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  • Inorganic Chemistry  (16)
  • General Chemistry  (4)
  • Physics  (1)
  • batch cultivation  (1)
  • Wiley-Blackwell  (22)
  • 11
    Electronic Resource
    Electronic Resource
    Über Fluorchemie. XVI. Wäßrige Lösungen von Antimontrifluorid und von Fluorwasserstoff als Fluorierungsmittel in der Silicium- und in der Kohlenstoffchemie (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 330 (1964), S. 195-209 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aqueous solutions of SbF3 exhibit strong fluorinating properties even against easily hydrolyzable methyl chlorosilanes and -silanoles. The fluorination probably proceeds through the preceding hydrolysis of Si—Cl bonds yielding silanole groups. The influence o BF3 · 2 H2O on the fluorination by means of aqueous SbF3 has been studied.C—Cl bonds do not react with SbF3 solutions, in aqueous hydrogen fluoride containing 20-40 weight per cent HF, however, the formation of C—F groups occurs at room temperature. The Si—O—Si bond of methyl chlorodisiloxanes is cleaved by diluted HF, but not by aqueous SbF3.
    Notes: Einfache stark hydrolyseempfindliche Methylchlorsilane und -silanole werden über raschenderweise von wäßrigen Antimontrifluoridlösungen fast ebenso gut fluoriert wie von der wasserfreien Verbindung. Methylchlordisiloxane werden zwar von verdünnter Flußsäure, dagegen nicht von wäßriger Antimontrifluoridlösung gespalten. Der Fluorierung der Si—Cl-Bindung geht offenbar die Hydrolyse zum Silanol voraus. Der Einfluß von Bortrifluorid-dihydrat auf die Fluorierung in wäßriger Antimontrifluoridlösung wird untersucht. Im Gegensatz zur Si—Cl- wird die C—Cl-Bindung von wäßriger Antimontrifluoridlösung nicht, von 20- bis 40proz. Flußsäure bei Raumtemperatur merklich fluoriert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19643300312
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  • 12
    Electronic Resource
    Electronic Resource
    Über Silikone. C. Darstellung von Organopentafluorosilicaten aus wäßrigen Lösungen (1965)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 341 (1965), S. 41-48 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The preparation of alkali metal and NH4 organopentafluorosilicates, Me2[RSiF5], from aqueous solutions has been achieved by direct interaction between organotrifluorosilanes and inorganic fluorides and by precipitation from solutions of easily soluble organopentafluorosilicates by means of cations forming slightly soluble complex salts. Some metal fluorides were used as both fluorinating and complexing reactants, allowing thus one-step preparations.
    Notes: Organopentafluorosilicate können in wäßriger Lösung entweder unmittelbar durch Umsetzen der Organotrifluorosilane mit Fluoriden oder durch Ausfällen aus Lösungen leicht löslicher Organopentafluorosilicate mit schwerlösliche Komplexsalze bildenden Kationen dargestellt werden. Da die komplexbildenden Metallfluoride z. T. selbst Fluorierungsmittel sind, können die Fluorierung trifunktioneller Organosilane und die Komplexbildung in einer Stufe erfolgen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19653410107
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  • 13
    Electronic Resource
    Electronic Resource
    Darstellung, Isolierung und Charakterisierung von Selenan- und Tellurandisulfandiphosphonat (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 429 (1977), S. 270-274 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, isolation, and characterization of Monoseleane and Disulphane-DiphosphonateThe barium salts of monoselenane and monotellurane disulphanediphosphonate are isolated in pure state for the first time. They are characterized by analytical data and i.r. spectra.
    Notes: Monoselenan- und Monotellurandisulfandiphosphonat werden erstmals in reiner Form als Bariumsalze isoliert. Die Charakterisierung erfolgt auf Grund der Analysendaten und der IR-Spektren.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774290133
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  • 14
    Electronic Resource
    Electronic Resource
    Über Silikone. LXV. Trennung von (azeotropen) Gemischen aus Silicium-tetrachlorid und Trimethylchlorsilan durch Fluorieren in wäßriger Lösung (1963)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 325 (1963), S. 149-155 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aceotropic mixtures of SiCl4 and (CH3)3SiCl can be separated by reaction with aqueous HF. (CH3)3SiF is escaping from the reaction mixture in the pure state, whereas HCl and SiF4 (resp. H2SiF6) are remaining in the aqueous solution. Instead of HF, soluble fluorides as NII4F and NH4BF4 can be used, too; the yields are, however, smaller.
    Notes: Gemische von Siliciumtetrachlorid und Trimethylchlorsilan können durch Umsetzen mit wäßriger Flußsäure getrennt werden. Während dabei gebildetes Trimethylfluorsilan in reiner Form entweicht, werden Chlorwasserstoff und Siliciumtetrafluorid (als H2SiF6) von der wäßrigen Lösung festgehalten. Außer HF eignen sich zu dieser Trennung auch andere, in Wasser gelöste Fluoride, wie NH4F oder NH4BF4. Mit diesen sind aber die Ausbeuten weniger hoch.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19633250307
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  • 15
    Electronic Resource
    Electronic Resource
    WO3 - seine Züchtung und kristallographische Untersuchung (1966)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 346 (1966), S. 113-126 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By means of chemical transport reactions (with HCl, Cl2 or CCl4 at 650-1110°C) and by crystal growth from molten solutions (WO3—Na3AlF6, —NaPO3, —Li2MoO4), WO3 single crystals have been prepared and characterized by suitable methods. With the transport method, well-ordered single crystals of good morphological qualities were obtained.
