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  • Industrial Chemistry  (4)
  • Isochrysis galbana  (2)
  • Tetraselmis suecica  (2)
  • Wave propagation  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Application of a Direct Stiffness Method to Wave Propagation in Multiphase Poroelastic Media (1997)
    Springer
    Meccanica 32 (1997), S. 205-214 
    Details
    ISSN: 1572-9648
    Keywords: Wave propagation ; Poroelasticity ; Unsaturated media ; Transform methods ; Solid mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In this paper, it is demonstrated how a direct stiffness method for wavepropagation in multilayered saturated poroelastic media, based on integraltransform techniques, can be modified to account for a small amount of gasin the pores. Unsaturated media with small gas fractions can be treatedusing Smeulders‘ extension of Biot‘s poroelastic theory. The effect of thepresence of gas bubbles on the fluid bulk modulus and the dispersioncharacteristics of a water-saturated sand of Mol is demonstrated. Thedirect stiffness method is illustrated with a numerical example wheretransient wave propagation in a dry, saturated and unsaturated halfspaceis considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004214523182
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  • 2
    Electronic Resource
    Electronic Resource
    FFT-based spectral analysis methodology for one-dimensional wave propagation in poroelastic media (1992)
    Springer
    Transport in porous media 9 (1992), S. 85-97 
    Details
    ISSN: 1573-1634
    Keywords: Wave propagation ; poroelastic spectral element ; absorbing boundary condition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract The general one-dimensional equilibrium equations describing the dynamic behaviour of a porous medium form a system of coupled hyperbolic partial differential equations. A transition from the time to the frequency domain is made by spectral decomposition of the displacements. The equations simplify to a set of coupled ordinary differential equations. A solution can be obtained by solving a frequency-dependent eigenvalue problem. The characteristic equation clarifies the double wave-pattern and the attenuation of each wave. A spectrally formulated element uses the frequency-dependent eivenvectors as shape functions. The mass distribution is treated exactly without the need of subdividing a member into smaller elements and therefore wave propagation within an element is also treated exactly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01039628
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  • 3
    Electronic Resource
    Electronic Resource
    Vitamin analysis of five planktonic microalgae and one macroalga (1991)
    Springer
    Journal of applied phycology 3 (1991), S. 259-264 
    Details
    ISSN: 1573-5176
    Keywords: vitamin analysis ; HPLC ; algae ; Tetraselmis suecica ; Isochrysis galbana ; Pavlova lutheri ; Skeletonema costatum ; Chaetoceros calcitrans ; Sargassum muticum ; cosmetology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Vitamin analysis was carried out on five microalgae used in aquaculture:Tetraselmis suecica, Isochrysis galbana, Pavlova lutheri, Skeletonema costatum andChaetoceros calcitrans and one macroalga,Sargassum muticum, which is invasive on the Atlantic shores of France. Both liposoluble (provitamin A, E, K) and hydrosoluble (B1, B2, B6, B12, C, PP) vitamins were quantified. For most of them, greater amounts were obtained in the algal products than in the usual sources. On a dry weight basis,Tetraselmis suecica contained 4280 μg g−1 provitamin A and 6323 μg g−1 vitamin E,Pavlova lutheri 1162 μg g−1 vitamin B12 and 837 μg g−1 vitamin C,Isochrysis galbana 2690 μg g−1 vitamin PP and 183 μg g−1 vitamin B6, andSkeletonema costatum 710 μg g−1 vitamin B1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00003584
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  • 4
    Electronic Resource
    Electronic Resource
    Free amino acid analysis of five microalgae (1998)
    Springer
    Journal of applied phycology 10 (1998), S. 131-134 
    Details
    ISSN: 1573-5176
