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  • Chemistry  (20)
  • Atomic and molecular processes in external fields, including interactions with strong fields and short pulses  (2)
  • 2010-2014  (2)
  • 1985-1989  (7)
  • 1975-1979  (10)
  • 1965-1969  (3)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Quantitative analysis of ethylenediamine in plasma by capillary column gas chromatography (1986)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 9 (1986), S. 548-554 
    Details
    ISSN: 0935-6304
    Keywords: Gas liquid chromatography (GLC) ; Fused silica capillary columns ; Alkali flame ionization detection (AFID) ; Mass spectrometry (MS) ; Quantitation in human serum ; Ethylenediamine ; Aminophylline ; Small molecular weight amines and diamines ; m-Toluoyl derivatives ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A specific and sensitive method for the determination of ethylenediamine in human plasma is described. The aqueous sample is treated with m-toluoyl chloride, yielding the N,N′-bis(m-toluoyl) derivative of the diamine, which is extracted into dichloromethane and quantitated after “on column” methylation by capillary gas liquid chromatography with alkali flame ionization detection. The corresponding derivative of putrescine serves as internal standard. The assay is reproducible and calibration curves are linear over the concentration range 0.05 to 10 μg · ml-1. The lower detection limit is about 10 ng · ml-1. The structures of the compounds of interest eluting from the capillary column are examined by gas liquid chromatography/mass spectrometry. The assay has been applied to the analysis of ethylenediamine in plasma following the administration of aminophylline and ethylenediamine in a cross-over study to patients with bronchopulmonary diseases. The method also proves suitable for measuring other primary and secondary amines and diamines in aqueous solutions by gas liquid chromatography.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240091002
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  • 2
    Electronic Resource
    Electronic Resource
    Continuous reactive processing I: Reactive coating (1985)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 25 (1985), S. 541-547 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The big success of the reaction injection molding (RIM) process has brought about a marked interest in reacting polymer processing. In the present work, we study the technical feasibility of a continuous process to coat metallic conductors using reacting polymers. In the envisioned system, RIM type reactants are mixed and then injected into a tubular reactor through the center of which we pass the cable to be coated. The predictions of the mathematical model developed show that a feasible process can be designed by adequate control of the heat transfer phenomena. The process needs in general, a low reactor temperature and a high cable temperature.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760250906
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  • 3
    Electronic Resource
    Electronic Resource
    Suspension polymerization of vinyl chloride. I. Influence of viscosity of suspension medium on resin properties (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 37 (1989), S. 145-166 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The suspension polymerization of vinyl chloride is studied in a bench-scale reactor adequately reproducing reaction conditions and resin properties of industrial relevance. The evolution of particle morphology is analyzed at different stages of conversion, and a model for particle formation is verified. The influence of viscosity of the suspension medium is analyzed in relation to molecular weight distribution and particle morphology.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1989.070370111
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  • 4
    Electronic Resource
    Electronic Resource
    Photochemie und Photophysik von 3-(2-Isoxazolinyl)-phenylketonenHerrn Prof. Dr. E. Schmitz zum 60. Geburtstag gewidmet (1988)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 330 (1988), S. 735-747 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photochemistry and Photophysics of 3-(2-Isoxazolinyl)-phenylketones3-Benzoyl-Δ2-1,2-oxazolines (1-6) are formed by 1,3-dipolar cycloaddition between benzoylnitril-N-oxide (8) and dihydrofurane 9 or 1,3-dioxep-5-enes (10a-c). The preparative yields are small due to the competitive dimerization of the dipole 8. Two stereoisomers are obtained by using 2-substituted 1,3-dioxep-5-enes as dipolarophiles. The different steric position of the substituents in 3-6 gives rise to different spectral data. The synthesized ketones possess triplet states with a high degree of charge transfer character. Therefore, the ability to H-abstraction reaction from alcohols is small. For ketone 2 and methanol as H-donor a rate constant of kHMeOH = 4,1 · 102 M-1s-1 is determined. Also by electron transfer reactions with triethylamine and some onium compounds the reactivity of the T1 of the ketones 1-6 is less compared to those of nπ* excited ketones. The photolysis of the ketones takes place very unselectively and leads to a product mixture. The quantum yields for the decay of the ketones are 10-2 to 10-3.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19883300508
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  • 5
    Electronic Resource
    Electronic Resource
    Substituierte 3,4-Diamino-thieno[2,3-b]pyrrole (1986)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 328 (1986), S. 459-464 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Substituted 3,4-Diamino-thieno[2,3-b]pyrroles
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19863280325
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  • 6
    Electronic Resource
    Electronic Resource
    Metallcarbonylkomplexe mit mehrzähnigen ringförmigen Liganden. I. Pentacarbonylkomplexe des s-Trithians und verwandter VerbindungenProfessor Fritz Seel zum 60. Geburtstage am 21. September 1975 gewidmet (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 416 (1975), S. 311-317 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Carbonyl Metal Compounds with Polydentate Cyclic Ligands. I. Pentacarbonyl Complexes of s-Trithiane and Related CompoundsThe complexes (RCHS)nM(CO)5 (R = H, CH3, n = 3; R = H, n = 4; M = Cr, Mo, W) were prepared from the tetrahydrofuran pentacarbonyl metal compounds and the respective ligands. The Cotton-Kraihanzel force constants of these complexes indicate the sulfur ligands to be slightly more basic than triphenylphosphine. The trimethyltrithiane complexes (R = CH3, n = 3) exhibit rapid intramolecular exchange of the M(CO)5-group along the three coordination centers of the ligand.
