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  • Springer  (463)
  • 1990-1994  (123)
  • 1985-1989  (153)
  • 1960-1964  (187)
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  • 1
    Electronic Resource
    Electronic Resource
    Ultrasonic decolorization of safranine O (1963)
    Springer
    Colloid & polymer science 187 (1963), S. 53-56 
    Details
    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 Ultraschallbestrahlung (1 MHz, 225 W/cm2) erlauben die Untersuchung der Entfärbung von wä\riger Safranin-O-Lösung. Die erhaltenen spektrometrischen Daten zeigen das Verschwinden der Farbe im Laufe der Zeit. Diaceton-Alkohol, n-Propyl-, n-Butyl- und äthylalkohol, Dioxan und äther verhindern die Entfärbung. Wasserstoffperoxid beschleunigt sie nicht. Die Farbstoffmoleküle werden offensichtlich durch Kavitation abgebaut.
    Notes: Summary Ultrasonic radiation from Mullard generator with barium titanate crystal as transducer having a frequency of 1 Mc/sec and power output 225 w/sq. cm. have been used to study the decolorization of aqueous solution of safranine O. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. Diacetone alcohol, n-propyl alcohol, n-butyl alcohol, ethyl alcohol, dioxan and ether inhibit the decolorization. Hydrogen peroxide does not help the decolorization. Cavitation is responsible for breaking the molecules of the dye.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01622718
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  • 2
    Electronic Resource
    Electronic Resource
    The influence of ultrasonic waves on manganese dioxide sol in the atmosphere of nitrogen (1963)
    Springer
    Colloid & polymer science 188 (1963), S. 136-138 
    Details
    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 Der Einfluß von Ultraschall (1 mHz, 225 W/cm2) auf negativ geladenes Mangandioxidsol wurde unter Stickstoff unter Ausschluß von Sauerstoff untersucht. Die Stabilität des Sols ist in gleicher Weise wie bei Gegenwart von Luft verändert, nur wird das Sol bei Ausschluß von Sauerstoff weniger instabil. Die spezifische Leitfähigkeit steigt mit steigender Expositionszeit, während die Wasserstoffionenkonzentration praktisch konstant bleibt.
    Notes: Summary The influence of ultrasonic waves at 1 MC/sec and 225 watts/cm2 power on the negatively charged manganese dioxide sol has been investigated in an atmosphere of nitrogen and thereby excluding oxygen. The stability of the sol on exposure to ultrasonic waves is affected in a similar way as in presence of air but the extent to which the sol gets unstable on exposure is less in the absence of oxygen than in its presence. The specific conductivity increases but hydrogen ion concentration remains practically constant as the time of exposure increases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499906
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  • 3
    Electronic Resource
    Electronic Resource
    Protein and amino acid composition ofFagopyrum (buckwheat) (1987)
    Springer
    Plant foods for human nutrition 36 (1987), S. 341-344 
    Details
    ISSN: 1573-9104
    Keywords: fagopyrum ; protein ; amino acids ; lysine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seven varieties of buckwheat, two Indian selections (F. esculentum, F. tetaricum) and five from Poland (Czernoplodna, Hruszowska, Jubilejna, Emka and Iskra) were cultivated under North Indian conditions and analysed for their protein and amino acid composition. The present studies revealed that European selections can also be successfully cultivated in India. Buckwheat is a good source of lysine, and some other essential amino acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01892355
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  • 4
    Electronic Resource
    Electronic Resource
    Decolourisation of brilliant green under ultrasonic radiations (1961)
    Springer
    Colloid & polymer science 175 (1961), S. 50-53 
    Details
    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 Ultraschallbestrahlung von einemMullard-Generator mit Bariumtitanat-Kristallen als Schallgeber (Frequenz 1 MHz; 225 W/cm2 als Strahlungsleistung) wurde angewandt, um die Entfärbung von wäßrigen Lösungen aus Brillantgrün zu untersuchen. Die erhaltenen Adsorptionskurven aus spektrometrischen Daten zeigen das Verschwinden des Farbstoffs mit wechselnder Zeit der Bestrahlung. Die Reaktion ist unimolekular, und die mittleren Geschwindigkeitskonstanten sind 0,739, 0,452 und 0,365 für die Konzentrationen 0,0064, 0,0096 und 0,0128 g/l. Die Anwesenheit geringer Beträge von Äthylalkohol unterbindet die Entfärbung. Gravitation und Oxydation, verursacht durch die Gegenwart von Spuren aktivierten Sauerstoffs aus der gelösten Luft, scheinen die Ursache für die Entfärbung zu sein.
