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  • 1
    Electronic Resource
    Electronic Resource
    Zinkoxyd als Katalysator (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 49-83 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die Lumineszenzfähigkeit und die katalytische Wirksamkeit mit Bezug auf den Methanolzerfall von verschieden hergestellten Zinkoxyden untersucht. Je nachdem, ob man das Zinkoxyd durch thermische Zersetzung von Nitrat oder Carbonat gewinnt, erhält man Produkte von extrem anderen Eigenschaften.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352230107
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  • 2
    Electronic Resource
    Electronic Resource
    Die Adsorption von Chlorid an einem austenitischen Cr-Ni-Stahl bei hohen Temperaturen (1988)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 39 (1988), S. 355-364 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The adsorption of chloride on austenitic Cr-Ni-steel at high temperaturesUsing the radioactive isotope chlorine-36 and nuclear physical measuring methods (gas-flow radiation detector, autoradiography) chloride adsorbed on metal surfaces can be detected with a detection limit of 10-10 g cm-2 and a local resolution of at least 5 μm. This method was developed for investigating the chloride adsorption on the protective layers on an austenitic Cr-Ni-Steel (X 8 CrNiTi 18.10) under high temperature conditions at 250°C. Three different kinds of chloride adsorption could be distinguished: homogeneous chloride distribution across the whole surface, high localized chloride concentrations in places of local corrosion attack and local deposition of chloride by heat and mass transfer. The results obtained enabled attack concepts for the mechanism of action of the chloride were derived. Potential applications of this method to the rapid detection of chlorideinduced corrosion processes (pitting corrosion, stress corrosion cracking or crevice corrosion) or to the quantitative estimation of thermohydraulic concentration processes are mentioned.
    Notes: Durch Verwendung des radioaktiven Isotops Chlor-36 und kernphysikalischer Meßmethoden (Gasdurchflußzählrohr, Autoradiographie) kann an Stahloberflächen adsorbiertes Chlorid mit einer Nach-weisgrenze von 10-10 g/cm2 bei einem lokalen Auflösungsvermögen von mindestens 5 μm nachgewiesen werden. Diese Methode wurde benutzt, um die Chloridadsorption an den Schutzschichten eines austenitischen Cr-Ni-Stahls (X 8 CrNiTi 18 10) bei hohen Temperaturen (250°C) zu untersuchen. Dabei konnten drei unterschiedliche Arten der Chloridadsorption festgestellt werden: gleichmäßig flächenhafter Belag, hohe, örtlich begrenzte Chloridkonzentration an Stellen des lokalen Korrosionsangriffs und lokale Anreicherung von Chlorid durch Wärme- und Stofftransportvorgänge. Aus den Ergebnissen wurden Vorstellungen zum Wirkmechanismus des Chlorids abgeleitet. Auf die Anwendungsmöglichkeiten der Methode zum schnellen Nachweis eines chloridinduzierten Korrosionsprozesses (Lochfraß-, Spannungsriß- oder Spaltkorrosion) bzw. zur quantitativen Bewertung von thermohydraulischen Anreicherungsprozessen wird hingewiesen.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19880390802
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  • 3
    Electronic Resource
    Electronic Resource
    Verbesserte calorimetrische Heizwertbestimmung flüssiger Brennstoffe in Platingefäßchen (1938)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 51 (1938), S. 146-147 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19380511004
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  • 4
    Electronic Resource
    Electronic Resource
    Verbesserungsvorschläge für die Elementarbestimmung von flüssigen Treibstoffen nach der Halbmikromethode (1938)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 51 (1938), S. 147-148 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19380511005
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  • 5
    Electronic Resource
    Electronic Resource
    Molecular configuration of amylose and its complexes in aqueous solutions. Part IV. Determination of DP of amylose by measuring the concentration of free iodine in solution of amylose-iodine complex (1968)
    New York : Wiley-Blackwell
    Biopolymers 6 (1968), S. 27-41 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In aqueous solutions of the amylase-iodine complex the concentration of free iodine [If]v after reaching equilibrium (or closely approximating it) is determined by the following factors: temperature, pH, concentration of iodide ions and amylose, and DP of amylose. In the present paper the role of temperature, amylose concentration, and DP has been investigated. At half-saturation of amylose by iodine, the reciprocal value of free iodine defines the equilibrium constant: 1/[If]v = K. The relation between [If]v, in normality and temperature is the following: 5 + log [If]v = -(2.132/T) + 8.52, for DPn = 1290, 0.4 mg. amylose in 100 ml. 0.1N HCl. The value of the energy of activation Ea between 2 and 52°C. is 9.72 kcal./mole. The influence of amylose concentration [Am] on photometrically determined [If]v, at 20°C, in the range of 0.1-1.2 mg./100 ml. 0.1 N HCl for DPn = 1290 is: 5 + log [If]v = 0.209 - 0.047 log [Am]. At [Am] = 0.6 mg. amylose/ 100 ml. 0.1 N HCl and 20°C, the value of [If]v depends on DPn as follows: 5 + log [If]v = 0.085 = + 0.222 log (104/DPn). These above equations are summarized by the relation: [If]v = exp {16.865 - (Ea/RT)}[Am]0.047(104/DPn)0.222 ×10-5 Considering that the determination of [If]v by automatic photometric titration can be performed quickly and with appropriate reproducibility, this method is convenient for a rapid empirical and approximate determination of DP of amylose on a microscale. The iodine-binding capacity [IBC] as well as the value of λmax, have been also investigated as functions of DPn, by photometric and by amperometric titration.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1968.360060103
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular configuration of amylose and its complexes in aqueous solutions. Part III. Investigation of the DP distribution of helical segments in amylose-iodine complexes (1967)
    New York : Wiley-Blackwell
