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  • 1
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 195 (1992), S. 320-325 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Am Beispiel der Milchproteine wird die Methode zur Bestimmung der maximalen Emulgierkapazität optimiert. Die Methode beruht darauf, daß am Inversionspunkt einer Emulsion der elektrische Widerstand sprunghaft ansteigt. Experimentell überprüft wurden die Parameter Proteinkonzentration, pH-Wert, Öl-Dosierungsrate, Ultra-Turrax-Drehzahl und Versuchsdauer. Ferner wurden Forderungen an die Ermittlungdes Leerwertes begründet. Durch Festlegen der stofflich und methodisch bedingten Einflußgrößen gelingt es, den Variationskoeffizienten auf Werte um 2,0% zu minimieren. Die vorgestellte Methode ist mit gutem Erfolg auf alle löslichen Proteine übertragbar und erfüllt die Anforderungen einer Standardisierung.
    Notes: Summary A method for the examination of the maximum value of emulsifying capacity was optimized using milk proteins. This method is based on a sudden increase in the electrical resistance at the inversion point of the emulsion. The following parameters were tested: protein concentration, pH value, rate of oil dosage, speed of the Ultra-Turrax, time needed for one experiment, and the requirements for preparing the blank. By fixing these parameters it is possible to minimize the coefficient of variation of about 2.0%. This method is successfully applicable for all soluble proteins and meets all the requirements for standardisation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 199 (1994), S. 289-293 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Abstract Solubility of Simplesse 100, the only wheybased fat substitute, was found to be good, considering the fact that technology for preparation of Simplesse 100 is a sequence of thermal steps. To characterize this phenomen, gel chromatography on Sephadex G-100, Sephacryl S-1000 and SDS-PAGE were used, supported by high-speed separation, UV studies and analytical procedures. Results show that the unusual solubility characteristic of microparticulated whey protein is related to two molecular effects: (1) optimal defolding of protein molecules and (2) stabilization of the defolded status by carbohydrate. Both effects were considered to favour non-covalent bonds, which contribute to the outstanding physico-functional and nutritive properties of microparticles.
    Notes: Zusammenfassung Simplesse 100, Fettsubstitut auf Molkenbasis, zeigt ein gutes Lösungsverhalten. Da die Entstehung von Mikropartikeln mit thermischen Verfahrensschritten verbunden ist, ist ein solches Verhalten ungewöhnlich. Zur Klärung dieses Phänomens wurden gelchromatographische Trennungen an Sephadex G-100 bzw. an Sephacryl S-1000 sowie die SDS-PAGE herangezogen, unterstützt durch UV-Studien, analytische Techniken und Zentrifugation bei 23.000g. Die Ergebnisse lassen den Schluß zu, daß das Lösungsverhalten mikropartikulierten Molkenproteins im wesentlichen von zwei Effekten bestimmt wird, (1) der optimalen Entfaltung der Proteinmoleküle und (2) der Stabilisierung der entfalteten Proteinmoleküle durch Kohlenhydrate. Beide Effekte favorisieren nicht-kovalente Bindungsmechanismen im mikropartikulierten Protein und sind verantwortlich für physiko-funktionelle und nutritive Eigenschaften.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Catalytic hydrogenation of the title compound 1 yields 92-95% of ethyl methyl malonate (2), 3-5% of n-propyl malonate (3), 2-3% of dimethyl 2-methyl-1,1-cyclopropanedicarboxylate (4), and no 1,1-cyclobutanedicarboxylate 5, the formation of which, however, can be induced with a poisoned catalyst.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 423-426 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Enantioselective Adsorption of Chiral Azo Dyestuffs on Silk and Wool as well as Starch and CelluloseThe racemic azo compounds 1 or 2 from diazotised m-amino mandelic acid and β-naphthol could not even slightly be resolved by adsorption on wool as it has been reported. On powdered silk and potato starch 2 was resolved partly by chromatography. All attempts with the amide 3 from 1-phenylethylamine and p-azobenzenecarboxylic acid have not been successful so far.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1986 (1986), S. 1956-1967 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chromatographic Resolution of Enantiomers with Natural PolymersCheap, chiral, natural polymers have been tested as stationary phases for the chromatographic resolution of the enantiomers of several very different racemates. Silk, wool, and cellulose ar not suitable. Potato starch can be used well in special cases. Hesse's and Hagel's cellulose triacetate finds widest application, as shown by several new examples. This property results from a genuine chiral tertiary structure not to be destroyed during preparation.
    Notes: Mit einigen chemisch sehr verschiedenen Verbindungen werden billige, chirale, natürliche Polymere als stationäre Phasen für die chromatographische Enantiomerentrennung geprüft. Seide, Wolle und Cellulose eignen sich nicht. Kartoffelstärke hat sich in speziellen Fällen bewährt. Das Cellulosetriacetat nach Hesse und Hagel findet die breiteste Anwendung, wie an einigen neuen Beispielen gezeigt wird. Diese Eigenschaft ist an eine chiral gewachsene Tertiärstruktur gebunden, die bei der Herstellung erhalten bleiben muß.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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