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  • 1
    Publication Date: 1981-02-01
    Print ISSN: 0196-4313
    Electronic ISSN: 1541-4833
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 20 (1981), S. 101-102 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 20 (1981), S. 471-476 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On a effectué des mesures TG sur du cinabre en conditions a) isothermes et b) dynamiques, sous courant constant d'azote. On a analysé les résultats afin d'établir la cinétique de la décomposition et de calculer les énergies d'activation. Dans le cas de la décomposition isotherme, on a conclu que la vitesse de la diffusion des produits gazeux était le facteur contrÔlant la réaction, tandis que lors de la décomposition dynamique la nucléation et la croissance des particules de Pb3O4 jouaient un rÔle important.
    Abstract: Zusammenfassung TG-Messungen wurden an Zinoberrot unter a) isothermen und b) dynamischen Bedingungen, in einem konstanten Stickstoffstrom durchgeführt. Die Ergebnisse wurden analysiert um die Zersetzungskinetik zu ermitteln und die Aktivierungsenergien zu berechnen. Im Falle der isothermen Zersetzung wurde gefolgert, da\ die Diffusionsgeschwindigkeit der gasförmigen Produkte der steuernde Faktor ist, wÄhrend bei der dynamischen Zersetzung die Keimbildung und das Wachstum innerhalb der Pb3O4-Teilchen von Bedeutung ist.
    Notes: Abstract TG measurements have been performed on red lead under (a) isothermal (b) dynamic conditions, under a constant flow of nitrogen. The results have been analyzed to establish the decomposition kinetics and calculate the activation energies. In the case of isothermal decomposition, it is concluded that rate of diffusion of gaseous products is the controlling factor, while in dynamic decomposition nucleation and growth within the Pb3O4 particles is important.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 17 (1975), S. 845-858 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Amongst the commercial type of homogenizers the Manton-GaulinAPV homogenizer (APV Company Ltd., Crawley, Surrey, England) which is generally being used for other purposes than cell disintegration processes, has recently been proved to be effective for the breakage of yeast cells. To understand fully the disintegration process occurring in such machines it becomes necessary to describe their functions through mathematical expressionsbased on a realistic hydrodynamic model.A mathematical expression describing the protein release at an applied pressure has been derived from an energy balance in the homogenizer combined with the size distribution function of yeast cell population. This expression has been confirmed experimentally under conditions where it shows that turbulence is the controlling factor in the system. Furthermore it indicates the area where more investigations are needed to improve the efficiency of the process of disintegration.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 19 (1977), S. 649-660 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: On the basis of elastic waves released by imploding cavitation bubbles, a mechanism for biological cell disintegration in high intensity ultrasounds has been proposed. Comparison of this mechanism with the published results on yeast cells shows many points of agreement suggesting that yeast cell disintegration in ultrasonic cavitation occurs by shear stresses developed by viscous dissipative eddies arising from shock waves.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 20 (1978), S. 1287-1289 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 22 (1978), S. 1735-1743 
    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: A mechanism for the degradation of polymer molecules in ultrasonic cavitation has been proposed which takes into account the energy released by imploding cavitation bubbles in the form of hydrodynamic waves. Relationships for degradation rate constant and limiting chain length linking with the cavitation energy have been derived and are compared with published results on 1% solutions of polystyrene in benzene. These results show satisfactory agreements with the theory presented when the cavitation wave energy is taken proportional to the energy supplied to the ultrasound generating transducer.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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