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  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 20 (1941), S. 867-868 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Die Nachteile der bisher angegebenen Methoden zur Herstellung der Ausgleichslösung bei der Vitamin B1-Bestimmung mittels Thiochrom werden aufgezeigt. Es wird eine neue Methode zur Herstellung einer Ausgleichslösung beschrieben, die darin besteht, daß die Untersuchungslösung mit Natronlauge versetzt wird. Zur Vermeidung der Bildung blaufluorescierender Substanzen aus Aneurin wird dieser Ausgleichslösung vor dem Natronlaugezusatz Natriumhydrosulfit zugefügt. Zur Berechnung des mittleren Fehlers des Mittelwertes und der Einzelmessung wird eine Beleganalyse vorgelegt.
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Kollagenose ; Lupus erythematodes profundus ; Periorbitales Ödem ; Key words Collagenosis ; Lupus panniculitis ; Periorbital edema
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Periorbital edema may occur initially or in the course of a wide variety of diseases. One of these diseases is lupus panniculitis, a variant of lupus erythematosus, characterized by firm subcutaneous nodules that may ulcerate with subsequent scar formation. We present a case of lupus panniculitis in which the periorbital edema was the initial manifestation. Knowledge about the differential diagnostic possibilities of periorbital edema as well as the different variants of cutaneous lupus erythematosus is important to reach the correct diagnosis.
    Notes: Zusammenfassung Das periorbitale Ödem ist ein Symptom, das initial oder im Verlauf von Erkrankungen verschiedenster Genese auftreten kann. Eine mögliche Assoziation stellt der Lupus erythematodes profundus dar. Diese Krankheit ist durch subkutane knotige und plattenartige Infiltrate gekennzeichnet, welche zu Ulzerationen und narbigen Einziehungen führen können. Anhand eines Fallberichts wird aufgezeigt, daß ein periorbitales Ödem als Initialsymptom den typischen Hautveränderungen eines Lupus erythematodes profundus vorausgehen kann. Die Kenntnis der möglichen Differentialdiagnosen bei periorbitalem Ödem sowie der unterschiedlichen Varianten eines Lupus erythematodes ist für die Diagnosestellung von entscheidender Bedeutung.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    International archives of occupational and environmental health 10 (1940), S. 133-150 
    ISSN: 1432-1246
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 100 (1942), S. 126-135 
    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
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 103 (1943), S. 130-135 
    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 1. Unbehandelte Kohle adsorbiert Askorbinsäure unter gleichzeitiger Oxydation. Die Adsorption folgt nicht der Boedeckerschen Adsorptionsformel. 2. Durch Vorbehandlung mit Reduktionsmitteln läßt sich die Oxydation stark vermindern. Besonders geeignet sind Na-hydrosulfit (Na2S2O4) und Na-sulfid. 3. Der Einfluß des Eisens der Kohle auf die Oxydation ist weniger bedeutend, vielmehr überträgt die Kohle direkt Sauerstoff auf die Askorbinsäure. 4. An mit Na-hydrosulfit vorbehandelter Kohle wurde die Adsorption von Askorbinsäure und Dehydroaskorbinsäure entsprechend der Boedeckerschen Formelx=K·(c−x) n gefunden (Fig. 1). Für Askorbinsäure + Dehydroaskorbinsäure:K = 1,55 undn = 1,28 (Kurve 1) für Dehydroaskorbinsäure:,K = 2,05 undn = 0,798 (Kurve 3) daraus für Askorbinsäure berechnetK ∼ 2,3 undn ∼ 0,8 (Kurve 4). Infolge der geringen Adsorption der Dehydroaskorbinsäure findet sich diese im Filtrat neben der Askorbinsäure. 5. Floridin, Bentonit und Frankonit adsorbieren die Askorbinsäure in metaphosphorsaurer Lösung praktisch in den verwendeten Mengen nicht, oxydieren diese aber etwas. Fullererde adsorbiert etwas, ohne dabei zu oxydieren.
