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  • 1
    Electronic Resource
    Electronic Resource
    Low-temperature matrix-isolation infrared spectroscopy - a method to characterize reactive species from low-pressure pyrolysis of hydrocarbons for mechanistic elucidations
    Amsterdam : Elsevier
    Journal of Analytical and Applied Pyrolysis 23 (1992), S. 265-286 
    Details
    ISSN: 0165-2370
    Keywords: Hydrocarbons ; IR spectroscopy ; matrix isolation ; proof and characterization of radicals ; pyrolysis.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0165-2370(92)80021-D
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  • 2
    Electronic Resource
    Electronic Resource
    On the mechanism of inhibition-initiation during pyrolysis of hydrocarbon mixtures
    Amsterdam : Elsevier
    Journal of Analytical and Applied Pyrolysis 17 (1990), S. 201-215 
    Details
    ISSN: 0165-2370
    Keywords: Hydrocarbons ; kinetics ; mixtures ; pyrolysis.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0165-2370(90)85010-K
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  • 3
    Electronic Resource
    Electronic Resource
    382. COLD — Ein System zur bettseitigen Messung des extravasalen Lungenwassers (1983)
    Springer
    Langenbeck's archives of surgery 361 (1983), S. 919-919 
    Details
    ISSN: 1435-2451
    Keywords: Pulmonary edema ; ARDS ; Thermo-dye-dilution technique ; Lungenödem ; ARDS ; Thermo-Dye Technik
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird ein prozessor-gesteuertes System beschrieben, das in klinischer Anwendung des „Thermo-Dye”-Dilutons-Verfahrens die frühe Erfassung des Lungen-ödems erlaubt. Die Verwendung eines 5 F Ø-Katheters zur gleichzeitigen Messung beider Indikatoren in der A. desc. gewährleistet eine erhebliche Verringerung des bakteriellen Kontaminationsrisikos und eine Verbesserung bei zusätzlicher Messung der O2-Sättigung gegenüber der meist angewendeten Meßmethode mit Blutabzug. Zudem wird die Empfindlichkeit und Reproduzierbarkeit der Methode merklich erhöht durch die Verbindung der in-situ Messung mit einer prozessor-gesteuerten Indikatorinjektion zu einem genau definierten Zeitpunkt der Phasenlagen von Kreislauf und Atmung.
    Notes: Summary A processor-controlled system is described that employs the “thermodye” dilution technique for the early detection of pulmonary edema in patients. Use of a 5-French catheter for the simultaneous detection of both the thermal and dye tracers in the descending aorta ensures essential improvements as regards the risks of bacterial contamination and the possibility of oxygen saturation measurement as compared to the prevalent intra-arterial and extracorporal split-detection techniques. Furthermore, the in situ tracer detection near the exit in combination with a system-controlled injection of the indicators, synchronized to definite circulatory and respiratory states, noticeably enhances the sensitivity and reproducibility of the method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276208
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Pyrolyse von Cycloalkenoaromaten (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 607-615 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Pyrolysis of CycloalkenoaromaticsThe products of pyrolysis of tetraline (1), indane (2), 2-methylindane (3), and tetrahydroacenaphthene (4) in mixtures of n-paraffins were analyzed by gas chromatography. Results show that by temperatures between 700° and 800°C and residence times of about 0.2 s more than 80% of the reaction products are aromatics. The main pathway of the decomposition of 1, 2, and 4 is the dehydrogenation in direction to the corresponding complete aromatic systems or indene respectively. In the case of 3 we found less than 10% of 2-methylindene but more than 40% of skeleton isomeres. The formation of skeleton isomeres can be explained by the concept of radical rearrangements.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230412
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Pyrolyse von 1-14C-Pent-1-en (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 283-292 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Pyrolysis of 1-14C-Pent-1-eneIn the thermal decomposition of 1-14C-pent-1-ene at 550 to 650°C a mixture of saturated and olefinic hydrocarbons ≤ C6 is formed. The reaction products were analyzed by gaschromatography, the distribution of radioactivity in the main products by radio gaschromatography.The results are discussed on the basis of a conventional radical reaction scheme including 1.4- and 1.5-H-shifts in intermediate alkyl and alkenyl radicals. The distribution of pyrolysis products and of their radioactivity allows a semiquantitative description of the complex decomposition of n-pent-1-en.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250215
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  • 6
    Electronic Resource
    Electronic Resource
