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  • Articles: DFG German National Licenses  (15)
  • Organic Chemistry  (7)
  • Chemical Engineering  (5)
  • Analytical Chemistry and Spectroscopy  (3)
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  • Articles: DFG German National Licenses  (15)
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    A 2-d numerical study of intermeshing self-wiping screws in biopolymer extrusion (1991)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 31 (1991), S. 1157-1163 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: A knowledge of flow behavior is important in the study of laminar flow in twin-screw extrusion processes to predict the velocity distribution and to understand the mixing process. The flow of a power law fluid in self-wiping twin-screw extruders is examined using a two-dimensional finite element analysis of a mid-channel section of intermeshing screws. Theory is compared with experiment using food biopolymer and plastic materials. Comparisons showing overprediction of throughputs, but similarities in behavior, suggest that this model could provide an upper limit for melt conveying. For most of the throughput range examined, pumping of intermeshing self-wiping screws appears to be almost independent of the power law flow index of the melt extruded, but the value of the flow index determines the degree of influence intermeshing has on the overall pressure gradient generated in the extruder.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760311513
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Family plots for evaluating physical properties of organosilicon compounds (1994)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 40 (1994), S. 373-377 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690400217
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stable isotope ratio analysis of leucine and ketoisocaproic acid in blood plasma by gas chromatography/mass spectrometry. Use of tertiary butyldimethylsilyl derivatives (1988)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 2 (1988), S. 14-16 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290020105
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Pressure losses in the packing stage of injection molding (1986)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 26 (1986), S. 1282-1289 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: The pressure loss between the mold and the nozzle in the injection molding of bar and box moldings has been monitored. The pressure drop observed during filling of the mold is reduced during the packing stage but remains finite. This has been attributed in the literature to solidification of polymer across the cavity transducer and to melt relaxation phenomena. Experiments have been carried out with hot molds to prolong the packing stage at the expense of the ‘cooling’ stage. Under these circumstances the pressure drop is reduced but not eliminated. The observed pressure drop may be related to the viscosity of the melt and its dependence on pressure and temperature although strain-induced crystallization and the pressure dependence of the melting point can confer effects similar to the cooling stage.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760261808
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Pumping characteristics of self-wiping twin-screw extruders - A theoretical and experimental study on biopolymer extrusion (1989)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 29 (1989), S. 433-440 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: The flow of Newtonian and non-Newtonian fluids which obeys a power law relationship between shear stress and shear rate has been modeled in the melt conveying section of a self-wiping co-rotating twin-screw extruder using a finite element analysis of an unwound channel section. Predictions of throughput against pressure gradient are compared with experimentally obtained results for maize grits which is represented as a power law material. Rheological data applicable to extrusion simulation were obtained from capillary rheometry. Comparisons are reasonable with predicted characteristic showing similar behavior.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760290702
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Über die Herstellung und physiologischen Eigenschaften einiger Acetylenverbindungen und verwandter Stoffe. 2. Mitteilung. Über die Umlagerung von 3,4-Di-p-anisyl-3-ol-hexin-(1) (1953)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 36 (1953), S. 1949-1955 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Attempts to remove water from 3,4-di-p-anisyl-1-hexyn-3-ol in acid medium resulted in rearrangement according to Meyer-Schuster principally and to Rupe to a minor extent. None of the derivatives of these rearrangement products reached the oestrogenicity of stilboestrol. The dehydration of 3,4-di-p-anisyl-3-hexen-2-ol does not lead to the expected diene but to the corresponding methylether of the known 1-ethyl-2-p-hydroxyphenyl-3-methyl-5-hydroxyindene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19530360734
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Über einige β-substituierte Fettsäureamide mit lokalanästhetischer Wirkung. 5. Mitteilung (1959)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 42 (1959), S. 1771-1779 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A further series of butyric acid amides has been synthesised in which the diethylamino, pyrrolidino and piperidino groups of previously reported syntheses have been substituted by morpholino groups. The influence of the various groups in the present and in previously reported derivatives on the pharmacology of the series is reported and summarised. The conditions necessary for maximum local anaesthesia and barbiturate potentiation are discussed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19590420604
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Über einige β-substituierte Fettsäureamide mit lokalanästhetischer Wirkung. 4. Mitteilung (1959)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 42 (1959), S. 1764-1771 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation and properties of some new β-alkylamino-butyric anilides have been described and a summary report on some of their pharmacological properties is given. Two derivatives (the p-(carbo-n-butoxy)-anilides of β-diethylamino- and of β-(1-piperidino)- butyric acid = XVI and XVIII) show promise as very active local anaesthetics with low toxicities. One derivative (β-N-pyrrolidino-n-butyric acid anilide = XXVII) shows strong potentiation of the sedative properties of barbiturates.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19590420603
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Influence des substituants sur la vitesse de racémisation des cétones à carbone dissymétrique en alpha (1960)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 43 (1960), S. 1915-1927 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rates of racemisation, under constant conditions of pH and temperature, of two series of ketones with an asymmetric C-atom in α have been determined. As would be expected, substituents in the α position to the keto group influence the rate of racemisation, and it has been found possible to assess the relative electron donating or electron attracting effect of aliphatic, aliphatic-aromatic or aromatic substituents by measuring their influence on the rate of racemisation of a ketone containing the substituent considered.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19600430705
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Über einige β-Dialkylaminobuttersäureamide mit anästhetischer Wirkung (1953)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 36 (1953), S. 1698-1705 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of some β-alkylaminobutyric-acid-amides from the corresponding crotonic acid amides and dimethyl or diethylamine under pressure at 100-150° is described. Two diethylamino acetic acid amides were prepared by reacting N-benzyl-chloracetamide or N-(pethoxybenzyl)-chloracetamide with diethylamine. All these β-dialkyl-aminobutyric and dialkylaminoacetic acid amides show local anaesthetic activity. Two of them (β-diethylaminobutyric acid anilide and β-diethylamino-butyric acid-p-phenetidide) show promise as long acting anaesthetics of low toxicity for nerve block anaesthesia, and are under clinical investigation.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19530360703
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