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  • 1
    Electronic Resource
    Electronic Resource
    Reaction of α-cellulose with SbCl3-KOH-AsCl3Prod. No. 1637 (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 2467-2471 
    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: α-Cellulose dissolves in a mixture of SbCl3, KOH, and AsCl3. The resulting product as identified by PMR and infrared spectroscopy is α-D-glucose. This product is unexpected, and an explanation for its formation is suggested.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070111206
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  • 2
    Electronic Resource
    Electronic Resource
    Hydrolysis of wheat straw hemicellulose with trifluoroacetic acid. Fermentation of xylose with Pachysolen tannophilus (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 26 (1984), S. 1122-1125 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Treatment of wheat straw with 1N trifluoroacetic acid (TFA) for 7 h at reflux temperature yielded 23% xylose based upon initial straw weight. This corresponds to about an 80% xylose yield based on the xylan content of the hemicellulose. The cellulose component of wheat straw was largely unaffected, as evidenced by low glucose yields. Decomposition of xylose by prolonged refluxing (23 h) was minimal in 1N TFA compared to 1N HCl. Treatment of wheat straw with refluxing 1N TFA converts about 10% of the lignin initially present in straw into water-soluble lignin fragments. Fermentation of the xylose-rich wheat straw hydrolyzate to ethanol with Pachysolen tannophilus was comparable to the fermentation of reagent grade xylose, indicating that furfural and toxic lignin by-products were not produced by 1N TFA in sufficient amounts to impair cell growth and ethanol production. Cellulase treatment of the wheat straw residue after TFA hydrolysis resulted in a 70-75% conversion of the cellulose into glucose.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260260916
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  • 3
    Electronic Resource
    Electronic Resource
    Bioconversion of wheat straw cellulose/hemicellulose to ethanol by Saccharomyces uvarum and Pachysolen tannophilusThe mention of firm names or trade products does not imply that they are endorsed or recommended by the U.S. Department of Agriculture over other firms or similar products not mentioned (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 1105-1113 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The information presented in this publication represents current research findings on the production of glucose and xylose from straw and subsequent direct fermentation of both sugars to ethanol. Agricultural straw was subjected to thermal or alkali pulping prior to enzymatic saccharification. When wheat straw (WS) was treated at 170°C for 30-60 min at a water-to-solids ratio of 7:1, the yield of cellulosic pulp was 70-82%. A sodium hydroxide extration yielded a 60% cellulosic pulp and a hemicellulosic fraction available for fermentation to ethanol. The cellulosic pulps were subjected to cellulase hydrolysis at 55°C for production of sugars to support a 6-C fermentation. Hemicellulose was recovered from the liquor filtrates by acid/alcohol precipitation followed by acid hydrolysis to xylose for fermentation. Subsequent experiments have involved the fermentation of cellulosic and hemicelluosic hydrolysates to ethanol. Apparently these fermentations were inhibited by substances introduced by thermal and alkali treatment of the straws, because ethanol efficiencies of only 40-60% were achieved. Xylose from hydrolysis of wheat straw pentosans supported an ethanol fermentation by Pachysolen tannophilus strain NRRL 2460. This unusual yeast is capable of producing ethanol from both glucose and xylose. Ethanol yields were not maximal due to deleterious substances in the WS hydrolysates.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260240507
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  • 4
    Electronic Resource
    Electronic Resource
    Quantitative determination of 6-Oxo-PGF1α in biological fluids by gas chromatography mass spectrometry (1980)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 7 (1980), S. 544-548 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A selected ion monitoring method for the determination of 6-oxo-PGF1α, the stable end-product of prostacyclin, in biological fluids has been developed. In this method, biosynthetically prepared [2H6]-6-oxo-PGF1α is used as internal standard. The method involves extraction, thin-layer chromatography purification and derivatization into the methyl ester, methoxime, trimethylsilyl ether derivatives by carrying out the methoximation first. Quantitative gas chromatographic mass spectrometric analysis is performed in the electron impact mode by monitoring the [M - (TMSOH + CH3O.)]+. fragment ions. The use of this method in the measurement of 6-oxo-PGF1α in serous fluids and in incubation media of serous tissues is described.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200071119
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  • 5
    Electronic Resource
    Electronic Resource
    The detailed mechanism of the Dushman reaction explored by computer (1979)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 11 (1979), S. 693-703 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Since 1926 investigations of the Dushman reaction have relied mainly upon “constant-rate” measurements, usually by instrumental methods. Since about that time, the confusion surrounding this venerable reaction has been growing. In part, the confusion arises because the reaction involves reactive intermediate species that have not been studied directly - and may never be. Alternative detailed mechanisms have been assumed with little restraint. One of these, which is built around H2I2O3, has been explored by computer with promising results. The mechanism seems capable of reducing the confusion now attending the Dushman reaction and others related to it.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550110703
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  • 6
    Electronic Resource
    Electronic Resource
    Solubility of polymers in arsenic and antimony trichlorides (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 3 (1965), S. 81-82 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.110030201
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  • 7
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. XX [1] Die Dissoziation der Silanthiole in wäßriger Lösung (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 425 (1976), S. 91-96 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Silicon-Sulphur Compounds. XX. The Dissociation of Silanethiols in Aqueous SolutionThe dissociation of silanethiols (RO)3SiSH, (RO)3Si(SH)2, Ar3SiSH, PhnR3-nSiSH was examinated by means of conductometry in water-dioxane solution (1:4) and the dissociation constants in water were evaluated. The results were discussed on the basis of the Taft equation.
