanischen und asiatischen Ländern. Die Prävalenz der einzelnen Defekte kann regional bis zu 14% betragen [2].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050614
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Model-based object tracking in monocular image sequences of road traffic scenes (1993)
    Springer
    International journal of computer vision 10 (1993), S. 257-281 
    Details
    ISSN: 1573-1405
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Moving vehicles are detected and tracked automatically in monocular image sequences from road traffic scenes recorded by a stationary camera. In order to exploit the a priori knowledge about shape and motion of vehicles in traffic scenes, a parameterized vehicle model is used for an intraframe matching process and a recursive estimator based on a motion model is used for motion estimation. An interpretation cycle supports the intraframe matching process with a state MAP-update step. Initial model hypotheses are generated using an image segmentation component which clusters coherently moving image features into candidate representations of images of a moving vehicle. The inclusion of an illumination model allows taking shadow edges of the vehicle into account during the matching process. Only such an elaborate combination of various techniques has enabled us to track vehicles under complex illumination conditions and over long (over 400 frames) monocular image sequences. Results on various real-world road traffic scenes are presented and open problems as well as future work are outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539538
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Prosody and the processing of filler-gap sentences (1994)
    Springer
    Journal of psycholinguistic research 23 (1994), S. 473-485 
    Details
    ISSN: 1573-6555
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Abstract This study was designed to explore the effects of linguistic prosody on the processing of “filler-gap” sentences. We designed two experiments to determine first whether the sentence processor uses information contained in the prosodic contour of an utterance during on-line processing, and second the form that information may take. In Experiment 1, we found that prosody apparently influences when listeners posit gaps on-line. In Experiment 2, we obtained acoustic evidence that gaps are represented in the prosodic contour of an utterance. The results of this study support a view in which prosody contributes very early to on-line structure building mechanisms during sentence processing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02146686
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and examination of chiral liquid crystalline side chain polymers (1994)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 45 (1994), S. 21-25 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Substituted poly(methylsiloxane)s connected by a spacer with a biphenyl system that is esterificated with a chiral α-chlorocarboxylic acid have been synthesized and characterized. Their liquid crystalline properties have been studied by differential scanning calorimetry (DSC), polarization microscopy, electro-optical methods and X-ray diffraction. Most of the synthesized compounds and polymers have liquid crystalline phases, mainly smectic phases.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1994.010450105
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