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  • Wiley-Blackwell  (60)
  • EMBO Press
  • 1
    Electronic Resource
    Electronic Resource
    Spektralanalytische Untersuchungen. XII. Mitteilung. Über den Nachweis von Antimon, Arsen und Tellur (1932)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 209 (1932), S. 356-363 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden Methoden Zum spektralanalytischen Nachweis von Arsen, Antimon und Tellur angegeben: 1In festen Metallproben können etwa 2 · 10-8 g As und 10-7 g Te sicher nachgewiesen werden. Die atomare Nachweisempfindlichkeit ist also für beide Elemente etwa dieselbe und nur wenig geringer als für Metalle.2In schwermetallfreien Flüssigkeiten liegt die Nachweisgrenze bei 0,01% As und 0,002% Te bei Verdampfung von 2 cm3 im Abreißbogen und im Flammenbogen.3Zur Erhöhung der Nachweisbarkeitsgrenze wird eine Abscheidungsmethode für Arsen, Antimon und Tellur ausgearbeitet, welche bei Verwendung von 1 cm3-Lösung mit dem Abreißbogen 0,5 γ As, 0,05 γ Te und 0,05 γ Sb nachweisen läßt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19322090403
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  • 2
    Electronic Resource
    Electronic Resource
    Spektralanalytische Untersuchungen. XII. Mitteilung Die spektrographische Reinheitsprüfung des neuen primären Radiumstandards (1934)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 221 (1934), S. 103-108 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19342210116
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Reaktion von Cyclopropenonen mit Ketenacetalen, II1) Bildung labiler 1:1-Addukte aus Diphenylcyclopropenon bzw. Diphenylcyclopropenthion und Ketenacetalen2-4 (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 562-575 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Cyclopropenones with ketene Acetals, II1) Formation of Labile 1:1-Adducts from Diphenylcyclopropenone and Diphenylcyclopropenethione with Ketene Acetals2-4The reaction of diphenylcyclopropenone (1) and diphenylcyclopropenethione (2) with ketene acetals at room temperature yields 2-azoniabicyclo[3.1.0.]hex-3-en-olates 5. The structure of 5f has been determined by X-ray diffraction techniques. Spectral data are in accord with the structure proposal 5. Compounds 5 can be protonated and alkylated; with nucleophiles opening of the 5-membered ring occurs.
    Notes: Die Reaktion von Diphenylcyclopropenon (1) und Diphenylcyclopropenthion (2) mit Ketenacetalen 3 bzw. 4 liefert bei Raumtemperatur 2-Azoniabicyclo[3.1.0]hex-3-en-3-olate 5. Die Struktur konnte für 5f durch Röntgenstrukturanalyse bewiesen werden. Die spektroskopischen Daten sind mit dem Konstitutionsvorschlag 5 im Einklang. Die Ammonium-acylide lassen sich protonieren und alkylieren; mit nucleophilen Reagentien erfolgt die Öffnung des Fünfrings in den Bicyclen 5.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090220
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  • 4
    Electronic Resource
    Electronic Resource
    Ringverengungsprodukte von substituierten Phloracylophenonen des Humulon- und Lupulinon-Typs (1966)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 99 (1966), S. 3277-3287 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ausgehend von 3-Brom-3.5.5-trimethyl-1-acetyl-cyclohexen-(1)-ol-(2)-dion-(4.6) (4) wurden 2c, das einfachste Analogon des Lupulinons, sowie 8 und 7, die Ringverengungsprodukte von 2c, dargestellt. Durch Oxydation von 7 entstand das einfachste Hulupon-Analogon 6. Die Isomerisierung des Humulons (2d) zu Cyclopentanderivaten wird mit verschiedenen Analoga und 2c verglichen. 2c läßt sich auch sauer isomerisieren. Von der Humulinsäure (3e) und dem Benzylanalogon 9 werden Wasserabspaltungsprodukte erhalten.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19660991030
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Reaktion von Cyclopropenonen mit Ketenacetalen, III1) Thermische Umwandlung der labilen 1:1-Addukte aus Diphenylcyclopropenon bzw. Diphenylcyclopropenthion und Ketenacetalen2, 3) (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 576-596 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Cyclopropenones with Ketene Acetals, III1) Thermal Rearrangement of the Labile 1:1-Adducts from Diphenylcyclopropenone and Diphenylcyclopropenethione with Ketene Acetals2, 3)Diphenylcyclopropenone (1) and diphenylcyclopropenethione (2) react with ketene acetals 3 and 7 at elevated temperature to give stable 1:1-adducts with the structure of cis-2,4-pentadienamides 6 and 8. 2-Azoniabicyclo[3.1.0]hex-3-en-3-olates, earlier described thermally unstable 1:1-adducts, are intermediates in these reactions. The structure of 6 has been proven by hydrolysis, ozonolysis, and hydrogenation. In two cases the cis-2,4-pentadienamides 6 isomerize to the trans-isomers 9.