    Notes: Die Dissoziation der Silanthiole (RO)3SiSH, (RO)2Si(SH)2, Ar3SiSH, PhnR3-nSiSH wurde konduktometrisch in Wasser-Dioxan 1:4 verfolgt und die Dissoziationskonstanten in Wasser ausgewertet. Die Ergebnisse wurden auf Grund der Taftschen Gleichung diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764250111
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  • 8
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. XXIII. Die Hydrolysereaktion der Silanthiole (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 450 (1979), S. 178-182 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Silicon-Sulphur Compounds. XXIII. The Hydrolysis Reaction of SilanethiolsThe kinetics of the hydrolysis reaction of silanethiols (RO)3SiSH and R3SiSH in dioxane-water solutions were investigated and the rate constants and the activation parameters evaluated. The mechanism of the reaction is discussed. The relationship between the structure of silanethiols and their reactivity are evaluated.
    Notes: Die Kinetik der Hydrolysereaktion von Silanthiolen (RO)3SiSH und R3SiSH wurde in Dioxan-Wasser-Lösungen untersucht und die Geschwindigkeitskonstanten und Aktivierungsparameter dieser Reaktion bestimmt. Der Mechanismus wird diskutiert. Ferner wird ein Zusammenhang zwischen der Struktur der Silanthiole und ihrer Reaktivität ermittelt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794500121
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  • 9
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. XXIV. Schwingungsspektroskopische Untersuchungen der Acidität von Silanthiolen; quantitative Zusammenhänge zwischen der Struktur und den δ-n̈(SH)-, HNP- und pK-WertenProfessor Günther Schott zum 60. Geburtstage gewidmet. (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 488 (1982), S. 229-234 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Silicon-Sulphur Compounds. XXIV. Spectrophotometric Investigations of Acidity of Silanethiols and Quantitative Relationships between the Structure and δν(SH), HNP, and pK ValuesFor representatives of silanethiols the S—H valence frequency shifts have been determined. The relationship between δν(SH) and structure of thiol has been estimated. The correlations between δν(SH), HNP, and pK Values have been evaluated.
    Notes: Für Vertreter von Silanthiolen wurde die Verschiebung der S—H-Valenzschwingungsbande bestimmt. Der Zusammenhang zwischen δν(SH) des Thiols und seiner Struktur wurde ermittelt. Die Beziehungen zwischen δν(SH)-, HNP- und pK-Werten wurden festgestellt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824880127
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  • 10
    Electronic Resource
    Electronic Resource
    29Si-Chemische Verschiebungen in Alkoxy(amino)silanen (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 498 (1983), S. 218-224 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 29Si Chemical Shifts of Alkoxy(amino)silanesThe 29Si NMR spectra of a series of alkoxy(amino)silanes (RO)nMe3-nSiNHC6H4X (n = 1-3) have been measured and are discussed by means of relative paramagnetic screening constants σ*, calculated by a simplified quantum-chemical model.The Hammett plots of the silicon chemical shift show both positive and negative slopes with changes of the number of electronegative atoms (O, N) attached to silicon. The steric and electronic shift contributions of the alkoxy groups are given.
    Notes: 29Si-NMR-Spektren von Alkoxy(amino)silanen (RO)nMe3-nSiNHC6H4-X (n = 1-3) wurden aufgenommen und werden anhand der reduzierten paramagnetischen Abschirmungskonstanten σ*, berechnet auf der Basis eines vereinfachten quantenchemischen Modells, diskutiert.Die Hammettschen Zusammenhänge der chemischen Verschiebung δ29Si zeigen mit der Änderung der Anzahl von elektronegativen Atomen (O, N) am Silicium positive wie auch negative Neigungen. Die sterischen und elektronischen Verschiebungsanteile der Alkoxygruppen sind angegeben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19834980327
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