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  • 1
    Electronic Resource
    Electronic Resource
    Hydraulic deliquoring of compressible filter cakes. Part 1: Reverse flow in filter presses (1983)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 29 (1983), S. 297-305 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Removal of liquid from filter cakes can be accomplished by mechanical or hydraulic methods after cake formation is complete. This paper deals with the latter procedure. The local porosity in porous beds (Tiller and Cooper, 1962) is a function of hydraulic pressure distribution and cake compressibility. Calculation of average porosity requires an integration of local values as determined by liquid flow patterns. As most compressions of filter cakes are irreversible, the local porosity is a function of the maximum effective pressure (frictional pressure loss) reached during cyclical operations. Reversal of flow through a cake develops radically changed pressure distributions which can be utilized to reduce local porosities. Analytical expressions are presented for reduction of average porosity brought about by reversing flow of liquid in plate-and-frame and recessed plate filter presses.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690290218
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  • 2
    Electronic Resource
    Electronic Resource
    Revision of kynch sedimentation theory (1981)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 27 (1981), S. 823-829 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Much of the theory of gravity sedimentation has been based on the work of Coe and Clevenger (1916) and Kynch (1952). They provided methods for obtaining rates of sedimentation in batch, static tests which are presently used for design of continuous thickeners. Kynch assumed that a first order partial differential equation controlled the entire sedimentation process. His equation was based on: (1) continuity balance; and (2) sedimentation velocity being a unique function of solid particulate concentration. A general solution was presented in the form of volume fraction of solids φs = f(x - vt). During the constant rate fall of the upper interface, the boundary condition of uniform initial concentration combines with the Kynch equations to adequately describe the sedimentation phenomena. Kynch ignored the sediment rising from the bottom of the settling chamber, and assumed that the characteristics y = x - vt originated at the origin of coordinates (height, time) during the first falling rate period. The characteristics actually originate at the surface of the rising sediment where the upward liquid velocity affects the rate of fall of the particulates. New equations have been derived based upon the assumption that the characteristics emanate from the rising sediment.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690270517
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  • 3
    Electronic Resource
    Electronic Resource
    Über die Synthese neuer Schwefeltriimide (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2183-2188 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of New Sulfur TriimidesTri-tert-butylsulfur triimide (1b) reacts with isocyanates R—NCO (R = perfluoroalkyl, sulfonyl, pentafluorosulfanyl, FSO2N=C(CF3)-) to give the corresponding di-tert-sulfur triimides (tBuN)2S(NR) (3a-d, 4a, b, 5, 6) in high yields. By the same method the bis(trimethylsilyl) derivative (Me3SiN)2S(N—CF(CF3)2) (7) is prepared.
    Notes: Tri-tert-butylschwefeltriimid (1b) reagiert mit Isocyanaten R—NCO (R = Perfluoralkyl-, Sulfonyl-, Pentafluorsulfanyl-, FSO2N=C(CF3)-) in hohen Ausbeuten zu den entsprechenden Di-tert-butylschwefeltriimiden (tBuN)2S(NR) (3a-d, 4a, b, 5, 6) und tBuNCO. Auf gleichem Wege konnte auch das Bis(trimethylsilyl)-Derivat (Me3SiN)2S(N—CF(CF3)2) (7) dargestellt werden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130613
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  • 4
    Electronic Resource
    Electronic Resource
    λ6-Thiadiazetidinone (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2434-2440 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: λ6-ThiadiazetidinonesFrom sulfur triimides (tBuN)2S(NRf) (5) and excess RfNCO (2) λ6-thiadiazetidinones 9 are obtained. Reaction mechanisms for the formation of 9 and the properties of this class of compounds are discussed.
    Notes: Aus den Schwefeltriimiden (tBuN)2S(NRf) (5) und überschüssigem RfNCO (2) entstehen die λ6-Thiadiazetidinone 9. Reaktionsmechanismen für die Bildung von 9 werden vorgeschlagen und die Eigenschaften dieser Verbindungsklasse diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130712
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  • 5
    Electronic Resource
    Electronic Resource
    Bausteine von Oligosacchariden, LIII Synthese von 3-Desoxy-D-manno-2-octulosonsäure-(KDO-)-haltigen Trisacchariden (1984)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 1288-1297 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Building Units of Oligosaccharides, LIII. - Synthesis of Trisaccharides Containing 3-Deoxy-D-manno-2-octulosonic Acid (KDO)The disaccharide 9 consisting of two glucosamine units reacts with the pyranosyl bromide of 3-deoxy-D-manno-2-octulosonic acid (KDO) 11 to give the KDO-containing trisaccharides 12 and 14 of which the α-glycosidically linked isomer 12 is the most preponderant product. In a series of deblocking steps the free trisaccharide α-KDO-(2→3)-β-D-GlcNAc-(1→6)-D-GlcNAc 18 could be obtained from 12. The assignment to the α-glycosidic linkage of the KDO unit in 12 has been established by converting 19 into the lactone 20.
