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  • 1
    Electronic Resource
    Electronic Resource
    Polymerization by phase transfer catalysis (1984)
    Springer
    Polymer bulletin 11 (1984), S. 493-496 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Polyethers from 1,4-bis(chloromethylene)-2,5-dimethoxybenzene and 4,4′-biphenol were obtained by phase transfer catalysis, using different catalysts and solvents. The molecular weights and yields were determined, showing a solvent effect and a influence of the catalysts used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045326
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  • 2
    Electronic Resource
    Electronic Resource
    Surface resistivity of different silylated glasses (1984)
    Springer
    Journal of applied electrochemistry 14 (1984), S. 803-806 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615271
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  • 3
    Electronic Resource
    Electronic Resource
    Immunogenicity of fatty acid anilides in rabbits and the pathogenesis of the Spanish toxic oil syndrome (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 977-980 
    Details
    ISSN: 1420-9071
    Keywords: Spanish toxic oil syndrome ; oleylanilide ; linoleylanilide ; hypersensitivity ; immunofluorescence ; immunopathogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Fatty acid anilides, the major xenobiotic found in the cooking oils responsible for the Spanish toxic oil syndrome, are immunogenic for rabbits as ascertained by a skin test reaction, the characterization of specific antibodies against anilides and the immunofluorescent detection of ‘anilide dependent antigens’ in tissue slices from treated animals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946468
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  • 4
    Electronic Resource
    Electronic Resource
    Spectrofluorimetric determination of BrO 3 − by oxidation of 1,2,4-trihydroxyanthraquinone-3-carboxylic acid (1984)
    Springer
    Microchimica acta 83 (1984), S. 75-83 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die fluorimetrische Bestimmung von Bromat im Nanogrammbereich auf der Grundlage der Oxydation von 1,2,4-Trihydroxyanthrachinon-3-carbonsäure in schwefelsaurer Lösung wurde beschrieben. Die Fluoreszenz wird bei 585 nm gemessen (Anregung bei 521 nm). Die Erfassungsgrenze liegt bei 5 ng/ml. Das Verfahren ist somit das empfindlichste unter allen bekannten Methoden zur photometrischen bzw. fluorimetrischen Bestimmung dieses Anions.
    Notes: Summary A method is described for the fluorimetric determination of BrO3, at the nanogram level, based on the oxidation of 1,2,4-tri-hydroxyanthraquinone-3-carboxylic acid in sulfuric acid medium. The fluorescence emission is monitored at 585 nm (wavelength of excitation 521 nm). The method shows a detection limit of 5 ng/ml, being the most sensitive of all the established methods for the determination of this anion by photometry and fluorimetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01237262
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  • 5
    Electronic Resource
    Electronic Resource
    A microcomputer-controlled microcalorimeter calibration circuit. I (1984)
    Springer
    Microchimica acta 83 (1984), S. 417-425 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Arbeit beschreibt eine Heizschaltung für die Mikrokalorimetrie, die-von einem Mikrocomputer gesteuert-als Squarewave-Oszillator mit genau bekannter und programmierbarer Frequenz und Periode funktioniert. Die Dauer der Inputimpulse kann mit einer Toleranz von wenigen Mikrosekunden einer willkürlich gehaltenen Periode über eine sehr lange Zeit hinweg eingestellt werden. Die Verwendung dieser Uhr ist nicht auf die Eichung von Mikrokalorimetern beschränkt, sondern kann vilefältiger Natur sein.
    Notes: Summary This paper describes a microcalorimeter heating circuit that is software controlled by a microcomputer operating as a square wave oscillator of very precisely known and programmable frequency and period. The duration of the input pulse of energy can be specified to within a few microseconds of an arbitrarily chosen period over an essentially infinite range. Use of the timer is, of course, not restricted to calibration of microcalorimeters but is general.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01451452
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  • 6
    Electronic Resource
    Electronic Resource
    A microcomputer-controlled microcalorimeter calibration circuit. II (1984)
    Springer
    Microchimica acta 83 (1984), S. 427-435 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktionsenthalpien der Hydrierreaktion dreier einfach-ungesättigter Kohlenwasserstoffe wurden unter Verwendung eines neuartigen, mikro-computer-gesteuerten Einschaltkreises bestimmt. Die Ergebnisse stimmen mit ausgewählten Literaturdaten innerhalb einer mittleren absoluten Abweichung von 0,32 kJ·mol−1 überein. Wir nehmen an, daß der Gesamtfehler für die Bestimmung dieser Reaktionsenthalpien auf dem 95%-Konfidenzniveau etwas kleiner als 1 kJ·mol−1 ist.
