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  • 1
    Electronic Resource
    Electronic Resource
    The Purkinje fiber-myocardial cell region in the goat heart as studied by combined scanning electron microscopy and chemical digestion (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 849-850 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The 3-dimensional architecture of the junctional region between Purkinje fibers and ordinary myocardial cells has been closely studied by combined scanning electron microscopy and chemical digestion in the goat heart. It was revealed that the Purkinje fibers forming the terminal arborization of the atrioventricular bundle are followed by transitional cells which are in contact with ordinary myocardial cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951989
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of amino acids on cat red nucleus neurons in vitro (1984)
    Springer
    Experimental brain research 54 (1984), S. 150-156 
    Details
    ISSN: 1432-1106
    Keywords: EPSP ; IPSP ; Amino acids ; Red nucleus ; Brain slice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intracellular records were obtained from neurons in the region of the red nucleus (RN) of cat brain slices. Both EPSPs and IPSPs were recorded in response to local electrical stimulation and these resembled similar electrophysiological responses observed in experiments conducted in vivo. Monosynaptic and polysynaptic IPSPs were observed, suggesting the existence of inhibitory interneurons near or within the RN region. When added to the bathing solution, L-glutamate and L-aspartate depolarized RN neurons with a decrease in input resistance. γ-Aminobutyric acid (GABA) and glycine hyperpolarized the cells with a decrease in input resistance. GABA also elicited a depolarizing response. These amino acid actions had direct postsynaptic effects, since the experiments were conducted in a low Ca2+/high Mg2+ medium which blocked synaptic transmission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00235826
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  • 3
    Electronic Resource
    Electronic Resource
    Clinical pathology of malignant meningiomas (1984)
    Springer
    Acta neurochirurgica 73 (1984), S. 179-191 
    Details
    ISSN: 0942-0940
    Keywords: Meningioma ; malignant tumour ; papillary meningioma ; anaplastic meningioma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Nineteen cases of malignant meningiomas-seven haemangiopericytic, two papillary and ten of the anaplastic type-were examined clinicopathologically. These were ten male and nine female patients and eleven of these received reoperation for recurrence. Tumours of the hemangiopericytic type had similar angiographic and macrooscopic features and malignant characteristics were found microscopically in some tumours. There were intratumoral cysts in both cases of the papillary type and these tumours had a high cellularity, an increased number of mitosis, haemorrhage and partially haemangiopericytic patterns. Six cases of the anaplastic type had changed from a benign type at recurrence and those tumours had variable features radiographically and macroscopically. Lack of typical arrangement, a large number of mitoses, increased cellularity, focal necrosis, brain infiltration, pleomorphism and anaplasia were found histologically. Four cases of the anaplastic type were diagnosed at the first operation and these tumours had apparently similar angiographic and macroscopic features, but with variable organoid structures and malignant forms, microscopically. Electron microscopic features are also described. In malignant meningiomas, the recurrence rate was high even in cases of total removal. The outcome for these patients was good in the papillary type, relatively good in the haemangiopericytic type and poor in the anaplastic type. From these results therapeutic indications are also suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01400851
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  • 4
    Electronic Resource
    Electronic Resource
    Matrix isolation spectroscopy by A. J. Barnes, W. J. Orville-Thomas, A. Müller and R. Gaufrés (1982)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 751-751 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739482001545
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  • 5
    Electronic Resource
    Electronic Resource
    Structure of funicin, antimicrobial substance from Aspergillus funiculosus, C17H18O5 (1983)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 268-270 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270183004357
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  • 6
    Electronic Resource
    Electronic Resource
    Experimental studies on band saw blade vibration (1981)
    Springer
    Wood science and technology 15 (1981), S. 145-159 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The band saw blade vibration under non-moving and moving conditions has been experimentally studied for band saw blades unfitted with saw tension and back crown, fitted only with saw tension, and only with back crown. The lateral natural frequency of a band saw blade was found to decrease by fitting saw tension in a saw blade, but there was little or no effect for blades having only back crown. The torsional natural frequency of a band saw blade increased by fitting saw tension in a saw blade, but again there was little or no effect of fitting back crown in a blade. The lateral natural frequency decreased by tilting the upper wheel for the band saw blades investigated. On the contrary, when the upper wheel was tilted the torsional natural frequency increased for an untensioned blade with no back crown, and blades fitted only with back crown, however, there was little or no effect for a band saw blade fitted only with tension. The lateral and torsional natural frequencies significantly affected the over all self-excited displacement vibration of band saw blades. However, the displacement vibration due to the frequency of the number of wheel rotation affected significantly the over all self-excited displacement vibration of a band saw blade fitted with excessive back crown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00367860
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  • 7
    Electronic Resource
    Electronic Resource
    Die monomolekularen Filme von n-Palmitoyl-Lprolin-Oligomeren (1980)
    Springer
    Colloid & polymer science 258 (1980), S. 990-990 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584941
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  • 8
    Electronic Resource
    Electronic Resource
    Fluorometric determination of tin(IV) with 3-hydroxychromone (1980)
    Springer
    Microchimica acta 73 (1980), S. 301-306 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung 3-Hydroxychromon reagiert mit Zinn(IV) in schwach saurem bis neutralem Medium unter Bildung eines 1∶1-Komplexes. Dieser fluoresziert intensiv. Ein empfindliches Verfahren zur Bestimmung von Sn(IV) auf dieser Grundlage wurde ausgearbeitet. Die Eichkurve verläuft in dem Gebiet zwischen 0,4 und 8,0μg Sn/25 ml bei pH 4,5, einer Wellenlänge von 365 nm und bei Messung der Gesamtfluoreszenz geradlinig. Chloride, die die Fluoreszenzintensität bei Zinnbestimmungen im allgemeinen herabsetzen, können bis zu 300 mg toleriert werden.