    Type of Medium: Electronic Resource
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  • 17
    ISSN: 1435-1285
    Keywords: Key words Palmaz-Schatz-Stent – AVE-Micro-Stent – restenosis-rate – high pressure implantation – morphology of stenosis ; Schlüsselwörter Palmaz-Schatz-Stent – AVE-Micro-Stent – Restenoserate – Hochdruckimplantation – Stenosemorphologie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Late results of interventional procedures utilizing coronary stents are largely determined by the rate of restenosis. So far few data are available addressing the effect of stent design, implantation pressure and morphologic factors on this crucial variable. Therefore we analyzed the coronary angiogramms obtained in 259 patients before, immediately after and at 3 to 6 months following stent implantation for obstructive coronary disease. A total of 196 AVE-Micro-Stents and 142 Palmaz-Schatz-Stents were implanted into 307 stenoses. In 126 stenoses there were implanted only Palmaz-Schatz-Stents, in 170 only AVE-Micro-Stents and in 11 Stenoses there were implanted Palmaz-Schatz- as well as Micro-Stents. Restenosis was defined as an over 50% stenosis at follow up. No significant difference was detected with regard to global restenosis rate at an average of 4 months following implantation (Palmaz-Schatz 33%, Micro-Stent 27%). If results were analzyed according to implantation pressure however, there was a significantly lower restenosis rate for AVE Micro-Stens implanted with 〉 10 atm (17%) as compared to ≤ 10 atm (35%, p 〈 0.02) and as compared to Palmaz-Schatz-Stents (34%, p 〈 0.02), which were also implanted with high pressure over 10 atm. In addition to implantation pressure, vessel segment and morphology of stenosis proved to be important determinants of late results. In this series of patients the AVE-Micro-Stent compared favourably to the Palmaz-Schatz-Stent not only with respect to a significantly lower restenosis rate, when implanted with pressures 〉 10 atm, but also with regard to its superior flexibility and handling characteristics.
    Notes: Zusammenfassung Der Langzeiterfolg einer Stent-Implantation wird im wesentlichen durch die Restenoserate bestimmt. Bisher sind noch nicht alle Faktoren geklärt, welche die Restenoserate beeinflussen. Daher wurde in der vorliegenden Studie der Einfluß zweier unterschiedlicher Stentdesigns, der Implantationsart (Hochdruckimplantation 〉 10 atm, Niederdruckimplantation ≥ 10 atm), der Lokalisation der Stenose sowie der Stenose-Morphologie untersucht. Hierzu wurden die koronarangiographischen Untersuchungen von 259 Patienten, bei denen in 307 Stenosen insgesamt 196 Micro- und 142 Palmaz-Schatz-Stents implantiert worden waren, quantitativ vor, direkt nach und 3-6 Monate nach Stent-Implantation retrospektiv ausgewertet. Es fand sich zwischen den beiden Stent-Typen kein signifikanter Unterschied in der Restenoserate (Palmaz-Schatz 33%, Micro 27%). Bei Hochdruckimplantation des Micro-Stents mit Drucken von 〉 10 atm zeigte sich jedoch eine signifikant niedrigere Restenoserate sowohl im Vergleich zu den mit niedrigen Drucken implantierten Micro-Stents (17% versus 35%, p 〈 0,02) als auch im Vergleich zu den nahezu ausnahmslos mit Hochdruck implantierten Palmaz-Schatz-Stents (17% versus 34%, p 〈 0,02). Lediglich 11 Palmaz-Schatz-Stents wurden mit einem Druck von ≥ 10 atm implantiert. Ein Grund hierfür war aus den Untersuchungsprotokollen retrospektiv nicht zu entnehmen. In der LAD lag die Restenoserate mit 39% signifikant höher als in der RCX (21%) und RCA (22%, p 〈 0,02). Bei komplexen Typ-C-Stenosen zeigt sich eine höhere Restenoserate (39%) als bei Typ-A- (17%) und Typ-B-Stenosen (26%, p 〈 0,05). Insgesamt zeigt diese Studie Vorteile für den mit Hochdruck implantierten AVE-Micro-Stent aufgrund seiner geringeren Restenoserate im Vergleich zum Palmaz-Schatz-Stent.