    Notes: Bei höherer Temperatur setzen sich Diphenylcyclopropenon (1) und Diphenylcyclopropenthion (2) mit Ketenacetalen 3 bzw. 7 zu stabilen 1:1-Addukten um, denen die Konstitution von cis-2,4-Pentadienamiden 6 bzw. 8 zukommt. Die früher beschriebenen thermolabilen 1:1-Addukte (2-Azoniabicyclo[3.1.0]hex-3-en-3-olate bzw. -thiolate) sind Zwischenprodukte der Reaktion. Die Konstitution 6 wird durch Hydrolyse-, Ozonolyse- und Hydrierungsreaktionen bewiesen. In zwei Fällen unterliegen die cis-2,4-Pentadienamide 6 thermischen cis-trans-Isomerisierungen zu 9.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090221
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  • 6
    Electronic Resource
    Electronic Resource
    Thermodynamics of miscible polymer blends using a concentration-dependent χ parameter (1988)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 26 (1988), S. 1769-1780 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Flory equation-of-state theory, as expressed by Patterson and co-workers, has been applied to two miscible polymer blends: poly(vinyl chloride)/poly(ε-caprolactone) and poly(methyl methacrylate)/poly(vinylidene chloride). For both blends, the variation of the polymer-polymer interaction parameter, χ′23, as a function of composition, is mostly small and can be accounted for by the Flory theory. However, for poly(vinyl chloride)/poly(ε-caprolactone) blends, at high poly(ε-caprolactone content), the large variation of χ′23 as a function of concentration can be explained by a variation of the surface-to-volume ratio of the polymers in the mixture with blend composition. The variations of the surface-to-volume ratios determined in this study agree with those reported in the literature using small-angle x-ray scattering.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1988.090260816
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  • 7
    Electronic Resource
    Electronic Resource
    Thermodynamic study of poly(vinyl chloride)/polyester blends by inverse-phase gas chromatography at 120°C (1986)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 24 (1986), S. 2565-2582 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polymer/polymer interaction parameters χ′23 have been measured at 120°C as a function of polymer concentration for six different poly(vinyl chloride)/linear aliphatic polyester blends. The technique used is inverse-phase gas chromatography with several molecular probes. The polymers investigated are poly(DL-lactide), poly(ethylene succinate), poly(ethylene adipate), poly(butylene adipate), poly(δ-valerolactone), poly(ε-caprolactone) and poly(hexamethylene sebacate). Probe/polymer interaction parameters χ12 and polymer/polymer interaction parameters χ′23 values are dependent upon the methylene to carbonyl ratio of the polyester, reaching a minimum for a value of 5, this ratio corresponding to poly(ε-caprolactone) blends. Results are interpreted in terms of pairwise interactions between carbonyl, methylene, and [CHCl] groups.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1986.090241113
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  • 8
    Electronic Resource
    Electronic Resource
    Evaluation of AES depth profiles of thin-film systems by application of novel graphically interactive factor analysis softwareThis work was presented at ECASIA 91, 14-18 October 1991, Budapest, Hungary (1993)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 20 (1993), S. 519-523 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Factor analysis has proved to be a powerful tool for the full expolitation of the chemical information included in the peak shapes and peak positions of spectra measured during AES depth profiling. Owing to its ability to extract the number of independent chemical components, their spectra and depth distributions, it is increasingly used in routine analysis. However, one has to be aware of the crucial role of the analyst in selecting the physically relevant result from the indefinite number of mathematical solutions. For this reason, he must be put in a position to define the matrix rotation and to check the resulting factors in a fast, flexible and transparent way. Therefore, factor analysis software offering a graphically interactive user interface has been devleoped. During the necessary rotations in factor space both the depth distributions and the corresponding spectra are displayed simultaneously, so that the analyst can judge the physical relevance of the solution and can quickly respond with the necessary adjustments.To demonstrate the capabilities of the software in the evaluation of AES depth profile data, a TiN/Ti/SiO2 layer sequence form microelectronics technology was chosen. As an important result, additional layers are recognized at the interfaces. This example demonstrates the advantages of factor analysis and emphasizes the necessity of the analyst's knowledge on both AES spectra and hte investigated material systems. In addition, it shows the importance of a fast, direct, transparent and interactive interface between the analyst and the mathematical tool of factor analysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740200606
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  • 9
    Electronic Resource
    Electronic Resource
    Kernmethylierung von Phloracetophenon Über Bestandteile von Filix mas III. Mitteilung, W. Rield, Liebigs ann. Chem. 585, 32 (1954). und über Hopfenbitterstoffe VIIVI. Mitteilung, W. Rield, Liebigs ann. Chem. 585, 38 (1954). (1954)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 585 (1954), S. 209-219 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19545850120
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  • 10
    Electronic Resource
    Electronic Resource
    Synthesen in der Reihe des 2,4,5,7-Tetrahydroxy-diphenylenoxyds. Über Usninsäure I (1955)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 597 (1955), S. 148-152 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19555970210
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