    Notes: Summary The heats (enthalpies) of hydrogenation of three simple mono-unsaturated hydrocarbons have been determined using a new microcomputer controlled electrical calibration system. Results agree with selected (“best”) literature values to within an arithmetic mean absolute deviation of 0.32 kJ·mol−1. We believe that the total uncertainty at the 95% confidence level for determination of the enthalpy of hydrogenation of these compounds is somewhat less than 1kJ·mol−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01451453
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  • 7
    Electronic Resource
    Electronic Resource
    Spectrofluorimetric determination of Ga(III) with 1-hydroxy-2-carboxyanthraquinone (1984)
    Springer
    Microchimica acta 84 (1984), S. 79-86 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein neues Verfahren zur fluorimetrischen Bestimmung von Ga(III) mit 1-Hydroxy-2-carboxyanthrachinon bei pH 3,9 in wäßrigem Ethanol wurde ausgearbeitet. Die Fluoreszenz wurde bei 580 nm gemessen (Anregung bei 465 nm). Das Verfahren eignet sich für 50–500 ng/ml. Die Zusammensetzung der Komplexverbindung entspricht dem Verhältnis 1∶1.
    Notes: Summary The fluorescent chelate formed between 1-hydroxy-2-carboxy-anthraquinone and gallium(III) at pH 3.9 has been studied spectrofluorimetrically in an ethanol-water mixture (70/30% V/V). A new method for the fluorimetric determination of gallium(III) is described. The fluorescence is monitored at 580 nm (wavelength of excitation 465 nm) and the range of application of the method is between 50 and 500 ng ml−1. The stoichiometry of the complex has been found to be 1∶1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01204159
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  • 8
    Electronic Resource
    Electronic Resource
    Rapid spectrophotometric determination of chlorate with dimedone bisthiosemicarbazone monohydrochloride (1984)
    Springer
    Microchimica acta 84 (1984), S. 295-302 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Verwendbarkeit von I als Reagens für die rasche und empfindliche spektrophotometrische Bestimmung von 0,5–5,0 ppm Chlorat durch Oxydation von I in 70%iger Perchlorsäure und Messung des gelben Reaktionsproduktes wurde untersucht. Die molare Absorptivität bei 417 nm beträgt 1,86×104 l·mol−1·cm−1. Die relative Standardabweichung beträgt 1,6% für 2,5 ppm Chlorat.
    Notes: Summary Dimedone bisthiosemicarbazone monohydrochloride has been examined to evaluate its usefulness as a reagent for rapid and sensitive Spectrophotometric determination of chlorate (0.5–5.0 ppm) by oxidation of the reagent in 70% perchloric acid medium and measurement of the yellow product. The molar absorptivity at 417 nm is 1.86×104 l·mole−1·cm−1. The relative standard deviation is 1.6% for 2.5 ppm of chlorate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01212394
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  • 9
    Electronic Resource
    Electronic Resource
    Intercalation compounds of trimethylphosphate in graphitic oxide (1984)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 1 (1984), S. 411-417 
    Details
    ISSN: 1573-1111
    Keywords: Graphitic oxide ; trimethylphosphate ; IR spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The intercalation compounds of trimethylphosphate (TMP) in graphite oxide (GO) have been synthezized. Two compounds have been characterized, corresponding to intercalation of one or two molecules of TMP, and have been characterized by gravimetric adsorption, X-ray diffraction and infrared spectroscopy. Bonding between TMP and graphitic oxide takes place through hydrogen bonding with OH groups of the layered material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00665484
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  • 10
    Electronic Resource
    Electronic Resource
    Assessment of earthquake hazard in Panama based on seismotectonic regionalization (1984)
    Springer
    Natural hazards 2 (1984), S. 115-131 
    Details
    ISSN: 1573-0840
    Keywords: Seismic hazard ; seismicity ; probability of occurrence ; probabilistic ; probabilistic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract Assessment of seismic hazard in Panama is made using a seismotectonic regionalization model. The coefficients of Gumbel's Type-I distribution are calculated and return periods for several magnitudes are found. From these coefficients intensities, peak ground acceleration and earthquake hazard for a set of return periods and epicentral distances are estimated and substantial variations in the probability of occurrence are noted. The Panama Fracture Zone (PFZ) and the Panama-South America Suture Zone (PSZ) provinces are the most active in producing earthquakes with a magnitude of about 7.0 in less than 16 yr. Magnitude 7.0 earthquakes in the Azuero province have a return period of about 160 yr, whereas in the Panama Deformed Belt (PDB) province the return period for magnitude 7.5 events is about 175 yr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00141386
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