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  • 1
    Electronic Resource
    Electronic Resource
    Imaging of cerebral arterio-venous malformations by transcranial colour-coded real-time sonography (1990)
    Springer
    Neuroradiology 32 (1990), S. 280-288 
    Details
    ISSN: 1432-1920
    Keywords: Transcranial Doppler sonography ; Duplex scanning ; Arterio-venous malformation ; Real-time sonography ; Transcranial color-coded sonography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Transcranial color-coded real-time sonography (TCCS) is a new diagnostic method allowing the non-invasive imaging of parenchymal and vascular structures of the adult brain through the intact skull. A description of the sonographic findings in two patients presenting with a radiologically ascertained arterio-venous malformation is provided. The AVM's can be depicted in the two-dimensional B-mode image as echodense areas interspersed with zones of lower echodensity. Their extension correlated with corresponding MRI images. The color-coded illustration of intravascular flow phenomena allowed the distinct identification of the major afferent feeding vessels, the venous drainage and of the vascular convolution of both AVM's. Information on hemodynamics, as e.g. the blood supply of the angioma by the contralateral internal carotid artery, are obtained by color-coded identification of intravascular flow direction including analysis of the Doppler frequency spectrrum. All findings obtained by TCCS complied with those established by angiography. We conclude, that TCCS is a suitable method for early diagnosis and long term follow up of cerebral AVM's.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00593046
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  • 2
    Electronic Resource
    Electronic Resource
    Reliability of transcranial colour-coded real-time sonography in assessment of brain tumours: correlation of ultrasound, computed tomography and biopsy findings (1994)
    Springer
    Neuroradiology 36 (1994), S. 585-590 
    Details
    ISSN: 1432-1920
    Keywords: Brain tumours ; Ultrasonography ; Computed tomography ; Stereotactic biopsy ; Transcranial colour-coded real time sonography ; Glloma ; Central nervous system ; Duplex sonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Transcranial colour-coded real-time sonography (TCCS) was carried out in 25 patients with brain tumours to determine whether this noninvasive method provides additional information about the extent of solid tumour, its differentiation from oedema, and its tissue components. All 25 patients had serial computed tomography (CT)-guided stereotactic biopsies. Comparison of ultrasound, CT and histological findings revealed that the vast majority of contrast enhancing areas on CT were hyperechogenic (32/33; 97%) and contained tumour tissue (29/32; 91%). Hyperechogenic areas always represented solid tumour (23/23 patients), even when CT showed low density non-enhancing lesions. In lestons hypoechogenic on TCCS and low density on CT, histology consistently revealed necrotic tumour (7/7). Biopsies obtained from parenchyma with normal echogenicity revealed tumour in only 3 of 16 speciemens. Despite the high specificity of TCCS in the differentiation of tumour components, its sensitivity to tumour was inferior to that of CT (24/25; 96%). TCCS thus allows noninvasive preoperative identification of tumour tissue and its extent setting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600414
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  • 3
    Electronic Resource
    Electronic Resource
    Osteoporoseprävention durch postmenopausale Östrogen-Gestagen-Substitution — Langzeitergebnisse und Compliance (1993)
    Springer
    Archives of gynecology and obstetrics 254 (1993), S. 296-297 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265998
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  • 4
    Electronic Resource
    Electronic Resource
    Wird „Phoenix 3.42“ den Erwartungen gerecht? — Erste Erfahrungen mit einem klinisch-onkologischen Datenverarbeitungsprogramm der neuen Generation (1993)
    Springer
    Archives of gynecology and obstetrics 254 (1993), S. 1145-1146 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02266342
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  • 5
    Electronic Resource
    Electronic Resource
    Omega-oxidized leukotriene B4 detected in the broncho-alveolar lavage fluid of patients with non-cardiogenic pulmonary edema, but not in those with cardiogenic edema (1991)
    Springer
    Intensive care medicine 17 (1991), S. 1-6 
    Details
    ISSN: 1432-1238
    Keywords: Lung edema ; Acute respiratory distress syndrome ; Leukotrienes ; LTB4 ; Omega-oxidation products of LTB4 ; Broncho-alveolar lavage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Leukotriene (LT) generation has been implicated in the pathogenesis of the acure respiratory distress syndrome, ARDS. In the present study, we analysed broncho-alveolar lavage fluids of patients on mechanical ventilation because of ARDS (17 samples taken from 9 patients) or because of cardiogenic edema (8 samples taken from 6 patients) and of healthy volunteers (10 samples from different donors). LTs were separated as methylated and non-methylated compounds using different HPLC procedures, and were identified by chromatographic mobility, on-line UV-spectrum analysis and post HPLC immunoreactivity. In the lavage samples of the healthy volunteers and the patients with cardiogenic edema, no LTs were detected by these technicues (detection limit≃0.1–0.2 ng/ml lavage fluid). By contrast, in 15 out of 17 samples from patients with ARDS LTB4 or its metabolites 20-OH-LTB4 and 20-COOH-LTB4 were detected. The endproduct of omega-oxidation, 20-COOH-LTB4, represented the quantitatively predominant compound, detected in the range of 0.3–2.6ng/ml perfusate. We conclude that the chemotactic agent LTB4 may be involved in the amplification of inflammatory events encountered in ARDS, and that the oxidized metabolites of LTB4 are particularly suitable for monitoring lung leukotriene generation under conditions of neutrophil efflux and oxidative stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01708400