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1573-5036
    Keywords: Al effect ; microprobe analysis ; nutrient uptake ; pH effect ; Picea abies ; stable isotope labelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In a model system using intact spruce trees (Picea abies [L.] Karst.) we followed the path of magnesium, calcium and potassium during uptake into the root and during long-range transport into the shoot, by multiple stable isotope labelling. The roots of two- and three-year-old spruce trees originating from soil culture were removed from the soil and, in part or in toto, exposed to labelling solutions containing the stable isotopes 25Mg or 26Mg, 41K and 42Ca or 44Ca. Optical-emission-spectroscopy (ICP-OES) of plant fractions and labelling solutions was combined with the quantitative analysis of stable isotope ratios in sections of shock frozen, cryosubstituted material using the laser-microprobe-mass-analyser (LAMMA). This combination allowed us to distinguish, both in bulk samples and on the cellular level between (i) the fraction of elements originally present in the plant before the start of the labelling, (ii) the material taken up from the labelling solution into the plant and (iii) any material released by the plant into the labelling solution. In single-root labelling experiments, roots of three-year-old spruce trees, grown in nursery soil, were exposed to various pH conditions. The exchange of Mg and Ca with the labelling solution was nearly 100% in the cell walls of the mycorrhized finest roots. This exchange was only slightly affected by a step down to pH 3.5. The absolute Mg and Ca content in the cell walls was moderately reduced by incubation at pH 3.5 and strongly reduced in the presence of Al at this pH. After a pH 3.5 and 2 mM Al treatment we found Al in the xylem cell walls and the cortex cell lumina at elevated concentrations. To analyse the combined effect of high Al and high proton concentrations on the long-range transport, we used a “split-root system”. The root mass of an intact two-year-old spruce tree, grown in mineral soil, was divided into even parts and both halves incubated in solutions with two sets of different stable isotopes of Mg and Ca (side A: no Al, 25Mg and 42Ca; side B: +Al, 26Mg and 44Ca) and 41K on both sides. We observed a large uptake of Mg, Ca and K into the plant and a pronounced release. The net uptake of all three elements was lower from the Al-doted solution. In cross-sections of the apical shoot we found after seven-day labelling period about 60–70% of the Mg and Ca and 30% of the K content in the xylem cell walls originating from both labelling solutions. The clear majority of the Mg and Ca label originated from the Al-doted side.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 18 (1996), S. 1413-1418 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The relationship between solventogenesis, heat shock, and DNA topology in Clostridium acetobutylicum was investigated by inhibiting DNA gyrase in vivo by high concentrations of novobiocin. Primer extension and Northern blot analyses revealed that expression of genes required for solventogenesis and heat shock response was induced in the presence of this drug, whereas the transcription rate of acidogenic genes decreased, suggesting a role for DNA supercoiling as a signal for onset of solventogenesis.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 6 (1971), S. 305-308 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Dislocation etching of GaSe single crystals was investigated by using a dilute chromic-sulphuric acid mixture, when conical etch pits were revealed on the (0001) surfaces. At the apices of spiral growth hills, bunches of spiral dislocations were revealed, proving that it is not a single screw dislocation of large Burgers vector, but a bunch of co-operating screw dislocations that were responsible for the spiral growth formations of large step-height. In the case of GaSe crystals, grown by vapour transport methods, dislocation densities of 102 to 106 cm−2 were found. The Bridgman crystals investigated were completely free from non-basal dislocations.
    Type of Medium: Electronic Resource
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