    Notes: Summary Ultrasonic radiations from aMullard generator with barium titanate crystal as transducer having a frequency 1 MC/sec. and power output 225 W/sq. cm. have been used to study the decolourisation of aqueous solutions of brilliant green dye. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. The reaction has been found to he unimolecular and average velocity constants are 0.739, 0.452 and 0.365 for concentrations 0.0064, 0.0096 and 0.0128 g./l. respectively. The presence of small amount of ethyl alcohol inhibits the fading. Cavitation and oxidation due to the presence of some activated oxygen from the dissolved air seem to be the cause of fading.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520113
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  • 5
    Electronic Resource
    Electronic Resource
    Ultrasonic decolorization of bromocresol green (1963)
    Springer
    Colloid & polymer science 188 (1963), S. 59-61 
    Details
    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 Ultraschallbestrahlung mit einemMullard-Generator und Bariumtitanatkristall als Übertrager (1 MHz) diente zur Beobachtung der Entfärbung wäßriger Bromkresolgrünlösungen. Die mikroskopischen Adsorptionskurven zeigen das Verschwinden der Farbe mit der Zeit an. Gegenwart geringer Beträge von Äthylalkohol, n-Propylalkohol, n-Butylalkohol, Diaceton, Alkohol und Aceton stoppen die Verfärbung. Ursache scheint Kavitation zu sein.
    Notes: Summary Ultrasonic radiations from aMullard generator with barium titanate crystal as transducer having a frequency 1 Mc/sec, have been used to study the decolorization of an aqueous solution of bromocresol green. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. The presence of small amount of ethyl alcohol, n-propyl alcohol, n-butyl alcohol, diacetone alcohol and acetone separately inhibit the fading. Cavitation seems to be the cause of decolorization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499606
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  • 6
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    Ultrasonic decolorization of safranine O (1963)
    Springer
    Details
    Publication Date: 1963-01-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 7
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    Unknown
    Decolourisation of brilliant green under ultrasonic radiations (1961)
    Springer
    Details
    Publication Date: 1961-03-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 8
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    Unknown
    The influence of ultrasonic waves on manganese dioxide sol in the atmosphere of nitrogen (1963)
    Springer
    Details
    Publication Date: 1963-04-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 9
    Electronic Resource
    Electronic Resource
    History of yield improvements in the production of asperlicin byAspergillus alliaceus (1989)
    Springer
    Journal of industrial microbiology and biotechnology 4 (1989), S. 97-104 
    Details
    ISSN: 1476-5535
    Keywords: Fermentation development ; Cholecystokinin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The natural product asperlicin is the first nonpeptide antagonist of cholecystokinin isolated from a microbial source. At discovery, production of asperlicin by the original soil isolate ofAspergillus alliaceus was between 15 and 30 mg/l. Selection of natural variants ofA. alliaceus, use of Plackett & Burman and Simplex experimental designs; formulation of synthetic media; amino acid supplementation of production media; analysis of complex nitrogen sources for their amino acid content; evaluation of promising media in fermentors; substitution of glycerol for glucose as a carbon source and rational mutant selection all contributed to titer increases to 〉900 mg/l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01569793
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  • 10
    Electronic Resource
    Electronic Resource
    The convex hull of two core capacitated network design problems (1993)
    Springer
    Mathematical programming 60 (1993), S. 233-250 
    Details
    ISSN: 1436-4646
    Keywords: Convex hull ; facets ; network design ; capacitated facilities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract The network loading problem (NLP) is a specialized capacitated network design problem in which prescribed point-to-point demand between various pairs of nodes of a network must be met by installing (loading) a capacitated facility. We can load any number of units of the facility on each of the arcs at a specified arc dependent cost. The problem is to determine the number of facilities to be loaded on the arcs that will satisfy the given demand at minimum cost. This paper studies two core subproblems of the NLP. The first problem, motivated by a Lagrangian relaxation approach for solving the problem, considers a multiple commodity, single arc capacitated network design problem. The second problem is a three node network; this specialized network arises in larger networks if we aggregate nodes. In both cases, we develop families of facets and completely characterize the convex hull of feasible solutions to the integer programming formulation of the problems. These results in turn strengthen the formulation of the NLP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01580612
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