    Notes: Summary 3-Hydroxychromone reacts with tin(IV) to produce 1∶1 complex in a weakly acidic-neutral medium. The complex exhibits intense fluorescence. A sensitive method is described for the fluorometric determination of tin(IV) with 3-hydroxychromone. The calibration graph is linear in the range of 0.4–8.0μg/25 ml of tin(IV) (pH 4.5–5.0, Excitation wavelength: 365 nm, Measured total fluorescence). Chloride which generally decreases the fluorescence intensity in the fluorometric determination of tin can be tolerated at 300-mg level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196152
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  • 9
    Electronic Resource
    Electronic Resource
    Tissue edema and loss of tracer microspheres in infarcted myocardium (1983)
    Springer
    Basic research in cardiology 78 (1983), S. 124-130 
    Details
    ISSN: 1435-1803
    Keywords: myocardial infarction ; tissue edema ; tracer microspheres ; microsphere loss ; regional myocardial blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Microsphere loss from the ischemic myocardium was studied in a canine model after 2 and 7 days coronary occlusion. 10 million tracer microspheres (TM) of 7–10 μm diameter were injected into the left atrium before and 15 minutes after left anterior descending coronary artery (LAD) occlusion. To determine the tissue water content, dried tissue weight was measured after desiccation. TM content in the nonoccluded left circumflex coronary artery (LCX) area was unchanged before and after coronary occlusion. In the infarcted area, microsphere loss was maximum at the low flow endocardial region averaging 27% and 42% in 2 and 7 days occlusion, respectively. An inverse linear correlation between TM loss and regional blood flow in 2 (r=−0.82, p〈0.05) and 7 (r=−0.96, p〈0.01) days coronary occlusion was noted. Water content was increased in the ischemic endocardium by 4.1 and 5.7% in 2 and 7 days occlusion, thus approximately 17% of TM loss was attributed to tissue edema. These results suggest that there is an ischemia-dependent reduction of TM in the ischemic myocardium and that microsphere migration participates in the major part of TM loss. Thus flow measurements by TM may be invalid when this compound is injected during the active phase of microsphere migration or during water content alterations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01906666
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  • 10
    Electronic Resource
    Electronic Resource
    A newly developed X-ray transparent ameroid constrictor for study on progression of gradual coronary stenosis (1980)
    Springer
    Basic research in cardiology 75 (1980), S. 537-543 
    Details
    ISSN: 1435-1803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Für das experimentelle Studium chronischer Koronarstenosen wurde ein Ameroid-Konstriktor modifiziert, um die Beurteilung des Einengungsgrades aufgrund cineangiographischer Serienuntersuchungen zu erleichtern. Um eine Schwellung des Ameroid-Materials nach außen zu verhindern, wurde — anstelle eines Metallrahmens — ein strahlendruchlässiger Plastikring benutzt. 10, 20 und 30 Tage nach der Implantation des Ameroid-Konstriktors am R. circumflexus der linken Koronararterie wurde eine Koronarangiographie vorgenommen, wobei an den betreffenden Tagen eine fortschreitente Koronareinengung von 57, 78 bzw. 88% nachgewiesen wurde. Bei 5 von 6 Hunden ließen sich am 30. Tag Kollateral-Gefäße vom R. interventr. ant. zum R. circumflexus der linken Koronararterie demonstrieren.
    Notes: Summary For the experimental studies on chronic coronary stenosis, an ameroid constrictor was modified to facilitate serial cineangiographic evaluation of the degree of arterial narrowing. A radiolucent plastic ring instead of a stainless frame was used to prevent outward swelling of the ameroid material. Coronary cineangiography was performed 10, 20 and 30 days after the implantation of the modified ameroid constrictor on the left circumflex coronary artery (LCX), which could prove the progressive coronary stenosis of 57, 78 and 88% on the respective days. Collateral channels from the anterior descending branch of the left coronary artery to the LCX were demonstrated angiographically in 5 out of the 6 dogs on the 30th day.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01907835
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