    Notes: Durch Umsetzung des aus zwei Glucosamin-Einheiten bestehenden Disaccharides 9 mit dem Pyranosylbromid der 3-Desoxy-D-manno-2-octulosonsäure (KDO) 11 sind die KDO-haltigen Trisaccharide 12 und 14 zu erhalten, von denen das α-glycosidisch verknüpfte Produkt 12 sehr stark überwiegt. Durch eine Entblockierungssequenz ist aus 12 das freie Trisaccharid α-KDO-(2→3)-β-D-GlcNAc-(1→6)-D-GlcNAc 18 zu gewinne. Die Zuordnung zur α-glycosidischen Verknüpfung des KDO-Teiles in 12 erfolgte durch Überführung von 19 in das Lacton 20.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198419840704
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  • 6
    Electronic Resource
    Electronic Resource
    Studies of silver staining of human parotid saliva protein polyacrylamide gel electrophoretograms (1983)
    Weinheim : Wiley-Blackwell
    Electrophoresis 4 (1983), S. 265-269 
    Details
    ISSN: 0173-0835
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: The silver staining procedure of Oakley et al. [3] has been applied to parotid saliva proteins and certain protein standards fractionated by isoelectric focusing and electrophoresis in denaturing and non-denaturing polyacrylamide gels. This staining method was up to 100-fold more sensitive than Coomassie Blue staining for sodium dodecyl sulphate-containing gels and for focusing gels, after prefixation. In non-denaturing gels, however, the relative sensitivity (i.e. silver vs. Coomassie) of different bands varies widely but this can be overcome by silver staining of gels after Coomassie Blue staining.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150040403
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  • 7
    Electronic Resource
    Electronic Resource
    Aromatic polymides. VII. Synthesis of sulfonated poly(para-phenyleneterephthalamide): Polymerization of 1,4-bis(trichloromethyl) benzene with para-phenylenediamine sulfate in SO3 (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 1787-1797 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: para-Phenylenediamine sulfate polymerized with 1,4-bis(trichloromethyl)benzene in SO3 at 〉 20% polymer concentration to form highly anisotropic (liquid crystalline) sulfonated poly(para-phenyleneterephthalamide) (S-PPT) solutions with inherent viscosities as high as 1.2. Analogous to the polymerization of para-phenylenediamine sulfate with terephthalic acid in SO3 reported previously, sulfonation of the aromatic diamine ring of S-PPT was not competitive with the polymerization reaction, but it was a major side reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180612
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  • 8
    Electronic Resource
    Electronic Resource
    Letters to the editor (1982)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 17 (1982), S. 593-595 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    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/oms.1210171113
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  • 9
    Electronic Resource
    Electronic Resource
    Mass spectrometry of aryl substituted di- and trisiloxanes (1980)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1980), S. 304-311 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of arylpentamethyldisiloxanes, sym-diaryltetramethyldisiloxanes and 1,5-diaryl-1,1,3,3,5,5-hexamethyltrisiloxanes were examined. Isotopic labeling and peak matching were used to substantiate the proposed fragmentation mechanisms. Siliconium ions dominate the spectra. Loss of neutral fragments from the [M-15]+ ions is important. Phenylpentamethyldisiloxane, sym-tetramethyldiphenyldisiloxane and 1,1,3,3,5,5-hexamethyl-1,5-diphenyltrisiloxane are representative examples of the three classes of compounds discussed. The [M-15]+ ion of phenylpentamethyldisiloxane loses methane, dimethylsilanone [(CH3)2Si=O] and phenylmethylsilanone [PhCH3Si=O] to yield daughter siliconium ions. The [M-15]+ ion of sym-tetramethyldiphenyldisiloxane loses benzene, methane, dimethylsilanone and phenylmethylsilanone to yield daughter siliconium ions. The [M-15]+ ion of 1,1,3,3,5,5-hexamethyl-1,5-diphenyltrisiloxane loses benzene, tetramethylcyclodisiloxane and phenyltrimethylcyclodisiloxane to yield daughter siliconium ions. Finally, doubly charged ions are important in the mass spectra of the three series of aryl substituted di- and trisiloxanes discussed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210150608
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  • 10
    Electronic Resource
    Electronic Resource
    Physikalische Methoden in der Chemie: Raman-Spektroskopie (1980)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 14 (1980), S. 158-167 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19800140504
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