    Notes: Die Komplexe (RCHS)nM(CO)5 (R = H, CH3, n = 3; R = H, n = 4; M = Cr, Mo, W) wurden aus den Tetrahydrofuran-pentacarbonylmetallverbindungen und dem jeweiligen Liganden dargestellt. Die Cotton-Kraihanzel-Kraftkonstanten dieser Komplexe weisen die Schwefelliganden als geringfügig schwächere Akzeptoren, verglichen mit Triphenyl-phosphin, aus. Die Komplexe des Trimethyltrithians (R = CH3, n = 3) zeigen einen raschen intramolekularen Austausch der M(CO)5-Gruppe über die drei Koordinationsstellen des Liganden.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754160316
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  • 7
    Electronic Resource
    Electronic Resource
    Über einige Substitutionsreaktionen am trimeren ThioformaldehydProfessor Carl Mahr zum 75. Geburtstage am 22. Dezember 1975 gewidmet. (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 418 (1975), S. 208-216 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Some Substitution Reactions of Trimeric ThioformaldehydeTreatment of s-trithiane with n-butyllithium results in the formation of lithium salts of carbenium ions. Their reactions with the halo-functional compounds lead to mono- or multi-substituted trithianes besides lithium chloride.
    Notes: Die Behandlung von s-Trithian mit n-Butyllithium führt zu Lithiumsalzen von Carbanionen. Bei der Umsetzung mit den halogenfunktionellen Verbindungen CH3J. (CH3)3SiCl, (CH3)3GeCl, (CH3)3SnCl und (CH3)2SiCl2 reagieren diese unter Abspaltung von LiCl zu ein- oder mehrfach substituierten s-Trithianen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754180303
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  • 8
    Electronic Resource
    Electronic Resource
    Die Lösungsmittelfreie Schnellsynthese von reinem Bis-brommethylsulfid (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 146-148 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Rapid Synthesis of Very Pure Bis-Bromo-Methylsulfide without SolventBis-bromo-methyl sulfide is produced by the direct reaction of thioformaldehyde with elemental bromium. High quantities of the pure compound are obtained, when it is purified by distillation.
    Notes: Bis-brommethylsulfid entsteht bei der direkten Reaktion von Thioformaldehyd mit elementarem Brom. Bei der anschließenden Destillation erhält man die Verbindung in hohen Ausbeuten und in reiner Form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370118
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  • 9
    Electronic Resource
    Electronic Resource
    Zum nukleophilen Abbau von Tris(pentasulfido)platinat(IV), [Pt(S5)3]2-, und Bis(pentasulfido)platinat(II),[Pt(S5)2]2- (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 452 (1979), S. 112-122 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Nucleophilic Degradation of Tris(pentasulfido)platinum(IV), [Pt(S5)3]2-, and Bis(pentasulfido)platinum(II), [Pt(S5)2]2-The behaviour of [Pt(S5)3]2-, (I), towards sulfite, arsenite, sulfide, hydroxide, and triphenylphosphine has been studied qualitatively and quantitatively. With stoichiometric amounts of nucleophile one ring is degraded; the reaction product [Pt(S5)2]2-, (II), can be isolated. With excess of nucleophile all sulfur atoms are taken off from the platinum; with triphenylphosphine, however, (PPh3)2PtS4, (III), is formed. A mechanistic interpretation of the course of the reaction is given and supported by kinetic studies.
    Notes: Das Verhalten von [Pt(S5)3]2-, (I), gegenüber Sulfit, Arsenit, Sulfid, Hydroxid und Triphenylphosphin wird qualitativ und quantitativ untersucht. Mit stöchiometrischen Mengen an Nukleophil wird ein Ring abgebaut; als Reaktionsprodukt kann [Pt(S5)2]2-, (II), isoliert werden. Mit Überschuß an Nukleophil werden alle Schwefelatome vom Platin abgelöst; mit Triphenylphosphin entsteht dagegen (PPh3)2PtS4, (III). Der Reaktionsablauf wird mechanistisch gedeutet und durch kinetische Untersuchungen erhärtet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794520116
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  • 10
    Electronic Resource
    Electronic Resource
    Isomerieerscheinungen am Tris-trimethylsilyl-substituierten s-Trithian (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 159-161 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Isomerizations of Triple Substituted s-TrithianeTreatment of triple silyl-substituted s-trithiane with n-butyllithium results in the formation of lithium salts of carbenium ions. Their reactions with water or heavy water lead to isomers of 2,4,6-tris-(trimethylsilyl)-s-trithianes.
    Notes: Dreifach silyliertes s-Trithian wird mit überschüssigem n-Butyllithium umgesetzt. Die entstehenden Lithiumsalze von Carbanionen ergeben bei Zusatz von Wasser bzw. Deuteriumoxid Isomere des 2,4,6-Tris-(trimethylsilyl)-s-trithians.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370121
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