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  • 1
    Electronic Resource
    Electronic Resource
    Effect of aloe lectin on deoxyribonucleic acid synthesis in baby hamster kidney cells (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 669-671 
    Details
    ISSN: 1420-9071
    Keywords: Aloe arborescent varnatalensis ; glycoprotein, aloe lectin ; deoxyribonucleic acid synthesis ; baby hamster kidney cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A homogeneous glycoprotein (mol.wt 40,000) containing 34% carbohydrate was isolated fromAloe arborescens var.natalensis. At a concentration of 5 μg/ml, this glycoprotein was shown to stimulate deoxyribonucleic acid (DNA) synthesis in baby hamster kidney (BHK) cells and to have the properties of a lectin which reacts with sheep blood cells. The chemical and physical properties of the glycoprotein (aloe lectin) are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02007712
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  • 2
    Electronic Resource
    Electronic Resource
    Thiamine-binding activity ofSaccharomyces cerevisiae plasma membrane (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 607-608 
    Details
    ISSN: 1420-9071
    Keywords: Thiamine ; thiamine-binding ; yeast plasma membrane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The specific binding activity to [14C]thiamine was found to be located in the plasma membrane ofSaccharomyces cerevisiae. The activity was inhibited by several thiamine analogs and it was hardly detectable in the plasma membrane from a thiamine transport mutant ofSaccharomyces cerevisiae. Some properties of the thiamine-binding activity of yeast plasma membrane are discussed in connection with those of the thiamine transport system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01955555
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  • 3
    Electronic Resource
    Electronic Resource
    Choline accumulation in isolated rat hepatocytes (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 889-892 
    Details
    ISSN: 1420-9071
    Keywords: Choline ; choline accumulation ; Na+-and energy-dependent process ; choline analogs ; quaternary ammonium compounds ; rat hepatocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The accumulation of non-metabolized choline in isolated rat hepatocytes is concentrative in Na+ medium, whereas the accumulation does not exceed unity in a Li+ medium. Ouabain and 2,4-dinitrophenol inhibited the choline uptake. These results indicate that choline is taken up by rat hepatocytes via a Na+-and energy-dependent process, and choline oxidase is not directly connected with the choline transport system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941191
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  • 4
    Electronic Resource
    Electronic Resource
    The NF-κB binding site is essential for transcriptional activation of the IL-15 gene (1998)
    Springer
    Immunogenetics 48 (1998), S. 1-7 
    Details
    ISSN: 1432-1211
    Keywords: Key words Interleukin-15 ; Gene transcription ; Macrophage ; NF-κB ; LPS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  We cloned the 5’ upstream region of IL-15 genomic DNA and examined promoter activity in macrophages stimulated with lipopolysaccharide(LPS). The 1.2 kilobase (kb) fragment of the 5’ upstream region contained binding elements for LPS-inducible transcription factors such as NFIL-6 or NF-κB. Determined by luciferase assay following transient transfection in the J774A.1 macrophage cell line, the 1.2 kb of the 5’ upstream region exhibited high promoter activity in response to LPS, while promoter activity was significantly reduced by the 5’ deletion of 313 base pairs containing the NF-κB binding motif. Nuclear protein prepared from LPS-stimulated macrophages formed a complex with the NF-κB binding sequence of the IL-15 promoter. Taken together, the binding of nuclear protein to the NF-κB binding site is required for transcriptional activation of the IL-15 gene in LPS-stimulated macrophages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002510050393
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  • 5
    Electronic Resource
    Electronic Resource
    E b z of NZW mice is identical with E b u of B10.PL mice (1991)
    Springer
    Immunogenetics 33 (1991), S. 413-414 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216704
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  • 6
    Electronic Resource
    Electronic Resource
    Melting of horizontal ice layer from above by combined effect of temperature and concentration of aqua-solvent (1987)
    Springer
    Heat and mass transfer 21 (1987), S. 227-232 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Der Aufsatz behandelt das Aufschmelzen einer horizontalen Eisschicht von oben mittels einer wäßrigen Lösung niedrigen Gefrierpunktes. Die in diesem Experiment verwendeten Lösungen sind Natriumchlorid NaCl, Kalziumchlorid CaCl2, Magnesiumchlorid MgCl2 und Harnsäure CO(NH2)2. Die Oberfläche der wäßrigen Lösung und der Schmelze wurde mit einer Infrarotlampe beheizt, deren Temperatur bei 8–40
    Notes: Abstract This paper is concerned with the melting of horizontal ice layer from above by aqua-solvent with low solidification point. The solute used in this experiment are Sodium chloride NaCl, Calcium chloride CaCl2, Magnesium chloride MgCl2, and Urea CO(NH2)2- The upper surface of aqua-solvent melt layer is heated by an infrared lamp, whose temperature is in the range of about 8
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01004025
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  • 7
    Electronic Resource
    Electronic Resource
    Pseudodirect biexcitons in GaAs/AlAs type-II superlattices (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 1629-1633 
    Details
    ISSN: 0392-6737
