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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical documentation 11 (1971), S. 106-110 
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    facet.materialart.
    Unknown
    Boston, Mass., etc. : Periodicals Archive Online (PAO)
    The North American Review. 156 (1893:Jan./June) 439 
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 269 (1974), S. 41-46 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The neutron flux distribution on the wall of a toroidal CTR device with strongly elongated cross section is calculated. On the inner and outer cylindrical walls (belt-pinch device) the flux distribution has a plateau region with a half-width equal to about the height of the plasma. The maximum flux is found on the outer cylinder and in the symmetry plane (z 0=0). The neutron flux asymmetry and reductionη of the mean wall loading are determined. For standard data anη of 57% is computed. This is mainly due to the flux profiles on the cylindrical walls and does not depend sensitively on the toroidal curvature. For standard parameters the inner cylinder absorbs 22.6%, the outer cylinder 68.6% and the end plates together 8.8% of the total neutron emission. The corresponding values for a straight device with the same coil and plasma cross section are 44%, 44% and 12%. A reduction of toroidal curvature diminishes flux asymmetry between the inner and outer cylinders. The maximum flux and minimumη-value are obtained at a large torus radius equal to two times the coil width. For small aspect ratios (R t W0.5) the neutron flux through the inner cylinder becomes so small that its interior may be filled with a material other than a blanket material, e.g. with an iron core.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 104 (1973), S. 1138-1138 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 150 (1972), S. 87-93 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Bei der Ermittlung der Bleilässigkeit von Bedarfsgegenständen erfolgt zunächst eine Säurebehandlung des Gegenstandes, dann wird im Säureauszug der Bleigehalt ermittelt. Es werden verschiedene Verfahren der Säurebehandlung aufgeführt, wobei der Kaltextraktion mit 4 % iger Essigsäure über 24 Std der Vorzug gegeben wird. Die Bleibestimmung im essigsauren Auszug wird mit Hilfe der AAS durchgeführt. Das Chromatverfahren nach DIN 51031 wird in einigen Punkten geändert. Nach dem abgewandelten Chromatverfahren werden die gleichen Bleigehalte wie mit Hilfe der AAS erhalten. Sodann wird auf die rechtliche Beurteilung der vom Gebrauchsgegenstand abgegebenen Bleimenge unter Berücksichtigung der internationalen Gesetzgebung hingewiesen. Die Rechtslage in der BRD ist unbefriedigend. Es wird vorgeschlagen, die im Essigauszug enthaltenen Bleimengen auf die den Speisen zugewandte Oberfläche des Gebrauchsgegenstandes zu beziehen und eine Höchstmenge von 2 mg Blei je dm2 Oberfläche zu tolerieren.
    Notes: Summary The determination of lead solubility from ceramics is realized by extraction with acetic acid (4 % w/w in water, 24 hours at room temperature) and by following determination of lead by atomic absorption. The supplementary analysis by iodometric determination as lead chromate (DIN 51031) is varied in some points, so that both ways give the same results. The legal valuation of lead solubility is discussed in an international view.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 69 (1971), S. 246-263 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Avec une machine universelle servant à mesurer la tension, on a examiné les particularités mécaniques de l'aponévrose humaine par rapport à l'âge des malades, à la conservation et au trajet des faisceaux. On a pu en déduire les mesures mécaniques suivantes: l'indice de la tangente, la résistance de la tension, l'allongement dû à la force maximale, la montée de la courbe de relaxation. Avec l'avancemant en âge on pouvait oberver un accroissement de la fixité de l'indice de la tangente. Les prélévement naturels ainsi que les prélévements cialites montraient une tendance à des veleurs plus hautes de résistance et de l'indice de la tangente au contraire des prélévements lyophilisés. Les grandeurs mécaniques de résistance montraient une dépendance nette de l'angle du trajet des faisceaux et de la direction de la tension. On a discuté du rapport des transformations mécaniques constatées suivant l'âge et des examens physico-cliniques et électroniques-microscopiques chez d'autres. On a montré la wécessité de connaître les particularites mécaniques de l'aponéarose pour l'emploi clinique comme greffe homo- et autologue.
