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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 4 (1965), S. 49-55 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 228 (1968), S. 64-65 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurde eine Methode zur Bestimmung der Anzahl von Latexteilchen in der Volumeneinheit ausgearbeitet. Die Meßgenauigkeit beträgt ±10%. Vorausgesetzt, daß jedes Teilchen einzeln im Mikroskop zu erkennen ist, haben weder Unterschiede in der Teilchengröße, in der Form noch in der Größenverteilung einen Einfluß auf die Ergebnisse. Durch Dialyse sollte die im Latex erhaltene Seife entfernt werden, wobei das Koagulieren der Latex verhindert werden muß.
    Notes: Summary A method has been developed for measuring the number of particles per unit volume of latex by direct counting, with an error of about ±10%. The values obtained forN are unaffected by changes in particle size or shape in the microscope, or by size distribution of the particles, provided all particles are individually identifiable in the microscope. Soap present in the latex must be removed by dialysis though coagulation of the latex must be avoided.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 45 (1998), S. 97-104 
    ISSN: 0006-3525
    Keywords: selective separation of proteins from mixtures ; polysaccharides ; phase behavior ; phase separation ; depletion flocculation ; ternary systems ; quatenary systems ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The phase behavior of ternary (protein + dextran + solvent) and quaternary (protein 1 + protein 2 + dextran + solvent) aqueous solutions have been monitored at various ionic strengths and pHs by turbidity measurements. For the ternary systems, phase separation was favored when the solvent conditions promoted protein self-association. Bovine serum albumin (BSA) and γ-globulin were believed to self-associate in the presence of dextran at their respective isoelectric points through the electrostatic interactions between positive and negative charged patches at their surface. The fact that phase separation for BSA became less evident on increasing the ionic strength supported this concept. In the case of lysozyme alone, self-association was promoted by the addition of electrolyte as was phase separation in the lysozyme + dextran ternary system. For this biopolymer self-association is presumably as a consequence of van der Waals and/or hydrophobic forces. The influence of dextran has been discussed in terms of polymer depletion theory where an additional attractive force is created due to the exclusion of the dextran molecules from the immediate vicinity of the protein surface. For the quaternary systems, by subtle choice of solvent conditions, BSA and globulin could be exclusively partitioned into separate liquid layers through a segregative mechanism, while BSA and lysozyme could be separated into a single highly concentrated layer through an associative mechanism. © 1998 John Wiley & Sons, Inc. Biopoly 45: 97-104, 1998
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 7 (1969), S. 417-427 
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The variation of the number of particles/unit volume of latex (N) with conversion was determined during the emulsion polymerization of styrene. The results showed that, contrary to what is required by the Smith-Ewart theory, N increased during the constant rate period. This conclusion was supported by the variation of the particle size distribution with conversion. Further evidence that latex particles could form in the absence of micelles was given by using systems in which the soaps were below the CMC. The chain length of the soaps used had a marked effect on the rate of polymerization. This effect was shown not to be due to the variation of the CMC with chain length, but possibly to the stronger adsorption of the longer chain length soaps at the polymer-water interface.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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