    Keywords: III–V semiconductors ; Excitons and related phenomena (including electron-hole drops) ; III–V compounds and systems ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We report on the biexciton formation of the pseudodirect exciton consisting of the AlAs-X z electron and the GaAs-Γ heavy hole in (GaAs) m /(AlAs) m type-II superlattices withm=10, 12, and 13 monolayers. The photoluminescence lineshape of the pseudodirect exciton exhibits a doublet feature having an energy separation of ∼3 meV at the excitation power of the order of mW/cm2 in all the samples, and the low-energy band grows superlinearly. The transient profiles of the doublet photoluminescence band early indicate the biexciton formation: the delay of the rise of the biexciton photoluminescence on the low-energy side and its shorter decay time in comparison with the exciton photoluminescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457255
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  • 8
    Electronic Resource
    Electronic Resource
    A unified analytical treatment of the acid-dissociation equilibria of weakly acidic linear polyelectrolytes and the conjugate acids of weakly basic linear polyelectrolytes (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 938-945 
    Details
    ISSN: 1435-1536
    Keywords: Key words Donnan model ; ion-exchange ; polyacrylic acid ; poly(N-vinylimidazole) ; acid-dissociation equilibria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The influence of added sodium chloride concentration levels on the acid-dissociation equilibria of a weakly acidic linear polyelectrolyte and a conjugate acid of weakly basic linear polyelectrolyte has been investigated potentiometrically by use of polyacrylic acid (PAA) and poly(N-vinylimidazole) (PVIm) as examples of polyelectrolytes. Both equilibria are strongly influenced by the degree of dissociation of the polyacids as well as the concentration levels of sodium chloride due to an electrostatic effect originating from the negatively or positively charged polymer surfaces. These have been analyzed in a unified manner by taking accounts of two-phase properties of the charged linear polyions. Distribution of counterions and coions between a polyelectrolyte phase formed around the polymer skeleton and a bulk solution phase has been rationalized by a Donnan’s relation. Introduction of a volume term for the polyelectrolyte phase permits definition of averaged concentrations of mobile ions in the vicinity of the polyion molecules, which enables us to define hypothetical intrinsic acid-dissociation constants in the polyion domain. The intrinsic constants estimated by extrapolation of apparent acid-dissociation constants at zero-charge state are in good agreement with the acid-dissociation constants of the monomer analogs of the polymers, i.e., acetic acid for PAA and imidazole for PVIm, respectively. The difference between the apparent and intrinsic acid-dissociation constants for PVIm was much higher than that for PAA at defined degree of dissociation of the polyacids, even though the separations of the functionalities fixed on the linear polymers are approximately equal to each other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050169
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  • 9
    Electronic Resource
    Electronic Resource
    Numerische Simulation durch Wirbel zu bestimmender Strömungsfelder im Schaufelgitter (1988)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 39 (1988), S. 50-64 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Wir benutzen die Weierstraßschen elliptischen Funktionen und die hyperbolischen Funktionen, um die von Wirbeln hervorgerufenen Strömungsfelder zu berechnen. Die Berechnungsgebiete sind: 1. Ein Parallogramm, beschränkt durch vier Wände 2. Ein Kanal, begrenzt durch obere und untere Wände 3. Ein halboffenes Gebiet, beschränkt durch obere, untere und linksseitige Wände. Die Methode der Wirbelanordnung und die erhaltenen Ergebnisse werden auch angegeben. Die Ergebnisse haben gezeigt, daß die geometrischen Orte und Geschwindigkeitsvektoren vernünftig beschrieben werden können. Es ist schließlich bewiesen worden, daß diese Berechnungsverfahren von großer Hilfe sind, um die sekundären Strömungen im dreidimensionalen Raum zu erklären.
    Notes: Abstract Wir benutzen die Weierstraßschen elliptischen Funktionen und die hyperbolischen Funktionen, um die von Wirbeln hervorgerufenen Strömungsfelder zu berechnen. Die Berechnungsgebiete sind: 1. a parallelogramm bounded by four boundaries 2. a channel restricted by upper and lower boundaries 3. a half region confined by upper, lower and left boundaries. The method of vortex distribution in a calculation plane and the calculated results are also shown. The loci of the vortices and velocity vectors show a reasonable behavior. It is concluded that this method is effective in analysing the secondary flows with vortices in a cascade.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00945721
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  • 10
    Electronic Resource
    Electronic Resource
    Role of the bivalveCorbicula japonica in the nitrogen cycle in a mesohaline lagoon (1988)
    Springer
    Marine biology 99 (1988), S. 369-374 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of the bivalveCorbicula japonica on the nitrogen cycle in Lake Shinji, a mesohaline brackish lagoon in Japan, was examined quantitatively based on field surveys and laboratory experiments carried out in the summer of 1982 and 1983. The biomass of the flesh ofC. japonica comprised 97% of the total biomass of the macrozoobenthos in summer. Total biomass ofC. japonica in the lake was estimated 30 986 t fresh wt. The concentration of suspended solids immediately above the lake bottom, whereC. japonica filters the water, was 1.5 to 4 times higher than that in the surface water. In laboratory experiments, the filtration rate was 5.0 litres g dry flesh wt-1 h-1, the excretion rates of ammonia and of feces and pseudofeces ofC. japonica were 200×10-6 g N g dry flesh wt-1 h-1 and 33.4 mg dry wt g dry flesh wt-1 h-1, respectively at 27°C, the average summer water temperature in the lake. From our study, we estimated thatC. japonica filters almost the same amounts of particulate organic nitrogen produced in the lake by phytoplankton and that supplied from rivers, and that it excretes 30% of filtered nitrogen as feces or pseudofeces and 18% as ammonia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02112129
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