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  • 6
    Electronic Resource
    Electronic Resource
    Problematik der Züchtung auf Eiweißqualität (1963)
    Springer
    Theoretical and applied genetics 33 (1963), S. 313-322 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00709190
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  • 7
    Electronic Resource
    Electronic Resource
    Deformationsabhängigkeit der Spannungsrelaxation von Polyäthylenen verschiedenen Kristallisationsgrades (1961)
    Springer
    Colloid & polymer science 175 (1961), S. 99-110 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Das Spannungsrelaxationsverhalten von vier Polyäthylenen verschiedenen Kristallisationsgrades wurde hei konstanter Temperatur (40,7 °C) in Abhängigkeit von der Deformation gemessen. Es zeigt sich, daß die Kurvenscharen der Spannungσ bis zu Deformationenɛ von 10 ... 20%, bei denen bereits Kaltverstreckung einsetzt, durch eine Beziehung der Form σ(t, ε, c) =Ea (t, c) ·f [ε ·g (c)] wiedergegeben werden können (t: Zeit, c: Kristallisationsgrad); d. h., daß die relative Zeitabhängigkeit der Spannung von der gewählten Deformation in diesem Bereich unabhängig ist. Unter der speziellen Annahme, daß das elastische Stoffverhalten im vorliegenden Meßbereich praktisch ausschließlich durch das der amorphen Phase gegeben ist, wird in Anlehnung an dieMooney- Rivlinsche Theorie für endliche Verformungen die Funktionf=(1−1[1+ɛ·g(c)]2)/2 hergeleitet, mit der das gemessene Deformationsverhalten gut beschrieben werden kann. Die Funktiong(c) und der ElastizitätsmodulE a (t, c) der amorphen Phase lassen sich auf Grund der Buecheschen Modellvorstellung partiell-kristalliner Stoffe mit molekularen Kenngrößen verknüpfen; die so ermittelten Werte der Kristallitabmessungen stimmen befriedigend mit röntgenographischen Meßwerten überein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520665
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  • 8
    Electronic Resource
    Electronic Resource
    Die quantitative Bestimmung der Leberdurchblutung unter Verwendung von kolloidalem radioaktiven Chromphosphat (1961)
    Springer
    Journal of molecular medicine 39 (1961), S. 672-674 
    Details
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Nach Erörterung neuerer Erkenntnisse der Leberphysiologie und Pathophysiologie wurde die Methode der Leberdurchblutungsmessung mit Hilfe von kolloidalem Chromphosphat P32 eingehend besprochen. 20 leber-, herz- und kreislaufgesunde männliche Normalpersonen verschiedenen Alters wurden mit dieser Methode untersucht. Die Eliminationskonstante konnte mit 0,331 ± 0,0130, der Leberblutdurchfluß mit 1729 ± 266,4 ml/min errechnet werden. Vergleich der Ergebnisse mit Angaben aus der Literatur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01477788
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  • 9
    Electronic Resource
    Electronic Resource
    Food preference by five trichopteran scrapers (1994)
    Springer
    Hydrobiologia 273 (1994), S. 171-178 
    Details
    ISSN: 1573-5117
    Keywords: Trichoptera ; scrapers ; selectivity ; food quality ; periphyton ; detritus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Feeding selectivity by five epilithic, case-building trichopteran species from a first-order stream was examined using laboratory experiments. Larvae had the choice of three food types: periphyton and detritus from the stream, and nettle broth as an ‘artificial’ food source. Food type influenced the microdistribution of these species. Larvae were able to distinguish between different food types and showed species-specific responses to the various types of food. Drusus annulatus, Micrasema longulum and Apatania fimbriata favoured periphyton, while Agapetus fuscipes and Silo pallipes showed no preference for periphyton over detritus. Four of the five species examined (Apatania fimbriata was the exception) tended to avoid nettle broth. The complexity of foraging behaviour was illustrated by M. longulum. Given a choice between detritus, periphyton and periphyton with the addition of moss, they clearly preferred the latter food type, scraping mostly on the epiphytic algae. Proportions of a given species selecting periphyton were correlated with percentage areas of algae in the gut contents of that species in the field. D. annulatus, M. longulum and A. fimbriata showed the greatest preference for periphyton, and consumed the highest proportions of algae in the field. A. fuscipes and S. pallipes often selected detritus, and these species had the lowest proportions of algae, and the highest proportions of detritus, in their guts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005640
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  • 10
    Electronic Resource
    Electronic Resource
    Hafnium binding to comparison: comparison between lactoferrin and other transferrins (1993)
    Springer
    Hyperfine interactions 80 (1993), S. 1161-1165 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The TDPAC method was used to study the electric field gradients at the metal sites of human and bovine lactoferrin. Two specific binding configurations were observed. The distribution between these configurations depends on the phosphate content, the pH, and the temperature of the samples. The electric field gradients are compared with the results of previous studies for human and rat serum transferrin, and hen ovotransferrin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567480
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