    Abstract: Zusammenfassung Mit dem Universalprüfgerät (Modell Instron TT-MC) wurde menschliche Fascie auf ihre alters-, konservierungs- und faserverlaufsbedingten mechanischen Eigenschaften untersucht. Folgende mechanische Kenngrößen wurden bestimmt: Tangentenmodul, Zugfestigkeit, Dehnung bei Höchstkraft, Steigung der Relaxationskurve. — Eine zunehmende Verfestigung konnte mit Zunahme des Lebensalters festgestellt werden. — Eine Tendenz zu höheren Zugfestigkeits-und Tangentenmodulwerten zeigten die nativen sowie cialit-konservierten im Gegensatz zu den lyophilisierten Proben. Die mechanischen Kenngrößen zeigten eine deutliche Abhängigkeit vom Winkel zwischen Faserverlauf und Zugrichtung. Ein Zusammenhang der festgestellten altersabhängigen mechanischen Veränderungen mit physiko-chemischen und elektronenmikroskopischen Untersuchungen anderer Autoren wird diskutiert. Auf die Notwendigkeit der Kenntnis der mechanischen Eigenschaften der Fascie bei ihrer klinischen Verwendung als homo- und autologes Transplantat wird hingewiesen.
    Notes: Summary Human fascia has been examined with the aid of a universal test equipment as to its mechanical properties in relation to age, conservation and texture. The following mechanical characteristics have been determined: Tangent module, firmness, extension under appliance of maximal force and increase of the relaxation curve. An increasing hardening could be stated with advancing age. A tendency towards higher values of firmness and tangent modules became evident with native and cialit conserved samples in contrast to such treated by means of lyophilization. The mechanical characteristics revealed a definite dependence from the angle between texture and direction of extension. The correlation of the stated mechanical changes depending on age is discussed together with physico-chemical and electronmicroscopic investigations of other authors. It is pointed to the necessity of knowledge on the mechanical properties of fascia when using it clinically as a homologous or heterologous transplant.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 168 (1971), S. 359-361 
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Isolierte Körperteile vonLineus sanguineus wurden in Seewasser gehalten, das unterschiedliche Konzentrationen (1,9, 0,95 und 0,48 μg/ml) von Actinomycin-D enthielt. Nach 4, 5, 6 und 10 Tagen wurden die Regenerate histologisch und histochemisch (Glykogen, Glucose-6-phosphat-Dehydrogenase und RNS) untersucht. In Abhängigkeit von der Actinomycin-D-Konzentration werden bestimmte Phasen der Regeneration gehemmt; dabei sind Proliferationsprozesse weniger empfindlich als Differenzierungsprozesse. Histochemisch werden bei Hemmung der wachstumsaktiven Areale die im Normalfall zu beobachtenden stofflichen Merkmale: Glykogeneinlagerung und nachfolgender Anstieg der G-6-P-DH-Aktivität und der RNS-Konzentration vermißt.
    Notes: Summary Fragments ofLineus sanguineus were incubated in seawater, which contained different concentrations of actinomycin-D (1.9 μg/ml, 0.95 μg/ml and 0.48 μg/ml). After 4, 5, 6 and 10 days the regenerates were studied by histological and histochemical methods (glycogen, glucose-6-phosphate-dehydrogenase and RNA). Corresponding to actinomycin-D concentration certain phases of regeneration are inhibited. The phases of proliferation are less sensitive to actinomycin-D than the phases of differentiation. If morphogenetic areas are inhibited, the normally demonstrable histochemical characteristics: accumulation of glycogen and later, the increase of G-6-P-DH activity and RNA concentration do not appear.
    Type of Medium: Electronic Resource
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  • 8
    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
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  • 9
    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
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  • 10
    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
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