    Über die Pyrolyse von Pent-1-en-3,3-d2 (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 375-381 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Pyrolysis of Pent-1-ene-3,3-d2The distribution of deuterium in the main products of the thermal decomposition of pent-1-ene-3,3-d2 at 550 to 650°C was studied and interpreted. The results include conclusions on kinetic isotope effects, on relative reactivities of different C—H-bonds, and on the importance of nonterminal radical addition. It is shown that butadiene-d2 detected in the isotopically labeled butadiene fraction is a reliable target molecule for the homoallylic rearrangement of the pent-1-ene-4-yl-3,3-d2 radical.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250305
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  • 7
    Electronic Resource
    Electronic Resource
    Reaktionen von Cyclanyl-Radikalen in der Gasphase. I. Cyclohexyl-Radikale aus AzocyclohexanHerrn Prof. Dr. J. Ulbricht zum 60. Geburtstag gewidmet (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 561-571 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Cyclanyl Radicals in the Gas Phase. I. Cyclohexyl Radicals from AzocyclohexaneBy theorem cyclothexyl radicals can react to yield the three isomeric C6H11-radicals: 5-hexenyl-, resonance-stabilized propyl allyl-, and cyclopentylmethyl radical.This is not sufficient a basis to explain the amount of propylene by the conversion of cyclohexenyl radicals at high temperatures. For this reason we have studied the decomposition behaviour and all other types of reactions of cyclohexyl radicals from azocyclohexane as radical source in a flow system between 400 and 480°C and in part more.The most important result is the evidence of the 3-methylcyclopentyl radical as an essential reaction intermediate.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260406
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  • 8
    Electronic Resource
    Electronic Resource
    Experimentelle und theoretische Untersuchungen an Kohlenwasserstoffen der Formel C5H6: Pyrolyse von Cyclopenta-1,3-dienHerrn Prof. Dr. Dr. H. G. O. Becker zum 65. Geburtstag gewidmet. (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 511-519 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Experimental and Theoretical Investigations on Hydrocarbons of the Formula C5H6: Pyrolysis of 1,3-CyclopentadieneThe details of high temperature chemistry of the conversion of 1,3-cyclopentadiene (CPD) are unknown. Therefore the pyrolysis of CPD was studied under various reaction conditions in labscale dimension. The attempt to interpret the composition of the reaction products only on the basis of convenient axiomes does not seem satisfactory. For that reason heats of formation and relative stabilities for 25 closed and open shell hydrocarbons of the formula C5H6 were calculated using the MINDO/3 procedure. These enthalpy values were used to estimate heats of reactions for selected start steps of the pyrolysis of CPD. The molecular-assisted hydrogen transfer under formation of cyclopentadienyl and cyclopentenyl radicals ought to be one of the most important reaction steps.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290318
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  • 9
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Thermischen Umsetzung von Phenylcyclopentan, -hexan, -heptan und -octan in der Gasphase Teil der Dissertation A von Herrn Ho Són Lam, Akademie der Wissenschaften der DDR, Berlin-Leipzig 1983. (1985)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 759-766 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies on Thermal Conversion of Phenyleyclopentane, -hexane, -heptane, and -octane in the Gas PhaseThe title compounds were pyrolyzed from 700 to 780°C in a metallic laboratory tubular reactor in the presence of steam. The reaction products were analyzed by gas chromatography and by a combination of gas chromatography and mass spectrometry. From the phenylcyclanes tested, more than 65 hydrocarbons could be detected in the liquids, besides gaseous reaction products. In most cases unambiguous structures could be derived by using different analytical methods.As typical initial-step products phenylcyclenes, ω-phenyl-1-alkenes and 1-phenyl-1-alkenes are formed by dehydrogenation and isomerization of the title compounds. The detection of phenylalkenes corresponds well with the isomerization of unsubstituted cyclanes to the corresponding α-olefines described in former papers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19853270508
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchungen über den Thermischen Zerfall von n-Dodecylcyclopentan in der Gasphase (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 964-972 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Investigations on the Thermal Decomposition of n-Dodecylcyclopentane in the Gas PhaseIn the thermal decomposition of n-dodecylcyclopentane at 670 and 750°C in a laboratory tubular reactor mixtures of hydrogen and 57 and 113 hydrocarbons respectively are formed. The mixtures have been analyzed and identified by capillary gas chromatography and by mass spectrometry. The distribution of the reaction products is used for mechanistic discussions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240615
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