    Keywords: Free amino acids ; HPLC ; microalgae ; Tetraselmis suecica ; Isochrysis galbana ; Thalassiosira sp. ; Skeletonema costatum ; Chaetoceros calcitrans ; cosmetology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The HPLC separation of fluorescent o-phtaldialdehyde (OPA) derivatives has been applied to the assay of free amino acids from five microalgae commonly used in aquaculture: Tetraselmis suecica, Skeletonema costatum, Chaetoceros calcitrans, Thalassiosira sp. and Isochrysis galbana, as part an assessment of their potential use in cosmetic products. Thirteen free amino acids were analyzed using High Performance Liquid Chromatography. There were considerable differences between species. However, four amino acids were responsible for more than 60% total concentration in all species: ASP, GLU, ARG and TYR; the next most important (accounting for less than 30%) were: ALA, VAL, PHE and LYS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008003016458
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  • 5
    Electronic Resource
    Electronic Resource
    Apparatur für genaue Druck- und Temperaturregelung bei Rektifikationen und bei der Messung von Verdampfungsgleichgewichten (1953)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 25 (1953), S. 511-514 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Eine Apparatur wird beschrieben, die als Manostat eine Druckkonstanz 〈 0,02 Torr aufweist und bei veränderter Schaltung mit einem genügend empfindlichen Thermometer eine Temperaturkonstanz 〈 0,01 Grad bei der Messung isothermer Verdampfungsgleichgewichte ergibt.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330250820
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  • 6
    Electronic Resource
    Electronic Resource
    Gaschromatographie und extraktive DestillationVorgetragen auf der internen Arbeitssitzung des Fachausschusses Destillation, Rektifikation und Extraktion der VDI-Fachgruppe Verfahrenstechnik am 24. April 1956 in Bingen. (1956)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 28 (1956), S. 489-495 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Verteilungsgaschromatographie ist ebenso wie die extraktive Destillation als ein Verfahren der angewandten Mischphasenthermodynamik zu charakterisieren. Gute Trennungen können entweder durch leistungsfähige Kolonnen (Problem der Verfahrenstechnik) oder durch geeignete Wahl der stationären Phase bzw. der Zusatzkomponenten (Problem der angewandten Mischphasenthermodynamik) erzielt werden. Durch richtige Kombination beider Prinzipien wird praktisch jedes Trennproblem gelöst werden können. Im folgenden werden die Zusammenhänge zwischen der Verteilungsgaschromatographie und der extraktiven Destillation diskutiert und durch experimentelle Beispiele erläutert.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330280707
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  • 7
    Electronic Resource
    Electronic Resource
    Absorptionsversuche mit einem Blasenwascher (1965)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 37 (1965), S. 214-218 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In einem Blasenturm wurde die räumliche Stoffübergangszahl bei der Absorption von Kohlendioxyd in K2CO3/KHCO3-Lösung gemessen. Anders als bei konventionellen Apparaten erzeugte hier ein Mischejektor das Zweiphasengemisch und förderte es anschließend mit hoher Geschwindigkeit durch ein Reaktionsrohr. Die Meßergebnisse bestätigten, daß mit wachsender Flüssigkeitsgeschwindigkeit die räumliche Stoffübergangszahl ansteigt. Auch der Einfluß des Kohlendioxyd-Partialdruckes, der Gasbelastung, des KHCO3-Gehaltes und der Normalität der Lösung auf den Stoffübergang wurde untersucht.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330370307
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen an Standard-Testgemischen (1957)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 29 (1957), S. 397-402 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die bekannten Testgemische n-Heptan/Methylcyclohexan und n-Decan/trans-Decalin werden auf ihr ideales Verhalten hin untersucht. Beide Systeme verhalten sich in dem untersuchten Temperaturbereich pseudoideal gemäß der Auffassung von L. Sieg. - Zum Test von Kolonnen mit mehr als 100 theoretischen Böden wird das System m-Xylol/p-Xylol vorgeschlagen, dessen Dampfdrucke gemessen wurden. Ein Diagramm zur Bestimmung der theoretischen Bodenzahl mit m-Xylol/p-Xylol als Testgemisch bei 760 Torr wird angegeben.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330290606
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