    Notes: Unter Verwendung chemischer Transportreaktionen und der Schmelzlösungskristallisation gelang die Züchtung von WO3-Einkristallen. Als Transportgase dienten HCl, Cl2 und CCl4 (geschlossenes System), und das untersuchte Temperaturgebiet lag zwischen 650 und 1100°C. Zur Schmelzlösungszüchtung dienten die binären Systeme WO3—Na3AlF6, —NaPO3 und —Li2MoO4. Die erhaltenen Kristalle werden röntgenographisch, morphologisch und mikroskopisch untersucht sowie ihr Idealitätsgrad abgeschätzt. Insbesondere durch Anwendung chemischer Transportreaktion werden WO3-Einkristalle erhalten, die infolge ihrer morphologischen Ausbildung und des geringen Störungsgrades zu wissenschaftlichen Grundlagenforschungen herangezogen werden können.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19663460302
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  • 16
    Electronic Resource
    Electronic Resource
    Degradation of chloro- and methyl-substituted benzoic acids by a genetically modified microorganism (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 51 (1996), S. 528-537 
    Details
    ISSN: 0006-3592
    Keywords: chlorobenzoic acid ; methylbenzoic acid ; genetically modified strain ; Pseudomonas sp. B13 FR1 SN45P ; batch cultivation ; chemostat ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Degradation of 3-chlorobenzoic acid (3CB), 4-chlorobenzoic acid (4CB), and 4-methylbenzoic acid (4MB) as single substrates (carbon sources) and as a substrate mixture were studied in batch and continuous culture using the genetically modified microorganism Pseudomonas sp. B13 FR1 SN45P. The strain was able to mineralize the single compounds as well as the substrate mixture completely. Conversion of the three compounds in the substrate mixture proceeded simultaneously. Maximum specific substrate conversion rates were calculated to be 0.9 g g-1 h-1 for 3 CB and 4CB and 1.1 g g-1 h-1 for 4MB. Mass balances indicated the transient accumulation of pathway intermediates during batch cultivations. Hence, the rate limiting step in the degradative pathway is not the initial microbial attack of the original substrate or its transport through the cell membrane. Degradation rates on 3CB were comparable to those of the parent strain Pseudomonas sp. B13. The stability of the degradation pathways of strain Pseudomonas sp. B13 FR1 SN45P could be demonstrated in a continuous cultivation over 3.5 months (734 generation times) on 3CB, 4MB, and 4CB, which were used as single carbon sources one after the other.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Grazer Hochschulen. Chemisches Colloquium am 22. Mai 1944 (1944)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 57 (1944), S. 126-126 
    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.19440571706
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  • 18
    Electronic Resource
    Electronic Resource
    Spherulite boundary strengthening concept for toughening polypropylene (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 36 (1998), S. 2047-2056 
    Details
    ISSN: 0887-6266
    Keywords: polypropylene ; spherulite ; cocrystallization ; lamellae ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: During spherulitic crystallization of polymers, there is a tendency for low molecular weight and other less crystallizable entities to be rejected from the body of the spherulites. This rejection process causes a segregation of these species to those areas where spherulites impinge. As a result of this segregation, lamellar and spherulite boundaries have a tendency to become weak, often resulting in premature mechanical failure. The objective of this work, anthropomorphically speaking, is to develop a melt miscible blend system in which a propylene copolymer “fools” a polypropylene homopolymer into rejecting the copolymer to the spherulite boundaries as an impurity. However, once the copolymer arrives at these boundaries, the copolymer subsequently connects adjacent spherulites through cocrystallization of the propylene copolymer segments. It was found that addition of either a random ethylene-propylene copolymer or an isotactic-atactic block copolymer was able to yield the desired effect. Cocrystallization was confirmed by calorimetry, and segregation of copolymer and subsequent reinforcement at the spherulite boundaries was directly observed microscopically. Using this approach, toughness was increased with little loss in stiffness. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 2047-2056, 1998
    Additional Material: 8 Ill.
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  • 19
    Electronic Resource
    Electronic Resource
    IV. Bericht über die Ausstellung in der Technischen Hochschule (1900)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 13 (1900), S. 1103-1108 
    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.19000134404
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  • 20
    Electronic Resource
    Electronic Resource
    Ein alternativer Weg zur Darstellung von Bi2Sr2CaCu2Ox, YBa2Cu3O7-δ, und YBa2Cu3-xMxO7-δ (M = Ni, Ag und x ≤ 33 Mol%)Professor Rudolf Hoppe zum 70. Geburtstage gewidmet (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 616 (1992), S. 186-190 
    Details
    ISSN: 0044-2313
    Keywords: Preparation of quaternary copper oxides ; high Tc superconductors ; characterization by X-ray powder methods ; AC- and DC-susceptibility ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Alternative Method for Preparation of Bi2Sr2CaCu3Ox, YBa2Cu3O7-δ, and YBa2Cu3-xMxO7-δ (M = Ni, Ag and x ≤ 33 Mol%)Oxidation of quenched melts of metals in a well defined argon/oxygen atmosphere has been found as an alternative method to prepare hight purity samples of Bi2Sr2CaCu2Ox without Pb-stabilization. A special equipment for the oxidation of powder samples will be described. By our new method it is also possible to prepare YBa2Cu3O7-δ and derivatives of this compound, where Cu is substituted by high amounts of Ni or Ag.
    Notes: Es wird eine alternative Präparationsmethode beschrieben, die es ermöglicht, durch Oxidation abgeschreckter Metallschmelzen in einer Sauerstoff-Argon-Strömungsapparatur sehr saubere, nicht Pb-stabilisierte Bi2Sr2CaCu2Ox-Präparate herzustellen. Dieser Weg ist auch für die Darstellung von YBa2Cu3O7-δ und Substitutionsderivaten dieser Verbindung mit hohen Konzentrationen an Ni oder Ag geeignet.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926161030
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