    Biopolymers 5 (1967), S. 17-26 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The equilibrium normality [If] of free iodine in amylose-iodine complex formation is a function of the length of the polyiodine chains. This length depends on the DP of helical segments of amylose (sDPn). Values of [If] and of the concentration of the bound iodine [Ib] were determined by the continuous photometric titration with automatic recording. Plots of [Ib] versus [If] give an integral distribution curve. Since the relation between [If] and sDPn is known, the graphic differentiation of the [Ib] versus [lf] curve furnishes the differential distribution curve, representing the mass distribution of the helical segments according to their DP. The peak of this curve is characteristic of the percentage and DP of those helical segments, which occur in the largest amount. On the basis of the differential distribution curve the polymolecularity of the investigated sample may be judged. The titration of amylose samples degraded by various methods gives different distribution curves. Titrating mixtures of samples with widely differing average DP values results in differential curves having more than one maximum.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1967.360050104
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular configuration of amylose and its complexes in aqueous solutions. Part II. Relation between the DP of helical segments of the amylose-iodine complex and the equilibrium concentration of free iodine (1967)
    New York : Wiley-Blackwell
    Biopolymers 5 (1967), S. 5-16 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The iodine which is added to an aqueous amylose solution is bound only partly by the amylose while forming the blue complex and partly remains free. The equilibrium normality of the free and the bound iodine at half-saturation of amylose by iodine is designated as [If]v and [Ib]w, respectively. The stability of the poly iodine chain formed within the axis of amylose helices depends on its length, i.e., indirectly on the DP of the amylose helices: the greater this stability, the lower the [If]v value. The amylose molecule consists of helical segments. Such a molecule may behave as a random coil. The average length of the helical segments in freshly prepared amylose-iodine complexes depends on temperature, pH, iodide concentration, the presence of other complex-forming agents, and the DP of the amylose. This latter factor is investigated in the present paper. By the aid of an automatically recording photometrictitrating device the coherent values of [Ib] and [If] were determined. Plotting these values against DPn for mechanochemically degraded as well as for periodateo-xidized amyloses resulted in curves consisting of two linear sections. The break of the curves occurred between DPn 110 and 130. It was concluded that below DPn = 100 the DP of helical segments (= sDPn) is identical to the DPn of the total molecule, i.e., the molecule consists of only a single, relatively stiff helix. Above this limit the molecule contains several helical segments. The DP of these helical segments can be calculated as follows: sDPn = 141.1 - 10.2 × 105[If]v. This equation is considered to be valid for 0.5-0.6 mg. amylose in 100 ml. 0.1N HCl at 20°C., λ = 650 mμ, euuvet diameter 3.4 cm., the feed rate of the iodate-iodide titrating solution (in acid medium resulting in a 5 × 10-3N I2 solution with a molar iodide to iodine ratio of 1.5) is 0.4ml./min. Amylose molecules of, e.g., DPn = 1380 consist of an average of 11.4 segments having a DP of about 120 and consisting of an average of 15-18 helical turns.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1967.360050103
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  • 8
    Electronic Resource
    Electronic Resource
    Molecular configuration of amylose and its complexes in aqueous solutions. IV. Determination of DP of amylose by measuring the concentration of free iodine in solution of amylose-iodine complex (1968)
    New York : Wiley-Blackwell
    Biopolymers 6 (1968), S. 1777-1777 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1968.360061215
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  • 9
    Electronic Resource
    Electronic Resource
    Reaktionen von Aroyl(Hetaroyl)iminodithiokohlesäureestern mit Carbanionen CH-acider Verbindungen (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 675-679 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Dimethyl N-Aroyl(Hetaroyl)carbimidodithioates with Carbanions CH-acidic CompoundsReactions of dimethyl N-aroyl(hetaroyl)carbimidodithioates 1 with carbanions 2 present new possibilities to synthesize 3-acyl-amino-3-methylthio-2-subst.-acrylnitriles 3 by monosubstitution of methylthiogroup.The reaction of 1 with 2-alkyl-benzothiazolium salts 4 yield deeply coloured N-acyl-(2,3-dihydrobenzothiazole-2-yliden) thioacetimido acid-methylates 5 of the 2-subst.-benzothiazoliumperchlorates 6. The structures of the final products are determined by i.r.-, 1H.-n.m.r.- and u.v.-spectra.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250417
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  • 10
    Electronic Resource
    Electronic Resource
    Synthese und Reaktionsverhalten von N-(3-Chlorbenzo[b]-thiophen-2-carbonyl)imino-Dithiokohlensäure-Derivaten (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 633-637 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Reaction Behaviour of N-(3-Chlorobenzo[b]thiophene-2-carbonyl)-imino-dithiocarbonic Derivatives3-Chlorobenzo[b]thiophene-2-carbonyl-chloride 1 was treated with potassium rhodanide to afford the appropriate acyl isothiocyanate 3, which adds nucleophilic agents as amines and thioles in good yields.Addition of methanethiole and subsequent alkylation of the dithiocarbamate 7 gives S, S-dimethylimino-dithiocarbonate 8. 3-Chlorobenzo[b]thiophene-2-carboxamide 2 reacts with carbon disulphide and phenyl isothiocyanate by chlorine substitution and cyclisation to benzo[b]thieno[2, 3-e]thiazines 9, 10 or 11. The structure of the final products were determined by analytical and spectroscopical dates.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260416
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